Discharge Instructions: Taking a Rectal Temperature (Pediatric)
You take a rectal temperature by placing a thermometer in your baby’s bottom. This method provides the most accurate reading. But do this only when instructed by your baby’s doctor. Use the steps on this sheet as a guide.
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Get the Thermometer Ready
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Be sure to use a thermometer that is specifically designed for rectal use.
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Remove the cover from the thermometer.
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Wash the thermometer with warm soapy water; then rinse with clear water.
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Wipe the thermometer dry or let it air dry.
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Smear a bit of petroleum jelly or water-based lubricant on the tip.
Find a Comfortable Position for Holding Your Baby
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Put your baby on his or her back on a firm surface.
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Hold the baby’s ankles and lift both legs, as if changing a diaper.
Or
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Place your baby face down across your lap.
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Use one hand to part the baby’s buttocks.
Take the Temperature
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Follow the specific directions for using your digital thermometer.
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Gently slip the tip of the thermometer into the rectum (the opening where bowel movements leave baby’s body), no farther than ¼ to ½ inch. Never insert the tip more than ½ inch.
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Hold the thermometer in place until it beeps.
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Slide the thermometer out. Read the temperature on the digital display. Normal rectal temperature is about 97.6°F to 100.2°F.
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Before putting the thermometer away, clean it with soap and warm water.
Follow-Up
Make a follow-up appointment as directed by our staff.
When to Call Your Doctor
Call your doctor right away if your child has any of the following:
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Bleeding from the area where you took the temperature
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Fever:
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In an infant under 3 months old, a rectal temperature of 100.4°F (38.0°C) or higher
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In a child 3 to 36 months, a rectal temperature of 102°F (39.0°C) or higher
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In a child of any age who has a temperature of 103°F (39.4°C) or higher
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A fever that lasts more than 24-hours in a child under 2 years old, or for 3 days in a child 2 years or older
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Your child has had a seizure caused by the fever
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Shaking chills
