System and methods for identifying tissue and vessels
First Claim
1. A method of determining a tissue parameter for an energy-based tissue-sealing system, comprising:
- grasping tissue using two jaw members;
applying a probing signal to the tissue, the probing signal being configured to interact with the tissue;
over an interval longer than an interval between two successive cardiac contractions, monitoring a response signal in response to the probe signal and changes in distance between the two jaw members caused by the cardiac contractions;
processing, using a processor, the monitored cardiac contractions, the changes in distance, and the response signal to determine a tissue parameter by;
determining amplitudes of the response signal in the tissue over the interval longer than the interval between two successive cardiac contractions;
determining levels of blood circulation in the tissue based upon the amplitudes of the response signal and the changes in distance between the two jaw members over the interval longer than the interval between two successive cardiac contractions; and
determining a tissue parameter based upon the levels of blood circulation; and
adjusting energy output from an energy output stage of the energy-based tissue-sealing system based on the tissue parameter.
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Accused Products
Abstract
A surgical system and corresponding methods for identifying tissue or vessels and assessing their conditions includes a probing signal source for applying a probing signal to the tissue and a response signal monitor for monitoring a response signal that varies according to the level of blood circulation in the tissue or vessels. The response signal monitor monitors the response signal over an interval equal to or longer than an interval between two successive cardiac contractions. The surgical system includes a microprocessor that analyzes the amplitude and/or phase of the response signal to determine the level of blood circulation in the tissue or in different portions of the tissue, and determines a tissue parameter based upon the level of blood circulation. The surgical system may monitor a cardiac signal related to cardiac contractions and correlate the response signal and the cardiac signal to determine a level of blood circulation in the tissue.
40 Citations
13 Claims
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1. A method of determining a tissue parameter for an energy-based tissue-sealing system, comprising:
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grasping tissue using two jaw members; applying a probing signal to the tissue, the probing signal being configured to interact with the tissue; over an interval longer than an interval between two successive cardiac contractions, monitoring a response signal in response to the probe signal and changes in distance between the two jaw members caused by the cardiac contractions; processing, using a processor, the monitored cardiac contractions, the changes in distance, and the response signal to determine a tissue parameter by; determining amplitudes of the response signal in the tissue over the interval longer than the interval between two successive cardiac contractions; determining levels of blood circulation in the tissue based upon the amplitudes of the response signal and the changes in distance between the two jaw members over the interval longer than the interval between two successive cardiac contractions; and determining a tissue parameter based upon the levels of blood circulation; and adjusting energy output from an energy output stage of the energy-based tissue-sealing system based on the tissue parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification