Method And Device For Detecting Thermal Effects Of Tissue Ablation On A Tissue Of A Patient

• US 20140257036A1
• Filed: 03/11/2014
• Published: 09/11/2014
• Est. Priority Date: 03/11/2013
• Status: Abandoned Application

• Current Assignee: Ohio University
• Original Assignee: Ohio University
• Inventors: Choi, JungHun, Robert, Randolph B. III
• Application Number:
  US14/203,990
• Publication Number:
  US 20140257036A1
• Time in Patent Office: Days
• US Class Current: 600/104
• CPC Class Codes: A61B 10/06 Biopsy forceps , e.g. with cup-shaped jaws
• CPC Class Codes: A61B 18/1233 with circuits for assuring patient safety
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2018/00494 Stomach, intestines or bowel
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00738 Depth, e.g. depth of ablation

Abstract

A method and device for detecting thermal effects of tissue ablation on a tissue of a patient includes an endoscope, a biopsy forceps, and an electrical measurement circuit. The method includes measuring a first value of an electrical property of the tissue and removing at least a portion of the tissue with the hot biopsy forceps. The method also includes measuring a second value of the electrical property of the remaining tissue. Accordingly, the electrical measurement circuit is configured to correlate the difference between the first and second values to a depth of ablation.

Claims

1. A method of detecting thermal effects of tissue ablation on a tissue of a patient, comprising;

measuring a first value of an electrical property of the tissue before removing at least a portion of the tissue with a hot biopsy forceps at an ablation region;

removing at least the portion of the tissue with the hot biopsy forceps at the ablation region having a remaining portion of the tissue;

measuring a second value of the electrical property of the remaining tissue; and

correlating the difference between the first and second values to a depth of ablation.

2. The method of claim 1 wherein the electrical property of the tissue is capacitance.

3. The method of claim 1 further comprising repeating measuring the first value, removing at least the portion of the tissue, measuring the second value, and correlating the difference between the first and second values to the depth of ablation.

4. The method of claim 1 wherein the portion of the tissue is a polyp tissue and further comprises:

performing a colonoscopy on the patient with an endoscope having a visualization equipment and the hot biopsy forceps; and

identifying the polyp tissue within a colon of the patient with the visualization equipment.

5. A device for detecting thermal effects of tissue ablation on a tissue of a patient during a colonoscopy, comprising;

an endoscope having a shaft extending to an end portion, the endoscope operatively connected to an endoscope control configured for operating the endoscope during the colonoscopy;

a biopsy forceps having a head configured for removing at least a portion of the tissue at an ablation region, the biopsy forceps extending through the end portion of the endoscope and operatively connected to a biopsy forceps control for operating the biopsy forceps during the colonoscopy; and

an electrical measurement circuit operatively connected to the biopsy forceps and configured to detect an electrical property of the ablation region.

6. The device of claim 5 wherein the endoscope further includes visualization equipment for identifying the tissue for tissue ablation.

7. The device of claim 5 wherein the electrical measurement circuit is a capacitive measurement circuit configured to measure a capacitive value of the ablation region.

8. The device of claim 7 further comprising:

a CPU operatively connected to the capacitive measurement circuit and configured to correlate the measured capacitance value to a depth of ablation for detecting the effects of ablation on the patient.