PRACTICE SUPPORT DOCUMENT GUIDELINES TITLE HOME PARENTERAL THERAPY PROGRAM – PREVENTION AND TREATMENT OF UPPER EXTREMITY CATHETER-RELATED THROMBOSIS DOCUMENT # INITIAL APPROVAL DATE (Assigned by Department or Division) October 28, 2013 APPROVAL LEVEL INITIAL EFFECTIVE DATE Senior Leadership Team, Edmonton Zone October 28, 2013 SPONSOR REVISION EFFECTIVE DATE Home Parenteral Therapy Program, Edmonton Zone Month DD, YYYY CATEGORY NEXT REVIEW Health Care and Services October 28, 2016 OBJECTIVE This clinical guideline identifies strategies to reduce the occurrence of upper extremity catheterrelated thrombosis (UECRT) of the deep veins (i.e., brachial, axillary and subclavian) in patients receiving home parenteral therapy (HPT), and for all patients who require central venous catheters (CVCs)*. (*Includes tunneled catheters, implanted vascular access devices (IVADs), and peripherally inserted central catheters (PICCs) which are inserted for outpatient / home intravenous (IV) therapy.) APPLICABILITY This clinical guideline applies to all Covenant Health and Alberta Health Services employees, members of the medical and midwifery staffs, students, volunteers, and other persons acting on behalf of Covenant Health and/or Alberta Health Services (including contracted service providers as necessary) within the Edmonton Zone. This clinical guideline does not limit any legal rights to which you may otherwise be entitled. POINTS OF EMPHASIS • • Patients who have an indwelling CVC are at increased risk of developing catheter-related thrombosis in the deep veins of their arm and chest. UECRT has been assoiciated with several complications, adding to patient morbidity and potentially increasing patent mortality. The incidence of symptomatic UECRT varies from 0.3% - 28.3%, with many studies reporting 0 – 3.1%. The incidence of UECRT assessed by venography is reported to vary between 27% - 66%, with most (75%) being asymptomatic.47, 65, 39, 92 The incidence of pulmonary emboli in patients with clinically overt UECRT ranges from 15-25%, with an autopsy proven rate of 50%. 45, 49, 71 The attributable increase in cost and duration of hospitalization in patients with PICC-associated deep vein thrombosis (DVT) has been found to be an additional $ 15,973 (US) and 4.6 days. 90 • • As a new patient safety strategy, Accreditation Canada has created a Required Organizational Practice (ROP) for the prevention of thrombosis and prophylaxis of hospital patients who have specific risk factors for thrombosis. The America College of Chest Physicians Evidence-Based Practice (ACCP) Guidelines 8th Edition (2008) and 9th Edition (2012) recommends strategies for prophylaxis, diagnosis and treatment of thrombosis. The ACCP Guidelines, along with other annotated literature have been used to create the Edmonton Zone document which summarizes recommendations for prophylaxis, diagnosis, and treatment of UERCT and pulmonary embolism. Recommendations related to early patient assessment for appropriate venous access device, ongoing patient monitoring for complications, catheter characteristics and catheter placement techniques have also been gathered from both medical and nursing literature, and are included in this document. GUIDELINE 1. Complications of Upper Extremity Catheter-Related Thrombosis UECRT increases morbidity and the risk of mortality, and has been associated with severe complications 5, 9, 10, 17, 25, 27, 44, 45, 49, 68. Complications of UECRT • • • • • 2. Pulmonary embolism Brachial plexopathy Chronic venous insufficiency Loss of vascular access/catheter replacement Septic thrombophlebitis • • • • • Thoracic duct obstruction Post thrombotic syndrome Recurrent deep vein thrombosis Venous gangrene Superior vena cava syndrome Risk Factors for Upper Extremity Catheter-Related Thrombosis The risk of DVT increases with the number of risk factors present.10, 58, 60, 64, 68, 90, 92, 95 Abnormalities of Blood Flow Injury to Vessel Wall • • • • • • • • Venipuncture Catheter advancement Catheter tip rubbing on vessel wall Infusates that cause osmotic shifts in endothelial cell fluid Diseases that damage endothelial cells • • • Presence of catheter in the vein slows blood flow Stenosis caused by previous catheterization Immobility Hematologic Abnormalities • • Fluid volume deficits that increases blood viscosity Hypercoagulable states, e.g. cancer, pregnancy Genetic or acquired clotting abnormalities 2.1. CVC Associated Risk Factors The type and gauge of CVC, number of catheter lumens, insertion technique, difficulties with insertion, site of insertion, position of the CVC tip, as well as duration of CVC dwell time will either increase or decrease the risk of UECRT. 