Powered Inferior Turbinoplasty BIBLIOGRAPHY WITH ARTICLE SUMMARIES

TABLE OF CONTENTS

POWERED INFERIOR TURBINOPLASTY

Long-Term Outcomes of Microdebrider-Assisted and Radiofrequency-Assisted Turbinoplasty: Randomized Study (Huang et al, 2009) ...................................................................................1

Ten Years of Experience with an Inferior Turbinate Debriding Technique (Yáñez and Mora, 2008) ..................................................................................................................................................2

Radiofrequency vs Microdebrider Technique for Treating Inferior Turbinate Hypertrophy: a Randomized Study (Kizilkaya et al, 2008) ...........................................................................................................2

Effects of Microdebrider-Assisted Inferior Turbinoplasty on Nasal Resistance and Quality of Life in Patients with Allergic Rhinitis (Huang and Cheng, 2006) ...............................................3

Radiofrequency vs Microdebrider-Assisted Partial Turbinoplasty (Lee and Lee, 2006) .....................4

Modified Endoscopic Turbinoplasty, Submucosal Powered Turbinoplasty, and Submucosal Electrocautery: Randomized Trials (Sacks et al, 2005) ...........................................................5

Inferior Turbinate Reduction with the Microdebrider (Friedman, 2005) .................................................6

Intraturbinate Stroma Removal with the Microdebrider in Chronic Hypertrophic Rhinitis (Yáñez, 1998) ...................................................................................................................................................................6

Powered Instrumentation for Submucous Resection of the Inferior Turbinates (Friedman et al, 1999) .....................................................................................................................................................7

Mucosal-Sparing Techniques for Office Treatment of Inferior Turbinate Hypertrophy (Lee et al, 2001) ...............................................................................................................................................................8

OTHER INFERIOR TURBINOPLASTY TECHNIQUES

Histopathological Changes after Inferior Turbinate Reduction Using Coblation® Method (Berger et al, 2008) ..........................................................................................................................................................9

Number of Treatment Sessions for Bipolar Radiofrequency Volumetric Inferior Turbinate Reduction (Atef et al, 2006) ................................................................................................................ 10

Radiofrequency for Inferior Turbinate Hypertrophy and Use of a Preoperative Topical Vasoconstrictor Drop Test (Yilmaz et al, 2006) ................................................................................................. 11

Radiofrequency Treatment of Inferior Turbinate Hypertrophy: Long-Term Results (Porter et al, 2006) ....................................................................................................................................................... 11

Radiofrequency Turbinoplasty vs Traditional Surgery (Cavaliere et al, 2005) ...................................... 12

Randomized, Long-Term Trial of Six Treatments for Inferior Turbinate Hypertrophy (Pássali et al, 2003) ....................................................................................................................................................... 13

Coblation Inferior Turbinate Reduction (Bhattacharyya and Kepnes, 2003) ............................................. 14

Submucosal Diathermy for Chronic Nasal Obstruction Due to Turbinate Enlargement (Fradis et al, 2002) ........................................................................................................................................................ 14

Biopolar Radiofrequency Cold Ablation for Inferior Turbinate Hypertrophy (Bhattacharyya and Kepnes, 2002) ............................................................................................................................. 15

Radiofrequency for Turbinate Hypertrophy (Coste et al, 2001) ................................................................ 15

Radiofrequency Treatment of Turbinate Hypertrophy: Randomized Trial (Nease and Krempl, 2004) ........................................................................................................................................... 16

Radiofrequency Volumetric Tissue Reduction for Turbinate Hypertrophy (Li et al, 1998) ........... 16

Submucosal Bipolar Radiofrequency Ablation of Inferior Turbinates (Bäck et al, 2002) ................ 17

RELATED TOPICS

Subjective Assessment of Unilateral Nasal Obstruction (Clarke et al, 2006) ....................................... 18

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POWERED INFERIOR TURBINOPLASTY

Long-Term Outcomes of Microdebrider-Assisted and Radiofrequency-Assisted Turbinoplasty: Randomized StudyThe aim of the study described in this article was to compare long-term results of two mucosa-sparing techniques for treating inferior turbinate hypertrophy: microdebrider-assisted inferior turbinoplasty (MAIT) and radiofrequency-assisted inferior turbinoplasty (RAIT). The investi-gation enrolled 120 adult patients with chronic nasal obstruction and rhinitis unresponsive to medical treatment who were randomly assigned to undergo either MAIT or RAIT (n = 60 in each group). Patients with bony turbinate hypertrophy were excluded from the study. The MAIT operations were done with a 2.9 mm-diameter microdebrider tip (Medtronic ENT, Jacksonville, FL) rotating continuously in a circular pattern at 3000 rpm. The RAIT procedures used a Coblator® Plasma Surgery System (ArthroCare®, Austin, TX) at an output power level of four (168 to 182 Vrms).

None of the patients in either surgical group had active bleeding during or after their proce-dure. Seven patients in the MAIT group and none in the RAIT group had mucosal tears, but there was no loss of mucosa in either group. Postoperative crusting and synechia developed in seven patients in the MAIT group. No patient in the study had onset of atrophic rhinitis during the follow-up period.

Follow-up assessments were conducted 6 months, and 1, 2, and 3 years postoperatively. All patients in both groups returned for their 6-month and 1-year follow-up visits. At 2 and 3 years, the follow-up rate ranged from 89% to 95%. All follow-up visits included an evaluation of the severity of the patient’s symptoms (nasal obstruction, sneezing, rhinorrhea, and snoring) that used a visual analogue scale, active anterior rhinomanometry to measure total nasal resis-tance, and saccharin testing to assess nasal mucociliary transport.

The study found that, compared with preoperative findings, symptom scores, mean total nasal resistance value, and mean saccharin transit time in the MAIT group had improved significantly at all postoperative assessment times (P < 0.05). In the RAIT group, significant improvements were observed at 6 months and 1 year but not at 2 and 3 years. When results in the two groups were compared, none of the values for the assessed variables were significantly different at 6 months. At 1, 2, and 3 years, however, all results for both the subjective and objective variables were significantly better in the MAIT group (P < 0.05).

The authors of the article suggest that the difference in results between the MAIT and RAIT groups may have been due to the fact that the thermal injury and fibrosis or shrinkage of the submucosal turbinate tissue provided by RAIT could be insufficient in patients with prolonged hypertrophy, thereby leading to unsatisfactory volume reduction at 1 year and subsequently. The authors also comment that MAIT probably improved the patients’ long-term symptoms more effectively than did RAIT because MAIT removed submucosal tissue more thoroughly, including reducing the number of inflammatory cells and damage to the postnasal nerve branch.

Liu C-M, Tan C-D, Lee F-P, Lin K-N, Huang H-M. Microdebrider-assisted versus radiofrequency-assisted inferior turbinoplasty. Laryngoscope 2009;119:414-8.

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Ten Years of Experience with an Inferior Turbinate Debriding TechniqueThis article describes a prospective cohort study of the efficacy and long-term (10-year) outcome of the submucosal stroma debriding (SSD) technique in 341 patients with nonallergic chronic hypertrophy of the inferior turbinate unresponsive to medical therapy. The SSD opera-tion involved a 4 mm incision over the head of the inferior turbinate, creation of a submucosal tunnel along the turbinate with use of an elevator, and submucosal use of a debrider to remove the stroma and reshape the bone from the caudal to the posterior portion of the turbi-nate. Patients were evaluated 6 months and 1, 2, 5, and 10 years after surgery by using nasal endoscopy, acoustic rhinometry, measurements of saccharin transit time, and visual analog scales for assessment of symptoms.

