Which position involves lying on the back with the knees bent?

• A. Supine Position
• B. Knee-Chest Position
• C. Lithotomy Position
• D. Dorsal Recumbent Position

Answer: (D)

Lying on the back with the knees bent describes the dorsal recumbent position. In this setup, the person is on their back (face up) but with the knees flexed and the feet typically flat on the table. This knee flexion relaxes the abdominal muscles and makes it easier to access the pelvic area for examinations or procedures like catheterization. It differs from the standard supine position, where the legs are usually expected to be extended; from the lithotomy position, where the hips are flexed and the legs are raised in stirrups; and from the knee-chest position, where the person lies on the abdomen with the knees pulled toward the chest. So the described posture best matches dorsal recumbent.