firstaidkit
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for infants, rectal measurement is best. using external ear measurment can be traumatic.
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| luckiest
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rectal measurement >accurate
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| vermdocamit
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Rectal--- Reason
Core temperature is more important in newborns than peripheral because Autonomic Nervous system is not well developed.
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| jamilisr
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is it safe to take the first measurment rectally?As i know it is unsafe..fear of unperforated rectum.Any ideas?
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| chemamr
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Rectal is the best for newborns.
(Itīs safe too, you just introduce the silvery part. If you introduce all the thermometer to help the baby to defecate, you can perforate the rectum (some mothers do) 
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| drvic
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mostly rectal temperature is used for sick babies where peripheral temperature is not reliable (e.g. shock states, systemic hypoperfusion or early stages of shock where the core to peripheral difference in temperature is significant).
i fully agree with the concern voiced by jamilisr - its not safe to take rectal temperature routinely in all normal babies - the risk benefit ratio does not match up. plus the suggestion to just introduce the silvery part is even more troublesome...the recommendations are : term newborn you can go upto a max of 3cm inside, for preterms only upto 2cm at the max for taking rectal temperatures.
in addition, the axillary temperature is taken for a period of 4 minutes in newborns and rectal temp for 3 minutes.
in addition, most newborns in the NICU are in radiant warmers (maybe incubators for some very pretem babies) with servo control mode of temerature control, so until and unless your baby is grossly in shock or hypoperfused and you haven't been monitoring the baby properly, you won't need temp monitoring regularly with thermometers.. most radiant warmers have two probes, one for core temp and the other for periph temp. so if the difference between the two also exceeds the set limit, the alarm goes off. otherwise also the alarm goes off in the radiant warmer as soon as there is a slightest of deviation from the thermoneutral temp that you've set for the baby.
believe me guys...i'm working in the NICU these days.
regards
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| chemamr
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 nice explanation drvic, you know about it.
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| nightflight1945
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Rectal is the best and most accurate.
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| drvic
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this is from the World Health Organisation: read the paragraph towards the end about measurement of temperature
http://www.who.int/reproductive-health/publicatio...
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| dr.vasim
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gr8 WORK drvic. Nice goin with u... keep it up !
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| alenka
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in the kaplan lectures they say that it's not safe to take a temperature of a NEWBORN rectally-if the baby has an unperforated anus-you can do a bad job there with your termometer.
don't know about INFANTS-probably rectal t is the way to go....
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