老年患者全髋关节置换股骨假体置入期微气栓与循环波动相关性_第二期_2026_医学理论研究

摘要：[目的]利用经颅多普勒超声(TCD)技术来观察老年患者全髋关节置换术(THA)中股骨假体植入期微气栓出现的特殊规律，探究它同循环系统动态改变的可能联系。[方法]选取90名接受腰硬联合麻醉的高龄THA手术患者作为研究对象，在股骨假体置入前1分钟（T0）、置入瞬间（T1）、置入后3分钟（T2）、5分钟（T3）及10分钟（T4）五个时间节点，同步采集有创动脉平均压（Invasive Mean Arterial Pressure，IAMAP）、心率（Heart Rate，HR）、肺动脉氧分压（Pulmonary Artery Oxygen Tension，PaO2）等相关生理参数。用TCD设备对微气栓事件的频次以及影像学特征评分进行监测，并且详细记录术后出现的各种不良反应情况，从而为改良该类手术操作给予科学依据[1]。[结果]在纳入标准的90例THA中，微气栓发生率为41.1%。出现2、3级气栓的患者在T1时刻IAMAP较术前明显降低（P＜0.05），但出血量相比统计学无显著差异（P＞0.05）；在不同的栓子面积下麻黄碱的临床应用频率有明显的统计学意义（P<0.05），而去甲肾上腺素的临床应用频率没有统计学意义（P>0.05）。实验结果表明微气栓形成发生率是41.1%，有血流动力学改变的病例占32.43%[1]；微气栓是否引起血流动力学改变以及严重程度，并不是由它是否存在来决定的，而是和栓子面积大小有关。术中发生循环波动后，及时给予血管活性药物可维持血流动力学平稳。

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