Overlaid multi sensor radio frequency (RF) electrode system to measure tissue compression

  • US 10,548,504 B2
  • Filed: 03/06/2015
  • Issued: 02/04/2020
  • Est. Priority Date: 03/06/2015
  • Status: Active Grant
First Claim
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1. A tissue compression sensor system comprising:

  • an RF electrode positioned on an end-effector;

    a first electrical contact positioned on one of an anvil or a channel frame of the end-effector;

    a first filter communicatively coupled to the first electrical contact;

    a second electrical contact positioned on another of the anvil or the channel frame of the end-effector;

    a second filter communicatively coupled to the second electrical contact; and

    a multiplexer configured to overlay two or more RF tissue monitoring signals and transmitting the overlaid two or more RF tissue monitoring signals to the end-effector, anda controller coupled to the multiplexer,wherein a frequency of each of the two or more RF tissue monitoring signals is in a range of 100 kHz to 20 MHz, andwherein each of the two or more RF tissue monitoring signals is at a different frequency,wherein the controller is configured to simultaneously measure a first impedance at a first frequency and a second impedance at a second frequency using the RF electrode, andwherein the controller is further configured to determine a vertical tissue compression based on the first impedance and a lateral tissue compression based on the second impedance.

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