Methods and Systems for Treating BPH Using Electroporation

a technology of electroporation and tissue site, applied in the field of electroporation, can solve the problems of inability to closely monitor and control

Inactive Publication Date: 2009-11-26
RUBINSKY BORIS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018]Accordingly, an object of the present invention is to provide improved systems and methods for treating BPH tissue sites using electroporation.
[0019]Another object of the present invention is to provide systems and method for treating BPH tissue sites using electroporation using sufficient electrical pulses to induce electroporation of cells in the BPH tissue site, without creating a thermal damage effect to a majority of the BPH tissue site.
[0024]Yet another object of the present invention is to provide systems and methods for treating BPH tissue sites using electroporation that is performed in a controlled manner, with a proper selection of voltage application time.
[0027]Still another object of the present invention is to provide systems and methods for treating BPH tissue sites using electroporation that is performed in a controlled manner to create a tissue effect in the cells at the BPH tissue site while preserving surrounding tissue.

Problems solved by technology

However, when used deep in the body, as opposed to the outer surface or in the vicinity of the outer surface of the body, it has a drawback that is typical to all minimally invasive surgical techniques that occur deep in the body, it cannot be closely monitored and controlled.

Method used

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  • Methods and Systems for Treating BPH Using Electroporation
  • Methods and Systems for Treating BPH Using Electroporation
  • Methods and Systems for Treating BPH Using Electroporation

Examples

Experimental program
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Effect test

example 1

[0082]An area of the BPH tissue site is imaged. Two bi-polar electrodes 12, with sharpened distal ends, are introduced into in the BPH tissue site through the rectal wall of the patient. The area of the BPH tissue site to be ablated is positioned between the two electrodes. Imaging is used to confirm that the mono-polar electrodes are properly placed. The two mono-polar electrodes are separated by a distance of 5 mm to 10 cm at various locations of the BPH tissue site. Pulses are applied with a duration of 5 microseconds to about 62 seconds each. Monitoring is preformed using ultrasound. The BPH tissue site is monitored. In response to the monitoring, pulses are adjusted to maintain a temperature of no more than 100 degrees Celsius. A voltage gradient at the BPH tissue site in a range of from about 50 volt / cm to about 1000 volt / cm is created. A volume of the BPH tissue site of about 1 cm by 0.5 cm undergoes cell necrosis.

example 2

[0083]An area of the BPH tissue site is imaged. Two mono-polar electrodes 12, are introduced into in the BPH tissue site through the urethra of the patient. The area of the BPH tissue site to be ablated is positioned between the two mono-polar electrodes 12. Imaging is used to confirm that the electrodes are properly placed. The two mono-polar electrodes 12 are separated by a distance of 5 mm to 10 cm at various locations of the BPH tissue site. Pulses are applied with a duration of about 90 to 110 microseconds each. Monitoring is performed using a CT scan. The BPH tissue site is monitored. In response to the monitoring, pulses are adjusted to maintain a temperature of no more than 75 degrees Celsius. A voltage gradient at the BPH tissue site in a range of from about 50 volt / cm to about 5000 volt / cm is created. The BPH tissue site undergoes cell necrosis.

example 3

[0084]An area of the BPH tissue site is imaged. The array 16 of electrodes are introduced into in the BPH tissue site through the peritoneum of the patient. The array 16 of electrodes is positioned in a surrounding relationship to the BPH. Imaging is used to confirm that the electrodes are properly placed. Pulses are applied with a duration of about 100 microseconds each. A monitoring electrode 18 is utilized. Prior to the full electroporation pulse being delivered a test pulse is delivered that is about 10% of the proposed full electroporation pulse. The test pulse does not cause irreversible electroporation. The BPH tissue site is monitored. In response to the monitoring, pulses are adjusted to maintain a temperature of no more than 60 degrees Celsius. A voltage gradient at the BPH tissue site in a range of from about 50 volt / cm to about 8000 volt / cm is created. The BPH tissue site undergoes cell necrosis.

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Abstract

A system for treating benign prostate hyperplasia (BPH) of a prostate. At least first and second mono-polar electrodes are configured to be introduced at or near a BPH tissue site of the prostate gland of the patient. A voltage pulse generator is coupled to the first and second mono-polar electrodes. The voltage pulse generator is configured to apply sufficient electrical pulses between the first and second mono-polar electrodes to induce electroporation of cells in the BPH tissue site, to create necrosis of cells of the BPH tissue site, but insufficient to create a thermal damaging effect to a majority of the BPH tissue site.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional application of U.S. application Ser. No. 11 / 166,974, filed Jun. 24, 2005, which is fully incorporated herein by reference. This application is also related to U.S. Ser. Nos. 11 / 165,881, 11 / 165,908 and 11 / 165,961 all of which were filed on Jun. 24, 2005 and all of which applications are fully incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates generally to electroporation, and more particularly to systems and methods for treating BPH tissue sites of a patient using electroporation.DESCRIPTION OF THE RELATED ART[0003]Electroporation is defined as the phenomenon that makes cell membranes permeable by exposing them to certain electric pulses (Weaver, J. C. and Y. A. Chizmadzhev, Theory of electroporation: a review. Bioelectrochem. Bioenerg., 1996. 41: p. 135-60). The permeabilization of the membrane can be reversible or irreversible as a function of the electrical parameters use...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61N1/04
CPCA61N1/0412A61N1/327A61N1/0476A61B2018/00613
Inventor RUBINSKY, BORISONIK, GARYMIKUS, PAUL
Owner RUBINSKY BORIS
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