Gross B, Petrikovsky B M, Forman F, Pellerito J, Mandel F S, Goldman M
Department of Radiology, North Shore University Hospital, Cornell University Medical College, Manhasset, New York, USA.
Acta Obstet Gynecol Scand. 1997 Nov;76(10):923-7. doi: 10.3109/00016349709034903.
The goal of the study was to measure the blood flow parameters of the fetal internal jugular vein during the second half of normal pregnancy using Doppler ultrasound.
Jugular blood flow was analyzed in 95 normal singleton fetuses between 20 and 42 weeks gestation. Color and pulsed Doppler ultrasound was used to obtain jugular venous waveforms at the level of the mid-neck. Peak velocities, ratios of velocities, and time-averaged maximum velocities were measured.
Jugular venous waveforms in healthy fetuses consist of three phases--the first forward peak occurs during ventricle systole; the second forward peak occurs during early diastole and the third peak occurs during atrial contraction. Forty-eight percent of the fetuses demonstrated absent flow during atrial contraction; 32% of fetuses demonstrated forward flow during atrial contraction and finally 20% of fetuses demonstrated flow reversal during atrial contraction.
The reported jugular venous profile may serve as a foundation for future studies of jugular blood flow in high risk fetuses.
本研究的目的是使用多普勒超声测量正常妊娠后半期胎儿颈内静脉的血流参数。
对95例妊娠20至42周的正常单胎胎儿的颈静脉血流进行分析。使用彩色和脉冲多普勒超声在颈部中段水平获取颈静脉波形。测量峰值速度、速度比值和时间平均最大速度。
健康胎儿的颈静脉波形由三个阶段组成——第一个正向峰值出现在心室收缩期；第二个正向峰值出现在舒张早期，第三个峰值出现在心房收缩期。48%的胎儿在心房收缩期无血流；32%的胎儿在心房收缩期有正向血流，最后20%的胎儿在心房收缩期出现血流逆转。
所报道的颈静脉血流情况可为未来高危胎儿颈静脉血流研究奠定基础。
