尚小珂,卢蓉,柳梅,肖书娜,王斌,张长东,董念国

• 1:华中科技大学同济医学院附属协和医院心外科
• 2:武汉大学第二临床学院医学科学研究院
• 3:武汉市第一医院ICU
• 4:湖北省妇幼保健院ICU

摘要(Abstract)：

目的使用电导导管测量小鼠右心室压力-容积环,评估健康小鼠及肺动脉高压模型小鼠的血流动力学。方法将16只小鼠随机分为实验组(n=8)和对照组(n=8)。实验组小鼠暴露在常压缺氧的环境中10 d,对照组小鼠被安置在室内空气中。使用1.2 F导管从右颈动脉插至升主动脉,另外再穿刺右心室心尖部,用20号针头导入1.2 F压力-容积导管,获得压力-容积的测量值并计算血流动力学参数。比较两组小鼠血流动力学参数的差异。结果两组小鼠体重、右心房重量/体重、左心房重量/体重、(左心室+室间隔)重量/体重比较,差异均无统计学意义(均P>0.05);实验组小鼠右心室重量/(左心室+室间隔)重量[(0.30±0.03)比(0.23±0.06),P=0.0291]、右心室重量/体重[(1.04±0.13)比(0.74±0.10),P=0.0001]显著高于对照组,差异均有统计学意义。两组小鼠心率、主动脉收缩压、主动脉舒张压、右心室舒张末期容积、心室内最大压力上升速度、右心室收缩末期压力-容积关系的斜率、心室内最大压力下降速度、松弛因子τ比较,差异均无统计学意义(均P>0.05)。实验组小鼠血细胞容积率、右心室收缩压、右心室舒张压、搏出功、压力导数的最大值与右心室舒张末期压力容积关系的斜率、前负荷补充搏功、动脉有效弹性显著大于对照组,差异均有统计学意义;而射血时间[(36±2)ms比(45±1)ms,P=0.0001]、心输出量[(5.2±2.6)ml/min比(8.5±2.3)ml/min,P=0.0026]、心室顺应性[(0.43±0.13)μl/mm Hg比(0.68±0.21)μl/mm Hg,P=0.0030(1 mm Hg=0.133 k Pa)]、射血分数[(28±13)%比(51±11)%,P=0.0008]、耦合效率[(0.36±0.15)比(0.73±0.26),P=0.0001]显著低于对照组,差异亦均有统计学意义。结论本研究验证了电导导管测量小鼠右心室压力-容积数据的可能性,为健康状态或疾病状态下的右心室-肺动脉耦合机制的研究提供了方向。

关键词(KeyWords)： 压力-容积环;肺动脉高压;电导导管;右心室-肺动脉耦合

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重大项目(31330029);; 武汉市中青年医疗骨干人才专项基金(201477);; 武汉市晨光计划人才专项基金(2016)

作者(Author): 尚小珂,卢蓉,柳梅,肖书娜,王斌,张长东,董念国

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