Inclusion Criteria:  Pregnant women who will undergo elective cesarean section Patients with ASA 1-2 Patients aged 18-40 years  Exclusion Criteria:  Emergency cases <18 or > 40 years old Gestational age <36 weeks BMI ≥40 Cardiovascular disease Patients with ASA 3-4 Those with peripheral vascular disease Patients for whom spinal anesthesia is contraindicated Refusal to participate