Rectal temperature is commonly taken in which position?

• A. Prone position
• B. Supine position
• C. Sim's position
• D. Fowler's position

Answer: (C)

Rectal temperature is taken in Sim's position because this posture exposes the rectal area while keeping the patient on their side, which helps relax the anal muscles and provides a stable, comfortable access point for inserting the thermometer. In Sim's position, the patient lies on the left side with the upper knee bent toward the chest, which straightens the anal canal and reduces movement. This makes the measurement safer, more comfortable, and less prone to contamination. Other positions—prone, supine, or Fowler's—make access to the rectum more awkward and less secure, so they’re not typically used for this measurement.