WO1995010326B1 - Bipolar/monopolar endometrial ablation device and method - Google Patents

Bipolar/monopolar endometrial ablation device and method

Info

Publication number
WO1995010326B1
WO1995010326B1 WO9510326B1 WO 1995010326 B1 WO1995010326 B1 WO 1995010326B1 WO 9510326 B1 WO9510326 B1 WO 9510326B1
Authority
WO
WIPO (PCT)
Prior art keywords
electrodes
means
bladder
mandrel
ablation device
Prior art date
Application number
Other languages
French (fr)
Publication date

Links

Abstract

This invention is an endometrial ablation device and a method of manufacturing and using the device. An RF current is passed through an endometrium (22) to heat it. An electro-conductive expandable member such as a balloon (10) is used as the medium for passing the current and causing the heating of the endometrium (22). The power delivered from a power source to the balloon (10) is selectively provided to a plurality of electrode area segments (34) on the balloon (10) with each of the segments (34) having a thermistor (32) associated with it whereby temperature is monitored and controlled by a feedback arrangement from the thermistors (32). The method of manufacturing the ablation device includes using commercially available stretchable sheet material or providing a mandrel (324) or support base (352) and coating the mandrel or base with an uncured emulsion. The emulsion is then cured to form a bladder-like coating, which is thereafter removed from the mandrel or base to form a bladder (320).

Claims

AMENDED CLAIMS
[received by the International Bureau on 5 April 1995 (05.04.95); original claims 1, 3, 4 and 27 amended; new claim 32 added; remaining claims unchanged (5 pages)]
1. An apparatus for selectively applying RF energy to a body organ, said apparatus comprising: an electrode means for effecting electrical contact with tissue of said body organ; a radio frequency power means for providing current to said electrode means at a frequency greater than 250 kHz; and switching means for receiving an output from said radio frequency power means and for controlling the power to said electrodes, wherein said switching means includes a first means for providing bipolar energy to said electrode means, a second means for providing monopolar energy to said electrode means, and a third means for selecting one of said first and second means, and wherein selected portions of said tissue are heated at a uniform temperature between 45°C and 90°C by passing current through said selected portions of said tissue.
2. The apparatus according to Claim l wherein said first means further includes a means for delivering said RF energy in a bipolar mode between selected ones of a plurality of electrodes.
3. A method of heating body organ tissue by the selective application of RF energy to said tissue, comprising the steps of: providing a plurality of electrodes in electrical contact with said body organ; providing a source of radio frequency energy to said plurality of electrodes; and controlling said radio frequency energy to the electrodes so as to heat selected portions of the body organ to a uniform temperature between 45°C and 90°C by passing current through the selected portions of the body organ, and so as to provide for one of bipolar and monopolar application of energy to said plurality of electrodes.
4. The method according to Claim 3 wherein the step of controlling said radio frequency energy includes selectively providing bipolar energy to selected pairs of said plurality of electrodes.
5. A method of manufacturing an ablation device includes providing a mandrel; securing electrodes to the mandrel; coating the mandrel with an uncured emulsion; curing the emulsion to form a bladder-like coating over the mandrel; and removing the coating from the mandrel.
6. A method of Claim 5 wherein securing the electrodes to the mandrel includes securing the electrodes by means of an adhesive. 4 2
7. A method of Claim 5 wherein the step of coating the mandrel includes dipping the mandrel into the uncured emulsion.
27. An ablation device for passing current through tissue of a body organ comprising: an expandable bladder having an opening; a fluid delivery tube secured to the bladder so as to be in communication with the opening; a plurality of electrodes defined on the bladder; a radio frequency power means for providing current to said electrodes; and switching means for selectively connecting the radio frequency power means to the electrodes so as to heat selected portions of said tissue at a uniform temperature between 45°C and 90°C by passing current through the selected portions of the tissue.
28. An ablation device of Claim 27 which includes a temperature sensor mounted on at least one of the electrodes.
29. An ablation device of Claim 27 which includes a tube extending through the bladder and opening to an outer surface of the bladder at a distal end of the bladder.
4 4
30. An ablation device of Claim 27 which includes a moveable sleeve movably mounted over the fluid delivery tube.
31. An ablation device of Claim 27 which includes a catheter for receiving the fluid delivery tube and bladder.
32. An ablation device of Claim 27 wherein the electrodes are mounted on one of inner and outer surfaces of the bladder.

Family

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9247989B2 (en) 1996-04-12 2016-02-02 Cytyc Surgical Products Moisture transport system for contact electrocoagulation
US9539019B2 (en) 2007-04-06 2017-01-10 Hologic, Inc. Uterine fibroid tissue removal device
US9554853B2 (en) 1998-05-08 2017-01-31 Hologic, Inc. Radio-frequency generator for powering an ablation device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9247989B2 (en) 1996-04-12 2016-02-02 Cytyc Surgical Products Moisture transport system for contact electrocoagulation
US9554853B2 (en) 1998-05-08 2017-01-31 Hologic, Inc. Radio-frequency generator for powering an ablation device
US9539019B2 (en) 2007-04-06 2017-01-10 Hologic, Inc. Uterine fibroid tissue removal device

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