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Related Experiment Videos

Capillary refilling time in newborn babies: normal values

K S Strozik1, C H Pieper, J Roller

  • 1Department of Paediatrics and Child Health, Tygerberg Hospital, University of Stellebhosch, South Africa.

Archives of Disease in Childhood. Fetal and Neonatal Edition
|May 1, 1997
PubMed
Summary
This summary is machine-generated.

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Capillary refilling time (CRT) in newborns is typically under 3 seconds. Factors like nursery containers and phototherapy showed minor effects on CRT, with chest and head measurements being most reliable.

Area of Science:

  • Neonatal physiology
  • Clinical assessment

Background:

  • Capillary refilling time (CRT) is a clinical indicator of peripheral circulation.
  • Establishing normal CRT values in neonates is crucial for assessing hydration and perfusion.

Purpose of the Study:

  • To determine normal capillary refilling time (CRT) values in healthy newborns.
  • To evaluate the influence of environmental factors (nursery containers, phototherapy) and demographic variables (birthweight, gestational age, sex) on neonatal CRT.
  • To compare CRT measurements across different body sites and between observers.

Main Methods:

  • A study involving 469 healthy neonates was conducted within 1-7 days of birth.
  • CRT was measured using a manual stopwatch with a 5-second pressure application at the chest, head, palm, and heel.

Related Experiment Videos

  • Neonates were assessed in various nursery environments, including incubators, radiant warmers, and cribs, with and without phototherapy.

    • Main Results:

    • Normal CRT values for the chest ranged from 1.82 to 2.01 seconds, and for the head from 1.59 to 1.83 seconds.
    • While significant differences in CRT were observed based on nursery containers, phototherapy use, and observer variability, these variations were not clinically significant.
    • No significant differences in CRT were found related to sex, birthweight, gestational age, or size for gestational age.

    Conclusions:

    • The upper limit of normal for neonatal CRT is established at 3 seconds.
    • Chest and head CRT measurements demonstrated the most consistency.
    • Environmental factors and observer differences impact CRT, but not to a clinically significant degree in healthy neonates.