Surgical resection apparatus
First Claim
1. A surgical instrument having:
- a cutting element having a blade with an edge for cutting biological tissue;
a first antenna arranged to emit a substantially uniform microwave field of radiation at a first carrier frequency at the edge of the blade of the cutting element; and
a second antenna arranged to emit a microwave radiation field at a second carrier frequency from the cutting element, the second carrier frequency being lower than the first carrier frequency,wherein the edge of the blade of the cutting element comprises a radiating portion for the first antenna, andwherein the second antenna is mounted adjacent the edge of the blade of the cutting element, whereby both antennas emit a substantially uniform microwave radiation field along the edge of the blade of the cutting element.
4 Assignments
0 Petitions
Accused Products
Abstract
Surgical cutting apparatus having a treatment channel and a measurement channel for conveying microwave energy from a source to an antenna at a cutting edge. The measurement channel operates at lower power than the treatment channel for determining when higher energy can be safely applied. The apparatus may deliver microwave radiation at differing frequencies to one or more antennas at the cutting edge, e.g. to provide different treatment effects. The source may generate an output for an antenna whose frequency can be selected e.g. for most efficient operation. Selection may be automatic based on detected magnitude and phase of reflected signals during a frequency sweep of a forward signal. Power delivered to tissue via the cutting element may be manually boosted to deal with large blood vessels. The apparatus may include a reflected power monitor for recognizing behavior in reflected signals received from the antenna to trigger automatic pre-emptive action.
33 Citations
14 Claims
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1. A surgical instrument having:
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a cutting element having a blade with an edge for cutting biological tissue; a first antenna arranged to emit a substantially uniform microwave field of radiation at a first carrier frequency at the edge of the blade of the cutting element; and a second antenna arranged to emit a microwave radiation field at a second carrier frequency from the cutting element, the second carrier frequency being lower than the first carrier frequency, wherein the edge of the blade of the cutting element comprises a radiating portion for the first antenna, and wherein the second antenna is mounted adjacent the edge of the blade of the cutting element, whereby both antennas emit a substantially uniform microwave radiation field along the edge of the blade of the cutting element. - View Dependent Claims (2)
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3. Surgical cutting apparatus having:
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a microwave radiation source arranged to generate a first microwave radiation carrier signal having a first carrier frequency and a second microwave radiation carrier signal having a second carrier frequency; a surgical instrument having a cutting element comprising; a blade with an edge for cutting biological tissue, a first antenna connectable to the source to receive the first microwave radiation carrier signal and arranged to emit a substantially uniform microwave radiation field at the first carrier frequency along the edge of the blade of the cutting element, and a second antenna connectable to the source to receive the second microwave radiation carrier signal and arranged to emit from the surgical instrument a microwave radiation field at the second carrier frequency, wherein the second carrier frequency is lower than the first carrier frequency, wherein the edge of the blade of the cutting element comprises a radiating portion for the first antenna, and wherein the second antenna is mounted adjacent the edge of the blade of the cutting element, whereby both antennas emit a substantially uniform microwave radiation field along the edge of the blade of the cutting element. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification