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Electrodiagnosis in GBS

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Electrodiagnosis in Guillain-Barre syndrome (GBS) involves the use of nerve conduction studies and electromyography to assess the function of the peripheral nerves and muscles.

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Electrodiagnosis in GBS PPT Summary

  1. Early diagnosis of GBS is challenging as certain changes may not be evident within the first week.
  2. Electrodiagnosis plays a crucial role in the diagnosis of GBS, with characteristic findings including absent H response, abnormal F wave, and abnormal upper extremity SNAP.
  3. The H reflex is the most sensitive test for early GBS diagnosis.
  4. Electrodiagnostic criteria, such as those proposed by Albers et al. (1989), Hadden et al. (1998), and Feasby et al. (1993), can aid in the diagnosis of GBS.
  5. Reduced compound muscle action potential (CMAP) amplitude to less than 10% of the lower limit of normal is a powerful predictor of poor outcome in GBS.


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