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US4013080A Expired / Lapsed US ⏱️ 0.0 years remaining

Cannula connector and direction indicator means for injection system

Assignee: Individual
•
Filing: 1975-06-05
•
Granted: 1977-03-22
•
Expires: 1995-06-05
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Abstract

Abstract A cannula has a hub formed at its proximal end with a terminal peripheral flange and also has a radial vane having an apertured proximal extension. A stylet fits into the cannula and has a hub with a skirt to receive the cannula hub flange and also having a hook received in the vane extension aperture to lock the two hubs together and insure protrusion of the stylet point from the distal end of the cannula. A barb on the hook latches the hubs together but is also used to disengage the hubs. An obturator has a hub and hook similar to the stylet. A disc-puncturing needle has a hub with an imperforate vane which is oriented with a bevel at the distal end of the needle and also provides leverage to connect the needle hub tightly to a Leur-lok or other fitting of a syringe. A tool comprises two leaves which can be pinched together to bend the distal of the needle to desired shape, the leaves being formed with complex curves so that a choice of bends is available. The apparatus is preferably used for injection into the nucleus pulposus of a lumbar disc of contrast fluids, probes and drugs.

Inventors

  • 👤 Edward C. Froning

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 16:39
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0612; A61B; A61B17/00; A61B17/34; A61B17/3401; A61B90/00; A61B90/10; A61B90/11; A61M25/0606; A61M39/00; A61M39/10; A61B2017/00526; A61B2017/347; A61B90/39; A61M39/1033

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 47 words
A cannula comprising a lumen having a central longitudinal bore, a hub on the proximal end of said lumen, a vane extending outward of said bore parallel to said bore formed with an aperture having an axis transverse to said bore, said axis not intersecting said bore.
Claim 2
Dependent Claim 47 words
A cannula comprising a lumen having a central longitudinal bore, a hub on the proximal end of said lumen, a vane extending outward of said bore parallel to said bore formed with an aperture having an axis transverse to said bore, said axis not intersecting said bore.
Claim 3
Dependent Claim 86 words
In combination, a cannula according to claim 1 and an instrument having a shaft fitting inside said lumen, and of a length to protrude slightly beyond the end of said cannula, a second hub on said instrument, said second hub shaped to receive said first mentioned hub of said cannula, a hook projecting from said second hub, said hook shaped to fit into said aperture to lock said hubs together in a fixed, predetermined position so that said shaft projects from the end of said cannula.
Claim 4
Dependent Claim 21 words
The combination of claim 2 in which said hook is resilient and formed with a barb to latch on said vane.
Claim 5
Dependent Claim 16 words
The combination of claim 2 in which said instrument is a stylet having a sharp point.
Claim 6
Dependent Claim 12 words
The combination of claim 2 in which said instrument is an obturator.
Claim 7
Dependent Claim 79 words
In combination, a cannula according to claim 1 and a disc puncturing needle shaped to fit inside said lumen and to project beyond the end thereof, and a second hub on said needle shaped to engage said first-mentioned hub of said cannula, locking-means on the upper end of said second hub adapted to engage cooperating locking means on the barrel of a conventional syringe of the type formed with said last-named locking means adapted to engage a conventional needle.
Claim 8
Dependent Claim 26 words
The combination of claim 6 in which said needle is formed with a bevel and said second hub has a second vane aligned with said bevel.
Claim 9
Dependent Claim 26 words
The combination of claim 7 in which said needle projects beyond the distal end of said cannula, said needle curved in alignment with said second vane.
Claim 10
Dependent Claim 54 words
A puncturing needle comprising an elongated lumen formed with a bevel at its distal end, a hub on the proximal end of said lumen, said hub having means on its upper end for attachment to a syringe, and a thin vane extending radially from said hub oriented in the same direction as said bevel.
Claim 11
Dependent Claim 54 words
A puncturing needle comprising an elongated lumen formed with a bevel at its distal end, a hub on the proximal end of said lumen, said hub having means on its upper end for attachment to a syringe, and a thin vane extending radially from said hub oriented in the same direction as said bevel.
Claim 12
Dependent Claim 25 words
A needle according to claim 9 in which the distal end of said lumen is formed with a curve in the direction opposite said vane.

References Cited (Backward Citations)

US1248492A Cited
US2794435A Cited
US3608539A Cited
US3628524A Cited
US3630192A Cited
US3789852A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-03-21 1980-09-20 1981-03-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-03-21 1984-09-20 1985-03-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-03-21 1988-09-20 1989-03-22 $7700.00 Window Closed / Lapsed

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