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    Review Article

    Peripherally inserted central catheters in infants and

    children indications, techniques, complications and

    clinical recommendations

    B. Westergaard, V. Classenand S. Walther-LarsenDepartment of Anaesthesia, Juliane Marie Centre,Copenhagen University Hospital Rigshospitalet,Copenhagen, Denmark

    Venous access required both for blood sampling and for thedelivery of medicines and nutrition is an integral element in the

    care of sick infants and children. Peripherally inserted central

    catheters (PICCs) have been shown to be a valuable alternative totraditional central venous devices in adults and neonates.However, the evidence may not extrapolate directly to older

    paediatric patients. In this study, we therefore review the indi-cations, methods of insertion and complications of PICC lines forchildren beyond the neonatal age to provide clinical recommen-

    dations based on a search of the current literature. Although theliterature is heterogeneous with few randomised studies, PICCsemerge as a safe and valuable option for intermediate- to long-term central venous access in children both in and out of hospi-

    tal. Insertion can often be performed in light or no sedation, with

    little risk of perioperative complications. Assisted visualisation,preferably with ultrasound, yields high rates of insertion

    success. With good catheter care, rates of mechanical, infectious

    and thrombotic complications are low and compare favourablywith those of traditional central venous catheters. Even in thecase of occlusion or infection, fibrinolytics and antibiotic locks

    often allow the catheter to be retained.

    Accepted for publication 16 October 2012

    2012 The AuthorsActa Anaesthesiologica Scandinavica 2012 The Acta Anaesthesiologica Scandinavica Foundation

    In

    the paediatric population, intravenous (IV)access represents a unique challenge. Small veinsand poor visualisation can make cannulation diffi-cult, and repeated venipunctures are often a sourceof significant stress in children requiring IV infu-sions over a prolonged time span.1

    Peripherally inserted central catheters (PICCs)have been used for decades in neonatal populationsfor intermediate- to long-term IV medical and fluidtherapy, where they have been associated with ahigh insertion success and a low risk of catheter-related complications.2,3 New materials, improved

    insertion techniques and a variety of catheter types,including low-diameter, high-volume catheters,have resulted in PICCs now being used increasinglyfor a variety of purposes in broader paediatric popu-lations. However, infants, as well as older children,may not be directly comparable with neonates inrespect to choice of IV access because of differencesin underlying conditions, immunocompetence,general activity level, size and location of availableveins, and, accordingly, feasible catheter diameters.

    The purpose of this study is to review the currentliterature concerning indications, methods of inser-tion and maintenance related to PICC lines in chil-dren beyond the neonatal age in order to providerecommendations for clinical practice. Special atten-tion is given to the topic of catheter-related compli-cations, which may play a deciding role in the choicebetween different IV devices.

    Methods

    A literature search was performed in PubMed using

    the search terms peripherally inserted central cath-eter OR PICC AND children, last updated on 19September 2012. Relevant original articles wereidentified, including observational studies, clinicaltrials and meta-analyses. Articles not written inEnglish were excluded, as were initially review arti-cles, case reports, studies concerning adult or neo-natal populations, and studies concerning othertypes of IV access. The latter were only consideredwhere no more relevant studies were available.

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    Acta Anaesthesiol Scand2012; :Printed in Singapore. All rights reserved

    2012The Authors

    Acta Anaesthesiologica Scandinavica

    2012 TheActa Anaesthesiologica Scandinavica Foundation

    ACTA ANAESTHESIOLOGICA SCANDINAVICA

    doi: 10.1111/aas.12024

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    Further studies were found by manually reviewingreferences, and key studies were subsequently con-

    sidered in the formulation of evidence-based recom-mendations. The presentation of local methods wasbased on the practices at our own institution.