36, 43, 44, 49, 90, 92, 96 Increased Risk of UECRT • Multiple lumens • Tip proximal to distal superior vena cava (SVC) / right atrial junction Other mal-positioned CVC tips • References Decreased Risk of UECRT 8, 25, 47, 49, 60 • One lumen 8, 17, 19, 23, 24, 31, 32, 33, 34, 37, 37, 40, 41 • Tip located immediately proximal to right atrium at level of SVC / right atrial junction • • • Single insertion attempt Non-traumatic insertion Few peripheral IV catheters prior to CVC insertion • Right-sided entry 47, 49, 64, 67. 88,89, 90, 92, 96 • • • Multiple insertion attempts Vascular trauma Multiple peripheral IV catheters prior to CVC insertion • Left-sided entry (catheter rubs against proximal SVC as it is advanced past brachiocephalic vein, causing vessel wall trauma) • • Large gauge CVC Catheter takes up > 33% of vein volume 18, 49, 60, 67, 90, 92, 95 • • Small gauge CVC Catheter takes up < 33% of vein volume • Chemical phlebitis secondary to more thrombogenic CVC material: - polyethylene, e.g. Cook pressure monitoring set 25, 47, 49, 60, 62, 67 • CVC material less thrombogenic: - silicone, e.g. Bard, Groshong, Cook - polyurethane, e.g. Arrow, Bard - antithrombotic materials, e.g. Chloragard® • Chemical phlebitis secondary to irritant and/or vesicant medications or infusion solutions: - total parenteral nutrition - antibiotics, e.g. Vancomycin, Piperacillin -Tazobactam, Cloxacillin - hyper- or hypo-tonic electrolyte solutions - chemotherapeutic agents 9, 41, 92 • Non-irritant medications or infusion solutions: - normal saline - isotonic solutions • CVC infection 7,10, 82, 92 • • Sterile insertion technique Timely removal of CVC to prevent infection • Insertion of CVC by palpation and landmark technique 47, 50, 65, 66, 67 • Ultrasound-guided insertion of CVC 3, 18, 41, 49 3, 18, 25, 41, 43, 49, 89, 92 2.2. Patient-Associated Risk Factors Inherited and acquired risk factors for thrombosis combined with risks associated with the CVC play an important role in the development of UECRT. 36, 43, 44, 49 Inherited 8, 9, 3, 48, 68, 95 Acquired • • • Presence of CVC / pacemaker 3, 5, 9, 68 Malignancy (4.3-fold increase in risk) 3, 5, 8, 9, 33, 36, 41, 60, 62, 65, 66, 68, 89 , e.g. especially malignant processes involving right lung, lymph nodes, or other mediastinal structures where catheter thrombosis may occur due to central vein compression & thrombosis 92 Previous venous thrombosis &/or thromboembolism 3, 8,9, 20, 33, 36, 41, 60, 62, 66, 68 • Hypercoagulable states, 3, 41, 68 e.g. pregnancy and puerperium (10-fold increase in risk); 41 ; hormone therapy (2-4 fold increase in risk)8, 41, especially if patient on oral contraceptives or ovulation induction agents & has a concomitant prothrombin mutation or factor V Leiden deficiency 92; dehydration 41 Sepsis 3, 5, 41, 33 Bed rest 3, 8, 41, 33 Inflammatory bowel disease 33, 68 Congestive heart failure 41, 68 Chronic obstructive pulmonary disease (COPD) and (5, 33, 68) respiratory disease Recent surgery / trauma (6-22 fold increase in risk) 5, 8, • • • Advanced age 5, 8,33, 41, 62, 68 41 Renal failure / Nephrotic syndrome BMI ≥35 (8-fold increase in risk if undergoing surgery) 5, • • • • • • • • • • • • • • 20, 9, 68 13, 8, 9, 41, 68 Diabetes 5 33, 41 , e.g. connective tissue Autoimmune disorders disorders, rheumatologic disease 41 Myeloproliferative disorders 8, 41 Essential thrombocythemia Polycythemia vera 8, 41 Antiphospholipid syndrome 8, 41(50% of people with systemic lupus erythematous have antiphospholipid antibodies]) Paroxysmal nocturnal hemoglobinuria 8, 41 • • • • • • • Factor V Leiden deficiency: 3 to 8-fold increase in risk among heterozygous carriers and 50 to 80-fold increase in risk in homozygote (Caucasians only) Prothrombin G20210A mutation (Factor II mutation): 3-fold increase in risk (Caucasians only) Deficiency of natural coagulation inhibitors (10fold increase in risk in heterozygote), e.g. antithrombin