Surgery Urethra & Penis e903d24f Which electrolyte abnormality occurs after TRUP: A Hypokalemia B Hyponatremia C Hyperkalemia D Hypernatremia High-Yield Explanation Ans. (b) HyponatremiaRef: Bailey 26th Edition, page 1349* Most common electrolyte abnormality during TURP is HYPONATREMIA due to water intoxication.