Comprehensive analysis of perioperative hypotension in photodynamic diagnosis-assisted transurethral resection of bladder tumor with 5-aminolevulinic acid.

Renal function impairment and the other adverse effects of 5-aminolevulinic acid may be risk factors for severe hypotension. Mild or moderate hypotension may be caused by general anesthesia and severe hypotension may be caused by spinal anesthesia. To elucidate specific risk factors, further case-control studies are warranted.