Practice Quiz

Veterinary Technician

Category - Anesthesia

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Soda lime is a chemical carbon dioxide absorbent used to absorb expired carbon dioxide as a patient exhales under anesthesia. The absorbent granules experience a pH change as they absorb carbon dioxide. How often should soda lime be changed?
  1. Only when the color changes to purple or pink and stays that color
  2. Every 24 to 48 hours of use
  3. Once a month
  4. Every 6 to 8 hours of use
Explanation
Answer: D - Soda lime should be changed after every 6 - 8 hours of use to prevent the non-absorption of carbon dioxide. Non-absorbing granules become brittle, hard to crush, dry, and can assist in the creation of Compound A. Reliance on the color change of the absorbent is incorrect as the granules will return to their white/off white appearance at rest.
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