Pre-operative fluid resuscitation in the emergency general surgery septic patient: does it really matter?

OBJECTIVE

Emergency general surgery (EGS) patients presenting with sepsis remain a challenge. The Surviving Sepsis Campaign recommends a 30 mL/kg fluid bolus in these patients, but recent studies suggest an association between large volume crystalloid resuscitation and increased mortality. The optimal amount of pre-operative fluid resuscitation prior to source control in patients with intra-abdominal sepsis is unknown. This study aims to determine if increasing volume of resuscitation prior to surgical source control is associated with worsening outcomes.

METHODS

We conducted an 8-year retrospective chart review of EGS patients undergoing surgery for abdominal sepsis within 24 h of admission. Patients in hemorrhagic shock and those with outside hospital index surgeries were excluded. We grouped patients by increasing pre-operative resuscitation volume in 10 ml/kg intervals up to > 70 ml/kg and later grouped them into < 30 ml/kg or ≥ 30 ml/kg. A relative risk regression model compared amounts of fluid administration. Mortality was the primary outcome measure. Secondary outcomes were time to operation, ventilator days, and length of stay (LOS). Groups were compared by quick Sequential Organ Failure Assessment (qSOFA) and SOFA scoring systems.

RESULTS

Of the 301 patients included, the mean age was 55, 51% were male, 257 (85%) survived to discharge. With increasing fluid per kg (< 10 to < 70 ml/kg), there was an increasing mortality per decile, 8.8% versus 31.6% (p = 0.004). Patients who received < 30 mL/kg had lower mortality (11.3 vs 21%) than those who received > 30 ml/kg (p = 0.02). These groups had median qSOFA scores (1.0 vs. 1.0, p = 0.06). There were no differences in time to operation (6.1 vs 4.9 h p = 0.11), ventilator days (1 vs 3, p = 0.08), or hospital LOS (8 vs 9 days, p = 0.57). Relative risk regression correcting for age and physiologic factors showed no significant differences in mortality between the fluid groups.

CONCLUSIONS

Greater pre-operative resuscitation volumes were initially associated with significantly higher mortality, despite similar organ failure scores. However, fluid volumes were not associated with mortality following adjustment for other physiologic factors in a regression model. The amount of pre-operative volume resuscitation was not associated with differences in time to operation, ventilator days, ICU or hospital LOS.