True about endotracheal cuff – a) Low-volume, high pressureb) Low–volume, low pressurec) High-volume, low pressured) High-volume, high pressuree) Equal-volume, pressure

**Core Concept**
The endotracheal cuff is a critical component of an endotracheal tube, designed to prevent leaks and ensure a secure airway. The cuff's volume and pressure are crucial factors in maintaining effective ventilation while minimizing complications.

**Why the Correct Answer is Right**
The correct answer is **b) Low–volume, low pressure**. This is because low-volume, low-pressure cuffs are designed to provide a secure seal without causing mucosal damage. They work by conforming to the tracheal shape, minimizing the risk of tracheal stenosis and other complications associated with high-pressure cuffs. The low volume and pressure help maintain the tracheal mucosa's integrity, reducing the risk of ischemia and subsequent complications.

**Why Each Wrong Option is Incorrect**
**Option A:** High-volume, high-pressure cuffs are associated with increased risk of tracheal damage, stenosis, and other complications. They are not the preferred choice for routine endotracheal intubation.

**Option C:** High-volume, low-pressure cuffs are less effective in providing a secure seal, particularly in pediatric patients or those with small airways. They may lead to leaks and inadequate ventilation.

**Option D:** High-volume, high-pressure cuffs are associated with increased risk of tracheal damage and complications. They are not the preferred choice for routine endotracheal intubation.

**Option E:** Equal-volume, pressure cuffs do not exist as a standard design. The term is misleading and does not accurately describe a well-known cuff type.

**Clinical Pearl / High-Yield Fact**
When selecting an endotracheal tube, consider the patient's anatomy, the type of surgery, and the potential risk of complications. Low-volume, low-pressure cuffs are generally preferred for routine endotracheal intubation.

**Correct Answer:** B. Low–volume, low pressure