Department of Obstetrics, Leiden University Medical Center, The Netherlands.
Am J Obstet Gynecol. 2011 Dec;205(6):574.e1-5. doi: 10.1016/j.ajog.2011.06.090. Epub 2011 Jun 29.
Sonography-based Automated Volume Count (SonoAVC) is an automated, operator-independent, 3-dimensional ultrasound technique. The study goal was to assess agreement between SonoAVC and Virtual Organ Computer-aided AnaLysis (VOCAL) for bladder volume measurements and fetal urine production (FUP).
This was a prospective study of recipient bladder volumes in twin-to-twin transfusion syndrome acquired with SonoAVC and VOCAL every 2 minutes during 30 minutes before and 24 hours after laser coagulation. FUP formulas: (V(2) - V(1)) × 60/time interval in minutes; and slope of linear regression of ≥ 3 consecutively increasing bladder volumes × 60 minutes. Bland-Altman plots were used to compare techniques.
In 38 pregnancies, 560 bladder measurements were acquired. Mean FUP was 7.29 mL/h (95% confidence interval, 5.66-8.92) using SonoAVC and 6.79 mL/h (95% confidence interval, 5.16-8.42) using VOCAL (P = .14). Limits of agreement were -0.20 to 0.22 cm(3).
Fetal bladder volume and FUP measurements using SonoAVC were comparable to VOCAL. SonoAVC is operator independent, easy, and fast.
基于超声的自动容积计数（SonoAVC）是一种自动的、不依赖操作者的三维超声技术。本研究的目的是评估 SonoAVC 与虚拟器官计算机辅助分析（VOCAL）在膀胱容积测量和胎儿尿量（FUP）方面的一致性。
这是一项关于双胎输血综合征受者膀胱容积的前瞻性研究，使用 SonoAVC 和 VOCAL 每 2 分钟采集一次，在激光凝固前 30 分钟和后 24 小时进行。FUP 公式：（V(2) - V(1)) × 60 / 时间间隔（分钟）；≥ 3 个连续增加的膀胱容积的线性回归斜率 × 60 分钟。采用 Bland-Altman 图比较两种技术。
在 38 例妊娠中，共采集了 560 个膀胱测量值。使用 SonoAVC 的平均 FUP 为 7.29 mL/h（95%置信区间，5.66-8.92），使用 VOCAL 的为 6.79 mL/h（95%置信区间，5.16-8.42）（P =.14）。一致性界限为-0.20 至 0.22 cm(3)。
使用 SonoAVC 的胎儿膀胱容积和 FUP 测量值与 VOCAL 相当。SonoAVC 具有操作简便、快速、不依赖操作者等优点。
