Final answer:
The side-lying position you described is called the Sim's position. It is commonly used in healthcare settings and is achieved by specific movements. The Sim's position is used for various procedures and surgeries.
Step-by-step explanation:
The side-lying position you described, where a pillow is used to support the back and separate the lower legs, is called the Sim's position. This position is commonly used in healthcare settings, especially during procedures or examinations that require access to the rectal or vaginal areas.
The Sim's position is achieved by the following movements: moving the back of the lower legs up and back toward the buttocks, similar to kneeling, and assisting in moving the thigh diagonally upward and outward. This position is often used to relieve pressure on the lower back and promote comfort during rest or sleep.
Examples of situations where the Sim's position may be used include rectal examinations, enemas, perineal care, and during recovery from hip surgery or lower extremity surgeries.