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

Claim 1

A phonation and respiratory aid device for a tracheotomized patient, comprising a tracheotomy cannula having a tip, means defining a channel in said tip, means including a non-return flap valve for preventing passage of an exhaled air flow and for allowing passage of an inhaled air flow, connecting means for permitting connection of said cannula to a source of fluid, support means for supporting said flap valve, said support means disposed downstream of said connecting means with respect to the inhaled air flow, wherein: said support means is interposed in said channel and comprises means including a support face forming a transverse wall for allowing air to flow through; fixing means defining a fixing area for mounting said flap valve against said transverse wall and downstream of said support means with respect to the inhaled air flow, said flap valve comprising a flexible material arranged to distort both axially and radially away from said fixing area as a result of the inhaled air flow and to be maintained in sealed relationship against said transverse wall as a result of the exhaled air flow, and wherein said connecting means is a connection grip provided in said tip and said source of fluid to which the connection means is connected is a forced oxygenation appliance.