Dialysis Catheter

Anatomy and Physiology

Hemodialysis Catheters

Site selection and image guidance: For temporary and tunneled hemodialysis catheters, ultrasound guidance is recommended to improve cannulation success and reduce mechanical complications. The right internal jugular vein is generally preferred due to a straighter course to the superior vena cava and right atrium; the left internal jugular is acceptable when the right side is unavailable, though certain outcomes (dysfunction/infection) may be inferior if the tip is not sufficiently deep.[3][4][5] Situations favoring left internal jugular placement include right-sided central venous obstruction, presence of right-sided cardiac devices, or prior right internal jugular surgical manipulation.

Subclavian access is avoided when feasible due to the risk of central venous stenosis, which can jeopardize future ipsilateral arteriovenous access. This association has been consistently reported since early case series and is reiterated in current guidelines.[6][3]

Tip position and catheter length: For internal jugular or subclavian insertions, optimal function is achieved when the functional tip lies at the mid-to-deep right atrium or cavoatrial junction, avoiding wall apposition and minimizing recirculation. Excessive depth should be avoided to prevent touching the base of the right atrium.[7] Catheter length for the right internal jugular is commonly approximately 15 cm (longer for the left internal jugular) and often greater than 20 cm for femoral catheters to reach the inferior vena cava. Observational data link left-sided catheters that terminate at the superior vena cava/cavoatrial junction (rather than deeper in the right atrium) with higher rates of dysfunction and infection; right-sided catheters are less sensitive to small variations in depth.[4] Electrocardiogram (ECG)-based intravascular electrocardiography is an alternative to fluoroscopy and is validated for confirming cavoatrial junction placement, except in patients with atrial fibrillation, pacemakers, or absent P waves.

Flow performance is governed by Hagen-Poiseuille principles (flow ∝ radius⁴ / length), underscoring the importance of adequate lumen caliber and keeping the catheter as short as practical while reaching the target.[8]

Peritoneal Dialysis Catheters

The target is the intraperitoneal space, with the distal tip typically directed toward the pelvis (rectovesical/rectouterine pouch) to optimize drainage. Preferred insertion through the rectus muscle reduces leaks and herniation and avoids injury to the epigastric vessels. With 2-cuff Tenckhoff catheters, the deep cuff should sit in the preperitoneal/rectus sheath, and the superficial cuff in the subcutaneous tract several centimeters from the exit site to promote tissue ingrowth and limit infection.[9] Adjunctive procedures such as omentopexy have been shown to reduce postoperative catheter migration and outflow failure. Recent reviews emphasize substantial variation in catheter type, insertion technique, and perioperative practices, reinforcing the need for individualized peritoneal dialysis access strategies.[10]

A 2024 network meta-analysis comparing 4 major peritoneal dialysis catheter types demonstrated lower rates of mechanical dysfunction and catheter migration with straight-tip designs such as Swan-neck + straight and Tenckhoff + straight configurations.[11]

Indications

Hemodialysis Catheters

Indications include urgent renal replacement therapy for acute kidney injury, decompensated chronic kidney disease without established access, and bridging while an arteriovenous fistula or graft matures or during access failure. For chronic hemodialysis, fistulas—and, where not feasible, grafts—remain preferable to chronic catheter dependence due to lower infection and thrombosis risk; however, KDOQI 2019 emphasizes individualized decisions based on the ESKD Life-Plan rather than rigid targets for catheter prevalence. Examples include patients with limited life expectancy, severe cardiopulmonary comorbidity precluding access to surgery, repeated access failure, or palliative dialysis plans.[12][3] 

Peritoneal Dialysis Catheters

Peritoneal dialysis requires catheter placement in advance of therapy. Peritoneal dialysis is particularly useful for patients with limited vascular access, those who are hemodynamically fragile, pediatrics, and individuals seeking home-based therapy. The International Society for Peritoneal Dialysis (ISPD) recommends planned peritoneal dialysis initiation with an approximately 2-week break-in period when feasible, while also recognizing urgent-start protocols that employ low dialysate volumes and supine exchanges when immediate therapy is required.[9]

Contraindications

Hemodialysis Catheters

Contraindications include local infection at the insertion site, known thrombosis or stenosis of the target vein, distorted anatomy, or vascular injury at the site. Coagulopathy is a relative contraindication that can be managed with correction and ultrasound guidance. Subclavian access should be avoided in patients who may require ipsilateral permanent access, as it carries a risk of central venous stenosis.[3][6]

Peritoneal Dialysis Catheters

Contraindications include a non-intact peritoneum (eg, recent major abdominal surgery or trauma), active intra-abdominal sepsis, and inability to maintain exit-site hygiene. Severe acute respiratory distress syndrome may worsen with diaphragmatic splinting from dialysate, although peritoneal dialysis can be feasible in select cases with low-volume supine regimens. Profound metabolic emergencies not rapidly correctable by peritoneal dialysis may favor extracorporeal therapies.[9]

Equipment

Hemodialysis Catheters

Dual-lumen catheters (with color-coded connectors—typically red for withdrawal and blue for return) are standard; triple-lumen variants include a third narrow lumen for medications or monitoring. Modern designs place withdrawal and return ports in staggered or symmetric arrangements to reduce recirculation. Tunneling, combined with a Dacron cuff, reduces the risk of infection compared with non-tunneled lines.[1]

A typical non-tunneled insertion kit includes local anesthetic, introducer needle or cannula with syringe, guidewire, scalpel, dilator(s), catheter, suture, heparinized or normal saline per protocol, sterile dressing, and, if applicable, ultrasound with sterile cover and gel.

Some centers use saline-only protocols to reduce bleeding risk or avoid heparin-induced complications, aligning with infection-prevention initiatives.

Peritoneal Dialysis Catheters

Tenckhoff catheters (straight or coiled) are soft silicone, typically cuffed (1 or 2), and inserted with a trocar, Seldinger technique, open mini-laparotomy, or laparoscopy. Laparoscopy allows adjunctive maneuvers, such as omentopexy, while percutaneous approaches offer minimal invasiveness but rely on operator experience and imaging.[2]

Personnel

Placement of non-tunneled catheters can be performed by a trained operator with appropriate monitoring and assistance. Tunneled cuffed lines and peritoneal dialysis catheters benefit from interventional radiology, interventional nephrology, surgery, or laparoscopy teams. Ultrasound guidance, along with fluoroscopy or validated electrocardiographic tip confirmation for tunneled catheters, enhances accuracy and safety. ECG tip confirmation is unreliable in patients with atrial arrhythmias, paced rhythms, or absent P-wave morphology.[3]

Preparation

Where feasible, informed consent should be obtained from the patient after explaining the benefits and risks of the procedure, and this should be documented appropriately in the medical notes. Intravenous access should be obtained, and monitoring should begin with ECG, blood pressure, and pulse oximetry. Internal jugular or subclavian vein catheters should be placed with the patient in the Trendelenburg position to reduce the risk of air embolism. The chosen insertion site is painted with an antiseptic such as povidone-iodine or 2% chlorhexidine. Clinicians must follow maximal sterile barrier precautions—cap, mask or eye protection, sterile gown and gloves, and a large drape—and use sterile ultrasound technique, when applicable. A sterile drape is placed on the patient so that the aperture exposes the chosen site. For peritoneal dialysis catheters, the patient should empty their bowels and bladder before the procedure. According to ISPD guidelines, a single pre-procedure prophylactic antibiotic dose, such as cefazolin, reduces the risk of early peritonitis and is recommended when not contraindicated.[3][9]

Technique or Treatment

Hemodialysis Catheters

Non-tunneled catheters: Under ultrasound guidance, the site is infiltrated with local anesthetic, and the vein is punctured with constant aspiration. The guidewire is advanced. A nick is made in the skin, the tract is dilated, and the catheter is then advanced over the wire. Clinicians should confirm the intrathoracic tip position post-procedure using a chest radiograph, if real-time fluoroscopy is not used, and the absence of a pneumothorax for internal jugular or subclavian approaches. The catheter is sutured and dressed. Real-time ultrasound significantly reduces placement failure and arterial puncture compared with landmark techniques. Vein localization using real-time, in-plane (long-axis) visualization improves needle tip control and reduces posterior wall puncture.[5]

