| 摘要 |
A tracheostoma prosthesis includes a tubular outer cannula with a proximal part and a distal part, a tubular inner cannula, wherein the inner cannula can be guided into the opening at the proximal part of the outer cannula and can he locked by locking or retaining means, and the outer edge of the proximal part of the outer cannula has two recesses lying opposite to each other, wherein the recesses are in the shape of an arc of a circle and are designed to receive a thumb and index finger of a hand for gripping the proximal end of the inner cannula at surfaces of the proximal end of the inner cannula exposed by the recesses, and the inner cannula has a bead-like edge at its proximal end. |
