US3690323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for draining ventricular fluid in cases of hydrocephalus
Assignee: United States Department of the Army
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Filing: 1970-12-01
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Granted: 1972-09-12
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Expires: 1990-12-01
Abstract
Abstract A modified ventricular end for a ventriculo-cardiac shunt used in the treatment of hydrocephalus and similar conditions is provided for removing fluids which accumulate in the cavity of the brain and must be drained to the heart. An umbrella-shaped cover protects an apertured end of the shunt for preventing the same from becoming attachad to the ventricular walls by growth of brain tissue thereon. The device, which is inserted into the brain in a closed position and is subsequently opened, has supporting rib structures which may carry various sensing elements for observing conditions in the brain.
Inventors
- 👤 Donald E Wortman
- 👤 Lawrence J Mervis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:04
CPC Classifications
A; A61; A61M; A61M27/00; A61M27/002; A61M27/006; A61M1/00; A61M1/84
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
111 words
A device suitable for placement in a body cavity for draining fluids therefrom, comprising: a drainage tube having a closed distal end provided with lateral passageways adjacent thereto, the tube being of sufficient length so that its proximal end is adapted to extend beyond a body cavity into the atmosphere; porous means covering said distal end of said tube and said lateral passageways therein, said porous means including expansible means for providing an umbrella-like liner thereabout for permitting passage therethrough of fluid but preventing obstruction of said lateral passageways; and, means for normally retaining said porous means in an unexpanded state during insertion of said drainage tube into a body cavity.
Claim 2
Independent Claim
111 words
A device suitable for placement in a body cavity for draining fluids therefrom, comprising: a drainage tube having a closed distal end provided with lateral passageways adjacent thereto, the tube being of sufficient length so that its proximal end is adapted to extend beyond a body cavity into the atmosphere; porous means covering said distal end of said tube and said lateral passageways therein, said porous means including expansible means for providing an umbrella-like liner thereabout for permitting passage therethrough of fluid but preventing obstruction of said lateral passageways; and, means for normally retaining said porous means in an unexpanded state during insertion of said drainage tube into a body cavity.
Claim 3
Dependent Claim
25 words
The device set forth in claim 1, further comprising means supported on said porous means for sensing predetermined conditions when inserted into a body cavity.
Claim 4
Dependent Claim
100 words
The device set forth in claim 2, wherein said porous means comprises a plurality of elongate, resilient rib constructions normally disposed on said tube parallel to the longitudinal axis thereof and to each other when in said unexpanded state, with one end of each of said ribs being secured to the outer wall of said tube, said ribs being preconditioned to assume a funnel-shaped configuration when the unsecured ends thereof are released by said retaining means; and, a porous material covering the same and attached thereto at spaced intervals for permitting said ribs to expand into said substantially funnel-shaped configuration.
Claim 5
Dependent Claim
75 words
The device set forth in claim 3, wherein said retaining means comprises a sleeve member slidably disposed over said drainage tube and said porous covering means, said sleeve member having a stop therein for engaging said ribs upon being fully extended thereover, and, said sleeve member, upon withdrawal thereof at a predetermined distance substantially equal to the length of said unsecured portion of said ribs, permitting said porous covering means to assume said funnel-shaped configuration.
Claim 6
Dependent Claim
45 words
The device set forth in claim 4, wherein said sensing means comprises sensing devices disposed in cavities formed in said ribs, and further including channels formed in said ribs and said sleeve member communicating with said cavities for receiving connecting leads to said sensing devices.
Claim 7
Dependent Claim
15 words
The device set forth in claim 5, wherein said sensing devices are responsive to pressure.
Claim 8
Dependent Claim
15 words
The device set forth in claim 5 wherein said sensing devices are responsive to temperature.
Claim 9
Dependent Claim
113 words
In an apparatus for draining cerebrospinal fluid into the circulatory system, the combination of a resilient conduit adapted to be connected to said circulatory system; catheter means for connecting the proximate end of said conduit to a source of cerebrospinal fluid; porous means covering the end of said catheter means and including expansible means for providing an umbrella-like liner thereabout for permitting passage therethrough of said cerebrospinal fluid but preventing the obstruction of said catheter means; means for normally retaining said porous means in an unexpanded state during insertion into said source of cerebrospinal fluid; and, means supported on said expandible porous means for sensing predetermined conditions within said source of cerebrospinal fluid.
Claim 10
Dependent Claim
113 words
In an apparatus for draining cerebrospinal fluid into the circulatory system, the combination of a resilient conduit adapted to be connected to said circulatory system; catheter means for connecting the proximate end of said conduit to a source of cerebrospinal fluid; porous means covering the end of said catheter means and including expansible means for providing an umbrella-like liner thereabout for permitting passage therethrough of said cerebrospinal fluid but preventing the obstruction of said catheter means; means for normally retaining said porous means in an unexpanded state during insertion into said source of cerebrospinal fluid; and, means supported on said expandible porous means for sensing predetermined conditions within said source of cerebrospinal fluid.
Claim 11
Dependent Claim
142 words
The combination set forth in claim 8, wherein said catheter means is substantially tubular having a closed distal end provided with a plurality of lateral passageways adjacent to said distal end; and, said porous means comprises a plurality of elongate rib constructions normally disposed on said catheter tube parallel to the longitudinal axis thereof and to each other when in said unexpanded state, with one end of each of said ribs being secured to the outer wall of said catheter tube on the side of said passageways opposite said distal end, said ribs being preconditioned to assume a conical configuration when the unsecured ends thereof are released by said retaining means; and, a porous material covering said rib constructions and attached thereto at spaced intervals for permitting the same to expand to said conical configuration while providing a tight porous cover thereabout.
Claim 12
Dependent Claim
104 words
The combination set forth in claim 9, wherein said means for normally retaining said porous means in an unexpanded state comprises a substantially tubular-shaped sleeve member having a stop therein for engaging said ribs upon being fully extended thereover, said sleeve member, upon withdrawal thereof a predetermined distance substantially equal to the length of said unsecured portion of said ribs, permitting the expansion of said porous covering means, and, said sensing means comprises sensing devices disposed in cavities formed in said ribs, and channels formed in said ribs and said sleeve member communicating with said cavities for receiving connecting leads for said sensing devices.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |