الفهرس 
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Abstract
Introduction : Vascular injury resulting from trauma is a leading cause of morbidity and mortality worldwide. Exsanguination is perhaps the most important cause of potentially preventable death after injury. The resulting ischemic tissue damage leads to high rates of amputation in a characteristically young and active population. However, the epidemiological study of vascular trauma is a relatively an under-exploited field. Aim of work: The purpose of this study is to determine the incidence of vascular injuries, modes and mechanisms of trauma and their relations with regional vascular injury distribution and the outcome of vascular injuries in polytrauma patients. Summary: A total of 520 polytrauma patients were enrolled in this study to define the incidence of vascular injuries, modes and mechanisms of trauma and their relations with regional vascular injury distribution and the outcome of vascular injuries in polytrauma patients. The incidence of vascular injuries in these patients was 36.5% (190 patients). Most of the studied polytrauma cases were middle-aged males in vascular injury group and non-vascular injury group. According AIS ≥3, patients with vascular injuries had considerable more severe injuries than other patients. The most common region with vascular injuries was peripheral vascular injuries in 95.8% [52.6% in lower limb and 43.2% in upper limb], followed by central vascular injuries in 4.2% [1.6% in neck, 1.6% in thorax and 1 % in abdomen]. Blunt trauma was considerably more common than penetrating in both groups. Moreover, blunt trauma was more common in all regional vascular injuries (66.7% of neck, 75% of lower limb, and 100% of thoracic and abdominal vascular injuries) except upper limb (in 47.8%).The central vascular injuries had various associated injuries which were more common and fatal (intrathoracic, visceral, pelvic and spine injuries in trunk; and TBI and facial fractures in neck) than peripheral vascular injuries (bone fractures and peripheral nerve injuries). The studied patients with vascular injuries had significant worse outcome (more ISS, more surgical intervention, more ICU admission, more hospital LOS and more mortality rate) than patients without vascular injuries. As well, the studied patients with central vascular injuries had considerable worse outcome than those with peripheral vascular injuries.