One patient had bleeding requiring cauterization after an SSD procedure; no complications were observed in the other 340. At each of the five follow-up assessments, more than 90% of patients had no nasal obstruction. At 10 years postoperatively, 91% were symptom-free, 5% had some symptoms, and 4% had recurrence of obstruction. Compared with baseline values, there were significant decreases in turbinate engorgement/size and mucociliary saccharin transit times and significant increases in nasal flow during follow-up. A control group of volun-teers with no history of nasal or sinus problems or nasal surgery had no significant changes in any of these variables during the 10-year follow-up period.

The authors comment that the longlasting effects of SSD are probably due not only to volumetric changes but also to a reduction in the capacity of the inferior turbinate to engorge in response to environmental stimuli. The authors conclude that the SSD method has several advantages: minimal invasiveness, cost savings (the debrider blade is cheaper than radiofrequency or Coblation® applicators), simplicity, and more effective and controlled anterior-to-posterior reduction of the turbinate stroma and bone without damage to the respiratory epithelium.

Yañez C, Mora N. Inferior turbinate debriding technique: ten-year results. Otolaryngol Head Neck Surg 2008;138:170-5.

Radiofrequency vs Microdebrider Technique for Treating Inferior Turbinate Hypertrophy: a Randomized StudyThe goal of this prospective randomized study was to compare the efficacy of submucosal temperature-controlled radiofrequency tissue-volume reduction (TCRFTVR) and submucosal resection with a microdebrider (SMRM) in the treatment of nonallergic chronic inferior turbi-nate hypertrophy. The 30 patients in the study were treated with TCRFTVR on one side and SMRM on the other. The radiofrequency energy was delivered to three different sites on each turbinate. The SMRM procedure involved a 0.5 mm vertical incision in the anterior aspect of the inferior turbinate; creation of a submucosal pocket on the medial surface of the bony turbinate; debridement of the inferior aspect of the bony turbinate and some of the submu-cosal tissue with a straight microdebrider (4 mm tip, Tricut blade, 3000-cps oscillating mode) in a ventrocaudal manner; and sponge nasal packing. The results of TCRFTVR and SMRM treat-ment were assessed 12 weeks and 6 months postoperatively with use of a visual analog scale, tests of nasal epithelial function, and acoustic rhinometry.

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There were no serious complications in either the TCRFTVR or SMRM sides and no significant differences in complication rates between the two procedure types. Significant improvements in obstructive symptoms and rhinometry variables had occurred in both treatment groups by postoperative week 12 and were sustained at 6 months. No significant changes were observed in saccharin transit time or ciliary beat frequency. Four of the TCRFTVR sides and two of the SMRM sides required a revision operation (P not significant). There were no significant differ-ences between TCRFTVR and SMRM in any outcome at either assessment time.

The authors comment that TCRFTVR and SMRM, two mucosa-sparing procedures, had iden-tical results in their study. They also noted that the sides treated with SMRM did not have more serious intraoperative or postoperative bleeding, although mucosal tears and synechia were observed; that nasal packing is not required after TCRFTVR; that TCRFTVR may be more expen-sive because of the high cost of the disposable needle tip compared with the multiple-use tips employed in SMRM; and that the possibly lower rate of revision operations required after SMRM compared with TCRFTVR should be investigated in future studies with more patients and a longer follow-up time. The authors conclude that TCRFTVR is more minimally invasive than SMRM.

Kizilkaya Z, Ceylan K, Emir H, Yavanoglu A, Unlu I, Samin E, Akagün MC. Comparison of radiofrequency tissue volume reduction and submucosal resection with microdebrider in inferior turbinate hypertrophy. Otolaryngol Head Neck Surg 2008;138:176-81.

Effects of Microdebrider-Assisted Inferior Turbinoplasty on Nasal Resistance and Quality of Life in Patients with Allergic RhinitisThis prospective study compared the results of both objective and subjective assessments in 50 patients with perennial allergic rhinitis before and 1 year after inferior turbinoplasty using a microdebrider with a small (2 mm) blade incorporated with an elevator (Medtronic ENT). The objective evaluations were measurements of total nasal resistance at anterior rhinoma-nometry. The subjective analysis used the Rhinoconjunctivitis Quality of Life Questionnaire (RQLQ), which addresses seven separate domain issues (e.g., sleep, nasal symptoms, and eye symptoms), as well as overall condition. Preoperatively, all patients had substantial mucosal hypertrophy of the inferior turbinates. Debridement of submucosal tissue from the inferior turbinates was performed with the microdebrider blade positioned mediolaterally from the submucosal plane and at a speed of up to 3000 rpm.

No patient had postoperative bleeding, crusting, synechia, foul odor, or atrophic changes. Five had a mucosal tear but no loss of mucosa. One year after surgery, there were significant improvements in nasal resistance (preoperative and postoperative values, 0.45 and 0.28 Pa/cm3 per second, respectively; P < 0.001) and all separate domain and overall RQLQ scores (P < 0.005).

The authors note that the microdebrider technique achieved effects similar to those of submu-cosal turbinectomy: it relieved nasal obstruction, decreased the allergy-affected cells, and destroyed the branch of the postnasal nerve, which contributes to sneezing and hyperse-cretion, thereby improving several nasal symptoms (obstruction, rhinorrhea, sneezing, and

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postnasal drip). They also mention several other benefits of the procedure: it can be performed on an outpatient basis with use of local anesthesia, the postprocedure duration of nasal packing is shorter, and visualization with a 30-degree endoscope is improved. The authors conclude that microdebrider-assisted inferior turbinoplasty offers effective volume reduction with preservation of the physiologic function of the turbinates and it averts complications.

Huang T-W, Cheng P-W. Changes in nasal resistance and quality of life after endoscopic microdebrider-assisted inferior turbinoplasty in patients with perennial allergic rhinitis. Arch Otolaryngol Head Neck Surg 2006;132:990-3.

Radiofrequency vs Microdebrider-Assisted Partial Turbinoplasty This article describes a randomized, long-term study that compared outcomes achieved with radiofrequency (RF; Somnus Medical Technology) with those obtained with a microdebrider (Medtronic ENT) in partial turbinoplasty for the treatment of nasal obstruction due to infe-rior turbinate hypertrophy. Thirty patients underwent an RF procedure (group 1), and 30 had a microdebrider-assisted operation (group 2). In group 1, a 1 mm-diameter RF needle electrode was inserted submucosally at the anterior head of the inferior turbinate into the posterior portion, and the turbinate was ablated by using a power level of 6 W. In group 2, redundant and hypertrophied mucosa on the inferomedial side of the inferior turbinate and anterior head region was trimmed with a microdebrider with a straight, 4 mm, aggressive-cut blade employed at a speed of 2300 to 3000 rpm.

A visual analog scale was used to assess the patients’ perceptions of symptoms of nasal obstruction preoperatively and 3, 6, and 12 months after surgery. Data on the patients’ satis-faction with their treatment were also obtained, as was information on preoperative and postoperative postnasal drip. Operating time, duration of crust formation, and any postoper-ative bleeding episodes were recorded for each patient. Acoustic rhinometry was performed preoperatively and 12 months after surgery.