deficiency, Protein C deficiency, Protein S deficiency Elevated clotting factors (2-3 fold increase in risk for those > 90th percentile) Antibody-positive heparin-induced 92 thrombocytopenia (HIT) Hyperhomocysteinemia (2-fold increase in risk) Dysfibrinogenemia 3. Risk Reduction Strategies Risks associated with inherited and acquired factors may be unavoidable. However, risks related to a CVC can be reduced by preventive actions taken by the healthcare team prior to and during insertion of the CVC. 6, 7, 8, 9, 36, 44, 46, 47, 52, 53 3.1. CVC Insertion a) Prior to CVC insertion • • • • • b) Identify patients at risk for thrombosis. Consult an anticoagulation specialist if thromboprophylaxis is being considered to avoid UECRT. Choose the most appropriate CVC type for each individual, i.e., use a tunneled internal jugular vein catheter for patients at high risk for thrombosis or any patient who may require an arterial/venous fistula in the future Choose the fewest lumens required for goals of therapy to be accomplished. Choose the smallest gauge to maintain adequate blood flow around the catheter. Consider an alternative device/insertion site if the required catheter will occupy more than 50% of the vein diameter. (Note: This may not be possible in infants and young children.) Consider ultrasonography if there is a prior history of UECRT and there is still a concern regarding clot resolution/vein patency. During CVC insertion • • • • • Insert CVC into a vein on the right side of the body, in order to reduce vessel trauma to the proximal SVC unless contraindicated by clinical condition or physiology. Use ultrasound guidance to visualize vein health and patency, and to reduce trauma from blind catheter insertion attempts. Place CVC tip at the level of the distal SVC / right atrial junction where it floats freely within the vein lumen, lies parallel to the vessel wall, and reduces catheter malfunction. For PICC insertions: use a micro-introducer technique, and place the PICC in a large vein above the antecubital fossa (i.e., basilic vein > cephalic vein). Most PICC products have a reverse taper at the insertion hub. Do not insert the reverse taper into the vein, as it may occlude the vein. 97 3.2. DVT Prophylaxis Routine DVT prophylaxis is not recommended for patients with CVCs. However, patients with certain clinical conditions and/or acquired/inherited DVT risk factors should be considered for DVT prophylaxis if they have a CVC inserted. Consult an anticoagulation specialist if a thrombophilic work-up and/or thromboprophylaxis is being considered. Cancer Patients at High Risk for DVT 55, 88 Medical / Surgical Patients at High Risk for DVT 5 • • Congestive heart failure or severe respiratory disease Prolonged immobility and who have one or more additional risk factors: - active cancer - previous DVT/PE - sepsis - acute neurologic disease - inflammatory bowel disease • • • • • • • Abdominal/pelvic surgery for malignancies Previous history of venous thromboembolism Bed rest for 4 days Advanced stage disease 60 years or older An acute medical illness Solid tumors Acquired / Inherited Thrombophilia Refer to Section 2.3. of this document. Note: (i) Follow prophylaxis as outlined in the 2008 and 2012 ACCP Guidelines: Prevention of DVT in non-surgical patients 4.2.1 - 4.4. 5, 88 (ii) For cancer patients and patients with cancer surgery-specific information follow Venous Thromboembolic Disease: Clinical Practice Guidelines in Oncology from the National Comprehensive Cancer Network Guidelines (2008) 55 and the 9th edition of Antithrombotic Therapy and Prevention of Thrombosis from the American College of Chest Physicians Evidence-Based Clinical Practice Guidelines. 88 a) Informed Consent for DVT Prophylaxis • • • For patients with a CVC who require DVT prophylaxis in the home/outpatient setting, an informed consent must be obtained and documented, as per Alberta Health Services/Covenant Health consent policy. This consent should include information regarding the risk of heparininduced thrombocytopenia (HIT) and its typical sequelae (e.g. new thrombosis, skin lesions). Patients with a CVC and receiving DVT prophylaxis while in the home/outpatient setting should be advised to seek medical attention if any complications occur. 