Lung Ultrasound Versus Inferior Vena Cava Collapsibility Index for Early Prediction of Volume Overload During Transurethral Resection of Prostate

Inclusion Criteria: * Male patient * American Society of Anesthesiologists classification II-III * scheduled for Transurethral resection of the prostate syndrome under spinal anesthesia. Exclusion Criteria: * Patient refusal. * Uncooperative patients. * Patients with major respiratory, cardiac, renal or hepatic disorders. * Patients whose ultrasound did not clearly show the inferior vena cava as (morbidly obese patients or patients with moderate to marked ascites). * Patients who have contraindications to spinal anesthesia (neurological disease, severe hypotension, coagulopathy, low fixed cardiac output).