Here is a sensor that’s long been overdue. Designed to “hear” respiratory flows in the upper airway, this prototype from the Masimo Corporation has already shown great results is the latest series of studies:
Masimo reported that three new independent studies, including one presented the recent International Anesthesiology Research Society (IARS) Clinical & Scientific Congress in Orlando, concluded that Masimo Acoustic Respiratory Monitoring technology (ARM) is “at least as accurate as capnometry” and “significantly more reliable” for monitoring respiration in spontaneously breathing patients.
In the study released at the recent IARS, conducted by M. R. Macknet, MD and a team of researchers at Loma Linda University’s Department of Anesthesiology, fifteen pediatric PACU patients were monitored with Masimo’s ARM technology consisting of an adhesive bioacoustic sensor applied to the patient’s neck and connected to a breathing frequency monitor prototype. In addition, a nasal cannula was placed, secured with tape, and connected to a capnometer. The study showed that “premature cannula dislodgement occurred in 14 patients” in less that 20 minutes, while “in no patient was the bioacoustic sensor dislodged before the end of the stay in the PACU.”
“This data shows the relative ease and high incidence of capnometer cannula dislodgement compared to the new bioacoustic sensor,” the researchers commented. “In clinical settings where continuous and reliable monitoring of spontaneous respiration is important, the new bioacoustic sensor provides significantly greater patient connection time, which should lead to significantly more reliable monitoring of respiration rate.”
In two studies released in January at the 2007 Society for Technology in Anesthesiology annual meeting, researchers monitored ten postoperative adult ICU and six pediatric PACU patients in separate studies with Masimo’s ARM technology as well as a nasal cannula connected to a capnometer. They concluded that Masimo’s new bioacoustic respiratory sensor “demonstrates accuracy for respiratory rate monitoring as good as capnometry” and that the device “offers multiple benefits over existing devices and has a potential to improve monitoring in a general care setting…”
Masimo expects to combine its Masimo Rainbow SET Read-Through Motion and Low Perfusion pulse oximetry with Masimo ARM technology as part of a general floor monitoring solution designed to increase patient safety and heed the growing call to find ways reduce unnecessary deaths on general care floors. The combination of these two technologies will give hospitals a continuous and noninvasive way to accurately monitor a patient’s oxygenation and ventilation during patient-controlled analgesia, consistent with the new recommendations from the Anesthesia Patient Safety Foundation (APSF)…
The technology is currently undergoing additional clinical and engineering testing and is expected to be introduced at Alpha Sites in late 2007.
Press release: New Research Shows Masimo Acoustic Respiratory Monitoring Technology Provides “Significantly More Reliable Monitoring of Respiration Rate” …
Study: Accuracy of a Novel Bioacoustic Sensor in Pediatric and Adult Postoperative Patients. (.pdf)