Which characteristic does NOT apply to diethyl ether?

Which characteristic does NOT apply to diethyl ether?

• A. Flammable
• B. Humane anesthetic agent
• C. Slow induction of anesthesia
• D. Explosive when mixed with room air

Answer: (B)

Diethyl ether’s unsafe and slow-acting nature is the key idea here. It is extremely flammable and can form explosive vapour–air mixtures, which makes it a major fire hazard in the operating room. Its onset and recovery are slow because it dissolves well in blood (high blood–gas solubility), so it takes longer to reach and clear from the brain, giving a gradual, less controllable anesthesia. In addition, it irritates the airway and can cause coughing or laryngospasm, leading to a rougher induction and recovery rather than a smooth, humane experience for the patient. Because of these safety and comfort issues, diethyl ether is not considered a humane anesthetic agent, even though it was historically used. The other characteristics—flammability, slow induction, and explosive potential in air—are accurate for ether.

Diethyl ether’s unsafe and slow-acting nature is the key idea here. It is extremely flammable and can form explosive vapour–air mixtures, which makes it a major fire hazard in the operating room. Its onset and recovery are slow because it dissolves well in blood (high blood–gas solubility), so it takes longer to reach and clear from the brain, giving a gradual, less controllable anesthesia. In addition, it irritates the airway and can cause coughing or laryngospasm, leading to a rougher induction and recovery rather than a smooth, humane experience for the patient. Because of these safety and comfort issues, diethyl ether is not considered a humane anesthetic agent, even though it was historically used. The other characteristics—flammability, slow induction, and explosive potential in air—are accurate for ether.