Meta-analysis shows dexmedetomidine lowers mean arterial pressure compared to midazolam-fentanyl in surgical patients.

This systematic review and meta-analysis included data from studies involving a total of 259 surgical patients. The analysis compared the effects of dexmedetomidine against a midazolam-fentanyl combination on intraoperative hemodynamic parameters, respiratory safety, and adverse events. Studies with fewer than three data points per group were excluded from the analysis to ensure data robustness.

The primary finding focused on mean arterial pressure (MAP). The meta-analysis demonstrated that dexmedetomidine resulted in a significantly lowered MAP compared to midazolam-fentanyl. The effect size was -6.42 mmHg, with a 95% confidence interval ranging from -8.24 to -2.21 mmHg. The result was statistically significant (p < 0.05). Secondary outcomes regarding sedative efficacy and recovery profiles were assessed descriptively but specific numerical results were not reported in the source data.

Safety and tolerability were assessed descriptively across the included studies; however, specific rates of serious adverse events, discontinuations, or detailed tolerability metrics were not reported. The analysis utilized random effects models to account for significant heterogeneity, indicated by an I-squared statistic greater than 50%.

Key limitations include the exclusion of studies with insufficient data points and the application of random effects models due to heterogeneity. Funding sources and potential conflicts of interest were not reported. Consequently, the certainty of the evidence is limited, and the direct practice relevance remains unclear based on the available data.