Fig 1. The above image shows an “open ether” anaesthetic (ether being dripped onto a wire mask covered with gauze).
T / F It is possible to use ether as shown in Fig. 1 because it is very potent, with a low MAC.
T / F The patient in Fig. 1 is breathing room air. Administering open ether could cause the inspired oxygen concentration to be significantly reduced. (Can you explain your answer?)
T / F (If you understand the answers to the first 2 questions, this one should be easy!) The boiling point of ether is lower than sevoflurane.
Fig 2. Isoflurane vaporiser
T / F This device might contain a bimetallic strip, to provide flow compensation.
T / F If you (hypothetically!!) filled this vaporiser with sevoflurane, the % shown on the dial would be lower than the % delivered to the patient.