US3692029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retention catheter and suprapubic shunt
Assignee: Medical Dynamics Inc
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Filing: 1971-05-03
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Granted: 1972-09-19
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Expires: 1991-05-03
Abstract
Abstract Retention catheter or suprapubic shunt of the expandable wing type characterized by a retainer comprising a sleeve affixed to a trochar tube, a second sleeve axially slidable on the tube, the wings extending between the sleeves, the slidable sleeve having spokes extending through longitudinal slots in the tube, the central portions of which may be engaged by a removable rod or stylet within the tube for collapsing the wings during insertion or removal of the catheter, the wings being expandable by a spring upon release or removal of the stylet. The insertable or distal end of the tube may be constructed to removably carry various tips or filiforms. The outer or proximate end is constructed to be removably connected by a suitable conduit fitting to a drain tube or cannula or to a source of fluid. The trochar tube, or portions thereof, may be relatively rigid or flexible, depending upon the requirements of the body entry passage configuration.
Inventors
- 👤 Edwin Lloyd Adair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:40
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/02; A61M25/04; A61M25/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
197 words
A catheter comprising; a. an elongated trochar tube having proximal and distal ends and being provided with a bore extending from its rear or proximate end to its front or distal end said distal end having angularly spaced, elongated slots therein communicating with said bore, b. a retainer device carried by the distal end comprising angularly spaced elongated flexible wings affixed at their rear ends to an outer portion of the trochar tube and extending substantially parallel to one another in a forward direction thereof, c. and annular member affixed to the forward ends of the wings and slidable on the distal end, d. said member having angularly spaced spokes extending through said elongated slots in the trochar tube and into the bore thereof, e. a stylet removably inserted in said bore from its proximate end and engageable with the central portion of said member, and f. a spring in said bore urging said member in a rearward direction toward said proximal end for expanding said wings outwardly away from the trochar tube, g. said stylet adapted to be moved inwardly to compress said spring and flatten said wings to a position lying adjacent the trochar tube.
Claim 2
Dependent Claim
197 words
A catheter comprising; a. an elongated trochar tube having proximal and distal ends and being provided with a bore extending from its rear or proximate end to its front or distal end said distal end having angularly spaced, elongated slots therein communicating with said bore, b. a retainer device carried by the distal end comprising angularly spaced elongated flexible wings affixed at their rear ends to an outer portion of the trochar tube and extending substantially parallel to one another in a forward direction thereof, c. and annular member affixed to the forward ends of the wings and slidable on the distal end, d. said member having angularly spaced spokes extending through said elongated slots in the trochar tube and into the bore thereof, e. a stylet removably inserted in said bore from its proximate end and engageable with the central portion of said member, and f. a spring in said bore urging said member in a rearward direction toward said proximal end for expanding said wings outwardly away from the trochar tube, g. said stylet adapted to be moved inwardly to compress said spring and flatten said wings to a position lying adjacent the trochar tube.
Claim 3
Dependent Claim
26 words
A catheter in accordance with claim 1 wherein said flexible wings are affixed at their ends to a sleeve and said member comprises a like sleeve.
Claim 4
Dependent Claim
34 words
A catheter in accordance with claim 1 wherein said wings are formed of a different material than said distal end of the trochar tube and which is of greater flexibility than the distal end.
Claim 5
Dependent Claim
32 words
A catheter in accordance with claim 1 wherein said spring is disposed within the trochar tube between said member and a head disposed at the extreme distal end of the trochar tube.
Claim 6
Dependent Claim
65 words
A catheter in accordance with claim 1 wherein the proximate end of the trochar is provided with a flange adapted to be engaged by an index and middle finger of an operator, and the proximate end of the stylet is adapted to be engaged by the thumb of the operator, whereby a squeezing action of the fingers, moves the stylet inwardly of the trochar tube.
Claim 7
Dependent Claim
45 words
A catheter in accordance with claim 1 wherein the proximate end of the trochar is provided with a circular tapered bore, and a conduit fitting having a mating male end adapted to seat in said bore when the stylet is removed from the trochar tube.
Claim 8
Dependent Claim
46 words
A catheter in accordance with claim 1 wherein said trochar tube is provided with a head disposed at its extreme distal end, and a plurality of tips of various configurations, each having the same means at one end thereof for interchangeably attaching same to said head.
Claim 9
Dependent Claim
33 words
A catheter in accordance with claim 7 wherein said head is provided with a central threaded aperture and said same means comprises a threaded stud adapted to be disposed in said threaded aperture.
Claim 10
Dependent Claim
33 words
A catheter in accordance with claim 7 wherein said head is provided with a central spherical socket and said same means comprises a spherical member adapted to be disposed in said spherical socket.
Claim 11
Dependent Claim
44 words
A catheter in accordance with claim 1 wherein at least a portion of the trochar tube adjacent its proximate end is flexible, said stylet being malleable and adapted to be bent to a desired configuration, said portion adapted to conform to the stylet configuration.
Claim 12
Dependent Claim
54 words
A catheter in accordance with claim 1 wherein said trochar tube is constructed of a plurality of aligned sections having joints which provide a uniform bore and outside diameter throughout their lengths, whereby the length of the trochar tube may be varied by selection of the lengths of one or more of the sections.
References Cited (Backward Citations)
US781763A
Cited
US1433031A
Cited
US1621159A
Cited
US1870942A
Cited
US2616429A
Cited
US3397699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |