OBJECT: In this paper, the authors' goal was to determine the utility of monitoring the abnormal muscle response (AMR) or "lateral spread" during microvascular decompression surgery for hemifacial spasm. METHODS: The authors' experience with AMR as well as the data available in the English-language literature regarding resolution or persistence of AMR and the resolution or persistence of hemifacial spasm at follow-up was pooled and subjected to a meta-analysis. RESULTS: The pooled OR revealed by the meta-analysis was 4.2 (95% CI 2.7-6.7). The chance of a cure if the AMR was abolished during surgery was 4.2 times greater than if the lateral spread persisted. CONCLUSIONS: The AMR should be monitored routinely in the operating room, and surgical decision-making in the operating room should be augmented by the AMR.
OBJECT: In this paper, the authors' goal was to determine the utility of monitoring the abnormal muscle response (AMR) or "lateral spread" during microvascular decompression surgery for hemifacial spasm. METHODS: The authors' experience with AMR as well as the data available in the English-language literature regarding resolution or persistence of AMR and the resolution or persistence of hemifacial spasm at follow-up was pooled and subjected to a meta-analysis. RESULTS: The pooled OR revealed by the meta-analysis was 4.2 (95% CI 2.7-6.7). The chance of a cure if the AMR was abolished during surgery was 4.2 times greater than if the lateral spread persisted. CONCLUSIONS: The AMR should be monitored routinely in the operating room, and surgical decision-making in the operating room should be augmented by the AMR.
Authors: M A Hughes; B F Branstetter; C T Taylor; S Fakhran; W T Delfyett; A M Frederickson; R F Sekula Journal: AJNR Am J Neuroradiol Date: 2014-11-27 Impact factor: 3.825