Which of the following is the induction agent of choice in day care anaesthesia?
**Core Concept**
The question is testing the knowledge of induction agents used in day care anesthesia, specifically the choice of agent that is suitable for patients undergoing short procedures under regional or general anesthesia. Day care anesthesia requires a rapid onset of action, minimal side effects, and quick recovery.
**Why the Correct Answer is Right**
Propofol is the induction agent of choice in day care anesthesia due to its favorable pharmacokinetic profile. It has a rapid onset of action (10-30 seconds) and a short duration of action (5-10 minutes), making it ideal for short procedures. Propofol also has a low incidence of residual sedation and no cumulative effect, allowing patients to recover quickly and be discharged on the same day.
**Why Each Wrong Option is Incorrect**
* **Option A:** Thiopentone has a slower onset of action compared to propofol and can cause more residual sedation, making it less suitable for day care anesthesia.
* **Option B:** Ketamine can cause significant sympathetic stimulation, hallucinations, and increased intraocular pressure, making it less ideal for day care anesthesia.
* **Option D:** Midazolam is a benzodiazepine with a slower onset of action and longer duration of action compared to propofol, making it less suitable for rapid induction in day care anesthesia.
**Clinical Pearl / High-Yield Fact**
When choosing an induction agent for day care anesthesia, consider the patient's medical history, the type of procedure, and the desired speed of recovery. Propofol is a good choice for most patients, but ketamine may be preferred in patients with a history of respiratory depression or who require analgesia.
**Correct Answer:** C. Propofol.