Surgery – Device for creating a tracheotomy incision
Patent
1979-07-16
1982-02-09
Cohen, Lee S.
Surgery
Device for creating a tracheotomy incision
128419F, A61N 130, A61N 132
Patent
active
043145540
ABSTRACT:
A method and apparatus for providing germicidal and healing treatment of tissue such as bone wherein an electrode of silver or like material is applied to a living tissue site to be healed, initially a direct voltage is applied to the electrode of a polarity driving the electrode as an anode to release silver ions to create a germicidal environment at the site, and thereafter a direct voltage of opposite polarity is applied to the electrode driving it as a cathode to stimulate healing of the tissue at the site. The apparatus is implanted in the body of a patient, and in one embodiment a battery is connected through a switch to the electrode and a reference electrode, the switch initially connecting the electrode as an anode and thereafter changeable by an external operator such as a magnet to connect the electrode as a cathode. In another embodiment, another electrode and an element cooperate with the treating electrode to form a galvanic couple with the treating electrode to create a germicidal environment and a predetermined time thereafter the arrangement changes to a biogalvanic couple with body fluid to cause healing of the tissue. In either embodiment a wave shaping circuit can be operatively associated with the treating electrode to facilitate external monitoring of the apparatus when implanted.
REFERENCES:
patent: 3842841 (1974-10-01), Brighton et al.
patent: 3955583 (1976-05-01), Horauf
patent: 4019510 (1977-04-01), Ellis
patent: 4026304 (1977-05-01), Levy
patent: 4027393 (1977-06-01), Ellis et al.
patent: 4109660 (1978-08-01), Nesmeyanov et al.
Becker et al., "Clinical Experiences . . . Bone Growth", Jour. Clin. Orth., 124:75, 1977.
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