Phonation device for tracheotomy patients including a check valve and filtering means

摘要

PCT No. PCT/FR90/00382 Sec. 371 Date Apr. 5, 1991 Sec. 102(e) Date Apr. 5, 1991 PCT Filed Jun. 1, 1990 PCT Pub. No. WO90/14854 PCT Pub. Date Dec. 13, 1990.A phonation and respiratory aid device for a tracheotomy patient comprising a tracheotomy cannula, a non-return valve for permitting inhalation flow only, the valve being distorted both axially and radially due to inhalation, a connecting means for connection to a source of fluid from a forced oxygenation device, the connecting means being upstream of the valve in the inhalation flow direction, and two filtering elements also upstream of the valve, the filtering elements including a Venturi tube.