Patent US3509929A successfully refreshed from Google Patents.
US5286259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual-diameter multifunction catheter
Assignee: Diagnostic Devices Group Ltd
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Filing: 1992-02-18
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Granted: 1994-02-15
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Expires: 2012-02-18
Abstract
Abstract A catheter (10) is disclosed having a stepped coaxial construction formed by and internal tube (12) and an external tube (14). The internal tube includes a distal pressure lumen (26), a balloon inflation lumen (28), and a sensor lumen (30). The external tube includes the first proximal pressure lumen (48), second proximal pressure lumen (50), injection lumen (52), and transducer lead lumen (54). A cylindrical transducer (16), sensor (18), and balloon (42) are supported on the internal and external tubes, which allow the transducer to be coaxially mounted thereon. The catheter has a high lumen count, large lumen cross-sectional area, is easy to construct and use, and allows cardiac output to be measured continuously without sacrificing other currently available catheter functions.
Inventors
- 👤 Dipankar Ganguly
- 👤 Faina Pulvermakher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/06; A61B5/00; A61B5/02; A61B5/021; A61B5/0215; A61B8/065; A61B8/12; A61B8/44; A61B8/4444; A61B8/445; A61M; A61M25/00; A61M25/0021; A61M25/0023; Y; Y10; Y10S; Y10S439/00; Y10S439/909
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A catheter comprising: an external tube having proximal and distal ends and being provided with a primary lumen and a plurality of secondary lumens, said primary lumen being roughly circular in cross section and each said secondary lumen roughly defining a segment of an annulus in cross section; and an internal tube having proximal and distal ends and being provided with a plurality of internal tube lumens, each said internal tube lumen roughly defining a circular sector in cross section, said internal tube being received within said primary lumen of said external tube.
Claim 2
Dependent Claim
93 words
A catheter comprising: an external tube having proximal and distal ends and being provided with a primary lumen and a plurality of secondary lumens, said primary lumen being roughly circular in cross section and each said secondary lumen roughly defining a segment of an annulus in cross section; and an internal tube having proximal and distal ends and being provided with a plurality of internal tube lumens, each said internal tube lumen roughly defining a circular sector in cross section, said internal tube being received within said primary lumen of said external tube.
Claim 3
Dependent Claim
35 words
The catheter of claim 1, further comprising: a sensor coupled to said internal tube; and communication means, received within one of said internal tube lumens and connectable to said sensor for communication with said sensor.
Claim 4
Dependent Claim
19 words
The catheter of claim 2, wherein said sensor comprises a thermistor and said communication means comprises an electrical conductor.
Claim 5
Dependent Claim
20 words
The catheter of claim 2, wherein said sensor comprises an optical cell and said communication means comprises an optical fiber.
Claim 6
Independent Claim
88 words
A method of producing a catheter comprising the steps of: producing an external tube, having proximal and distal ends, a primary lumen, and a plurality of secondary lumens, said primary lumen being roughly circular in cross section and each said secondary lumen roughly defining a segment of an annulus in cross section; and producing an internal tube in said primary lumen of said external tube, said internal tube having a plurality of internal tube lumens, each said internal tube lumen roughly defining a circular section in cross section.
Claim 7
Independent Claim
88 words
A method of producing a catheter comprising the steps of: producing an external tube, having proximal and distal ends, a primary lumen, and a plurality of secondary lumens, said primary lumen being roughly circular in cross section and each said secondary lumen roughly defining a segment of an annulus in cross section; and producing an internal tube in said primary lumen of said external tube, said internal tube having a plurality of internal tube lumens, each said internal tube lumen roughly defining a circular section in cross section.
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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) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |