Patient's question:
Recently, my father has started experiencing a phenomenon he saw on TV again. He often goes to the bathroom at night while sleeping and rushes each time, always feeling like he can't fully empty his bladder. I know this must be due to benign prostatic hyperplasia. I would like to ask the doctor about the cause of this condition's blood loss. Why can't he completely empty his bladder even when he clearly has urine? Thank you.Doctor's answer:
The intravesical pressure rises, and the bladder mucosa can bulge outward from the weak points between muscle bundles to form diverticula. Bladder neck intestinal obstruction is relieved, and the bladder cannot completely empty urine during each urination. A small amount of urine remains in the bladder after urination. The presence of residual urine is the foundation for recurrent urinary tract infections and secondary stone formation. If not treated actively, the further expansion of benign prostatic hyperplasia will gradually relieve the control over the urethra, further increase the bladder's urination ability, gradually increase the amount of residual urine in the bladder, decrease the pressure in the bladder, allowing the urine to flow backward into the ureters and renal pelvis, leading to bilateral upper urinary tract obstruction. The increased pressure in the renal pelvis causes ischemic expansion of the renal parenchyma, resulting in the deterioration of kidney function.