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Related Experiment Videos

Thermatomal changes in cervical disc herniations.

H Y Zhang1, Y S Kim, Y E Cho

  • 1Department of Neurosurgery, Yongdong Severance Hospital, Yonsei University College of Medicine, Seoul, Korea. hyzhang@unitel.co.kr

Yonsei Medical Journal
|November 24, 1999
PubMed
Summary

Digital infrared thermographic imaging objectively detects thermal changes in cervical disc herniation (CDH). This study mapped specific thermatomal changes, aiding in diagnosing CDH levels and identifying symptomatic levels in patients.

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Area of Science:

  • Neurology
  • Medical Imaging
  • Orthopedics

Background:

  • Subjective sensations of arm temperature changes can indicate radiculopathy, including cervical disc herniation (CDH).
  • Objective confirmation of these thermal changes using thermography is possible, but precise localization in CDH remains unestablished.

Purpose of the Study:

  • To objectively map and define the specific areas of thermatomal change in patients with cervical disc herniation (CDH).
  • To establish the precise location of thermal alterations associated with different CDH levels (C3/4 to C7/T1).

Main Methods:

  • Utilized digital infrared thermographic imaging (DITI) to analyze thermal patterns in 115 CDH patients and 50 controls.
  • Employed statistical analysis (t-test) to identify significant thermal differences (delta T) and define abnormal thermatomal areas based on predefined thresholds.

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  • Correlated thermal changes with specific CDH levels (C3/4, C4/5, C5/6, C6/7, C7/T1).

    • Main Results:

    • Established normal temperature ranges for the upper trunk and extremities in controls (29.8°C–32.8°C).
    • Defined minimal abnormal thermal differences (0.1°C–0.3°C) with 99% confidence intervals.
    • Detailed specific thermatomal areas affected by thermal changes for each CDH level (C3/4 to C7/T1), noting these areas encompassed wider sensory and sympathetic dermatomes.
    • Observed statistically significant temperature changes in all CDH patients.

    Conclusions:

    • The identified areas of thermal change in CDH patients are valuable for diagnosing the level of disc protrusion.
    • Thermography can effectively detect the symptomatic level in patients with multiple CDH levels.
    • DITI provides objective data to complement clinical assessment of CDH.