Reaching New Heights in Understanding Central Venous ...in Understanding Central Venous Catheter...
Transcript of Reaching New Heights in Understanding Central Venous ...in Understanding Central Venous Catheter...
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Reaching New Heights in Understanding Central Venous
Catheter ThrombosisLynn Manly, RN, CRNI®, VA‐BC, Clinical Director,
Navilyst Medical, Tarpon Springs, FL
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Top 4 Things to Know for CE1. Make sure your BADGE IS SCANNED each time you enter a session to
record your attendance. 2. Carry your Evaluation Packet with you to EVERY session.3. Pharmacists, Pharmacy Technicians and Nurses need to track their hours
on the Statement of Continuing Education Form as they go (the 2-page triplicate form, so press firmly!).
4. FOR CE: At your last session, total the hours and sign both pages of your Statement of Continuing Education Form. Keep the PINK copy for your records and place the YELLOW and
WHITE copies in your CE Envelope. Make sure an Evaluation Form is in your CE Envelope for each session
you attended (extra forms are available at the registration desk if you forgot to pick one up).
Write your name and unique ID number (six digit number at the bottom of your name badge) in the designated area on the outside of the envelope, seal it, and place it in the drop box located near the registration area.4/9/2012 2
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• Lynn Manly is Clinical Director for Navilyst Medical. The conflict of interest was resolved by peer review of slide content.
• Elected – Nominations and Bylaws Committee, Association for Vascular Access. Chair
• This content has been previously presented at the Infusion Nurses Society Gateway Chapter Meeting on August 24, 2011, in St. Louis, MO.
• Clinical trials and off‐label/investigational uses will not be discussed during this presentation.
4/9/2012 3
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• Identify 3 central venous catheter (CVC) related complications
• Recognize the prevalence and clinical relevance of 3 CVC‐related complications
• Examine in‐depth details of CVC‐related thrombosis
• Distinguish varying methods of managing catheter‐related thrombosis
Objectives
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Complications of Central Venous Catheters (CVCs)
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Catheter‐Related Infections1
There are three types of CR‐Infections1
• Bloodstream infection (BSI)– Sepsis or bacteremia
• Catheter colonization• Exit‐site infection
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Catheter‐Related Bloodstream Infections1,2,3
Prevalence and Relevance >5,000,000 Patients each year in U.S. with a central venous catheter1
~250,000Bloodstream infections each year3
~30-60,000Attributable mortality annually2
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How Often Do PICCs Cause CR‐BSIs?6,31
Prevalence and Relevance Approximately .5 – 2.2% of PICCs have CR‐BSIs
(per 100 catheters)
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Catheter‐RelatedThrombotic Occlusions
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Catheter‐Related Occlusions5,7,8
Prevalence and Relevance• Most common non‐infectious complication in the long‐term use of CVCs, and in particular, PICCs5,7
• Approximately 1 in 4 CVCs may become occluded8
• Occlusions may present as:– Partial or complete– Thrombotic or non‐thrombotic– Intraluminal or extraluminal
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How Do YOU Determine Occlusion?7
Prevalence and RelevancePotential indicators of catheter occlusion7
Inability to infuse fluids
Lack of free‐flowing blood return
Increased resistance when flushing
Sluggish flow
Frequent infusion pump alarms
Learn what YOUR prevalence and relevance are!.
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CVC‐Related Occlusions7,8
• Non‐Thrombotic Occlusions• Mechanical• Lipid or chemical aggregation• Precipitate
• Thrombotic Occlusions• Intraluminal
• Thrombus• Extraluminal
• Fibrin sheath• Mural thrombosis
Haire & Herbst, 2000; Herbst & McKinnon, 2001.
Prevalence and Relevance
Thrombotic58%
Non-Thrombotic
42%
Haire & Herbst, 2000; Herbst & McKinnon, 2001.
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Proteins bind to surface
Platelets and white cells adhere to proteins
Fibrinous sheath forms, 1 mm thickness within 24 hrs12
EXAMPLE OF FIBRIN FORMATION‐
How Do Thrombotic Occlusions Form?4,12
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What Role do Fibrin Sheaths Play in Thrombosis?4,9,12
• Development of sheath usually begins with endothelial injury (such as surgery, IV or CVC insertion) and localized thrombosis, followed by deposition of plasma proteins along the catheter wall and an inflammatory response with proliferation of smooth muscle, fibroblasts, and endothelial cells
• All catheters develop a fibrin sheath upon insertion
• Presence of a fibrin sheath alone may not be sufficient to cause either thrombosis or bloodstream infection
• May serve as the foundationfor thrombus development12
Fibrin sheaths may be linked to thrombus development
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Intraluminal Thrombotic Occlusions4,7,13
• Fibrin accumulation can initiate inside the catheter tip and is often the result of blood reflux into the catheter7,13
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• Fibrin formation may lead to a fibrin sheath or flap12
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Fibrin Sheath
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Intraluminal Thrombus
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Catheter‐RelatedDeep Vein Thrombosis (CR‐DVT)
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Deep Vein Thrombosis Awareness10,11
• Each year 200,000‐600,000 Americans suffer from Venous Thromboembolism (VTE), which includes Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE)11
• At least 100,000 deaths per year are directly related to VTE10
• VTE is the leading cause of preventable, in‐hospital deaths affecting more people annually than highway fatalities, breast cancer and AIDS combined10
• 74% of people surveyed have little or no awareness of DVT symptoms11
Prevalence and Relevance
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Correlation Between Infection, Occlusion and DVTs4,20,32
Infection is linked to occlusion and DVT4,32
• CVC placement provides a rich culture for bacterial growth because of foreign body response upon insertion of CVC– Biofilm layer develops that encloses and protects bacteria, which can lead to infection
• Post‐mortem evaluation of 72 cancer patients with CVCs showed a strong correlation between CR‐sepsis and CVC thrombosis– Fibrin layer present on ALL catheters – CR‐Thrombosis present in 38% of cases** ** 23% of these had sepsis ** No patients without CR‐
thrombosis had sepsis
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Venous Thrombosis Risks15
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Catheter‐Related Venous Thrombosis33,34
If a CR‐Venous Thrombus develops, between the catheter and vessel wall, it may:
• Lead to complete blockage of the vein
• Be a life‐threatening condition • Have potential complications including, but not limited to, pulmonary embolism
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Venous Thrombosis
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Collaterals
Thrombosis
Catheter Tip
Slide-courtesy of NIH, D.J. Mayo, RN
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Types of Upper Extremity DVT23
Approximately 10% of all DVT involve upper extremities (UEDVT)
• Primary (20%)
– Venous thoracic outlet syndrome
– Effort‐related thrombosis (Paget‐Schroetter syndrome)
– Idiopathic
• Secondary (80%)
– Catheter‐related thrombosis
– Cancer‐associated thrombosis
– Surgery or trauma of the arm or shoulder
– Hormone–induced coagulation abnormalities (i.e. pregnancy)
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PICC‐Related DVT Incidence Rates22
• Symptomatic PICC related DVTs
• 1‐4% incidence
• Asymptomatic + symptomatic PICC related DVTs
• Up to 38% incidence
• Median time to thrombus: 8 to 12 days
1‐4% Rate of Symptomatic PICC Related DVTs22
38% Rate of Symptomatic ANDAsymptomatic PICC Related
DVTs22Prevalence and Relevance
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Known Sequelae of UEDVT23,28
• Pulmonary embolism23
– Occurs in approximately 6% of patients
• Post‐thrombotic syndrome28
– Pain on standing– Limb edema– Lipodermatosclerosis– Skin changes (ulcers, eczema)– Secondary, superficial varicose veins– Non‐specific: clinical conditions other than DVT may result in similar
symptoms
• SVC Syndrome
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• Prior DVT25
• Catheter Diameter25,26
– Increased incidence of thrombosis with larger diameter catheters/smaller vessels (e.g., cephalic)
• Hypercoagulability/Anti‐coagulant use17,27
• Surgery Duration > 1 hour25
• PICC Duration/Length of Stay25
• Male Gender19Evans et. al CHEST 2010
Symptomatic DVT Rates
Risk Factors for CR‐UEDVT17,19, 25,26,27
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Inherent CVC‐Related Risk Factors for DVT14,16
• Virchow’s Triad illustrates the inherent risk factors that present with CVC placement, predisposing a patient to DVT14,16
1. Vessel wall injury2. Stasis 3. Hypercoagulable state
Virchow’s Triad
1. Stasis
THROMBOSIS
Hypercoagulability
Vessel Wall Injury
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• The endothelium is the thin layer of cells forming an interface between circulating blood in the lumen and the rest of the vessel wall. The endothelium provides a non‐thrombogenic surface.
• Disruptions in the endothelium may cause the thrombin cascade to become activated.
• PICC placement may cause a disruption to the endothelium.─ 21 G needle puncture (sometimes double wall)
─ Wire and sheath/ dilator trauma
─ Irritation caused by indwelling PICC
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The “tools” for PICC insertions can be a part of the ‘issue’
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Damage (thrombus, fibrosis) to cephalic vein due to previous PICCSlide-courtesy of Tom Vesely, MD
damage to cephalic vein
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Stenosis in Vessel
Stenosis and thrombosis of cephalic vein due to PICCSlide-courtesy of Tom Vesely, MD
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Why is Stasis a Risk for VT? Understanding Stasis and Poiseuille’s Law ‐Mathematical equation related to fluid flow and hemodynamics (blood flow)
• Fluid movement within a tube –movement near the edge moves slowly due to friction
• Fluid movement near center of the tube (vessel) moves more quickly
• A CVC displaces some of the faster‐moving blood AND creates turbulence
• A CVC also provides additional friction due to its own surface area
• Overall flow is reduced and a level of stasis results
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How are Devices Related to Venous Stasis?20
• PICC French size may contribute to venous stasis• Smaller devices in larger vessels are less likely to causes venous stasis
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Defects Responsible for Hypercoagulability21
Inherited Acquired Non‐Coagulant Factors• Activated protein C
resistance• Protein S deficiency• Protein C deficiency• Hyperhomocysteinemia• Prothrombin 20210A
allele• Dysplasminogenemia• High plasminogen
activator inhibitor• Dysfibrinogenemia• Elevated factor VIII
• Antiphospholipidsyndrome
• HyperhomocysteinemiaThrombocythemia
• Dysproteinemia• HIT• Estrogens
• Malignancy• Pregnancy• Bed rest• Surgery• Trauma
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CHEST Guidelines: Management of Acute Upper Extremity DVT
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Managing Catheter‐Related Thrombosis –Clinical Review30
Clinical Practice Guidelines
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Managing Catheter‐Related Thrombosis –Clinical Review30
8.1 For patients with acute upper‐extremity DVT we recommend initial treatment with therapeutic doses of low molecular weight heparin, unfractionated heparin, or fondaparinux, as described for leg DVT.
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1.1.3. For patients with acute DVT, we recommend initial treatment with low molecular weight heparin, unfractionated heparin, or fondaparinux for at least 5 days and until the INR is > 2.0 for 24 h.
1.1.4. In patients with acute DVT, we recommend initiation of Coumadin™ together with LMWH, UFH, or fondaparinux on the first treatment day.
Managing Catheter‐Related Thrombosis –Clinical Review30
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8.4.1. For patients with acute UEDVT,we recommend treatment with CoumadinTM for > 3 months.
8.4.3. For patients who have UEDVT in association with a central venous catheter that is removed, we do not recommend that the duration of long‐term anticoagulant treatment be shortened to < 3 months.
Managing Catheter‐Related Thrombosis –Clinical Review29,30
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8.6.1. In patients with UEDVT who have persistent edema and pain, we suggest elastic bandages or elastic compression sleeves to reduce symptoms of post‐thrombotic syndrome of the upper extremity.
Managing Catheter-Related Thrombosis –Clinical Review30
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Managing Catheter‐Related Thrombosis –Clinical Review30
8.4.2. For most patients with UEDVT in association with a central venous catheter we suggest that the catheter not be removed if it is functional and there is an ongoing need for the catheter.
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Summary of VT and DVT Management
• Guidelines and recommendations for VT and DVT management are available, but it is critical to consider each patient’s specific situation and treatment needs when determining management requirements.– Anticoagulant therapy– Thrombolytic therapy– Device management
• Catheter maintenance, removal or re‐placement
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Heighten your DVT awareness related to your home infusion
patients
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UEDVT –Time to Occurrence and Monitoring
• Most UEDVTs develop within the first 12 days post PICC placement
• Do not take blood pressures on PICC arm• Assess the entire limb, not just the insertion site
• Assess the entire patient for s/s of UEDVT
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PICC‐Related ThrombosisStudy Type Detection Thrombosis
Ng Prospective Symptomatic Clinical with US Confirmation
1.6%
Grove Retrospective PresumedSymptomatic
Ultrasound 3.9%
Chemaly Retrospective PresumedSymptomatic
US or Venogram
2.5%
King Retrospective Symptomatic Clinical with US Confirmation
2.0%
Cowl Prospective(PICC vs. SC)
Symptomatic Clinical with US Confirmation
7.8%
Gonsalves Retrospective Asymptomatic US Central Veins Only
7.0%
Abdullah Prospective Asymptomatic Venogram 38.5%
Allen Retrospective Asymptomatic Venogram 23.3%
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• Let this program be your stepping stone in heightening your awareness of DVTs and the relationship to PICCs
• Don’t stop here…..continue your quest.• Teach others!• Make this awareness your new mission in
doing the right thing!
Summary
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Learning Assessment Questions & Answers
Please refer to the NHIA Annual Conference & Exposition 2012 On‐Site Program for a brief
post‐test.
4/9/2012 50
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