Bioelectrical Impedance Analysis for Perioperative Fluid Evaluation in Colorectal Cancer Surgery

This study evaluates the usefulness of bioelectrical impedance analysis (BIA) for perioperative fluid evaluation and prediction of postoperative complications in oncological patients undergoing colorectal surgery. Bioelectrical impedance analysis is used to assess body fluid status and body composition before and after surgery. The study aims to determine whether perioperative BIA measurements may contribute to improved assessment of fluid balance and early identification of patients at increased risk of postoperative complications. The study is conducted at the Institute of Oncology Ljubljana in patients undergoing colorectal surgery for oncological indications.

Inclusion Criteria: * Adult patients aged 18 years or older. * Patients with oncological disease undergoing colorectal surgery at the Institute of Oncology Ljubljana. * Ability to undergo bioelectrical impedance analysis (BIA) measurements. * Signed written informed consent. Exclusion Criteria: * Patients younger than 18 years. * Patients unable to undergo BIA measurements. * Patients with conditions that, in the investigator's opinion, make participation in the study unsuitable. * Refusal to participate in the study.