Blunt splenic trauma: Blunt splenic trauma occurs when a significant impact to the spleen from some outside source (i.e.Abdominal traumaMedical device: A medical device is an instrument, apparatus, implant, in vitro reagent, or similar or related article that is used to diagnose, prevent, or treat disease or other conditions, and does not achieve its purposes through chemical action within or on the body (which would make it a drug).Summarised from the FDA's definition.Femoral fractureChao Yao-dong: Chao Yao-dong (died August 20, 2008) was a Taiwanese politician, economist and former Minister of Economic Affairs (1981–84).National Center for Injury Prevention and Control: The U.S.Inferior vena cava filter: An inferior vena cava filter (IVC filter) is a type of vascular filter, a medical device that is implanted by interventional radiologists or vascular surgeons into the inferior vena cava to presumably prevent life-threatening pulmonary emboli (PEs). Their effectiveness and safety profile is not well established, and in general, they are only recommended in some high-risk scenarios.National Trauma Data Bank: The National Trauma Data Bank (NTDB), also called the American College of Surgeons National Trauma Data Bank, is a compilation of information about traumatic injuries and outcomes in the United States. Hospital emergency rooms and other institutions such as trauma centers which are participants submit data and receive in return access to reports analyzing data about both their own operations and trauma medicine in the United States as a whole.