Morell-Garcia Daniel, Bauça Josep M, García-Suquía Angela, Robles Juan, Barceló Bernardino, Fernández-Ballina Andrea, Carlos-Vicente Juan C
Clinical Chemistry Department, Hospital Universitari Son Espases, Carretera de Valldemossa 79, 07120, Palma de Mallorca, Spain; Instituto de Investigación Sanitaria de Palma (IdISPa), Palma de Mallorca, Spain.
Clinical Chemistry Department, Hospital Universitari Son Espases, Carretera de Valldemossa 79, 07120, Palma de Mallorca, Spain.
J Clin Anesth. 2016 Sep;33:306-8. doi: 10.1016/j.jclinane.2016.04.023. Epub 2016 May 18.
The green color in urine may suggest the presence of a severe pathology needing treatment. Many different potential causes of green urine have previously been reported. In our case, after ruling out other potential causes of green urine, it was suggested that the surgical manipulation of the paralytic ileum might have induced the reabsorption of the methylene blue which had been retained in the bowel (bezoar effect), even 96 hours after the nasogastric administration.
The staff should keep in mind this possible effect due to methylene blue to recognize early and avoid unnecessary laboratory tests.
This case report illustrates the significance of urine discoloration, sometimes indicate the presence of a systemic disorder and some rare cases, this phenomenon has no pathologic effects. To our knowledge, this is the first case report of a green urine by drug bezoar due methylene blue in children.