Final answer:
The left lateral position is optimal for obtaining a rectal temperature, as it allows for accurate measurement and comfort for the patient.
Step-by-step explanation:
The left lateral position is the best position to put a patient in to obtain a rectal temperature. This position involves the patient lying on their left side with their right knee bent towards the chest, which helps expose the rectum for easier access. Not only does this position allow for more accurate temperature measurement, but it can also be more comfortable for the patient. The left lateral position is commonly used in medical settings, especially when dealing with infants or patients with physical limitations that prevent them from assuming other positions. It's important to maintain the patient's privacy and comfort throughout the procedure, using gentle technique and proper equipment.