Objective: This study aimed to integrate findings from spinal and cranial surgeries with existing literature, emphasizing the role of Intraoperative Neurophysiological Monitoring (IONM) in improving surgical outcomes through best practices. Methodology: Multimodal IONM, including motor evoked potential (MEP), somatosensory evoked potential (SSEP), and electromyography (EMG), was utilized in surgeries at Duke University Hospitals. Challenges included a small sample size and limited access to medical records. Findings: Effectiveness of IONM: High sensitivity (97.73%), specificity (83.33%), and predictive value of multimodal IONM confirmed its role in detecting intraoperative neurological injuries and optimizing outcomes. Demographics: Analysis of 50 cases (58% male, aged 13-67 years) revealed demographic influences on surgical challenges and outcomes. IONM Alerts: A 50% reduction in MEP/SSEP amplitudes was a critical criterion, with reversible alerts accounting for 70%, emphasizing the dynamic nature of neural responses. Alert Causes \& Management: Excessive dissection was a common cause of alerts. Interventions like warm saline irrigation and surgical pauses mitigated risks. Outcome Associations: Most patients (88%) experienced no new postoperative deficits, with significant associations between alert reversibility and deficit occurrence. Statistical Insights: Predictive Value: Strong correlations were observed between alert patterns and postoperative outcomes, with SSEP/MEP alerts reliably predicting neurological deficits. Technology \& Resources: Modern devices, updated technology, and skilled staff were critical for high-quality results, highlighting the adage that "poor monitoring is worse than no monitoring." Contextual Observations: Heterogeneity of Cases: Diagnoses ranged from cervical intramedullary tumors to lumbar canal stenosis, requiring tailored interventions. EMG Utility: EMG showed stability with fewer alerts, proving beneficial in specific surgeries. Corrective Measures: Adjustments in mean arterial blood pressure and steroid use showcased adaptive intraoperative strategies. Protocol Gaps: The absence of standardized IONM alert response protocols was noted, underscoring the need for future research.
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rate of occurrence of New Postoperative Neurological Deficits
Timeframe: Evaluated within one-week post-surgery.