Goal directed fluid therapy is a new standard surgical procedure which is successful in patients undergoing hip revision arthroplasty, There has been a reduction of postoperative complications, most importantly surgery with a decrease inbleeding, as well as in hospital and intensive care stays it is related. The aim of this study is to evaluate effectiveness of pulmonary ultrasound score and vena cava collapse index measurements in the patients undergoing hip surgery under spinal anesthesia and relation with peroperative fluid management.

Patients who will undergo hip surgery under spinal anesthesia using the closed envelope method it will be randomized and divided into 2 groups.

1.The inferior vena cava collapse index IVC CI and lung ultrasound score (LUS) measurements and goal directed fluid therapy will be done 2. Group applying zero balance liquid therapy to patients with conventional methods is planned.

1. Patients in the group will be started with fluid replasment at an hourly rate of 2ml/kg/h and with ultrasound measurement the infused fluid will be evaluated and regulated.
2. Crystalloid liquid infusion at a rate of 2ml/kg/hour will be administered to the patients in the group additional fluid replacement will be decided by monitoring bleeding and urinary output, zero balance is aimed at patients. Both groups were treated with spinal anesthesia in the postoperative period 120. minute IVC CI and the LUS score value will be checked.

If the CI is below 50% and the LUS score is below 15, fluid management will be considered as successful.

Inclusion Criteria:

• Patients over the age of 65 who will undergo hip surgery
• ASA I-II-III patients

Exclusion Criteria:

• Patients under the age of 65
• Patients with ASA IV-V
• Patients with BMI>above 35
• Patients with an Lus score of 15 and above
• Patients who have not undergone spinal anesthesia

Patients undergoing hip surgery under spinal anesthesia