Hypotension after spinal anesthesia is associated with significant perioperative morbidity and mortality, especially in hypovolemic patients. Ultrasonographic measurement of internal jugular vein (IJV) has been recently shown as effective in predicting the intravascular volume status. The aim was to investigate the reliability of preanesthetic ultrasound measurements of IJV in predicting hypotension after spinal anesthesia.

Hypotension after spinal anesthesia is associated with significant perioperative morbidity and mortality, especially in hypovolemic patients. Ultrasonographic measurement of internal jugular vein (IJV) has been recently shown as effective in predicting the intravascular volume status. The aim was to investigate the reliability of preanesthetic ultrasound measurements of IJV in predicting hypotension after spinal anesthesia.

Inclusion Criteria:

• Patients between the ages of 18-65 Patients who read and accept the consent form of the study Patients undergoing elective surgery under spinal anesthesia

Exclusion Criteria:

• under 18 years old, ASA scores 3-4, presence of any significant hepatic, renal, cardiavasculary, or respiratory disease, having left ventricular ejection fraction less than 40%, and allergy to study medications.

Patients between the ages of 18-65