Central Line Management

Anatomy and Physiology

The basis for site selection for central venous access is determined by the patient’s anatomy, clinical factors, and the indication for the procedure. Central venous access can be achieved via the internal jugular, subclavian, or femoral veins.[6] Although any location can be viable, current evidence supports a subclavian approach; this site carries the lowest risk of infectious complications.[7] Prior studies have shown that the risk of catheter-related infections is highest when access is obtained via the femoral vein compared with other sites.[8][9]

Indications

Peripheral venous access is the best choice when there is a short-term need for access, adequate peripheral sites are available, and the patient has no specific indication for central venous access. Indications for central venous access include infusates incompatible with peripheral administration, a need for invasive hemodynamic monitoring, multiple infusions or infusion incompatibility, and parenteral nutrition.[10] However, the complications of central venous access increase hospital-related costs and patient mortality.[11] Frequent review of the central venous access bundles is encouraged to minimize complications. Routine care of the central venous catheter should occur whenever the catheter is manipulated, accessed, or used.

Contraindications

Central venous catheter placement is a routine but high-stakes procedure associated with both mechanical and infectious complications, many of which are influenced by patient factors, insertion technique, and site selection. Mechanical complications include arterial puncture (most commonly carotid during internal jugular access), hematoma formation, pneumothorax (particularly with subclavian access), hemothorax, air embolism, and catheter malposition. While bleeding after insertion is generally uncommon, patients with moderate-to-severe coagulopathy or thrombocytopenia are at increased risk, making these conditions relative contraindications to placement. When feasible, correction of coagulopathy should precede insertion; however, in unstable or critically ill patients, the need for emergent access may outweigh this risk. Additional site-specific considerations include avoiding areas with indwelling intravascular hardware (eg, dialysis catheters, pacemaker leads) due to the risk of device interference or thrombosis, and avoiding sites with overlying skin or soft tissue infection to reduce the risk of bacterial translocation and subsequent catheter-related bloodstream infection (CRBSI).

Infectious and thrombotic complications represent important delayed risks. CRBSIs can lead to sepsis, metastatic infections, and increased mortality, necessitating strict adherence to sterile technique and maintenance protocols. Thrombosis, including catheter-associated deep vein thrombosis, may present with limb swelling, catheter dysfunction, or pulmonary embolism. Importantly, not all complications mandate immediate catheter removal. In cases of insertion site infection, catheter dysfunction, or new-onset bacteremia, removal is generally recommended; however, if the patient requires ongoing critical venous access, the catheter may be temporarily maintained until alternative access is secured.[12] Similarly, catheter-related thrombosis alone is not an absolute indication for removal and may be managed with anticoagulation depending on the clinical context.[13] Effective management of central venous catheter-related complications, therefore, requires careful risk stratification, ongoing assessment, and care coordination to balance procedural risks with the patient’s hemodynamic and clinical needs.

Equipment

Sterile Insertion Practices

• Performance of good hand hygiene 
• Aseptic technique
• Maximal sterile barrier (hairnet, mask, gown, sterile gloves, full body drape)
• Preparation of the intended insertion site with chlorhexidine
• Securing the catheter with a suture or clamp
• Placement of a sterile dressing over the insertion site 

Routine Manipulation of the Central Line

• Cleaning with alcohol or chlorohexidine swabs
• Use of nonsterile nitrile gloves
• Soap and water or alcohol hand scrub
• Catheter hub locks

Sterile Dressing Change Requirements

• Hairnet
• Face mask
• Size-appropriate sterile gloves
• Chlorohexidine preparation
• Sterile gauze
• Biopatch or chlorhexidine-containing dressings 
• Transparent, sterile dressing

Personnel

A skilled clinician usually performs central venous catheter placement. Management of the central venous catheter is typically performed by skilled nursing or medical staff. Patients, such as those receiving home-based antibiotic infusions, should not manipulate or use the access site without adequate training in its use and care.

Preparation

Healthcare workers' hands may be contaminated with organisms from the hospital environment; therefore, hand hygiene remains important in reducing nosocomial and catheter-related infections.[14][15]

Standard insertion practices for central venous catheter placement have been developed.[16] Catheter dressing changes should be executed using a sterile technique.[17][18][19]

Technique or Treatment

During initial central venous catheter placement, using soap and water or alcohol-based scrubs should be standard practice before donning sterile gloves. Double gloving is encouraged, with a colored indicator glove worn underneath to identify any perforations in the gloves.[20] Using sterile drapes, gowns, and gloves, along with appropriate precautions, will help minimize catheter contamination during insertion.  

