Incidence of Methemoglobinemia in Cardiothoracic Surgery ICU Patients on Inhaled Nitric Oxide

Our findings suggest that treatment with iNO in adult cardiothoracic surgery ICU patients has a low risk of developing methemoglobinemia. In addition, the outcomes collected provide information regarding iNO use, adverse events, and health care resource use in clinical practice. Routine monitoring of methemoglobin levels may not be necessary for this patient population. Further research is needed to assess the true risk of methemoglobinemia and to establish the appropriate frequency of monitoring in this group.