| 摘要: |
| 目的 探讨提高多普勒超声帧频对测量大脑中动脉（MCA）收缩期峰值流速（PSV）和搏动指数（PI）的影响及重要性。方法 应用彩色多普勒超声检测659例孕20-40w的正常胎儿大脑中动脉（MCA）的血流频谱，测量其血流参数：收缩期峰值流速（PSV）和搏动指数（PI），第一次测量（MCA.g）是在常规设置下进行的，第二测量（MCA.o）是在通过优化设置提高帧频的条件下进行，并将两次MCA血流参数测量结果进行比较。结果 MCA.o优化设置后的PSV、PI值明显高于MCA.g设置（P<0.001）。结论 与常规设置的超声测量技术相比，优化多普勒超声设置提高帧频，可提高胎儿MCA测量血流参数PSV和PI值，其对产前胎儿循环系统的评估起着重要作用，值得临床进一步研究，并调整当前MCA血流参数正常范围的参考值。 |
| 关键词: 多普勒超声 产前 胎儿 大脑中动脉 帧频 |
| DOI： |
| 投稿时间：2019-04-24修订日期：2019-04-24 |
| 基金项目: |
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| To explore the importance of improving Doppler ultrasound frame frequency in measuring middle cerebral artery of prenatal fetus |
| wanglijuan,luohong |
| () |
| Abstract: |
| Objective To explore the effect and importance of increasing Doppler ultrasound frame frequency on measuring peak systolic velocity (PSV) and pulsatility index (PI) of middle cerebral artery (MCA). Methods The blood flow spectrum of 659 normal fetal middle cerebral artery (MCA) during 22-40 weeks of gestation was measured by color Doppler ultrasound. The parameters of blood flow were measured: peak systolic velocity (PSV) and pulsatility index (PI). The first measurement of MCA (MCA.g) was performed under the routine setting of ultrasound equipment.The second measurement of MCA (MCA.o) is carried out under the condition of improving the frame rate by optimizing the setting, and the two measurement results of MCA blood flow parameters are compared.Results The PSV, PI value and frame frequency of MCA.o optimized setting were significantly higher than those of MCA.g conventional setting (P < 0.001). CONCLUSION Compared with conventional ultrasound measurement technology, optimizing Doppler ultrasound settings and increasing frame frequency can improve the PSV and PI values of fetal MCA blood flow parameters. It plays an important role in the evaluation of prenatal fetal circulation system. It is worth further clinical study and adjusting the reference value of the current normal range of MCA blood flow parameters. |
| Key words: Doppler ultrasound Prenatal Fetus Middle cerebral artery Frame rate |
