Research published in The Lancet Respiratory Medicine sheds new light on a common question: What is the safest, most effective way to support critically ill patients without the use of an invasive ventilator?
Christopher Yarnell, MD, PhD, an intensive care physician at Scarborough Health Network (SCN) in Ontario, Canada, led the international study, which is one of the largest analyses on noninvasive respiratory support. Results were recorded in the paper, “Noninvasive Respiratory Supports and Criteria for Intubation in Randomized Trials of Acute Hypoxemic Respiratory Failure: A Systematic Review and Network Meta-Analysis.”
The research team examined data from 44 clinical trials, including more than 9,700 patients, across the globe. Investigators focused on critically ill patients who had acute hypoxemic respiratory failure (AHRF), a condition in which a person’s lungs don’t provide enough oxygen to the body. AHRF accounts for approximately 15% of hospital admissions to intensive care units, they reported, and patients with severe cases may receive invasive ventilation, which carries its own complications of physical distress, infection, and lengthier recovery times.
Dr. Yarnell and his colleagues examined the four most widely used noninvasive ventilation methods:
- Continuous positive airway pressure (CPAP) delivers fixed air pressure through a secure face mask to keep airways open
- High-flow nasal cannula (HFNC) delivers warm, humid oxygen through the nose at amplified rates
- Bilevel noninvasive positive pressure ventilation (NIPPV) delivers alternating high and low pressures through a secure face mask to assist breathing
- Standard oxygen therapy delivers oxygen through a loose-fitting mask or nasal prongs at low-flow rates
Their findings revealed that the first three methods all reduce the need for invasive ventilation compared to standard oxygen therapy. Further, the researchers determined that CPAP and HFNC may improve survival rates.
“Our results show that these therapies are consistently helpful for patients with major breathing problems, regardless of whether intubation decisions are guided by judgment or specific criteria,” Dr. Yarnell said in a news release.
The study validates and increases confidence in these methods, he said, which supports safer, more effective decision-making for critically ill patients.
“This study reinforces what we see at the bedside every day — that thoughtful use of noninvasive respiratory support can meaningfully change a patient’s care journey,” said Martin Betts, MD, MBA, chief of staff at SHN.
In addition to its central findings, the study identified future research opportunities Dr. Yarnell said. For example, he is currently enrolling patients from SHN hospitals to assess the possible use cases for invasive ventilation in patients with AHRF.
