Ventilator Technologies Sustain Critically Injured Patients
- Saturday, 01 January 2011
Consider this scenario: A soldier has been critically wounded in a sudden firefight in a remote region of Afghanistan. The soldier’s comrades attend to him and radio for help, but the soldier needs immediate medical expertise and treatment that is currently miles away.
The connection between medical support for soldiers on the battlefield and astronauts in space may not be immediately obvious. But when it comes to providing adequate critical care, “NASA and the military have very similar operational challenges,” says Shannon Melton of NASA contractor Wyle Integrated Science and Engineering. Melton works within Johnson Space Center’s Space Medicine Division, which supports astronaut crew health before, during, and after flight.
“In space, we have a limited number of care providers, and those providers are not always clinicians with extensive medical training. We have limited room to provide care, limited consumables, and our environment is not like that of a hospital,” she says.
The Space Medicine Division’s Advanced Projects Group works on combining the expertise of both clinicians and engineers to develop new capabilities that address the challenges of medical support in space, including providing care to distant patients. This field, called telemedicine, blends advanced communications practices and technologies with innovative medical devices and techniques to allow caregivers with limited or no medical experience to support a patient’s needs.
“NASA, just by its nature, has been doing remote medicine since the beginning of the Space Program,” says Melton, an engineer in the Advanced Projects Group.
Since part of NASA’s mandate is to transfer the results of its technological innovation for the benefit of the public, the Agency has worked with doctors and private industry to find ways to apply the benefits of space medicine on Earth. In one such case, a NASA partnership has resulted in new technologies that may improve the quality of emergency medicine for wounded soldiers on the battlefield and regular civilians.
Impact Instrumentation Inc. of West Caldwell, New Jersey, is an innovator and manufacturer of respiratory care products and instrumentation for military and civil emergency medicine. Recognizing a common interest in advancing critical care capabilities and the potential for mutual benefit from a sharing of resources, NASA and Impact entered into a Space Act Agreement (SAA).
“There was a common vision of what would be needed for an advanced healthcare system for the military as well as for a space station or deep space mission,” says George Beck, an engineer and former head of critical care development at Johnson who is now vice president of engineering and research for Impact. One project under the SAA focused on adapting Impact’s Model 754 medical ventilator for use in space by making it a remotely controlled device. (A medical ventilator mechanically moves air and oxygen in and out of the lungs of patients who are unable to breathe effectively on their own.) Impact used the resulting Model 754-AP ventilator to develop closedloop capabilities for the device, leading to clinical trials of a ventilator that could operate itself. “The way forward with space medicine is not just smaller devices but also smarter devices that run themselves in the absence of a skilled care provider,” says Beck.
Fully automated ventilators are still a technology for the future, but Impact’s work developing the Model 754-AP led to the company’s next generation ventilator technology: the Uni-Vent 731 Series of ventilators (which includes the EMV+ and Eagle II ventilators) for prehospital treatment and transport and in the hospital: intensive care units, emergency rooms and intrahospital transport. The 731 Series ventilators combine small size and energy efficiency with ease-of-use features designed for operators with minimal mechanical ventilation experience in any environment. The ventilators’ Smart Help display provides prompts to guide the caregiver in managing the patient and stabilizing a patient’s blood oxygen saturation and heart rate. A comprehensive alarm system and altitude compensation capabilities are among the other features that make Impact’s ventilators suitable for use just about anywhere, according to Beck.