Which lab studies are indicated in the workup of third cranial nerve palsy (oculomotor cranial nerve palsy)?

Updated: Oct 08, 2018
  • Author: James Goodwin, MD; Chief Editor: Andrew G Lee, MD  more...
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Answer

Blood glucose and hemoglobin A1c measurements can help determine if the patient is diabetic and, if so, how well-controlled the diabetes is. The presence of vasculopathic risk factors supports, but does not confirm, microvascular ischemia as a cause of oculomotor palsy. Although microvascular ischemia is the most common cause of isolated cranial nerve palsy in patients with vasculopathic risk factors (eg, diabetes, hypertension, hypercholesterolemia, smoking), a considerable number of patients have other causes. In addition, many patients with other causes of oculomotor palsy have vasculopathic risk factors. [29] Evaluation for giant cell arteritis (eg, erythrocyte sedimentation rate, C-reactive protein, temporal artery biopsy) may be helpful in elderly patients.


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