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US 6,546,787 B1Granted
Means and method for modeling and treating specific tissue structures
AssigneeRegents of the University of Minnesota
InventorsPeter J. Schiller, Angela K. Drexler, David R. Wulfman, Ronald C. McGlennen
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Abstract
Diagnostic imaging methods, methods of detecting the margin of tissue structures and bioresponsive needle systems are disclosed. The methods rely on the use of strain signals provided by a strain gage mounted on the wall of one or more needles as the needle or needles are moved through tissue. The systems employ a strain gage mounted on the wall of the needle and a strain monitor providing feedback to a user.
Claims18
A method of detecting at least one margin of a tissue structure of interest, comprising:
- a) providing a needle having a wall and a distal tip, a strain gage being connected to the needle wall at two spaced-apart locations, the strain gage generating a strain signal in response to strain on the wall of the needle;
- b) inserting the distal tip of the needle into a patient's tissue and advancing the needle distally into the tissue;
- c) monitoring the strain signal generated during said distal advancement of the needle;
- and
- d) analyzing the strain signal to detect the margin of the tissue structure.
2 more elements
A bioresponsive needle system comprising:
- a) an elongated needle adapted to be inserted into a patient's tissue, the needle having a lumen and a wall;
- b) a strain gage connected to the wall at two spaced-apart locations, the strain gage generating a strain signal in response to strain on the wall of the needle;
- and
- c) a strain monitor operatively connected to the strain gage and adapted to provide a user with feedback regarding the strain on the wall.
1 more element
Dependencies are inferred from the claim text.