510(k) · Cleared
ClearedStudy Watch
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Verily Life Sciences, LLC · DXH Transmitters And Receivers, Electrocardiograph, Telephone
Cleared on Jan 17, 2019 as substantially equivalent to K171816 (AliveCor, Inc., 2017) after a 132-day review. Its family tree reaches back 7 generations to 1997. 3 later devices descend from it.
- Decided
- Jan 17, 2019
- Review
- 132 days
- Class
- Class II
- Product code
- DXH
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 7 generations to K963725 (1997). 14 ancestors in all, the oldest K920984 (1992). 3 later devices descend from it, 1 citing it directly.
- Root · 7 generations backK963725 Model CG-2206 Personal Electrocardiogram (Ecg) Transmitter Device…Card Guard, Ltd. · 1997
- 6 generations backK012223 CG-2211 Selfcheck Ecg TransmitterCard Guard Scientific Survival, Ltd. · 2001
- 5 generations backK042254 PMP4 Selfcheck EcgCard Guard Scientific Survival, Ltd. · 2005
- 4 generations backK122184 Ecg CheckCardiac Designs, LLC · 2013
- 3 generations backK140933 Alivecor Heart MonitorAliveCor, Inc. · 2014 · Recalled
- 2 generations backK142743 AliveCor Heart MonitorAliveCor, Inc. · 2015
- 1 generation backK171816 Kardia Band SystemAliveCor, Inc. · 2017
- This deviceK182456 Study WatchVerily Life Sciences, LLC · 2019
- Descendant · cites it directly · 2 of its ownK192415 Study Watch with Irregular Pulse MonitorVerily Life Sciences, LLC · 2020
- Descendant · 2 generations on · 0 of its ownK213357 Study Watch with Irregular Pulse Monitor (Home), Study Watch with…Verily Life Sciences, LLC · 2022
- Descendant · 2 generations on · 0 of its ownK213409 ZEUS System (Zio Watch)iRhythm Technologies, Inc. · 2022
Most influential descendants
Showing 3 of 3 · See all- K192415Study Watch with Irregular Pulse MonitorVerily Life Sciences, LLC · 2020 · cites it directly2descendants
- K213357Study Watch with Irregular Pulse Monitor (Home), Study Watch with Irregular Pulse MonitorVerily Life Sciences, LLC · 2022 · 2 generations on0descendants
- K213409ZEUS System (Zio Watch)iRhythm Technologies, Inc. · 2022 · 2 generations on0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −7 | K963725 | Model CG-2206 Personal Electrocardiogram (Ecg) Transmitter Device (Modified) | Card Guard, Ltd. | 1997 | — |
| −6 | K012223 | CG-2211 Selfcheck Ecg Transmitter | Card Guard Scientific Survival, Ltd. | 2001 | — |
| −5 | K042254 | PMP4 Selfcheck Ecg | Card Guard Scientific Survival, Ltd. | 2005 | — |
| −4 | K122184 | Ecg Check | Cardiac Designs, LLC | 2013 | — |
| −3 | K140933 | Alivecor Heart Monitor | AliveCor, Inc. | 2014 | 1 |
| −2 | K142743 | AliveCor Heart Monitor | AliveCor, Inc. | 2015 | — |
| −1 | K171816 | Kardia Band System | AliveCor, Inc. | 2017 | — |
| 0 (this device) | K182456 | Study Watch | Verily Life Sciences, LLC | 2019 | — |
| +1 | K192415 | Study Watch with Irregular Pulse Monitor | Verily Life Sciences, LLC | 2020 | — |
| +2 | K213357 | Study Watch with Irregular Pulse Monitor (Home), Study Watch with Irregular… | Verily Life Sciences, LLC | 2022 | — |
| +2 | K213409 | ZEUS System (Zio Watch) | iRhythm Technologies, Inc. | 2022 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1992 | 1 | 0 |
| 1997 | 1 | 0 |
| 1999 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2006 | 1 | 0 |
| 2014 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2020 | 1 | 0 |
| 2022 | 2 | 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 DXH? 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 DXH device
- #1 K243438 MEMO Patch M (MPT-E08R-UNC01)score 12.9 · 9 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 |
|---|---|---|---|
| * | K171816 | Kardia Band SystemSummary page 4…raph Transmitter and Receiver Classification: Class Il Medical Device Regulation Number: 21 CFR 870.2920 Product Code: DXH, DPS Predicate Device: AliveCor Kardia Band (K171816) Reason For Submission: New Device Indications for Use The Study Watch is intended to record, store, transfer, and display sin… | 2017 |
What descends from it? (3)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K192415 | Study Watch with Irregular Pulse Monitor | 2020 | 2 |
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 22 years and passes through 5 companies; a new generation was cleared every 2.8 years on median.
- 1 of the 14 ancestors has a recall of any class.
- Of its descendants, K192415 (Verily Life Sciences, LLC, 2020) has gone furthest, with 2 descendants of its own.
- 2 other devices also cite its predicate K171816.
How does its category compare?
All DXH devicesDXH Transmitters And Receivers, Electrocardiograph, Telephone: FDA decisions, review times, recalls and adverse event reports over 20 years. 2019, this device’s year, is highlighted.
FDA decisions per year · DXH
4in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · DXH
322in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · DXH
1in 2015
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · DXH
27in 2025
MAUDE reports naming product code DXH, 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 | 3 | 202 | 0 | 0 |
| 2008 | 7 | 41 | 4 | 0 |
| 2009 | 2 | — | 0 | 1 |
| 2010 | 2 | — | 0 | 4 |
| 2011 | 0 | — | 3 | 1 |
| 2012 | 1 | — | 0 | 1 |
| 2013 | 3 | 206 | 0 | 1 |
| 2014 | 6 | 186 | 0 | 1 |
| 2015 | 4 | 142 | 1 | 0 |
| 2016 | 1 | — | 0 | 5 |
| 2017 | 5 | 150 | 0 | 4 |
| 2018 | 4 | 294 | 0 | 0 |
| 2019 | 6 | 177 | 0 | 0 |
| 2020 | 5 | 141 | 0 | 5 |
| 2021 | 3 | 107 | 0 | 2 |
| 2022 | 4 | 150 | 0 | 6 |
| 2023 | 1 | — | 0 | 4 |
| 2024 | 0 | — | 0 | 2 |
| 2025 | 4 | 322 | 0 | 27 |
| 2026 | 1 | — | 1 | — |
What is it indicated for?
The Study Watch is intended to record, store, transfer, and display single-channel electrocardiogram (ECG) rhythms. The Study Watch is intended for use by healthcare professionals, adult patients (22 years or older) with known or suspected heart conditions, and health conscious individuals.
Indications for use read by OCR from a scanned FDA summary, so letters may be misread. Check the PDF before quoting it.
https://510kreport.com/device/K182456 · printed Nov 6, 2026
Cite this page
510(k) Report. “K182456: Study Watch.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K182456
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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