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Skin temperature response to cryotherapy.

Linda S Chesterton1, Nadine E Foster, Lesley Ross

  • 1Physiotherapy Department, Coventry University, Coventry, UK. l.s.chesterton@physio.keele.ac.uk

Archives of Physical Medicine and Rehabilitation
|April 5, 2002
PubMed
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Frozen peas effectively cooled skin to therapeutic levels, unlike gel packs. This cryotherapy method offers clinically relevant analgesia and reduced nerve conduction, making it a viable option for localized pain management.

Area of Science:

  • Physiology
  • Therapeutics
  • Cryotherapy

Background:

  • Localized skin cooling is a common therapeutic intervention.
  • Different cryotherapy modalities vary in their effectiveness.
  • Understanding the clinical relevance of skin temperature reduction is crucial for therapeutic outcomes.

Purpose of the Study:

  • To compare the localized skin-cooling effects of two cryotherapy modalities: frozen peas and a flexible frozen gel pack.
  • To evaluate the clinical relevance of the observed skin temperature changes.

Main Methods:

  • A randomized controlled trial with repeated measures was conducted in a laboratory setting.
  • Twenty volunteers (13 women, 7 men; mean age 31.3 years) participated.
  • Interventions included a flexible frozen gel pack, frozen peas, or a control applied to the anterior thigh for comparison.

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Main Results:

  • Both modality and time significantly affected skin temperature (P <.0001).
  • Frozen peas achieved the lowest mean skin temperature (10.8°C ± 2.28°C) after 20 minutes, compared to the gel pack (14.4°C ± 2.53°C) and control (26.1°C ± 1.75°C).
  • Skin temperature decreased with frozen peas over time, while the gel pack and control stabilized after 10 minutes.

Conclusions:

  • Application of frozen peas generated skin temperatures sufficient for localized skin analgesia, reduced nerve conduction velocity, and decreased metabolic enzyme activity to clinically relevant levels.
  • Flexible frozen gel packs did not provide adequate skin cooling to reach these therapeutic thresholds.
  • Frozen peas represent a clinically effective cryotherapy modality for achieving therapeutic hypothermia.