In which position is the patient lying on their right or left side?

The lateral recumbent position refers to the patient lying on either their right or left side. This position is often used in emergency situations and during examinations because it can help maintain clear airways, especially for patients who are unconscious or semi-conscious. Additionally, lying on the side can help reduce the risk of aspiration if the patient vomits, as gravity will help keep any fluids away from the trachea. This position is frequently used in first aid and emergency care settings to provide comfort and stability to the patient while maintaining safety.

In contrast, the supine position involves lying flat on the back, the prone position requires the patient to lie flat on their stomach, and the semi-Fowler's position consists of the patient sitting at a 30 to 45-degree angle. These positions serve different purposes and are used based on the specific needs of the patient, which is why they do not fit the description of lying on the side.