Serum albumin nadir as marker of inflammatory response in abdominal trauma.

Background: Serum albumin levels decrease following major trauma, for various reasons. We postulated that the serum albumin nadir (SAN) level would correlate negatively with severity of physiological insult.

Methodology: This retrospective cohort study included all patients with abdominal trauma admitted to the Trauma Intensive Care Unit at Inkosi Albert Luthuli Central Hospital during 2017 and 2018.

Results: Of the 87 patients, 70 (80.5%) were male. Mean age was 32.48 years (SD 11.65; range 12-73). Blunt trauma comprised 54 patients (62.1%). Median SAN level was 23 g/L (IQR 20-27; range 10-38). Median SAN level was not different between patients with blunt versus penetrating trauma (p = 0.69), patients in whom inotropic support had been used/not used (p = 0.0502), and no different between patients on the various modes of feeding at the time of SAN (p = 0.14). However, median SAN level was lower for patients with hollow visceral injury (p = 0.004), for patients who had undergone laparotomy (p = 0.0006), for those who had received damage control surgery (p = 0.001), those who had received blood transfusions (p = 0.03), and patients who died compared to survivors (p = 0.02). Univariate regression analysis revealed negative coefficients for the following in relation to SAN level: blood transfusion (-2.77; p = 0.023), hollow viscus injury (-3.21; p = 0.008), laparotomy (-4.5; p < 0.001), damage control surgery (-3.60; p = 0.02), day of SAN (-0.39; p = 0.001), ICU length of stay (-0.12; p = 0.002), and death (-3.27; p = 0.03).

Conclusion: Greater physiological insults lead to lower levels of SAN. Serum albumin nadir level may therefore have value as a prognostic indicator in the acute trauma setting.