Patent US5095910A successfully refreshed from Google Patents.
US3780733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter
Assignee: Individual
•
Filing: 1972-07-24
•
Granted: 1973-12-25
•
Expires: 1992-07-24
Abstract
Abstract For use in administering continual spinal anesthesia, a catheter for longitudinal movement within the lumen of a relatively large needle used to approach just about to the spinal column to the end of the catheter, a thin needle with a through opening is secured and a stylet is provided in the catheter to advance the small needle relative to the large needle to pierce the wall of the spinal column in a relatively fine opening through which the anesthesia is administered.
Inventors
- 👤 Manzor M Martinez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/0069
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
249 words
A spinal anethesia administering apparatus comprising in combination, a first big needle defining a lumen and a catheter sized for longitudinal movement removable received in the lumen of said big needle, said catheter including, a tubular length having a first end zone and a second end zone and of a diameter smaller than the lumen of the big needle, a thin needle portion on the first end zone of said tubular length having a through passageway and a distal end portion having a tissue wall piercing tip and a proximal end portion and with said through passageway being in fluid transmitting engagement with said tubular length, an elongated stylet having a first end and a second end and with said first end in said tubular length and with said second end being exterior of said tubular length, and said stylet being of a length greater than said tubular length and being sized for longitudinal coaxial movement in the tubular length and being sized less than said through opening in said thin needle portion, and mutually inter-co-operating means on the first end of the stylet and said thin needle for applying a longitudinal force to advance the thin needle and tubular length relative to the big needle after said big needle has been utilized to penetrate to a predetermined depth for a second stage of penetration by said thin needle, whereupon the stylet may be removed from said combination and material be injected through said tubular length and thin needle.
Claim 2
Dependent Claim
249 words
A spinal anethesia administering apparatus comprising in combination, a first big needle defining a lumen and a catheter sized for longitudinal movement removable received in the lumen of said big needle, said catheter including, a tubular length having a first end zone and a second end zone and of a diameter smaller than the lumen of the big needle, a thin needle portion on the first end zone of said tubular length having a through passageway and a distal end portion having a tissue wall piercing tip and a proximal end portion and with said through passageway being in fluid transmitting engagement with said tubular length, an elongated stylet having a first end and a second end and with said first end in said tubular length and with said second end being exterior of said tubular length, and said stylet being of a length greater than said tubular length and being sized for longitudinal coaxial movement in the tubular length and being sized less than said through opening in said thin needle portion, and mutually inter-co-operating means on the first end of the stylet and said thin needle for applying a longitudinal force to advance the thin needle and tubular length relative to the big needle after said big needle has been utilized to penetrate to a predetermined depth for a second stage of penetration by said thin needle, whereupon the stylet may be removed from said combination and material be injected through said tubular length and thin needle.
Claim 3
Dependent Claim
105 words
The combination as set forth in claim 1 wherein the interco-operating means on the first end of the stylet and said thin needle comprise walls included in said thin needle converging to a constricted opening at the distal end, said opening being of a diameter greater than the diameter of the first end of said stylet and the diameter of said stylet being less than the span between the walls of said thin needle at its proximal end to bear against the wall of the needle for advancing movement of the catheter relative to the big needle when longitudinal force is applied to the stylet.
Claim 4
Dependent Claim
37 words
The catheter as set forth in claim 1 wherein the catheter is of about 20 gauge size, the thin needle is of about 25 gauge size and the longitudinal dimension of the small needle is about 0.5cm.
Claim 5
Dependent Claim
101 words
The catheter as set forth in claim 1 wherein means are provided securing the proximal end of the thin needle to the first end zone of the tubular length and said means comprise an annular recess in the first end zone of said tubular length and said end zone is of plastic material and a pattern in relief on the proximal end of the needle is provided and said pattern is disposed within said recess and imbedded in the plastic material of said tubular length, with said pattern in relief keying the needle and tubular length together as a unitary piece.
Claim 6
Dependent Claim
99 words
The combination as set forth in claim 4 wherein the intercooperating means on the inner end of the stylet and catheter comprises walls included in said thin needle converging to a constricted opening at the distal end of a diameter greater than the diameter of the first end of said stylet and the diameter of said stylet is less than the span between the wall of said thin needle at its proximal end to nest between the walls and thin needle ends and to bear against the needle for advancing movement when longitudinal force is applied to the stylet.
References Cited (Backward Citations)
US2512569A
Cited
US2828744A
Cited
US3181336A
Cited
US3380448A
Cited
US3358684A
Cited
US3506007A
Cited
US3584624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |