A chest port provides access to a central venous catheter, which is a tube that doctors place into the chest of a patient who needs ongoing medical treatment, such as dialysis, chemotherapy, long-term antibiotics or nutritional therapy, explains MedlinePlus. Using a chest port helps reduce stress on the veins.
The patient's skin covers the chest port, and when an injection or blood draw is necessary, medical staff uses the port, accessing it with a special needle, states MedlinePlus. A chest port does not hurt once the patient has healed from the initial insertion. The doctor must flush out the port about once a month to prevent blood clots. After completion of treatment, the doctor removes the chest port.