US4044757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cholangiography device and method
Assignee: BAE Systems Electronics Ltd
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Filing: 1976-01-14
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Granted: 1977-08-30
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Expires: 1996-01-14
Abstract
Abstract A device for use in cholangiography and similar procedures comprising, a first syringe having a barrel defining a chamber for retaining an irrigation liquid, and a plunger having one end received in the chamber for pumping the liquid from the chamber. The device has a second syringe having a barrel defining a chamber for retaining a liquid contrast medium, and a plunger having one end received in the chamber of the second syringe for pumping the contrast medium from the chamber. The device has a catheter having a distal end, a proximal end, and a lumen extending through the catheter. The device also has means for connecting the proximal end of the catheter to the chambers of the first and second syringes without exposing the liquids to the atmosphere intermediate the lumen and chambers, in order that the irrigation liquid and contrast medium may be ejected through the catheter without introduction of air into the device.
Inventors
- 👤 Daniel M. McWhorter
- 👤 Bhupendra C. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:07
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/007; A61M3/00; A61M3/005; A61M3/02; A61M3/0233; A61M3/0254; A61M3/0262; A61M5/14; A61M5/1407; A61M5/1408; A61M5/142; A61M5/145; A61M5/1452; A61M5/1456; A61M39/00; A61M39/22; A61M39/223; A61M5/178; A61M5/19
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
207 words
A device for use in cholangiography and similar procedures, comprising: a first syringe having a barrel defining a chamber for retaining an irrigation liquid, and a plunger having one end received in said chamber for pumping the liquid from said chamber; a second syringe having a barrel defining a chamber for retaining a liquid contrast medium, and a plunger having one end received in the chamber of the second syringe for pumping the contrast medium from said chamber; a catheter having a distal end, a proximal end, and a lumen extending through the catheter; means for connecting the proximal end of said catheter to the chambers of the first and second syringes without exposing the liquids to the atmosphere intermediate the lumen and chambers, whereby the irrigation liquid and contrast medium may be ejected through the catheter without introduction of air into the device; and a plate, said syringes being secured to said plate, a pair of elongated arms each having one end secured to said plungers and the other ends being slotted and slidably secured to said plate, screws secured to said plate and positioned in said slots to releasably lock said arms to in turn lock said plungers at any inner or outer selected position.
Claim 2
Independent Claim
207 words
A device for use in cholangiography and similar procedures, comprising: a first syringe having a barrel defining a chamber for retaining an irrigation liquid, and a plunger having one end received in said chamber for pumping the liquid from said chamber; a second syringe having a barrel defining a chamber for retaining a liquid contrast medium, and a plunger having one end received in the chamber of the second syringe for pumping the contrast medium from said chamber; a catheter having a distal end, a proximal end, and a lumen extending through the catheter; means for connecting the proximal end of said catheter to the chambers of the first and second syringes without exposing the liquids to the atmosphere intermediate the lumen and chambers, whereby the irrigation liquid and contrast medium may be ejected through the catheter without introduction of air into the device; and a plate, said syringes being secured to said plate, a pair of elongated arms each having one end secured to said plungers and the other ends being slotted and slidably secured to said plate, screws secured to said plate and positioned in said slots to releasably lock said arms to in turn lock said plungers at any inner or outer selected position.
Claim 3
Dependent Claim
26 words
The device of claim 1 wherein the connecting means selectively connects the proximal end of the catheter to the chambers of said first and second syringes.
Claim 4
Dependent Claim
21 words
The device of claim 1 wherein said catheter has an outer bead spaced slightly from the distal end of the catheter.
References Cited (Backward Citations)
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US1696018A
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US2112160A
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US2739591A
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US3399668A
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US3888239A
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US3918456A
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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) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |