Other Publications (1)
Articles by Rani Toll John in JoVE
Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb Joakim Henricson1,2, Rani Toll John1,3, Chris D. Anderson4,5, Daniel Björk Wilhelms1,2 1Department of Emergency Medicine, Local Health Care Services in Central Östergötland, Region Östergötland, 2Division of Drug Research, Department of Medical and Health Sciences, Faculty of Health Sciences, Linköping University, 3Division of Neuro and Inflammation Science, Department of Clinical and Experimental Medicine, Linköping University, 4Division of Cell Biology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, 5Department of Dermatology and Venerology, Heart and Medicine Center, Region Östergötland This protocol describes how the use of diffuse polarization spectroscopy can improve the clinical usefulness of the capillary refill test. We suggest a more detailed analysis of the course of the capillary refill in healthy volunteers using diffuse reflectance spectroscopy videos and new informatic endpoints.
Other articles by Rani Toll John on PubMed
Reflectance Spectroscopy: to Shed New Light on the Capillary Refill Test Journal of Biophotonics. | Pubmed ID: 28544641 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.