thrombus is either at the entry of the renal vein or within the inferior vena cava (IVC) < 2 cm from the confluence of the renal vein and the IVC. Level II: Thrombus extends within the IVC > 2 cm above the confluence of the renal vein and IVC but still remains below the hepatic veins. Level III: Thrombus involves the intrahepatic IVC. The size of the thrombus ranges from a narrow tail that extends into the IVC to one that fills the lumen and enlarges the IVC.
What are three main types of rockets that power modern spacecrafts? The three kinds of rockets are solid fuel rockets, liquid fuel rockets, and ion powered rockets. Edit
Most of this weight is fuel, such as liquid hydrogen and liquid oxygen. Rockets need so much fuel in order to overcome Earthâs gravity. Only when they reach a speed of 28 000 km/h are they travelling fast enough to enter orbit.Most rockets are made up of two or three stages.When a stage has used up all of its fuel, it is separated to get rid of the dead weight.ockets need so much fuel in order to overcome Earthâs gravity. Only when they reach a speed of 28 000 km/h are they travelling fast enough to enter orbit.