Surgery – Truss – Pad
Patent
1983-03-07
1985-05-28
Kamm, William E.
Surgery
Truss
Pad
A61N 120
Patent
active
045193940
ABSTRACT:
Disclosed is a method and apparatus for maintaining the potential between a cathode and a reference electrode substantially constant during electrically-induced osteogenesis. Two separate embodiments of electronic circuits are provided which will generate a D.C. current to flow between a cathode and anode while maintaining the potential between the cathode and the reference electrode substantially constant within the range of 0.1 to 1.26 Volts and preferably within the range of 1.0 to 1.26 Volts. Improvement in the amount of new bone grown over prior art bone growth stimulators is on the order of 200 to 300 percent. The electronic circuits provide the substantially constant cathodic potential over a wide range of load impedances between the anode and cathode. The disclosure is applicable not only to improving osteogenesis in bone fracture sites, but also to applications in which it is desirable to provide bone accretion for any reason.
REFERENCES:
patent: 3842841 (1974-10-01), Brighton et al.
patent: 3848608 (1974-11-01), Leonard
patent: 4026304 (1977-05-01), Levy
Zimmer USA "The Alternate Treatment of Fracture Nonunion-Electrical Stimulation to Induce Osteogenesis" Zimmer USA Sales brochure Lit No. B-2360-1, Sep. 1979.
Baranowski, Jr. Thomas J.
Black Jonathan
Kamm William E.
Shein Mitchell J.
Trustees of the University of Pennsylvania
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