VOICE PROSTHESIS Russian patent published in 2012 - IPC A61F2/20 

FIELD: medicine.

SUBSTANCE: invention relates to medicine. Prosthesis for recovery of larynx function includes cylindrical case with tracheal and esophageal flanges and leaf valve. Prosthesis represents single-piece construction, is made from biocompatible silicon rubber. Diameter of internal opening of esophageal flange is smaller than internal diameter of main cylinder. Esophageal end of prosthesis is made in form of socket, whose diameter equals diameter of main cylinder and axis has inclination angle 15° to main cylinder axis. Lateral surface of socket has different length, upper part of socket being longer in comparison with lower part. Leaf valve is placed inside socket from external side of esophageal flange, with 7°30' deviation from vertical axis toward esophagus. Diameter of leaf valve is larger than diameter of esophageal flange, leaf valve is 0.6-0.8 mm thick. Thickening of lower part of esophageal flange serves the basis of leaf valve. Prosthesis represents single-piece structure; slight opening of valve during exhalation occurs due to placement of leaf valve inside socket from external side of esophageal flange, with 7°30' deviation from vertical axis toward esophagus; reliable closing of valve at absence of pressure during exhalation is due to the fact that diameter of leaf valve is smaller than diameter of main cylinder and larger than diameter of internal opening of esophageal flange; food is prevented from getting into trachea due to implementation of esophageal end of prosthesis in form of socket, whose lateral surface has different length, and axis of socket rotation has inclination angle 15° to axis of main cylinder rotation.

EFFECT: invention ensures reliability of exploitation.

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