510(k) · Cleared
ClearedRX-1 Sleep
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Vivaquant, Inc. Dba Rhythm Express · MNR Ventilatory Effort Recorder
Cleared on Jun 22, 2026 as substantially equivalent to K244027 (Huxley Medical, 2025) after a 270-day review. Its family tree reaches back 13 generations to 1992.
- Decided
- Jun 22, 2026
- Review
- 270 days
- Class
- Class II
- Product code
- MNR
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 13 generations to K913396 (1992). 53 ancestors in all, the oldest K830295 (1983). No later device cites it as a predicate yet.
- Root · 13 generations backK913396 Cannula Style ThermocouplesPro-Tech, Inc. · 1992
- 9 generations between
- 3 generations backK220095 ANNE SleepSibel, Inc. · 2022
- 2 generations backK240285 Huxley SANSA Home Sleep Apnea Test (1000-00)Huxley Medical · 2024
- 1 generation backK244027 Sansa HsatHuxley Medical · 2025
- This deviceK253148 RX-1 SleepVivaquant, Inc. Dba Rhythm Express · 2026
Show all 13 generations
- Root · 13 generations backK913396 Cannula Style ThermocouplesPro-Tech, Inc. · 1992
- 12 generations backK982293 Pressure Transducer Airflow SensorPro-Tech Services, Inc. · 1998
- 11 generations backK020607 Sleepflo, Model 101501Biomec, Inc. · 2002
- 10 generations backK030379 Aplab, Model 801D0030Sector Medical Corp. · 2003
- 9 generations backK041904 Compass F10 SystemMedcare Flaga · 2004
- 8 generations backK073682 Embletta GoldEmbla Systems, Inc. · 2008 · Recalled
- 7 generations backK122516 Embletta MPREmbla Systems · 2013 · Recalled
- 6 generations backK161579 Watch-PAT200UItamar Medical, Ltd. · 2017
- 5 generations backK180775 Watch-PAT300Itamar Medical, Ltd. · 2018
- 4 generations backK183559 WatchPAT ONEItamar Medical, Ltd. · 2019
- 3 generations backK220095 ANNE SleepSibel, Inc. · 2022
- 2 generations backK240285 Huxley SANSA Home Sleep Apnea Test (1000-00)Huxley Medical · 2024
- 1 generation backK244027 Sansa HsatHuxley Medical · 2025
- This deviceK253148 RX-1 SleepVivaquant, Inc. Dba Rhythm Express · 2026
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −13 | K913396 | Cannula Style Thermocouples | Pro-Tech, Inc. | 1992 | — |
| −12 | K982293 | Pressure Transducer Airflow Sensor | Pro-Tech Services, Inc. | 1998 | — |
| −11 | K020607 | Sleepflo, Model 101501 | Biomec, Inc. | 2002 | — |
| −10 | K030379 | Aplab, Model 801D0030 | Sector Medical Corp. | 2003 | — |
| −9 | K041904 | Compass F10 System | Medcare Flaga | 2004 | — |
| −8 | K073682 | Embletta Gold | Embla Systems, Inc. | 2008 | 1 |
| −7 | K122516 | Embletta MPR | Embla Systems | 2013 | 1 |
| −6 | K161579 | Watch-PAT200U | Itamar Medical, Ltd. | 2017 | — |
| −5 | K180775 | Watch-PAT300 | Itamar Medical, Ltd. | 2018 | — |
| −4 | K183559 | WatchPAT ONE | Itamar Medical, Ltd. | 2019 | — |
| −3 | K220095 | ANNE Sleep | Sibel, Inc. | 2022 | — |
| −2 | K240285 | Huxley SANSA Home Sleep Apnea Test (1000-00) | Huxley Medical | 2024 | — |
| −1 | K244027 | Sansa Hsat | Huxley Medical | 2025 | — |
| 0 (this device) | K253148 | RX-1 Sleep | Vivaquant, Inc. Dba Rhythm Express | 2026 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1983 | 1 | 0 |
| 1986 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 3 | 0 |
| 2004 | 2 | 0 |
| 2008 | 3 | 0 |
| 2011 | 1 | 0 |
| 2014 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in MNR? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new MNR device
- #1 K244027 Sansa Hsatscore 18.1 · 12 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (1)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K244027 | Sansa HsatSummary page 5…Panel: Regulatory Class: Class 2 Product Code: MNR III. PREDICATE AND REFERENCE DEVICES Predicate device: Huxley SANSA Home Sleep Apnea Test (K244027). This predicate device has not been subject to a design-related recall. Reference device: NightOwl (K213463). IV. DEVI… | 2025 |
| † | K213463 | NightOwl | 2021 |
What descends from it?
No later submission names this one as a predicate yet.
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 34 years and passes through 11 companies; a new generation was cleared every 2.0 years on median.
- 4 of the 53 ancestors have a recall of any class.
- 1 other device also cites its predicate K244027.
How does its category compare?
All MNR devicesMNR Ventilatory Effort Recorder: FDA decisions, review times, recalls and adverse event reports over 20 years. 2026, this device’s year, is highlighted.
FDA decisions per year · MNR
10in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · MNR
165in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · MNR
1in 2021
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · MNR
43in 2025
MAUDE reports naming product code MNR, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 6 | 124 | 2 | 1 |
| 2008 | 14 | 118 | 0 | 0 |
| 2009 | 8 | 89 | 1 | 0 |
| 2010 | 0 | — | 0 | 1 |
| 2011 | 9 | 90 | 1 | 1 |
| 2012 | 1 | — | 0 | 1 |
| 2013 | 4 | 161 | 0 | 0 |
| 2014 | 2 | — | 0 | 1 |
| 2015 | 4 | 229 | 0 | 4 |
| 2016 | 3 | 281 | 0 | 10 |
| 2017 | 4 | 275 | 0 | 4 |
| 2018 | 3 | 147 | 0 | 2 |
| 2019 | 8 | 383 | 0 | 3 |
| 2020 | 5 | 192 | 0 | 5 |
| 2021 | 3 | 137 | 1 | 5 |
| 2022 | 7 | 266 | 0 | 4 |
| 2023 | 6 | 183 | 0 | 13 |
| 2024 | 6 | 217 | 0 | 11 |
| 2025 | 10 | 165 | 0 | 43 |
| 2026 | 5 | 227 | 1 | — |
What is it indicated for?
RX-1 Sleep is a Software as a Medical Device (SaMD) to aid in the evaluation of sleep-related breathing disorders in adults suspected of having sleep apnea. RX-1 Sleep is a cloud-based algorithm that analyzes inputs provided by two FDA cleared devices intended for clinical and home use: a) the Rhythm Express RX-1 mini and b) a Viatom pulse oximeter. Biophysical parameters provided by RX-1 Sleep are recorded and stored for presentation to a Healthcare Professional (HCP). RX-1 Sleep is intended for use under the direction of a Healthcare Professional.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K253148 · printed Nov 3, 2026
Cite this page
510(k) Report. “K253148: RX-1 Sleep.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 3, 2026. https://510kreport.com/device/K253148
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Record history
- FDA decision record loaded Oct 30, 2026
- Summary read Oct 30, 2026 (extraction version 2d9447fa9ea4)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026