The Safety and Efficacy of Hypertonic Saline in Achieving Primary Fascial Closure Following Damage Control Laparotomy: A Systematic Review and Meta-Analysis.

Effective fluid management is critical in patients undergoing damage control laparotomy (DCL) for trauma and sepsis. Hypertonic saline (HTS) has been proposed as an alternative to isotonic fluids to enhance primary fascial closure rates and optimize fluid balance. This systematic review and meta-analysis aims to evaluate the efficacy and safety of HTS compared to isotonic fluids in patients undergoing DCL. A comprehensive literature search was conducted across multiple databases up to the 14 of June 2024, identifying studies that compared HTS to isotonic fluids in adult patients undergoing DCL for trauma or sepsis. Eligible studies included randomized controlled trials and observational studies reporting outcomes such as early primary fascial closure (EPFC) rates, time to fascial closure, fluid requirements, electrolyte imbalances, renal function, and mortality. Data extraction and quality assessment were performed independently by two reviewers, and pooled analyses were conducted using fixed-effect models where appropriate. Four studies encompassing 375 patients met the inclusion criteria, with 100 patients receiving HTS and 275 receiving isotonic fluids. HTS administration was associated with a significantly higher EPFC rate compared to isotonic fluids (odds ratio (OR): 0.314; 95% confidence interval (CI): 0.142-0.696; p=0.004). The mean time to fascial closure was also significantly reduced in the HTS group by approximately eight hours (mean difference (MD): 8.007 hours; 95% CI: 5.558-10.596; p<0.001). Patients receiving HTS required significantly less total fluid over 48 hours (MD: 1.055 liters; 95% CI: 0.713-1.398; p<0.001). While HTS use led to higher peak sodium levels (MD: -4.318 mEq/L; 95% CI: -4.702 to -3.934; p<0.001), there were no significant differences in peak creatinine levels, need for inpatient renal replacement therapy, or 28-day mortality between the groups. HTS appears to be effective in improving EPFC rates and reducing both time to closure and overall fluid requirements in patients undergoing DCL for trauma and sepsis. Although associated with higher serum sodium levels, HTS did not increase the risk of renal dysfunction or mortality. These findings suggest that HTS is a safe and efficacious alternative to isotonic fluids in the management of critically ill patients requiring DCL. Further large-scale, randomized controlled trials are warranted to confirm these results and inform clinical guidelines.