Eska® Herrmann

Clinical application

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"
Biofilm resistance: no
Underpressure stability: yes
Non-fatiguing valve mechanism: no
Prevalence: local


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.