Maximum safe dose of lignocaine for spinal anesthesia is
**Core Concept**
The maximum safe dose of **lignocaine** (also known as **lidocaine**) for spinal anesthesia is crucial to prevent **toxicity**. **Lignocaine** is a **local anesthetic** that works by blocking **sodium channels**.
**Why the Correct Answer is Right**
The correct dose is based on the patient's weight and the desired **anesthetic effect**, considering factors like **protein binding** and **metabolism**. For spinal anesthesia, the recommended dose is typically around 100 mg.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it exceeds the recommended dose.
**Option B:** Similarly, this option is also incorrect as it is higher than the safe dose.
**Option D:** This option is incorrect as well, being too high for safe administration.
**Clinical Pearl / High-Yield Fact**
Remember, the maximum safe dose of **lignocaine** for spinal anesthesia is crucial to prevent **central nervous system toxicity** and **cardiovascular collapse**.
**Correct Answer:** D. 100 mg