1977-01-28
1977-12-06
Frinks, Ronald L.
A61F 120
Patent
active
040608565
ABSTRACT:
A patient subjected to laryngectomy is provided surgically with a fistula intended to serve as a pseudo-glottis, and a tracheostome, these two tracts being sited in the midline region of the neck surface. A laryngeal prosthesis for the patient is of generally symmetrical form comprising a hollowed main body with two external tubes to respectively engage the surgically-formed tracts, the fistular tube being sufficiently short to avoid inhibiting the pseudo-glottis function. The prosthesis body is apertured to provide a valve function communicating the tracheal tube with atmosphere for respiration, or with the fistular tube for phonation. This function can be effected by a normally-open flap valve closable by a first high pressure in the body, and a normally-closed blow-out valve may then be appropriate to open at second higher pressure to remove secretions, together with a further normally-open valve to close the fistular tube at the higher pressure. Also, a non-return valve is normally appropriate in the fistular tube, and this, or a similar valve, can serve as a tone generator if necessary.
REFERENCES:
patent: 2804076 (1957-08-01), Giraudon
patent: 3263684 (1966-08-01), Bolton
patent: 3747127 (1973-07-01), Taub
"Extirpation of the Larynx" by David Foulis, Scientific American, Supplement No. 115, Mar. 16, 1878, pp. 1834 & 1835.
"The Artificial Larynx" by Yvan Lebrum, Published by Swets & Zeitlinger, B.V. - Amsterdam, 1973, pp. 53-56.
Frinks Ronald L.
National Research Development Corporation
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