A Pilot Study to Examine Maturation of Body Temperature Control in Preterm Infants

Knobel, Robin B.; Levy, Janet; Katz, Laurence M.; Guenther, Bob D.; Holditch‐Davis, Diane

doi:10.1111/1552-6909.12240

Cited by 16 publications

(23 citation statements)

References 22 publications

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“…In addition, we wanted to explore the use of images to visualize temperature differentials in each infant. We performed our initial assessment of the camera with infants in a pilot study and changed methods to improve imaging and thermal stability of the infant (Knobel et al, 2013). …”

Section: 2 Materials and Methodsmentioning

confidence: 99%

Body temperature in premature infants during the first week of life: Exploration using infrared thermal imaging

Dail

Holditch‐Davis

Sloane

et al. 2017

Journal of Thermal Biology

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Background Hypothermia is a problem for very premature infants after birth and leads to increased morbidity and mortality. Previously we found very premature infants exhibit abnormal thermal patterns, keeping foot temperatures warmer than abdominal temperatures for their first 12 hours of life. Purpose We explored the utility of infrared thermography as a non-invasive method for measuring body temperature in premature infants in an attempt to regionally examine differential temperatures. Results Our use of infrared imaging to measure abdominal and foot temperature for extremely premature infants in heated, humid incubators was successful and in close agreement using Bland and Altman technique with temperatures measured by skin thermistors. Conclusions Our study methods demonstrated that it was feasible to capture full body temperatures of extremely premature infants while they were resting in a heated, humid incubator using a Flir SC640 infrared camera. This technology offers researchers and clinicians a method to examine acute changes in perfusion differentials in premature infants which may lead to morbidity.

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Section: 2 Materials and Methodsmentioning

confidence: 99%

Body temperature in premature infants during the first week of life: Exploration using infrared thermal imaging

Dail

Holditch‐Davis

Sloane

et al. 2017

Journal of Thermal Biology

View full text Add to dashboard Cite

show abstract

“…(A pilot study of five infants was completed to evaluate methods prior to initiating enrollment in the larger study [Knobel, Levy, Katz, Guenther, & Holditch-Davis, 2013]. ) The three-year parent study assessed body temperature using measured thermistor skin temperatures, infrared thermal imaging (Knobel-Dail, Holditch-Davis, Sloane, Guenther, Katz, 2017), and compared foot temperature to perfusion index in the foot (Knobel-Dail, Tanaka, Holditch-Davis, & White, 2016).…”

Section: Purposementioning

confidence: 99%

Negative Temperature Differential in Preterm Infants Less Than 29 Weeks Gestational Age

et al. 2017

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Background Hypothermia is related to increased morbidity and mortality in very preterm infants; continuous temperature monitoring is necessary. Thermoregulation is limited in preterm infants. Objectives The purpose of the research was to assess describe negative temperature differential (NTD) and assess the associations of NTD with infant demographic characteristics, medical history, and clinical events. Methods An exploratory, case study design was used. Abdominal and foot temperature was measured every minute over the first two weeks of life in 22 preterm infants < 29 weeks GA. Results All infants experienced NTD. Daily NTD in all infants across all study days ranged from 0–70.7%; 2-week mean NTD over all infants ranged from 7.3–38.5%. Four infants treated for late onset of infection had a higher NTD than 18 infants without infection (M = 27.8%, SD = 9.52 vs. M = 16.4%, SD = 5.34, p < .05). Although not statistically significant, higher mean percent of NTD were noted in infants having early onset infection (24.1% vs. 16.4%), African-American race (20.0% vs. 15.3%) and/or being born to a mother who smoked during pregnancy (26.6% vs. 16.7%). Discussion A larger study is needed to examine associations between NTD and race, maternal smoking history, and infection. NTD might be used as a biomarker to guide acute clinical care and identify infants at risk for acute and chronic morbidity.

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“…Additionally, there may be a number of forces at work to produce variations seen in one empirical series, especially if the data are collected in a strictly observational manner with no experimental controls. For example, in infant studies conducted in neonatal intensive care units, minute-to-minute fluctuations in temperature may reflect a variety of internal processes as well as environmental events (Knobel, Holditch-Davis, Schwartz & Wimmer, 2009; Knobel et al, 2011). This complexity requires highly flexible statistical models.…”

Section: Basic Statistical Conceptsmentioning

confidence: 99%

“…In a study of temperature control in preterm infants ( the temperature study , Knobel et al, 2011), researchers captured abdominal and foot temperatures every minute for the first 5 days of life in a neonatal intensive care unit, hypothesizing that mature temperature control would occur when abdominal temperature remained above the foot temperature for extended periods of time. A second data set consists of measured cerebral oxygenation in full term infants every 2 seconds over 90 minutes in a neonatal intensive care unit.…”

mentioning

confidence: 99%

The Promise of the State Space Approach to Time Series Analysis for Nursing Research

2012

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Background Nursing research, particularly related to physiological development, often depends on the collection of time series data. The state space approach to time series analysis has great potential to answer exploratory questions relevant to physiological development but has not been used extensively in nursing. Objectives To introduce the state space approach to time series analysis and demonstrate potential applicability to neonatal monitoring and physiology. Method We present a set of univariate state space models; each one describing a process that generates a variable of interest over time. Each model is presented algebraically and a realization of the process is presented graphically from simulated data. This is followed by a discussion of how the model has been or may be used in two nursing projects on neonatal physiological development. Results The defining feature of the state space approach is the decomposition of the series into components that are functions of time; specifically, slowly varying level, faster varying periodic, and irregular components. State space models potentially simulate developmental processes where a phenomenon emerges and disappears before stabilizing, where the periodic component may become more regular with time, or where the developmental trajectory of a phenomenon is irregular. Discussion The ultimate contribution of this approach to nursing science will require close collaboration and cross-disciplinary education between nurses and statisticians.

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A Pilot Study to Examine Maturation of Body Temperature Control in Preterm Infants

Cited by 16 publications

References 22 publications

Body temperature in premature infants during the first week of life: Exploration using infrared thermal imaging

Body temperature in premature infants during the first week of life: Exploration using infrared thermal imaging

Negative Temperature Differential in Preterm Infants Less Than 29 Weeks Gestational Age

The Promise of the State Space Approach to Time Series Analysis for Nursing Research

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