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Updated: Aug 29, 2025
06:50
Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb
Published on: December 2, 2017
9.3K
Comparison of Bedside and Video-Based Capillary Refill Time Assessment in Children
Amanda J Nickel1, Ryan Brandon Hunter2, Shen Jiang3
1From the Department of Respiratory Care.
Pediatric Emergency Care
|September 9, 2022
Summary
Video-based capillary refill time (CRT) assessment in children shows moderate consistency with bedside measurements. This method also demonstrates moderate interrater and intrarater reliability, suggesting potential for improved clinical assessment of perfusion.
Area of Science:
- Pediatric critical care medicine
- Diagnostic imaging techniques
- Hemodynamic monitoring
Background:
- Capillary refill time (CRT) is a clinical indicator of peripheral perfusion.
- Assessing CRT in children with suspected shock can have poor reproducibility.
- Standardized protocols are needed to improve the reliability of CRT measurements.
Purpose of the Study:
- To compare video-based CRT (VB-CRT) with bedside CRT using a standardized protocol.
- To evaluate the interrater and intrarater consistency of VB-CRT.
- To test the hypothesis that measurement errors are low for both bedside and VB-CRT.
Main Methods:
- Ninety-nine children (aged 1-12 years) underwent 5 consecutive bedside CRT assessments.
- Assessments were video recorded on a black background.
- Ten clinicians assessed 30 randomly selected video clips twice, measuring CRT by noting compression release and capillary refill completion.
Main Results:
- Moderate agreement was found between bedside and VB-CRT (r = 0.65).
- VB-CRT was, on average, 0.17 s shorter than bedside CRT.
- Moderate consistency was observed for VB-CRT across raters (ICC = 0.61) and within raters (ICC = 0.71).
Conclusions:
- Bedside and VB-CRT assessments demonstrate moderate consistency.
- VB-CRT shows moderate reliability among different raters and for repeated measures by the same rater.
- Further research is needed to standardize and automate CRT measurements for enhanced accuracy.
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