Central Venous Catheter Management

Introduction to Central Venous Catheter Management

• Central venous catheters (CVCs) are associated with a risk of thrombosis, with a reported incidence of 4-8% symptomatically, but up to 66% when screened by venography, according to the Society for Healthcare Epidemiology of America (SHEA) 1
• The American College of Internal Medicine recommends that single-lumen PICCs be used unless multiple lumens are clinically necessary 1

Catheter Placement and Design

• Higher thrombosis rates occur when the catheter tip is positioned above the junction of the superior vena cava and right atrium 2
• Left-sided insertion significantly increases thrombotic complications compared to right-sided placement, with a higher risk of thrombosis, as recommended by the American College of Radiology 3
• Femoral vein placement has a higher thrombosis risk compared to jugular or subclavian sites, and should be avoided due to increased infection and thrombosis risk, as recommended by the Annals of Oncology guideline 2, 4, 4
• Triple-lumen catheters have a higher thrombosis risk than double-lumen designs, and the smallest gauge catheter possible should be used, as recommended by the American College of Radiology and the Annals of Internal Medicine 3, 1, 2
• External catheters have a higher thrombosis risk than implanted ports, and right-sided insertion is preferred over left-sided to reduce thrombosis risk, as recommended by the American College of Radiology, Clinical Nutrition, and Annals of Oncology guidelines 3, 5, 2, 4

Catheter Maintenance and Complications

• Catheter kinking creates flow disturbances that promote thrombosis, and pinch-off syndrome, compression of the catheter between the first rib and clavicle, can lead to thrombosis, especially with subclavian access 4
• Tight sutures can restrict catheter function and promote thrombosis, and inappropriate medication concentration, high pH or low pH solutions, and calcium phosphate precipitates can cause precipitation and thrombosis 4
• Lipid emulsions and high-osmolarity and high-protein nutrition formulas can promote thrombosis when administered improperly, and intraluminal clot, fibrin sheath, mural thrombosis, and venous thrombosis are types of thrombosis that can occur 4
• Regular flushing with 0.9% normal saline is recommended, rather than heparin, as recommended by the Annals of Internal Medicine guideline 1

Patient Risk Factors and Diagnosis

• Patients with cancer have a significantly higher thrombosis risk, especially those with active solid tumors, according to the National Comprehensive Cancer Network 6, 2, 4
• A previous history of venous thromboembolism (VTE) is a risk factor for catheter-related thrombosis, as stated by the National Comprehensive Cancer Network 6
• Poor peripheral venous access is a risk factor for catheter-related thrombosis, according to the Annals of Internal Medicine 1
• Patients with chronic kidney disease stage 3b or greater (eGFR <45 mL/min) should be considered for vein preservation for potential future hemodialysis access, as suggested by 7, 1
• Catheter-related thrombosis is often asymptomatic (only 0.5-28% of cases have symptoms), and clinical diagnosis is only possible in 40-47% of cases, making vigilant monitoring essential 4

Prevention and Management

• Use of ultrasound guidance during insertion is recommended, as suggested by the Annals of Internal Medicine guideline 4
• The catheter tip position should be at the junction of the superior vena cava and right atrium, as recommended by the Annals of Oncology guideline 4
• Midline catheters can be considered as an alternative for short-term therapy (10+ days), as suggested by the Annals of Internal Medicine 1
• For acute symptomatic thrombosis, consider thrombolytic therapy for acute cases (diagnosis <24h after symptoms), and for subacute/chronic symptomatic thrombosis, LMWH alone or followed by warfarin for 3-6 months 8, 4
• Therapeutic anticoagulation should be initiated for at least 3 months in patients with confirmed PICC-related DVT, with a target INR of 2-3 for warfarin, and low-molecular-weight heparin is preferred over warfarin for patients with cancer, as recommended by the Annals of Internal Medicine and the American College of Internal Medicine 1, 9

Infection Prevention and Control

• Sterile technique with hand hygiene, chlorhexidine with alcohol for skin antisepsis, and sterile transparent or gauze dressings should be used, as suggested by the World Health Organization (WHO) 1
• Dressings should be changed weekly or when wet, loose, or soiled, and the insertion site should be evaluated daily for signs of phlebitis, as recommended by the American College of Physicians 1
• Injection ports should be cleaned with 70% alcohol before accessing the system, as recommended by the MMWR Recommendations and Reports guideline 10
• Paired blood cultures should be collected from the catheter and peripheral vein if CRBSI is suspected, as recommended by the Annals of Oncology guideline 4
• Healthcare personnel should be properly trained in PICC care, as recommended by the Journal of the American College of Radiology and Clinical Infectious Diseases guidelines 3, 11
• Trained personnel should be designated for insertion and maintenance, as suggested by the MMWR Recommendations and Reports guideline 10

Recommendations for Catheter Site Selection