Bladder Volume Determination: A Comparison of Two-Dimensional and Three-Dimensional Transvaginal Ultrasound

膀胱容積的測定：經陰道2D超音波及3D立體超音波的比較

魏添勇(Wei Tien-Yung) ； 劉錦成(Law Kim Seng) ； 徐約翰(John Hsu)

《童綜合醫學雜誌》 9卷1期 (2015/06) Pp. 21-25

摘要

背景及目的：利用超音波檢查人體膀胱的尿液容積，比較3D立體超音波和傳統2D超音波，分析兩者準確度的比較。方法：本研究為前驅性研究，收集40位女性且事先已告知病患並同意檢查，先用2D超音波從陰道掃描膀胱容積後，再用3D超音波一樣由陰道再掃描膀胱容積，最後利用單次無菌導尿方式導出膀胱尿液並記錄實際體積，前後時間不超過10分鐘。2D超音波測量膀胱高度（H）及深度（D），利用Haylen公式：[5.9X高度（H）X深度（D）]得到估算容積。3D超音波則是掃描後，利用手繪方式畫出膀胱邊緣線，電腦則自動算出估算容積。結果：40位女性病患（平均51.3歲，從30到82歲）被掃描，實際膀胱容積為30毫升至590毫升，2D超音波測量膀胱容積平均誤差為正15.7%，相關係數為0.9。3D超音波測量膀胱容積平均誤差為負8.48%，相關係數為0.97。結論：雖然3D超音波在測量膀胱尿液容積比2D超音波較準確，但這兩者皆可以用來測量膀胱尿液容積，代替使用侵入性的單次導尿。而3D超音波測量結果較可能低估實際膀胱容積，相反的2D超音波卻是高估。

關鍵字

膀胱容積 ； 經陰道超音波 ； 2D超音波 ； 3D超音波

並列摘要

Background and purpose: To assess the accuracy of in vivo measurement of bladder volume using three-dimensional ultrasound (3DUS) and compare the results with those of two-dimensional US (2DUS). Methods: In this prospective study, 40 female patients (mean age 51.3 years, range 30-82 years) were scanned after obtaining informed consent. Each patient's bladder was initially scanned using the conventional transvaginal 2DUS method and then scanned using transvaginal 3DUS, and finally sterilized catheterization was used to obtain the true bladder volume. The 2DUS bladder volume was estimated by measuring the height and depth of the bladder and using the formula of Haylen et al. [estimated volume=(5.9 × height × depth)-14.6]. The 3DUS volume was masked using a manual determination of the bladder outline to isolate the bladder for volume measurement. The time from initial transvaginal US to final catheterization was less than 10 min. Results: The bladder volumes by catheterization varied from 30mL to 590mL. Using transvaginal 2DUS and 3DUS, the mean values of the error measurement estimation were 15.7% and-8.48%, respectively, and the correlation coefficients were 0.90 and 0.97, respectively. Conclusion: Although 3DUS is more accurate than 2DUS for estimating bladder volume, either method could be used instead of catheterization for scanning bladder urine volume. However, the 3D transvaginal scan volume generally underestimates the actual volume, whereas 2D generally overestimates it.

並列關鍵字

bladder volume ； transvaginal ultrasound ； two-dimensional ultrasound ； three-dimensional ultrasound