In vitro evaluation of the iValve: a novel hands-free speech valve.

Objectives: We performed in vitro evaluation of a novel, disposable, automatic hands-free tracheostoma speech valve for laryngectomy patients based upon the principle of inhalation. The commercially available automatic speech valves close upon strong exhalation and open again when the pressure drops. This method makes long sentences or pauses difficult.

Worldwide, multicenter study of peristomal geometry and morphology in laryngectomees and its clinical effects.

Background: The purpose of this study was to improve attachment of automatic tracheostoma valves, the knowledge on tracheostoma geometry, and its clinical influences preferred. This article investigates whether the number of removed trachea rings, incision of the sternocleidomastoid muscles, neck dissection, reconstruction, time after operation, and age have any effect on the (peri)stomal geometry of the patient.

Methods: (Peri)stomas of 191 patients from 10 institutes worldwide were photographed, measured, and compared.