Question

Which of the following is the most common method used to know depth of anaesthesia?

• A. BIS
• B. Oesophageal contractility
• C. Depressed responses
• D. Hypotension

Answer 1

The Correct Option is A

The most common method used to know the depth of anesthesia is through the use of the Bispectral Index, commonly abbreviated as BIS. BIS is a monitoring system that measures the effects of anesthetics on the brain and provides a numerical value that indicates the patient’s level of consciousness. This tool is widely utilized due to its ability to provide real-time feedback and its effectiveness in helping anesthetists maintain the appropriate anesthesia level during surgeries. In comparison to the other options:

• Oesophageal contractility: This is not typically used for assessing anesthesia depth; instead, it relates more to gastrointestinal motility.
• Depressed responses: Refers to a general state and is not a specific method for assessing anesthesia depth.
• Hypotension: A potential side effect of anesthesia, but not a direct method to assess its depth.

Therefore, BIS is the preferred and most reliable method among the choices given.