    Indications for PICC in the paediatricpopulation

    PICCs may be indicated when intermediate- tolong-term IV access is needed for medications andfluid therapy, blood sampling or parenteral nutri-tion. Peripheral IV catheters (PIVs) have a shortpatency, and insertion sites may often become

    exhausted during extended IV therapy. Alternativesinclude conventional central venous catheters(CVCs) placed in the jugular or subclavian vein, orsurgically placed long-term central venous devices,such as tunnelled and cuffed CVCs (TCVCs) andimplantable venous port systems. While PICCs canoften be inserted with light or even no sedation, theinsertion of other central venous devices oftenrequires general anaesthesia during the procedure.Additionally, these procedures are associated with arisk of serious perioperative complications such aspneumo/haemothorax, air embolism or severe hae-

    matomas (summarised in Table 1). In one pilotstudy and one randomised controlled study, theauthors recommended considering the use of PICCsrather than PIVs in paediatric surgical patientsrequiring more than 410 days of follow-up IVtherapy.4,5 In these studies, PICCs were shown to becost-effective, associated with significantly greaterpatient satisfaction and resulted in fewer needlepunctures. Intermediate-term IV access is oftenrequired for prolonged antibiotic therapy, and

    several observational studies have documented thatPICCs are suitable in both inpatient and outpatient

    settings for up to 6 weeks.

    68

    Additionally, recentstudies have shown the value of PICCs even inlong-term treatment of oncological children.912

    PICCs were used for both infusion and blood sam-pling for maximum dwell times of 390575 days.Although manufacturers do not support blood sam-pling through smaller PICCs, a non-randomisedobservational study has shown that the use of 3French PICCs for repeated blood sampling is pos-sible without a significant increase in catheterocclusion.13

    ContraindicationsContraindications for PICC placement are few.Infection, burns or radiation damage at the insertionsite may increase the risk of catheter colonisation orbacteraemia, and make catheter securement diffi-cult. Local oedema may reduce venous visibility andinsertion success. Small, damaged or thrombosedvessels caused by previous catheter insertions orrepeated attempts at cannulation may hinder cath-eter placement. A recent retrospective study by Yanget al. showed that successive PICC insertions wereassociated with progressively increased difficulty of

    access.14

    Likewise, central thrombosis, stenosis, con-genital or idiopathic venous anomalies of the ipsi-lateral subclavian vein or of the superior vena cava(SVC) may hamper catheter advancement to thecorrect target position. Special consideration shouldbe given to children with chronic renal failure orend-stage renal disease. In these patients, other alter-natives should be considered in order to prioritisethe preservation of veins for the formation of anarteriovenous fistula for dialysis.

    Table 1

    Comparison of PICCs with other IV access devices.

    PICC PIV CVC TCVC orimplantable port

    Necessitate GA Sometimes Rare Always AlwaysSerious insertion complications Very rare No Potential PotentialSerious systemic complications Potential No Potential PotentialMechanical problems* Sometimes Often Sometimes Sometimes

    Patency Weeks Days Weeks MonthsCatheter cost +++ + ++ ++++Patient compliance ++ + + +++Necessitate surgical removal No No No YesInsertion difficulty Easy Easy Difficult Difficult

    *Occlusion, dislodgment, fracture.CVC, central venous catheter; GA, general anaesthesia; IV, intravenous; PICC, peripherally inserted central catheter; PIV, peripheralIV catheter; TCVC, tunnelled CVC.

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    PICC placement

    PICCs can be placed by a variety of trained person-nel, including anaesthesiologists, interventionalradiologists, paediatricians or specialised IV nurses.Insertion can be performed in a variety of settings,including bedside, in the operating theatre or in aspecialised angiography suite.1518 The veins of theantecubital fossa can often be identified visually orby palpation. Deeper veins can be visualised byhigh-resolution ultrasound (US)19,20 or by fluoro-scopic venography with contrast injected via a PIVdistal to the insertion site.18,2123 Assisted visualisa-tion significantly improves insertion success,15,24 andseveral studies have reported success rates of90100% using these techniques.911,18,21,22 No directcomparisons of fluoroscopy and US exist in thepaediatric population, and the choice of strategyshould reflect local organisation, resources andthe needs of individual patients. US is probablypreferable in most cases. It is easy to learn,transportable and provides good visualisation ofveins and adjacent structures. Even so, probe com-

    pression of the vein may impede puncture andadvancement of the guide wire. Fluoroscopy pro-vides superior visualisation of the veins in theirentirety including occlusions or collaterals. It is,however, limited to the angiography suite andrequires an increased radiation exposure, IV con-trast and an existing PIV.

