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US 7,682,337 B2Granted
Method and apparatus for gaining percutaneous access to a body
AssigneeCook Incorporated
InventorArman H. Valaie
Life of this patent
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Abstract
The present invention is directed to apparatus and methods for gaining percutaneous access to body anatomy, for example an organ or a body lumen. According to one aspect of the invention, an apparatus is provided comprising a needle and an outer sheath. The needle is receivable within the outer sheath and comprises a plurality of outer diameters. A distal portion of the needle has a lesser diameter than a proximal portion of the needle. Other embodiments are also disclosed.
Claims21
An apparatus for gaining percutaneous access to a body lumen, comprising:
- a needle, said needle having a distal tip suitable for initial percutaneous puncture into said body lumen, said needle defining an outer surface having a first outer diameter along a distal first length, a second outer diameter along a proximal second length, and a first taper contiguous with said first outer diameter and said second outer diameter intermediate said first length and said second length, said second outer diameter being greater than said first outer diameter;
- and an outer sleeve terminating at a distal end having a third outer diameter and comprising an outer sleeve lumen extending longitudinally therethrough, a second taper from said third outer diameter at said distal end to a fourth outer diameter greater than said third outer diameter and proximal thereto, and a shaft portion having said fourth outer diameter along a shaft length contiguous with said second taper, said needle being receivable within said outer sleeve lumen with said second taper disposed proximal of said first taper.
A method for gaining percutaneous access to body anatomy, comprising:
- providing an apparatus for insertion into body anatomy, said apparatus comprising:
- a needle having a distal tip suitable for initial percutaneous puncture into said body anatomy, said needle having a first outer diameter along a distal first length and a tip at a distal end of said first length suitable for said insertion, a second outer diameter along a proximal second length, and a first taper contiguous with said first outer diameter and said second outer diameter intermediate said first length and said second length, said second outer diameter being greater than said first outer diameter;
- and an outer sleeve terminating at a distal end having a third outer diameter and comprising an outer sleeve lumen extending longitudinally therethrough, a second taper from said third outer diameter at said distal end to a fourth outer diameter greater than said third outer diameter and proximal thereto, and a shaft portion having said fourth outer diameter along a shaft length contiguous with said second taper, said needle being receivable within said outer sleeve lumen with said second taper disposed proximal of said first taper;
- and inserting said apparatus into said body anatomy.
1 more element
Dependencies are inferred from the claim text.