A chemo port is a small device, about the size of a quarter, that gets implanted under your skin to deliver chemotherapy drugs directly into a large vein. It stays in place for the entire duration of treatment, so you don’t need a new IV needle stuck into your arm every session. The port sits just beneath the skin, usually on the upper chest, and connects to a vein through a thin flexible tube called a catheter.
How a Chemo Port Is Built
The device has three main parts. The port itself is a small reservoir, the part where medications are injected. At its center is the septum, a disc made of self-sealing rubber that can be punctured hundreds of times without leaking. Connected to the port is the catheter, a thin silicone tube that threads into a large vein near your heart.
Because the whole device sits under the skin, there’s nothing hanging outside your body between treatments. You’ll be able to feel a small bump where the port is implanted, and you may see a slight raised area, but it’s not visible through most clothing.
Why Ports Are Used Instead of Regular IVs
Chemotherapy drugs are powerful, and many of them can damage smaller veins in your hands and arms. When these drugs leak out of a small vein into surrounding tissue (called extravasation), they can cause serious irritation or injury. A port bypasses that problem entirely by delivering drugs into a large central vein where blood flow quickly dilutes the medication.
Ports also solve a practical problem. If you’re receiving chemotherapy every few weeks for months, repeated needle sticks in your arm veins take a toll. Veins can become scarred, harder to access, and painful. A port gives your care team a single reliable access point every time. Blood draws can also be done through the port, which means fewer needle sticks overall. For people with difficult veins, including older adults and children, a port can reduce a significant source of anxiety and discomfort throughout treatment.
Ports are generally recommended when chemotherapy will continue for a long time, when peripheral veins are hard to access, or when the specific drugs being used are known to irritate smaller veins.
How the Port Is Placed
Port placement is a minor surgical procedure, typically done as an outpatient visit. Most people receive a combination of local anesthesia to numb the area and light sedation to keep them relaxed. Adults are often technically conscious during the procedure but won’t remember it afterward. Children usually receive general anesthesia.
The most common location is the upper right side of the chest, below the collarbone. Some people get ports placed on the inner side of the upper arm or in the abdomen below the ribcage, depending on their situation. The surgeon makes a small incision, creates a pocket under the skin for the port, and threads the catheter into a large vein, typically the subclavian or internal jugular vein. The whole procedure usually takes under an hour.
You’ll have some soreness and bruising around the site for a few days afterward. Most people can resume normal activities within a week, though you’ll want to avoid heavy lifting or vigorous arm movements on that side until the incision heals.
What Happens During a Treatment Session
When it’s time for chemotherapy, a nurse accesses the port by inserting a special noncoring needle through the skin and into the rubber septum. This needle is designed with a deflected tip so it doesn’t damage the septum, allowing it to reseal after every use. You’ll feel a quick poke, similar to a standard blood draw. Some people ask for a numbing cream applied to the skin beforehand, which takes the edge off.
Once the needle is in place, chemotherapy drugs flow through the port, into the catheter, and directly into the large vein. After treatment is finished, the needle is pulled straight out and the septum seals itself. There’s no open wound to manage between sessions.
Living With a Port
Between treatments, the port requires very little attention. When it’s not being actively used, guidelines recommend having it flushed every four weeks. Flushing means a nurse pushes a small amount of fluid through the port to keep the catheter clear and prevent blockages. This is a quick visit, often just a few minutes.
When the port isn’t accessed (no needle in it), you can shower normally once your incision has fully healed. Most daily activities, including light exercise, are fine. You’ll want to avoid contact sports or activities that could deliver a hard blow to the port site. The bump under your skin may feel odd at first, and some people find that seatbelts or backpack straps press on it uncomfortably, but most adjust quickly.
Possible Complications
Ports are generally safe, but like any implanted device, they carry some risks. The most common complication is infection, occurring in roughly 5 to 8% of cases. Signs include redness, warmth, swelling, or drainage at the port site, or a fever that develops after the port is accessed. Infections are the leading reason a port needs to be removed before treatment is finished.
Blood clots related to the catheter occur in about 1 to 5% of cases, though some estimates run higher. A clot may cause swelling in the arm or neck on the side of the port, or the port may stop drawing blood properly. Clots don’t always mean the port has to come out; many can be treated with blood-thinning medication.
Less common issues include the catheter tip shifting out of position (about 9% during placement), drug leaking from the port into surrounding tissue, and, rarely, skin breakdown over the device. Most of these complications are manageable when caught early, which is why your care team will check the port regularly.
When the Port Comes Out
Once chemotherapy is complete and your oncologist confirms you no longer need the port, it’s removed in another minor outpatient procedure. Like placement, this is done under local anesthesia with light sedation. The surgeon reopens the small incision, disconnects the catheter from the vein, and removes the entire device. Recovery is similar to placement: a few days of soreness, with most people back to normal activities within a week. The scar is typically small and fades over time.
Some people keep their port in for months after treatment ends, particularly if there’s a chance they may need additional cycles. As long as it’s flushed on schedule, a port can safely remain in place for years.