Both mechanical and chemical skin preparation should be used every time. A solution containing 0.5% chlorhexidine is preferable to povidone-iodine or 70% alcohol unless the patient has a chlorhexidine allergy. Skin preparation reduces skin flora and the risk of catheter-associated infections. After completion of the procedure, a sterile dressing should be applied over the insertion site before using the catheter.[8][17][18][14] 

After insertion, catheter manipulation should occur only when clinically indicated. Routine daily inspection of the central line should be performed. The inspection should evaluate the line's proper position and functionality. Additional attention should be directed at inspecting for signs of infection, including erythema and drainage. Dressing changes should occur every 5 to 7 days with a transparent dressing or every 2 days with a gauze dressing. However, the dressing should be changed sooner if it is no longer adherent to the skin, its integrity is compromised, or it becomes visibly soiled. Studies found no difference in the rate of catheter-related bloodstream infections between chlorhexidine-impregnated dressings and other dressings, such as adhesive Tegaderm™ HP Transparent Film Dressing (3M™), sterile gauze, and micropore tape.[11] However, limited data support the use of silver-impregnated dressings for nondialysis catheters.[21]

Once the dressing is removed, the catheter insertion site should be cleaned to prevent bacterial transmigration. Sterile technique should be used at all times when handling central catheters. A chlorohexidine solution is recommended to sterilize the area surrounding the catheter site. Once the area is dry, a sterile dressing should be reapplied and remain in place per institutional protocol or until the catheter is removed.[14] Prolonged use of adherent dressings can lead to allergic contact dermatitis and other skin injuries from repeated removal and reapplication. Early identification of skin irritation and injury will allow the team to make necessary adjustments to prevent future occurrences.[22]

Catheter connections also require sterile precautions. In addition to hand hygiene, the healthcare worker should diligently disinfect the injection ports, needleless connectors, and catheter hubs with either 70% alcohol or chlorhexidine swabs for 15 to 30 seconds before each use. Recommendations also include changing the intravenous (IV) administration set every 96 hours. If IV administration sets are used to infuse lipid-containing solutions and medications, such as total parenteral nutrition (TPN) or propofol, the sets should be exchanged every 24 hours. The IV set should also be changed every 24 hours if used to infuse blood products. When a catheter hub is not used, catheter locks should be applied, and antiseptic IV caps containing 70% alcohol should be considered to provide a continuous barrier that kills bacteria at access ports.[23][24]  

As previously mentioned, proper insertion and maintenance techniques prevent complications. Thus, many institutions implement central venous catheter bundles that highlight 5 critical concepts: hand hygiene, maximal sterile barrier precautions during insertion, skin cleansing with chlorhexidine, avoidance of the femoral insertion site when possible, and removal of any unnecessary catheters.[25] Despite these recommendations, resources may be scarce, which can affect institutional compliance and the variability in infection rates.[16][2]

Complications

Central venous catheter–related complications span the procedural (insertion) phase and the post-placement period, with risk modulated by technique, anatomy, and patient comorbidity. During insertion, the absence of real-time ultrasound guidance is associated with higher complication rates, including multiple attempts and inadvertent cannulation of adjacent structures.[26] Arterial puncture remains one of the most consequential errors and can progress to expanding hematoma, pseudoaneurysm, arterial dissection, or arteriovenous fistula formation, with potential compression of nearby neurovascular structures.[27] Cardiac arrhythmias are also well described, typically resulting from guidewire or catheter-tip irritation within the right atrium or ventricle, or from excessive advancement and malpositioning.[28] Additional acute mechanical complications include pneumothorax and hemothorax (classically with subclavian access), air embolism, thoracic duct injury (left-sided access), and catheter malposition into aberrant venous structures, all of which underscore the importance of ultrasound guidance, anatomic familiarity, and postprocedural confirmation of tip location.

