A Case of Carbon Monoxide Poisoning and Methemoglobinemia by Vehicle Exhaust

DOI 9 References Open Access
  • Kumagai Kazumi
    Advanced Medical Emergency & Critical Care Center, Yamaguchi University Hospital
  • Kaneda Kotaro
    Advanced Medical Emergency & Critical Care Center, Yamaguchi University Hospital
  • Inoue Takeshi
    Advanced Medical Emergency & Critical Care Center, Yamaguchi University Hospital
  • Tsuruta Ryosuke
    Advanced Medical Emergency & Critical Care Center, Yamaguchi University Hospital
  • Okabayashi Kiyoshi
    Advanced Medical Emergency & Critical Care Center, Yamaguchi University Hospital
  • Maekawa Tsuyoshi
    Advanced Medical Emergency & Critical Care Center, Yamaguchi University Hospital

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  • 排気ガス吸入によりメトヘモグロビン血症と一酸化炭素中毒を合併した１症例

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A 34-year-old man was admitted to our emergency center because of coma. He had been exposed to vehicle exhaust. His limbs were cyanotic and oxyhemoglobin saturation measured by pulseoximeter (SpO2) was 82%, although he was suspected of CO poisoning. Arterial blood gas analysis under 100% oxygen showed PaO2 348mmHg, PaCO2 32.2mmHg, pH 7.41, SaO2 98.2%, O2Hb 42.4%, COHb 32.6% and MetHb 24.2%. In a case of CO poisoning with cyanosis by vehicle exhaust, we would expect methemoglobinemia to exist simultaneously with CO hemoglobinemia.

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