Incidence of perioperative hypotension in patients undergoing transurethral resection of bladder tumor after oral 5-aminolevulinic acid administration: a retrospective multicenter cohort study.

The incidence of hypotension in patients undergoing TURBT after 5-ALA administration was 94.3%. The incidence of urgent ICU admission with prolonged hypotension was 1.1% in all patients with renal dysfunction. General anesthesia was significantly associated with intraoperative hypotension.