In which position is a patient if they are described as 'on their side'?

When a patient is described as "on their side," they are in the lateral position. This term specifically refers to a position where an individual is lying on their side, which can be either the left or the right side. This position is often used for various medical assessments and procedures, and it helps in promoting comfort and optimizing breathing for patients who are unable to lie flat.

In contrast, the other positions are distinct and used for different contexts. The supine position refers to lying flat on the back, which is not the position described in the question. The prone position involves a person lying flat on their stomach, which also does not align with being on the side. Sitting simply refers to an upright position with weight supported by the buttocks, which again is not what is described as "on their side." Understanding these distinctions is crucial for healthcare professionals to position patients appropriately for treatment or assessment.