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Nerve locator and stimulator

  • US 4,962,766 A
  • Filed: 07/19/1989
  • Issued: 10/16/1990
  • Est. Priority Date: 07/19/1989
  • Status: Expired due to Term
First Claim
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1. A surgical nerve stimulator and locator which does not induce neuropraxia adapted to be used on a patient comprising, a handpiece, a first electrical lead connected to said handpiece and connectible to the patient'"'"'s body, a second electrical lead connected to said handpiece and connectible to the patient'"'"'s body to locate and stimulate nerves, a D.C. voltage source in said handpiece, a pulsed current source in said handpiece connected to said first and second electrical leads and to said voltage source, and a first two position switch connected to said pulsed current source and in a first position causing a pulse to be generated by said pulsed current source having a first pulse repetition rate and in a second position causing a pulse to be generated by said pulsed current source having a second pulse repetition rate, including a second two position switch connected to said pulsed current source and in a first position causing said pulsed current source to generate current pulses having a first amplitude and in a second position causing said pulsed current source to generate current pulses having a second amplitude, wherein said second electrical lead is enclosed by insulation material except at its end remote from said hand piece, including an indicator connected to said first and second electrical leads to indicate when current flows between them through the patient'"'"'s body, and including a loudspeaker connected to said first and second electrical leads to aurally indicate when current flows between them through the patient'"'"'s body.

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