Methodological investigation of measuring nasopharyngeal temperature as noninvasive brain temperature analogue in the neonate

Abstract

Tnasoph measured at a position anatomically closest to the brain reflects epidural brain temperature more closely than Trectum. When measured at nose-ear distance it is unaffected by breathing or head turning. Measuring Tnasoph within a feeding tube and standardizing the measuring position is crucial for its use as brain temperature analogue.

Premature Infants Are Less Capable of Maintaining Thermal Balance of Head and Body with Increases of Thermal Environment than with Decreases

“…14 A thin nasopharyngeal thermistor probe was inserted into the lumen of the feeding tube, such that the thermistor tip was positioned for measurement of nasopharyngeal temperature as described. 14 The lumen of the feeding tube was sealed distally to the thermistor tip and a thin silastic catheter was fitted into that distal part of the feeding tube for gavage feeding to avoid the affect of milk or gastric fluid on temperature measurements.…”

“…hypoxia. Because body core temperatures, for example head core temperature measured as nasopharyngeal temperature, 14 are closely related to brain temperature, it is reasonable to investigate the effect of a warmer environment on nasopharyngeal and rectal temperature in premature infants to determine how they would cope with intended or inadvertent changes of incubator temperature.…”

Treatment of postanesthetic shivering in children: A randomized control study comparing tramadol to pethidine

“…Measurement of nasopharyngeal temperature at this point had a high precision. Nose-ear distance was anatomically the closest to the brain base, and core temperature was recorded (Ko et al, 2001). Anaesthesia was maintained with isoflurane 0.8% volume with oxygen in air, with intermittent positive pressure ventilation in a circle system.…”

Estimating core temperature in infants and children after cardiac surgery: a comparison of six methods

“…Nasopharyngeal temperature is the method frequently used during surgery and in adult critical care (Ramsay et al. 1985, Engler & Rushton 1996, Cronin & Wallis 2000) and has been studied in the neonatal setting (Ko et al. 2001).…”

“…Recently, some neonatal studies have compared methods of temperature measurement (Sganga et al. 2000, Bailey & Rose 2001, Ko et al. 2001).…”