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产科休克是由各种不同病因引起的急性循环功能不全的综合征。引起休克的原因虽不同,但它的主要病理生理改变是有效血循环相对地或绝对地不足,正常有效血循环是由血容量、血管床容积和心输出量三者协调平衡而得到维持;任何一个发生严重障碍即可引起全身组织、器官尤其重要器官和组织的灌流不足,使组织代谢发生障碍和细胞遭受损伤。临床上因而表现为面色苍白,肢端紫绀,皮肤湿冷,脉搏快而弱,血压下降(收缩压<80mmHg),尿量减少或无尿,神志障碍,全身代谢紊乱,甚至昏迷而死亡。病因和分类休克的分类方式很多,现根据病因分类如下。一、低血容量性休克:因大量失血(血液或血浆)即发生内出血或外出血或失水(呕吐、腹泻等)。当血容量突然减少30～40%以上时,回心血量减少,心输出量随之减少。失血量750～1250ml(15～25%)时导致轻度休克(低血压、心率加快);失血1250～1750ml(25～35%)发生中度休克;如果失血1750～2500ml 即将出现严重休克。
Obstetric shock is caused by a variety of different causes of acute circulatory insufficiency syndrome. Although the causes of shock are different, its main pathophysiological changes are the relative or absolute inadequacy of effective blood circulation. The normal and effective blood circulation is maintained by the coordinated balance of blood volume, vascular bed volume and cardiac output. Any one occurs Severe disorders can cause systemic tissue, organs, especially important organ and tissue perfusion, so that tissue metabolism disorders and cell damage. Clinically, it is pale, acral cyanosis, cold skin, fast and weak pulse, decreased blood pressure (systolic blood pressure <80mmHg), decreased urine output or no urine, mental disorders, systemic metabolic disorders, and even coma and death. Etiology and classification Shock classification many ways, are classified according to the cause is as follows. First, hypovolemic shock: Because of massive blood loss (blood or plasma) that occurs within the bleeding or bleeding or dehydration (vomiting, diarrhea, etc.). When a sudden decrease in blood volume of 30 to 40% or more, back to the amount of blood loss, cardiac output decreased. Hypothyroidism (hypotension, accelerated heart rate) occurs when blood loss is between 750 and 1250 ml (15 and 25%); moderate shock occurs between 1250 and 1750 ml (25 and 35%) of blood loss; severe shock is present if blood loss is between 1750 and 2500 ml.