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Treatment options are limited for patients with respiratory failure due to coronavirus disease 2019. Conventional oxygen therapy and awake proning are options, but the use of high-flow nasal cannula and continuous positive airway pressure are controversial. There is an urgent need for effective rescue therapies. Our aim is to evaluate the role of inhaled nitric oxide 160 ppm as a possible rescue therapy in nonintubated coronavirus disease 2019 patients. Design Retrospective evaluation of coronavirus disease 2019 patients in respiratory distress receiving nitric oxide gas as rescue therapy. Setting Massachusetts General Hospital, between March 18, 2020, and May 20, 2020, during the local coronavirus disease 2019 surge. Patients Coronavirus disease 2019 patients at high risk for acute hypoxemic respiratory failure with worsening symptoms despite use of supplemental oxygen and/or awake proning. Interventions Patients received nitric oxide at concentrations of 160 ppm for 30 minutes twice per day via a face mask until resolution of symptoms, discharge, intubation, or the transition to comfort measures only. Measurements and Main Results Between March 18, 2020, and May 20, 2020, five patients received nitric oxide inhalation as a rescue therapy for coronavirus disease 2019 at Massachusetts General Hospital. All received at least one dosage. The three patients that received multiple treatments (ranging from five to nine) survived and were discharged home. Maximum methemoglobin concentration after 30 minutes of breathing nitric oxide was 2.0% (1.7-2.3%). Nitrogen dioxide was below 2 ppm. No changes in mean arterial pressure or heart rate were observed during or after nitric oxide treatment. Oxygenation and the respiratory rate remained stable during and after nitric oxide treatments. For two patients, inflammatory marker data were available and demonstrate a reduction or a cessation of escalation after nitric oxide treatment. Conclusions Nitric oxide at 160 ppm may be an effective adjuvant rescue therapy for patients with coronavirus disease 2019.
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?:doi
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10.1097/cce.0000000000000277
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Critical_care_explorations
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Rescue Treatment With High-Dose Gaseous Nitric Oxide in Spontaneously Breathing Patients With Severe Coronavirus Disease 2019.
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