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 Assignee: Vesta Medical, Inc., Palo Alto
 Appl. No.: 319,216
 Filed: Oct. 6,1994
Related U.S. Application Data
 Continuation-in-part of Ser. No. 877,567, May 1, 1992, Pat. No. 5,277,201, and a continuation-in-part of Ser. No. 46,683, Apr. 14, 1993, Pat. No. 5,443,470, and a continuation-in-part of Ser. No. 106,601, Aug. 16, 1993, Pat. No. 5,443,463, and a continuation-in-part of Ser. No. 136,098, Oct. 14, 1993, abandoned.
 Int. CI.6 A61N 5/00
 U.S. CI 607/98; 607/99; 606/32;
 Field of Search 607/98, 99; 606/32,
606/33, 34, 37-40, 41, 48-50
 References Cited
U.S. PATENT DOCUMENTS
3516830 11/1986 Germany. WO87/01276 3/1987 WEPO . WO90/07303 12/1990 WIPO.
"Hyperthermia Overview Using Microwave Antennas", Invited Lectures, Thomas P. Ryan, M.D. Thermoradiotherapy, C. T. Coughlin, M.D.
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"Endometrial Ablation", Therapeutic Hysteroscopy: Indications and Techniques, pp. 148-163, W. W. Babcock et al. "Uterine Resectoscopes for Endometrial Ablation and Resection", Karl Storz.
(List continued on next page.)
Primary Examiner—Lee S. Cohen
Attorney, Agent, or Firm—William B. Walker
An endometrial ablation device and a method of manufacturing and using the device. An RF current is passed through an endometrium to heat it. An electroconductive expandable member such as a balloon is used as the medium for passing the current and causing the heating of the endometrium. The power delivered from a power source to the balloon is selectively provided to a plurality of electrode area segments on the balloon with each of the segments have a thermistor associated with it whereby temperature is monitored and controlled by a feedback arrangement from the thermistors. The selective application of power is provided on the basis of a switching arrangement which provides either monopolar or bipolar energy to the electrodes. The method of manufacturing the ablation device includes using commercially available stretchable sheet material or providing a mandrel or support base and coating the mandrel or base with an uncured emulsion. The emulsion is then cured to form a bladder-like coating. The coating is thereafter removed from the mandrel or base to form a bladder. Electrons and temperature sensors are formed on or secured to the bladder during or after the curing process and a fluid delivery tube is secured to the bladder for inflating the bladder.
4 Claims, 19 Drawing Sheets
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