An automated quasi-continuous capillary refill timing deviceTools Blaxter, L.L., Morris, David E., Crowe, John A., Henry, C., Hill, Stephen J., Sharkey, Don, Vyas, H. and Hayes-Gill, Barrie R. (2015) An automated quasi-continuous capillary refill timing device. Physiological Measurement, 37 (1). ISSN 1361-6579 Full text not available from this repository.AbstractCapillary refill time (CRT) is a simple means of cardiovascular assessment which is widely used in clinical care. Currently, CRT is measured through manual assessment of the time taken for skin tone to return to normal colour following blanching of the skin surface. There is evidence to suggest that manually assessed CRT is subject to bias from ambient light conditions, a lack of standardisation of both blanching time and manually applied pressure, subjectiveness of return to normal colour, and variability in the manual assessment of time. We present a novel automated system for CRT measurement, incorporating three components: a non-invasive adhesive sensor incorporating a pneumatic actuator, a diffuse multi-wavelength reflectance measurement device, and a temperature sensor; a battery operated datalogger unit containing a self contained pneumatic supply; and PC based data analysis software for the extraction of refill time, patient skin surface temperature, and sensor signal quality.
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