US4217911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cystometry system
Assignee: Kendall Co
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Filing: 1978-10-27
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Granted: 1980-08-19
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Expires: 1998-10-27
Abstract
Abstract A cystometry system to measure the pressure-volume relationship in the bladder of a patient from a source of fluid comprising, a catheter having an elongated shaft defining an infusion lumen communicating with an infusion opening adjacent a distal end of the shaft, and a pressure lumen communicating with a pressure opening adjacent the distal end of the shaft. The system has a device for supplying a selected volume of fluid from the source to the bladder through the infusion lumen of the catheter, and a device for measuring the bladder pressure through the catheter pressure lumen.
Inventors
- 👤 Terry N. Layton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:08
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/20; A61B5/202; A61B5/204; A61B5/205; A61M; A61M25/00; A61M25/10; A61M25/1018; A61M25/10181; A61M25/10182; A61M25/10184; A61M25/10185
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
A system to measure the pressure-volume relationship in a body cavity of a patient, comprising: a source of fluid; a catheter having an elongated shaft defining an infusion lumen communicating with an infusion opening adjacent a distal end of the shaft, and a pressure lumen communicating with a pressure opening adjacent the distal end of the shaft; means for supplying a selected volume of fluid from the source to the cavity through the infusion lumen of the catheter comprising, pump means, and valve means communicating between said source, pump means, and infusion lumen, said valve means permitting passage of fluid from the supply to the pump means and preventing passage of fluid from the pump means to the supply, said valve means permitting passage of fluid under pressure from the pump means to the infusion lumen and preventing passage of fluid between the infusion lumen and the supply; and means for measuring the cavity pressure through the catheter pressure lumen.
Claim 2
Independent Claim
160 words
A system to measure the pressure-volume relationship in a body cavity of a patient, comprising: a source of fluid; a catheter having an elongated shaft defining an infusion lumen communicating with an infusion opening adjacent a distal end of the shaft, and a pressure lumen communicating with a pressure opening adjacent the distal end of the shaft; means for supplying a selected volume of fluid from the source to the cavity through the infusion lumen of the catheter comprising, pump means, and valve means communicating between said source, pump means, and infusion lumen, said valve means permitting passage of fluid from the supply to the pump means and preventing passage of fluid from the pump means to the supply, said valve means permitting passage of fluid under pressure from the pump means to the infusion lumen and preventing passage of fluid between the infusion lumen and the supply; and means for measuring the cavity pressure through the catheter pressure lumen.
Claim 3
Dependent Claim
26 words
The system of claim 1 wherein the pressure measuring means comprises a manometer communicating with the pressure lumen adjacent a proximal end of the pressure lumen.
Claim 4
Dependent Claim
32 words
The system of claim 1 wherein the catheter has an inflatable balloon adjacent the distal end of the shaft, and in which the shaft defines an inflation lumen communicating with the balloon.
Claim 5
Dependent Claim
40 words
The system of claim 1 including means for preventing passage of fluid from the supply to the infusion lumen below a predetermined pressure, and permitting passage of fluid above the predetermined pressure responsive to pressure generated by the pump means.
Claim 6
Dependent Claim
151 words
The system of claim 1 wherein the supplying means comprises a syringe, a valve assembly having a first passageway to receive a tip of the syringe adjacent a proximal end of the first passageway and communicating with the catheter infusion lumen through a distal end of the first passageway, and a second passageway communicating with the first passageway, said supplying means having a conduit communicating between an outer end of the second passageway and the supply, said valve assembly having a first valve element in the first passageway distal the second passageway, said first valve element being normally closed and opening responsive to pressure generated by the syringe to permit passage of fluid from the syringe to the catheter infusion lumen, and a second valve element in the second passageway permitting passage of fluid from the supply to the syringe and preventing passage of fluid from the syringe to the supply.
Claim 7
Dependent Claim
42 words
The system of claim 5 wherein the first valve element comprises a valve seat in the first passageway distal the second passageway, a valve member in the first passageway distal the seat, and means for biasing the valve member against the seat.
Claim 8
Dependent Claim
22 words
The system of claim 6 wherein the valve member comprises a ball, and in which the biasing means comprises a helical spring.
Claim 9
Dependent Claim
29 words
The system of claim 5 wherein the second valve element comprises a valve seat in the second passageway, and a valve member intermediate the seat and the first passageway.
Claim 10
Dependent Claim
25 words
The system of claim 8 wherein the valve member comprises a ball, and including means for retaining the ball in the proximity of the seat.
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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) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |