US4207887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas insufflation apparatus
Assignee: Richard Wolf GmbH
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Filing: 1978-06-26
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Granted: 1980-06-17
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Expires: 1998-06-26
Abstract
Abstract Insufflation gas from a compressed gas source is introduced into a body cavity through a tube connected to the source by an insufflation duct, the pressure in the body cavity being measured by a pressure gauge connected to the body cavity by a measuring duct, and any deviations from a preselected gas pressure for the body cavity being sensed in the measuring duct by control means operative to open or close a valve in the insufflation duct to control the pressure of the gas in the body cavity.
Inventors
- 👤 Siegfried Hiltebrandt
- 👤 Helmut Wurster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:11
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0051; A61M13/00; A61M13/003; A61M16/021; A61M16/022
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
236 words
A gas insufflation apparatus for filling a body cavity with intracorporeal insufflating gas at a constant pressure level and maintaining the pressure of the gas within the body cavity constantly at a single fixed pre-selected pressure level, said apparatus comprising: (a) a source of compressed insufflating gas which is either carbon dioxide or nitrous oxide; (b) an insufflation duct connected to said compressed gas source and canula means connected to said insufflation duct insertable into the body cavity for introducing the gas thereinto; (c) measuring duct means insertable into the body cavity or receiving gas from the body cavity thereby to measure the intracorporeal gas pressure; (d) a solenoid valve interposed in said insufflation duct and electrical circuit means for automatically controlling said solenoid valve for admitting a flow of the compressed gas, and shutting off the flow of compressed gas, in said insufflation duct; (e) a variable pressure regulator interposed in the insufflation duct between the source of compressed gas and said valve by means of which a desired body cavity pressure may be pre-selected; and (f) pressure sensitive switch means responsive to pressure in said measuring duct and having normally open contacts interposed in said circuit means said contacts being set to close at a predetermined intracorporeal pressure thereby completing the circuit to said solenoid valve solely in response to an upper deviation from said predetermined pressure of the gas in said body cavity.
Claim 2
Dependent Claim
236 words
A gas insufflation apparatus for filling a body cavity with intracorporeal insufflating gas at a constant pressure level and maintaining the pressure of the gas within the body cavity constantly at a single fixed pre-selected pressure level, said apparatus comprising: (a) a source of compressed insufflating gas which is either carbon dioxide or nitrous oxide; (b) an insufflation duct connected to said compressed gas source and canula means connected to said insufflation duct insertable into the body cavity for introducing the gas thereinto; (c) measuring duct means insertable into the body cavity or receiving gas from the body cavity thereby to measure the intracorporeal gas pressure; (d) a solenoid valve interposed in said insufflation duct and electrical circuit means for automatically controlling said solenoid valve for admitting a flow of the compressed gas, and shutting off the flow of compressed gas, in said insufflation duct; (e) a variable pressure regulator interposed in the insufflation duct between the source of compressed gas and said valve by means of which a desired body cavity pressure may be pre-selected; and (f) pressure sensitive switch means responsive to pressure in said measuring duct and having normally open contacts interposed in said circuit means said contacts being set to close at a predetermined intracorporeal pressure thereby completing the circuit to said solenoid valve solely in response to an upper deviation from said predetermined pressure of the gas in said body cavity.
Claim 3
Dependent Claim
59 words
A gas insufflation apparatus according to claim 1, wherein said measuring duct comprises a tubular member disposed along side said canula, said tubular member having a distal end which opens into the body cavity and having a proximal end connected to said pressure sensitive switch means for communicating the intracorporeal gas pressure which controls said pressure sensitive switch means.
Claim 4
Dependent Claim
61 words
A gas insufflation apparatus according to claim 1, wherein said measuring duct comprises a shell-like member which surrounds said canula in spaced relationship thereto, said shell-like member having a distal end which opens into the body cavity and having a proximal end connected to said pressure sensitive switch means for communicating intracorporeal gas pressure for controlling said pressure sensitive switch means.
Claim 5
Dependent Claim
175 words
An insufflation apparatus as claimed in claim 1, and further comprising a gas supply line connecting said insufflation duct to said compressed gas source, a pressure gauge in the gas supply line for measuring the pressure of the gas of said compressed gas source, a pressure reducer connected in said gas supply line upstream of said pressure gauge, a shut-off valve connected in said gas supply line downstream of said pressure reducer, an intermediate gas container connected in said gas supply line downstream of said shut-off valve, said intermediate container having a safety valve, a gauge for indicating the pressure and quantity of gas in said intermediate container, a pressure regulator connected to said intermediate container and connected in said gas supply line downstream of said insufflation duct, a manually operable valve connected in the supply line for admitting insufflation gas into the insufflation duct between said solenoid valve therein and said canula, and a pressure gauge connected to said measuring duct means for monitoring the pressure of the gas supplied to the body cavity.
Claim 6
Dependent Claim
22 words
Insufflation apparatus according to claim 4 in which the last-named pressure gauge includes means operably connected to said pressure sensitive switch means.
Claim 7
Dependent Claim
22 words
Insufflation apparatus according to claim 1 in which the pressure sensitive switch means is selectively settable to a pre-selected intracorporeal gas pressure.
Claim 8
Dependent Claim
50 words
Insufflation apparatus according to claim 1 comprising second valve means operatively responsive to said pressure sensitive switch means and a pnuematically operated alarm device, said second valve means connecting said alarm device to said gas supply duct when the gas pressure in the body cavity is critical or too high.
