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DEVICE AND METHOD TO POSITION A CANNULA FOR NERVE BLOCK

  • US 20090210029A1
  • Filed: 02/11/2009
  • Published: 08/20/2009
  • Est. Priority Date: 02/14/2008
  • Status: Abandoned Application
First Claim
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1. A device to position a cannula or a catheter for nerve block for use with a unipolar cannula (10), which is electrically insulated around its axial length, the device comprising:

  • a stimulation device (20) to generate an electrical signal;

    an electrically conductive bare stimulation electrode (12) provided on a distal end of the unipolar cannula (10);

    a skin electrode (14), which can be applied to a body surface (26) of a patient with an electrically conductive contact;

    wherein the stimulation electrode (12) and the skin electrode (14) can be connected to the stimulation device (20), so that the electrical signals are routed from the stimulation electrode (12) through a patient'"'"'s body (28) to the skin electrode (14);

    wherein the stimulation device (20) comprises a measuring device (22) to measure the electrical resistance between the stimulation electrode (12) and the skin electrode (14), andwherein the stimulation device (20) comprises an alarm device (24) which produces an audible alarm signal when the measured resistance exceeds an adjustable threshold value.

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