Device for tumor diagnosis and methods thereof

• US 6,832,111 B2
• Filed: 11/05/2001
• Issued: 12/14/2004
• Est. Priority Date: 07/06/2001
• Status: Expired due to Fees

• Current Assignee: Hosheng Tu, Rodolfo C. Quijano
• Original Assignee: Hosheng Tu, Rodolfo C. Quijano
• Inventors: Tu, Hosheng, Quijano, Rodolfo C.
• Primary Examiner(s): Winakur, Eric F.
• Assistant Examiner(s): Kremer, Matthew J
• Application Number:
  US10/011,062
• Publication Number:
  US 20030009110A1
• Time in Patent Office: 1,135 Days
• Field of Search: 600/547, 600/549
• US Class Current: 600/547
• CPC Class Codes: A61B 5/053 Measuring electrical impedance or conductance of a portion of the body
• CPC Class Codes: A61B 5/0538 invasively, e.g. using a catheter
• CPC Class Codes: A61B 5/4381 Prostate evaluation or disorder diagnosis

Abstract

A method and devices for differentiating in a given area of tissue a tumorous tissue from a normal tissue, the method comprising measuring a plurality of tissue impedance over a range of tissue temperatures and comparing the measured tissue impedance with reference tissue impedance of the normal tissue adapted for tissue differentiation. The management of tissue temperatures may be accomplished with a probe arrangement comprising two elements of different electromotive potential conductively connected at a probe junction, and passing an electrical current through the elements to reduce or raise a temperature of the probe junction in accordance with the Peltier effect.

Claims

1. A method of differentiating in a given area of tissue a tumorous tissue from a normal tissue, the method comprising measuring a plurality of tissue impedances over a range of tissue temperatures and comparing said measured tissue impedances with reference tissue impedances of the normal tissue adapted for tissue differentiation, wherein said measured tissue impedances are acoustic tissue impedances.

2. The method of claim 1, further comprising delivering a therapeutic means for treating the tumorous tissue at about said given area of tissue.

3. The method of claim 2, wherein the therapeutic means is selected from a group consisting of drug, chemotherapy, radiation, and combination thereof.

4. The method of claim 1, further comprising a step of providing thermal energy to treat the tumorous tissue.

5. The method of claim 4, wherein the thermal energy is selected from a from a group consisting of radiofrequency energy, ultrasound energy, infrared energy, microwave energy, and laser energy.

6. The method of claim 1, further comprising a step of providing cryogenic energy to treat the tumorous tissue.

7. A method of differentiating in a given area of tissue a tumorous tissue from a normal tissue, the method comprising:

measuring a plurality of tissue impedances over a range of tissue temperatures and comparing said measured tissue impedances with reference tissue impedances of the normal tissue adapted for tissue differentiation; and

inserting a probe at about said given area of tissue, wherein said probe is configured to comprise a Peltier effect for achieving said range of tissue temperatures, wherein said probe further comprises at least three spaced apart micro-electrode elements for measuring tissue impedance, the measured tissue impedance from a first and a second of the at least three micro-electrode elements being compared to the measured tissue impedance from the second and a third of the at least three micro-electrode elements for tissue differentiation.

8. The method of claim 7 further comprising a step of providing thermal energy to treat the tumorous tissue, wherein the thermal energy is selected from a group consisting of radiofrequency energy, ultrasound energy, infrared energy, microwave energy, and laser energy.