A Quinton catheter is a type of central venous catheter designed primarily for hemodialysis. It allows blood to be drawn out of the body, filtered through a dialysis machine, and returned, all through a single catheter placed in a large vein. The name comes from Quinton Instrument Company, which pioneered early dialysis catheter designs. These catheters are most commonly used as a short-term or emergency solution when a patient needs dialysis quickly and doesn’t yet have a more permanent access point.
How the Catheter Works
The Quinton catheter uses a dual-lumen design, meaning it has two separate channels inside a single tube. One channel pulls blood out of your body and sends it to the dialysis machine, while the other returns the cleaned blood. This two-channel setup allows dialysis to run continuously without needing two separate needle sticks or catheter sites. Early studies comparing dialysis catheters found that the Quinton-Mahurkar dual lumen design delivered high blood flow rates, low resistance, and minimal recirculation (where cleaned blood gets pulled back into the machine instead of flowing through your body).
The catheter itself is typically made of polyurethane, a material that starts out stiff at room temperature but softens once it’s inside your body. This flexibility reduces the risk of damaging blood vessel walls after placement.
When It’s Used
The most common reason for placing a Quinton catheter is that someone needs dialysis right away. Unlike an arteriovenous (AV) fistula, which is the preferred long-term dialysis access but requires surgery and weeks to mature before it can be used, a catheter works immediately after insertion. That makes it essential in several situations:
- Acute kidney failure: When the kidneys shut down suddenly and dialysis must start within hours.
- Bridge to permanent access: When a patient is waiting for an AV fistula or graft to be created and heal.
- Failed permanent access: When a fistula or graft has stopped working and a temporary solution is needed.
- Elderly or complex patients: When other access options aren’t feasible due to poor vein quality or other medical conditions.
Clinical guidelines recommend that fewer than 10% of chronic hemodialysis patients rely on catheters for ongoing treatment. AV fistulas remain the gold standard because they carry significantly lower infection and complication rates. But for patients who can’t get a fistula, a catheter may serve as the primary access for months or longer.
Where It’s Placed
Quinton catheters are inserted into one of three large veins: the internal jugular vein in the neck, the subclavian vein beneath the collarbone, or the femoral vein in the groin. The internal jugular is the most common choice because it has reliable anatomy, works well with ultrasound guidance, and carries relatively low complication rates.
The subclavian vein offers lower infection and clotting risks but carries a small chance of puncturing the lung during placement. The femoral vein is sometimes preferred in critically ill patients because the groin area stays clear of breathing tubes and chest monitors, but femoral catheters have higher rates of deep vein thrombosis and bacterial colonization in adults.
Placement uses the Seldinger technique, a standard approach that has been in use since the 1960s. A needle is guided into the vein (typically with ultrasound), a thin guidewire is threaded through the needle, the needle is removed, and then the catheter is slid over the wire into position. The whole procedure can be done at the bedside without a trip to the operating room.
Non-Tunneled vs. Tunneled Versions
The term “Quinton catheter” can refer to both non-tunneled and tunneled designs, though it’s most often associated with short-term, non-tunneled catheters. Understanding the difference matters because it affects how long the catheter can stay in and what risks come with it.
Non-tunneled catheters go directly from the skin into the vein. They’re stiff, tapered, and quick to place at the bedside. They’re meant for days to a few weeks of use. Blood flow rates tend to be somewhat lower than tunneled catheters, but they’re adequate for effective dialysis.
Tunneled catheters, like the Quinton PermCath, take a longer path. They enter the skin several inches away from the vein, travel through a tunnel under the skin, and then enter the blood vessel. This tunnel serves two purposes. First, it creates distance between the skin entry point and the bloodstream, which helps reduce infection. Second, tunneled catheters have a small polyester cuff embedded in the tunnel that encourages scar tissue to grow around it. This cuff anchors the catheter in place and acts as a physical barrier against bacteria migrating along the catheter toward the blood. Tunneled catheters are built for weeks to months of use and come in several tip designs, including step-tip, split-tip, and symmetrical configurations.
Infection and Complication Risks
The biggest concern with any dialysis catheter is infection. Patients using dialysis catheters face roughly seven times the risk of bloodstream infection compared to patients with AV fistulas. The skin around the insertion site harbors bacteria, and any break in sterile technique during dialysis hookups or dressing changes can introduce those organisms into the bloodstream. Infection risk climbs noticeably after five to seven days of catheterization.
Where the catheter sits matters too. Femoral catheters have the highest colonization rates, especially in patients with obesity. Internal jugular catheters carry somewhat higher infection risk than subclavian ones, though the subclavian site has its own tradeoffs with mechanical complications.
Beyond infection, other potential complications include blood clots forming in or around the catheter, accidental puncture of the lung during subclavian placement (pneumothorax), air entering the bloodstream (air embolism), and the catheter shifting out of position. Using real-time ultrasound guidance during insertion substantially reduces these mechanical complications compared to the older landmark-based technique.
Daily Care and Maintenance
Between dialysis sessions, the catheter lumens are “locked” with a solution to prevent blood from clotting inside them. This typically involves filling each channel with a heparin solution (a blood thinner) at concentrations between 10 and 100 units per milliliter, depending on the catheter type. For tunneled catheters used long-term, this locking is done weekly when dialysis isn’t happening. Before and after each dialysis session, the catheter is flushed with saline using a pulsating technique, pushing the fluid in small, rapid bursts rather than one steady push, which is more effective at clearing the inside walls.
After blood products or thicker fluids pass through the catheter, a larger flush volume of about 20 milliliters is used to prevent buildup. The insertion site itself needs to be kept clean and covered with an occlusive dressing. If you have a Quinton catheter, you’ll be instructed to keep the site dry and to watch for redness, swelling, warmth, or drainage, all of which can signal infection.
What Removal Looks Like
When the catheter is no longer needed, or if it needs to be replaced, removal is a relatively quick bedside procedure. You’ll lie flat or with your head tilted slightly downward. The skin is cleaned, any sutures are cut, and you’ll be asked to hold your breath and bear down (or hum continuously) while the catheter is pulled out in one smooth motion. This breath-holding technique increases pressure in your chest veins and helps prevent air from being sucked into the bloodstream.
For tunneled catheters, the polyester cuff can make removal trickier. The scar tissue that grew around it may resist the pull, requiring a few attempts or slight changes in angle. If the catheter won’t come out or breaks during removal, a surgeon or interventional radiologist steps in. After the catheter is out, pressure is applied to the site for at least two to three minutes, and an airtight dressing goes on. You’ll be checked about 15 minutes later for any bleeding or swelling beneath the skin, and the dressing stays on for 24 hours.
When a Catheter Needs to Come Out Early
Certain infections demand immediate catheter removal rather than trying to treat through the existing line. If a bloodstream infection involves staph aureus, pseudomonas, or fungal organisms, the catheter is removed and a new temporary catheter is placed at a different site. For less aggressive bacteria, doctors may start antibiotics first and monitor symptoms for two to three days. If fever, chills, and other signs resolve and there’s no sign the infection has spread, the catheter can sometimes be swapped over a guidewire for a new one without needing a completely new insertion site. In cases where the catheter is kept in place, an antibiotic lock solution is instilled into the catheter after each dialysis session for 10 to 14 days to clear the infection from inside the lumen.