    SedationMost children need to be sedated in order to reducepatient discomfort, to optimise the positioning of theinsertion arm and to keep it in place. There are many

    different sedation protocols,25,26

    but in the paediatricpopulation, it is necessary to individualise theanalgo-sedative strategy. Table 2 outlines a sugges-tion for strategies depending on the age of the child.Most sedation protocols include spontaneousbreathing with supplemental oxygen via the nasalroute or a laryngeal mask airway. With older chil-dren (>1012 years), it may be possible to performa PICC insertion using local anaesthesia alone.Options include eutectic mixture of local anaesthetic

    cream applied over suitable veins and/or infiltra-tion with lignocaine. Some children benefit frommidazolam pre-medication or inhalation of 50%

    nitrous oxide during the procedure.

    Vein selectionSuitable veins for PICC insertion include the basilic,brachial and cephalic veins of the arm (Fig. 1). Visu-alisation by US is generally easy 24 cm above theantecubital fossa (Fig. 2), where the indwelling cath-eter may cause less discomfort to the patient duringflexion of the elbow. The basilic and brachial veinsusually have a suitable size, making the puncture

    Table 2

    Sedation strategy for peripherally inserted central catheter placement.

    Age 68 years

    General anaesthesia Pre-medication, localanaesthesia, nitrous oxide

    Pre-medicationLocal anaesthesia

    Fig. 1. Veins of the right arm. The veins of choice for peripherallyinserted central catheter insertion has been marked in bold.

    PICCs in children

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    easier and probably lowering the risk of post-operative complications.11 Furthermore, their out-flow to the axillary vein is normally direct. Thecephalic vein sometimes ends in small collaterals inthe upper arm, making it difficult or even impossi-ble to advance the catheter to a central location. Onthe other hand, guide wire insertion into the basilicvein can be difficult in preschool children because oftheir elastic tissue and the deep localisation of thevein. Although the brachial vein is usually easy topuncture, it is situated close to the brachial plexusand the brachial artery, and therefore should bepunctured cautiously. Because of anatomical varia-tion, it may be advisable to evaluate cephalic, basilicand brachial veins along their full length up to theaxillary junction by US before puncture.

    Choice of catheterPICCs are made of silicone or polyurethane, thelatter being the material increasingly preferred bythe manufactures because of its greater flexibilitywhen customising the material to specific require-ments. Polyurethane provides the PICC withcomparatively greater wall strength, allowing theproduction of small-sized high-flow catheters withgreater inner lumina. In relation to complicationsafter insertion, there seems to be no difference

    between silicone and polyurethane catheters,although no randomised clinical studies comparingthe two materials have been conducted. PICC size ischosen according to vein dimensions and the age ofthe child (see Table 3). The ideal catheter seems to bea single-lumen, low-diameter, high-volume, poly-urethane catheter. Larger PICCs may increase theincidence of venous occlusion and thrombosis,although this has not been confirmed in randomisedstudies. Conversely, smaller catheters can causemore mechanical problems with luminal occlusionand other dysfunctions.27 Unless multiple ports areessential for patient management, single-lumencatheters should be preferred as they may be lesslikely to induce complications.6 PICCs with antimi-crobial coating have been developed. However, evi-dence is inconsistent regarding their preventiveeffect on catheter-related infections, and their usecannot currently be recommended.28

