Engstrom J L, Ostrenga K G, Plass R V, Work B A
Department of Maternal Child Nursing, University of Illinois, Chicago.
Br J Obstet Gynaecol. 1989 Aug;96(8):987-91. doi: 10.1111/j.1471-0528.1989.tb03360.x.
The effect of maternal bladder volume on fundal height measurements was studied in 200 non-obese Black women between 16 and 42 weeks gestation. Fundal height measurements were obtained by the same examiner immediately before and immediately after each subject voided. Examiners were blinded to fundal height measurements and the amount of urine voided. Prevoid fundal height measurements were significantly larger than postvoid fundal height measurements. The differences between pre- and postvoid fundal height measurements varied from -2.8 to 4.6 cm (mean 0.63 cm, SD 1.26). Postvoid fundal height measurements were smaller than the prevoid measurements in 69.5% of the women, and 34.5% of the differences were greater than 1.0 cm. Women who had voided within 30 min before measurement had significantly smaller differences between pre- and postvoid fundal height measurements (n = 20, mean 0.16, SD 1.22) than women who voided more than 30 min before measurement (n = 179, mean 0.68, SD 1.27). These findings indicate that women should be instructed to void within 30 min before fundal height measurements are obtained.
对200名妊娠16至42周的非肥胖黑人女性研究了孕妇膀胱容量对宫高测量的影响。宫高测量由同一名检查者在每位受试者排尿前和排尿后立即进行。检查者对宫高测量值和排尿量不知情。排尿前的宫高测量值显著大于排尿后的宫高测量值。排尿前后宫高测量值的差异在-2.8至4.6厘米之间（平均0.63厘米，标准差1.26）。69.5%的女性排尿后宫高测量值小于排尿前，34.5%的差异大于1.0厘米。测量前30分钟内排尿的女性排尿前后宫高测量值的差异（n = 20，平均0.16，标准差1.22）显著小于测量前30分钟以上排尿的女性（n = 179，平均0.68，标准差1.27）。这些发现表明，应指导女性在获得宫高测量值前30分钟内排尿。
