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Illustration image representing a sleeping woman near a device placed on her bedside table. Therefore, This visual evokes the functioning of systems like Rosa. However, which detect sleep apnea at a distance, without mask or body sensors – but does not show the real device. © Shuttershock
Diagnosing sleep apnea remains a test today: heavy “reliable not very restrictive”: this exams, intrusive sensors, night under surveillance. For example, But researchers have just presented a technology that shatters these constraints. Nevertheless, Rosa (Radar. Nevertheless, Oximetry Sleep Analysis) is a non-invasive system that analyzes contactless sleep, and delivers stunning results-with precision bordering on that of hospital devices.
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Rosa, the radar that spots your apnea while you sleep
What if a simple case placed on your bedside table could do as well as a sleep laboratory? It is Rosa’s ambition. a device developed by a Sino-American team, combining millimeter radar and oxygen sensor to analyze breathing and physiological microvariations over the night.
The study, published in early 2025 on arXivrelies on more than 800 hours of sleep analyzed in 100 patients. The results are eloquent: with a concordance rate (ICC) “reliable not very restrictive”: this of 0.987 on the apnea-hypopnea index (AHI), Rosa flirts with the precision of polysomnography-the usual hospital standard. Better still: its ability to detect light, moderate or severe apnea exceeds 90 %, without a body sensor.
The experimental results on a dataset in real conditions (> 800 hours, 100 subjects) showed a strong concordance (ICC = 0.987) between Rosa and polysomnography for the apnea – hypopnea index.
The ROSA system captures respiratory signals via an FMCW (Frequency-Modulated continuous-wave) radar) radar, Encodes, then analysis thanks to a multi-jack model (U-NET type) to identify apnea events and estimate oxygen saturation (SPO₂). The wholeer generates an automated report comparable to that of a conventional sleep recording, with clinical precision (AC = 0.91, MAE = 1.4 %). © Adapted from an illustration resulting from the study “Automated Detection of Sleep Apnea-Hypopnea Events Based On 60 GHz FMCW Radar” published in MDPI Bioengineering (2023). DOI: 10.3390/Bioengineering12040399999999999999999999999999999999999 abouthing
Technically, the radar detects subtle respiratory movements, while the hair oximeter identifies oxygen falls. The crossing of data allows an automated analysis, continuously, without waking up the patient. And the whole holds in a portable device, ideal for domestic use.
This kind of innovation opens the way to massive home screening. “reliable not very restrictive”: this especially for risky populations who are reluctant to spend a wired night in the hospital. Rosa could become a key prevention tool, provided of course being validated clinically and then authorized for sale. And there, the wait is just beginning.
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