A portacath (also called a port-a-cath or implanted port) is a small medical device placed under your skin that provides easy access to your bloodstream. It sits just below the collarbone and connects to a large vein through a thin, flexible tube. Once healed, it’s completely hidden beneath the skin, and healthcare providers can use it to deliver medications, draw blood, or give fluids without repeatedly searching for a vein in your arm.
How a Portacath Works
The device has two main parts: a small reservoir (about the size of a quarter) with a rubber-like top called a silicone septum, and a catheter, which is the thin tube that runs from the reservoir into a large vein near your heart. The reservoir sits in a pocket created just under the skin, typically below your collarbone on the right or left side of your chest.
When you need treatment or a blood draw, a nurse inserts a special needle through your skin and into the reservoir’s septum. This needle, called a Huber needle, has a slightly curved tip designed so it doesn’t damage the septum when it passes through. That design matters because the septum needs to reseal itself after every use, potentially hundreds of times over the life of the device. Once the needle is in place, medications flow from the reservoir through the catheter and directly into your bloodstream. When treatment is done, the needle comes out and the port sits quietly under your skin until next time.
Who Needs One
Portacaths are most commonly placed for people undergoing chemotherapy, but they’re used for a range of conditions that require frequent or long-term access to the bloodstream. These include:
- Cancer treatment requiring chemotherapy, which can damage smaller arm veins over repeated sessions
- Long-term IV antibiotics for serious infections
- Inflammatory bowel disease requiring IV nutrition or biologic therapy
- Kidney failure requiring dialysis
- Complex medical conditions that involve frequent blood draws or IV fluids
The core advantage is reducing the number of needle sticks you go through. If you’re facing months of chemotherapy with treatments every two or three weeks, plus blood draws before each session, your arm veins take a beating. Some chemotherapy drugs are also harsh enough to damage smaller veins, so they need to be delivered into a larger one. A port solves both problems.
How the Port Is Placed
Placement is a minor surgical procedure, usually done under sedation or general anesthesia. You’ll be lying on your back with your head turned away from the side being used. The surgeon numbs the area below your collarbone with local anesthetic, then makes a small incision to create a pocket for the reservoir. A nearby vein (usually the subclavian or internal jugular) is punctured, and the catheter is threaded through it until the tip sits in the large vein just above or at the entrance to the heart.
Ultrasound often guides the vein puncture, and X-ray imaging may be used during the procedure to confirm the catheter is positioned correctly. The reservoir is then connected to the catheter and tucked into the pocket. The incision is closed with stitches or surgical glue. The whole procedure typically takes under an hour, and most people go home the same day.
You’ll have some soreness and bruising around the site for a week or two. During that healing period, you’ll need to keep the area dry and avoid raising your arm above your shoulder on that side.
Portacath vs. PICC Line
If you’ve been offered a port, you may have also heard about PICC lines, which are another type of long-term IV access. A PICC line is a catheter inserted through a vein in your upper arm, with the external end visible and hanging outside your body. A portacath, by contrast, is entirely under the skin.
That difference has real consequences. In a retrospective study comparing the two in cancer patients, PICC lines had nearly double the infection rate of ports (11.9% versus 6.4%) and higher rates of mechanical complications like the line breaking or becoming dislodged (7.3% versus 4.2%). Ports also lasted longer in the study, with a median follow-up of 60 weeks compared to 49 for PICC lines. Because the port is sealed under the skin when not in use, there’s less opportunity for bacteria to enter.
PICC lines do have advantages in certain situations. They don’t require a surgical procedure to place, and they can be removed at the bedside. For shorter treatment courses of a few weeks to a couple of months, a PICC line may make more sense. For anything lasting several months or longer, ports are generally the safer choice.
Maintenance Between Treatments
When a port isn’t being actively used, it still needs periodic flushing to keep the catheter from getting clogged. The standard approach is flushing with a heparin solution (a blood thinner) every two months. However, recent research has shown that flushing with plain saline every two months, or even heparin every four months, works just as well, with no difference in infection, clotting, or blockage rates. Your care team will tell you what schedule to follow.
Each flush is a quick visit. A nurse accesses the port with a Huber needle, pushes the solution through, and removes the needle. It takes only a few minutes.
Possible Complications
Portacaths are generally reliable, but they carry some risks. The overall complication rate falls between 7% and 12.5%. The most common issues are:
- Infection: Port-associated infection rates range from under 1% to as high as 27% depending on the study and patient population, with bloodstream infections occurring at a rate of about 2.8 cases per 1,000 days the port is in place. Signs include redness, warmth, or swelling at the port site, or fever and chills during or after use.
- Blood clots: Catheter-related clotting occurs in 5% to 18% of cases. A fibrin sheath, a thin layer of clotting material, can form around the catheter tip over time. This doesn’t always cause symptoms, but it can slow infusions or block blood draws. In a large study of over 51,000 patients, 1.8% developed a clot in an upper-arm vein.
- Mechanical problems: The catheter can occasionally shift position, kink, or in rare cases fracture. These issues usually show up when the port stops working properly during infusions.
Most complications can be managed without removing the port. Infections may be treated with antibiotics, and clots with blood thinners. If the problem can’t be resolved, the port is removed and a new one can be placed on the opposite side.
Living With a Portacath
Once the insertion site has fully healed (usually two to three weeks), a portacath has minimal impact on daily life. The port sits flat enough under the skin that most people can’t see it under clothing, though you can feel a small bump if you press on the area. Your port can stay in place for years if needed.
When the port is not accessed (no needle in it), you can shower, bathe, and swim normally. Exercise is fine, though you’ll want to avoid repeated high-impact contact to the port site, such as wearing a heavy backpack strap directly over it. Contact sports may require a discussion with your care team. When the port is accessed with a needle and dressing in place, you’ll need to keep the site dry.
How Removal Works
When treatment is complete or the port is no longer needed, it’s removed in a short procedure similar to the placement. You’ll need a blood test beforehand to check your blood count and clotting levels. If you take blood-thinning medications, your doctor may adjust them before the procedure.
You’ll fast for six hours before the appointment, though you can drink water up to two hours prior. The procedure is done under local anesthesia with sedation. The surgeon reopens the small incision, disconnects the catheter, and removes both the reservoir and the tube. Recovery is straightforward, with the incision typically healing within a couple of weeks and leaving a small scar.