Medical instruments for use in tissue expansion reconstructive surgery where patient controls the expansion process by infusing fluid into the expander in small increments by her/himself; Surgical and medical apparatus and instruments for use in general surgery; Surgical instruments for use in expansion of soft tissue to increase the amount available for reconstruction by using an apparatus controlled by patient ensuring small rapid infusion of small amounts of fluid controilled by the patient; Surgical instruments, namely, an infusion device controlled by the patient used to expand tissue for use where it is deficient e.g. breast reconstruction, major scarring, hair loss etc