After intubation of the patients who are undergoing arthroscopic shoulder surgery, plethysmographic waveform will be recorded with blood pressure, heart rate and end-tidal carbon dioxide values and inferior vena cava (IVC) diameter will be measured by ultrasound. New hemodynamic values will be measured after passive leg raising maneuver. Blood pressure, heart rate, end-tidal carbon dioxide values will be re-measured and plethysmographic waveform will be recorded after beach chair position for surgery.

Patients aged between 18-65 years who are undergoing arthroscopic shoulder surgery will be examined. After giving detailed information, voluntary certificate will be taken from patients who accept to participate in the study. Heart rate, oxygen saturation and blood pressure values will be recorded by routine monitoring. After intubation of the patients, plethysmographic waveform will be recorded with blood pressure, heart rate and end-tidal carbon dioxide values and IVC diameter will be measured by ultrasound. New hemodynamic values will be measured after passive leg raising maneuver. Blood pressure, heart rate, end-tidal carbon dioxide values will be re-measured and plethysmographic waveform will be recorded after beach chair position for surgery.

Inclusion Criteria:

• 18-65 years old patients,
• The American Society of Anesthesiologists (ASA) physical status classification score 1-2,
• Patients scheduled for arthroscopic shoulder surgery, intubated, sitting position

Exclusion Criteria:

• Patient refusal,
• Patients with current heart and valve disease,
• Patients with ASA 3-4 status,
• Emergency cases

ASA 1-2 status patients between the ages of 18-65 to be performed arthroscopic shoulder surgery with informed consent