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Relation between finger cold-induced vasodilation and rewarming speed after cold exposure
C F Kingma1, I I Hofman1, H A M Daanen2
1Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Van der Boechorststraat 7, 1081BT, Amsterdam, The Netherlands.
European Journal of Applied Physiology
|October 18, 2018
Summary
This study found that faster rewarming speed is linked to a higher risk of cold injuries, as measured by the resistance index of frostbite (RIF). The rewarming test is easier to use than the cold-induced vasodilation (CIVD) test but has limited predictive value for cold injuries.
Area of Science:
- Physiology
- Environmental Medicine
- Sports Science
Background:
- Local cold injuries are associated with impaired cold-induced vasodilation (CIVD) and slow rewarming.
- Understanding the relationship between CIVD and rewarming speed is crucial for assessing cold injury risk.
Purpose of the Study:
- To investigate the correlation between cold-induced vasodilation (CIVD) and the speed of rewarming after cold exposure.
- To determine the predictive value of rewarming speed for local cold injuries.
Main Methods:
- Twelve participants underwent a 30-minute hand immersion in ice water to assess CIVD and a 10-minute immersion to evaluate rewarming.
- Fingertip temperatures were monitored, and the resistance index of frostbite (RIF) was calculated based on minimal temperature, mean temperature, and onset time.
- Rewarming speed was quantified using infrared imaging over 19 minutes.
Main Results:
- Onset time was the dominant factor in RIF scores, outweighing minimal and mean fingertip temperatures.
- A significant negative correlation was observed between RIF and rewarming speed (r_s = -0.60, p = 0.041).
- Faster rewarming speed was associated with a higher risk of cold injury.
Conclusions:
- The negative relationship between RIF and rewarming speed suggests that faster rewarming may indicate a higher susceptibility to cold injuries.
- While the rewarming test is user-friendly, its predictive value for cold injuries is limited as it doesn't account for vasodilation onset time.
- Further research is needed to fully understand the predictive capabilities of the rewarming test for cold injuries.
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