Kassem Mohammed M., Gonzalez Lorena
SUNY Upstate University Hospital
Upstate Medical University
The splenic artery is defined as aneurysmal when a focal dilation is observed in its diameter of greater than 50% compared to the normal vessel diameter. The normal diameter of the splenic artery varies and ranges from 0.43 cm to 0.49 cm. True splenic artery aneurysms (SAAs) involve all layers of the wall, each of which is intact and thinning. Pseudoaneurysms are the result of a tear in the vessel wall intima with subsequent blood dissection into a false lumen and periarterial hematoma formation. They develop secondary to trauma or inflammation of the splenic artery, such as in cases of pancreatitis. The SAA is the most common visceral artery aneurysm reported. SAA represents 60% to 70% of patients diagnosed with visceral artery aneurysms (VAAs). Hepatic artery aneurysms have been reported in 20%, while celiac or mesenteric artery aneurysms represent 10% of all reported cases of VAAs.
当脾动脉直径出现局灶性扩张，且扩张幅度超过正常血管直径的50%时，即被定义为动脉瘤。脾动脉的正常直径存在差异，范围在0.43厘米至0.49厘米之间。真性脾动脉瘤（SAA）累及血管壁的所有层次，各层完整但变薄。假性动脉瘤是血管壁内膜撕裂，随后血液进入假腔并形成动脉周围血肿的结果。它们继发于脾动脉的创伤或炎症，比如胰腺炎病例。脾动脉瘤是报道中最常见的内脏动脉瘤。脾动脉瘤占诊断为内脏动脉瘤（VAA）患者的60%至70%。肝动脉瘤的报道占20%，而腹腔干或肠系膜动脉动脉瘤占所有报道的内脏动脉瘤病例的10%。
