Which of the following is CA for Bag and mask ventillation –
**Core Concept**
Bag and mask ventilation is a life-saving technique used to provide oxygen to a patient who is not breathing or is having difficulty breathing. The correct airway pressure and flow rate are crucial to maintain lung inflation and prevent complications.
**Why the Correct Answer is Right**
The correct answer is **C. 20-25 cm H2O**. The pressure required for bag and mask ventilation is typically set between 20-25 cm H2O to maintain adequate lung inflation. This pressure range helps to prevent over-inflation of the lungs, which can lead to complications such as pneumothorax. The pressure is usually set using a bag-valve-mask (BVM) device, which also provides a flow rate of 8-10 L/min.
**Why Each Wrong Option is Incorrect**
* **Option A:** 5-10 cm H2O is too low to provide adequate lung inflation, leading to inadequate oxygenation and potential respiratory acidosis.
* **Option B:** 40-50 cm H2O is too high, increasing the risk of over-inflation and pneumothorax.
**Clinical Pearl / High-Yield Fact**
When performing bag and mask ventilation, it's essential to maintain a seal around the mask to prevent air leaks and ensure effective lung inflation. A good seal can be achieved by using a properly fitted mask and ensuring the patient's head is in a neutral position.
**Correct Answer:** C. 20-25 cm H2O