Final answer:
The correct position to place a patient when obtaining a rectal temperature is lying on their side with their knees pulled towards their chest, known as the Sims' position.
Step-by-step explanation:
When obtaining a rectal temperature, the correct position for a patient is lying on their side with their knees pulled up towards their chest. This position, known as the Sims' position, allows for easier access to the rectum and ensures accurate measurement of temperature.
By placing the patient in this position, the rectal thermometer can be inserted easily and comfortably into the rectum. It is important to lubricate the thermometer to minimize any discomfort or pain for the patient. The thermometer should be inserted about one inch into the rectum and should be held in place until the reading is complete.
It's important to note that rectal thermometers are typically used in specific medical situations, such as for infants, young children, or patients who are unable to take their temperature orally. In most cases, other methods like oral or axillary (underarm) temperature measurements are preferred.