510(k) · Cleared
ClearedKneevoice Cartilage Evaluation System (750-3600-001)
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Kneevoice, Inc. · DQD Stethoscope, Electronic
Cleared on Feb 6, 2026 as substantially equivalent to K991756 (Bio-Research Associates, Inc., 1999) and 1 other predicate after a 219-day review. Its family tree reaches back 5 generations to 1977.
- Decided
- Feb 6, 2026
- Review
- 219 days
- Class
- Class II
- Product code
- DQD
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 5 generations to K771653 (1977). 8 ancestors in all. No later device cites it as a predicate yet.
- Root · 5 generations backK771653 Electronic Stethoscope3M Company · 1977
- 4 generations backK961848 3M Littmann Electronic StethoscopeMinnesota Mining and Mfg. Co. · 1997
- 3 generations backK041934 3M Littmann Electronic Stethoscope, Model 30003M Company · 2004
- 2 generations backK050159 Modification to: 3M Littmann Electronic Stethoscope, Model 30003M Company · 2005
- 1 generation backK083903 3M Littmann Electronic Stethoscope, Model 32003M Company · 2009
- This deviceK252076 Kneevoice Cartilage Evaluation System (750-3600-001)Kneevoice, Inc. · 2026
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −5 | K771653 | Electronic Stethoscope | 3M Company | 1977 | — |
| −4 | K961848 | 3M Littmann Electronic Stethoscope | Minnesota Mining and Mfg. Co. | 1997 | — |
| −3 | K041934 | 3M Littmann Electronic Stethoscope, Model 3000 | 3M Company | 2004 | — |
| −2 | K050159 | Modification to: 3M Littmann Electronic Stethoscope, Model 3000 | 3M Company | 2005 | — |
| −1 | K083903 | 3M Littmann Electronic Stethoscope, Model 3200 | 3M Company | 2009 | — |
| 0 (this device) | K252076 | Kneevoice Cartilage Evaluation System (750-3600-001) | Kneevoice, Inc. | 2026 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1999 | 1 | 0 |
| 2001 | 1 | 0 |
| 2005 | 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 DQD? 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 DQD device
- #1 K200776 Eko COREscore 25.2 · 8 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (2)
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 |
|---|---|---|---|
| * | K991756 | 3 Channel Knee Electronic Amplified StethoscopeSummary page 5…1 CFR 807.92(a)(3) Predicate # Predicate Trade Name (Primary Product Code Predicate is listed first) K991756 Biomet 3-Channel Knee DQD Electronic Amplified Steth… | 1999 |
| * | K083903 | 3M Littmann Electronic Stethoscope, Model 3200Summary page 5…redicate is listed first) K991756 Biomet 3-Channel Knee DQD Electronic Amplified Stethoscope K083903 3M Littman 3200 Electronic DQD Stethoscope Device Descrip… | 2009 |
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 49 years and passes through 3 companies; a new generation was cleared every 7.1 years on median.
- None of the 8 ancestors has a recall.
How does its category compare?
All DQD devicesDQD Stethoscope, Electronic: FDA decisions, review times, recalls and adverse event reports over 20 years. 2026, this device’s year, is highlighted.
FDA decisions per year · DQD
3in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · DQD
89in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · DQD
No recall names DQD since 2007.
Adverse event reports per year · DQD
1in 2024
MAUDE reports naming product code DQD, 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 | 2 | — | 0 | 0 |
| 2008 | 1 | — | 0 | 0 |
| 2009 | 6 | 161 | 0 | 0 |
| 2010 | 1 | — | 0 | 0 |
| 2011 | 4 | 107 | 0 | 1 |
| 2012 | 2 | — | 0 | 0 |
| 2013 | 5 | 70 | 0 | 1 |
| 2014 | 0 | — | 0 | 0 |
| 2015 | 2 | — | 0 | 0 |
| 2016 | 3 | 250 | 0 | 0 |
| 2017 | 4 | 109 | 0 | 0 |
| 2018 | 4 | 131 | 0 | 0 |
| 2019 | 4 | 262 | 0 | 0 |
| 2020 | 6 | 104 | 0 | 0 |
| 2021 | 4 | 137 | 0 | 0 |
| 2022 | 8 | 203 | 0 | 0 |
| 2023 | 10 | 132 | 0 | 0 |
| 2024 | 4 | 153 | 0 | 1 |
| 2025 | 3 | 89 | 0 | 0 |
| 2026 | 6 | 236 | 0 | — |
What is it indicated for?
The KneeVoice Cartilage Evaluation System is intended to be used as a part of physical assessment of a patient by healthcare professional for diagnostic decision support in clinical settings. It is intended to be used by a physician as a noninvasive tool to amplify and record distinct sounds (vibrations) within the patellofemoral section of the knee.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K252076 · printed Nov 4, 2026
Cite this page
510(k) Report. “K252076: Kneevoice Cartilage Evaluation System (750-3600-001).” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K252076
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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