Silicone, one-way slit valve prosthesis designed for placement in a passage between the trachea and the esophagus for voice restoration following laryngectomy
The one-way valve of the duckbill protects the airway during swallowing and opens under positive pressure so that air crosses into the esophagus to produce voice
The duckbill is a patient-maintained device; the patient may insert, remove and clean the device independently
