1. Adverse Events-AE (Occurrence of AE (Yes, No); Type of AE (To be classified and grouped by organ class and system using CTCAE v5.0 terminology); Intensity of AE (Mild, Moderate, Severe, life-threatening or incapacitating, resulting in death); Severity of AE (serious, non-serious); Duration of AE (Time elapsed between onset and termination dates of AE); Causal relationship of AE (definite, very likely, probable, possible, unrelated, unknown); Management of AE onset (no change in dose, temporary discontinuation, permanent discontinuation of study treatment); Outcome of AE (recovered/resolved, improving/resolving, persistent/unresolved, with sequelae requiring treatment, with sequelae not requiring treatment, fatal, unknown)). Measurement time: preoperative check-up (baseline), prior to surgery, day 1, day 2, and day 3 post-surgery, every 72 h after day 3 (during the time of stay in the ICU), upon discharge from the ICU, at any time up to day 30 post-surgery in case of symptoms or clinical signs indicating the presence of an adverse event.
2. Circulating blood concentration of IL-8 (pg/mL). Time of measurement: preoperative check-up (baseline value), 4 h after the end of the surgical procedure, day 1 post-surgery, day 2 post-surgery, day 3 post-surgery, at discharge from the ICU.
3. Circulating blood concentration of IL-1 (pg/mL). Time of measurement: preoperative check-up (baseline value), 4 h after the end of the surgical procedure, day 1 post-surgery, day 2 post-surgery, day 3 post-surgery, at discharge from the ICU.
4. Circulating blood concentration of IFN-gamma (pg/mL). Time of measurement: preoperative check-up (baseline value), 4 h after the end of the surgical procedure, day 1 post-surgery, day 2 post-surgery, day 3 post-surgery, at discharge from the ICU.
5. Circulating blood concentration of IL-10 (pg/mL). Measurement time: preoperative check-up (baseline), 4 h after the end of the surgical procedure, day 1 post-surgery, day 2 post-surgery, day 3 post-surgery, discharge from the ICU.
6. Circulating blood concentration of IL-18 (pg/mL). Measurement time: preoperative check-up (baseline), 4 h after the end of the surgical procedure, day 1 post-surgery, day 2 post-surgery, day 3 post-surgery, discharge from the ICU.
7. Circulating blood concentration of TNF-alpha (pg/mL). Measurement time: preoperative check-up (baseline), 4 h after the end of the surgical procedure, day 1 post-surgery, day 2 post-surgery, day 3 post-surgery, discharge from the ICU.
8. LDH concentration (U/L). Measurement time: preoperative check-up (baseline), prior to surgery, 4 h after the end of the surgical procedure, day 1 post surgery, day 2 post surgery, day 3 post surgery, every 72 h after day 3 (during the ICU stay), upon discharge from the ICU.
9. C-reactive protein concentration (pg/L). Measurement time: preoperative check-up (baseline), prior to surgery, 4 h after the end of the surgical procedure, day 1 post surgery, day 2 post surgery, day 3 post surgery, every 72 h after day 3 (during the ICU stay), upon discharge from the ICU.
10. Respiratory function (normal, dysfunction, organ failure). Measurement time: preoperative check-up (baseline value), day 1 post surgery, day 2 post surgery, day 3 post surgery, every 72 h after day 3 (during the time of stay in ICU), upon discharge from ICU.
11. Hematological function (normal, dysfunction, organ failure). Measurement time: preoperative check-up (baseline value), day 1 post surgery, day 2 post surgery, day 3 post surgery, every 72 h after day 3 (during the time of stay in ICU), upon discharge from ICU.
12. Cardiovascular, renal and hepatic function (normal, dysfunction, organ failure). Measurement time: preoperative check-up (baseline value), day 1 post surgery, day 2 post surgery, day 3 post surgery, every 72 h after day 3 (during the time of stay in ICU), upon discharge from ICU.
13. Renal function (normal, dysfunction, organ failure). Measurement time: preoperative check (baseline value), day 1 post surgery, day 2 post surgery, day 3 post surgery, every 72 h after day 3 (during ICU stay), at ICU discharge.
14. Liver function (normal, dysfunction, organ failure). Measurement time: preoperative check (baseline value), day 1 post surgery, day 2 post surgery, day 3 post surgery, every 72 h after day 3 (during ICU stay), at ICU discharge.
15. Use of vasopressors (Yes, No). Measurement time: daily until discharge from ICU or final evaluation of the study (30 days post surgery).
16. Need for mechanical ventilation (Yes, No). Measurement time: daily until discharge from ICU or final evaluation of the study (30 days post surgery).
17. Type of mechanical ventilation (noninvasive, invasive). Measurement time: daily until discharge from ICU or final evaluation of the study (30 days post surgery).
18. Duration of mechanical ventilation (Time elapsed from the start to the end of mechanical ventilation. Time of measurement: daily until discharge from the ICU or final evaluation of the study (30 days post surgery).
19. ICU stay (number of days measured from arrival in the ICU to the date of discharge from the ICU). Time of measurement: daily up to 30 days.
20. Hospital stay (number of days measured from arrival in the ICU to the date of discharge from hospital). Time of measurement: daily up to 30 days.
21. Mortality at 30 days (death, not death). Time of measurement: for 30 days.