IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0894174
(1992-06-09)
|
| 우선권정보 |
NL-19900000356 (1990-02-14) |
|
발명자
/ 주소 |
- Griep, Wilhelmus A. M.
- Nap, Cornelis P.
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
Gerstman, Ellis & McMillin
|
| 인용정보 |
피인용 횟수 :
54 인용 특허 :
23 |
초록
▼
A drainage catheter comprises a tubular basic catheter body defining separate catheter lumens respectively comprising a pressure channel and a discharge channel. Connectors are provided at the proximal end of the catheter for respectively connecting the pressure channel to a source of liquid under p
A drainage catheter comprises a tubular basic catheter body defining separate catheter lumens respectively comprising a pressure channel and a discharge channel. Connectors are provided at the proximal end of the catheter for respectively connecting the pressure channel to a source of liquid under pressure and the discharge channel to a discharge receptacle. An inlet opening is positioned in the side of the catheter adjacent the distal end thereof. The discharge channel communicates with the inlet opening, while the pressure channel extends from the proximal and distally forward of the inlet opening and then curves rearwardly to join the discharge channel at the inlet opening. In one embodiment of this invention the pressure channel defines a distal portion that is of rigid and fixed dimension to define a spray nozzle of precise, unchanging dimensions. Also, relatively narrow forward and/or side ports are provided between the pressure channel and the exterior to bathe the distal catheter end in x-ray contrast fluid, for example. Likewise, a syringe or the like may be connected to the proximal discharge channel end.
대표청구항
▼
1. A drainage catheter which comprises a flexible, tubular basic catheter body defining separate catheter lumens respectively comprising a pressure channel and a discharge channel; connector means at a proximal end of said catheter for respectively connecting the pressure channel to a source of liqu
1. A drainage catheter which comprises a flexible, tubular basic catheter body defining separate catheter lumens respectively comprising a pressure channel and a discharge channel; connector means at a proximal end of said catheter for respectively connecting the pressure channel to a source of liquid under pressure and the discharge channel to discharge means; and inlet opening positioned in the side of said catheter adjacent the distal end thereof, said discharge channel communicating with said inlet opening, said pressure channel extending from said proximal end distally forward of said inlet opening and then curving rearwardly to join said discharge channel at said inlet opening, said pressure channel defining a spray nozzle to direct pressurized fluid in the pressure channel across said inlet opening and into said discharge channel to create a suction adjacent said inlet opening, said spray nozzle being narrowed at one end to form a jet, said one end being positioned to point across said inlet opening and into said discharge channel, and at least one narrow passage opening defined on a side remote from said inlet opening and adjacent said distal end in an outer wall portion of said catheter between said pressure channel and the exterior. 2. The catheter according to claim 1 in combination with said discharge means, in which said discharge means is connected to said discharge channel and in which said discharge means defines expansible chamber means. 3. The drainage catheter of claim 1 in combination with said discharge means wherein said discharge means defines a syringe. 4. A drainage catheter which comprises a tubular basic catheter body defining separate catheter lumens respectively comprising a pressure channel and a discharge channel; connector means at a proximal end of said catheter for respectively connecting the pressure channel to a source of liquid under pressure and the discharge channel to discharge means; an inlet opening positioned in the side of said catheter adjacent the distal end thereof, said discharge channel communicating with said inlet opening, said pressure channel extending from said proximal end distally forward of said inlet opening and then curving rearwardly to join said discharge channel at said inlet opening to direct pressurized fluid from said pressurized channel across said inlet opening and into said discharge channel to create a suction adjacent said inlet opening; and at least one relatively narrow passage opening positioned adjacent said distal end on a side remote from said inlet opening in an outer wall portion of said catheter between said pressure channel and the exterior. 5. The catheter of claim 4 in which said at least one narrow passage opening is formed in the distal end of said catheter between said pressure channel and the exterior. 6. The catheter of claim 4 in combination with said discharge means, in which said discharge means comprises means for immediately varying the pressure in said discharge channel, at the discretion of the user, to block discharge flow through the discharge channel and to alternatively permit said discharge flow through the discharge channel. 7. A drainage catheter which comprises a tubular basic catheter body defining separate catheter lumens respectively comprising a pressure channel and a discharge channel; connector means at a proximal end of said catheter for connecting the pressure channel to a source of liquid under pressure; an inlet opening positioned in the side of said catheter adjacent the distal end thereof, said discharge channel communicating with said inlet opening, said pressure channel extending from said proximal end distally forward of said inlet opening, and curving rearwardly to face said discharge channel at said inlet opening, and defining a proximally facing jet nozzle positioned to direct pressurized fluid from the pressure channel across said inlet opening and into said discharge channel to create a suction adjacent to said inlet opening, said discharge channel at said proximal end being connected to controllably expansible chamber means, whereby expansion of said chamber means permits said suction to be created adjacent the inlet opening, while prevention of expansion of said chamber means prevents said suction so that said pressurized fluid migrates outwardly through said inlet opening, in which, adjacent said distal end, at least one relatively narrow passage opening is defined on a side remote from said inlet opening in an outer wall portion of said catheter between said pressure channel and the exterior. 8. The catheter of claim 7 in which said expansible chamber means is a syringe. 9. The catheter of claim 8 in which said pressure channel is filled with pressurized x-ray contrast fluid. 10. The catheter of claim 7 in which said at least relatively narrow passage opening is formed in the distal end of said catheter between said pressure channel and the exterior. 11. The method of removing unwanted materials from blood vessels, which comprises: introducing a catheter into a blood vessel and advancing said catheter to bring a distally positioned side opening of said catheter adjacent said unwanted materials; passing aqueous liquid through and out of said catheter into contact with said unwanted materials; inducing a reduced pressure through said side opening by passing a jet of said aqueous liquid positioned within said catheter adjacent said side opening, to draw said aqueous liquid outside of said catheter and unwanted materials through said side opening into said catheter, and conveying said drawn aqueous liquid and unwanted materials proximally through a discharge channel defined in said catheter for removal from the body, and further providing intermittent, alternating reduced and elevated pressure to the discharge channel to alternatingly cause said liquid to flow inwardly and outwardly through said opening. 12. The method of claim 11 in which said jet of liquid is proximally directed substantially axially with said catheter. 13. The method of claim 12 in which at least some of said aqueous liquid is passed out of said catheter as a pressurized stream through opening means in the catheter other than said discharge channel. 14. The method of claim 11 in which said aqueous liquid is x-ray contrast media. 15. A method of operating a catheter which comprises a tubular, basic catheter body having a pair of separate lumens defining a pressure channel and a discharge channel, and having an inlet opening positioned adjacent the distal end of said catheter, which inlet opening communicates with said discharge channel, said pressure channel extending distally of said inlet opening and curving rearwardly again to define a spray nozzle positioned adjacent said inlet opening to direct fluids from said pressure channel across said inlet opening into said discharge channel, comprising the steps of: inserting said catheter into the body of a patient; applying pressurized fluid to said pressure channel to cause pressurized fluid to pass through said spray nozzle across said inlet opening and into said discharge channel; and operating means for immediately varying the pressure in said discharge channel to block discharge flow through the discharge channel and to alternatively permit said discharge flow through the discharge channel, to provide, at the discretion of the user, alternating suction to cause debris to be sucked into the catheter through said inlet opening, and other conditions to cause fluid from said pressure channel to pass outwardly through said inlet opening into tissues external to said distal catheter end. 16. The method of claim 15 in which said fluid in the pressure channel is x-ray contrast media. 17. The method of removing unwanted blood vessel debris from the body, which comprises: introducing a catheter into a blood vessel and advancing said catheter to bring a distally positioned side opening of said catheter adjacent to said debris; sequentially passing aqueous liquid through and out of said side opening into contact with said debris; and providing a reduced pressure through said side opening to draw said aqueous liquid and portions of said debris through said side opening into said catheter, said reduced pressure being provided by means of a jet of said aqueous liquid positioned within said catheter adjacent said opening; said jet directing a liquid stream across said opening; and conveying said drawn aqueous liquid and debris portions proximally through said catheter for removal from the body. 18. The method of claim 17 in which said jet of liquid is proximally directed substantially axially with said catheter.
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