正常胎儿咽、喉、气管的超声研究

目的探讨超声对不同孕周正常单胎胎儿咽、喉、气管的显像能力，确定产前超声检查胎儿咽、喉、气管的最佳时期。方法对401例孕16～36“周正常单胎胎儿进行产前超声检查，将胎儿按孕周的不同分为A、B、C、D4组。其中，A组为16～20周^＋6，共93例；B组为21～25周”，共104例；C组为26～30周^＋6，共108例；D组为31—36周^＋6，共96例。记录并统计每组超声清晰显示胎儿咽、喉、气管的例数。结果401例正常单胎胎儿，超声清晰显示胎儿咽、喉、气管的例数分别为241例（60．1％）、314例（78．3％）、329例（82．0％），超声对喉、气管的显示率高于咽（P〈0．05）。超声清晰显示胎儿咽，A组44．1％，B组76．9％，C 70．4％，D组45．8％；超声清晰显示胎儿喉，A组58．1％，B组95．2％，C组94．4％，D组61．5％；超声清晰显示胎儿气管，A组65．6％，B组97．1％，c组95．4％，D组66．7％。超声清晰显示胎儿咽、喉、气管B、C两组明显高于A、D两组（P〈0．05）。结论超声可清晰显示胎JL＂N、喉、气管，其中喉、气管的显示率高于咽，超声观察胎儿咽、喉、气管的最佳时期为21～30周^＋6。

The evaluation of pharynx,larynx and trachea in the healthy fetus by ultrasound

Objective To explore the images of the fetal respiratory tract by ultrasound in the patients with different fetal-normal gestational age and to identify the appropriate ultrasound for prenatal fetal pharynx,larynx and trachea.Methods Four hundreds and one subjects with 16-36 weeks of normal prenatal fetuses were assessed by ultrasound to record the number of the fetal pharynx,larynx and trachea.The patients were classified into four groups by fetal weeks: A group: 16-20th weeks;B group: 21-25th weeks;C grou...