Overlaid multi sensor radio frequency (RF) electrode system to measure tissue compression
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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Abstract
A tissue compression sensor system is disclosed. The tissue compression system includes 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; and a first filter communicatively coupled to the first electrical contact.
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Citations
15 Claims
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1. A tissue compression sensor system comprising:
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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, and a 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, and wherein 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, and wherein 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for sensing tissue compression, the method comprising:
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clamping tissue between two jaws of an end-effector, the jaws of the end-effector comprising an anvil, a channel frame, and an RF electrode for measuring impedance of the tissue, overlaying, by a controller, two or more RF tissue monitoring signals on a multiplexer and transmitting the overlaid RF tissue monitoring signals to the end-effector; returning the overlaid two or more RF tissue monitoring signals on a common return path via electrical contacts on at least one of the anvil or the channel frame of the end-effector; and filtering, by two or more filters, the overlaid two or more RF tissue monitoring signals prior to joining the RF tissue monitoring signals on the common return path, wherein a frequency of each of the two or more RF tissue monitoring signals is in a range of 100 kHz to 20 MHz, wherein each of the two or more RF tissue monitoring signals is at a different frequency, simultaneously measuring a first impedance at a first frequency and a second impedance at a second frequency using the RF electrode, determining a vertical tissue compression based on the first impedance, and determining a lateral tissue compression based on the second impedance. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification