胎儿玻状血管的自然进程：SlowflowHD 纵向研究。

Natural Course of Fetal Hyaloid Artery: SlowflowHD Longitudinal Study.

机构信息

Department of Obstetrics and Gynecology, Miyake Clinic, Minami-ku, Okayama, Japan.

Department of Perinatology and Gynecology, Kagawa University Graduate School of Medicine, Miki, Kagawa, Japan.

出版信息

J Ultrasound Med. 2022 Sep;41(9):2259-2267. doi: 10.1002/jum.15911. Epub 2021 Dec 3.

DOI:10.1002/jum.15911

PMID:34859899

Abstract

OBJECTIVE

To assess the natural course of the fetal hyaloid artery (FHA) using SlowflowHD during pregnancy.

METHODS

One-hundred and eighteen normal fetuses were studied longitudinally using SlowflowHD to assess the natural course of FHA at 18-21 + 6, 28-31 + 6, and after 35 weeks of gestation. Blood flow of FHA with/without its branches (BF) was evaluated using SlowflowHD, and the band of FHA without blood flow (Band) was identified in each gestational period. The natural course of FHA was classified into six types: Type A, not detected (ND) in each gestational period; Type B, Band at 18-21 + 6 weeks; Type C, Band at 18-21 + 6 and 28-31 + 6 weeks; Type D, BF at 18-21 + 6 weeks; Type E, BF at 18-21 + 6 weeks and Band at 28-31 + 6 weeks; Type F, BF at 18-21 + 6 and 28-31 + 6 weeks.

RESULTS

BF, Band, and ND were 83.5, 15.5, and 1.0% at 18-21 + 6 weeks, 8.8, 15.5, and 75.7% at 28-31 + 6 weeks, and 0, 0, and 100% after 35 weeks, respectively. Type A was 1.0%, Type B was 13.6%, Type C was 1.9%, Type D was 61.2%, Type E was 13.6%, and Type F was 8.7%.

CONCLUSIONS

The presence of FHA blood flow before 30 weeks of gestation should be regarded as a physiologic phenomenon in normal fetuses.

摘要

目的

使用 SlowflowHD 评估胎儿玻状血管（FHA）在妊娠期间的自然进程。

方法

对 118 例正常胎儿进行纵向研究，使用 SlowflowHD 在 18-21+6、28-31+6 和 35 周后评估 FHA 的自然进程。使用 SlowflowHD 评估 FHA 及其分支（BF）的血流，并在每个妊娠期间识别无血流的 FHA 带（Band）。将 FHA 的自然进程分为六型：A型，每个妊娠期间均未检测到（ND）；B 型，Band 在 18-21+6 周；C 型，Band 在 18-21+6 周和 28-31+6 周；D 型，BF 在 18-21+6 周；E 型，BF 在 18-21+6 周和 Band 在 28-31+6 周；F 型，BF 在 18-21+6 周和 28-31+6 周。

结果

BF、Band 和 ND 在 18-21+6 周时分别为 83.5%、15.5%和 1.0%，在 28-31+6 周时分别为 8.8%、15.5%和 75.7%，在 35 周后分别为 0、0 和 100%。A型占 1.0%，B 型占 13.6%，C 型占 1.9%，D 型占 61.2%，E 型占 13.6%，F 型占 8.7%。