Can early postoperative parenteral nutrition have some impact on postoperative inflammatory response intensity?

Background And Aims: Enhanced recovery after surgery (ERAS) is currently the modern perioperative method of care for improvement of post-surgery patient condition and for minimising various postoperative complications. A question of some negative impact of early postoperative parenteral nutrition on postoperative inflammatory response intensity has not clear-cut answer yet. This pilot project was focused on the possible influence of early parenteral nutrition on the intensity of inflammatory postoperative response to operating trauma in surgical patients. Elected as a model of these conditions were patients with colorectal cancer undergoing major surgery.

Patients And Methods: 45 patients (of whom 39 were analysed finally) operated for cancer of the large bowel were enrolled into the clinical, prospective, randomized, blinded, and monocentric trial - reference number 201811 S09P of the Ethics committee, University Hospital Hradec Kralove, Czech Republic. Patients were divided into two subgroups according to the type of nutrition: subgroup A - supplemented only with 10% glucose for supported mineral carrier; and subgroup B - supplemented with total parenteral nutrition. Samples of blood and urine were examined immediately after surgery, and on the first, second, and fourth days postoperatively. The inflammatory reaction was monitored by the serum or/and urine concentration of neopterin, tryptophan, and kynurenine, and their urinary ratios with creatinine. The results were analysed by multivariate analysis, and p-values ≤ 0.05 were considered statistically significant.

Results: The final total of 39 patients comprised 20 from subgroup A and 19 from subgroup B. The intensity of the inflammatory response detected by the selected inflammatory markers (serum and urine concentrations of neopterin, kynurenine, tryptophan, their serum ratios, and their urinary ratios to creatinine) did not demonstrate statistically significant differences after early administration of the two alternative types of parenteral nutrition.

Conclusions: The results of the study demonstrated the same or a very similar impact on the intensity of postoperative inflammatory response, regardless of whether the patient received intravenous administration of a small simple sugar infusion or total parenteral nutrition during early postoperative care.