510(k) · Cleared
ClearedMedtronic Model 3487A Pisces-Quad Lead
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Medtronic Vascular · GZB Stimulator, Spinal-Cord, Implanted (Pain Relief)
Cleared on Mar 18, 1993 after a 225-day review. FDA has not posted a summary or statement for it, so its predicates are not known. 3 later devices descend from it.
- Decided
- Mar 18, 1993
- Review
- 225 days
- Class
- Class II
- Product code
- GZB
- Recalls
- None
- Predicates
- 0
3 later devices descend from it, 3 citing it directly.
- This deviceK923931 Medtronic Model 3487A Pisces-Quad LeadMedtronic Vascular · 1993
- Descendant · cites it directly · 1 of its ownK033016 Pisces Z Quad Lead Model, 3890, Pisces Z Quad Compact Lead Model…Medtronic Neurological · 2003
- Descendant · cites it directly · 0 of its ownK040568 Polyether Urethane Material Change in Neurostimulation LeadsMedtronic Vascular · 2004
- Descendant · cites it directly · 0 of its ownK964172 Medtronic Model 3991A, 3992A, 3993A, 3994A Leads or Transverse…Medtronic Vascular · 1997
Most influential descendants
Showing 3 of 3 · See all- K033016Pisces Z Quad Lead Model, 3890, Pisces Z Quad Compact Lead Model, 3891, Pisces Z Quad…Medtronic Neurological · 2003 · cites it directly1descendant
- K040568Polyether Urethane Material Change in Neurostimulation LeadsMedtronic Vascular · 2004 · cites it directly0descendants
- K964172Medtronic Model 3991A, 3992A, 3993A, 3994A Leads or Transverse Tripolar Leads or TTLMedtronic Vascular · 1997 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K923931 | Medtronic Model 3487A Pisces-Quad Lead | Medtronic Vascular | 1993 | — |
| +1 | K033016 | Pisces Z Quad Lead Model, 3890, Pisces Z Quad Compact Lead Model, 3891, Pisces… | Medtronic Neurological | 2003 | — |
| +1 | K040568 | Polyether Urethane Material Change in Neurostimulation Leads | Medtronic Vascular | 2004 | — |
| +1 | K964172 | Medtronic Model 3991A, 3992A, 3993A, 3994A Leads or Transverse Tripolar Leads… | Medtronic Vascular | 1997 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1997 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 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 GZB? 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 GZB device
- #1 K221376 Nalu Neurostimulation Systemscore 8.9 · 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?
FDA has not posted a summary or statement for it, so its predicates are not known.
What descends from it? (3)
3 later devices cite it directly; ranked here by how many devices descend from each in turn.
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, K033016 (Medtronic Neurological, 2003) has gone furthest, with 1 descendant of its own.
How does its category compare?
All GZB devicesGZB Stimulator, Spinal-Cord, Implanted (Pain Relief): FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · GZB
1in 2024
2026 to Oct 25, outlined.
Median 510(k) review, days · GZB
149in 2019
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · GZB
1in 2010
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · GZB
313in 2025
MAUDE reports naming product code GZB, 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 | 201 |
| 2008 | 1 | — | 1 | 68 |
| 2009 | 3 | 62 | 0 | 59 |
| 2010 | 1 | — | 1 | 157 |
| 2011 | 4 | 67 | 0 | 471 |
| 2012 | 2 | — | 0 | 1,090 |
| 2013 | 2 | — | 0 | 4,428 |
| 2014 | 2 | — | 0 | 10,849 |
| 2015 | 2 | — | 0 | 7,507 |
| 2016 | 2 | — | 0 | 4,556 |
| 2017 | 2 | — | 0 | 5,511 |
| 2018 | 1 | — | 0 | 5,244 |
| 2019 | 4 | 149 | 0 | 643 |
| 2020 | 2 | — | 0 | 466 |
| 2021 | 1 | — | 0 | 332 |
| 2022 | 1 | — | 0 | 209 |
| 2023 | 0 | — | 0 | 236 |
| 2024 | 1 | — | 0 | 318 |
| 2025 | 0 | — | 0 | 313 |
| 2026 | 0 | — | 1 | — |
https://510kreport.com/device/K923931 · printed Nov 4, 2026
Cite this page
510(k) Report. “K923931: Medtronic Model 3487A Pisces-Quad Lead.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K923931
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Record history
- FDA decision record loaded May 2, 2026
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026