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Effects of cycled lighting on heart ...

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Effects of cycled lighting on heart rate, oxygenation, and weight gain in preterm infants.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Effects of cycled lighting on heart rate, oxygenation, and weight gain in preterm infants./
Author:	Chawaphanth, Sarinthip.
Description:	178 p.
Notes:	Chairperson: Susan Blackburn.
Contained By:	Dissertation Abstracts International65-07B.
Subject:	Health Sciences, Medicine and Surgery. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3139456
ISBN:	9780496865970

Effects of cycled lighting on heart rate, oxygenation, and weight gain in preterm infants.
Chawaphanth, Sarinthip.

Effects of cycled lighting on heart rate, oxygenation, and weight gain in preterm infants. - 178 p.

Chairperson: Susan Blackburn.

Thesis (Ph.D.)--University of Washington, 2004.

Very little is known about the effects of the cycled lighting (CL) intervention on preterm infants. Although some studies recommend beneficial effects of abrupt CL intervention, potential adverse effects during and after transitions may result in stress in preterm infants. Thus, this study's purpose was to examine the effects of gradual versus abrupt changes in cycled light on the heart rate (HR), oxygen saturation (SPO2), and weight gain of preterm infants. Thirteen healthy preterm infants between 31.1 and 34.6 weeks' post conceptional age (PCA) were studied using a quasi-experimental with repeated measure design. Comparisons were made within and between groups, among HR and SPO2 across 10 different time points per variable, 120 minutes per measurement period at AM (6:30--8:30) and PM (6:30--8:30) on five days, using repeated measures ANOVAs and t-tests. No significant difference in weight gain between the groups may be due to the fact that the infants on whom data was being collected were exposed to a variety of potential sources of stress through day and nighttime that might have led to increased metabolic rates and altered weight gain. Although there were unclear advantages of the gradual CL over the abrupt CL intervention in HR, evidence suggested that gradual CL may have advantages for SPO2 levels in the infants. The gradual CL group showed statistically significant greater stability in SPO2 and HR levels over time during the transition at PM, as well as significantly higher SPO2 after the transitions and over PCA than in the abrupt CL infants. Since following habituation to either bright or dim environments, infants must learn to utilize a light environment, these results suggest that preterm infants' adaptation to the abrupt CL may be more stressful than in the gradual CL environment. Physiological stability in the gradual CL infants was suggested by lower HR and significantly higher SPO 2 over time than in the abrupt CL infants; however, the changes were within normal ranges and would not be considered clinically significant. These results were expected and were confirmed by this study. Modifications of CL environment by providing gradual CL intervention to help buffer the adverse effects of abrupt CL intervention may enhance the effectiveness of intervention to promote positive developmental outcomes in infants.

ISBN: 9780496865970Subjects--Topical Terms:

1017756
Health Sciences, Medicine and Surgery.

Effects of cycled lighting on heart rate, oxygenation, and weight gain in preterm infants.
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020 $a 9780496865970
035 $a (UMI)AAI3139456
035 $a AAI3139456
040 $a UMI $c UMI
100 1 $a Chawaphanth, Sarinthip. $3 1019222
245 1 0 $a Effects of cycled lighting on heart rate, oxygenation, and weight gain in preterm infants.
300 $a 178 p.
500 $a Chairperson: Susan Blackburn.
500 $a Source: Dissertation Abstracts International, Volume: 65-07, Section: B, page: 3379.
502 $a Thesis (Ph.D.)--University of Washington, 2004.
520 $a Very little is known about the effects of the cycled lighting (CL) intervention on preterm infants. Although some studies recommend beneficial effects of abrupt CL intervention, potential adverse effects during and after transitions may result in stress in preterm infants. Thus, this study's purpose was to examine the effects of gradual versus abrupt changes in cycled light on the heart rate (HR), oxygen saturation (SPO2), and weight gain of preterm infants. Thirteen healthy preterm infants between 31.1 and 34.6 weeks' post conceptional age (PCA) were studied using a quasi-experimental with repeated measure design. Comparisons were made within and between groups, among HR and SPO2 across 10 different time points per variable, 120 minutes per measurement period at AM (6:30--8:30) and PM (6:30--8:30) on five days, using repeated measures ANOVAs and t-tests. No significant difference in weight gain between the groups may be due to the fact that the infants on whom data was being collected were exposed to a variety of potential sources of stress through day and nighttime that might have led to increased metabolic rates and altered weight gain. Although there were unclear advantages of the gradual CL over the abrupt CL intervention in HR, evidence suggested that gradual CL may have advantages for SPO2 levels in the infants. The gradual CL group showed statistically significant greater stability in SPO2 and HR levels over time during the transition at PM, as well as significantly higher SPO2 after the transitions and over PCA than in the abrupt CL infants. Since following habituation to either bright or dim environments, infants must learn to utilize a light environment, these results suggest that preterm infants' adaptation to the abrupt CL may be more stressful than in the gradual CL environment. Physiological stability in the gradual CL infants was suggested by lower HR and significantly higher SPO 2 over time than in the abrupt CL infants; however, the changes were within normal ranges and would not be considered clinically significant. These results were expected and were confirmed by this study. Modifications of CL environment by providing gradual CL intervention to help buffer the adverse effects of abrupt CL intervention may enhance the effectiveness of intervention to promote positive developmental outcomes in infants.
590 $a School code: 0250.
650 4 $a Health Sciences, Medicine and Surgery. $3 1017756
650 4 $a Health Sciences, Nursing. $3 1017798
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791 $a Ph.D.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3139456