Patent US3916875A successfully refreshed from Google Patents.
US3916875A
Expired / Lapsed
US
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Lymph duct cannulation facilitator
Assignee: Individual
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Filing: 1974-01-02
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Granted: 1975-11-04
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Expires: 1994-01-02
Abstract
Abstract A device is provided to facilitate lymph duct cannulation. An enclosed chamber having a pair of pliable membranes surrounds a portion of the duct. The chamber pressure is reduced to aid dilation of the duct as excess lymph is massaged into the enclosed duct region. The cannulation needle is guided into the dilated duct via an end opening in the chamber.
Inventors
- 👤 Herbert Toch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:48
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/007; A61M5/42; A61M5/425
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
161 words
A device for facilitating cannulation of a lymph duct of a living being, comprising; a rigid exterior shell configured to surround an elongate portion of said lymph duct, said shell being closed at each end except for orifices adapt to accommodate said duct, said shell consisting of two complementary shell members adapted to be clamped about said lymph duct to form a chamber within said shell and to contain said lymph duct portion, a pair of pliable membranes within said shell, each pliable membrane being peripherally attached to a respective one of said shell members so as to define a respective confined space between said pliable membrane and said respective shell member, and means for providing reduced pressure within each of said confined spaces so that said pliable membranes will be drawn toward said respective shell members, thereby reducing the pressure between said pliable membranes exterior to said duct to aid dilation thereof as excess lymph is massaged into said duct.
Claim 2
Independent Claim
161 words
A device for facilitating cannulation of a lymph duct of a living being, comprising; a rigid exterior shell configured to surround an elongate portion of said lymph duct, said shell being closed at each end except for orifices adapt to accommodate said duct, said shell consisting of two complementary shell members adapted to be clamped about said lymph duct to form a chamber within said shell and to contain said lymph duct portion, a pair of pliable membranes within said shell, each pliable membrane being peripherally attached to a respective one of said shell members so as to define a respective confined space between said pliable membrane and said respective shell member, and means for providing reduced pressure within each of said confined spaces so that said pliable membranes will be drawn toward said respective shell members, thereby reducing the pressure between said pliable membranes exterior to said duct to aid dilation thereof as excess lymph is massaged into said duct.
Claim 3
Dependent Claim
35 words
A device according to claim 1 further comprising a peripheral seal around the entire lip of each shell member, thereby providing a sealed region between said pliable members adapted to contain said lymph duct portion.
Claim 4
Dependent Claim
27 words
A device according to claim 1 wherein each of said shell members is generally semi-cylindrical, and wherein a resilient seal is provided about the duct accommodating orifices.
Claim 5
Dependent Claim
151 words
A process of lymph duct cannulation comprising the steps of; placing a device according to claim 2 in surrounding relationship about a lymph duct, blocking flow through said duct proximally of said device, increasing the pressure within said confined spaces to force said pliable membranes into engagement with said lymph duct, reducing the pressure within said confined spaces to cause said pliable membranes to move toward the respective shell members, thereby reducing pressure in said sealed region between said pliable members so as to aid dilation of said duct, while massaging lymph into the portion of said duct surrounded by said device from a region distal thereof, inserting a cannulation needle into the lumen of said dilated duct portion, said needle being inserted through the device orifice, at the distal end of said duct, and releasing said proximal blockage to permit injection in the proximal direction of material via said needle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |