Researchers from Oregon Health and Science University examined the data of 381 adults who underwent a CT exam after presenting with a seizure. They classified these cases as "nonindex" seizures because each of the patients had a known seizure disorder.
Results from the CT exams led clinicians to change the management plan for 11 patients (3%) -- and only eight patients (2%) after excluding false positives. Relevant findings on the CT exams were associated with three clinical factors: acute head trauma, prolonged alteration of consciousness, and a focal neurologic examination at presentation. The clinicians did not change the management plan for any of the patients who did not meet these factors.
Basing the decision to perform a CT exam on these clinical factors for adults presenting with nonindex seizures may decrease unnecessary imaging with minimal loss of yield, the authors concluded.
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