Table 1 Eligibility criteria

Elective surgery

Emergency procedure

Reoperation, redo procedure

Incapacitated patient

Uncontrolled hypotension (< 90 mmHg)

Uncontrolled hypertension (> 180 mmHg)

High-risk valvular disease (e.g. aortic stenosis)

Endocrine hypertension (Conn’s syndrome, pheochromocytoma)

Sepsis (infection and SOFA ≥ 2 pts.)

Conditions blocking lung ultrasound (pneumothorax without drainage, former pulmonary resection, pleural effusion affecting more than 2 interspaces)

Pregnancy

General surgical procedures

Estimated duration of anaesthesia > 60 min

ASA classes 2 or 3