In both groups, nasal obstruction was significantly improved compared with preoperative levels at all postoperative assessment times. Twelve months after surgery, symptom improve-ment was significantly greater in patients in group 2 (the microdebrider group) compared with those in group 1 (P > 0.05). Also at 12 months, group 2 patients had significantly better acoustic rhinometry results, and more patients in that group than in group 1 were satisfied with the results of their surgery. There was no significant difference between group 1 and 2 with respect to operating time, duration of crust formation, or postnasal drip. Group 2 had significantly more cases of postoperative bleeding (eight cases vs two in group 1).

The authors note that the microdebrider is now regarded as an essential instrument in surgical rhinology. It can be used either on the external turbinate surface (the method the authors prefer) or within the turbinate, and it allows precise removal of soft tissue. The authors spec-ulate that the inferior long-term results with RF may have been due to insufficient thermal injury and fibrosis or shrinkage of turbinate mucosa and slight mucosal swelling after 6 months postoperatively. In contrast, say the authors, the microdebrider effectively and precisely reduces the external surface of the hypertrophied inferomedial mucosa and the ante-rior head of the inferior turbinate, without increasing the time required for mucosal healing.

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Although the number of postoperative bleeding episodes was higher in group 2, all were easily controlled by temporary nasal packing. The authors conclude that they expect the use of the microdebrider in turbinate surgery to increase and that the safety and effectiveness of the microdebrider method will be confirmed by subsequent studies.

Lee JY, Lee JD. Comparative study on the long-term effectiveness between coblation- and microdebrider-assisted partial turbinoplasty. Laryngoscope 2006;116:729-34.

Modified Endoscopic Turbinoplasty, Submucosal Powered Turbinoplasty, and Submucosal Electrocautery: Randomized TrialsThis article describes two prospective, randomized, controlled, double-blinded trials: one comparing submucosal electrocautery (SEC) with submucosal powered turbinoplasty (SPT) and one comparing SPT with modified endoscopic turbinoplasty (MET). All patients had symptom-atic nasal obstruction (allergic or nonallergic) that was unresponsive to medical therapy. The turbinate reduction method was determined randomly. Patients with odd numbers underwent SPT on the left side and those with even numbers underwent SPT on the right side. The opposite turbinate was treated with SEC or MET, depending on the trial. Patients’ subjective scores for nasal obstruction and rhinorrhea were obtained 1, 4, and 12 months after surgery, as were results of clin-ical examinations, rhinometry, anterior rhinoscopy, and nasendoscopy conducted by examiners blinded to the treatment method.

The MET procedures included creation of a window at the anterior aspect of the inferior turbinate to access the lateral mucosa, rather than medial fracturing of the turbinate, which can destabilize it and make the reduction procedure more difficult. A microdebrider blade (Medtronic ENT) was used to remove mucosa on the lateral aspect of the inferior turbinate and expose the turbinate bone. An elevator was employed to lift the medial mucosa away from the bone in a subperiosteal plane, thereby allowing a sharp dissection and reduction of trauma to the mucosa.

The only postoperative complications in the study were moderate bleeding (not requiring packing), which occurred in none of the 50 patients who had SEC, 7 of the 100 patients who had SPT, and 2 of the 50 patients who had MET; crusting, which occurred in 58% SEC, 2% SPT, and no MET patients; and pain, which occurred in 22% SEC, 9% SPT, and 14% MET patients.

In the SEC vs SPT trial, both procedures initially improved subjective nasal obstruction symptoms effectively in at least 92% of cases. Over time, however, regular use of decongestants increased in both treatment groups, suggesting a deterioration in the benefit the therapy. The examiner assessments revealed a significantly higher rate of improvement in nasal patency in the SPT group. In the SPT vs MET trial, both procedures initially improved subjective nasal obstruction symptoms effectively in at least 96% of cases. In the SPT group, however, regular use of decon-gestants increased from 1 to 12 months postoperatively. In the MET group compared with the SPT group, significantly more patients had relief of nasal obstruction with only occasional or no use of decongestants at the 4- and 12-month assessments. The rate of change between the objective examiner scores comparing SPT to MET was not statistically significant. None of the three procedures decreased rhinorrhea significantly.

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The authors conclude that powered turbinoplasty provides an effective, reliable, long-term improvement in nasal airway patency and relief of nasal obstruction, with minimal compli-cations. They also comment that powered turbinoplasty is cost-effective and technically straightforward.

Sacks R, Thornton MA, Boustred RN. Modified endoscopic turbinoplasty—long-term results compared to submucosal electrocautery and submucosal powered turbinoplasty. Presented at: American Rhinologic Society Spring Meeting; May 13-16, 2005; Boca Raton, FL.

Inferior Turbinate Reduction with the MicrodebriderThis article describes the microdebrider (Medtronic ENT) submucosal procedure for reducing the nasal turbinates in children with sleep-disordered breathing (SDB) associated with turbinate swelling refractory to medical treatment. The author notes that there are a variety of tech-niques for reducing turbinate size, but the ideal procedure spares the mucosal lining, thereby promoting a quicker recovery and possibly decreasing the likelihood of excessive bleeding and the development of atrophic rhinitis. For these reasons, the author terms the Medtronic ENT infe-rior turbinate blade to be an ideal instrument for performing the procedure.

Most turbinate reductions for SDB are done in conjunction with an adenotonsillectomy, which is performed first. At the beginning of the reduction procedure, a nasal decongestant spray is applied and the anterior aspect of the inferior turbinate is injected with lidocaine with epinephrine. The blade of the microdebrider (which has an elongated flat surface on one side that facilitates dissection) is positioned at the anterior-inferior edge of the inferior turbinate. The blade is then bluntly inserted at a 45-degree angle until it touches the turbinate bone. The microdebrider is set in oscillating mode at 1000 cycles per second, and the blade is pushed posteriorly along the bone for about 2 cm; going further may violate the mucosal lining and cause excessive bleeding. Once a pocket has been developed between the turbinate bone and submucosal layer, the blade is rotated to face the mucosa lining and the submucosal layer is resected. The author believes that the use of a lower cycle-per-second setting helps maintain the integrity of the lining. Postoperatively, minor oozing may occur for a few hours or days. The author states that the role of nasal obstruction in sleep-disordered breathing is often over-looked by clinicians, and concludes that turbinate reduction with the microdebrider is a simple and safe technique.

Friedman NR. Inferior turbinate reduction: an application for the microdebrider. Oper Tech Otolaryngol 2005;16:232-4.

Intraturbinate Stroma Removal with the Microdebrider in Chronic Hypertrophic RhinitisThe author describes the microdebrider technique he uses for reduction of hypertrophic turbi-nates and briefly reviews his results in 63 patients. Under visualization through a rigid endoscope or surgical microscope, an anesthetic and vasoconstricting agent is infiltrated into the head of the inferior turbinate. An incision is made on the inferior and lateral border of the head, a plane is created along the turbinate, and the microdebrider tip is inserted into it. The microdebrider speed is set to 1800 rpm, with the suction indicator set to low. The tip is moved in a circular motion to remove stroma. The entire procedure takes only a few minutes. Nasal packing mate-rial soaked in oxymetazoline is kept in place for a few hours postoperatively. If a very enlarged

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turbinate tail is present, the reduction procedure can be performed in front of or over its body to debride stroma from the site. In the author’s series, no nasal bleeding occurred after the micro-debrider procedure. Postoperative problems were minor and consisted of nasal congestion in 47 patients at 1 week after surgery, 18 patients at 2 weeks, and 3 patients at 1 month. Postoperative burning or itching and rhinorrhea occurred in a maximum of two and four patients, respectively. Pain was not reported by any patient. No problems were reported after 1 month. Among the 63 patients treated, 57 had improvements in subjective symptoms by 4 weeks after surgery, 61 by 2 months, 62 by 6 months, and all by 1 and 2 years. The author concludes that the microdebrider method is safe and reliable. In addition, because it is a mucosa-sparing technique, mucociliary flow patterns are not disturbed, so protection, filtration, and humidification processes continue and iatrogenic atrophic rhinitis is unlikely to develop. In contrast, many common methods for treating turbinate hypertrophy, including cauterization, diathermy, cryotherapy, total or partial resection, and laser treatment, are destructive.

