食道血管扩张（曲张）后破裂，造成大出血。
Rupture of dilated esophageal blood vessels ( varices) causing massive bleeding.
目的：建立门脉高压食道静脉曲张杂交犬模型，探讨生长抑素及奥曲肽对动物模型门静脉压力和血管活性物质的影响。
Objective: to establish a canine model of portal hypertension with esophageal varices, and explore the effects of somatostatin and octreotide on portal pressure and vasoactive substance.
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