Bench-top comparison of thermometers used in newborn infants

Dunne, Emma; Cunningham, Katie; O’Donnell, Colm P.; McCarthy, Laura

doi:10.1136/archdischild-2020-320123

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…In total, 198 infants were randomly assigned; 99 (44 (44%) girls) to BEFORE and 99 (53 (54%) girls) to AFTER (figure 1). Their median (IQR) GA was 29 (27)(28)(29)(30)(31) vs 29 (27)(28)(29)(30)(31) weeks, and mean (SD) birth weight (BW) was 1206 (429) vs 1138 (419) g, respectively (table 1). The minimum GA and BW were 23 +1 weeks and 485 g, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The primary outcome was rectal temperature within the normal range (36.5°C–37.5°C)14 on admission to the NICU. Rectal temperature was measured on arrival to the NICU, while the infant was still in the transport incubator and in the PB, with a digital thermometer (Microlife MT-1931, Microlife AG, Widnau, Switzerland) that was validated to detect abnormal temperature in very preterm infants 29 30…”

Section: Methodsmentioning

confidence: 99%

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Polyethylene bags before cord clamping in very preterm infants: a randomised controlled trial

Dunne,

Ni Chathasaigh,

Geraghty

et al. 2024

Arch Dis Child Fetal Neonatal Ed

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ObjectiveHypothermia on admission to the neonatal intensive care unit (NICU) is associated with an increased risk of death in preterm infants. There are currently no evidence-based recommendations for thermal care before cord clamping (CC). We wished to determine whether placing very preterm infants in a polyethylene bag (PB) before CC, compared with after CC, results in more infants with a temperature in the normal range on NICU admission.DesignRandomised controlled trial.SettingTertiary maternity hospital.PatientsInborn infants<32 weeks’ gestational age (GA).InterventionsInfants were randomly assigned to have a PB placed before or after CC.Main outcomeRectal temperature within the normal range (36.5°C–37.5°C) on NICU admission.ResultsBetween July 2020 and September 2022, 198/220 (90%) eligible infants were enrolled in this study; 99 (44 (44%) girls) were randomly assigned to BEFORE and 99 (53 (54%) girls) to AFTER. Median (IQR) GA 29 (27–31) vs 29 (27–31) weeks, mean (SD) birth weight 1206 (429) vs 1138 (419) g, respectively. The proportion of infants who had normal temperature on NICU admission did not differ between the groups (BEFORE 54/99 (55%) vs AFTER 55/98 (56%), p 0.824). The proportion of infants with a temperature outside of the normal range was similar between the groups; hypothermia (BEFORE 34/99 (34%) vs AFTER 33/98 (34%), hyperthermia (BEFORE 10/99 (10%) vs AFTER 10/98 (10%)).ConclusionsPlacing a PB before CC did not increase the proportion of preterm infants with normal temperature on NICU admission. A large proportion of preterm infants had abnormal temperature. Further studies on thermoregulation before CC are needed.Trial registration numberNCT04463511

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Polyethylene bags before cord clamping in very preterm infants: a randomised controlled trial

Dunne,

Ni Chathasaigh,

Geraghty

et al. 2024

Arch Dis Child Fetal Neonatal Ed

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“…Since we chose to investigate hypothermia within the first 6 hours of life, caution needs to be taken when drawing comparisons to prior studies which have investigated hypothermia upon NICU/SCN admission as there may be other factors affecting temperatures upon NICU/SCN admission that were not captured within our data. In addition, some variability in temperatures between infants may be due to type of thermometer used [ 26 , 27 ], which was not reliably documented in our patient charts and therefore not controlled in our data. Additionally, at our hospitals, we do not have heated gases in the delivery room, and at the time of the study, we had no documentation of room temperatures for the delivery room, NICU/SCN, or well-infant nursery.…”

Section: Discussionmentioning

confidence: 99%

Factors associated with hypothermia within the first 6 hours of life in infants born at ≥340 weeks’ gestation: a multivariable analysis

et al. 2022

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Background Lack of appropriate temperature management has been associated with significant adverse outcomes in preterm and low birthweight neonates. There is a lack of similar investigations in the late preterm (340–366) and term (≥370) neonate population. Our aim was to identify key risk factors as well as clinical outcomes associated with hypothermia in this population. Methods A retrospective chart review was conducted at the Ottawa Hospital including all eligible infants ≥340 weeks’ gestation over a one-month period in November 2020. Infant, maternal, and delivery room variables were collected, including prematurity, maternal temperature, delivery mode, birthweight, and premature rupture of membranes, as well as clinical outcomes such as NICU/SCN admission and length of stay. Regression models were generated, adjusted for covariates, and stepwise regression was performed. Results Four hundred forty infants were included in the analysis; 26.8% (118/440) were hypothermic within 6 hours of delivery. In the multivariable analysis, prematurity, low 5 minute Apgar score (< 7) or need for resuscitation, maternal hypertension, and absence of premature rupture of membranes > 18 hours or suspected maternal infection were significantly associated with hypothermia within 6 hours of delivery (p < 0.05). Multivariable analysis of clinical outcomes demonstrated a significant association between hypothermia within 6 hours of delivery and NICU/SCN admission (OR = 2.87; 95% CI 1.36, 6.04), need for respiratory support or diagnosis of respiratory distress syndrome (OR = 3.94; 95% CI 1.55, 10.50), and length of stay (exp(β) = 1.20; 95% bootstrap CI 1.04, 1.37). Conclusions Our results suggest there are similar factors associated with hypothermia in our study population of infants born at ≥340 weeks’ gestation compared to prior studies in preterm and low-birthweight infants. Furthermore, hypothermia is associated with higher risk of adverse outcomes, which highlights the need to prevent hypothermia in all newborns.

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Prospective comparison of thermometers used in very preterm infants

Dunne

O’Donnell

McCarthy

2021

Arch Dis Child Fetal Neonatal Ed

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We measured temperature on admission to the neonatal unit in a cohort of 54 very preterm infants. We measured rectal temperature with a digital thermometer (Microlife MT-1931) as the gold standard (MT-R). We also measured axillary temperature with the MT (MT-A), with the Welch Allyn SureTemp Plus 692 in ‘continuous’ (WAC) mode and in the default ‘predictive’ (WAP) mode. While MT-A and WAC frequently differed from MT-R by ≥0.3°C, they were both reasonably sensitive and specific for hypothermia (MT-R <36.5°C). WAP overestimated MT-R by ≥0.5°C on 37/53 (70%) occasions and had poor sensitivity for hypothermia, identifying only 2 of 29 infants with MT-R <36.5°C as hypothermic.

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Bench-top comparison of thermometers used in newborn infants

Cited by 4 publications

References 3 publications

Polyethylene bags before cord clamping in very preterm infants: a randomised controlled trial

Polyethylene bags before cord clamping in very preterm infants: a randomised controlled trial

Factors associated with hypothermia within the first 6 hours of life in infants born at ≥340 weeks’ gestation: a multivariable analysis

Prospective comparison of thermometers used in very preterm infants

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