Computer analysis of environmental temperature, light and noise in intensive care: chaos or chronome nurseries?

Ardura, J; Andrés, José Onofre Montesa; Aldana, J; Revilla, M.A.; Cornelissen, Gerard; Halberg, Franz

doi:10.1016/s0306-9877(97)90203-6

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…These variables were also similar to those from healthy infants belonging to control groups of our previous reports on the subject (Ardura et al 1995(Ardura et al , 1997a.…”

Section: Case Studysupporting

confidence: 86%

Circadian Changes of Heart Rate in West Syndrome

Ardura

Andrés

Muñoz

et al. 2000

Chronobiology International

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Patterns of circadian and ultradian rhythms in the heart rate (HR) are described in a full-term baby with birth asphyxia and convulsions. A 24h HR recording was carried out at the age of 1, 15, 56, 289, and 295 days; West syndrome diagnosis was made when the patient was 3 months old. The HR showed no circadian rhythm in the follow-up, whereas it is known that the circadian rhythm appears in healthy infants at the age of 1 month and remains thereafter. This observation may be an indirect indicator of the interference of West syndrome with centers of neurological maturity.

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“…These variables were also similar to those from healthy infants belonging to control groups of our previous reports on the subject (Ardura et al 1995(Ardura et al , 1997a.…”

Section: Case Studysupporting

confidence: 86%

Circadian Changes of Heart Rate in West Syndrome

Ardura

Andrés

Muñoz

et al. 2000

Chronobiology International

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“…Daylight has its highest value at about 1 h in the afternoon (acrophase at 13.30 h), with the lowest values between 20.000 and 4.00 h. The extent of change of light intensity remains similar along the seasons and the population studied was exposed to similar environmental conditions [18]. …”

Section: Resultsmentioning

confidence: 99%

“…The circadian features, the acrophases and the extent of change are similar throughout the year and similar environmental conditions existed for the population under study in the hospital units [18]. To further define these relationships were deemed it necessary to determine the spectrum of aMT changes and its circadian characteristics in healthy newborns and children.…”

Section: Discussionmentioning

confidence: 99%

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Emergence and Evolution of the Circadian Rhythm of Melatonin in Children

Ardura

Gutierrez²,

Andrés³

et al. 2003

Horm Res Paediatr

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Objective: To assess the age at which the circadian rhythm of melatonin begins. Methods: 55 children, divided into groups from the neonatal period to 24 months of life, were studied. Urine samples were taken from 28 newborn babies to measure 6-sulfatoxymelatonin (aMT6s). Salivary samples were collected from infants (27 cases), to measure melatonin (aMT). aMT was measured by RIA and aMT6s by ELISA using commercial kits. Changes in the levels of aMT6s and aMT were evaluated using the Friedman test and Wilcoxon matched pair test. Results: The group aged 27–41 days showed statistically significant differences in daily aMT6s and aMT concentrations. The highest values were always found between 24.00 and 8.00 h. This day/night difference persisted from 2–3 to 13–24 months of age. Conclusion: The data indicate that the circadian melatonin rhythm appears at the end of the neonatal period and persists thereafter.

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“…Although room temperatures differed somewhat, all nursery rooms exhibited the same general trends in seasonal effects. Previous research has illustrated daily and weekly rhythm in NICU temperature 9. While room air temperatures themselves were generally within the recommended range of 72–76 °F, the wet bulb thermometer temperatures indicate substantial cooling due to evaporation.…”

Section: Discussionmentioning

confidence: 85%

Seasonal Mapping of NICU Temperature

Thomas

Magbalot

Shinabarger

et al. 2010

Advances in Neonatal Care

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Purpose-To create a thermal map of ambient air, radiant, and evaporative temperatures and humidity throughout the NICU nursery by season across a calendar year.Subjects-Each of the 32 bed cubicles distributed in five rooms in a Level III nursery was measured.Methods-Temperatures were recorded at a consistent time on one day during January, April, July, and October.Main outcome measures-An electronic monitor (QUESTemp° 34, Quest Technologies, Oconomowoc, WI) was used to measure dry bulb, wet bulb, and globe thermometer temperatures. Results-ANOVA revealed statistically significant (p < .000) differences in season, room, and season by room interaction. Room ambient air temperatures differed < 2 °F across season. Radiant temperature paralleled air temperature. Humidity, the predominant difference across season, produced evaporative temperatures considerably lower than room air temperature, and the gradient between mean nursery dry bulb and wet bulb temperature was 9.3 °F in summer and 16.8 °F in winter.Conclusions-The thermal map revealed seasonal thermal differences, particularly in humidity level and evaporative temperature. Room temperature alone does not reflect the total thermal environment. Recommendations include periodic assessment of nurseries including air, evaporative, and radiant temperatures as well as humidity to more fully appreciate the impact of the thermal environment on infants.

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Computer analysis of environmental temperature, light and noise in intensive care: chaos or chronome nurseries?

Cited by 6 publications

References 16 publications

Circadian Changes of Heart Rate in West Syndrome

Circadian Changes of Heart Rate in West Syndrome

Emergence and Evolution of the Circadian Rhythm of Melatonin in Children

Seasonal Mapping of NICU Temperature

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