US5152745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insufflator
Assignee: Olympus Corp
•
Filing: 1990-08-15
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Granted: 1992-10-06
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Expires: 2010-08-15
Abstract
Abstract By means of the invention, the pressure in a cavity can be measured, without ever reducing the gas flow to zero. This is achieved by bleeding an intermediate vessel slightly with its inlet valve closed and its outlet valve open and then being able to extrapolate from the pressure decrease whether the desired pressure has been reached. If the result of the extrapolation indicates that the desired pressure has not been reached, then pumping is repeated, measuring is repeated and so on and so forth until the extrapolation indicates that the desired pressure has been reached. Thus extrapolations are made instead of allowing the intermediate vessel to empty completely.
Inventors
- 👤 Rolf Steiner
- 👤 Volker Walz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
A; A61; A61M; A61M13/00; A61M13/003
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
268 words
An insufflator by means of which the pressure of a fluid insufflated into a human or animal body cavity can be measured and controlled, comprising: an inlet line, a first valve device following said inlet line, a second valve device provided downstream of said first valve device, said second valve device following said inlet line, a second valve device provided downstream of said first valve device, said second valve device being a CLOSED-OPEN device having variable CLOSED-OPEN times, an intermediate vessel for said fluid provided between said first and said second valve devices, an outlet line downstream of said first valve device, said second valve device and said intermediate vessel, conduit means for conveying fluid between said inlet line and said first valve device and between said first valve device and said intermediate vessel and between said intermediate vessel and said second valve device and between said second valve device and said outlet line, a logic device, a pressure/voltage converter connected between said intermediate vessel and said logic device for applying signals to said logic device corresponding to falling pressures in said intermediate vessel, said logic devices being comprised of means for registering the values of said signals and means for calculating the pressure of said fluid in said body cavity as a function of signals corresponding to at least two falling pressures in said intermediate vessel that occur successively in time, said logic device being arranged to control said first valve device and said second valve device, and a pressure indicator controlled by said logic device for indicating the pressure of said fluid in said body cavity.
Claim 2
Dependent Claim
268 words
An insufflator by means of which the pressure of a fluid insufflated into a human or animal body cavity can be measured and controlled, comprising: an inlet line, a first valve device following said inlet line, a second valve device provided downstream of said first valve device, said second valve device following said inlet line, a second valve device provided downstream of said first valve device, said second valve device being a CLOSED-OPEN device having variable CLOSED-OPEN times, an intermediate vessel for said fluid provided between said first and said second valve devices, an outlet line downstream of said first valve device, said second valve device and said intermediate vessel, conduit means for conveying fluid between said inlet line and said first valve device and between said first valve device and said intermediate vessel and between said intermediate vessel and said second valve device and between said second valve device and said outlet line, a logic device, a pressure/voltage converter connected between said intermediate vessel and said logic device for applying signals to said logic device corresponding to falling pressures in said intermediate vessel, said logic devices being comprised of means for registering the values of said signals and means for calculating the pressure of said fluid in said body cavity as a function of signals corresponding to at least two falling pressures in said intermediate vessel that occur successively in time, said logic device being arranged to control said first valve device and said second valve device, and a pressure indicator controlled by said logic device for indicating the pressure of said fluid in said body cavity.
Claim 3
Dependent Claim
17 words
An insufflator as claimed in claim 1, wherein said first valve device is a CLOSED-OPEN valve device.
Claim 4
Dependent Claim
17 words
An insufflator as claimed in claim 1, wherein, for holding gaseous fluids, said intermediate vessel is rigid.
Claim 5
Dependent Claim
77 words
An insufflator as claimed in claim 1, wherein said input line leads to a branching point, at least two branches, each of which includes first and second valve devices and an intermediate vessel, are arranged parallel to one another and merge via a junction point into said outlet line, and said first and second valve devices in each of said branches are connected to said logic device and are activatable in a manner offset in time periods.
Claim 6
Dependent Claim
24 words
An insufflator as claimed in claim 4, wherein a plurality of pressure/voltage converters connect said intermediate vessels in said branches of said logic device.
Claim 7
Dependent Claim
21 words
An insufflator as claimed in claim 1, wherein said first valve device is a CLOSED-OPEN valve device having variable CLOSED-OPEN times.
Claim 8
Dependent Claim
74 words
An insufflator as claimed in claim 1 or 6, wherein said logic device is comprised of means for calculating the pressure of fluid in said body cavity as a function of signals corresponding to the fall in pressure in said intermediate vessel whereby the more filling cycles that are provided for said intermediate vessel, the greater the difference between the actually calculated pressure of said fluid in said body cavity and desired pressure therein.
Claim 9
Dependent Claim
17 words
An insufflator as claimed in claim 1, further comprising a fluid-quantity indicator controlled by said logic device.
Claim 10
Dependent Claim
17 words
An insufflator as claimed in claim 1, further comprising a buffer vessel following said second valve device.
Claim 11
Dependent Claim
26 words
An insufflator as claimed in claim 1, wherein said logic device is comprised of means for preventing opening of said first and second valve devices simultaneously.
Claim 12
Dependent Claim
39 words
An insufflator as claimed in claim 1, wherein said intermediate vessel has a defined module of elasticity that is effective for holding incompressible fluids in the pressure range used in said conduit means downstream of said first valve device.
References Cited (Backward Citations)
US3870072A
Cited
US4527600A
Cited
US4676774A
Cited
US4874362A
Cited
US4966578A
Cited
US5013294A
Cited
US5006997A
Cited
US5098375A
Cited
US5006109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |