Urospasm.
This article theorizes that acute reversible narrowing can occur in the calyx/infundibular regions of the kidney. This narrowing could result from a spasm of the urinary tract smooth muscle analogous to spasms of other tubular structures containing smooth muscle (bronchi, esophagus, peripheral arteries, and coronary arteries). The spasm in the calyx/infundibular region could help explain the phenomenon of the acute renal failure that can occur with minimal change disease.
D058186:Acute Kidney Injury / Q000209:etiology* / Q000503:physiopathology; D000818:Animals; D006801:Humans; D007684:Kidney Tubules / Q000503:physiopathology; D009119:Muscle Contraction; D011312:Pressure; D051381:Rats; D013035:Spasm