3.3. Monitoring for Complications All patients with a CVC must be monitored for signs and symptoms of UECRT and other CVC-related complications. Many cases are asymptomatic, therefore, a high index of suspicion is required. Ongoing monitoring of the patient by the responsible physician and HPT team members, including Home Care is important for early identification of thrombosis, prevention of pulmonary embolus, and initiation of treatment. • • • Attending physician should assess and monitor for overt signs and symptoms of UECRT at each patient encounter. HPT and/or Home Care nursing staff must inform the responsible physician if symptoms of thrombosis and/or pulmonary embolus are suspected. When a CVC is inserted by a radiologist, another physician or a nurse, it is important to keep outcome data. This is well outlined in the Quality Improvement Guidelines for Central Venous Access 83 of the Society of Interventional Radiology (SIR) Standards of Practice Committee. These guidelines include suggested information for data collection, including indications for a CVC, success rate(s) of CVC placement, as well as complication rates and suggested thresholds for central venous access. Complications are also stratified by outcome. See Appendix A for recommended documentation of outcome data for the Edmonton Zone HPT Program. Signs and Symptoms of UECRT 44, 46, 17, 92 • • • • • • • • • • • • Persistent pain / tenderness along catheter course, arm, shoulder, neck, jaw or ear Erythema, induration &/or increased warmth along catheter course Palpable, tender venous cord Functional impairment, e.g. difficulty swallowing or turning head on CVC side or mobilizing arm and/or shoulder Feeling of ‘fullness in fingers’ or ring(s) too tight Edema of hand, arm, neck and/or shoulder compared to other arm Bluish discoloration or blanching of arm Visible collateral circulation or engorged vessels of arm, chest or neck on catheter side Fever Suppurative thrombophlebitis associated with severe local and systemic symptoms where patient may be toxic with bacteremia/fungemia Inability to draw blood from catheter and/or CVC occlusion Paradoxical systemic arterial embolization, e.g. cardiac septal defects, patent foramen ovale Note: In children, signs may be more subtle, e.g. occlusion of CVC. Constans et al 92, 93 developed a clinical prediction score for diagnosis of UECRT in a cohort of 140 patients and two separate validation cohorts with a total of 317 patients. Four key parameters were found to contribute to the clinical score. One point was attributed to each of these parameters and a risk score was generated. CLINICAL PREDICTION SCORE FOR UECRT 92, 93 • • • • Parameters Score Venous material * Localized pain in upper extremity Unilateral pitting edema of upper extremity Another diagnosis at least as plausible 1 1 1 Probability of UECRT by Score Rating -1 to 0 (low probability) 1 (intermediate probability) 2 or 3 (high probability) -1 * includes a CVC or access device in a subclavian or jugular vein, or a pacemaker Note: The clinical prediction score can be used as a guide to better evaluate a patient with suspected UECRT and to help to decide whether or not further investigations are needed. Low probability does not exclude a diagnosis of UECRT & does not mean that an ultrasound should not be performed. Signs and Symptoms of Pulmonary Embolus • Sudden onset chest pain and shortness of breath * • Sharp pleuritic chest pain with deep inspiration *Cough +/- bloody sputum production * • • Elevated heart rate and decreased oxygen saturation * Hypotension or cardiac arrest, especially if a large clot blocks outflow of blood from the right side of the heart (saddle embolus) Chest pain that lingers hours to days after the initial PE In children, signs and symptoms may be more subtle, e.g. occlusion of CVC • • * Often precede cardio-respiratory collapse. 4. Diagnosis of Upper Extremity Catheter Related Thrombosis and/or Pulmonary Embolism 4.1. Suspected UECRT 5, 12, 17, 44, 88 a) Combined modality ultrasound (compression with either Doppler or colour Doppler) to rule out UECRT. In children, these tests are often insensitive, but can start with ultrasonography if child is stable. 