If conventional speaking valves for tracheostomized patients are used improperly, dangerous overpressure can occur, which can cause serious complications and even death. In a collaboration between the Freiburg Botanical Garden, the Medical Center—University of Freiburg and the Cluster of Excellence livMatS of the University of Freiburg, researchers developed a speaking valve with an integrated pressure release valve and an acoustic warning signal, inspired by the trapping mechanism of the carnivorous bladderwort plant Utricularia vulgaris.
Biomimetic speaking valve technology has enhanced safety features for tracheostomized patients
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