Voice prosthesis with biomedical sealing on the circumference

摘要

A voice prosthesis has a tubular body with two ends and an internal through-cavity communicating the ends. There are external widened sections at the two ends, with a valve body at the first end to permit air to flow in only one direction. On an outer surface of the tubular body is an adaptation for sealing the tubular body to a wall of the hole between the esophagus and trachea. The adaptation, in particular, is one or more rings protruding from the outer surface at a position between the two ends. The rings protrude at an angle, causing them to be canted toward the opposite end.