Method and apparatus for the endoscopic treatment of deep tumors using RF hyperthermia

• US 4,920,978 A
• Filed: 08/31/1988
• Issued: 05/01/1990
• Est. Priority Date: 08/31/1988
• Status: Expired due to Term

• Current Assignee: Triangle Research and Development Corporation 6809b Davis RD Raleigh NC
• Original Assignee: Gulf Research and Development Company
• Inventors: Colvin, David P.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US07/238,824
• Time in Patent Office: 608 Days
• Field of Search: 128/303.15, 128/784, 128/785, 128/786, 128/787, 128/804, 128/736
• US Class Current: 607/102
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 18/1485 having a short rigid shaft for accessing the inner body through natural openings
• CPC Class Codes: A61B 2017/00084 Temperature
• CPC Class Codes: A61N 1/403 for thermotherapy, e.g. hyperthermia

Abstract

An attachment for an endoscope for the treatment of deep tissue tumors using RF hyperthermia is disclosed. In one embodiment, electrodes are adapted to straddle or penetrate a tumor in order to confine the interstitial current heating and are detachably fitted to the distal end of the endoscope. The electrodes are electrically coupled to an RF generating power source by means of wires that extend along the outer surface of the tubular body of the endoscope and are detachably mounted thereto.

Claims

1. An RF hyperthermia attachment for adapting endoscopes having an elongated tubular body with a proximal end and a distal end for quickly treating deep body cancerous tumors by delivering RF energy generated by a control unit thereto, said RF hyperthermia attachment comprising:

electrode means adapted to deliver electrical energy interstitially to the tumor,

means connected to said electrode means for detachably mounting said electrode means to the distal end of the endoscope,

means connected to said electrode means adapted to deliver electrical energy thereto and being adapted to be connected to the body of the endoscope, and wherein said means for delivering electrical energy to the electrode means is adapted to be detachably mounted to the external surface of the body of the endoscope.

2. An apparatus according to claim 1 wherein said electrode means comprises a positive and a negative electrode.

3. An apparatus according to claim 2 wherein said positive and negative electrodes comprise a pair of spread apart dipole electrodes adapted to straddle a tumor.

4. An apparatus according to claim 1 wherein said means for mounting said electrode means comprises a collar adapted to be detachably fitted to the distal end of the endoscope.

5. An RF hyperthermia attachment for adapting endoscopes having an elongated tubular body with a proximal end and a distal end for quickly treating deep body cancerous tumors by delivering RF energy generated by a control unit thereto, said RF hyperthermia attachment comprising:

a pair of dipole electrodes adapted to deliver electrical energy interstitially to the tumor;

means connected to said dipole electrodes for detachably fitting said dipole electrodes to the external surface of the distal end of the endoscope; and

means connected to the dipole electrodes adapted to deliver electrical energy thereto and being adapted to be connected to the body of the endoscope; and

thermistor means for measuring the RF hyperthermia induced temperature proximate the tumor, whereby the temperature of the tumor can be carefully and closely controlled.

6. An RF hyperthermia attachment for adapting endoscopes having an elongated tubular body with a proximal end and a distal end for quickly treating deep body cancerous tumors by delivering RF energy generated by a control unit thereto, said RF hyperthermia attachment comprising:

electrode means adapted to deliver electrical energy interstitially to the tumor,

means connected to said electrode means for detachably mounting said electrode means to the distal end of the endoscope,

means connected to said electrode means adapted to deliver electrical energy thereto and being adapted to be connected to the body of the endoscope, and

thermistor means for measuring the RF hyperthermia induced temperature proximate the tumor and for transmitting a signal representative of the temperature to a control unit.

7. An apparatus according to claim 6 wherein said electrode means comprises a positive and a negative electrode.

8. An apparatus according to claim 7 wherein said positive and negative electrodes comprise a pair of spaced apart dipole electrodes adapted to straddle a tumor.

9. An apparatus according to claim 6 wherein said attachment includes a closed loop feedback circuit that employs said signal representative of the temperature to precisely measure and control the temperature of said electrode means.

10. A method of treating deep tissue tumors using RF hyperthermia administered with an endoscope of the type adapted to be inserted into a body cavity having an elongated tubular body, a proximal end and a distal end and wherein an electrode adapted to deliver electrical energy to the tumor is connected proximate the distal end of the endoscope and wherein wires connect the electrode to a power source and a control unit comprising the steps of:

inserting the endoscope including the electrode and the wires into the body cavity,

positioning the electrode in contacting relation with the tumor to be treated,

transferring electrical energy from the electrode into the tumor for a predetermined period of time,

measuring the temperature proximate the electrode during treatment.

11. The method according to claim 10 wherein the tumor is heated to a temperature of approximately 48 degrees centigrade and is maintained at that temperature for approximately one minute.

12. The method of claim 10 wherein the tumor is heated to a temperature of approximately 50 degrees centigrade and is maintained at that temperature for approximately 30 seconds.

13. The method according to claim 10 further including the step of feeding back to the control unit a signal representative of the temperature of the electrode.

14. The method according to claim 13 further including the step of utilizing the signal representative of the electrode temperature in a closed loop feedback circuit to precisely measure and control the electrode temperature.