Abstract
125,754. Abel, A. L. April 25, 1918. Cannulas; tracheotomy applia n c e s. - Relates to laryngotomy and tracheotomy tubes, and consists in making one valve W, of a Fuller's bivalve tracheotomy tube, a little shorter than the other valve Y, and grinding the concave edge of the prolonged extremity of the longer valve X to form a knife-like or scalpel edge Y, Z. The large flange C of the outer tube, with slits B for the passage of tapes, and the cannula or inner tube D with base flange E and handles F as a whole, are not modified,
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