91 b) If Venous Duplex Doppler study is negative, and there is still a clinical suspicion of UECRT, consider serial ultrasounds, traditional venography, CT venography or Magnetic Resonance Angiography/Venography. c) If there is a high suspicion of thrombosis, begin treatment with low molecular weight heparin (LMWH) or unfractionated heparin (UFH) as per the 2008 and 2012 ACCP Guidelines 5, 88, as soon as possible while waiting for the outcome of diagnostic tests. Start therapy with Vitamin K antagonist (Warfarin) on Day 1. d) In the pediatric age group, LMWH may be the agent of choice given the challenges of using Warfarin in this age group. However, predictability of anticoagulation effect is reduced compared to adults 88. Consultation with an anticoagulation specialist is recommended in this situation. 4.2. Suspected Pulmonary Embolism 5, 14, 17, 88 Of the 600,000 patients who develop a DVT, 50,000-200,000 will die of a PE every year in the United States of America. a) Computerized Tomography (CT) of the chest with angiography or magnetic resonance imaging (MRI), e.g. magnetic resonance venography (MRV), for patients considered at high risk for a PE or if there is a high clinical suspicion of PE. The sensitivity and specificity of these tests in children has not yet been determined. b) Begin anticoagulation therapy prior to and while awaiting results of investigations, including children with a high suspicion for PE and/or who are unstable. For children, consultation with an anticoagulation specialist is recommended. c) High Sensitivity D-Dimer Assay • Intermediate risk for PE: begin anticoagulation therapy if test results will be delayed for 4 hours. • Low risk for PE: do not treat unless results of testing are not expected within 24 hours. If the test is normal, then the likelihood of PE is very low. Note: D-Dimer assay is not specific for blood clots in the lungs and can be positive for a number of reasons, including pregnancy, trauma or surgery within last 4 weeks, and/or acute infection. There is no data to support the use of D-dimer testing in the pediatric age group. d) Consider admission to hospital of all patients with high clinical suspicion for PE. 5. Management of Confirmed Upper Extremity Catheter Related Thrombosis and/or Pulmonary Embolism 5.1. Management of Confirmed UECRT a) Patients with an UECRT that involves the axillary or more proximal veins are at increased risk of death from thromboembolic complications. Anticoagulation must be started as soon as possible and according to the 2012 ACCP Guidelines 88, 92: • Early anticoagulation prevents clot propagation, facilitates maintenance of venous collaterals, prevents PE, and prevents long-term sequelae of chronic venous insufficiency 29, 17. b) Patients with UECRT of distal veins, i.e., basilic or cephalic, are not at increased risk of death from thromboembolic complications, unless there is proximal propagation of the thrombus. In this situation: • Consider anticoagulation therapy if patient is symptomatic and there are no contraindications to anticoagulation. • If anticoagulation therapy is not initiated, the patient should be followed clinically. If symptoms develop or do not resolve, repeat Venous Doppler (in 2-3 days for children) to ensure that there is no clot propagation. • If there is evidence of proximal extension of the clot, anticoagulation therapy should be initiated. c) Start treatment doses of low molecular weight heparin (LMWH), or fondaparinux over unfractionated heparin (UFH) as per 2012 ACCP Guidelines 88, as soon as possible and continue for 5 days or until INR is greater than 2.0 for 24 hours. Start therapy with Vitamin K antagonist (Warfarin) on Day 1 and treat for a minimum of three months, or for as long as the CVC remains in place, whichever is longer. d) Consultation with an anticoagulation specialist is recommended. For children 16 years of age and under, consult the Edmonton Zone KIDCLOT Pediatric Thrombosis Team. e) Monitor Warfarin doses and INR, or refer patient to an anticoagulation clinic. f) g) h) If necessary, leave CVC in place. The 2012 ACCP Guidelines 88 recommend that, in most cases, the CVC may remain in situ, if it is still required. • Recent studies have identified that CVC removal and replacement puts the patient at risk for developing a second UECRT. If CVC is no longer necessary and UECRT is present: • In adults, CVC may be removed after anticoagulation has been initiated. • In the pediatric age group, maintain anticoagulation for 3-5 days before removing the CVC. 88 The patient/guardian must be informed about the risk of embolization during or immediately following CVC removal, including signs and symptoms of pulmonary embolism, and to seek immediate medical attention if this should occur. Admission to hospital may or may not be required, depending on clinical condition. i) 5.2. 