Satellite C-band usually transmits around 6 GHz and receives around 4 GHz. It uses large (2.4- 3.7 meter) antennas. These are the large white domes that you see on top of the cruise ships and commercial vessels.
Inferior Vena Cava Filter Placement and Removal. 1  During Inferior Vena Cava (IVC) filter placement, a filtering device is placed within the IVC, a large vein in the abdomen that returns blood from the lower body to the heart. Blood clots in the veins of the legs and pelvis can occasionally travel to the lungs where they may cause a pulmonary embolism or blockage.
After receiving more than 900 reports of problems with IVC filters over the last five years, federal regulators are warning doctors to remove the filters, After receiving more than 900 reports of problems with IVC filters over the last five years, federal regulators are warning doctors to remove the filters, which are meant to prevent pulmonary embolisms, before they can break free inside the patient and do damage. The FDA issued a safety alert this week for inferior vena cava (IVC) filters.