    Insertion procedurePICCs should be inserted by use of maximal barrierprecautions using antiseptic hand wash, sterile

    gown, gloves and a large sterile drape. The area ofinsertion is cleaned with 2% chlorhexidine in 70%isopropyl alcohol. The appropriate vein is cannu-lated with an IV catheter or the supplied needle(Fig. 3A). After removing the tourniquet, a guidewire is inserted into the vein (Seldinger technique Fig. 3B). The PICC is prepared by filling it withisotonic saline and cutting the catheter to the appro-priate length. The length is determined by measure-ment along the course of the vein to the SVC usingthe tape included in thepre-packed PICC set. A smallincision of the skin and subcutaneous tissue is made,

    and a dilator and peel-away introducer are threadedcautiously into the vein (Fig. 3C). The wire anddilator are removed, and the PICC is inserted via thepeel-away sheath. Difficulties in advancing the guidewire or the catheter centrally can often be overcomeby abducting the arm up to 90 degrees. Flexion of thepatients head forward and towards the ipsilateralshoulder reduces the risk of advancing the catheterintothe jugular veins. Before removingthe peel-awayintroducer, the catheter tip placement is controlled

    Table 3

    Choice of catheter size.

    Infants Age16 years

    Age610 years

    Children>10 years

    Catheter size (French) 23 34 4 45

    BAV MN

    BA BRV

    Fig. 2. Ultrasound of the arm veins. BAV, basilic vein; BA, bra-chial artery; BRV, brachial vein; MN, median nerve.

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    with fluoroscopy. This allows correction of non-central catheter placement or inappropriate catheterlength. PICC placement without fluoroscopic guid-ance requires manipulation in up to 85%of insertionsin order to achieve correct central tip placement.23

    Once the PICC is in place, the peel-away sheath canbe removed, and the catheter fixed in place (Fig. 3DE). The useof a suture-free securing device (StatLock,C.R. BARD, Inc., Covington, GA, USA) with a trans-

    parent dressing is preferred over tape or sutures. Areview by Frey and Schears cites randomised evi-dence showing a significant reduction in dislodge-ment and unplanned removals compared with tapedsecurement.29

    Catheter tip placementAcceptable catheter tip placement has been debatedintensively. However, several observational studiessuggest that non-centrally placed PICCs haveshorter patency and higher complication rates.10,30,31

    Thus, PICC insertion should aim to place the tip of

    the PICC in the distal part of the SVC or in the rightatrium. Tip location in the right ventricle must beavoided because of the risk of tachyarrhythmias andmyocardial lesion.23 The carina can be used as asimple landmark for appropriate positioning.Studies on cadavers have demonstrated that thecarina is located approximately 0.5 cm above thepericardial duplication as it transverses the SVC.32

    The position of the arm during insertion and subse-quent chest radiographs influences the tip loca-

    tion.33 During control of the tip position, the armshould be positioned in the natural position by theside with flexion of the elbow.

    PICC care and maintenance

    Careful post-operative management is vital to main-tain PICC patency and prevent complications.Aseptic technique and proper hand hygiene shouldbe observed during handling and the dressing and

    administration sets replaced at regular intervals orwhen soiled. Continual education of health-careworkers and parents has been shown to decrease theincidence of catheter-related blood stream infection(CRBSI) in CVCs.34 Several consensus guidelinesfrom national or international societies providedetailed recommendations for the care of centralvenous devices.3537 However, because few studiesdeal specifically with PICCs in the paediatric popu-lation, these recommendations are largely based onadult studies and studies dealing with differenttypes of CVCs.

    Complications

    The most common PICC-related complicationsinclude mechanical problems (occlusions, acciden-tal dislodgement, breakage or leakage of the cath-eter), infections (local or systemic), phlebitis andvenous thrombosis. The overall rates of complica-tions in paediatric populations are generally low buthave been reported in a number of studies ranging

    A B D

    C E

    Fig. 3. Peripherally inserted central catheter placement.

