Objective: To study the regulation of blood pulse volume via photoplethysmography (PPG) signal detected from toe, while the lower limb is passively raised in different height positions. Methods: Use a modified non-inv...Objective: To study the regulation of blood pulse volume via photoplethysmography (PPG) signal detected from toe, while the lower limb is passively raised in different height positions. Methods: Use a modified non-invasive PPG technique to detect the blood pulse signal on toe with infrared (IR) photo sensor. A protocol consisting of two postures, i.e., supine and 45° reclining, was designed to conduct laboratory trial in this study. During the period of performing the protocol of these postures, the lower limb was passively raised from the heights of 10 cm to 60 cm randomly and individually with sponge blocks underneath the foot. Results: In the supine posture, the higher the foot was passively raised, the more the blood PPG signal decreased. In the 45° reclining posture, the blood PPG signal increased at the beginning and then decreased in the foot height position from 10 cm to 60 cm. In both postures the normalized AC signal changes significantly while the normalized DC signal changes little. Conclusion: The toe PPG signals can obviously indicate the regulated blood volume change with the designated postural procedures due to the heart level position.展开更多
目的:分析彩色多普勒超声在双波长激光治疗婴幼儿血管瘤的应用价值。方法:回顾性分析2021年3月至2023年3月收治的血管瘤患者临床资料,所有患者在行Cynergy双波长激光治疗前均接受彩色多普勒超声检查,根据不同的血流信号和皮损深度,观察...目的:分析彩色多普勒超声在双波长激光治疗婴幼儿血管瘤的应用价值。方法:回顾性分析2021年3月至2023年3月收治的血管瘤患者临床资料,所有患者在行Cynergy双波长激光治疗前均接受彩色多普勒超声检查,根据不同的血流信号和皮损深度,观察治疗效果及并发症发生情况。结果:198例血管瘤患儿纳入分析,共计212处皮损,其中根据血流信号分为无血流信号73例(34.3%)、稀少血流信号76例(35.8%)、中等血流信号63例(29.9%),有效率为100%,96.1%,85.7%,三组比较差异有统计学意义(P<0.05);根据皮损深度分为<1.2 mm 69例(32.5%),1.2~3.0 mm 88例(41.5%),>3 mm 55例(26.0%),有效率为100%,94.3%,83.6%,三组比较差异有统计学意义(P<0.05);在所有纳入的患者中,有21.7%的患儿出现不良反应。结论:彩色多普勒超声在双波长激光治疗婴幼儿血管瘤中具有重要的应用价值,可以实时监测治疗过程,并帮助临床医师预估疗效。展开更多
文摘Objective: To study the regulation of blood pulse volume via photoplethysmography (PPG) signal detected from toe, while the lower limb is passively raised in different height positions. Methods: Use a modified non-invasive PPG technique to detect the blood pulse signal on toe with infrared (IR) photo sensor. A protocol consisting of two postures, i.e., supine and 45° reclining, was designed to conduct laboratory trial in this study. During the period of performing the protocol of these postures, the lower limb was passively raised from the heights of 10 cm to 60 cm randomly and individually with sponge blocks underneath the foot. Results: In the supine posture, the higher the foot was passively raised, the more the blood PPG signal decreased. In the 45° reclining posture, the blood PPG signal increased at the beginning and then decreased in the foot height position from 10 cm to 60 cm. In both postures the normalized AC signal changes significantly while the normalized DC signal changes little. Conclusion: The toe PPG signals can obviously indicate the regulated blood volume change with the designated postural procedures due to the heart level position.
文摘目的:分析彩色多普勒超声在双波长激光治疗婴幼儿血管瘤的应用价值。方法:回顾性分析2021年3月至2023年3月收治的血管瘤患者临床资料,所有患者在行Cynergy双波长激光治疗前均接受彩色多普勒超声检查,根据不同的血流信号和皮损深度,观察治疗效果及并发症发生情况。结果:198例血管瘤患儿纳入分析,共计212处皮损,其中根据血流信号分为无血流信号73例(34.3%)、稀少血流信号76例(35.8%)、中等血流信号63例(29.9%),有效率为100%,96.1%,85.7%,三组比较差异有统计学意义(P<0.05);根据皮损深度分为<1.2 mm 69例(32.5%),1.2~3.0 mm 88例(41.5%),>3 mm 55例(26.0%),有效率为100%,94.3%,83.6%,三组比较差异有统计学意义(P<0.05);在所有纳入的患者中,有21.7%的患儿出现不良反应。结论:彩色多普勒超声在双波长激光治疗婴幼儿血管瘤中具有重要的应用价值,可以实时监测治疗过程,并帮助临床医师预估疗效。