Yáñez C. New technique for turbinate reduction in chronic hypertrophic rhinitis: intraturbinate stroma removal using the microdebrider. Oper Tech Otolaryngol Head Neck Surg 1998;9:135-7.

Powered Instrumentation for Submucous Resection of the Inferior TurbinatesThe authors note that submucous resection of the inferior turbinates is a conventional technique for decreasing turbinate size to alleviate airway obstruction. Several methods have been used to reduce the turbinates, including turbinectomy, submucous turbinectomy, inferior turbino-plasty, cryotherapy, submucous electrosurgery, and carbon dioxide laser turbinoplasty. None of these techniques is perfect, and each has been associated with complications such as exces-sive resection resulting in atrophic rhinitis, postoperative bleeding, and crusting. Most also involve destruction of the mucosa, which affects nasal physiology, yet the main goal of infe-rior turbinate surgery should be preservation of mucosal surfaces while reducing submucosal and bony tissue. In an effort to achieve this goal, the authors began to use powered microde-brider instrumentation. This article describes their results with this technique in a prospective study enrolling 120 patients with symptoms and signs of nasal obstruction and stuffiness related to enlarged turbinates. The microdebrider procedure begins with an incision in the anterior aspect of the bony turbinate and the creation, by sharp dissection, of a submucosal pocket on its medial surface. The microdebrider is inserted into this pocket. The bony turbinate and some of the submucosal tissue are debrided with the device set in 3000-cps oscillating mode. Hemostasis is achieved by using suction electrocautery under direct visualization. The incision is not closed. The reduction in turbinate size is immediately apparent.

Preoperatively and 6 weeks postoperatively in this series, anterior rhinoscopy and nasal endos-copy were used to grade the size of the turbinates. Patients also completed questionnaires about their nasal symptoms before and 6 weeks after surgery.

Postoperative bleeding necessitating a return to the operating room occurred in two patients (1.6%) early in the series; subsequently, a modification in cautery technique was made and no additional bleeding complications occurred. Mucosal tears were observed in 55% of patients, but there was no loss of mucosa. Synechia developed in 5%. No patient had crusting, foul odor, or nasolacrimal duct injury. The questionnaire data showed that the number of patients

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with severe bilateral nasal obstruction or stuffiness decreased from 100 preoperatively to none postoperatively. Ninety patients had no nasal obstruction or stuffiness after surgery. Reduction of the inferior turbinates was observed in all patients.

The authors note that the microdebrider allows precise and incremental tissue removal, thereby preventing many of the complications associated with inferior turbinate surgery. They believe that the ability to debulk the turbinate while preserving the mucosa is the major advantage of the powered procedure. The authors conclude that microdebrider submucous resection of the inferior turbinates is a safe method for achieving turbinate size reduction in patients with nasal obstruction due to inferior turbinate hypertrophy.

Friedman M, Tanyeri H, Lim J, Landsberg R, Caldarelli D. A safe, alternative technique for inferior turbinate reduction. Laryngoscope 1999;109:1834-7.

Mucosal-Sparing Techniques for Office Treatment of Inferior Turbinate HypertrophyEach of the three authors describes a different, innovative office procedure for inferior turbinate hypertrophy. The authors note that there are many methods for reducing the inferior turbinates. Most improve the nasal airway, but the structures that remain postoperatively may be unable to regulate airflow adequately, and morbidity (bleeding, crusting, and pain) varies considerably. The three new approaches described all have mucosal preservation as one of their basic goals.

The first approach, radiofrequency volumetric tissue reduction, uses radiofrequency (RF) heating to induce submucosal tissue destruction that results in a decrease in tissue volume. The procedure employs an RF generator (Somnus Medical Technologies) connected to a single-use delivery tip and handpiece. Under direct visualization, the RF electrode is placed in the anterior inferior portion of the turbinate and RF energy is delivered at maximum settings of 10 W, 75°C, and 500 J for about 90 seconds. A topical vasoconstrictor is applied to mini-mize bleeding. The author has found this procedure to be quick and associated with high patient satisfaction and tolerance. A 70% to 80% subjective improvement can be expected. Disadvantages include the equipment cost and risk of mucosal ulceration and epistaxis. The technique also has limitations with respect to precise control of the degree of tissue reduction and obtaining access to the posterior aspect of the inferior turbinate.

The Coblation® method (ArthroCare®) uses RF energy between electrodes in a saline medium to create a field of ionized sodium molecules capable of ablating tissue. The author uses the bipolar wand to make four to six tunnels on each inferior turbinate. In each tunnel, the wand is advanced along the underlying bone with the Coblation mode activated and then withdrawn slowly with the cautery mode activated. Bleeding from the puncture sites is common, so topical oxym-etazoline is applied. The author concludes that the Coblation procedure allows rapid, aggressive reduction of the entire inferior turbinate, which retains its ability to function as a filter and humidifier. Patients recover quickly, with minimal pain and nasal problems.

Microdebrider-assisted turbinate reduction involves excision of the erectile soft tissue of the inferior turbinate with preservation of the overlying mucosa. A stab incision to the level of

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the turbinate bone is made at the anterolateral surface of the inferior turbinate, and a supra-periosteal plane of elevation is developed. A suction elevator is inserted to clear blood from the operative field. The active face of the microdebrider blade is positioned outward toward the mucosal surface. Soft tissue is then resected under endoscopic visualization. Areas of dissection and stroma removal should include the turbinate surface and the lateral wall, lateral and supe-rior to the turbinate attachment. The author mentions several advantages of the microdebrider approach. First, in contrast to thermoreductive techniques, it allows definitive, controlled volume reduction. Second, the resection can be tailored to individual anatomical variations. Third, the turbinate mucosa is preserved, allowing rapid healing and preservation of the humidification and mucociliary transport properties of the turbinate. Finally, the approach can be done either in the operating room as an adjunct to other procedures or in the clinic as the sole procedure. The risk of postoperative bleeding after microdebrider treatment is higher than that after thermoab-lative procedures, but packing is effective in minimizing the risk. Also, care must be taken to avoid perforating the mucosal turbinate flap during resection using the microdebrider.

Lee KC, Hwang PH, Kingdom TT. Surgical management of inferior turbinate hypertrophy in the office: three mucosal sparing techniques. Oper Tech Otolaryngol Head Neck Surg 2001;12:107-111.

OTHER INFERIOR TURBINOPLASTY TECHNIQUES

Histopathological Changes after Inferior Turbinate Reduction Using Coblation® MethodThis article describes a study of the histopathological features of 22 soft-tissue samples obtained from 16 patients in whom Coblation® inferior turbinate reduction (CITR; performed with a Coblator with a ReFlex Ultra® 45 Wand, ArthroCare®) failed to provide any or perma-nent relief from nasal obstruction. The samples were obtained during endoscopically guided inferior turbinate mucotomy done with a microdebrider 4 to 33 months after CITR. Thirteen of the 16 patients had experienced no symptom relief after CITR; in the other 3, symptoms had recurred 6, 9, and 18 months, respectively, following the procedure. The samples from the CITR-treated patients were compared with 18 archived hypertrophic IT specimens (controls) from 14 patients who had undergone inferior turbinectomy alone.

