Medical gas humidification system
First Claim
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1. A method of delivering a medical gas in a conditioned state to a body cavity to avoid or inhibit body trauma comprising;
- directing a medical gas into a body cavity through a lumen located on a first side of a barrier permeable to water vapor but impermeable to liquid water;
flowing a pre-heated liquid through a lumen located on a second side of the barrier in a co-current and countercurrent direction to a flow direction of the medical gas to transfer heat to the medical gas through the barrier and to transfer water vapor from the pre-heated liquid as the liquid flows therethrough so that when the medical gas discharges therefrom the humidity and the temperature of the medical gas are in a conditioned state; and
monitoring a temperature of the medical gas discharging therefrom and controlling the heat transfer from the liquid to the medical gas to maintain the medical gas at a constant temperature.
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Abstract
An apparatus and method for on-the-go humidifying an insufflation gas through water vapor transfer from a liquid to the insufflation gas through a barrier separating the gas from the liquid to enable the gas in a normally trauma inducing state to be brought to a conditioned state. If the gas is at an improper insufflation temperature the temperature of the gas can be brought to the proper insufflation temperature at the same time the gas is humidified through heat transfer through the barrier.
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Citations
21 Claims
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1. A method of delivering a medical gas in a conditioned state to a body cavity to avoid or inhibit body trauma comprising;
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directing a medical gas into a body cavity through a lumen located on a first side of a barrier permeable to water vapor but impermeable to liquid water; flowing a pre-heated liquid through a lumen located on a second side of the barrier in a co-current and countercurrent direction to a flow direction of the medical gas to transfer heat to the medical gas through the barrier and to transfer water vapor from the pre-heated liquid as the liquid flows therethrough so that when the medical gas discharges therefrom the humidity and the temperature of the medical gas are in a conditioned state; and monitoring a temperature of the medical gas discharging therefrom and controlling the heat transfer from the liquid to the medical gas to maintain the medical gas at a constant temperature. - View Dependent Claims (2, 3, 4)
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5. An apparatus for delivering medical gas in a conditioned state to a body cavity comprising;
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a tube; and a fin supporting a medical gas enclosure in said tube to form a first lumen and a second lumen therein, said first lumen supporting a flow of a preheated liquid in a co-current direction to a flow direction of the medical gas supported by said medical gas enclosure and said second lumen supporting a flow of the preheated liquid in a countercurrent direction to said flow direction of the medical gas supported by said medical gas enclosure, said medical gas enclosure comprising a barrier permeable to water vapor but impermeable to liquid water, said barrier forming at least a part of the medical gas enclosure, said barrier having a first side proximate said pre-heated water for transfer of water vapor from the preheated water to a medical gas on the opposite side of the barrier to thereby bring the medical gas to a conditioned state for insufflation. - View Dependent Claims (6, 7, 8)
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9. An apparatus for delivering medical gas in a conditioned state to a body cavity comprising;
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a medical gas conduit having a first lumen supporting a flow of a medical gas, a second lumen supporting a flow of a preheated liquid in a co-current direction to a flow direction of the medical gas, and a third lumen supporting a flow of the preheated liquid in a countercurrent direction to said flow direction of the medical gas; and a liquid gas separation barrier having an end located adjacent a body cavity entry device, said liquid gas separation barrier having a first side for contacting the liquid and a second side for contacting the medical gas, said liquid gas separation barrier permitting passage of water vapor into the medical gas through the liquid gas separation barrier while at the same time preventing passage of liquid therethrough to thereby bring the medical gas to a conditioned humidification state for delivery to a patient for surgery insufflation. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification