Van Dorsten J P, Miller F C
Obstet Gynecol. 1981 Feb;57(2):257-60.
Fetal heart rate (FHR) decelerations resembling post-paracervical block (PCB) bradycardia were observed immediately after the inadvertent intrauterine injection of lidocaine hydrochloride. A review of the pathophysiology of post-PCB bradycardia is presented. The administration of a local anesthetic, either into the paracervical tissues or directly into the uterine cavity, may precipitate FHR decelerations principally, through arterial vasoconstriction with subsequent reflex responses and/or hypoxia in the fetus.
在意外子宫内注射盐酸利多卡因后，立即观察到类似宫颈旁阻滞（PCB）后心动过缓的胎儿心率（FHR）减速。本文综述了PCB后心动过缓的病理生理学。将局部麻醉剂注入宫颈旁组织或直接注入宫腔，可能主要通过动脉血管收缩及随后的反射反应和/或胎儿缺氧，导致FHR减速。
