Morbidity and mortality associated with ventral skull base surgery: analysis of the National Surgical Quality Improvement Program

Background: Ventral skull base (VSB) surgery has associated morbidity and mortality that is poorly defined. In this study we aim to identify factors associated with adverse events in VSB surgery. Methods: We queried the database of the American College of Surgeons National Surgical Quality Improvement Program for cases of VSB surgery during the period 2005-2014. Patients with complications, readmissions, reoperations, or mortality were compared to those without adverse events. Results: Nine hundred patients were included; 253 (28.1%) had complications, underwent reoperation, were readmitted, or died. These patients were older (42.6% vs 32.8, p = 0.032) and had higher rates of congestive heart failure (CHF) (3.2% vs 0.2%, p < 0.0001), disseminated cancer (8.3% vs 4.6%, p = 0.032), and preoperative sepsis (8.7% vs 2.2%, p < 0.0001). Other comorbidities included long-term steroid use (13.4% vs 9.0%, p = 0.046) and higher rates of preoperative transfusion (2.4% vs 0%, p < 0.0001). The most common complication was bleeding (13.7%). Preoperative systemic sepsis (odds ratio [OR], 2.6; 95% confidence interval [CI], 1.0-6.6) and lower hematocrit (OR, 2.1; 95% CI, 1.4-3.4) were more likely to be associated with a complication. Those with disseminated cancer (OR, 12.0; 95% CI, 2.9-50.5) were more likely to experience 30-day mortality. Black patients had lower rates of reoperation (OR, 0.3; 95% CI, 0.1-0.8), whereas patients with CHF (OR, 12.6; 95% CI, 1.7-94.4) and hypertension (OR, 2.1; 95% CI, 1.1-4.0) had higher rates of reoperation. Predictors of extended length of stay were Hispanic ethnicity (OR, 2.2; 95% CI, 1.2-4.1) and lower hematocrit (OR, 2.3; 95% CI, 1.5-3.6). Conclusion: VSB surgery can involve significant morbidity and mortality, and thus identifying risk factors allows for better prognostication and delivery of care in these patients.