Heimomed Phonax® Prothese
The PHONAX® voice prosthesis was first introduced in Germany in May 2009. The valve body is made of polypropylene. There is a TPE reinforcement tube in the valve bush that carries the flap valve. The bush is interspersed with an x-ray contrast agent; its outer diameter is 7 mm (21 Fr) and the inner diameter 3.8 mm (11.3 Fr).
The shaft length (in mm) is on the tracheal flange. The tracheal side of the tracheal flange is identified by 6 nubs. For anterograde insertion, the PHONAX® is placed on a flexible applicator and attached using the fixation thread.
The safety thread has a tensile strength of 15 N. The esophageal flange of the PHONAX® is bent slightly towards the shaft as an aid to insertion and to adjusting its length to the shunt. Clinical studies are currently being carried out on the PHONAX® voice prosthesis.
|Type of prosthesis:||Low-resistance indwelling prosthesis|
|Outer diameter of shaft:||21 Fr (7 mm)|
|Shaft lengths:||4.5 mm, 6 mm, 8 mm, 10 mm, 12.5 mm|
|Material:||prosthesis body: thermoplastic elastomer, sleeve (green):polypropylene|
|Valve type:||flap valve|
|Method of insertion:||anterograde and retrograde|
|Non-fatiguing valve mechanism:||no|