Introduction

An implanted venous port, often simply called an implanted port or IV port, is a small device placed under the skin to provide reliable access to a patient’s bloodstream. It is commonly used when someone needs IV treatment repeatedly or over a long period of time.

Unlike a standard peripheral IV, which is inserted into a vein in the hand or arm and usually stays in place for a relatively short period, an implanted port can remain in the body for months or even years when medically appropriate. When treatment is needed, healthcare professionals can access the port through the skin rather than starting a new peripheral IV each time.

Implanted ports are commonly associated with chemotherapy, but they can also be used for other treatments that require ongoing or repeated venous access.

What Is an Implanted Venous Port?

An implanted venous port is a type of central venous access device. The entire device sits beneath the skin, with no tubing remaining outside the body when the port is not being accessed.

The port itself is usually a small, raised chamber that can be felt under the skin. It connects to a thin catheter that travels into a large central vein. Together, the port and catheter create a pathway that healthcare professionals can use for prescribed IV therapies.

One of the main advantages of this design is that the port can remain in place between treatments. Instead of finding and puncturing a peripheral vein at every visit, the implanted port can be accessed when needed.

Main Parts of an Implanted Venous Port

Although designs vary, an implanted venous port has three main parts that are useful to understand:

1. Port Reservoir:
The reservoir is the small chamber implanted beneath the skin. It forms the main body of the port and is the part healthcare professionals locate by feeling through the skin before accessing it.

2. Self-Sealing Septum:
On top of the reservoir is a self-sealing septum, typically made from silicone. This is the area designed to be punctured with a non-coring needle, commonly called a Huber needle.

The needle passes through the patient’s skin and into this septum. In other words, when a nurse “accesses a port,” the needle is not simply placed somewhere near the device—it enters the septum of the implanted port to establish access to the reservoir.

The septum is designed for repeated access and reseals after the needle is removed.

3. Catheter:
A thin catheter is connected to the port reservoir and extends into a large central vein. Once the port has been properly accessed, fluids or medications can travel through the reservoir and catheter into the bloodstream.

Together, these components form a closed vascular access system that remains under the skin when it is not in use.

Why Is an Implanted Venous Port Used?

For a patient who only needs a short course of IV treatment, a peripheral IV may be sufficient. But some patients need intravenous therapy repeatedly over weeks, months, or longer.

Repeated peripheral IV insertion can become difficult, especially for patients who have poor venous access or who receive frequent treatments. Certain medications and therapies may also be better suited to central venous administration.

An implanted port provides a more durable option for patients who require this type of ongoing access. Because the device stays beneath the skin between treatments, there is no external catheter that needs to remain outside the body when the port is not accessed.

Common Reasons a Patient May Need an Implanted Port

An implanted port may be used for several types of treatment or clinical needs, including:

• Chemotherapy: Cancer treatment is one of the most familiar uses of implanted ports. Patients may receive repeated treatment over many weeks or months, making reliable venous access particularly important.
• Long-term IV medications: Some conditions require medications to be administered intravenously over an extended period.
• Repeated infusions: Patients who return regularly for IV therapies may benefit from having an established central venous access device.
• Blood or blood product administration: An implanted port may be used for blood or blood product transfusions when appropriate.
• Blood sampling: Some implanted ports can be used to obtain blood samples when clinically appropriate and according to facility protocols.
• Other long-term intravenous therapies: Ports may also be used for other treatments when reliable, repeated central venous access is needed.

Whether a patient needs an implanted port depends on the type and duration of treatment, the condition of their veins, and other clinical considerations.

Where Is an Implanted Venous Port Placed?

Implanted ports are commonly placed beneath the skin of the upper chest, although other locations may be used depending on the patient and clinical situation.

After placement and healing, the port is completely covered by skin. There is no open port or connector visible from outside the body. Instead, the reservoir usually creates a small raised area that can be felt beneath the skin.

The catheter attached to the reservoir travels beneath the skin and enters a central vein, with its tip positioned within the central venous circulation.

This is an important feature to understand when learning about port access: healthcare professionals generally cannot directly see the septum they need to access. They first identify the implanted reservoir by palpating through the skin and locating its borders and center.

How Is an Implanted Port Used?

Having an implanted port does not mean that a needle stays in the patient’s chest all the time.

When the port is not needed, it remains completely beneath the skin. When IV access is required for treatment, a trained healthcare professional accesses the port using a non-coring needle.

The basic process involves locating the port beneath the skin, preparing the access site, stabilizing the port, and inserting the needle through the skin and into the port's septum. Once appropriate access has been established, the port can be used for the prescribed therapy.

After treatment, the needle may be removed according to the patient's treatment plan and facility protocol. The port itself remains implanted beneath the skin for future use.

This process is commonly referred to as implanted port access, IV port access, or simply port access.

Because accessing an implanted port involves proper identification of the device, aseptic technique, needle placement, and management of a central venous access device, healthcare professionals require appropriate education and hands-on training before performing the procedure in clinical practice.

Implanted Port vs. Peripheral IV: What’s the Difference?

Both an implanted port and a peripheral IV provide access to the bloodstream, but they are designed for different situations.

The key difference is not simply where the device is located. A peripheral IV is generally intended to provide temporary venous access, while an implanted port is designed to provide reliable access over a longer period when repeated treatment is expected.

Conclusion

If you’re learning about implanted venous ports for the first time, the device and the process of accessing it can seem a little unfamiliar. Unlike a peripheral IV, the port is hidden beneath the skin, so you need to understand what you’re feeling for, where the needle needs to go, and how the port connects to the venous system.

Once you understand the basic structure of an implanted port and why patients may need one, the access procedure becomes much easier to make sense of. From there, the next step is learning how to locate the port, handle a Huber needle, and work through the port access process safely and confidently.

For nursing students and healthcare professionals learning this skill, hands-on practice can help turn that basic understanding into a procedure that feels more familiar before working with patients. An IV Port Access Trainer provides a practical way to practice locating and stabilizing an implanted port, inserting a Huber needle, and becoming familiar with the port access process in a simulated setting.