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Related Experiment Videos

Reflex sympathetic dystrophy (algoneurodystrophy): temperature studies in the upper limb.

E D Cooke1, E N Glick, S A Bowcock

  • 1Department of Medical Electronics, St Bartholomew's Hospital, London.

British Journal of Rheumatology
|October 1, 1989
PubMed
Summary
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The thermal stress test objectively assesses reflex sympathetic dystrophy (RSD) and chronic upper limb pain (CULP). This non-invasive test reveals thermoregulatory abnormalities in patients, aiding diagnosis.

Area of Science:

  • Physiology
  • Neurology
  • Pain Management

Background:

  • Reflex sympathetic dystrophy (RSD) and chronic upper limb pain (CULP) present diagnostic challenges.
  • Objective assessment methods for thermoregulatory function in these conditions are needed.

Purpose of the Study:

  • To evaluate the utility of a thermal stress test in assessing patients with suspected RSD and CULP.
  • To compare the thermoregulatory response to cold stress between normal subjects and patients.

Main Methods:

  • A mild cold stress test (20°C for one minute) was administered to 20 normal subjects, 20 RSD patients, and 10 CULP patients.
  • Eleven variables from the hand's temperature response were measured and compared to normal ranges.
  • Thermoregulatory abnormality was defined as four or more abnormal variables.

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Main Results:

  • Both RSD and CULP groups showed significantly different temperature responses compared to normal subjects (p < 0.05).
  • However, the RSD and CULP groups were indistinguishable from each other based on the test results.
  • Ten RSD patients and seven CULP patients exhibited thermoregulatory abnormalities.

Conclusions:

  • The thermal stress test is a valuable, non-invasive tool for the objective assessment of reflex sympathetic dystrophy.
  • The test demonstrates reproducible results and is well-accepted by patients.
  • It effectively identifies thermoregulatory abnormalities associated with RSD and CULP.