Tunneled cuffed catheters: A subcutaneous tunnel is created from the chest exit site to the venotomy. Under fluoroscopy—or validated ECG-guided techniques where appropriate—the tip is positioned in the mid-to-deep right atrium, or at the cavoatrial junction, according to institutional standard, ensuring the withdrawal port is away from the vessel wall. The catheter is then secured and dressed.[3]

Tip positioning considerations: Observational analyses suggest that left-sided catheters perform best when the tip is positioned in the mid-to-deep right atrium. Left-sided catheters that terminate higher, such as at the superior vena cava or the cavoatrial junction, have higher rates of dysfunction and infection. Right-sided catheters are less sensitive to modest differences in tip depth.[4]

Peritoneal Dialysis Catheters

Percutaneous Seldinger (two-cuff Tenckhoff): The site is infiltrated with local anesthetic 1 to 2 cm below the umbilicus (midline). Blunt dissection is carried down to the linea alba, and a cannula is inserted into the peritoneal cavity, noting a loss of resistance. The cannula is advanced, and the peritoneal space is primed with warmed saline. A guidewire is passed inside, followed by a peel-away sheath. Fluoroscopic guidance during percutaneous placement may improve accuracy in anatomically complex abdomens. The lubricated catheter is inserted so the deep cuff is seated within the pre-peritoneal or rectus sheath, with the tip directed toward the pelvis. The sheath is then split and removed. A lateral exit site is fashioned with a subcutaneous tunnel, with the superficial cuff resting approximately 2 to 3 cm from the exit. The catheter is then sutured and dressed. [9]

Adjuncts: Laparoscopy allows adhesiolysis, omentopexy, and precise placement. Both percutaneous and open surgical techniques are acceptable when performed by experienced operators. ISPD guidelines recommend allowing an approximately 2-week break-in period after insertion to reduce leaks; for urgent-start peritoneal dialysis, low-volume supine exchanges should be used with careful monitoring. [9]

Complications

Hemodialysis Catheters

Mechanical complications: Mechanical complications include arterial puncture, hematoma, malposition, arrhythmias, pneumothorax/hemothorax (subclavian/internal jugular), and air embolism. The risk of these complications is reduced by ultrasound and image-guided insertion techniques.[5]

Dysfunction: Dysfunction may result from kinking, malposition, thrombus, or fibrin sheath formation around the catheter. Interventions include temporary line reversal, exchange over a wire, balloon disruption of a fibrin sheath (first-line in many centers), formal fibrin-sheath stripping for refractory cases, or catheter replacement.[13]

Infection: Catheter-related bloodstream infection (CRBSI) should be defined using CDC or KDOQI criteria to standardize diagnosis and reporting. CRBSIs and exit-site or tunnel infections increase hospitalization and mortality. Recent data on modern symmetric-tip non-side-hole tunneled catheters report CRBSI rates of approximately 0.76 per 1000 catheter-days, suggesting that updated catheter designs may modestly reduce infectious risk.[14] Evidence supports the use of comprehensive catheter care bundles, antimicrobial or antiseptic lock solutions—either antibiotic or non-antibiotic, such as citrate, EDTA, or taurolidine, depending on local policy—and antimicrobial barrier hub caps to reduce CRBSIs. A 2021 meta-analysis showed that both antibiotic and nonantibiotic antimicrobial lock solutions significantly reduce CRBSI compared with heparin. [15] However, recent high-quality randomized evidence found that a multifaceted catheter-care bundle did not significantly reduce CRBSI rates compared with baseline practice, emphasizing the difficulty of achieving further reductions in real-world settings.[16]

Central venous stenosis: This complication occurs particularly after subclavian catheterization and may compromise future arteriovenous access. Angioplasty can restore patency, although recurrence is common.[6][3]

Peritoneal Dialysis Catheters

Complications include bowel or bladder injury (rare, approximately 1% perforation), leaks, hemorrhage, malposition, omental wrapping, adhesions, and catheter blockage. Isotonic irrigation or urokinase may restore flow; forceful irrigation should be avoided to prevent catheter perforation or damage. Refractory cases may need laparoscopy and omentectomy.[17][10]

