A port is similar to a tunneled catheter but is left entirely under the skin. Medicines are injected through the skin into the catheter. Some implanted ports contain a small reservoir that can be refilled in the same way. After being filled, the reservoir slowly releases the medicine into the bloodstream. An implanted port is less obvious than a tunneled catheter and requires very little daily care. It has less impact on a person's activities than a PICC line or a tunneled catheter. Surgically implanted infusion ports are placed below the clavicle (infraclavicular fossa), with the catheter threaded into the right atrium through large vein. Once implanted, the port is accessed via non-coring "Huber" needles inserted through the skin. The health care provider may need to use topical anesthetic prior to accessing port. Ports can be used for medications, chemotherapy, TPN, and blood. As compared to CVC or PICC catheters, ports are easy to maintain for home-based therapy.
Ports are typically used on patients requiring only occasional venous access over a long duration course of therapy. Since the port must be accessed using a needle, if venous access is required on a frequent basis a catheter having external access is more commonly used.
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