Wireless transmitter for needle electrodes as used in electromyography
First Claim
1. A self-contained, battery powered, hand-held, wireless transmitter usable with a disposable mono or bipolar needle electrode to sense electrochemical nerve impulses as transmitted through the nervous system and muscles of humans and animals, said transmitter comprising a generally rectangular molded plastic case with integrally formed top, bottom, side, front and rear walls, printed circuit board means arranged between and extending parallel to said front and rear walls of said case and engaging said sides thereof, electrical circuit components and circuitry on said printed circuit board means including a high gain instrumentation signal amplifier, a signal level shifter stage, an AC amplifier, a modulator diode, a power oscillator transistor, and an antenna, said electrical circuit components and circuitry also including an input connector jack extending through and below said bottom wall of said case for frictional and electrical interconnection with a needle electrode, said transmitter also comprising battery receptor recesses in said front and rear walls of said case in which are placeable batteries for powering said electrical circuit components and circuitry, and an encapsulating medium filling the interior of said case defined by said top, bottom, side, front and rear walls thereof and encapsulating said printed circuit board means and said electric circuit components circuitry thereon.
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Accused Products
Abstract
A self-contained, battery powered, hand-held transmitter usable with mono or bipolar needle electrodes to sense electrochemical nerve impulses as transmitted through the nervous system and muscles of humans and animals. The hand-held transmitter is of miniaturized, generally rectangular form and comprises electronics developing and transmitting a VHF signal receivable by conventional FM receiver means. Being wireless, the transmitter avoids the possible signal distortions and restrictions of patient and physician movements which are inherent when using cable interconnections between electromyographic sensors and associated analytical equipment.
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Citations
6 Claims
- 1. A self-contained, battery powered, hand-held, wireless transmitter usable with a disposable mono or bipolar needle electrode to sense electrochemical nerve impulses as transmitted through the nervous system and muscles of humans and animals, said transmitter comprising a generally rectangular molded plastic case with integrally formed top, bottom, side, front and rear walls, printed circuit board means arranged between and extending parallel to said front and rear walls of said case and engaging said sides thereof, electrical circuit components and circuitry on said printed circuit board means including a high gain instrumentation signal amplifier, a signal level shifter stage, an AC amplifier, a modulator diode, a power oscillator transistor, and an antenna, said electrical circuit components and circuitry also including an input connector jack extending through and below said bottom wall of said case for frictional and electrical interconnection with a needle electrode, said transmitter also comprising battery receptor recesses in said front and rear walls of said case in which are placeable batteries for powering said electrical circuit components and circuitry, and an encapsulating medium filling the interior of said case defined by said top, bottom, side, front and rear walls thereof and encapsulating said printed circuit board means and said electric circuit components circuitry thereon.
Specification