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首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Pulmonary effects of intravenous atropine induce ventilation perfusion mismatch
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Pulmonary effects of intravenous atropine induce ventilation perfusion mismatch

机译:静脉使用阿托品引起的肺通气灌注不匹配

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Atropine is used for a number of medical conditions, predominantly for its cardiovascular effects. Cholinergic nerves that innervate pulmonary smooth muscle, glands, and vasculature may be affected by anticholinergic medications. We hypothesized that atropine causes alterations in pulmonary gas exchange. We conducted a prospective interventional study with detailed physiologic recordings in anesthetized, spontaneously breathing rats (n = 8). Animals breathing a normoxic gas mixture titrated to a partial arterial pressure of oxygen of 110-120 were exposed to an escalating dose of intravenous atropine (0.001, 0.01, 0.1, 5.0, and 20.0 mg/kg body mass). Arterial blood gas measurements were recorded every 2 min (×5) at baseline, and following each of the 5 doses of atropine. In addition, the animals regional pulmonary blood flow was measured using neutron-activated microspheres. Oxygenation decreased immediately following intravenous administration of atropine, despite a small increase in the volume of inspired air with no change in respiratory rate. Arterial blood gas analysis showed an increase in pulmonary dysfunction, characterized by a widening of the alveolar-arteriole gradient (p < 0.003 all groups except for the lowest dose of atropine). The microsphere data demonstrates an abrupt and marked heterogeneity of pulmonary blood flow following atropine treatment. In conclusion, atropine was found to decrease pulmonary gas exchange in a dose-dependent fashion in this rat model.
机译:阿托品可用于多种医学状况,主要是因为其具有心血管作用。支配肺血管平滑肌,腺体和脉管系统的胆碱能神经可能会受到抗胆碱能药物的影响。我们假设阿托品引起肺气体交换的改变。我们对麻醉的自发呼吸大鼠(n = 8)进行了详细的生理记录的前瞻性干预研究。使呼吸至氧分压为110-120的常氧混合气体的动物暴露于递增剂量的静脉内阿托品(0.001、0.01、0.1、5.0和20.0 mg / kg体重)。在基线以及每5剂阿托品剂量之后,每2分钟(×5)记录一次动脉血气测量值。此外,使用中子激活的微球测量了动物的局部肺血流量。尽管吸入的空气量略有增加,但呼吸频率没有变化,但静脉注射阿托品后,氧合立即降低。动脉血气分析显示肺功能障碍增加,其特征是肺泡-小动脉梯度变宽(除最低剂量的阿托品外,所有组均p <0.003)。微球数据证明了阿托品治疗后肺血流的突然和明显异质性。总之,在该大鼠模型中,阿托品被发现以剂量依赖性方式减少肺气体交换。

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