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
Rockets are limited to 1,500 grams (3.3 Pounds) total weight and no more that 125 grams of propellant in commercially made and certified motors. Some restrictions may apply based on field size and other considerations. Model Rocket launches are governed by the NAR Model Rocket Safety Code. Class 2, High Power Rockets, Tripoli Commercial. Rockets may be larger than 3.3 pounds total weight. The motors must be commercially manufactured and certified between H and N (great than 160 N sec and less than 40,960 N sec) impulse.