Adjustable tracheostoma valve

Details Adjustable tracheostoma valve Adjustable tracheostoma valve

1991-02-04

1991-10-22

Shay, Randy Citrin

Prosthesis (i.e., artificial body members), parts thereof, or ai

Larynx, trachea, tracheobronchial prosthesis or combination...

12820716, A61F 220

Patent

active

050592084

ABSTRACT:
A patient adjustable valve to control the flow of air through an opening surgically created in the neck of the patient. Two concentrically rotatable tubular parts form the outer body and the inner annular sealing surface of the valve. A disk shaped diaphragm proximate the sealing surface allows the free passage of air to the trachea for lower breathing pressures but flaps closed for the higher pressures that precede speech. The normally curled diaphragm is pushed to a flatter, easier to close, position by a cam on the inside of the outer body when the body is rotated relative to the sealing surface.

REFERENCES:
patent: 3747127 (1973-07-01), Taub
patent: 3952335 (1976-04-01), Sorce et al.
patent: 4040428 (1977-08-01), Clifford

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