抄録
We evaluated the role of short-latency somatosensory evoked potentials (SSEP) in aneurysmal subarachnoid hemorrhage (SAH).
In this retrospective study, we investigated 102 patients recording SSEP within 24 hours of SAH, including 30 patients in Grade I, 21 in Grade II, 18 in Grade III, 13 in Grade IV and 20 in Grade V on W.F.N.S. Scale.
SSEP patterns in patients with SAH were ranked from I to V according to the central conduction time (CCT), the time between the N14 peak (recorded at C-2) and the N20 peak (recorded at the cortex) in response to median nerve stimulation on either affected or unaffected side. Outcome was determined according to Glasgow outcome scale.
The prognostic value of SSEP was statistically confirmed (p value=0.007). In particular the pessimistic prognosis was accurately predicted by poor SSEP grade, although optimistic prognoses could not necessarily be predicted by a good SSEP grade.
Successive recording of SSEP showed that the CCT in the patients with symptomatic delayed vasospasm tended to prolong even in the early period as well as the CCT prolonged with developing delayed vasospasm.
SSEP was a useful clinical indicator of aneurysmal SAH.
