초록 ▼

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 ga

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.

대표청구항 ▼

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 insu

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.