Surgery – Truss – Pad
Patent
1980-01-31
1981-06-09
Kamm, William E.
Surgery
Truss
Pad
128793, A61N 136
Patent
active
042718414
ABSTRACT:
A system for the treatment of ocular misalignment by electrical stimulation of ocular recti. A body implantable unit develops an electrical stimulation signal and delivers that signal to an ocular rectus without restricting its contraction. In a preferred embodiment, the implanted unit includes a receiving member which cooperates with an external transmitting unit, the external transmitting unit establishing the stimulation signal parameters. Preferably, the stimulation signal is a periodically interrupted train of pulses, the repetition rate of the stimulation signal pulses being within the range of 50 to 100 pulses per minute. The interruption of the pulse train results in a stochastic stimulation with the pulse train being delivered for approximately 1 to 5 seconds with the interval between stimulation signals being from approximately 5 to 25 seconds. The pulse amplitude may be selectively established in the range from about 0.8 to 15 volts with the pulses having a pulse width of approximately 0.22 milliseconds. During stimulation, a divergence movement is attained to correct the ocular misalignment while chronic stimulation results in a histological and anatomical change in the stimulated rectus which also tends to overcome the ocular misalignment.
REFERENCES:
patent: 2525381 (1950-10-01), Tower
patent: 3727616 (1973-04-01), Lenzkes
Kamm William E.
Medtronic Inc.
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