Getting Ready
A rectal thermometer measures internal body temperature, providing an accurate reading especially useful for infants and young children. This method offers a reliable assessment of core body temperature, important for detecting fever. It is designed for effective use when following proper procedures.
Getting Ready
Before taking a temperature, gather all necessary items, including a digital rectal thermometer, petroleum jelly or a water-soluble lubricant, and alcohol wipes or mild soap and water for cleaning. Also, have a paper towel ready and, if needed, a timer. Gathering these items beforehand ensures a smooth process.
Clean the thermometer thoroughly before each use by wiping the tip with an alcohol wipe or washing it with soap and cool water. Rinse well if using soap and water, then dry completely with a clean paper towel. Apply a small amount of petroleum jelly or water-soluble lubricant to the tip of the thermometer, covering about one-half to one inch of the probe.
Position the individual comfortably. For infants, placing them on their back with legs raised towards their chest, or on their stomach across your lap, can be effective. A calm environment helps the individual remain still during the measurement.
Taking the Temperature
Gently insert the lubricated tip of the thermometer into the rectum. For infants and young children, insert the tip about one-half to one inch, or until the silver tip is no longer visible. Never force the thermometer; stop if you encounter resistance.
Hold the thermometer firmly but gently, keeping your hand cupped around the individual’s buttocks to prevent movement. Maintain this position while the thermometer takes the reading. Digital rectal thermometers beep or indicate when measurement is complete, typically within 10 to 30 seconds.
Keep the individual as still as possible to prevent injury. Do not release your grip on the thermometer until the reading is complete. Refer to the manufacturer’s instructions for duration and signal.
After Measurement and What it Means
Once the thermometer signals completion, carefully remove it from the rectum. Clean the thermometer using an alcohol wipe or by washing it with soap and cool water. Ensure it is dry before storing it in its protective case.
A normal rectal temperature ranges from 97.9°F to 100.4°F (36.6°C to 38°C). A rectal temperature of 100.4°F (38°C) or higher is considered a fever.
Seek medical attention if an infant younger than three months has a rectal temperature of 100.4°F (38°C) or higher. For older children, consult a healthcare provider if the fever is accompanied by symptoms such as extreme fussiness, difficulty breathing, or a rash. Consider the individual’s overall condition and any accompanying symptoms.