## **Core Concept**
The Heimlich maneuver, also known as the abdominal thrust maneuver, is an emergency procedure used to relieve **upper airway obstruction** caused by a foreign object, such as food or another object, that is lodged in a person's airway.

## **Why the Correct Answer is Right**
The Heimlich maneuver works by applying a rapid upward thrust to the **abdominal cavity**, which helps to dislodge the obstructing object from the airway. This action increases **intrathoracic pressure** and helps to expel the object out of the airway. The maneuver involves standing behind the person with their arms wrapped around their waist and making a fist with one hand, placing it just above the person's navel. A quick upward thrust is then applied.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and does not provide any information to evaluate.
- **Option B:** This option is also blank and cannot be assessed.
- **Option C:** Similarly, this option does not provide any relevant information.
- **Option D:** This option is blank as well.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the Heimlich maneuver should be **modified for pregnant women** by applying the thrusts to the **diaphragm** rather than the abdomen to avoid exerting pressure on the uterus. Additionally, **back blows** can be used in infants and children, but the Heimlich maneuver is more effective and commonly used in adults.

## **Correct Answer:** . Abdominal obstruction/foreign body obstruction/relieving airway obstruction.