背景:面部覆盖物(例如,巴拉克拉法斯,Niqabs,医用/外科口罩,呼吸器,等。),施加低水平的气流阻力负荷,全世界数百万孕妇都穿着,但目前很少有数据表明它们对妊娠相关心血管和肺反应的影响.
方法:对16名孕妇和16名非孕妇进行生理监测(心率,血压,平均动脉压,总外围阻力,每搏输出量,心输出量,氧饱和度,经皮二氧化碳,胎儿心率)和主观(用力)1小时的混合久坐姿势活动(坐着,站立)和适度运动(自行车测力计),有或没有佩戴N95过滤面罩呼吸器,其过滤阻力载荷为94.1Pa(9.6mmH2O)-119.6Pa(12.2mmH2O)压力。
结果:外部气流阻力负荷与舒张压增加有关(p=0.004),平均动脉压(p=0.01),和所有研究对象的主观努力得分(p<0.001)。对于任何心血管疾病,怀孕组和非怀孕组之间的外部电阻负荷均无显着差异。1小时以上的肺和主观变量。
结论:外部气流阻力负荷低,在久坐的姿势活动和超过1小时的适度运动期间,与所有研究对象的舒张压和平均动脉压的增加有关,但妊娠本身与研究中使用的气道阻力负荷的生理或主观反应无显著差异.
BACKGROUND: Facial coverings (e.g., balaclavas, niqabs, medical/surgical masks, respirators, etc.), that impose low levels of airflow resistive loads, are worn by millions of pregnant women worldwide, but little data exist addressing their impact on pregnancy-associated cardiovascular and pulmonary responses.
METHODS: 16 pregnant and 16 non-pregnant women were monitored physiologically (heart rate, blood pressure, mean arterial pressure, total peripheral resistance, stroke volume, cardiac output, oxygen saturation, transcutaneous carbon dioxide, fetal heart rate) and subjectively (exertion) for 1 h of mixed sedentary postural activity (sitting, standing) and moderate exercise (bicycle ergometer) with and without wearing N95 filtering facepiece respirators with filter resistive loads of 94.1 Pa (9.6 mm H2O) - 119.6 Pa (12.2 mm H2O) pressure.
RESULTS: The external airflow resistive loads were associated with increases in diastolic pressure (p = 0.004), mean arterial pressure (p = 0.01), and subjective exertion score (p < 0.001) of all study subjects. No significant differences were noted with the external resistive loads between the pregnant and non-pregnant groups for any cardiovascular, pulmonary and subjective variable over 1 h.
CONCLUSIONS: Low external airflow resistive loads, during combined sedentary postural activity and moderate exercise over 1 h, were associated with increases in the diastolic and mean arterial pressures of all study subjects, but pregnancy itself was not associated with any significant differences in physiologic or subjective responses to the external airway resistive loads utilized in the study.