All samples were assessed both qualitatively and quantitatively. The qualitative evaluation investigated the type of epithelium, the presence of inflammation and fibrosis, and the popu-lation of submucosal glands and venous sinusoids. The quantitative analysis included standard stereologic and morphometric assessments of the area fraction (relative proportion) of epithe-lium, connective tissue, glands, arteries, and venous sinusoids in the soft tissue. To determine epithelial integrity, the researchers also measured the length of the basement membrane that was covered with intact pseudostratified ciliated columnar epithelium, that was covered with only a single layer of basal cells (indicative of partial epithelial shedding), and that was devoid of epithelial cells.

The qualitative analysis showed that areas treated with CITR had marked fibrosis and depletion of submucosal glands and venous sinusoids in the lamina propria. The quantitative evaluation found that, compared with control samples, samples from CITR-treated patients had a signifi-cantly increased relative proportion of connective tissue and a significantly decreased relative proportion of submucosal glands and venous sinusoids (P < 0.001 for all three comparisons). The CITR samples also had a significantly decreased relative proportion of intact epithelium

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(P = 0.03) and a significantly increased relative proportion of partial epithelial shedding (P = 0.04). The authors comment that the partial epithelial shedding in the CITR samples prob-ably resulted from a reduction in epithelial perfusion caused by vascular damage.

The authors note that although CITR uses far lower temperatures than laser techniques for treating hypertrophied inferior turbinates, some of the histopathological changes in the CITR samples they studied (ie, significantly increased connective tissue areas and signifi-cantly decreased areas of submucosal glands and venous sinusoids) were very much like those observed after laser treatment. The authors conclude that the long-term implications of these pathological changes on normal nasal physiologic features should be considered when assessing whether to perform CITR.

Berger G, Ophir D, Pitaro K, Landsberg R. Histopathological changes after Coblation inferior turbinate reduction. Arch Otolaryngol Head Neck Surg 2008;134:819-23.

Number of Treatment Sessions for Bipolar Radiofrequency Volumetric Inferior Turbinate ReductionThe aim of this prospective study in 102 patients was to determine whether the number of treatment sessions affects the longstanding results of submucosal bipolar radiofre-quency volumetric tissue reduction (BRVTR; Coblator®, ArthroCare®) of the inferior turbinate. Preoperatively, all patients had chronic hypertrophic rhinitis, hypertrophied inferior turbinates (allergic or nonallergic), and nasal obstruction unresponsive to medical treatment. During the procedure, the BRVTR unit was activated to a power between 5 and 6 (maximum power) and three to four passes were done in each turbinate.

An immediate reduction in turbinate size was achieved during the BRVTR treatments, but this was followed by rebound swelling and edema; thus, final results were not achieved for about 6 weeks. The maximum number of treatment sessions per patient during this time was five. If complete symptom resolution did not occur after five treatment sessions, the patient was excluded from the study. A year after the last treatment session in the patients remaining in the study, a follow-up assessment using a visual analog scale (VAS) and acoustic rhinometry was conducted.

Twelve of the 102 patients (12%) did not have complete relief from nasal obstruction after five BRVTR treatment sessions. Of the remaining 90 patients (88%), 9 (10%) needed one session, 28 (31%) needed two, 29 (32%) needed three, 15 (17%) needed four, and 9 (10%) needed five to obtain complete relief. In patients who had only one treatment session, a subjective sense of nasal blockage and VAS values for nasal obstruction had increased significantly compared with the 6-week findings by a year after treatment, whereas turbinate volume (TV) and nasal fossa volume (NV) decreased significantly. In patients given two treatment sessions, satisfactory results (by both objective and subjective criteria) were not maintained a year after the proce-dures. In patients who had three or four sessions, good results were maintained for the first year. In patients given five sessions, the values for TV increased significantly after a year, whereas changes in VAS and NV values were insignificant.

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The authors note that the most important disadvantage of BRVTR turbinate reduction is that the rate of improvement in nasal symptoms decreases over time, thereby requiring repetition of treatment. The authors conclude that BRVTR treatment is effective and well tolerated but that achievement of good longstanding results requires multiple treatment sessions.

Atef A, Mosleh M, El Bosraty H, El Fatah GA, Fathi A. Bipolar radiofrequency volumetric tissue reduction of inferior turbinate: does the number of treatment sessions influence the final outcome? Am J Rhinol 2006;20:25-31.

Radiofrequency for Inferior Turbinate Hypertrophy and Use of a Preoperative Topical Vasoconstrictor Drop TestThis prospective study in 22 patients had two objectives: (1) to assess results (up to 6 months) of radiofrequency volumetric tissue reduction (RFVTR) for treatment of inferior turbinate hypertrophy refractory to medical therapy and (2) to ascertain whether improve-ments in symptoms after RFVTR correlated with the results of a topical vasoconstrictor drop test (TVDT) administered preoperatively. The RFVTR treatment (15 W) was applied at each of three different turbinate sites for 20 seconds (total, 60 seconds per turbinate). The TVDT used 0.14 g of xylometazoline hydrochloride sprayed into the nasal airway. Nasal obstruction was evaluated by using a visual analog scale (VAS, with 0 representing no obstruction and 10 representing complete and constant obstruction) preoperatively, after the preoperative TVDT, and 1, 2, 4, 6, 8, 12, and 24 weeks after surgery.

Six patients required unilateral nasal packing after RFVTR. Fifteen of the 16 remaining patients had some nasal discharge and hemorrhage for up to 7 days after surgery. Mild immediate postoperative pain was also reported. Preoperative administration of the TVDT resulted in a significant transient decrease in the mean VAS value (from 8 to 3). After RFVTR, VAS values decreased significantly from the 2nd to the 12th postoperative week, and then increased to about the preoperative post-TVDT level by the 24th week. The authors note that treatment success was not apparent for the first weeks after therapy but that, from the 4th week on, about half the patients had an apparent treatment success. They also conclude that their data show that the results of RFVTR were clearly predicted by the TVDT. Therefore, say the authors, the success of RFVTR does not correlate with the level of nasal obstruction noted by the patient; rather, it correlates with the response of the patient’s turbinates to the TVDT.

Yilmaz M, Kemaloglu YK, Baysal E, Tutar H. Radiofrequency for inferior turbinate hypertrophy: could its long-term effect be predicted with a preoperative topical vasoconstrictor drop test? Am J Rhinol 2006;20:32-5.

Radiofrequency Treatment of Inferior Turbinate Hypertrophy: Long-Term ResultsThe goal of this study was to assess the long-term efficacy of radiofrequency volumetric tissue reduction (RFVTR) in the treatment of inferior turbinate hypertrophy. The study initially enrolled 32 patients: 16 who were randomly assigned to the RFVTR treatment group and 16 to the placebo group. Anesthesia, placement of the RFVTR probe, and sound from the RFVTR generator were experienced by patients in both groups; however, active radiofrequency energy was delivered only in the RFVTR treatment group. Patients remained in their assigned groups for 8 weeks after the actual or placebo treatment. At the 8-week evaluation, those in the placebo group were informed of their status and offered the option to cross over to RFVTR treatment. Twelve elected this option; therefore, a total of 28 patients received RFVTR, but the trial was not placebo-controlled after 8 weeks postoperatively.

