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Research Article: Preoperative hypoalbuminaemia in liver surgery: an observational study at a university medical centre

Date Published: 2023-05-18

Abstract:
Objectives Preoperative hypoalbuminaemia is associated with adverse outcome, including increased postoperative mortality in cardiovascular surgery, neurosurgery, trauma and orthopaedic surgery. However, much less is known about the association between preoperative serum albumin and clinical outcomes after liver surgery. In this study, we sought to determine whether hypoalbuminaemia before partial hepatectomy is associated with a worse postoperative outcome. Design Observational study. Setting University Medical Centre in Germany. Participants We analysed 154 patients enrolled in the perioperative PHYsostigmine prophylaxis for liver resection patients at risk for DELIrium and postOperative cognitive dysfunction (PHYDELIO) trial with a preoperative serum albumin assessment. Hypoalbuminaemia was defined as serum albumin <35?g/L. Subgroups classified as hypoalbuminaemia and non-hypoalbuminaemia consisted of 32 (20.8%) and 122 (79.2%) patients, respectively. Outcome measures The outcome parameters of interest were postoperative complications according to Clavien (moderate: I, II; major: ?III), length of intensive care unit (ICU) stay, length of hospital stay and survival rates 1?year after surgery. Results Preoperative hypoalbuminaemia was associated with the occurrence of major postoperative complications (OR 3.051 (95% CI 1.197 to 7.775); p=0.019) after adjusting for age, sex, randomisation, American Society of Anesthesiologists physical status, preoperative diagnosis and Child-Pugh class. Both ICU and hospital lengths of stay were significantly prolonged in patients with preoperative hypoalbuminaemia (OR 2.573 (95% CI 1.015 to 6.524); p=0.047?and OR 1.296 (95% CI 0.254 to 3.009); p=0.012, respectively). One-year survival was comparable between patients with and without hypoalbuminaemia. Conclusions We found that low serum albumin before surgery was associated with a worse short-term outcome after partial hepatectomy, which strengthens the prognostic value of serum albumin in the setting of liver surgery. Trial registration numbers ISRCTN18978802 and EudraCT 2008-007237-47.

Introduction:
The hepatic protein albumin is acknowledged as a marker of nutritional state, inflammation, hepatic function and body water balance. 1–4 Low serum albumin concentrations occur in states of liver and renal dysfunction, sepsis and heart failure, resulting in severe ascites and coagulopathy. 1 2 5–8 Experimental studies have demonstrated that serum albumin exerts anti-inflammatory effects, while hypoproteinaemia has been related to impaired activation and increased apoptosis of macrophages. 7 9 10 Impaired immune…

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