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Updated: Jan 19, 2026

A Porcine Model of Acute Autologous Pulmonary Embolism
Published on: September 6, 2024
Successfully disposal of an acute MCA occlusion by Onyx during AVM embolism
Gang Peng1, Chen Xing Yang1, Hongwei Liu1
1Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan, China.
Abstract:
Purpose: To report a rare complication that Onyx gel blocked the MCA trunk and branches unexpectedly during AVM embolism and our strategy to rescue. Material and methods: A 16 years old otherwise healthy girl hold a left side Spetzler - Martin grade III fronto-temporal AVM, during embolization, the L-MCA and its branches were blocked by Onyx completely, the patient was transferred to the operating room to extract the Onyx gel immediately. Result: After totally 10 arterotomies, all the Onyx gel were removed. 8 hours after occlusion, all arteries were then seen to pulsate. Conclusion: Iatrogenic MCA full-length acute occlusion is a rare and severe complication during AVM embolism. Carefully identify the feeding arteries, micro-catheter angiography before Onyx gel injection and balloon-assisted embolism could probably prevent it. Surgical operation to extract onyx gel and re-canalize MCA was recommended, AVM should be resect if possible.
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