US5176629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irrigation system for use with endoscopic procedure
Assignee: CR Bard Inc
•
Filing: 1991-09-20
•
Granted: 1993-01-05
•
Expires: 2011-09-20
Abstract
Abstract An irrigation system for irrigating and pressurizing a body cavity during an endoscopic procedure, such as during arthroscopy, includes a source of irrigation liquid, a pneumatically driven pump for pumping irrigation liquid from the source into the body cavity. The pump develops pulsatile flow and its operation is controlled by a pressure regulator that regulates the pressure of air applied to the pump. The system enables disablement of the pumping function of the pump while permitting gravity flow of irrigation liquid to the body cavity. The pump and associated tubing is inexpensive and adapted for one-time, disposable use.
Inventors
- 👤 Karen E. Kullas
- 👤 Craig S. Nevers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:03
CPC Classifications
A; A61; A61M; A61M3/00; A61M3/02; A61M3/0233; A61M3/0204; A61M3/0208; A61M3/0212; A61M3/0216; A61M3/022; A61M3/0254; F; F04; F04B; F04B43/00; F04B43/02; F04B43/06; F04B49/00; F04B49/22; A61M2205/00; A61M2205/33; A61M2205/3331; A61M2205/3344; A61M3/0241; A61M3/0275; F02; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
162 words
An irrigation system for irrigating, and automatically maintaining a constant fluid pressure in, a body cavity during an endoscopic procedure comprising: a source of irrigation liquid; a first, inflow conduit for delivering irrigation liquid into the body cavity; a pressurized fluid driven pump means for pumping liquid from the source to the inflow conduit at a variable fluid flow rate, said pump having an output and constructed to produce an average fluid pressure at the pump output which average pressure is proportional to the pressure of fluid that drives the pump; pressure regulating means for regulating the pressure of the driving fluid to a value which is substantially constant around a selected value; a second conduit connecting the source of irrigation liquid with the pump; a third, outflow conduit adapted to direct flow of irrigation liquid out of the body cavity; and means for regulating flow of irrigation liquid out of the body cavity so that fluid pressure develops in the cavity.
Claim 2
Dependent Claim
162 words
An irrigation system for irrigating, and automatically maintaining a constant fluid pressure in, a body cavity during an endoscopic procedure comprising: a source of irrigation liquid; a first, inflow conduit for delivering irrigation liquid into the body cavity; a pressurized fluid driven pump means for pumping liquid from the source to the inflow conduit at a variable fluid flow rate, said pump having an output and constructed to produce an average fluid pressure at the pump output which average pressure is proportional to the pressure of fluid that drives the pump; pressure regulating means for regulating the pressure of the driving fluid to a value which is substantially constant around a selected value; a second conduit connecting the source of irrigation liquid with the pump; a third, outflow conduit adapted to direct flow of irrigation liquid out of the body cavity; and means for regulating flow of irrigation liquid out of the body cavity so that fluid pressure develops in the cavity.
Claim 3
Dependent Claim
19 words
An irrigation system as defined in claim 1 wherein the pump means is constructed to develop a pulsatile output.
Claim 4
Dependent Claim
17 words
An irrigation system as defined in claims 1 or 2 wherein the pump means is pneumatically driven.
Claim 5
Dependent Claim
21 words
An irrigation system as defined in claim 3 wherein the pump means and second conduit are comprised of a polymeric material.
Claim 6
Dependent Claim
35 words
An irrigation system as defined in claims 1 or 2 wherein the pump means is constructed and arranged to enable gravity flow of liquid through the pump means when the pump means is not operating.
Claim 7
Dependent Claim
115 words
An irrigation system as defined in claim 5 wherein said gravity flow is enabled by means comprising: the pump means having a movable pump element separating the pump means into a pumping chamber and a driving chamber; the pump means being so constructed and arranged that the movable pump element does not obstruct flow of liquid through the pumping chamber; said first and second conduits being connected to the pumping chamber; one-way valve means associated with a flow path extending through said conduits and said pumping chamber for establishing one-way flow toward the body cavity; whereby upon disablement of the pump means, irrigation liquid may flow by gravity through the system to the body cavity.