5.3. In all patients with clinically confirmed UECRT, obtain and document informed consent from patients who receive heparin anticoagulation therapy in the outpatient setting, including: • risk of heparin-induced thrombocytopenia (HIT) and its typical sequelae (e.g. new thrombosis, skin lesions). HIT is extremely rare in children (<0.01%); • need to seek medical advice if any complications occur. Management of Complicated Confirmed UECRT a) Patients with a confirmed UERCT and the following complications should be admitted to hospital for further evaluation and consultation with an anticoagulation specialist and/or vascular surgery: • failure of therapy • severe symptoms of UECRT with evidence of clot progression • occlusive thrombus of chest vessels, e.g. subclavian vein or superior vena cava, with or without superior vena cava syndrome. b) In addition to anticoagulation therapy, these patients may require catheter extraction, surgical thrombectomy, transluminal angioplasty, or a staged approach of lysis followed by a vascular interventional or surgical procedure 88 . Management of Pulmonary Embolism In 90% of cases, death following a PE occurs within one hour. Therefore, management is aimed at preventing a repeat PE and not treatment of the initial embolus. In adults, the risk of PE with upper extremity DVT ranges from 8% 50%. 10, 49 There is little data available in the pediatric age group. a) Referral of patient to an anticoagulation specialist is recommended. b) Begin short-term treatment with LMWH, or fondaparinux over UFH. Initiate a Vitamin K antagonist (Warfarin) together with LMWH, fondaparinux or UFH on the first treatment day. There is little safety and efficacy data available for use of fondaparinux in children. c) All patients should undergo rapid risk stratification, including the need for thrombolytic therapy. For patients with evidence of hemodynamic compromise, the 2008 and 2012 ACCP Guidelines 5, 88 recommend thrombolytic therapy, unless there are major contraindications owing to bleeding risk. 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Unpublished research, July 2013 Recommended Data Collection for PICC Outcome Studies - 1 Date Patient Name dd/mm/yy Last, First Age Gender Inpatient Home Parenteral Therapy M/F Immunosuppression Y/N Outpatient APPENDIX A TPN Anticoagulation Heparin Coumadin Reason(s) for PICC ASA LMWH Blood Work Other Hgb WBC Platelets Other Rx of Infection: Y/N If yes, type of Infection: Recent Surgery Creatinine /GFR Other Y/N If yes, indicate type of surgery: If yes, indicate type of immune suppression: Activity Level Bedridden Moderate Independent Previous PICC Y/N Date: Side: Comorbidities Atrial Fibrillation Collagen Vascular Disease (e.g., RA, SLE) CHF Diabetes Inflammatory Bowel Disease Malignancy Obesity Previous DVT Sepsis Other Recommended Data Collection for PICC Outcome Studies - 2 Positive Blood Cultures at Time of PICC Insertion Site of PICC Insertion Y/N R/L Arm If yes, Indicate organism(s) isolated: Vein Used to Insert PICC Length of PICC After Insertion Brachial Internal: Basilic External: PICC Type (e.g., Groshong, Power PICC, other) PICC Lot No. Gauge of PICC Cephalic Pending Vein Size Small (0 – 34 mm) Normal (35 – 44 mm) Process of Venipuncture for PICC Insertion (Normal or Difficult) Large (> 45 mm) Venipuncture N/D Advancement N/D Comments: Need for Patient Sedation Prior to or During PICC Insertion Y/N Healthcare Professional Inserting PICC & Date of Insertion Name: If yes, indicate type of sedation: Department: Date: PICC-Related Complications PICC Interventions e.g., pneumothorax, hematoma, phlebitis, arterial injury, thrombosis, plugged PICC, procedure-induced sepsis, other Y/N If yes, indicate type of complication: Declotted Repaired Removed & Replaced Date of PICC Removal No. of Days PICC Remained In Situ Comments