ApplicationNo. 544384 filed on 04/06/2000
US Classes:600/554, Sensitivity to electric stimulus600/587, Measuring anatomical characteristic or force applied to or exerted by body607/48Directly or indirectly stimulating motor muscles
ExaminersPrimary: Winakur, Eric F.
Assistant: Wingood, Pamela L.
Attorney, Agent or Firm
Foreign Patent References
International ClassA61B 005/05
AbstractA hand-held disposable combination surgical nerve evaluator and locator is provided. The device includes a housing that serves as a handpiece and that accommodates a printed circuit board, a DC voltage source and a compressed gas source. Two pre-programmed settings are provided by way of a nerve evaluation switch and a nerve location switch. By choosing a nerve evaluation switch, a pulsed current is sent down one electrical lead that extends outward from the housing. A return electrical lead is provided that also extends outward from the housing in a parallel, but spaced-apart relationship from the other electrical lead. Compressed gas is delivered to the distal ends of the first and second electrical leads by a cannula that is connected to the compressed gas source. It will also be noted that the return or the second electrical lead can also serve as a cannula for the delivery of compressed gas. A fiber optic light guide may also be provided to illuminate the area around the distal ends of the two electrical leads. In a nerve evaluation mode, when the nerve evaluation switch has been activated, a pulsed current is delivered to the first electrical lead. Similarly, in a nerve location mode, a pulsed current is also delivered to the first electrical lead. However, the frequency of the pulsed current in the nerve evaluation mode is less than the frequency of the current in the nerve location mode, the pulse duration in the nerve evaluation mode is less than the pulse duration in the nerve location mode and the amplitude of the current in the nerve evaluation mode is less than the amplitude of the current in the nerve location mode.
Field of SearchTesting means inserted in body
Measuring electrical impedance or conductance of body portion
Sensitivity to electric stimulus
Touch or pain response of skin
Measuring anatomical characteristic or force applied to or exerted by body
Body movement (e.g., head or hand tremor, motility of limb, etc.)
Electrical treatment of pain
Directly or indirectly stimulating motor muscles