Femoral Vein, Internal Jugular Vein and Inferior Vein Cava Collapsibility Indices in Polytrauma Patients by Sonographic Evaluation Before and After Resuscitation.

Inclusion Criteria: * Adult patients aged ≥ 18years. ( Patients presented by hypovolemic shock Exclusion Criteria: * Patient refusal Body Mass Index \> 40 kg/m2. Cardiac patients or cardiac tamponade Aortic injury or for cardio-thoracic emergent operation Patients with abdominal mass or other pathology as abdominal collection. Any patient needs emergent surgical intervention History of pulmonary artery hypertension. Femoral vein occlusion. Pregnancy. Pulmonary oedema. Patients will need mechanical ventilation.