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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0609373 (1990-11-05) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 385 인용 특허 : 0 |
A urethral inserted applicator for prostate hyperthermia includes a multi-tube, balloon type catheter. The catheter includes first and second closed end fluid dry tubes, respectively, for a helical coil electrode type applicator, and an electromagnetic field compatible temperature sensor for measuri
A urethral inserted applicator for prostate hyperthermia includes a multi-tube, balloon type catheter. The catheter includes first and second closed end fluid dry tubes, respectively, for a helical coil electrode type applicator, and an electromagnetic field compatible temperature sensor for measuring the temperature of the prostate tissue, and an open fluid receiving tube enabling urine drainage from the bladder. A radiofrequency source supplies electromagnetic energy to the applicator. A control unit contains a comparator which is connected to the temperature sensor and a temperature reference device for comparing the actual tissue temperature level with a desired temperature level and output control signals to the radiofrequency generator for controlling the output to the applicator. The coil type applicator is an elongated coil connected to the center conductor of a coaxial cable. A second electrode is connected to the outer conductor of the connecting cable providing a ground current return of the heating current. A sheet or sheath of insulation material covers the coil electrode for insulating the coil from the tissue and the thickness of the sheet may be varied to provide uniform tissue heating along the length of the coil. The balloon of the catheter engages the body\s bladder to position the applicator properly during the treatment.
An electromagnetic capacitive coupling applicator apparatus for treatment of benign prostatic hyperplasia comprising: catheter means for insertion into the urethra; applicator means carried by the catheter means, said applicator means including an applicator and a connector means for connecting the
An electromagnetic capacitive coupling applicator apparatus for treatment of benign prostatic hyperplasia comprising: catheter means for insertion into the urethra; applicator means carried by the catheter means, said applicator means including an applicator and a connector means for connecting the applicator to a source of electromagnetic energy, said applicator forming a first electrode adapted to interact with second electrode means placed with respect to the applicator so as to be capacitively coupled thereto so that heating current supplied by the source of electromagnetic energy sufficient to elevate the temperature of tissue surrounding the applicator to a preselected temperature and for maintaining the preselected temperature during treatment will flow between the applicator and second electrode means during treatment; positioning means for positioning and maintaining the positioning of the catheter means in the urethra so that the applicator means carried by the catheter means is and remains positioned adjacent the prostate tissue to be treated for as long as desired by the user; and temperature sensor supporting means attached to the catheter means for supporting a temperature sensing means in operative association with the applicator of the applicator means for measuring the temperature of the tissue surrounding the applicator.
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