The Effect of Fluid Initiation Timing on Sepsis Mortality: A Meta-Analysis

Area of Science:

• Critical Care Medicine
• Sepsis Pathophysiology
• Fluid Resuscitation Strategies

Background:

• Current sepsis guidelines recommend immediate crystalloid fluid resuscitation for hypoperfusion.
• The evidence supporting these guidelines is of low quality.
• The optimal timing for initiating fluid resuscitation in sepsis remains an area of investigation.

Purpose of the Study:

• To examine the impact of fluid initiation timing on mortality in adult sepsis patients.
• To evaluate whether early fluid administration improves survival rates in sepsis-induced hypoperfusion.

Main Methods:

• A systematic review and meta-analysis of retrospective cohort studies published between 2000 and 2022.
• Studies were identified through comprehensive searches of PubMed, Scopus, Cochrane, and Google Scholar.
• Data extraction focused on mortality outcomes and confounder-adjusted odds ratios; bias was assessed using CLARITY.

Main Results:

• Five retrospective cohort studies involving 20,209 patients were included, with an in-hospital mortality rate of 21.8%.
• Pooled analysis revealed no significant impact on overall mortality for early fluid initiation (OR=0.79 [0.62-1.02]).
• However, a significant survival benefit was observed in patients with hypotension (OR=0.74 [0.61-0.90]), particularly in hospital-based studies (OR=0.78 [0.63-0.97]).

Conclusions:

• This meta-analysis supports current guideline recommendations for early fluid initiation in sepsis, especially in hypotensive patients.
• The findings are limited by the small number, heterogeneity, and retrospective nature of the included studies.
• Further retrospective research is warranted, as randomized controlled trials on fluid initiation timing are unlikely.