Physiological stress level and screening for malnutrition as preoperative predictors of postoperative complications in pancreatic surgery: A retrospective study

Author:

Kryvoruchko Igor A.1,Staikov Plamen2,Boyko Valeriy V.3,Sartelli Massimo4,Ivanova Yulia V.1,Honcharov Andrij1,Gramatiuk Svetlana4,Sargsyan Karine5

Affiliation:

1. Kharkiv National Medical University

2. Krankenhaus Sachsenhausen

3. Institute General and Emergency Surgery named after V.T. Zaitcev of the National Academy of Medical Sciences of Ukraine

4. Ukraine Association of Biobank

5. Medical University of Graz

Abstract

Abstract Background Assessment of ‘physiological stress levels’ and ‘nutritional status’ before surgery is important for predicting complications and indirect interventions on the pancreas. The aim of this study was to determine neutrophil-lymphocyte ratio (NLR) and nutritional risk index (NRI) indicators before surgery to predict 90-day complications and mortality in a cohort of patients with complicated chronic pancreatitis and cancer of the head of the pancreas. Methods We evaluated preoperative levels of NLR and NRI among 225 subjects treated at different centres located in three countries. Short-term outcomes included length of hospital stay, postoperative complications, and mortality at 90 days and were appreciated based on NLR and NRI. The level of physiological stress was divided according by the formulas: neutrophil-lymphocyte ratio (NLR) = (neutrophil count, %)/(lymphocyte count, %). The nutritional state of the patients was divided according to the INR: NRI = (1.519 x serum albumin, g/L) + (41.7 x present weight, kg / usual weight, kg)] Results All patients were operated. An analysis of the operations performed in three institutions demonstrated mortality in chronic pancreatitis and pancreatic pseudocysts in 1.4 %, in chronic pancreatitis and the presence of an inflammatory mass mainly in the pancreatic head in 1.2 %, and in cancer of the pancreatic head in 5.9 %. The mean preoperative NLR was normal in 33.8% of the patients, the mild physiologic stress level was 54.7%, and the moderate was 11.5% before surgery. 10.2% of patients had a normal nutritional status, 20% had mild, 19.6% had moderate, and 50.2% had severe malnutrition. In a univariate analysis, at the cutoff of NLR³9.5 (AUC=0.803) and the cutoff of NRI≤98.5 (AUC=0.801), increasing the risk of complications was observed (hazard ratio, 2.01; 95% CI, 1.247-3.250, p=0.006), but at the cutoff of NRI≤83.55 (AUC=0.81), we observed a survival difference in operated patients (hazard ratio, 2.15; 95% CI, 1.334-3.477, p=0.0025). Conclusions Our study demonstrated that NLR and NRI were predictors of postoperative complications, but only NRI was a predictor of 90-day mortality in patients after surgery.

Publisher

Research Square Platform LLC

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