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Soda lime canister used in anaesthetic machines to act as a carbon dioxide scrubber. Soda lime, a mixture of sodium hydroxide (NaOH) and calcium oxide (CaO), is used in granular form within recirculating breathing environments like general anesthesia and its breathing circuit, submarines, rebreathers, and hyperbaric chambers and underwater habitats.
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 ...
The scrubber canister generally has an inlet on one side and an outlet on the other side. 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.
The thermal decomposition of calcite is performed in a lime kiln fired with oxygen in order to avoid an additional gas separation step. Hydration of the lime (CaO) completes the cycle. Lime hydration is an exothermic reaction that can be performed with water or steam. Using water, it is a liquid/solid reaction as shown here: CaO(s) + H 2 O (l ...
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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It is also cheap to manufacture; easy to transport and store; easy to administer and monitor with standard operating room equipment; stable to light, plastics, metals, rubber and soda lime; and non-flammable and environmentally safe. None of the agents currently in use are ideal, although many have some of the desirable characteristics.
Ingredients. 4.5 ounces lemon club soda, like Betty Buzz Meyer Lemon Club Soda. 1.5 ounces tequila. Pineapple juice, as much as desired. Pineapple slice to garnish