In preparation for potential patient surge and shortage of critical mechanical ventilators for hospitalized COVID-19 patients, a Northwell Health physician, a respiratory therapist, and a 3D printing bioengineer have successfully designed the protocol to turn the more common bilevel positive airway pressure (BiPAP) machine into a functional invasive mechanical ventilator, through a 3D printed adaptor they also designed to aid in the conversion.
As the health systems nationwide brace themselves for a potential increase in COVID-19 patients and New York Governor Andrew Cuomo calls for an increased supply of ventilators for hospitals statewide, a team led by Hugh Cassiere, MD, medical director for respiratory therapy services at North Shore University Hospital (NSUH) and Stanley John, NSUH’s director of respiratory therapy, developed a method to convert the non-invasive Philips Respironics V60 BiPAP machine into a pressure controlled ventilator for both patients with and without COVID-19 induced lung disease.
“Our hospitals are at the US epicenter of the coronavirus epidemic, and some of our COVID-19 patients require intensive care unit therapy and mechanical ventilators within minutes of being hospitalized,” says Cassiere in a release. One sleepless night, Cassiere thought of the fleet of unused BiPAP machines in the hospitals. “I knew we could develop a way to repurpose and convert these machines to save hundreds of lives.”
Currently, Northwell Health has an adequate supply of ventilators for its patients, and the health system is continually trying to obtain more ventilators to prepare for a likely surge. And while there are plans in place to handle a surge in patient volume, Northwell Health has a good supply of BiPAP machines across its 23 hospitals, and if faced with a surge when ventilators numbers do get low, it would be helpful to use these machines.
The key component to converting the BiPAP machine is a small, plastic T-piece adapter. Because of COVID-19 related supply change shortages, Cassiere and Stanley John collaborated with Northwell Health’s 3D Design and Innovation department, and together they designed and 3D printed a T-piece in a matter of days.
“We were able to imitate the design of the T-piece adapter and print the plastic-resin piece with our 3D printers,” says Todd Goldstein, PhD, director of 3D Design and Innovation at Northwell Health. “If the need arises, we would be able to print 150 adaptors in 24-hours.”
Cassiere, Goldstein, and Stanley John successfully tested the conversion of the BiPAP machine using the standard, non-3D printed adaptor for both COVID-19 and non-COVID-19 patients. They have also tested the 3D printed T-adaptor and have ramped up production to adopt the 3D printed adaptor clinically in the coming days.
Northwell’s partner, Formlabs Healthcare, is helping to print and host the 3D design files on its website.
In addition to the T-piece adaptor, modifications to the BiPAP machine include the addition of two high-efficiency particulate air (HEPA) filters at both ends of the oxygen hose to alleviate fears of spreading the virus. They are also recommending using a blind reservoir connected to the last HEPA filter in the circuit (see the video above; it is also available on Google Drive).