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    from 1.11 to 19.3 per 1000 catheter days, varyingwith the type of population studied and the clinicalsetting.612,3840 Comparisons between individualstudies are further complicated by dissimilar regis-tration of complications, as well as varying stand-ards of catheter care and maintenance. While somestudies focus on complications resulting in catheterremoval,9,10,12,39,40 Barrier et al. registered all com-plications in 1290 PICCs inserted for prolongedantimicrobial therapy in previously healthy, hospi-talised children. The overall complication rate wasas high as 19.3/1000 days, but only one-third wasclassified as serious, requiring antimicrobial treat-ment, removal or replacement of the PICC.6 Patientage

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    catheter blood or tip cultures.47 However, fewstudies exist to validate these criteria in children,and many studies use less rigorous criteria. Specialconsiderations in paediatric patients mean that it isnot always possible to remove or replace PICCs fortip culture, and difficulties in obtaining peripheralblood samples may render paired culture with cath-eter blood unavailable. Randolph et al. have pro-posed a set of modified diagnostic criteria forpractical purposes.48

    With these caveats, systemic infections havebeen reported at rates from 0.11 to 6.4/1000days.6,7,912,30,39,40,42,46 Using broader criteria, Advaniet al. surveyed 2592 PICCs in hospitalised childrenand found a systemic infection rate of 2.58/1000days. Significant risk factors included a dwell timeof over 21 days, catheter placement for parenteralnutrition, intensive care unit exposure and chronicmetabolic conditions. Children who previously

    had a PICC complicated by infection were also atincreased risk.46

    Levy et al. studied 279 PICCs placed in a tertiary-care paediatric hospital and reported a total rate of4.4 infectious complications per 1000 catheter daysrequiring catheter removal. While this includedcases of phlebitis (1.5/1000 days) and exit site infec-tion (1.17/1000 days), CRBSI was only reported at arate of 0.4/1000 days.39

    Exit site infection, usually defined as local ery-thema, tenderness or induration around the catheterexit site or purulent secretion from the catheter

    site, is reported at rates from 0.04 to 2.4/1000days.7,1012,39,40

    The pathogens most frequently identified inPICC-related infections are gram-positive cocci(coagulase-negative staphylococci, Staphylococcusaureus), while infections with gram-negative rods(Klebsiella pneumonia) or fungi (Candidaspecies) arealso common.39,42,46

    Treatment of CRBSI requires appropriate sys-temic antibiotics and may necessitate removal of thecatheter. However, the need for chronic catheterisa-tion, multiple catheters or difficult venous access

    can make it necessary to preserve the catheter. Inthis case, systemic antibiotics should probably besupplemented with the use of a lock solution tocounter biofilm formation in the indwellingcatheter.4951 Although the evidence is sparse specifi-cally regarding PICCs, the effect of antibiotic locksolutions is well documented for other types of IVdevices. Vancomycin, gentamicin and cefazolin arecommonly used,52,53 but no international consensusexists on the routine use of any antibiotic lock

    solution.54 Alternatively, disinfection with hydro-chloric acid can be effective.55,56

    Venous thrombosisA major concern in the use of all central venouslines is the risk of developing DVT. In children,more than 90% of DVT is risk-associated largelybecause of long-term indwelling central venousdevices.57 Even so, symptomatic PICC-relatedvenous thrombosis is rare, reported at rates rangingfrom 0 to 0.19/1000 catheter days in paediatricpatients.9,16,21,22,41,58 Risk factors include congenitalthrombophilia and a history of catheter occlusionand catheter-related infection.16,58 In a study onlong-term central venous devices including PICCs,Revel-Vilk et al. found that patients developing atleast one episode of both catheter occlusion andinfection had an increased risk of developing symp-tomatic catheter-related DVT (hazard ratio: 4.15;

    95% confidence interval: 1.214.4).

    16

    Other potentialrisk factors, including positive family history ofthrombosis, underlying haematological or oncologi-cal diseases prior DVT, as well as the size of thecatheter, number of lumina, a proximal tip locationand long insertion time have in some cases beenidentified in relation to regular CVCs.59 These find-ings have yet to be confirmed for PICCs in the pae-diatric population.

