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Phrenic nerve conduction in leprosy.

U K Dhand1, B Kumar, R Dhand

  • 1Department of Neurology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.

International Journal of Leprosy and Other Mycobacterial Diseases : Official Organ of the International Leprosy Association
|September 1, 1988
PubMed
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This study reveals subclinical phrenic nerve involvement in leprosy patients, impacting diaphragm function. Early detection of this nerve damage in leprosy is crucial for patient management.

Area of Science:

  • Neurology
  • Infectious Diseases
  • Clinical Electrophysiology

Background:

  • Leprosy, a chronic infectious disease, can affect peripheral nerves.
  • Phrenic nerve dysfunction can lead to respiratory complications.
  • Subclinical nerve involvement in leprosy is not well-documented.

Purpose of the Study:

  • To investigate phrenic nerve conduction in leprosy patients.
  • To assess diaphragm muscle action potential in leprosy.
  • To determine the prevalence of subclinical phrenic nerve involvement in leprosy.

Main Methods:

  • Phrenic nerve conduction studies were performed bilaterally.
  • Diaphragm muscle action potentials were measured.
  • Patients included multibacillary (BL-LL) and paucibacillary (BT-TT) leprosy types.

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  • Control subjects were included for comparison.

    • Main Results:

    • Abnormal phrenic nerve conduction or reduced diaphragm potential observed in 15 leprosy patients (9 BL-LL, 6 BT-TT).
    • Bilateral phrenic nerve involvement noted in 4 BL-LL patients.
    • Median nerve conduction abnormalities co-occurred in 7 BL-LL patients with phrenic nerve issues.
    • Diaphragm movements appeared normal on fluoroscopy in all patients.

    Conclusions:

    • The study identifies subclinical phrenic nerve involvement in leprosy.
    • This finding was previously unrecognized.
    • Phrenic nerve conduction abnormalities may occur even with normal diaphragm movement on fluoroscopy.