The Provox 1 prosthesis is a stable low-pressure indwelling prosthesis that was for many years the primary choice for laryngectomies. Insertion is retrograde via a guide wire, which facilitates a safe positioning of the esophageal flange but is quite unpleasant for the patient when the prosthesis is changed. The Provox 1 prosthesis is therefore increasingly being replaced by the Provox 2, the insertion of which is anterograde and which is also suitable for primary use. Two key differences from the Provox 2 are that the enclosure around the valve is almost circular, and there is a 90° safety thread on the tracheal flange.
|Type of prosthesis:||Low-resistance indwelling prosthesis|
|Outer diameter of shaft:||7.5 mm|
|Shaft lengths:||4 mm, 6 mm, 8 mm, 10 mm|
|Valve type:||flap valve|
|Method of insertion:||retrograde with a guide wire|
|Indication:||primary introduction, standard prosthesis|
|Non-fatiguing valve mechanism:||no|
|Prevalence:||Europe, USA, Asia|
1. Long-term results of vocal rehabilitation after total laryngectomy with the low-resistance, indwelling Provoxvoice prosthesis system., Hilgers FJ, Balm AJ.,Clin Otolaryngol Allied Sci. 1993 Dec;18(6):517-23.
2. Aerodynamic characteristics of the Provox low-resistance indwelling voice prosthesis.
Hilgers FJ, Cornelissen MW, Balm AJ., Eur Arch Otorhinolaryngol. 1993;250(7):375-8.
3. A new low-resistance, self-retaining prosthesis (Provox) for voice rehabilitation after total laryngectomy.
Hilgers FJ, Schouwenburg PF., Laryngoscope. 1990 Nov;100(11):1202-7.