Surgery – Respiratory method or device – Respiratory gas supply means enters mouth or tracheotomy...
Patent
1986-03-03
1986-12-09
Howell, Kyle L.
Surgery
Respiratory method or device
Respiratory gas supply means enters mouth or tracheotomy...
A61M 1600
Patent
active
046274332
ABSTRACT:
A tracheostomy device for insertion into the trachea for ventilation has inner and outer cannulae. A sealing cuff on the inner cannula forms a seal with a wall of the trachea. A housing connects to the inner and outer cannulae and communicates with an outside air source. The outer cannula is provided with a fenestration between the cuff and the patient's vocal cords. The inner cannula is slidable within the outer cannula, the two being connected by a spring and bellows arrangement. The inner cannula slides down to close the fenestration during inhalation and slides up to open the fenestration upon exhalation of the air from the patient's lungs.
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Howell Kyle L.
Smith Ruth S.
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