良性前列腺增生症可导致膀胱颈出口梗阻,尿液排出受阻从而引起持续性残余尿量增多~([1])。膀胱内积存大量的沉渣、脱落上皮细胞及细菌,膀胱过度膨胀使膀胱壁变薄、缺血,免疫力下降,降低了膀胱自身的抗菌能力,容易引起尿路感染~([2-3])。残余尿量多少与发生泌尿系感染的临床界值,目前尚无统一标准。为探讨尿路感染与残余尿量的关系,我们对112例前列腺增生(benign prostatic hyperplasia,BPH)患者残余尿量进行超声 Benign prostatic hyperplasia can lead to obstruction of the bladder neck outlet, obstruction of urine resulting in persistent residual urine increased ~ ([1]). Bladder accumulation of a large number of sediment, shedding of epithelial cells and bacteria, bladder over-expansion of the bladder wall thinning, ischemia, decreased immunity, reducing the bladder’s own antibacterial capacity, easily lead to urinary tract infection ~ ([2-3]) . There is no uniform standard for the residual urine volume and the clinical value of urinary tract infection. To investigate the relationship between urinary tract infection and residual urine volume, we measured the residual urine volume in 112 patients with benign prostatic hyperplasia (BPH)