injuries and poisoning
Pelvic Fractures
Causes of Pelvic Fractures
In young adults, severe fractures of the entire pelvis can result from high-speed car or motorcycle crashes, collision of a car with a pedestrian, or falls from a height. These fractures can cause life-threatening bleeding, whether the skin is broken or not. Dangerously low blood pressure ( Shock ) can result. Also nearby nerves and organs, such as the bladder, reproductive organs, and intestine, may be damaged. Severe fractures are usually unstable. In some older people, osteoporosis weakens the bones. Thus, they may fracture part of the pelvis if they fall—for example, when getting out of the bathtub, when going down steps, or even while standing on level ground. One type of pelvic fracture tends to occur mainly in adolescents, especially those involved in sports. These fractures (called avulsion fractures) usually occur when a muscle contracts suddenly and pulls a small piece of bone from the ischium where the hamstring muscles are attached (near the base of the buttocks). 