Peritoneal dialysis-related infections: Exit-site or tunnel infections and peritonitis remain major complications. The ISPD 2022 peritonitis update provides revised definitions, performance targets (≤0.40 episodes per patient-year; >80% patients per year free of peritonitis), empiric therapy guidance, and training or quality measures; the ISPD 2023 catheter-related infection update clarifies definitions, downgrades routine topical exit-site antibiotics to a context-specific recommendation, and outlines treatment durations and interventions, including cuff shaving or exit-site relocation.[18][19]

Clinical Significance

Material Compatibility and Care

Polyurethane catheters soften in vivo yet can be degraded by alcohols and some ointment carriers, whereas silicone is more flexible but may be weakened by iodine exposure. These considerations are important when selecting antiseptics and planning exit-site care. Petroleum-based ointments may degrade polyurethane, so they should be avoided; water-based agents are preferable.[1]

Tip Position and Outcomes

For tunneled internal jugular catheters, several studies suggest that left-sided catheters have a higher risk of dysfunction or infection unless the tip is placed mid-to-deep in the right atrium, supporting careful tip positioning—ideally under fluoroscopy or with validated ECG tip confirmation.[4]

Lock Solutions and Caps

Antimicrobial or antibiotic lock solutions, such as citrate, EDTA, taurolidine, or antibiotic-containing solutions, according to institutional protocol, reduce CRBSI compared with heparin lock solutions in meta-analysis. Center-wide implementation, together with antimicrobial barrier caps, sterile connection technique, and standardized hub disinfection, lowers infection rates and may be cost-effective. Selection of lock solutions should take into account antimicrobial stewardship principles and local resistance patterns. To support antimicrobial stewardship, nonantibiotic lock solutions, such as citrate and taurolidine, may be preferred for routine prophylaxis.[15]

ESKD Life-Plan

KDOQI 2019 reframes access targets into a patient-centered plan that emphasizes minimizing catheter exposure when possible while acknowledging clinical realities such as urgent starts, fragile vasculature, and palliative goals. Programs with robust infection-prevention and early access planning reduce catheter time and improve outcomes.[3]

Enhancing Healthcare Team Outcomes

Dialysis catheter care is inherently interprofessional, involving nephrologists, interventionalists, surgeons, nurses, pharmacists, and infection-prevention specialists. High-reliability practices include:

• Ultrasound-guided cannulation and image-guided tip positioning to reduce complications and dysfunction.[3][5][3]
• Bundles for insertion and maintenance, including maximal barrier precautions, chlorhexidine, hub disinfection, securement, dressing integrity checks, and standardized connection or disconnection, supported by regular auditing and feedback. Annual competency assessment of staff performing catheter manipulation further reduces infection rates.[3]
• CRBSI prevention strategies, such as antimicrobial lock solutions and, where adopted, antimicrobial barrier caps, aligned with antimicrobial stewardship.[15]
• Peritoneal dialysis program quality measures include tracking peritonitis and exit-site infection rates against ISPD targets; ensuring staff and patient training with periodic retraining; counseling on hygiene and pet exposure; and prompt response to contamination events.[18][19]

When clinicians minimize catheter dependence and adhere to robust infection-control measures, rates of catheter-related hospitalization and CRBSI improve.[3][20]

A strategic approach is equally crucial, involving evidence-based strategies to optimize treatment plans and minimize adverse effects. Ethical considerations must guide decision-making, ensuring informed consent and respecting patient autonomy in treatment choices. Each healthcare professional must be aware of their responsibilities and contribute their unique expertise to the patient's care plan, fostering a multidisciplinary approach. Effective interprofessional communication is paramount, allowing seamless information exchange and collaborative decision-making among the team members. Care coordination plays a pivotal role in ensuring that the patient's journey from diagnosis to treatment and follow-up is well-managed, minimizing errors and enhancing patient safety. By embracing these principles of skill, strategy, ethics, responsibilities, interprofessional communication, and care coordination, healthcare professionals can deliver patient-centered care, ultimately improving patient outcomes and enhancing team performance in the management of dialysis catheters.