US3613661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanically controlling flow through living body ducts
Assignee: Individual
•
Filing: 1968-12-20
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Granted: 1971-10-19
•
Expires: 1988-12-20
Abstract
Abstract A living body duct may be mechanically blocked in a manner to enable unblocking of the duct when desired, by inserting into the duct a flow-blocking device, and more particularly a device having a valve maintaining the blocked condition of the duct as long as desired and which may be opened to resume normal flow through the duct.
Inventors
- 👤 Nayan S Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:16
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/20; A61F6/22; Y; Y10; Y10S; Y10S128/00; Y10S128/25
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
180 words
A method of mechanically blocking a duct in a living body in a manner to enable unblocking of the duct when desired, comprising: making an incision in the body and exposing a portion of the duct; opening said portion of the duct and permanently implanting in the duct a flow-blocking tubular device equipped with a valve which is operable from outside the body after implantation, and having a passage to assume the function of the affected part of the duct lumen, the passage being openable and closeable by operating the valve; closing the incision over and about said portion of the duct and the inserted device; and including selecting for said tubular device materials which will promote fibrosis and healing of the incision and the duct about the device to assure permanency of implantation and which will inhibit fibrosis in said passage and the openings thereof communicating with the duct lumen so that the passage will remain permanently capable of duct flow therethrough in the open condition of the passage even after an extended time of closure of said valve.
Claim 2
Independent Claim
180 words
A method of mechanically blocking a duct in a living body in a manner to enable unblocking of the duct when desired, comprising: making an incision in the body and exposing a portion of the duct; opening said portion of the duct and permanently implanting in the duct a flow-blocking tubular device equipped with a valve which is operable from outside the body after implantation, and having a passage to assume the function of the affected part of the duct lumen, the passage being openable and closeable by operating the valve; closing the incision over and about said portion of the duct and the inserted device; and including selecting for said tubular device materials which will promote fibrosis and healing of the incision and the duct about the device to assure permanency of implantation and which will inhibit fibrosis in said passage and the openings thereof communicating with the duct lumen so that the passage will remain permanently capable of duct flow therethrough in the open condition of the passage even after an extended time of closure of said valve.
Claim 3
Dependent Claim
26 words
A method according to claim 1 comprising severing the duct and inserting respective end portions of the tubular device into the severed ends of the duct.
Claim 4
Dependent Claim
24 words
A method according to claim 2 comprising expanding said end portions of the duct to receive and grip the end portions of the device.
Claim 5
Dependent Claim
75 words
A method according to claim 2 in which the device Comprises a tube of plastic material compatible with body tissue and coaxial extension elements carried by and projecting from the respective opposite end portions of the plastic tube and formed from fibrosis-inhibiting material, and effecting insertion of the device into the end portions of the duct to an extent which receives said extension elements fully with the severed ends of the duct encompassing the tube.
Claim 6
Dependent Claim
28 words
A method according to claim 1 comprising subsequent to closing and healing of the incision operating the valve of the device by manipulation through the overlying body tissues.
Claim 7
Dependent Claim
54 words
A method according to claim 1 comprising closing said valve of the device before closing of the incision, and subsequent to closing and healing of the incision operating the valve of the device by manipulation through the overlying body tissue to effect resumed flow through the passage and through the lumen of the duct.
Claim 8
Dependent Claim
41 words
A method according to claim 1 comprising implanting the device in the duct with the valve open and leaving the valve open until the closed incision has completely healed and thereafter closing the valve by manipulation through the surrounding body tissue.
Claim 9
Independent Claim
147 words
A device for mechanically blocking a duct in a living body in a manner to enable unblocking of the duct when desired, comprising a unilinear resilient tubular section adapted to be permanently implanted in a living body duct and having a passage to assume the function of the affected part of the duct lumen; valve means carried by said section operable for selectively closing said passage; and opposite end portions of said section being constructed of a material which will inhibit fibrosis in said passage and at the openings to said passage from a duct in which the device is implanted so that the passage and portions of the duct contiguous to the ends of the structure will remain permanently capable of duct flow therethrough in the open condition of the passage even after an extended time of closure of the passage by said valve after implantation.
Claim 10
Independent Claim
147 words
A device for mechanically blocking a duct in a living body in a manner to enable unblocking of the duct when desired, comprising a unilinear resilient tubular section adapted to be permanently implanted in a living body duct and having a passage to assume the function of the affected part of the duct lumen; valve means carried by said section operable for selectively closing said passage; and opposite end portions of said section being constructed of a material which will inhibit fibrosis in said passage and at the openings to said passage from a duct in which the device is implanted so that the passage and portions of the duct contiguous to the ends of the structure will remain permanently capable of duct flow therethrough in the open condition of the passage even after an extended time of closure of the passage by said valve after implantation.
Claim 11
Dependent Claim
30 words
A device according to claim 8 in which said section comprises a material which is compatible with body tissue in a substantial length of the section intermediate said end portions.
Claim 12
Dependent Claim
35 words
A device according to claim 8 in which said section is intermediate said end portions and is of plastic material supporting said valve, and said end portions comprise metal extensions secured to said intermediate section.
Claim 13
Dependent Claim
39 words
A device according to claim 10 in which said metal extensions and said intermediate section have respective end portions telescopically interengaged, and the passage is of substantially uniform diameter throughout its length in said end portions and said section.
Claim 14
Dependent Claim
123 words
A device according to claim 8 in which said section comprises a resiliently flexible continuous intermediate plastic tube, and said valve comprises a malleable metal piece wrapped about said tube normally in the form of a generally cylindrical band conforming to the shape of the tube perimeter and being adapted to be squeezed into generally oval transverse cross section to collapse the tube and tightly squeeze the passage closed into flow-blocking condition, said valve being adapted to be squeezed open by pressure across the length of the oval cross section to force it open from its clamping relation to said tube into generally cylindrical original shape so that the passage will reopen by springing apart of the wall provided by said resilient tube.
Claim 15
Dependent Claim
40 words
A device according to claim 12 in which said valve piece comprises a metal strip of substantial width having overlapping terminals serving as a safety interlock to prevent accidental spreading of the valve and thus unintended opening of the passage.
Claim 16
Dependent Claim
37 words
A device according to claim 12 wherein said metal piece comprises a wire strip which is long enough to be wrapped several times around the tube and with the wraps in closely abutting relation to one another.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |