Claims
- 1. A vascular catheter comprising
- a catheter body which is made up of an inner tube formed of a metal selected from the group consisting of steel, tungsten and copper or a alloy selected from the group of steel alloy, tungsten alloy and copper alloy and an outer tube formed of a synthetic resin covering an outside surface of the inner tube, the inner tube having a distal end and the catheter body having a lumen,
- said catheter body having a main portion and a tip portion, the main portion of the catheter body being made up of the inner and outer tubes, a tip of the catheter body being made up of a portion of said outer tube extending from the distal end of the inner tube,
- and the inner tube having a distal end portion provided with at least one spiral slit.
- 2. A vascular catheter according to claim 1, wherein said spiral slit extends from at least adjacent a distal end of said inner tube to a point along the length of the inner tube.
- 3. A vascular catheter according to claim 1, wherein said spiral slit is gradually reduced in pitch toward the distal end of said inner tube.
- 4. A vascular catheter according to claim 1, wherein said spiral slit is gradually increased in width toward the distal end of said inner tube.
- 5. A vascular catheter according to claim 1, wherein a tip portion and a main portion of said outer tube are formed of a synthetic resin, the synthetic resin of the tip portion being softer than the synthetic resin of the main portion.
- 6. A vascular catheter according to claim 1 wherein said synthetic resin is a synthetic resin elastomer.
- 7. A vascular catheter according to claim 1 wherein said catheter is a brain blood vessel catheter.
- 8. A vascular catheter of claim 1 wherein said slit forms a space in said inner tube.
- 9. A vascular catheter according to claim 5 wherein said synthetic resin is a synthetic resin elastomer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-137273 |
Jun 1994 |
JPX |
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Parent Case Info
This application is a divisional of application Ser. No. 08/492,396, filed Jun. 19, 1995 now U.S. Pat. No. 5,569,200.
US Referenced Citations (6)
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Divisions (1)
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Number |
Date |
Country |
Parent |
492396 |
Jun 1995 |
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