Patent US2195781A successfully refreshed from Google Patents.
US5591132A
Expired / Lapsed
US
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Epidural catheter
Assignee: Becton Dickinson and Co
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Filing: 1995-12-22
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Granted: 1997-01-07
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Expires: 2015-12-22
Abstract
Abstract An epidural catheter with a patient end that forms a coil in its natural state, either in the plane of the length of the catheter or helically, so that, when inserted in the epidural space, the coil projects into the epidural space to ensure adequate retention but still ensuring that anaesthetic fluid emerges from side openings in the coil close to the point of insertion.
Inventors
- 👤 Len E. S. Carrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:55
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3401; A61M; A61M25/00; A61M25/0021; A61M25/0041
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
19 words
An epidural catheter comprising a tube with a patient end that forms into a coil in its natural state.
Claim 2
Dependent Claim
19 words
An epidural catheter comprising a tube with a patient end that forms into a coil in its natural state.
Claim 3
Dependent Claim
19 words
A catheter according to claim 1, wherein said coil lies in a plane including the length of the catheter.
Claim 4
Dependent Claim
25 words
A catheter according to claim 1, wherein said coil is formed by a region about 50 mm long at said patient end of the catheter.
Claim 5
Dependent Claim
16 words
A catheter according to claim 1, wherein said catheter has a diameter of about 10 mm.
Claim 6
Dependent Claim
11 words
A catheter according to claim 1, wherein said coil is helical.
Claim 7
Dependent Claim
32 words
A catheter according to claim 1, wherein said patient end of the catheter is closed and rounded, and wherein said catheter has at least one side opening close to said patient end.
Claim 8
Dependent Claim
32 words
A catheter according to claim 6, wherein said catheter has a plurality of openings close to its patient end, and wherein said openings are spaced along a region about 4 mm long.
Claim 9
Dependent Claim
18 words
A catheter according to any claim 1, wherein said catheter has an external diameter of about 1 mm.
Claim 10
Dependent Claim
57 words
An epidural catheter comprising an elongated tube with a patient end, wherein said patient end is closed and rounded, wherein said patient end forms into a coil in a plane including the length of the catheter in its natural state, and wherein the catheter has a plurality of side openings at said patient end along said coil.
Claim 11
Dependent Claim
57 words
An epidural catheter comprising an elongated tube with a patient end, wherein said patient end is closed and rounded, wherein said patient end forms into a coil in a plane including the length of the catheter in its natural state, and wherein the catheter has a plurality of side openings at said patient end along said coil.
Claim 12
Dependent Claim
48 words
An epidural catheter comprising a tube with a patient end, wherein said patient end is closed and rounded, wherein said patient end forms into a helical coil in its natural state, and wherein the catheter has a plurality of side openings at said patient end along said coil.
Claim 13
Dependent Claim
48 words
An epidural catheter comprising a tube with a patient end, wherein said patient end is closed and rounded, wherein said patient end forms into a helical coil in its natural state, and wherein the catheter has a plurality of side openings at said patient end along said coil.
Claim 14
Independent Claim
93 words
A method of performing epidural anaesthesia comprising the steps of: introducing a hollow needle having a tip so that said tip is located in the epidural space, providing a catheter of a kind having a patient end that forms into a coil in its natural state, straightening said patient end and inserting it into the needle until the patient end of the catheter emerges from the patient end of the needle and forms a coil within the epidural space, removing said needle, and introducing anesthetic fluid into the epidural space via the catheter.
Claim 15
Independent Claim
93 words
A method of performing epidural anaesthesia comprising the steps of: introducing a hollow needle having a tip so that said tip is located in the epidural space, providing a catheter of a kind having a patient end that forms into a coil in its natural state, straightening said patient end and inserting it into the needle until the patient end of the catheter emerges from the patient end of the needle and forms a coil within the epidural space, removing said needle, and introducing anesthetic fluid into the epidural space via the catheter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-07 | 2000-07-08 | 2001-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-07 | 2004-07-08 | 2005-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-07 | 2008-07-08 | 2009-01-07 | $7700.00 | Window Closed / Lapsed |