The purpose of this study is to verify any existing relationship between urinary parameters (such as excretion of sodium, chlorine, urinary partial CO2 pressure [PuCO2]) and general volemic indicators (such as PiCCO, ScvO2, O2 delivery) during liver transplant.

Inclusion Criteria:

• surgery for liver transplantation
• age 18-75
• ASA class I-III

Exclusion Criteria:

• age above 75 or under 18
• ASA class IV
• pre-existing renal failure
• pregnant patients
• patients unable to give written consent

Patients undergoing liver transplantation