Rectal temperature is a precise indicator of body temperature.
The best way to gauge a client's body temperature depends on their developmental stage, cognitive ability, level of consciousness, health, safety, and agency/unit policy. The healthcare provider decides on the ideal approach after taking the client's health and illness state, as well as factors including client safety, accuracy, and minimal invasiveness. Invasive methods using pulmonary artery catheters are the most precise way to assess core body temperature. This is only carried out in a critical care setting when ongoing measurements and other life-saving procedures are necessary.
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