Clinical evaluation of a novel ultrasound-based bladder volume monitor
Clinical evaluation of a novel ultrasound-based bladder volume monitor
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DOI：
10.1080/00365590510031165
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发表时间：
2005-09-01
影响因子：
--
通讯作者：
Djurhuus, JC
中科院分区：
文献类型：
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作者：
Kristiansen, NK;Nygaard, H;Djurhuus, JC
Objective.膀胱容量监测仪可用于监测泌尿科患者的膀胱容量和尿产量。因此，我们设计了一个超声波膀胱容量监测仪，并评估它在体外使用phantomy和在体内在一名男性志愿者。本研究的目的是对我们的监测器在泌尿科患者中进行更彻底的体内评价，以研究在广泛的膀胱体积范围内的生物学效应和差异。材料和方法。使用膀胱容量监测器检查了30名泌尿科患者，该监测器基于以圆形图案排列的7个相控阵超声换能器，以优化膀胱壁的检测。监测器设置为在两个连续的膀胱测压期间每30秒记录一次膀胱容量，输注速率为30和60 ml/min。使用回归分析对测量的容量进行分析，以确定容量增量（斜率）、偏移量（截距）和相关性（Pearson相关系数）。结果在男性患者中，输注和测量体积之间的中位相关系数为0.97，斜率为0.68 ml/ ml，因此校正因子约为1.47，无一般体积偏移。在女性患者中，小膀胱通常在监视器的视野之外。因此，相关系数和斜率分别为0.834（中位数）和0.43（平均值），而体积偏移通常为负。结论.对于男性患者的检查，膀胱容量监测仪的性能是足够的。然而，对于女性患者的检查，有必要对换能器单元进行微小的重新设计，以确保正确的操作。
Objective. Bladder volume monitors may be useful for surveillance of bladder volume and urine production in urologic patients. Therefore, we designed an ultrasonic bladder volume monitor and evaluated it in vitro using phantoms and in vivo in one male volunteer. The purpose of this study was to perform a more thorough in vivo evaluation of our monitor in urologic patients to investigate biological effects and variance over a wide range of bladder volumes. Material and methods. Thirty urologic patients of either gender were examined using the bladder volume monitor, which is based on seven phased array ultrasonic transducers arranged in a circular pattern to optimize detection of the bladder walls. The monitor was set up to record bladder volume every 30 s during two sequential cystometries with infusion rates of 30 and 60 ml/ min. The measured volumes were analyzed using regression analysis to determine volume increments ( slopes), offset volume ( intercept) and correlation ( Pearson's correlation coefficient). Results. In the male patients, the median correlation coefficient between the infused and measured volumes was 0.97 and the slope was 0.68 ml/ ml, thus warranting a correction factor of approximate to 1.47 with no general volume offset. In the female patients, small bladders were generally outside the field of view of the monitor. Consequently, the correlation coefficients and slopes were 0.834 ( median) and 0.43 ( mean), respectively, whereas volume offsets were generally negative. Conclusions. For examinations in male patients, the performance of the bladder volume monitor was adequate. However, for examinations in female patients, a minor redesign of the transducer unit is necessary to insure proper operation.