Following placement, infectious complications are the most frequent and clinically significant. CRBSIs should be suspected in any patient with an indwelling line who develops fever, insertion-site erythema, swelling, purulence, leukocytosis, or hemodynamic instability. A comprehensive evaluation is required, and catheter removal should be strongly considered when infection is suspected or confirmed. Noninfectious late complications are also common. Catheter occlusion may result from malposition or migration, thrombotic occlusion, drug precipitation, or external mechanical factors; systematic inspection and troubleshooting are essential.[8] Catheter-associated thrombosis, most often in the upper extremities, can be clinically silent or present with limb swelling, dysfunction, or embolic phenomena; it may also serve as a nidus for infection or propagate if untreated.[29] Routine catheter removal is not universally indicated in cases of thrombosis; anticoagulation is the mainstay of therapy in appropriate patients.[30] Mechanistically, thrombosis may arise from fibrin sheath formation along the catheter surface or early intraluminal clot, with risk increased by prior catheterization, suboptimal tip position, catheter caliber, infusate characteristics, inadequate maintenance, and underlying malignancy. Mechanical occlusion can also occur from kinking, clamping, or external compression; if nonthrombotic causes are excluded and dysfunction persists, thrombolytic agents such as alteplase may be used. Preventive strategies include meticulous line care and routine flushing protocols. Intermittent locking with normal saline versus heparin shows minimal differences in efficacy, and flushing before and after medication administration is recommended to maintain patency.[30][31][32]

Clinical Significance

Central venous catheters are clinically indispensable in modern acute and perioperative care, enabling reliable delivery of vasoactive medications, hyperosmolar solutions (eg, TPN), chemotherapy, and long-term IV therapies, as well as antibiotic administration and longer hospital stays. Their use is particularly critical in hemodynamically unstable patients, those requiring vasopressor support, and in complex surgical or critical care settings where peripheral access is inadequate. Beyond access, central lines allow for central venous pressure monitoring and mixed venous sampling, which can inform fluid management and guide resuscitative strategies. However, their role in dynamic assessment has evolved with newer modalities.

However, the clinical significance of central venous catheters is tightly linked to their risk profile, particularly infectious complications. Routine catheter management is essential to reduce the incidence of CRBSIs, the most common and consequential complication. Secondary infectious sequelae, such as abscess formation, cellulitis, and bacteremia, contribute to increased morbidity, prolonged hospital stays, greater antibiotic use, and higher healthcare costs.[33] Accordingly, the decision to maintain a central line must be continuously reassessed. Indwelling catheters should not be viewed as benign once placed; rather, they represent a potential ongoing source of harm. Current best practice emphasizes prompt removal when the line is no longer clinically necessary or when there is concern for line-associated infection. Specifically, catheter removal is recommended in cases of suspected catheter-related sepsis or persistent bacteremia despite more than 72 hours of appropriate antimicrobial therapy, as retention in this context is associated with treatment failure and worse outcomes.[34] Thus, optimal use of central venous catheters requires not only technical proficiency in placement but also disciplined stewardship in maintenance and timely removal, balancing their substantial clinical utility against their inherent risks.

Enhancing Healthcare Team Outcomes

Effective central venous catheter use hinges on technical skill, standardized strategy, and disciplined interprofessional coordination. Physicians, nurse practitioners, and physician assistants are responsible for ultrasound-guided, sterile insertion, appropriate site selection, and confirmation of tip position, while anticipating patient-specific risks. Equally critical, maintenance and troubleshooting of central venous access are core competencies for all healthcare workers and must be performed routinely to prevent catheter-related infections and mechanical complications. Nursing staff leads day-to-day line care, including aseptic access, dressing changes, line flushing, and surveillance for early signs of infection, thrombosis, or dysfunction. Pharmacists optimize medication selection, compatibility, and infusion practices to reduce risks such as precipitation and catheter occlusion, and support antimicrobial stewardship when infection is suspected. A shared strategic emphasis on insertion and maintenance bundles (maximal barrier precautions, chlorhexidine antisepsis, standardized dressing protocols, and daily line necessity review) directly improves patient safety and outcomes.

High-performing systems depend on structured communication and continuous care coordination across the team. Every healthcare team member is responsible for reassessing the ongoing need for central access and ensuring prompt removal when it is no longer indicated, recognizing that unnecessary catheter dwell time increases the risk of complications. Routine, multidisciplinary evaluation helps ensure proper handling and adherence to best practices, while standardized handoffs and daily rounds facilitate early recognition and escalation of complications. Multidisciplinary team training is essential to ensure reliable implementation of care bundles, and ongoing monitoring with feedback loops is required to identify gaps and drive quality improvement in patient care.[5][25] Coordinated responses, such as rapid evaluation of suspected catheter-related infection with input from nursing, physicians, infectious disease specialists, and pharmacists, enable timely diagnostics, targeted therapy, and appropriate decisions regarding catheter retention or removal. This integrated, team-based approach enhances patient-centered care, reduces morbidity, and strengthens overall team performance.