Premium
Reflectance spectroscopy: to shed new light on the capillary refill test
Author(s) -
John Rani Toll,
Henricson Joakim,
Nilsson Gert E,
Wilhelms Daniel,
Anderson Chris D.
Publication year - 2018
Publication title -
journal of biophotonics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 66
eISSN - 1864-0648
pISSN - 1864-063X
DOI - 10.1002/jbio.201700043
Subject(s) - capillary refill , quantitative assessment , biomedical engineering , reflectivity , blanching , capillary action , materials science , chemistry , medicine , optics , food science , composite material , risk analysis (engineering) , physics , blood pressure
To use Bioengineering methodology is used to achieve, at five anatomical sites, a detailed, quantitative assessment of the return of blood content to the blanched area, during the Capillary Refill (CR) test. An observational, non‐randomized, experimental study on 23 healthy subjects (14 females) was performed in our climate controlled skin physiology laboratory. Our main outcome measures were based on the chronological assessment and quantification of red blood cell concentration (RBC) after the release of blanching pressure in the CR test, using Tissue Viability Imaging (TiVi), a digital photographic technique based on polarisation spectroscopy. TiVi enabled collection of detailed data on skin RBC concentration during the CR test. The results were shown as curves with skin blood concentration (TiVi‐value) on the y‐axis and the time on the x‐axis. Quantitative CR responses showed site and temperature variability. We also suggest possible objective endpoint values from the capillary refill curve. Detailed data on skin RBC concentration during the CR test is easily obtained and allows objective determination of end points not possible to achieve by naked eye assessment. These findings have the potential to place the utility of the CR test in a clinical setting in a new light. Picture : Regular photograph and TiVi Image showing CR test and corresponding graph for the CR response.