# The Role of Anesthesia in Sedation and Weaning From Mechanical Ventilation: A Systematic Review

## TL;DR

This review examines how anesthetic-based sedation affects the weaning of adult ICU patients from mechanical ventilation, finding benefits in terms of shorter weaning times and fewer complications.

## Contribution

The study provides new insights into the effectiveness of anesthetic agents like dexmedetomidine and methadone in improving mechanical ventilation weaning outcomes.

## Key findings

- Dexmedetomidine reduced weaning time and symptoms like anxiety and delirium compared to traditional sedation.
- Sequential sedation from midazolam to dexmedetomidine improved clinical outcomes.
- Enteral methadone significantly reduced weaning duration compared to fentanyl.

## Abstract

Mechanical ventilation is a critical component of care in ICUs, yet its prolonged use can result in significant complications. Effective sedation strategies play a pivotal role in facilitating the discontinuation of mechanical ventilation and minimizing associated adverse outcomes. This systematic review evaluates the impact of anesthetic-based sedation methods on optimizing the process of weaning adult patients from mechanical ventilation in intensive care settings. A comprehensive literature search was conducted across major databases, including PubMed, Web of Science, Scopus, the Virtual Health Library, and Cochrane CENTRAL, up to March 10, 2024, following established systematic review guidelines. Eligible studies included randomized controlled trials and observational research comparing anesthetic agents with conventional sedation techniques, with outcomes such as weaning duration, extubation success, length of stay in the ICU, incidence of delirium, sedation quality, adverse events, and mortality. Study quality was assessed using a validated methodological checklist. Out of 1,649 records screened, five studies met the inclusion criteria. Results indicated that dexmedetomidine was associated with shorter weaning times and reduced anxiety, agitation, and delirium compared to traditional sedation. Sequential sedation protocols, particularly transitions from midazolam to dexmedetomidine, yielded improved clinical outcomes, while enteral methadone significantly reduced weaning duration compared to fentanyl. Despite higher daily costs, anesthetic agents demonstrated favorable economic outcomes due to shorter intensive care stays. These findings suggest that targeted anesthetic sedation strategies may enhance the weaning process and improve overall patient outcomes, underscoring the need for further large-scale studies to validate and standardize these approaches.