Ukimura O, Kojima M, Inui E, Ochiai A, Naya Y, Kawauchi A, Watanabe H
Department of Urology, Kyoto Prefectural University of Medicine, Japan.
J Urol. 1998 Oct;160(4):1459-62.
In healthy children as well as those with urinary disturbance we determined ultrasound estimated bladder weight with the aim of revealing its possible usefulness as a measure of bladder compliance.
We measured ultrasound estimated bladder weight in 71 healthy children with a mean age of 10.3 years, and determined a standard value. A total of 82 patients with a mean age of 9.6 years with urinary disturbance also underwent ultrasound estimated bladder weight measurement as well as conventional urological examinations, including filling cystometry.
In healthy children ultrasound estimated bladder weight increased with age, showing a significant linear correlation (r = 0.80, p < 0.0001). Using the formula for linear correlation, 0.86 x patient age + 6.9 gm., we obtained an age matched estimated weight. In 82 patients the percent deviation of the estimate from age matched values was calculated using the formula, (measured ultrasound estimated bladder weight -age matched ultrasound estimated bladder weight)/age matched ultrasound estimated bladder weight x 100, and then correlated with bladder compliance. In 75 of 77 patients (97%) with compliance of 10 ml./cm. water or more the estimate was within 100% deviation. In contrast, 4 of 5 patients (80%) with a low compliant bladder (less than 10 ml./cm. water) had an ultrasound estimated bladder weight greater than 100% deviation. When the estimate was within 100% deviation, all but 1 patient (75 of 76, 98.7%) had compliance of 10 ml./cm. water or more compared to 33.3% (2 of 6) of those with an estimate greater than 100% deviation. As a result, with the use of a cutoff value of 100% deviation ultrasound estimated bladder weight predicted a low compliant bladder with a diagnostic accuracy as high as 96.3% (79 of 82 cases).
Ultrasound estimated bladder weight may be used to evaluate bladder compliance in children. It seems to be a suitable noninvasive urodynamic test in children with suspected urodynamic abnormalities.
在健康儿童以及存在排尿障碍的儿童中，我们测定了超声估算的膀胱重量，目的是揭示其作为膀胱顺应性指标的潜在用途。
我们测量了71名平均年龄为10.3岁的健康儿童的超声估算膀胱重量，并确定了一个标准值。共有82名平均年龄为9.6岁的排尿障碍患者也接受了超声估算膀胱重量测量以及包括充盈性膀胱测压在内的传统泌尿外科检查。
在健康儿童中，超声估算膀胱重量随年龄增加，呈现显著的线性相关性（r = 0.80，p < 0.0001）。使用线性相关公式0.86×患者年龄 + 6.9克，我们得出了年龄匹配的估算重量。在82名患者中，使用公式（测量的超声估算膀胱重量 - 年龄匹配的超声估算膀胱重量）/年龄匹配的超声估算膀胱重量×100计算估算值与年龄匹配值的偏差百分比，然后将其与膀胱顺应性相关联。在顺应性为10毫升/厘米水柱或更高的77名患者中的75名（97%）中，估算值的偏差在100%以内。相比之下，5名膀胱顺应性低（低于10毫升/厘米水柱）的患者中有4名（80%）超声估算膀胱重量的偏差大于100%。当估算值的偏差在100%以内时，除1名患者外的所有患者（76名中的75名，98.7%）的顺应性为10毫升/厘米水柱或更高，而估算值偏差大于100%的患者中这一比例为33.3%（6名中的2名）。结果，使用100%偏差的临界值，超声估算膀胱重量预测低顺应性膀胱的诊断准确率高达96.3%（82例中的79例）。
超声估算膀胱重量可用于评估儿童的膀胱顺应性。它似乎是疑似尿动力学异常儿童合适的无创尿动力学检查。
