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In general, primary blast injuries are characterized by the absence of external injuries; thus internal injuries are frequently unrecognized and their severity underestimated.
By increasing the pressure or its duration, the severity of injury will also increase.
Typically, Hirschsprung’s disease is diagnosed shortly after birth, although it may develop well into adulthood, because of the presence of megacolon, or because the baby fails to pass the first stool meconium within 48 hours of delivery.
In rare cases, the lack of nerve bodies involves more of the colon.
Remember, unless you look for it, you will miss it! The following are key risk factors that increase the likelihood of a patient getting a pulmonary embolism: 1. Sensitive materials that can be initiated by a relatively small amount of heat or pressure are primary explosives and materials that are relatively insensitive are secondary or tertiary explosives.
A pulmonary embolism is often caused by the formation of a deep vein thrombosis (DVT) which then breaks free and travels to the lung, causing a blockage within the pulmonary artery. In other instances, the target provides the raw material for the objects thrown into people, e.g., shattered glass from a blasted-out window or the glass facade of a building.
Depending on the size of the thrombus, and the location within the pulmonary arterial tree, this blockage will result in a minor decrease in oxygenation of the blood through to a complete obstruction resulting in sudden death. Tertiary injuries are caused by the displacement of air by the explosion which creates a blast wind that can throw victims against solid objects.
Any patient who presents with signs and symptoms of a pulmonary embolism should be treated as a medical emergency. However, there may be extensive blood loss within the body cavities.
As pulmonary embolisms rarely present with a clear clinical picture, paramedics must maintain a high index of suspicion with any patient who presents with shortness of breath without a clear clinical cause. Fragmentation wounds may be lethal and therefore many anti-personnel bombs are designed to generate fragments. Some explosives, such as nail bombs, are deliberately designed to increase the likelihood of secondary injuries.