Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1989-06-19
1991-07-09
Apley, Richard J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 18, 128419F, 4332011, A61F 228
Patent
active
050302361
ABSTRACT:
An invasive prosthesis device is disclosed which includes an electrical circuit having a cathode and an anode for mounting on opposing sides of body tissue requiring healing. The cathode is connected to a source of power for transmitting electrical stimulating signals to the anode as target. The invasive device includes a constant current circuit which may include either a battery source of power or a power source iductively coupled to the constant current source circuit. If the power source is inductively coupled to the constant current source a diode rectifier can be coupled between the inductive coil and constant current source for rectifying the induced ac to dc. The prosthesis device includes a porous surface area located to maximize the bonding strength between the device and the body tissue. The cathode is located in the porous area and powered to limit tissue growth to ingrowth substantially within the porous area only. The constant current circuitry including the induction coil and time constant circuit or battery as appropriate are housed within the interior of the prosthesis device together with the leads interconnecting the constant current source to the cathode.
REFERENCES:
patent: 4027392 (1977-06-01), Sawyer et al.
patent: 4175565 (1979-11-01), Chiarinza et al.
patent: 4195367 (1980-04-01), Kraus
patent: 4314554 (1982-02-01), Greatbatch
patent: 4549547 (1985-10-01), Brighton et al.
patent: 4602638 (1986-07-01), Adams
"Electrical Stimulation of Hard and Soft Tissues in Animal Models", by Black, Clinics in Plastic Surgery, vol. 12, No. 2, Apr. 1985, pp. 243-257.
Apley Richard J.
Cheng Joe H.
Intermedics Orthopedics, Inc.
Merkling John R.
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