Claim 8
Dependent Claim
23 words
An irrigation system as defined in claim 6 wherein the movable pump element comprises a diaphragm adapted to oscillate within the pump means.
Claim 9
Dependent Claim
21 words
An irrigation system as defined in claim 7 wherein the pump means and second conduit are comprised of a polymeric material.
Claim 10
Dependent Claim
43 words
An irrigation system as defined in claim 7 further comprising: said pump means being constructed and arranged to shut off automatically when a predetermined output pressure level has been reached and to restart immediately when the output pressure drops below said predetermined level.
Claim 11
Dependent Claim
16 words
An irrigation system as defined in claim 6 wherein the system is free of electrical devices.
Claim 12
Dependent Claim
21 words
An irrigation system as defined in claim 6 wherein the pump means and second conduit are comprised of a polymeric material.
Claim 13
Dependent Claim
43 words
An irrigation system as defined in claim 6 further comprising: said pump means being constructed and arranged to shut off automatically when a predetermined output pressure level has been reached and to restart immediately when the output pressure drops below said predetermined level.
Claim 14
Dependent Claim
21 words
An irrigation system as defined in claim 5 wherein the pump means and second conduit are comprised of a polymeric material.
Claim 15
Dependent Claim
43 words
An irrigation system as defined in claim 5 further comprising: said pump means being constructed and arranged to shut off automatically when a predetermined output pressure level has been reached and to restart immediately when the output pressure drops below said predetermined level.
Claim 16
Dependent Claim
18 words
An irrigation system as defined in claims 1 or 2 wherein the system is free of electrical devices.
Claim 17
Dependent Claim
21 words
An irrigation system as defined in claims 1 or 2 further comprising an adjustable restrictor clamp associated with the first conduit.
Claim 18
Dependent Claim
43 words
An irrigation system as defined in claim 16 further comprising: said pump means being constructed and arranged to shut off automatically when a predetermined output pressure level has been reached and to restart immediately when the output pressure drops below said predetermined level.
Claim 19
Dependent Claim
18 words
An irrigation system as defined in claim 1 wherein the pressure regulator has a fixed maximum output limit.
Claim 20
Dependent Claim
29 words
An irrigation system as defined in claim 18 wherein said maximum limit corresponds, in conjunction with the pump means, to a pump output pressure of about 300 mm Hg.
Claim 21
Dependent Claim
25 words
An irrigation system as defined in claims 1, 2, 18 or 19 wherein the pump means and second conduit are comprised of a polymeric material.
Claim 22
Dependent Claim
58 words
An irrigation system for irrigating a body cavity during an endoscopic procedure as defined in any of claims 1, 2, 18 or 19 further comprising: said pump means being constructed and arranged to shut off automatically when a predetermined output pressure level has been reached and to restart immediately when the output pressure drops below said predetermined level.
Claim 23
Independent Claim
161 words
An apparatus for use in an irrigation system for irrigating a body cavity with an irrigation liquid from an irrigation source and maintaining a constant liquid pressure in the body cavity during an endoscopic procedure, the system having means for restricting irrigation liquid from flowing out of the body cavity to cause liquid pressure to build up inside of the body cavity, the apparatus comprising: a first inflow conduit for delivering irrigation liquid into the body cavity; a pressurized fluid driven pump means for pumping liquid from the irrigation source to the inflow conduit at a variable flow rate, said pump having an output connected to the first inflow conduit and constructed to produce an average fluid pressure at the pump output which average fluid pressure is substantially proportional to the pressure of fluid that drives the pump; and pressure regulating means for regulating the pressure of the driving fluid to a value which is substantially constant around a selected value.
Claim 24
Independent Claim
161 words
An apparatus for use in an irrigation system for irrigating a body cavity with an irrigation liquid from an irrigation source and maintaining a constant liquid pressure in the body cavity during an endoscopic procedure, the system having means for restricting irrigation liquid from flowing out of the body cavity to cause liquid pressure to build up inside of the body cavity, the apparatus comprising: a first inflow conduit for delivering irrigation liquid into the body cavity; a pressurized fluid driven pump means for pumping liquid from the irrigation source to the inflow conduit at a variable flow rate, said pump having an output connected to the first inflow conduit and constructed to produce an average fluid pressure at the pump output which average fluid pressure is substantially proportional to the pressure of fluid that drives the pump; and pressure regulating means for regulating the pressure of the driving fluid to a value which is substantially constant around a selected value.