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The results of treatment were determined by use of a visual analog scale (VAS; with 0 repre-senting no symptoms and 10 representing the worst symptoms imaginable) before treatment and 8 weeks, 6 months, and 1 and 2 years afterward. The VAS assessed severity and frequency of obstruction and overall ability to breathe. The data analysis compared pretreatment and posttreatment scores from the 28 patients who received either initial or crossover RFVTR treat-ment. The authors do not report results in the initial placebo group (results earlier than 8 weeks after treatment).

Four patients who underwent RFVTR had mild to moderate pain requiring acetaminophen; two others felt faint during the RFVTR procedure but were able to complete treatment. Only 19 of the 28 patients (68%) completed the entire 2 years of follow-up, which, the authors note, may have introduced bias. All changes in VAS scores for all assessment times and symptoms indicated significant improvement (P < 0.05) over pretreatment levels, although symptoms were not eliminated. The mean VAS scores for frequency of nasal obstruction, severity of obstruction, and overall ability to breathe were 4.1, 4.1, and 4.0, respectively, at 1 year post-treatment and 4.1, 4.9, and 4.2 at 2 years. Mean pretreatment VAS values for these symptoms were 7.8, 7.7, and 7.5, respectively.

The authors conclude that their study indicates that RFVTR provides long-term symptom relief similar to or better than that provided by other surgical treatments for inferior turbinate hyper-trophy. They also mention the need for randomized controlled trials comparing RFVTR with submucosal resection of the inferior turbinate, as well as the need for objective measures of the results of treatment for inferior turbinate hypertrophy.

Porter MW, Hales NW, Nease CJ, Krempl GA. Long-term results of inferior turbinate hypertrophy with radiofrequency treatment: a new standard of care? Laryngoscope 2006;116:554-7.

Radiofrequency Turbinoplasty vs Traditional SurgeryThe prospective study described in this article included three groups of patients (25 in each group) with manifestations of nasal obstruction associated with inferior turbinate hyper-trophy refractory to medical therapy. Patients in group A underwent turbinoplasty using classic surgical submucosal resection, group B patients had radiofrequency volumetric tissue reduction (RFVTR), and group C patients (controls) were not treated. Nasal endoscopy, a visual analog scale, anterior active positional rhinomanometry, and saccharin tests were used to assess treatment outcomes 1 week and 1 and 3 months after surgery.

Turbinate edema and secretions decreased significantly compared with preoperative values in patients in groups A and B beginning a month postoperatively, although there was a tempo-rary increase in secretions in group A patients a week after surgery. Patients in groups A and B had significant improvements in nasal obstruction and related symptoms at 1 and 3 months after surgery, as well as a significant increase in nasal flow at 3 months. The nasal mucociliary transport time increased in group A at 1 week, but the differences among the three groups with respect to this measure was not significant at 1 month.

The authors say that both RFVTR and traditional turbinoplasty are effective but that RFVTR offers several advantages: it requires only local anesthesia, nasal packing is not required, it

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does not change mucociliary function or increase secretions and crusts, and patients can be discharged immediately after treatment. The authors conclude, however, that because of the short follow-up in their study, longer-term studies are needed to provide a more definitive evaluation of the equivalency of RFVTR and traditional turbinoplasty.

Cavaliere M, Mottola G, Iemma M. Comparison of the effectiveness and safety of radiofrequency turbinoplasty and traditional surgical technique in treatment of inferior turbinate hypertrophy. Otolaryngol Head Neck Surg 2005;133:972-8.

Randomized, Long-Term Trial of Six Treatments for Inferior Turbinate HypertrophyIn this 6-year study, 382 patients with nasal obstruction due to turbinate hypertrophy unresponsive to medical therapy were randomly assigned to undergo one of six surgical procedures to reduce the turbinates: turbinectomy, carbon dioxide laser cautery, electrocau-tery, cryotherapy, submucosal resection, and submucosal resection with lateral displacement. The submucosal resection technique in this paper appears to describe a manual version of the powered removal of stromal tissue. Turbinectomy involved medial and upward fracture and resection by angled scissors along the insertion close to the lateral nasal wall. Electrocautery employed a high-frequency current delivered at a constant power to coagulate the medial surface of the inferior turbinate. For cryotherapy, a standard nasal probe was applied along the free edge and medial face of the inferior turbinate. In submucosal resection, an incision was made on the head of the inferior turbinate, submucosal tissue was dissected from the medial surface and inferior edge of the bone with an elevator, excess cavernous tissue was resected with a Hartmann forceps, and the posterior end of the turbinate was resected. Submucosal resection with lateral displacement included out-fracture and lateral displacement of bone.

Postoperatively, the turbinectomy, laser cautery, electrocautery, and cryotherapy groups had chronic crusting in 34, 40, 39, and 40 cases, respectively, with synechiae developing more frequently in the electrocautery group (21 cases). Bleeding occurred only in patients treated with turbinectomy (25 cases), submucosal resection (10 cases), or submucosal resection with displacement (8 cases). Patients underwent yearly postoperative examinations for up to 6 years. A significant initial postoperative improvement in nasal resistance values (on rhinoma-nometry and nasal volume assessments) occurred in all treatment groups (P < 0.001), but there were significant differences among groups in improvement duration. Patients given turbine-ctomy or submucosal resection had normal, sustained nasal patency during follow-up. In contrast, patients who underwent electrocautery or cryotherapy had a progressive, signifi-cant worsening of nasal resistance (P < 0.005) and nasal volume values (P < 0.001). After laser treatment, nasal resistance improved and remained normal, but nasal volumes decreased dramatically during the 6 follow-up years (P < 0.001). Only patients who had a submucosal procedure achieved normal mucociliary transport times and secretary IgA concentrations (P < 0.001), with those who also underwent lateral displacement having the best results.

The authors note that the ideal surgical approach to inferior turbinate hypertrophy should be limited to the erectile submucosal tissue and bony turbinate because the reduction in bone size will create more respiratory space, the surgical maneuvers on the submucosal tissues will create scars that can minimize submucosal engorgement in patients with allergic rhinitis, and the preservation of the mucosa will minimize interference with physiologic functions. The

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authors conclude that submucosal resection with lateral displacement comes closest to this ideal and recommend it as the first-choice treatment for nasal obstruction due to inferior turbinate hypertrophy.

Passàli D, Passàli FM, Damiani V, Passàli GC, Bellussi L. Treatment of inferior turbinate hypertrophy: a randomized clinical trial. Ann Otol Rhinol Laryngol 2003;112:683-8.

Coblation® Inferior Turbinate ReductionThis prospective study investigated the safety and clinical effectiveness of the Coblation radio-frequency technique (ArthroCare) for inferior turbinate reduction in 26 adult patients with soft-tissue inferior turbinate hypertrophy unresponsive to medical therapy. The patients completed the Rhinosinusitis Symptom Inventory (RSI) and a short-form nasal questionnaire before and 3 and 6 months after treatment. Two patients (8%) had marked epistaxis after the procedure; one required nasal packing for 24 hours. At both the 3- and 6-month follow-up assessments, there were significant improvements over preoperative RSI and nasal-question-naire scores for nasal symptoms, systemic symptoms, overall sinonasal symptoms, degree of nasal obstruction, and amount of time with nasal obstruction. There were no significant improvements in mucus production, postnasal discharge, or snoring. The authors conclude that the Coblation method is quick and yields good, persisting clinical results. Moreover, as a submucosal technique, it preserves overall nasal physiologic features and is therefore preferred to turbinectomy or surface methods. Coblation radiofrequency is not appropriate for patients with primarily bony turbinate hypertrophy or extremely narrow piriform apertures. The authors note that a disadvantage of the Coblation technique is that patients sometime feel the thermal effect during deep or more posterior turbinate reductions.

