Low temperature increases capillary blood refill time following mechanical fingertip compression of healthy volunteers: prospective cohort study

Low temperature increases capillary blood refill time following mechanical fingertip compression... Capillary refill time has been accepted as a method to manually assess a patient’s peripheral blood perfusion. Recently, temperature has been reported to affect capillary refill time and therefore temperature may interfere with accurate bedside peripheral blood perfusion evaluation. We applied a new method of analysis that uses standard hospital pulse oximetry equip- ment and measured blood refill time in order to test whether lowered fingertip temperature alters peripheral blood perfusion. Thirty adult healthy volunteers of differing races (skin colors) and age (young: 18–49 years and old: ≥ 50 years) groups were recruited. We created a high fidelity mechanical device to compress and release the fingertip and measure changes in blood volume using infrared light (940 nm). Capillary refill times were measured at the fingertip at three different temperature set- tings: ROOM TEMPERATURE, COLD by 15 °C cold water, and REWARM by 38 °C warm water. The COLD group has decreased fingertip temperature (23.6 ± 3.6 °C) and increased blood refill time (4.67 s [95% CI 3.57–5.76], p < 0.001). This was significantly longer than ROOM TEMPERATURE (1.96 [1.60–2.33]) and REWARM (1.96 [1.73–2.19]). Blood refill time in older subjects tended to be longer than in younger subjects (2.28 [1.61–2.94] vs. 1.65 [1.36–1.95], p = 0.077). There http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Clinical Monitoring and Computing Springer Journals

Low temperature increases capillary blood refill time following mechanical fingertip compression of healthy volunteers: prospective cohort study

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media B.V., part of Springer Nature
Subject
Medicine & Public Health; Anesthesiology; Intensive / Critical Care Medicine; Statistics for Life Sciences, Medicine, Health Sciences
ISSN
1387-1307
eISSN
1573-2614
D.O.I.
10.1007/s10877-018-0159-7
Publisher site
See Article on Publisher Site

Abstract

Capillary refill time has been accepted as a method to manually assess a patient’s peripheral blood perfusion. Recently, temperature has been reported to affect capillary refill time and therefore temperature may interfere with accurate bedside peripheral blood perfusion evaluation. We applied a new method of analysis that uses standard hospital pulse oximetry equip- ment and measured blood refill time in order to test whether lowered fingertip temperature alters peripheral blood perfusion. Thirty adult healthy volunteers of differing races (skin colors) and age (young: 18–49 years and old: ≥ 50 years) groups were recruited. We created a high fidelity mechanical device to compress and release the fingertip and measure changes in blood volume using infrared light (940 nm). Capillary refill times were measured at the fingertip at three different temperature set- tings: ROOM TEMPERATURE, COLD by 15 °C cold water, and REWARM by 38 °C warm water. The COLD group has decreased fingertip temperature (23.6 ± 3.6 °C) and increased blood refill time (4.67 s [95% CI 3.57–5.76], p < 0.001). This was significantly longer than ROOM TEMPERATURE (1.96 [1.60–2.33]) and REWARM (1.96 [1.73–2.19]). Blood refill time in older subjects tended to be longer than in younger subjects (2.28 [1.61–2.94] vs. 1.65 [1.36–1.95], p = 0.077). There

Journal

Journal of Clinical Monitoring and ComputingSpringer Journals

Published: May 30, 2018

References

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