The Eska® Herrmann prosthesis was developed for insertion in a surgically created, so called "tracheal chimney". It can also be introduced without a tracheal chimney and is available in various bends. The comparatively small inner diameter creates a higher airflow resistance. The bill valve is stable against underpressure related valve openings.
|Type of prosthesis:||High-resistance non-indwelling/indwelling prosthesis|
|Outer diameter of shaft:||5.5 mm|
|Shaft lengths:||can be manufactured individually|
|Shaft curvatures:||60°, 75°, 90°|
|Material:||medical-grade silicone and metal tubes|
|Valve type:||bill valve|
|Method of insertion:||anterograde with carrier|
|Indication:||special prosthesis, e.g. for "tracheal chimney"|
|Non-fatiguing valve mechanism:||no|
1. Schultz-Coulon HJ., Medical after-care of laryngectomized patients with voice prosthesis,
HNO. 1993 Dec;41(12):597-608. Review. German.
2. Herrmann IF., Secondary surgical voice rehabilitation], HNO. 1987 Aug;35(8):351-4.
3. Issing WJ, Fuchshuber S, Wehner M., Incidence of tracheo-oesophageal fistulas after primary voice rehabilitation with the Provox or the Eska-Herrmann voice prosthesis., Eur Arch Otorhinolaryngol. 2001 Jul;258(5):240-2.