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    1. Surgical/Critical Care
    2. Med-Surg Equipment

    UChicago Medicine doctors see ‘remarkable’ success using ventilator alternatives to treat COVID-19

    April 29, 2020
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    Doctors at the University of Chicago Medicine are seeing “truly remarkable” results using high-flow nasal cannulas (HFNCs) rather than ventilators and intubation to treat some COVID-19 patients. HFNCs are non-invasive nasal prongs that sit below the nostrils and blow large volumes of warm, humidified oxygen into the nose and lungs.

    A team from UChicago Medicine’s emergency room took 24 COVID-19 patients who were in respiratory distress and gave them HFNCs instead of putting them on ventilators. The patients all fared extremely well, and only one of them required intubation after 10 days.

    The success we’ve had has been truly remarkable,” said Michael O’Connor, MD, Director of Critical Care Medicine.

    The HFNCs are often combined with prone positioning, a technique where patients lay on their stomachs to aid breathing. Together, they’ve helped UChicago Medicine doctors avoid dozens of intubations and have decreased the chances of bad outcomes for COVID-19 patients, said Thomas Spiegel, MD, Medical Director of UChicago Medicine’s Emergency Department.

    “The proning and the high-flow nasal cannulas combined have brought patient oxygen levels from around 40% to 80% and 90%, so it’s been fascinating and wonderful to see,” Spiegel said.

    Mechanical ventilation – the most common treatment for these patients thus far – involves inserting a breathing tube into the windpipe so a ventilator can pump air into the lungs. Using a ventilator or intubation as a last resort – an approach UChicago Medicine teams call “prevent the vent” – helps get COVID-19 patients out of the hospital intensive care unit and prevents harmful side effects caused by ventilators, such as lung injuries.

    “Avoiding intubation is key,” Spiegel said. “Most of our colleagues around the city are not doing this, but I sure wish other ERs would take a look at this technique closely.”

    This approach is not without risk, however. HFNCs blow air out and convert the COVID-19 virus into a fine spray in the air. To protect themselves from the virus, staff must have proper personal protective equipment (PPE), negative pressure patient rooms, and anterooms, which are rooms in front of the patient rooms where staff can change in and out of their safety gear to avoid contaminating others.

    UChicago Medicine’s Emergency Department recently doubled its number of anterooms, thereby doubling its capacity to give high-flow nasal cannula to patients. The main hospital also added negative pressure rooms on two floors, making it safer and easier to take care of COVID-19 patients.

    Since the first COVID-positive patient was admitted March 13, UChicago Medicine has successfully treated and discharged 297 patients with the virus. Even as the number of hospitalized COVID-19 patients has grown, doctors have managed ventilator usage. As of Wednesday, UChicago Medicine had 137 COVID-19 patients, but only 27 of them were on ventilators. The medical staff has avoided mechanical ventilation on 40% of patients, and extubated 50% of those who needed ventilators, O’Connor said.

    UChicago Medicine care teams got an early preview of how COVID-19 treatments were working in China and Italy from the university’s hospital affiliates in those countries. When the time came for the Hyde Park-based health system to start caring for COVID-19 patients, they had already concluded that steroids were an ineffective treatment. The UChicago Medicine teams opted to use less invasive approaches, such as HFNCs or helmet ventilators. For patients who did require mechanical ventilation, the goal was to get those people off the ventilator as soon as possible.

    O’Connor and Spiegel agree that the steps the city took to flatten the curve worked. At first, UChicago Medicine was doubling its cases every two-three days, leaving doctors terrified of running out of space, staff and equipment. Now that the doubling time of COVID-19 patients has slowed to approximately 12 days, it helps the hospital staff generate good outcomes.

    University of Chicago Medicine has the report.

    More COVID-19 coverage HERE.

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