[특허]Methods of sealing vessels using plasma

[미국특허] Methods of sealing vessels using plasma 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61B-018/04
출원번호	US-0696411 (2010-01-29)
등록번호	US-8613742 (2013-12-24)
발명자 / 주소	Suslov, Nikolay
출원인 / 주소	Plasma Surgical Investments Limited
대리인 / 주소	Day, Jones
인용정보	피인용 횟수 : 1 인용 특허 : 127

초록 ▼

A method for sealing fluid-carrying vessels in a living organism using high temperature plasma is disclosed. A flow rate of 0.25-0.5 L/min of room-temperature plasma generating gas and the initial temperature of the discharged plasma of 12.5-15.5 kK ensure a laminar plasma flow and its ability to penetrate into the vessel. The plasma flow is directed into the vessel, where it keeps a portion of the vessel free of liquid. Heat is transferred to the vessel walls, and the denaturing of collagen in the vessel walls causes the walls to contract until complete occlusion occurs. The method may be used with devices adapted for tissue dissection and coagulation.

대표청구항 ▼

1. A method of sealing an opening of a liquid-carrying vessel in a living organism, comprising: a. directing a plasma flow into an opening end of the liquid-carrying vessel;b. evaporating a liquid from a portion of the liquid-carrying vessel with the plasma flow, wherein the portion extends from the opening end of the liquid-carrying vessel to a depth equal to at least the liquid-carrying vessel diameter;c. contracting the walls of the liquid-carrying vessel in the portion of the liquid-carrying vessel from which the liquid is evaporated by heating the walls; andd. forming a seal from the contracted walls of the liquid-carrying vessel, wherein a diameter of the liquid carrying vessel is at least 1 mm. 2. The method of claim 1, further comprising generating the plasma flow with an initial temperature of at least 11 kK. 3. The method of claim 2, wherein the generated plasma flow has a diameter of at least 0.45 mm when discharged. 4. The method of claim 1, wherein the trajectory of the plasma flow is at an angle of less than 20° to an axis of the liquid-carrying vessel at the opening. 5. The method of claim 4, wherein the trajectory of the plasma flow is substantially aligned with the axis of the liquid-carrying vessel at the opening end. 6. The method of claim 1, wherein contracting the walls of the liquid-carrying vessel comprises denaturing collagen in the walls of the liquid-carrying vessel. 7. The method of claim 1, wherein at the opening of the liquid-carrying vessel the plasma flow is laminar. 8. The method of claim 7, wherein the plasma flow has a substantially parabolic temperature and velocity distribution at the opening of the liquid-carrying vessel. 9. The method of claim 2, wherein evaporating blood from the portion of the liquid-carrying vessel comprises cooling plasma from the plasma flow, and wherein the ratio of the density of the cooled plasma and the density of the plasma in the generated plasma flow is greater than 30. 10. The method of claim 1, further comprising directing the plasma flow to an area near the opening end of the liquid-carrying vessel. 11. A method comprising: a. discharging a plasma flow using a flow of a plasma-generating gas with a flow rate of 0.25-0.5 L/min at room temperature, the plasma flow having a diameter of at least 0.45 mm when discharged, the plasma flow having a temperature of at least 11 kK when discharged; andb. directing the plasma flow into an opening of a vessel having a diameter of at least 1 mm in a living organism. 12. The method of claim 11, further comprising directing the plasma flow at an area surrounding the opening of the vessel. 13. The method of claim 12, wherein directing the plasma flow at the area surrounding the opening of the blood vessel is performed with a substantially circular motion around the opening of the vessel. 14. The method of claim 11, wherein the vessel is a blood vessel. 15. The method of claim 11, wherein the plasma flow is discharged at a distance of 10-30 mm from the opening of the vessel. 16. The method of claim 15 further comprising, after directing the plasma flow into the opening of the vessel for at least 0.5 s, decreasing the distance. 17. The method of claim 12, wherein the plasma flow is directed into the opening of the blood vessel at an angle of at most 20° to the axis of the blood vessel at the opening. 18. A method of sealing a fluid-carrying vessel in a living organism, comprising: a. directing a plasma flow into an opening end of the fluid-carrying vessel;b. contracting walls of the fluid-carrying vessel; andc. forming a seal from the contracted walls of the fluid-carrying vessel, wherein a diameter of the fluid-carrying vessel is at least 1 mm. 19. The method of claim 18, wherein the fluid-carrying vessel is a gas-carrying vessel. 20. The method of claim 19, wherein the gas-carrying vessel is a bronchus. 21. The method of claim 18, further comprising generating the plasma flow, wherein a substantial portion of the flow has a temperature of least 11 kK.

이 특허에 인용된 특허 (127) 인용/피인용 타임라인 분석

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이 특허를 인용한 특허 (1) 인용/피인용 타임라인 분석

Suslov, Nikolay; Rubiner, Igor, Plasma-generating device, plasma surgical device and use of a plasma surgical device.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Methods of sealing vessels using plasma 원문보기

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[미국특허] Methods of sealing vessels using plasma 원문보기

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