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Balanced crystalloid solutions reduce mortality and acute kidney injury in adult patients with sepsisBalanced crystalloid solutions show lower death rates in sepsis patients

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Key Takeaway
Consider using balanced crystalloid solutions instead of normal saline to reduce mortality and AKI in patients with sepsis.

This meta-analysis evaluated the efficacy of balanced crystalloid solutions compared to normal saline for fluid resuscitation in adult patients with sepsis. The analysis included 7 trials involving a total of 8,173 patients (4,056 receiving balanced solutions and 4,117 receiving saline).

The primary finding was a lower mortality rate with balanced solutions (RR 0.92; 95% CI 0.86-0.98; P = 0.01) in the primary analysis, with consistent results in sensitivity analysis (RR 0.91; 95% CI 0.85-0.97). Additionally, balanced solutions were associated with a lower incidence of acute kidney injury (RR 0.86; 95% CI 0.78-0.96; P = 0.004) and hyperchloremia (RR 0.68; 95% CI 0.52-0.90; P = 0.007). The study also reported a lower requirement for renal replacement therapy (RR 0.74; 95% CI 0.56-1.00; P = 0.05) and more ICU-free, ventilator-free, and vasopressor-free days (P < 0.05).

A limitation noted by the authors was the inclusion of one post-hoc observational study in the sensitivity analysis. The evidence for reduced mortality is characterized as having moderate certainty. These findings support the preferential use of balanced crystalloids over saline during fluid resuscitation for adult patients with sepsis.

How this fits prior evidence

This meta-analysis addresses a gap in managing acute complications of sepsis by comparing fluid types. While prior coverage noted that elevated syndecan-1 levels correlate with severity and poor outcomes, this study provides evidence on a specific intervention to improve survival and reduce organ injury. The findings regarding reduced mortality (RR 0.92) and lower incidence of hyperchloremia (RR 0.68) offer a clear clinical preference for balanced crystalloids over normal saline in the management of sepsis.

When a patient develops sepsis, their body faces a life-threatening infection that can lead to organ failure. Doctors must act fast, often using intravenous fluids to stabilize the patient. This study looked at how different types of fluids affect outcomes for over 8,000 adults with sepsis.

The researchers compared balanced crystalloid solutions to normal saline. They found that patients who received balanced solutions had a lower mortality rate and were less likely to develop acute kidney injury. These patients also had fewer instances of hyperchloremia, which is a high level of chloride in the blood, and required less renal replacement therapy (a type of dialysis).

While the results show a clear benefit for using balanced fluids, it is important to note that the evidence for lower mortality has moderate certainty. The study included several trials but also one observational study in its final check. These findings suggest that balanced crystalloids are a preferred choice for fluid resuscitation in sepsis cases.

What this means for you:
Balanced crystalloid solutions may reduce death and kidney damage compared to normal saline in patients with sepsis.

Common questions

Is it safer to use balanced crystalloids than normal saline?

Yes, the study found that patients receiving balanced crystalloid solutions had a lower incidence of hyperchloremia compared to those who received normal saline. Hyperchloremia is an excess of chloride in the blood.

How does this treatment help with kidney issues?

Patients who received balanced solutions were less likely to experience acute kidney injury and had a lower requirement for renal replacement therapy, which is a form of dialysis used when kidneys are not functioning properly.

Who specifically does this finding help?

This research focuses on adult patients who have sepsis. The results suggest that balanced crystalloid solutions may be more effective than normal saline for fluid resuscitation in these specific cases.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedAug 2026
View Original Abstract ↓
BackgroundFluid resuscitation is the cornerstone of sepsis management, however, the choice between balanced crystalloid solutions and normal saline remains debated. This meta-analysis aimed to compare the efficacy of balanced solutions versus saline for fluid resuscitation in adult patients with sepsis.MethodsA systematic literature search was performed in PubMed, Embase, Scopus, and other relevant sources. Retrieved studies were rigorously screened according to predefined inclusion and exclusion criteria. Data from the included studies were extracted for analysis. The primary outcome was defined as mortality rate. Secondary outcomes included acute kidney injury (AKI), hyperchloremia, renal replacement therapy (RRT), ICU-free days, ventilator-free days, vasopressor-free days. The study protocol was registered with PROSPERO (CRD420261368142).ResultsA total of eight studies (8,173 patients; 4,056 assigned to balanced solutions, 4,117 to saline) met the inclusion criteria. In the primary analysis restricted to seven randomized controlled trials, balanced solutions were associated with significantly lower mortality than saline (RR 0.92; 95% CI 0.86–0.98; P = 0.01; I2 = 37%), and a sensitivity analysis incorporating a post-hoc observational study yielded consistent results (RR 0.91; 95% CI 0.85–0.97). Balanced solutions were also associated with lower incidences of AKI (RR 0.86; 95% CI 0.78–0.96; P = 0.004), hyperchloremia (RR 0.68; 95% CI 0.52–0.90; P = 0.007), and RRT requirement (RR 0.74; 95% CI 0.56–1.00; P = 0.05), and with a greater number of ICU-free, ventilator-free, and vasopressor-free days (all P < 0.05).ConclusionIn adult patients with sepsis, treatment with balanced crystalloid solutions for fluid resuscitation significantly reduces mortality (moderate certainty), decreases kidney-related adverse events, and better maintains electrolyte balance, thereby improving patient outcomes. These findings support the preferential use of balanced crystalloids over saline in this population.Systematic review registrationhttps://www.crd.york.ac.uk/PROSPERO/view/CRD420261368142, identifier CRD420261368142.
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