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Medical-grade soda lime includes an indicating dye that changes color when it reaches its carbon dioxide absorption capacity. To ensure proper functioning, a carbon dioxide scrubber (or soda lime canister) should not be used if the indicating dye is activated. Standard anesthesia machines typically contain up to 2 kilograms (4.4 lb) of soda ...
A carbon dioxide scrubber. A carbon dioxide scrubber is a piece of equipment that absorbs carbon dioxide (CO 2).It is used to treat exhaust gases from industrial plants or from exhaled air in life support systems such as rebreathers or in spacecraft, submersible craft or airtight chambers.
A typical absorbent is soda lime, which is made up of calcium hydroxide Ca(OH) 2, and sodium hydroxide NaOH. The main component of soda lime is calcium hydroxide, which is relatively cheap and easily available. Other components may be present in the absorbent. Sodium hydroxide is added to accelerate the reaction with carbon dioxide.
A simple whole plant respirometer designed to measure oxygen uptake or CO 2 release consists of a sealed container with the living specimen together with a substance to absorb the carbon dioxide given off during respiration, such as soda lime pellets or cotton wads soaked with potassium hydroxide. The oxygen uptake is detected by manometry. [5]
Recirculating (rebreather) systems, use soda lime to absorb carbon dioxide, in the scrubber, so that expired gas becomes suitable to re-use. With a very efficient recirculation system, the fresh gas flow may be reduced to the patient's minimum oxygen requirements (e.g. 250ml/min), plus a little volatile as needed to maintain the concentration ...
Baralyme is a mixture of 80% calcium hydroxide and 20% barium hydroxide compounds [1] [2] [3] that is used as an alternative to soda lime to absorb the exhaled carbon dioxide in a closed circuit anesthetic system.
The absorbent used for non-regenerative carbon dioxide absorption is usually sodalime, or a material based on sodalime, but in former times slaked lime or quicklime or caustic soda was sometimes used. [citation needed] Rebreathers using chemical oxygen generation can be small, light and easy to wear.
The B circuit is not in clinical use, but the C circuit is commonly used during patient transfer and in resuscitation as it is compact. The Waters bag, developed by Ralph Waters, comprises a C system with an attached soda lime absorption canister to remove exhaled carbon dioxide, meaning that exhaled gases can safely be rebreathed.
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