Reference ranges are as follows: platelet count, 150,000 to 450,000 per
cubic millimeter; prothrombin time, 12.3 to 14.9 seconds; activated
partial-thromboplastin time, 25.4 to 34.9 seconds; fibrinogen, 175 to
450 mg per deciliter.
Scores on the National Institutes
of Health Stroke Scale (NIHSS) range from 0 to 42, with higher numbers
indicating more severe stroke.