Claim 25
Dependent Claim
17 words
An apparatus as defined in claim 22 wherein the pump is adapted to develop a pulsatile output.
Claim 26
Independent Claim
31 words
An apparatus as defined in claims 22 or 23 wherein the pump is constructed and arranged to enable gravity flow of liquid through the pump when the pump is not operating.
Claim 27
Dependent Claim
16 words
An apparatus as defined in claim 24 wherein the apparatus is comprised of a polymeric material.
Claim 28
Dependent Claim
109 words
An apparatus as defined in claim 24 wherein said gravity flow is enabled by means comprising the pump having a movable pump element separating the pump into a pumping chamber and a driving chamber; the pump being so constructed and arranged that the pumping element does not obstruct flow of liquid through the pumping chamber; said first and second conduits being connected to the pump chamber; one-way valve means associated with the flow path extending through said conduits and said pumping chamber for establishing one-way flow toward the body cavity; whereby upon disablement of the pump, irrigation liquid may flow by gravity through the system to the body cavity.
Claim 29
Dependent Claim
16 words
An apparatus as defined in claim 26 wherein the apparatus is comprised of a polymeric material.
Claim 30
Dependent Claim
21 words
An apparatus as defined in claim 26 wherein the movable pump element comprises a diaphragm adapted to oscillate within the pump.
Claim 31
Dependent Claim
16 words
An apparatus as defined in claim 28 wherein the apparatus is comprised of a polymeric material.
Claim 32
Dependent Claim
13 words
An apparatus as defined in claim 22 wherein the pump is pneumatically driven.
Claim 33
Independent Claim
18 words
An apparatus as defined in any of claims 22-30 wherein the apparatus is comprised of a polymeric material.
Claim 34
Dependent Claim
47 words
An apparatus as defined in claim 22 further comprising: regulating means connected between the pump and a source of pressurized driving fluid for regulating the pressure of the driving fluid so that the liquid pressure in the body cavity can be controlled by adjusting the regulating means.
Claim 35
Independent Claim
143 words
A method for irrigating a body cavity during an endoscopic procedure comprising the steps of: providing a source of irrigation liquid; providing a first inflow conduit for delivering irrigation liquid into the body cavity; pumping, by a pressurized fluid driven pump, irrigation liquid from the source to the inflow conduit at a variable flow rate, said pump having an output connected to the first inflow conduit and constructed to produce an average fluid pressure at the pump output which average fluid pressure is substantially proportional to the pressure of fluid that drives the pump; restricting the flow of irrigation liquid out of the body cavity so that fluid pressure builds up in the body cavity; and regulating the pressure of fluid that drives the pump so that the driving fluid has an average pressure value which is substantially constant around a selected value.
Claim 36
Independent Claim
143 words
A method for irrigating a body cavity during an endoscopic procedure comprising the steps of: providing a source of irrigation liquid; providing a first inflow conduit for delivering irrigation liquid into the body cavity; pumping, by a pressurized fluid driven pump, irrigation liquid from the source to the inflow conduit at a variable flow rate, said pump having an output connected to the first inflow conduit and constructed to produce an average fluid pressure at the pump output which average fluid pressure is substantially proportional to the pressure of fluid that drives the pump; restricting the flow of irrigation liquid out of the body cavity so that fluid pressure builds up in the body cavity; and regulating the pressure of fluid that drives the pump so that the driving fluid has an average pressure value which is substantially constant around a selected value.
References Cited (Backward Citations)
US3429313A
Cited
US4117843A
Cited
US4261360A
Cited
US4635621A
Cited
US4561431A
Cited
US4655197A
Cited
US4604089A
Cited
US4662829A
Cited
US4634430A
Cited
US4650462A
Cited
US4781687A
Cited
US4820265A
Cited
US4878894A
Cited
US4902277A
Cited
GB2212066A
Cited
US4940457A
Cited
US4904246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-05 | 1996-07-06 | 1997-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-05 | 2000-07-06 | 2001-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-05 | 2004-07-06 | 2005-01-05 | $7700.00 | Window Closed / Lapsed |