Abstract:
A middle aged adult male patient was referred to our hospital with complaints of pain abdomen and vomiting
following consumption of bio-organic plant nutrient extract with a suicidal intent . On examination patient had pallor and
cyanosis of mucus membranes. Pulse oximetry showed oxygen saturation of 52% on room air. Even with
supplementation of 10L of oxygen, saturation increased to 66% and cyanosis failed to improve.Arterial blood gas
analysis was normal, thus suggesting a„ saturation gap‟.Methemoglobinemia was suspected based on above findings.
Patient was then started on IV preparation of methylene blue , following which patient showed a dramatic improvement
in saturation as monitored through pulse oximetry. On evaluation patient had signs and symptoms of hemolysis which
was later confirmed through laboratory investigations. Patient eventually improved with blood transfusion and supportive
treatment. Patient was discharged from hospital after 15 days without any sequelae
