How Do Saline Fill Visits for an Expander Work?
Fills are short outpatient visits: saline is injected through a built-in port every one to few weeks until the target volume is reached.
A tissue expander has a small valve, or port, that the care team locates with a magnet or by touch. At each visit a thin needle passes through the numbed chest skin into the port, and a measured amount of sterile saline is added. Most sessions take only minutes.
Pace, sensations, and when to call
Because mastectomy usually leaves the chest skin with reduced feeling, many patients report pressure rather than sharp pain during fills, though sensation varies by individual. A feeling of tightness for a day or two afterward is expected and typically eases as the skin adapts.
The number of fills depends on the planned final size and how the skin responds — some finish in three visits, others need more. Redness, fever, or pain that builds instead of fading is a reason to contact the clinic promptly rather than wait for the next scheduled consultation.
MediIndex articles are for general information only and are not medical advice, diagnosis, or advertising. Outcomes vary by individual — consult a board-certified specialist for personal decisions.