Claim 9
Dependent Claim
91 words
Insufflation apparatus according to claim 1 and comprising an alarm, a pressure gauge connected to said measuring duct means, said pressure sensitive switch means communicating with said pressure gauge, said pressure sensitive switch means comprising two pairs of contacts of which one pair of contacts opens or closes the circuit of said solenoid valve when the pressure in the body cavity deviates from the preselected pressure and of which the other pair of contacts operates said alarm as soon as the gas pressure in the body cavity reaches a critical level.
Claim 10
Dependent Claim
226 words
A gas insufflation apparatus for filling a body cavity with intracorporeal insufflating gas at a constant pressure level and maintaining the pressure of the gas within the body cavity constantly at a single fixed pre-selected pressure level, said apparatus comprising: (a) a source of compressed insufflating gas which is either carbon dioxide or nitrous oxide; (b) an insufflation duct connected to said compressed gas source and canula means connected to said insufflation duct and insertable into the body cavity for introducing the gas thereinto; (c) measuring duct means insertable into the body cavity for receiving gas from the body cavity thereby to measure the intracorporeal gas pressure; (d) a normally open electrically controlled valve in communication with said insufflation duct for automatically admitting a flow of the compressed gas, and shutting off the flow of compressed gas to said insufflation duct when closed; (e) a variable pressure regulator interposed in the insufflation duct between the source of compressed gas and said valve by means of which a desired body cavity pressure may be pre-selected; and (f) pressure sensitive switch means responsive to intracorporeal pressure in said measuring duct and means electrical circuit responsive to said pressure sensitive switch means for closing said controlled valve at a predetermined intracorporeal pressure in response to an upper deviation from said predetermined pressure of the gas in said body cavity.
Claim 11
Dependent Claim
226 words
A gas insufflation apparatus for filling a body cavity with intracorporeal insufflating gas at a constant pressure level and maintaining the pressure of the gas within the body cavity constantly at a single fixed pre-selected pressure level, said apparatus comprising: (a) a source of compressed insufflating gas which is either carbon dioxide or nitrous oxide; (b) an insufflation duct connected to said compressed gas source and canula means connected to said insufflation duct and insertable into the body cavity for introducing the gas thereinto; (c) measuring duct means insertable into the body cavity for receiving gas from the body cavity thereby to measure the intracorporeal gas pressure; (d) a normally open electrically controlled valve in communication with said insufflation duct for automatically admitting a flow of the compressed gas, and shutting off the flow of compressed gas to said insufflation duct when closed; (e) a variable pressure regulator interposed in the insufflation duct between the source of compressed gas and said valve by means of which a desired body cavity pressure may be pre-selected; and (f) pressure sensitive switch means responsive to intracorporeal pressure in said measuring duct and means electrical circuit responsive to said pressure sensitive switch means for closing said controlled valve at a predetermined intracorporeal pressure in response to an upper deviation from said predetermined pressure of the gas in said body cavity.
Claim 12
Dependent Claim
59 words
A gas insufflation apparatus according to claim 9, wherein said measuring duct comprises a tubular member disposed along side said canula, said tubular member having a distal end which opens into the body cavity and having a proximal end connected to said pressure sensitive switch means for communicating the intracorporeal gas pressure which controls said pressure sensitive switch means.
Claim 13
Dependent Claim
61 words
A gas insufflation apparatus according to claim 9, wherein said measuring duct comprises a shell-like member which surrounds said canula in spaced relationship thereto, said shell-like member having a distal end which opens into the body cavity and having a proximal end connected to said pressure sensitive switch means for communicating intracorporeal gas pressure for controlling said pressure sensitive switch means.
Claim 14
Dependent Claim
183 words
An insufflation apparatus as claimed in claim 9, and further comprising a gas supply line connecting said insufflation duct to said compressed gas source, a pressure gauge in the gas supply line for measuring the pressure of the gas of said compressed gas source, a pressure reducer connected in said gas supply line upstream of said pressure gauge, a shut-off valve connected in said gas supply line downstream of said pressure reducer, an intermediate gas container connected in said gas supply line downstream of said shut-off valve, said intermediate container having a safety valve, a gauge for indicating the pressure and quantity of gas in said intermediate container, a pressure regulator connected to said intermediate container and connected in said gas supply line downstream of said insufflation duct, a manually operable valve connected in the supply line for admitting insufflation gas into the insufflation duct, a flow control device in said insufflation duct between said solenoid valve therein and said canula, and a pressure gauge connected to said measuring duct means for monitoring the pressure of the gas supplied to the body cavity.
Claim 15
Dependent Claim
23 words
Insufflation apparatus according to claim 12 in which the last named pressure gauge includes means operably connected to said pressure sensitive switch means.
Claim 16
Dependent Claim
22 words
Insufflation apparatus according to claim 9 in which the pressure sensitive switch means is selectively settable to a pre-selected intracorporeal gas pressure.
Claim 17
Dependent Claim
50 words
Insufflation apparatus according to claim 9 comprising second valve means operatively responsive to said pressure sensitive switch means and a pneumatically operated alarm device, said second valve means connecting said alarm device to said gas supply duct when the gas pressure in the body cavity is critical or too high.
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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) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |