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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0530495 (1995-09-19) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 825 인용 특허 : 0 |
Electrosurgical energy is used in combination with a surgical tool to seal vessels and vascular tissue of a patient. One of the important advances of the present system is that it can effectively seal vessels of a patient without leaving any foreign material in the body of the patient. The present s
Electrosurgical energy is used in combination with a surgical tool to seal vessels and vascular tissue of a patient. One of the important advances of the present system is that it can effectively seal vessels of a patient without leaving any foreign material in the body of the patient. The present system is also capable of sealing vessels as large as ten millimeters in diameter. Another advantage of the present system is that the surgeon can visually inspect the integrity of the seal. The invention works with a combination of pressure and controlled application of electrosurgical energy to achieve the desired result. A surgical tool is used to grasp and apply an appropriate amount of closure force to the tissue of the patient. The tool is capable of conducting electrosurgical energy to the tissue concurrently with the application of the closure force. A method for sealing vessels and vascular tissue of a patient includes the steps of applying pressure to the vessels and other tissues of the patient; applying a first level of electrosurgical power to the vessels and other tissue sufficient to melt proteins in the tissue; applying a second level of electrosurgical power to the vessels and other tissue sufficient to cause desiccation without charring; reducing the electrosurgical power substantially to zero for a length of time sufficient to allow the vessels and other tissues to cool into a new compressed form; and relieving the pressure on the tissue.
[ What is claimed is:] [1.] An electrosurgical energy delivery system for sealing interior passageways of vessels of a patient, the system comprising:a generator capable of delivering electrosurgical power by producing an output voltage and an output current, the generator having means for substanti
[ What is claimed is:] [1.] An electrosurgical energy delivery system for sealing interior passageways of vessels of a patient, the system comprising:a generator capable of delivering electrosurgical power by producing an output voltage and an output current, the generator having means for substantially terminating the power delivery to the surgical tool when the output current drops below approximately 200 milliamperes RMS;a surgical tool electrically connected to the generator for receiving the electrosurgical power, the surgical tool having electrically conductive members arranged for grasping the vessels of the patient and for transmitting the electrosurgical power thereto, the surgical tool having means for maintaining a closure force between the members sufficient to substantially close the interior passageways, anda power control circuit in the generator for automatically sequencing the electrosurgical power delivered to the surgical tool while the output voltage is kept below one-hundred-sixty volts RMS, wherein the sequence includes raising the output current to a maximum amplitude greater than about two amperes RMS while the surgical tool is applying the closure force, thereafter lowering the electrosurgical power to desiccate the vessels without charring, and hereafter terminating the electrosurgical power to the surgical tool.
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