Angela Fusaro, M.D.
- A normal WBC (less than 10), a normal diff (neutrophils less than 75%) and a normal CRP (less than 1) have a NPV of 84% for appendicitis. If all three are elevated (in a patient who you suspect could have appendicitis), there is a sensitivity of 97%.
- The most common symptoms of a posterior circulation stroke are non-specific (nausea, vomiting, headache, 'dizziness').
- CT scans are not sensitive for posterior circulation strokes, especially early on in the disease process.
- Checking for nystagmus, ocular alignment and vestibulocular reflexes can help identify an abnormality, and determine if it peripheral or central.
- Nystagmus that is horizontal, resolves when you focus on an object, and is uni-directional is BENIGN. Any other nystagmus suggests badness.