Nonvisualization of intravenous methylene blue in patients with clinically normal renal function
This article discusses the phenomenon where methylene blue, a diagnostic dye, was not visualized in the urine of two patients with clinically normal renal function after intravenous injection. This lack of visualization is due to methylene blue’s metabolism into a colorless compound called leukomethylene blue, which cannot be detected in
June 26, 2025
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