    PICC-related DVT may lead to infection, post-thrombotic syndrome or pulmonary embolism.However, the majority of current observational

    studies register only clinically symptomatic DVT,which probably leads to underdiagnosis. In a studyby Dubois et al., 214 children (age 018 years) withPICCs were screened systematically for venousthrombosis using US.58 Twenty cases of DVT ofvarying severity were found (3.85/1000 days). Nev-ertheless, despite three cases of complete occlusion,only one patient presented with clinical symptoms.Conversely, Bui et al. screened 33 of 41 children withcystic fibrosis. All had PICCs placed for antibiotictherapy. However, using Doppler US, the teamfound no cases of DVT at the end of the therapy.60 By

    comparison, the incidence of silent venous throm-bosis in traditional CVC is found to be as high as50% when patients undergo systematic screening.61

    The clinical significance of silent thrombosisremains unclear. Chance findings of tip or wallattached thrombi, or partial or total occlusions ofperipheral and central veins may occur duringroutine computed tomography, magnetic resonanceimaging or echocardiography. This leads to thedilemma of deciding whether treatment of these

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    findings is necessary or not. DVT in children is aserious complication, but the clinical practiceregarding prevention, investigation and treatmentof catheter-related occlusion/thrombosis variesgreatly between paediatric centres.62 Treatment withlow-molecular-weight heparin seems to be safe andeffective in cases related to traditional CVCs.6365

    These findings have not yet been replicated withpaediatric PICCs.

    Therapy of silent thrombosis depends on severalfactors, such as the size and localisation of thethrombus, the degree of venous occlusion, intercur-rent diseases and present coagulation status.

    Summary

    The literature contains a substantial number ofstudies concerning PICCs in the paediatric popula-tion. However, the majority of these are observa-

    tional studies with few randomised, controlledtrials, and comparison between studies is difficultbecause of marked heterogeneity in study popula-tions, study design and end points. Child immuno-competence, clinical setting and patterns of useprobably have a large impact on catheter patencyand the incidence of complications.

    Nevertheless, PICCs are emerging as a safe andvaluable option for intermediate- to long-termcentral venous access in children. They can be usedin both hospital and outpatient settings, and newtypes of PICC are being developed that may facilitate

    even broader indications and longer dwell times.PICC insertion is easy to learn, has very few seriousperioperative risks, and can often be performed inlocal anaesthesia and/or light sedation. The inci-dence of serious long-term complications seems tobe low and comparable with that of traditionalCVCs, although tunnelled or implantable long-termdevices may still be safer for long-term use.

    Based on these considerations, PICCs may beindicated for:

    Short- to intermediate-term IV access in children requir-

    ing IV therapy for 45 days up to several weeks (antibi-otics, total parenteral nutrition, frequent blood sampling)

    Long-term central venous access as an alternative to con-ventional long-term devices (TCVC or implantable port

    systems) in patients with significant coagulopathy or con-

    traindications to GA, such as significant comorbidity

    Temporary central venous access for injection of toxicmedications in oncology patients until a long-term device

    can be inserted (e.g., in children with cervical or medias-

    tinal pathology)

    Well-educated staff and the use of assisted visuali-sation improve insertion success and lower compli-cation rates, US being the most promising modalityfor the future. Meanwhile, new methods are emerg-ing to salvage infected or occluded catheters. Evenso, further evaluation of PICCs in the care of infantsand children by properly controlled and ran-domised clinical studies in the paediatric populationis desirable.

    Conflicts of interest: Proctor contract with Cook(lecture fee) Sren Walther-Larsen.

    Funding: No funding was obtained for thispublication.

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    Address:Sren Walther-LarsenDepartment of Anaesthesia, 4013

    The Juliane Marie CentreRigshospitaletBlegdamsvej 9DK-2100 CopenhagenDenmarke-mail: [email protected]

    B. Westergaard et al.

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