Surgery – Device for creating a tracheotomy incision
Patent
1980-07-14
1982-02-02
Cohen, Lee S.
Surgery
Device for creating a tracheotomy incision
123419F, A61N 130
Patent
active
043134386
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.
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Smith, "Intro. of Partial Limb Regeneration . . . ", The Anatomical Record, vol. 158, No. 1, May 1967.
Becker et al, "Electrical Stimulation . . . Mammals", Bull., N.Y. Accd. Med, vol. 48, No. 4, pp. 627-641, May 1972.
Becker et al, "Clinical Experience . . . Bone Growth", J. Clin. Orth, 124:75, 1977.
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