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The use of thermal imaging in assessing skin temperature following cryotherapy: a review
Authors:Joseph T Costello  Ciarán D McInerney  Chris M Bleakley  James Selfe  Alan E Donnelly
Institution:1. Centre for Physical Activity and Health Research, Department of Physical Education and Sports Sciences, University of Limerick, Limerick, Ireland;2. Health and Rehabilitation Sciences Research Institute, Faculty of Life and Health Sciences, University of Ulster, Newtownabbey, County Antrim, Northern Ireland;3. Allied Health Professions Research Unit, School of Sport Tourism and the Outdoors, University of Central Lancashire, UK
Abstract:

Background

Cryotherapy is used in various clinical and sporting settings to reduce odema, decrease nerve conduction velocity, decrease tissue metabolism and to facilitate recovery after exercise induced muscle damage. The basic premise of cryotherapy is to cool tissue temperature and various modalities of cryotherapy such as whole body cryotherapy, cold spray, cryotherapy cuffs, frozen peas, cold water immersion, ice, and cold packs are currently being used to achieve this. However, despite its widespread use, little is known regarding the effectiveness of different cryotherapy modalities to reduce skin temperature.

Objectives

To provide a synopsis of the use of thermal imaging as a method of assessing skin temperature following cryotherapy and to report the magnitude of skin temperature reductions associated with various modalities of cooling.

Design

Structured narrative review.

Methods

Three electronic databases were searched using keywords and MESH headings related to the use of thermal imaging in the assessment of skin temperature following cryotherapy. A hand-search of reference lists and relevant journals and text books complemented the electronic search.

Summary

Nineteen studies met the inclusion criteria. A skin temperature reduction of 5–15 °C, in accordance with the recent PRICE (Protection, Rest, Ice, Compression and Elevation) guidelines, were achieved using cold air, ice massage, crushed ice, cryotherapy cuffs, ice pack, and cold water immersion. There is evidence supporting the use and effectiveness of thermal imaging in order to access skin temperature following the application of cryotherapy.

Conclusions

Thermal imaging is a safe and non-invasive method of collecting skin temperature. Although further research is required, in terms of structuring specific guidelines and protocols, thermal imaging appears to be an accurate and reliable method of collecting skin temperature data following cryotherapy. Currently there is ambiguity regarding the optimal skin temperature reductions in a medical or sporting setting. However, this review highlights the ability of several different modalities of cryotherapy to reduce skin temperature.
Keywords:PRICE  Tissue temperature  Cooling  Infrared technology
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