Measuring a baby’s temperature accurately provides a reliable indicator of their health. For infants, especially those under six months old, the rectal method is considered the most accurate way to measure core body temperature. Pediatricians often prefer this method because the rectum is close to the body’s core, offering a consistent and reliable reading. While the process may seem daunting, using the correct tools and technique makes the procedure quick and safe. Understanding the proper steps ensures you get a precise reading for informed decisions about your baby’s care.
Gathering Supplies and Preparing the Thermometer
Gather all necessary supplies before starting the procedure to ensure the process is uninterrupted and smooth. You will need a digital thermometer specifically designated for rectal use, which often has a shorter, stubbier tip than oral thermometers. This dedicated thermometer should be clearly labeled to prevent its accidental use in the mouth later on, avoiding cross-contamination. The tip of the clean thermometer must be lubricated with a small amount of petroleum jelly or a water-soluble lubricating jelly. This lubrication helps the thermometer slide in gently and comfortably, minimizing any potential discomfort for the baby.
The Rectal Temperature Taking Procedure
Positioning the Baby
Positioning the baby correctly is the first step in ensuring a safe and successful temperature measurement. One common method is to lay the baby on their stomach across your lap, securing them by placing your palm against their lower back. Alternatively, you can place the baby face-up on a firm surface, lifting their legs toward their chest with one hand. This positioning helps to expose the anal opening and keeps the baby from moving excessively during the short procedure.
Insertion and Stability
With the baby positioned, gently separate the buttocks with one hand to expose the anus. Using your other hand, gently insert the lubricated tip of the thermometer into the anal opening. The depth of insertion is specific: for infants less than six months old, insert it no more than half an inch, or until the silver tip is no longer visible. For older infants, the insertion depth should be about half an inch to one inch. Hold the thermometer securely between your second and third fingers, keeping your hand cupped around the baby’s bottom for stability.
Taking the Reading
You must hold the thermometer in place for the entire duration of the reading, never letting go or leaving the baby unattended. Wait until the digital thermometer signals that the reading is complete, usually with a beep, which typically takes only a few seconds. If you encounter any resistance during insertion, stop immediately and do not force the thermometer. Forcing the thermometer could cause injury, so always prioritize the baby’s safety over completing the reading.
Understanding the Reading and When to Seek Help
Once the thermometer signals the reading is ready, slide it out gently and note the number displayed. The American Academy of Pediatrics (AAP) defines a fever in infants as a rectal temperature of 100.4°F (38.0°C) or higher. This specific threshold is the standard for determining a fever when measured rectally and requires prompt attention, especially in very young infants. If an infant is less than three months old and has a rectal temperature of 100.4°F or higher, contact their doctor immediately. For infants older than three months, a fever should also prompt a call to the doctor if it is accompanied by concerning symptoms like refusal to feed, unusual lethargy, or signs of discomfort. Recording the temperature and the time of the reading is helpful information to share with healthcare providers.
Post-Use Cleaning and Storage
Maintaining proper hygiene after each use is important. After removing the thermometer, clean the tip thoroughly with soap and cool water, or wipe the probe with rubbing alcohol to ensure it is fully sanitized. Avoid using hot water for cleaning, as this can potentially damage the digital thermometer. Once clean and dry, store the rectal thermometer separately from any other thermometers used for oral or axillary readings. Labeling the thermometer clearly helps prevent accidental cross-contamination.