Department of Vascular Surgery, Rigshospitalet, Copenhagen, Denmark.
Copenhagen Academy for Medical Education and Simulation (CAMES), Copenhangen, Denmark.
Ultrasound Med Biol. 2022 Sep;48(9):1778-1784. doi: 10.1016/j.ultrasmedbio.2022.05.003. Epub 2022 Jun 9.
This study was aimed at quantifying the abdominal aortic aneurysm (AAA) compression phenomenon and assessing the use of a new tool to estimate transducer pressure in vivo. In this cross-sectional study, 47 participants with AAA and a median anterior-to-posterior (AP) AAA diameter of 46 mm (range: 30-76 mm) were included. The majority of the patients were overweight with body mass indexes >25 (33/47, 70%). A standardized ultrasound (US)-compatible gel pad, with a pre-defined thickness (15 mm) and mass (150 g), was interposed between the US transducer and participant to estimate the applied transducer pressure. A firm transducer pressure significantly lowered the median AP diameter from 46.1 mm (range: 29.7-76.3) to 39.4 mm (range: 21.7-67.5) (p = 0.001). The mean diameter bias between light and firm transducer pressure was 6.1 mm (95% confidence interval: 4.9-7.3). The applied transducer pressure varied significantly and could be measured by translating the deformation of a low-tech gel pad interposed between the US transducer and the participant.
本研究旨在量化腹主动脉瘤（AAA）压迫现象，并评估一种新工具在体内估计换能器压力的应用。在这项横断面研究中，纳入了 47 名 AAA 患者，AAA 的前后径中位数为 46mm（范围：30-76mm）。大多数患者超重，体重指数>25（33/47，70%）。在超声换能器和参与者之间插入一个标准化的超声兼容凝胶垫，具有预设的厚度（15mm）和质量（150g），以估计施加的换能器压力。换能器压力适中可使 AAA 的前后径中位数从 46.1mm（范围：29.7-76.3）降至 39.4mm（范围：21.7-67.5）（p=0.001）。在轻压和适压之间，平均直径偏差为 6.1mm（95%置信区间：4.9-7.3）。施加的换能器压力变化显著，可通过翻译置于超声换能器和参与者之间的低技术凝胶垫的变形来测量。
