초록 ▼

A system for administering gas to a patient during an endoscopic or medical procedure includes elements for regulating the temperature, pressure, and volumetric flow rate of the gas. A gas source operating with a heated pressure regulator and filter provide a smoothly regulated flow of any medically

A system for administering gas to a patient during an endoscopic or medical procedure includes elements for regulating the temperature, pressure, and volumetric flow rate of the gas. A gas source operating with a heated pressure regulator and filter provide a smoothly regulated flow of any medically necessary gas, such as CO2, to a main body of the gas delivery system. The main body comprises a primary heater for control of the temperature of the gas administered to the patient, a fine pressure regulator for controlling its pressure in a safe manner, and a flow regulator for controlling its volumetric flow rate. Temperature, pressure, and volumetric flow rate indicators allow the physician continuous monitoring of the quantitative status of each of these important physiologic parameters; this data may also be recorded for documentation purposes. The system allows increased safety in endoscopic or medical procedures in which gas is used, greater operational convenience for the physician, enhanced quantitative observation and documentation capability, while retaining flexibility in using conventional alternate gas sources.

대표청구항 ▼

A gas delivery system for use in an endoscopic or medical procedure involving a patient, comprising: a gas source supplying gas for use in the endoscopic or medical procedure; a heated pressure regulator, connected to and receiving gas from the gas source, for pre-heating the gas to ensure that it i

A gas delivery system for use in an endoscopic or medical procedure involving a patient, comprising: a gas source supplying gas for use in the endoscopic or medical procedure; a heated pressure regulator, connected to and receiving gas from the gas source, for pre-heating the gas to ensure that it is in its gaseous state and for initially regulating the pressure of the gas; a gas source output pressure gauge, connected to the heated pressure regulator, for measuring the pressure of the gas output through the heated pressure regulator; a filter, connected to the heated pressure regulator, for receiving the heated gas from the heated pressure regulator and filtering out foreign matter from the gas; a gas delivery system main body, connected to an output of the filter for receiving filtered gas, comprising: (a) a primary heater for heating the gas from the filter to a temperature having a relationship to a physiologically desired temperature for administration to the patient; (b) a temperature sensor, connected to an output of the primary heater, for measuring the temperature of the gas exiting the primary heater; (c) a thermostat, connected to an output of the temperature sensor and to an input of the primary heater, for receiving temperature measurements from the temperature sensor, for governing the primary heater in regulating the temperature of the gas; (d) a fine pressure regulator, for controlling the pressure of the gas administered to the patient in the endoscopic or medical procedure; and (e) a volumetric flow regulator, for controlling the volumetric flow rate of the gas administered to the patient in the endoscopic or medical procedure; wherein the primary heater, fine pressure regulator, and volumetric flow regulator are connected substantially in series, not necessarily in the recited order; a temperature indicator, a pressure indicator, and a flow meter, connected, respectively, to the temperature sensor, the fine pressure regulator, and the volumetric flow regulator, for respectively indicating the temperature, pressure and volumetric flow rate of the gas; a recording medium, connected to the temperature sensor, fine pressure regulator and volumetric flow regulator, for recording the temperature, pressure, and volumetric flow rate of the gas as a function of time during the endoscopic or medical procedure; an endoscopic light source comprising a compressed air source for producing compressed air as an alternative gas; and a valve assembly, connected to the main body and to the endoscopic light source, for controllably directing either (1) the gas from the main body, or (2) the compressed air from the endoscopic light source compressed air source, into an endoscope for administration to the patient.