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用热传导法直接测量宫颈和阴道壁的表浅血流量。在妊娠中晚期,妊高征患者的宫颈表浅血流量及宫颈、阴道壁血流量之比明显高于正常妊娠组;而阴道壁表浅血流量无明显差异。相同孕周,妊高征的胎盘小于正常胎盘。推测,妊高征患者的这些变化同她们有全身小动脉痉挛,特别是子宫,胎盘动脉阻力增加有关。
Direct measurement of superficial blood flow to the cervix and vaginal wall by thermal conduction. In the second trimester of pregnancy, patients with PIH cervical superficial blood flow and cervix, vaginal wall blood flow was significantly higher than the normal pregnancy group; while the superficial vaginal wall blood flow was no significant difference. The same gestational age, PIH placenta less than normal placenta. Speculated that these changes in patients with PIH with systemic arteriolar spasm they have, especially the uterus, increased resistance to placental artery.