510(k) · Cleared
Clearedcircul™ pro Ring
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Bodimetrics, LLC · DQA Oximeter
Cleared on Aug 29, 2023 as substantially equivalent to K211407 (Belun Technology Company Limited, 2021) after a 475-day review. Its family tree reaches back 6 generations to 2000. 1 later device descends from it.
- Decided
- Aug 29, 2023
- Review
- 475 days
- Class
- Class II
- Product code
- DQA
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 6 generations to K001085 (2000). 1 later device descends from it, 1 citing it directly.
- Root · 6 generations backK001085 Modification to Onyx, Finger Clip Pulse Oximeter, Model 9500Nonin Medical, Inc. · 2000
- 5 generations backK051107 Onyx II Finger Pulse Oximeter, Model 9550Nonin Medical, Inc. · 2005
- 4 generations backK070371 Fingertip Pulse Oximeter MD300CBeijing Choice Electronic Technololgy Co., Ltd. · 2007
- 3 generations backK180174 Belun RingBelun Technology Company Limited · 2018
- 2 generations backK191417 Belun RingBelun Technology Company Limited · 2019
- 1 generation backK211407 Belun Ring BLR-100XBelun Technology Company Limited · 2021
- This deviceK221361 circul™ pro RingBodimetrics, LLC · 2023
- Descendant · cites it directly · 0 of its ownK234110 Belun Ring BLR-200 (BLR-200)Belun Technology Company Limited · 2024
Most influential descendants
Showing 1 of 1 · See all- K234110Belun Ring BLR-200 (BLR-200)Belun Technology Company Limited · 2024 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −6 | K001085 | Modification to Onyx, Finger Clip Pulse Oximeter, Model 9500 | Nonin Medical, Inc. | 2000 | — |
| −5 | K051107 | Onyx II Finger Pulse Oximeter, Model 9550 | Nonin Medical, Inc. | 2005 | — |
| −4 | K070371 | Fingertip Pulse Oximeter MD300C | Beijing Choice Electronic Technololgy Co., Ltd. | 2007 | — |
| −3 | K180174 | Belun Ring | Belun Technology Company Limited | 2018 | — |
| −2 | K191417 | Belun Ring | Belun Technology Company Limited | 2019 | — |
| −1 | K211407 | Belun Ring BLR-100X | Belun Technology Company Limited | 2021 | — |
| 0 (this device) | K221361 | circul™ pro Ring | Bodimetrics, LLC | 2023 | — |
| +1 | K234110 | Belun Ring BLR-200 (BLR-200) | Belun Technology Company Limited | 2024 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2024 | 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 DQA? 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 DQA device
- #1 K221282 Empatica Health Monitoring Platformscore 20.1 · 38 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 |
|---|---|---|---|
| * | K211407 | Belun Ring BLR-100XSummary page 4…Product Code: DQA Class: II 4. Predicate Device Information Trade Name: Belun Ring BLR-100X 510(k) Number: K211407 Common Name: Oximeter Device Classification: Name: Oximeter Regulation No.: 21 CFR 870.2700… | 2021 |
| † | K191088 | Checkme O2 Pulse Oximeter | 2019 |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K234110 | Belun Ring BLR-200 (BLR-200) | 2024 | 0 |
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 23 years and passes through 4 companies; a new generation was cleared every 2.2 years on median.
- None of the 6 ancestors has a recall.
- Of its descendants, K234110 (Belun Technology Company Limited, 2024) has gone furthest, with 0 descendants of its own.
- 1 other device also cites its predicate K211407.
How does its category compare?
All DQA devicesDQA Oximeter: FDA decisions, review times, recalls and adverse event reports over 20 years. 2023, this device’s year, is highlighted.
FDA decisions per year · DQA
15in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · DQA
182in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · DQA
3in 2024
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · DQA
399in 2025
MAUDE reports naming product code DQA, 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 | 20 | 122 | 6 | 325 |
| 2008 | 22 | 97 | 5 | 312 |
| 2009 | 35 | 117 | 29 | 281 |
| 2010 | 29 | 127 | 4 | 185 |
| 2011 | 15 | 195 | 1 | 164 |
| 2012 | 14 | 120 | 0 | 322 |
| 2013 | 15 | 182 | 0 | 468 |
| 2014 | 11 | 175 | 2 | 1,124 |
| 2015 | 13 | 158 | 1 | 2,082 |
| 2016 | 14 | 246 | 0 | 1,775 |
| 2017 | 9 | 200 | 0 | 1,190 |
| 2018 | 18 | 260 | 32 | 694 |
| 2019 | 19 | 158 | 0 | 548 |
| 2020 | 15 | 126 | 0 | 426 |
| 2021 | 10 | 174 | 0 | 553 |
| 2022 | 20 | 265 | 0 | 478 |
| 2023 | 13 | 317 | 0 | 392 |
| 2024 | 14 | 285 | 3 | 545 |
| 2025 | 15 | 182 | 0 | 399 |
| 2026 | 8 | 187 | 0 | — |
What is it indicated for?
The circul™ pro Ring is a wireless, non-invasive, and stand-alone pulse oximeter intended to be used for spot-check and/or continuous data collection of oxygen saturation of arterial hemoglobin (Sp02) and pulse rate (PR) through the index finger in adult patients. It can be used in hospitals and home environments for up to twelve hours in non-motion and well perfused conditions. It is not intended for single-use and out-of-hospital transport use and does not have alarms.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K221361 · printed Nov 6, 2026
Cite this page
510(k) Report. “K221361: circul™ pro Ring.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K221361
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026