Bhattacharyya N, Kepnes LJ. Clinical effectiveness of coblation inferior turbinate reduction. Otolaryngol Head Neck Surg 2003;129:365-71.

Submucosal Diathermy for Chronic Nasal Obstruction Due to Turbinate EnlargementThis study was a retrospective review of the medical records of 91 patients who underwent submucosal diathermy (SMD) for nasal obstruction due to inferior turbinate hypertrophy that had been unresponsive to common medical treatments for at least a year. In all patients, SMD was the only procedure used. Patients were questioned before the procedure about nasal obstruction, chronic nasal discharge, snoring, headaches, and hyposmia or anosmia. An anterior and posterior rhinoscopic assessment and an airflow measurement using a Gertner-Podoshin nasal plate were performed preoperatively in each patient. The operation involved insertion of a diathermy needle into the anterior end of the inferior turbinate, advancement of the needle submucosally until the posterior end of the turbinate was reached, and withdrawal of the needle over a 30-second period with the current applied. The patients were evaluated 2 months and 1 year postoperatively by means of a questionnaire about breathing through the nose, rhinoscopic assessments, and airflow measurements using the nasal plate. There were no complications from the SMD procedure. At the 2-month examination, 64 of the 91 patients (70.3%) had subjective improvement in nasal breathing and 73 (80.2%) had good nasal breathing on the nasal-plate assessment. During the first postoperative year, a second opera-tion was performed in 16 patients because of unsatisfactory results from the initial procedure; these patients were excluded from the second evaluation. At 1 year postoperatively, 65 of the remaining 75 patients (86.7%) were symptom-free with respect to nasal breathing, and

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67 (89.3%) had good nasal breathing on the nasal-plate assessment. The authors note that SMD requires only local anesthesia, that it can performed in the office, and that it does not require expensive equipment. The authors conclude that SMD is a safe and effective technique for improving nasal breathing for both the short and long term in patients with chronically obstructive inferior turbinates.

Fradis M, Malatskey S, Magamsa I, Golz A. Effect of submucosal diathermy in chronic nasal obstruction due to turbinate enlargement. Am J Otolaryngol 2002;23:332-6.

Biopolar Radiofrequency Cold Ablation for Inferior Turbinate HypertrophyIn this prospective study, the Coblation® radiofrequency (ArthroCare) technique (set to a power of 6 and used for 1 to 6 passes of 10 to 20 seconds each) was used to reduce the inferior turbinates in 31 adult patients with symptomatic inferior turbinate hypertrophy unre-sponsive to medical management. In one patient, treatment was terminated prematurely because of pain; another patient had epistaxis requiring overnight packing. Postoperative pain was minimal; 12 patients said they had none. Most patients required minor debride-ment of crusting at the anterior turbinate head at their 2-week postoperative visit; no bleeding occurred after this procedure and no patient had substantial granulation tissue. Six weeks and 3 months after surgery, scores on the Rhinosinusitis Symptom Inventory were significantly lower than preoperative scores (P < 0.025) for all nasal symptoms except nasal congestion. One patient had recurrence of nasal obstruction. The authors note that the Coblation technique has the following advantages over electrocautery or monopolar radiofrequency reduction: the immediate tissue reduction allows the surgeon to assess the degree of turbinate reduction and further tailor the treatment approach; collateral tissue damage may be minimal, espe-cially compared with that associated with conventional electrocautery; and the procedure is rapid and well tolerated. The authors also comment that the Coblation technique has a defi-nite learning curve and that, in their series, adjustment of anesthesia practices was required to prevent pain during treatment. Moreover, some oozing from the turbinate entry point can be expected, and this led to their case of epistaxis.

Bhattacharyya N, Kepnes LJ. Bipolar radiofrequency cold ablation turbinate reduction for obstructive inferior turbinate hypertrophy. Oper Tech Otolaryngol Head Neck Surg 2002;13:170-4.

Radiofrequency for Turbinate HypertrophyIn a prospective study in 14 patients with chronic nasal obstruction unresponsive to medical treatment and no septic deformity, the authors used radiofrequency tissue reduction (S215 system; Somnus Medical Technologies) to treat inferior turbinate hypertrophy. Patients were placed under local anesthesia, and three punctures were made in each turbinate. The maximum values for temperature, power, local energy, and procedure duration were 85°C, 8 W, 350 J, and 2.5 minutes, respectively. Three patients had pain during the procedure; in two, treatment had to be stopped. None of the patients took any analgesic medication postopera-tively. Patients were evaluated before and on days 3, 7, and 60 after the procedure. Compared with preoperative findings, the abundance of secretions was increased significantly on day 3 and decreased significantly on day 60; turbinate edema was increased significantly on both day 3 and day 60. Assessments using a visual analogue scale showed a significant decrease in both daytime (P < 0.0005) and nighttime (P < 0.00001) nasal obstruction. Acoustic rhinom-etry showed a significant postoperative reduction in turbinate hypertrophy. Saccharine transit

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times decreased significantly by day 60, whereas values for ciliary beat frequency were not significantly different from those observed before surgery. The authors conclude that the radiofrequency method is a useful alternative for reducing turbinate volume while preserving the integrity and function of the surface epithelium. Patients should be informed preopera-tively about the temporary nasal blockage, rhinorrhea, and inflammatory reaction that may occur after the procedure.

Coste A, Yona L, Blumen M, Louis B, Zerah F, Rugina M, Peynègre R, Harf A, Escudier E. Radiofrequency is a safe and effective treatment of turbinate hypertrophy. Laryngoscope 2001;111:894-9.

Radiofrequency Treatment of Turbinate Hypertrophy: Randomized TrialThis randomized, single-blinded clinical trial compared radiofrequency volumetric tissue reduction (RFVTR) with a placebo procedure in the treatment of nasal obstruction in 32 patients with inferior turbinate hypertrophy. In patients assigned to the treatment arm, local anesthetic agents were administered, the RFVTR probe was inserted into the anterior end of the inferior turbinate until the active tip was submucosal, and delivery was accomplished with the setting of a target temperature of 75°, 15 W, and 500 J (Somnus Medical Technologies). The patients in the placebo group underwent the same procedure, including application of local anesthetics, but no energy was delivered. The sounds of the machine were preserved to simulate treatment. The results of treatment were evaluated with use of a visual analogue scale (VAS) completed by the patients before and 8 weeks and 6 months after the procedure. Each patient also responded to a survey about complications, including pain and bleeding, and underwent a nasal examination. Preoperatively, the treatment and placebo groups (n = 16 each) were comparable with respect to gender, race, age, allergy characteristics, and VAS scores. There were no major complications during or after any procedure. Four patients (two in each group) had mild to moderate pain during and shortly after the procedure; this was relieved by acetaminophen. Follow-up examinations showed no evidence of crusting, ulcer-ation, or surrounding mucosal damage. The inferior turbinates were appreciably smaller in most patients given RFVTR. Analysis of the preprocedure and 8-week VAS scores showed that both the treatment and placebo groups had significant postprocedure improvements in the three outcome measures analyzed: frequency of obstruction, severity of obstruction, and overall ability to breathe. However, the amount of improvement was significantly greater in the treatment arm than in the placebo group with respect to severity of obstruction and ability to breathe. Moreover, 100% of the patients in the treatment arm but only 44% in the placebo arm had improvements in all three outcome measures. Six months after RFVTR, the mean VAS scores for the treated patients assessed (including 12 from the placebo arm who chose to undergo RFVTR after the 8-week evaluation) were significantly better than the pretreatment VAS scores for all three outcome measures. The authors conclude that their study confirmed that RFVTR is a safe procedure that is easily performed in an office setting and that produces improvements in nasal obstruction significantly better than those provided by placebo.

