US5848996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple hole spinal needle
Assignee: Individual
•
Filing: 1997-05-19
•
Granted: 1998-12-15
•
Expires: 2017-05-19
Abstract
Abstract A double-hole pencil-point (DHPP) spinal needle is composed of a closed end blunt ogival or pencil point tip and two circular coaxial holes in close proximity to the tip. Anesthetic solution may be injected through the coaxial holes in a direction parallel to the long axis of the spinal fluid column which allows an even anesthetic distribution with a low dosage required. The spinal needle of the present invention allows anesthetic solution to be injected even when one of the holes is obstructed by a tissue fragment and rapid reflux of cerebral spinal fluid at twice the rate of single hole pencil point spinal needles.
Inventors
- 👤 Joseph Eldor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:55
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3401
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
90 words
A needle for penetrating a spinal fluid column and dispensing anesthesia consisting of: a substantially conical or ogival pencil point tip including a perforating end; a hollow substantially cylindrical shaft, and a pair of coaxially positioned apertures disposed at a junction of said shaft and tip, and said tip and shaft being coupled through said apertures, said needle further comprising a length sufficient to linearly penetrate dura matter and enter a subarachnoid space, so that said tip and said two coaxially disposed apertures are concurrently positionable within the subarachnoid space.
Claim 2
Dependent Claim
90 words
A needle for penetrating a spinal fluid column and dispensing anesthesia consisting of: a substantially conical or ogival pencil point tip including a perforating end; a hollow substantially cylindrical shaft, and a pair of coaxially positioned apertures disposed at a junction of said shaft and tip, and said tip and shaft being coupled through said apertures, said needle further comprising a length sufficient to linearly penetrate dura matter and enter a subarachnoid space, so that said tip and said two coaxially disposed apertures are concurrently positionable within the subarachnoid space.
Claim 3
Dependent Claim
56 words
A needle for penetrating a spinal fluid column and dispensing anesthesia consisting of substantially conical or ogival tip including a perforating end; and a hollow substantially cylindrical shaft, said shaft including a pair of coaxially positioned apertures, disposed at a junction of said shaft and tip and said tip and shaft being coupled through said apertures.
Claim 4
Dependent Claim
56 words
A needle for penetrating a spinal fluid column and dispensing anesthesia consisting of substantially conical or ogival tip including a perforating end; and a hollow substantially cylindrical shaft, said shaft including a pair of coaxially positioned apertures, disposed at a junction of said shaft and tip and said tip and shaft being coupled through said apertures.
Claim 5
Dependent Claim
39 words
The needle according to claim 2, said needle comprising a length sufficient to linearly penetrate dura matter and enter a subarachnoid space, so that said tip and said two coaxially disposed apertures are concurrently positionable within the subarachnoid space.
Claim 6
Dependent Claim
19 words
The needle according to claim 3, wherein a diameter of said apertures is between approximately 0.008 and 0.0135 inches.
Claim 7
Dependent Claim
33 words
The needle according to claim 3, wherein said apertures are positioned such that a distance between said perforating end and a leading edge of said apertures is between approximately 0.025 and 0.055 inches.
Claim 8
Dependent Claim
20 words
The needle according to claim 2, wherein an outside diameter of said needle is between approximately 0.0180 and 0.0185 inches.
Claim 9
Dependent Claim
20 words
The needle according to claim 5, wherein an inside diameter of said needle is between approximately 0.0115 and 0.0130 inches.
Claim 10
Dependent Claim
14 words
The needle according to claim 2, wherein said apertures are substantially the same diameter.
Claim 11
Dependent Claim
25 words
The needle according to claim 2, said needle further comprising an obturator for covering and blocking said apertures during insertion of said needle into tissue.
Claim 12
Dependent Claim
22 words
The needle according to claim 2, further comprising an anesthetic solution for injecting through said needle to flow outwardly through said apertures.
Claim 13
Dependent Claim
17 words
The needle according to claim 3, further comprising an anesthetic solution for injecting into the subarachnoid space.
Claim 14
Dependent Claim
13 words
The needle according to claim 11, said anesthetic solution injected through said apertures.
Claim 15
Dependent Claim
14 words
The needle according to claim 12, wherein said apertures are substantially equal in diameter.
Claim 16
Dependent Claim
14 words
The needle according to claim 3, wherein said apertures are substantially equal in diameter.
Claim 17
Dependent Claim
56 words
A needle for penetrating a spinal fluid column and dispensing anesthesia consisting of: a substantially conical or ogival pencil point tip including a perforating end; a hollow substantially cylindrical shaft, and a pair of coaxially positioned apertures disposed at a junction of said shaft and tip, and said tip and shaft being coupled through said apertures.
Claim 18
Dependent Claim
56 words
A needle for penetrating a spinal fluid column and dispensing anesthesia consisting of: a substantially conical or ogival pencil point tip including a perforating end; a hollow substantially cylindrical shaft, and a pair of coaxially positioned apertures disposed at a junction of said shaft and tip, and said tip and shaft being coupled through said apertures.
Claim 19
Dependent Claim
19 words
The needle according to claim 15, wherein a diameter of said apertures is between approximately 0.008 and 0.0135 inches.
Claim 20
Dependent Claim
33 words
The needle according to claim 15, wherein said apertures are positioned such that a distance between said perforating end and a leading edge of said apertures is between approximately 0.025 and 0.055 inches.
Claim 21
Dependent Claim
20 words
The needle according to claim 15, wherein an outside diameter of said needle is between approximately 0.0180 and 0.0185 inches.
Claim 22
Dependent Claim
20 words
The needle according to claim 15, wherein an inside diameter of said needle is between approximately 0.0115 and 0.0130 inches.
Claim 23
Dependent Claim
70 words
A needle for penetrating a spinal fluid column and dispensing anesthesia consisting of: a substantially conical or ogival pencil point tip including a perforating point generally expanding out to a distal end; a hollow substantially cylindrical shaft portion; and a pair of coaxially positioned apertures disposed at a junction of said shaft and tip, extending through said shaft portion directly adjacent to said distal end of said pencil point tip.
Claim 24
Dependent Claim
70 words
A needle for penetrating a spinal fluid column and dispensing anesthesia consisting of: a substantially conical or ogival pencil point tip including a perforating point generally expanding out to a distal end; a hollow substantially cylindrical shaft portion; and a pair of coaxially positioned apertures disposed at a junction of said shaft and tip, extending through said shaft portion directly adjacent to said distal end of said pencil point tip.
Claim 25
Dependent Claim
13 words
The needle according to claim 20, wherein said pencil point tip is conical.
Claim 26
Dependent Claim
13 words
The needle according to claim 20, wherein said pencil point tip is ogival.
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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) | 2001-12-14 | 2002-06-15 | 2002-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-12-14 | 2006-06-15 | 2006-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-12-14 | 2010-06-15 | 2010-12-15 | $7700.00 | Window Closed / Lapsed |