In pediatric epidural anaestheisia, volume of local anaesthetic given to cause sacral dermatome block is?
**Core Concept**
Pediatric epidural anesthesia involves administering local anesthetics into the epidural space to block pain transmission. The volume of local anesthetic required to achieve a sacral dermatome block depends on the child's age and weight, as well as the specific local anesthetic used.
**Why the Correct Answer is Right**
The correct answer is 0.5-1 mL/kg. This is because the volume of local anesthetic required to block a specific dermatome is directly related to the weight of the child. A higher volume is required for larger children, while smaller children require smaller volumes. The sacral dermatomes (S2-S5) are typically blocked with a smaller volume of local anesthetic compared to the higher dermatomes. The use of a lower volume reduces the risk of toxicity and allows for more precise control over the block.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as it does not take into account the child's weight. A fixed volume of local anesthetic may not be sufficient for larger children.
* **Option B:** This option is incorrect as it is too high and may lead to toxicity. The recommended volume for pediatric epidural anesthesia is generally lower than this.
* **Option C:** This option is incorrect as it is too low and may not provide adequate analgesia. The volume of local anesthetic required for a sacral block is typically higher than this.
**Clinical Pearl / High-Yield Fact**
When performing pediatric epidural anesthesia, it is essential to use a weight-based dosing strategy to minimize the risk of toxicity and ensure effective analgesia.
**Correct Answer:** C. 0.5-1 mL/kg