Nease CJ, Krempl GA. Radiofrequency treatment of turbinate hypertrophy: a randomized, blinded, placebo-controlled clinical trial. Otolaryngol Head Neck Surg 2004;130:291-9.

Radiofrequency Volumetric Tissue Reduction for Turbinate HypertrophyThis prospective pilot study done at Stanford University evaluated the safety and effective-ness of radiofrequency volumetric tissue reduction (RFVTR) in the treatment of 22 patients

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(43 turbinates) with nasal obstruction and associated turbinate hypertrophy refractory to medical therapy. The study design limited application of RFVTR to the anterior third of the infe-rior turbinate. Preoperatively, all patients underwent anterior rhinoplasty with direct visual inspection of the anterior nasal cavity and grading (on a 5-point scale) of the severity of nasal obstruction at the anterior end of the inferior turbinate. Visual analogue scales (VASs) were used to evaluate nasal breathing and snoring preoperatively and to assess nasal breathing, snoring, pain, and patient satisfaction the day after treatment, 2 or 3 days after treatment, and 1, 4, and 8 weeks postoperatively. During the RFVTR procedure, a radiofrequency (RF) needle electrode was inserted submucosally into the anterior head of the anterior turbinate under direct vision. RF was delivered at 465 kHz for 60 to 90 seconds with a custom electrode, an RF generator, and a computer-controlled algorithm (Somnus Medical Technologies). Topical oxymetazoline was applied for hemostasis. Four patients (19%) had mild discomfort during the treatment, and two had numbness of the teeth. No bleeding, crusting, dryness, or foul odor occurred. Mild edema was observed on the first postoperative day and lasted up to 48 hours; it was not severe enough to block the airway but was correlated with a worsening of nasal obstruction for up to 48 hours after surgery. Postoperative pain was nonexistent or mild in 20 patients (91%); 3 patients required postoperative analgesia (acetaminophen). By 8 weeks after treatment, subjective nasal breathing had improved in 21 of the 22 patients and patient satisfaction with the therapy was high. There were also significant improvements in VAS scores for the degree and frequency of nasal obstruction and in the extent of obstruction determined by clinical examinations (P < 0.0001 for all differences between preoperative and postopera-tive findings). Snoring decreased in 12 of 13 patients and worsened in one. The authors note that RFVTR is safer than submucous diathermy or electrocautery partly because the tissue temperatures, power levels, and voltage required are much lower. They conclude that RFVTR has minimal side effects and achieves subjective improvement in patients with symptoms of nasal obstruction and that future investigations of this technique for managing turbinate hypertrophy are warranted and needed.

Li KK, Powell NB, Riley RW, Troell RJ, Guilleminault C. Radiofrequency volumetric tissue reduction for treatment of turbinate hypertrophy: a pilot study. Otolaryngol Head Neck Surg 1998;119:569-73.

Submucosal Bipolar Radiofrequency Ablation of Inferior TurbinatesThe aim of this prospective, nonrandomized study was to assess the efficacy and morbidity of bipolar radiofrequency thermal ablation (bRFTA; Coblation® system; ArthroCare) of the inferior turbinates in 20 adult patients with nasal obstruction caused by turbinate hyper-trophy. The ablation therapy was delivered at 100 kHz with a voltage root-mean-square value of 168 to 182. Preoperative and postoperative (1 week and 3, 6, and 12 months) nasal func-tions were evaluated with use of visual analogue scale (VAS) scores (for subjective results), olfactory thresholds, saccharine transit time, rhinomanometry, and acoustic rhinometry. No patient had mucosal edema, bleeding, or adherent crust formation after bRFTA treatment, although pain and nasal discharge commonly occurred for the first 2 days postoperatively. There were no adverse effects on nasal epithelial clearance time or olfactory functions. VAS scores for nasal discharge, itching, sneezing, and crusting showed a significant decrease after bRFTA (P < 0.001), whereas VAS scores pertaining to effectiveness (less frequent and less exten-sive nasal obstruction) and patient satisfaction increased significantly (P < 0.001). There were

no significant differences between preoperative and postoperative rhinomanometry or vaso-constrictive-effect results or between preoperative and long-term postoperative acoustic rhinometry results. The authors conclude that bRFTA is a safe, minimally invasive procedure for reducing turbinate volume without altering nasal mucosa or causing more than minimal pain. They note that their results were comparable to those achieved with other surgical treatments but that the “ideal” treatment for hypertrophied turbinates remains unclear. In contrast to bRFTA, laser cautery, cryocautery, and electrocautery require general anesthesia and can cause prolonged rhinorrhea, worsening of nasal obstruction due to edema, and crusting, all of which probably result from the depth of tissue injury, which is unpredictable with these methods.

Bäck LJJ, Hytönen ML, Malmberg HO, Ylikoski JS. Submucosal bipolar radiofrequency thermal ablation of inferior turbinates: a long-term follow-up with subjective and objective assessment. Laryngoscope 2002;112:1805-12.

RELATED TOPICS

Subjective Assessment of Unilateral Nasal ObstructionThe purpose of this study was to identify the minimum difference in unilateral airflow that can be reliably detected by a patient. The study enrolled 60 patients with a common cold (mean duration, 2.5 days) and included 120 unilateral measurements of nasal obstruction obtained by using posterior rhinomanometry to provide objective determinations of nasal flow and a visual analog scale (VAS) for subjective assessments. The data analysis included calculation of correlation coefficients.

Rhinomanometry showed that the range of total nasal flow in the study participants was 57 to 536 cm3 per second. On the VAS assessment, 77% of the participants correctly identified the more obstructed nasal passage. Among participants with a difference in flow between nasal passages of more than 100 cm3 per second (n = 22), 95% correctly identified the more obstructed nasal passage. On the other hand, only 66% of those with a difference of less than 100 cm3 per second (n = 38) could identify the more obstructed passage (P = 0.009 for the difference between the two participant groups). Moreover, as the difference in flow between the nasal passages decreased from 100 cm3 per second, the percentage of patients able to identify the more obstructed passage declined rapidly toward 50%, the proportion that would be expected through chance alone.

The authors conclude that in patients with a difference between nasal-passage flow of more 100 cm3 per second, otorhinolaryngologists can be confident that the patients’ complaint of unilateral nasal obstruction correlates with the actual side of obstruction. A lesser difference, however, indicates that the perception of nasal obstruction may be caused by other factors and that further investigation may be warranted to exclude other causes before a treatment option is chosen.

Clarke JD, Hopkins ML, Eccles R. How good are patients at determining which side of the nose is more obstructed? A study on the limits of discrimination of the subjective assessment of unilateral nasal obstruction. Am J Rhinol 2006;20:20-4.

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