Neurosurgery
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We report a case of the complete resection of a parasagittal meningioma, including an 8-cm length of the superior sagittal sinus and adjacent dura. Flow through the sagittal sinus was reestablished through an interposed saphenous vein graft. ⋯ Follow-up magnetic resonance angiography 9 months after surgery demonstrated continued patency of the graft. Sagittal sinus replacement with a vein graft can be safely performed during Simpson Grade I resection of parasagittal meningiomas.
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INTRAOPERATIVE MONITORING OF motor evoked potentials (MEPs) may become a valuable test of spinal cord function during surgery. Unfortunately, MEP responses are affected by most common anesthetics. We studied the effect of intravenous propofol on transcranial magnetic MEPs (tcMMEPs) in the rat. ⋯ Infusion tcMMEPs displayed increased onset latencies but demonstrated a significant change in amplitudes only after the largest infusion dose. The MEPs approached baseline levels after discontinuation of the propofol. This study demonstrates that tcMMEPs can be successfully recorded from the rat during propofol anesthesia.