Patent US5800407A successfully refreshed from Google Patents.
US5800407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple hole epidural catheter
Assignee: Individual
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Filing: 1995-12-21
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Granted: 1998-09-01
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Expires: 2015-12-21
Abstract
Abstract An epidural catheter which combines the benefits of the open-end and closed-end three lateral holes type catheters. The epidural catheter of the present invention is designed to include an end hole and a plurality of lateral holes epidural catheter. The combined end and multiple lateral holed epidural catheter of the present invention includes seven holes within a 1.5 cm head. The holes are positioned along the head such that one hole is provided at the tip, three lateral holes are circumferentially arranged about the head at approximately 1 mm from each other, and three additional holes are axially displaced from one another by approximately 4 mm. All the holes are within the 1.5 cm from the tip. The radius of each of the lateral holes is the same, thus, the anesthetic solution stream is the same from each hole.
Inventors
- 👤 Joseph Eldor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:26
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/007; A61M2025/0007
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
55 words
A device for continuous epidural analgesia comprising: an epidural catheter having a single passageway with an end hole and a plurality of side holes, wherein said end hole is smaller in diameter than said side holes for providing flow of epidural analgesic through the passage way and out through said end hole and side holes.
Claim 2
Independent Claim
55 words
A device for continuous epidural analgesia comprising: an epidural catheter having a single passageway with an end hole and a plurality of side holes, wherein said end hole is smaller in diameter than said side holes for providing flow of epidural analgesic through the passage way and out through said end hole and side holes.
Claim 3
Dependent Claim
19 words
The device as claimed in claim 1, wherein said plurality of side holes are formed of a same radius.
Claim 4
Dependent Claim
20 words
The device as claimed in claim 1, wherein said plurality of side holes are circumferentially arranged around said epidural catheter.
Claim 5
Dependent Claim
39 words
The device as claimed in claim 1, wherein said plurality of side holes includes three lateral holes axially arranged 1 mm apart, and a first of said three lateral holes being axially positioned 1 mm from said end hole.
Claim 6
Dependent Claim
38 words
The device as claimed in claim 1, wherein said plurality of side holes includes three lateral holes axially arranged 4 mm apart, and a first of said three lateral holes being positioned 7 mm from said end hole.
Claim 7
Dependent Claim
108 words
An epidural catheter comprising: a tubular member with a single passageway through its interior and having a distal tip; a first portion of said tubular member including a first plurality of holes; a second portion of said tubular member including a second plurality of holes; and one of said first plurality of holes positioned at a tip of said first portion, said one of said first plurality of holes being smaller in diameter than the remainder of said first plurality of holes and said second plurality of holes for providing flow of epidural analgesic through the single passageway and out through said first and second plurality of holes.
Claim 8
Dependent Claim
108 words
An epidural catheter comprising: a tubular member with a single passageway through its interior and having a distal tip; a first portion of said tubular member including a first plurality of holes; a second portion of said tubular member including a second plurality of holes; and one of said first plurality of holes positioned at a tip of said first portion, said one of said first plurality of holes being smaller in diameter than the remainder of said first plurality of holes and said second plurality of holes for providing flow of epidural analgesic through the single passageway and out through said first and second plurality of holes.
Claim 9
Dependent Claim
23 words
The epidural catheter according to claim 6, a remainder of said first plurality of holes spaced circumferentially and axially along said first portion.
Claim 10
Dependent Claim
20 words
The epidural catheter according to claim 7, said second plurality of holes spaced circumferentially and axially along said second portion.
Claim 11
Dependent Claim
63 words
The epidural catheter according to claim 8, a remainder of said first plurality of holes are equidistantly spaced circumferentially around a periphery of said catheter and equidistantly spaced axially along a length of said first portion; and said second plurality of holes are equidistantly spaced circumferentially around said periphery of said catheter and equidistantly spaced axially along a length of said second portion.
Claim 12
Dependent Claim
28 words
The epidural catheter according to claim 9, said length of said first portion being 3 mm long and said length of said second portion being 1.2 cm long.
Claim 13
Dependent Claim
23 words
The epidural catheter according to claim 9, wherein a first of said second plurality of holes is positioned 7 mm from said tip.
Claim 14
Dependent Claim
34 words
The epidural catheter according to claim 6, said one of said first plurality of holes being smaller in diameter than said remainer of said first plurality of holes and said second plurality of holes.
Claim 15
Dependent Claim
26 words
The epidural catheter according to claim 6, said remainder of said first plurality of holes and said second plurality of holes being of substantially equal diameter.
Claim 16
Dependent Claim
13 words
The epidural catheter according to claim 13, said diameter being approximately 0.014 inches.
Claim 17
Dependent Claim
23 words
The epidural catheter according to claim 6, wherein a diameter of said one of said first plurality of holes being approximately 0.010 inches.
Claim 18
Dependent Claim
26 words
The epidural catheter according to claim 6, wherein said catheter includes a outside diameter of approximately 0.034 inches and a wall thickness of approximately 0.010 inches.
Claim 19
Dependent Claim
18 words
The epidural catheter according to claim 6, said catheter further comprising indicia for determining a depth of penetration.
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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) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |