Lindahl O A, Bäcklund T, Sjödin J G
Department of Biomedical Engineering, University Hospital of Northern Sweden, Umeå, Sweden.
Physiol Meas. 1995 Aug;16(3):169-79. doi: 10.1088/0967-3334/16/3/004.
A diagnostic method for the determination of obstructions in the pelvoureteral junction in patients with suspected idiopathic hydronephrosis is described and discussed. Two microtransducer catheters (MTCs) with infusion lumens are inserted under fluoroscopic control, one into the renal pelvis and the other in the perirenal space as a reference. The pressure values obtained are stored on a portable microcomputer system, carried by the ambulatory patients. Renal pelvic pressure, intra-abdominal pressure and differential pressure are calculated and displayed as time-pressure diagrams on a plotter. The pressures can be measured for long periods (3-24 h). Furthermore, steady state conditions can be evaluated during pelvic infusion of saline. The results from the pressure measurements are compared with clinical and radiological evaluations. Our results show that this method of long-term monitoring of intrapelvic pressure together with intra-abdominal pressure contributes to the evaluation of patients with suspected pelvoureteral obstructions and complements other methods in the preoperative investigation. However, this study reveals difficulties with measurements of intra-abdominal pressure. Carrying the equipment was not inconvenient for the patients.
本文描述并讨论了一种用于诊断疑似特发性肾积水患者肾盂输尿管连接处梗阻的方法。在荧光透视控制下，将两根带有输注管腔的微型换能器导管（MTC）插入，一根插入肾盂，另一根置于肾周间隙作为参照。获取的压力值存储在便携式微型计算机系统中，由门诊患者携带。计算肾盂压力、腹腔内压力和压差，并以时间-压力图的形式在绘图仪上显示。压力可长时间（3 - 24小时）测量。此外，在肾盂灌注生理盐水期间可评估稳态情况。将压力测量结果与临床和放射学评估结果进行比较。我们的结果表明，这种长期监测肾盂内压力以及腹腔内压力的方法有助于评估疑似肾盂输尿管梗阻的患者，并在术前检查中补充其他方法。然而，本研究揭示了腹腔内压力测量存在的困难。携带设备对患者来说并不不便。
