Abstract: A contraceptive or non-contraceptive diaphragm having a rim surrounding a thin membrane, the membrane having a cervical dome extending downwardly from a posterior portion of the membrane. The rim has a spring member having non-uniform bending characteristics. The shape of the spring member can be contoured to provide a rim that curves slightly upwardly at the anterior end of the diaphragm and slightly downwardly at its posterior end.

Abstract: An improved injection port (1) for a single-use syringe is described. One embodiment of the injection port has a one-way valve system for making it more difficult to reuse the syringe (2). The one-way valve system has a flap or diaphragm valve (6) housed in a valve chamber (11) at the proximal end of port cylinder (45). When the valve (6) is seated against valve seat (51) on valve cap (5), refilling of the syringe is blocked. During injection, the valve (6) unseats and moves toward radial ribs (7), allowing flow of medicament into the proximal end of a needle (2). Another embodiment of the injection port (1) includes longitudinal grooves (8) on the interior surface of the chamber (12) at the distal end of cylinder (45). The grooves (8) vent pressure from a Luer syringe inserted in the distal end of the cylinder (45).