Grasso M, Caruso R P, Phillips C K
Rev Urol. 2001 Winter;3(1):42-51.
Ureteropelvic junction (UPJ) obstruction describes various causes of impaired drainage at the UPJ. Regardless of the cause, the end result is the same: impedance in the normal flow of urine from the renal pelvis into the proximal ureter, resulting in caliectasis and hydronephrosis. This may lead to progressive deterioration of renal function and, thus, often requires intervention to relieve the obstruction and restore the normal flow of urine. Defining the pertinent anatomy, the degree of obstruction, and differential renal function is key to determining whether and when intervention is necessary.
肾盂输尿管连接部（UPJ）梗阻描述了UPJ处引流受损的各种原因。无论病因如何，最终结果都是相同的：尿液从肾盂正常流入近端输尿管受到阻碍，导致肾盏扩张和肾积水。这可能会导致肾功能逐渐恶化，因此通常需要进行干预以解除梗阻并恢复尿液的正常流动。明确相关解剖结构、梗阻程度和患侧肾功能对于确定是否以及何时需要进行干预至关重要。
