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KMID : 1040020100010010021
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International Journal of Pain
2010 Volume.1 No. 1 p.21 ~ p.28
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The Diagnostic Values of the Thermography and the Autonomic Function Test in Complex Regional Pain Syndrome
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Kim Jae-Hun
Lee Kyung-Ku
Park Soo-Young
Sim Sung-Eun
Kim Yong-Chul
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Abstract
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Background: Complex regional pain syndrome (CRPS) is diagnosed by careful patient history taking, clinical examination and supporting laboratory findings. Commonly used supporting tests are thermography and autonomic function test. However, to our knowledge, there is no investigation of ’positive results in both thermography and autonomic function test’ and ’positive results in thermography or autonomic function test’ in CRPS patients. Therefore, we investigated diagnostic values of these tests in the diagnosis of CRPS.
Methods: 53 patients with thermograph imaging and autonomic function test results (from July 2009 to April 2010) were enrolled. Cut off values of temperature difference in thermography were 0.6, 0.8 and 1.0oC. Sensitivity, specificity, positive predictive value, negative predictive value and accuracy of the tests were evaluated
Results: There were 35 CRPS patients and 18 non-CRPS patients. In the autonomic function test, sensitivity was 0.46 and specifi city was 0.50. ‘The temperature difference of over 0.8oC or autonomic function test’ had the highest score in positive predictive value, negative predictive value and accuracy. There was no statistical correlation between sympathetic function test results and temperature differences.
Conclusions: No specific test is available for CRPS, but several supporting tests are useful in making the diagnosis. If a clinician understands the quality of the supporting tests, CRPS can be evaluated and diagnosed precisely.
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KEYWORD
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autonomic function test, complex regional pain syndrome, CRPS, diagnosis, thermography
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