Jeng C J, Jou T J, Wang K G, Yang Y C, Lee Y N, Lan C C
Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
J Reprod Med. 1990 Jul;35(7):674-7.
Eleven hundred thirty-four pregnant women with reliable dates underwent ultrasound evaluation for amniotic fluid index (AFI) measurement with the modified four-quadrant technique. We found that from 13 weeks' gestation the AFI rose progressively until 26 weeks. From then to 38 weeks the AFI measurements demonstrated little variation. After 38 weeks the AFI appeared to decline gradually. In the third trimester the mean AFI was 16.0 +/- 4.8 cm; 5% of cases had an AFI less than or equal to 8 cm, and 5% had an AFI greater than or equal to 24 cm. These results confirm the reproducibility of the semiquantitative technique and suggest that in estimating amniotic fluid volume, AFI measurement may be a more appropriate means than measurement of the single largest pocket or subjective assessment. Serial AFI measurement would be an effective way of assessing fetal status throughout pregnancy.
1134名孕周明确的孕妇接受了超声检查，采用改良四象限技术测量羊水指数（AFI）。我们发现，从妊娠13周起，AFI逐渐上升，直至26周。从26周到38周，AFI测量值变化不大。38周后，AFI似乎逐渐下降。妊娠晚期平均AFI为16.0 +/- 4.8 cm；5%的病例AFI小于或等于8 cm，5%的病例AFI大于或等于24 cm。这些结果证实了半定量技术的可重复性，并表明在估计羊水量时，AFI测量可能比测量单个最大羊水池或主观评估更为合适。连续测量AFI将是评估整个孕期胎儿状况的有效方法。
