510(k) · Cleared
ClearedLiqua-Sonic Gel
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Chester Labs, Inc. · GYB Media, Electroconductive
Cleared on Mar 14, 1985 after a 311-day review. FDA has not posted a summary or statement for it, so its predicates are not known. 1 later device descends from it.
- Decided
- Mar 14, 1985
- Review
- 311 days
- Class
- Class II
- Product code
- GYB
- Recalls
- None
- Predicates
- 0
1 later device descends from it, 1 citing it directly.
- This deviceK841871 Liqua-Sonic GelChester Labs, Inc. · 1985
- Descendant · cites it directly · 0 of its ownK102637 Dynarex Ultrasound GelDynarex Corporation · 2011
Most influential descendants
Showing 1 of 1 · See all- K102637Dynarex Ultrasound GelDynarex Corporation · 2011 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K841871 | Liqua-Sonic Gel | Chester Labs, Inc. | 1985 | — |
| +1 | K102637 | Dynarex Ultrasound Gel | Dynarex Corporation | 2011 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2011 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in GYB? 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 GYB device
- #1 K243749 Jmoon Conductive Gelscore 10.9 · 7 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against?
FDA has not posted a summary or statement for it, so its predicates are not known.
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 |
|---|---|---|---|
| K102637 | Dynarex Ultrasound Gel | 2011 | 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?
- Of its descendants, K102637 (Dynarex Corporation, 2011) has gone furthest, with 0 descendants of its own.
How does its category compare?
All GYB devicesGYB Media, Electroconductive: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · GYB
1in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · GYB
101in 2022
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · GYB
1in 2021
Class I (1 since 2007) Class II/III not classified
Adverse event reports per year · GYB
2in 2025
MAUDE reports naming product code GYB, 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 | 0 | — | 0 | 9 |
| 2008 | 0 | — | 0 | 4 |
| 2009 | 0 | — | 0 | 3 |
| 2010 | 0 | — | 0 | 7 |
| 2011 | 0 | — | 0 | 10 |
| 2012 | 1 | — | 0 | 15 |
| 2013 | 0 | — | 0 | 2 |
| 2014 | 0 | — | 0 | 5 |
| 2015 | 0 | — | 0 | 3 |
| 2016 | 1 | — | 0 | 3 |
| 2017 | 1 | — | 0 | 4 |
| 2018 | 0 | — | 0 | 2 |
| 2019 | 1 | — | 0 | 3 |
| 2020 | 3 | 198 | 0 | 2 |
| 2021 | 2 | — | 1 (1) | 4 |
| 2022 | 3 | 101 | 0 | 4 |
| 2023 | 1 | — | 0 | 6 |
| 2024 | 0 | — | 0 | 4 |
| 2025 | 1 | — | 0 | 2 |
| 2026 | 0 | — | 0 | — |
https://510kreport.com/device/K841871 · printed Nov 4, 2026
Cite this page
510(k) Report. “K841871: Liqua-Sonic Gel.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K841871
Report an extraction error
Are you the manufacturer?
Record history
- FDA decision record loaded May 2, 2026
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026