Topper A K, Holliday P J, Fernie G R
Centre for Studies in Aging, Sunnybrook Health Science Centre, Toronto, Ontario, Canada.
J Med Eng Technol. 1993 May-Jun;17(3):99-103. doi: 10.3109/03091909309016214.
We assessed the accuracy and ease of use of the BladderScan (BVI 2000) portable ultrasound-based bladder volume measurement device in a geriatric outpatient population. The Geriatric Continence Clinic nurse and physician each made 73 measurements on 36 subjects. Although the correlation coefficients between the true and ultrasound measurements were highly significant the mean differences were significantly different from zero. We suggest that, rather than considering the correlation coefficient, the accuracy required of the device should be described by a function of estimated versus true bladder volume. This function should vary depending on each particular decision-making process in which the estimate of volume is to be used. This instrument automatically estimates bladder volume once the user has completed the image creation and selection part of the process. The users in this study had difficulties with this imaging process. Possible ways in which the device's automated signal processing and volume calculation algorithms could be improved became evident during this study and are discussed.
我们评估了BladderScan（BVI 2000）便携式超声膀胱容量测量设备在老年门诊患者中的准确性和易用性。老年尿失禁诊所的护士和医生分别对36名受试者进行了73次测量。虽然真实测量值与超声测量值之间的相关系数非常显著，但平均差异显著不为零。我们建议，描述该设备所需的准确性时，不应考虑相关系数，而应根据估计膀胱容量与真实膀胱容量的函数来描述。该函数应根据使用容量估计值的每个特定决策过程而有所不同。一旦用户完成了该过程的图像创建和选择部分，该仪器会自动估计膀胱容量。本研究中的用户在这个成像过程中遇到了困难。在本研究中，该设备的自动信号处理和容量计算算法可能的改进方法变得明显，并进行了讨论。
