中间压力正常化主壁应变值与腹腔大动脉动脉瘤生长率的增加有关
Zachary R Zottola1, Daniel S Kong1, Ankit N Medhekar1
1Division of Vascular Surgery, Department of Surgery, Cardiovascular Engineering Lab, University of Rochester Medical Center, Rochester, NY, United States.
Frontiers in cardiovascular medicine
|September 18, 2023
概括
超声波弹性图 (USE) 测量了腹腔大动脉瘤 (AAA) 壁应变,揭示了中间应变值,而不是直径,与AAA增长速度更快相关,这表明了新的风险评估方法.
科学领域:
- 生物医学工程 生物医学工程
- 心血管研究研究心血管研究
- 医疗成像医学成像
背景情况:
- 目前的腹腔大动脉瘤 (AAA) 评估依赖于直径和生长速度,这些不足以预测破裂风险.
- 在AAA的病理变异需要先进的评估方法超出形态测量.
- 像压力正常化的AAA壁应变 (PP) 这样的生物力学参数为AAA评估提供了有价值的见解.
研究的目的:
- 为了将压力正常化的AAA主壁应变 (PP) 与最大直径和生长速度相关联.
- 评估超声波弹性图 (USE) 在评估AAA生物力学方面的实用性.
- 为了研究AAA壁硬度和动脉瘤进展之间的关系.
主要方法:
- 使用经过验证的超声波弹性图 (USE) 技术,使用有限元网来追踪AAA墙壁位移.
- 在心脏循环中计算压力正常化的AAA主壁应变 (PP).
- 在健康的大动脉和AAA之间,以及在不同的AAA大小类别和增长率之间比较PP.
主要成果:
- 非动脉瘤大动脉表现出比AAA更高的PP/PP,表明其壁面更硬.
- 在小和大AAA之间没有观察到/PP的显著差异.
- 中间/PP三位数中的AAA显示出与其他三位数相比显著更高的潜在增长率.
结论:
- AAA墙壁应变 (/PP) 是独立于最大直径.
- 中间/PP值与AAA扩张率的增加有关,突出显示了一个潜在的风险指标.
- 这表明PP可能为AAA风险分层和监测提供更精确的方法,可能引导成像频率.
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