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Anesthesia machine works

Anesthesia breathing circuit of the most common is "circulatory system". Two unidirectional gas flows to absorb carbon dioxide by chemical method in the loop. In this system, fresh from the anesthesia machine downstream of the gas in a carbon dioxide canister parts and inhale a one-way valve's upper part into the breathing circuit. Incoming fresh air mixed with the original gas in the loop, inhale through a one-way valve, and flow through reusable or single use corrugated piping reach the y-pipe. Patient's exhaled gas flowing through one of the circulatory system (ex), exhale through a one-way valve into the reservoir bag. 

By pressure, positive pressure generated in the storage bag, forcing gas through carbon dioxide absorbing device for collecting. Due to the inflow of fresh air in the circuit than patients and much more absorbent consumption of gas, so you must exhale a one-way valve and install a relief valve between the carbon dioxide canister. When the pressure exceeds the specified threshold, the excess gases can escape. Absorption tank containing sodium carbonate of lime (a mixture of sodium, potassium and calcium hydroxide) or barium hydroxide containing lime (barium hydroxide, BA hydrogen hydrates and calcium hydroxide mixture). 

These substances by chemical reaction absorbs carbon dioxide, releasing heat and water (water can be released by moist air in the circulatory system). When the absorption capacity is exhausted, the indicator changes color. Absorption tank must be designed to be easy to replace the absorber. For APL is usually used to remove excess air is a spring-loaded valve. Spring tension is the control circuit pressure, if the patient breathing spontaneously, relief valve is in the open position, inhale and exhale air breathing with minimal resistance. If the patient is depth of depth of anesthesia and paralysis, the anesthesiologist can partially or totally close the relief valve, extruded airbag gas storage filled lungs, help and control patients. From the relief valve exhaust gases through the exhaust pipe leading to the outside to avoid health hazards of trace amounts of anesthetic gases on the operating room staff.

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