510(k) · Cleared
ClearedAbx Pentra 120 Retic Automated Hematology Analyzer
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Abx Diagnostics · GKZ Counter, Differential Cell
Cleared on Aug 11, 1999 as substantially equivalent to K990311 (Abx Diagnostics, 1999) and 1 other predicate after a 75-day review. Its family tree reaches back 2 generations to 1991. 3 later devices descend from it.
- Decided
- Aug 11, 1999
- Review
- 75 days
- Class
- Class II
- Product code
- GKZ
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 2 generations to K912494 (1991). 4 ancestors in all. 3 later devices descend from it, 3 citing it directly.
- Root · 2 generations backK912494 Sysmex (TM) R-3000 Automated Reticulocyte AnalyzerToa Medical Electronics USA, Inc. · 1991
- 1 generation backK990311 Vega Retic Automated Hematology AnalyzerAbx Diagnostics · 1999
- This deviceK991839 Abx Pentra 120 Retic Automated Hematology AnalyzerAbx Diagnostics · 1999
- Descendant · cites it directly · 2 of its ownK022200 Pentra 120/Pentra 120 Retic Options SPS, Model Pentra 120Abx Diagnostics · 2002 · Recalled
- Descendant · cites it directly · 1 of its ownK050719 Abx Pentra DX 120: Option SPS EvolutionHoriba Abx · 2005 · Recalled
- Descendant · cites it directly · 0 of its ownK151133 Pentra XLRHoriba Abx Sas · 2015
Most influential descendants
Showing 3 of 3 · See allView FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −2 | K912494 | Sysmex (TM) R-3000 Automated Reticulocyte Analyzer | Toa Medical Electronics USA, Inc. | 1991 | — |
| −1 | K990311 | Vega Retic Automated Hematology Analyzer | Abx Diagnostics | 1999 | — |
| 0 (this device) | K991839 | Abx Pentra 120 Retic Automated Hematology Analyzer | Abx Diagnostics | 1999 | — |
| +1 | K022200 | Pentra 120/Pentra 120 Retic Options SPS, Model Pentra 120 | Abx Diagnostics | 2002 | 2 |
| +1 | K050719 | Abx Pentra DX 120: Option SPS Evolution | Horiba Abx | 2005 | 1 |
| +1 | K151133 | Pentra XLR | Horiba Abx Sas | 2015 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2002 | 1 | 0 |
| 2005 | 1 | 0 |
| 2015 | 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 GKZ? 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 GKZ device
- #1 K250943 Sysmex XR-Series (XR-10) Automated Hematology…score 13.2 · 3 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 |
|---|---|---|---|
| * | K990311 | Vega Retic Automated Hematology AnalyzerSummary page 1…Substantial Equivalence: The ABX PENTRA 120 RETIC Automated Hematology Analyzer is substantially equivalent to the ABX PENTRA 120 RETIC Automated Hematology Analyzer (K990311, cleared to market March 31, 1999) and to the Sysmex™ IRF clinical parameter (K971736, cleared to market August 26, 1997). Descr… | 1999 |
| * | K971736 | Sysmex Immature Reticulocyte Fraction (Irf) ParameterSummary page 1…substantially equivalent to the ABX PENTRA 120 RETIC Automated Hematology Analyzer (K990311, cleared to market March 31, 1999) and to the Sysmex™ IRF clinical parameter (K971736, cleared to market August 26, 1997). Description: The ABX PENTRA 120 RETIC Automated Hematology Analyzer is a benchtop, clinica… | 1997 |
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?
- The line of descent spans 8 years and passes through 2 companies; a new generation was cleared every 7.6 years on median.
- None of the 4 ancestors has a recall.
- Of its descendants, K022200 (Abx Diagnostics, 2002) has gone furthest, with 2 descendants of its own.
- 3 other devices also cite its predicate K990311.
How does its category compare?
All GKZ devicesGKZ Counter, Differential Cell: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · GKZ
4in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · GKZ
108in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · GKZ
1in 2025
Class I (2 since 2007) Class II/III not classified
Adverse event reports per year · GKZ
77in 2025
MAUDE reports naming product code GKZ, 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 | 6 | 117 | 37 | 268 |
| 2008 | 6 | 99 | 5 | 925 |
| 2009 | 6 | 147 | 13 | 559 |
| 2010 | 4 | 290 | 27 | 896 |
| 2011 | 3 | 315 | 28 | 2,905 |
| 2012 | 3 | 408 | 7 | 2,959 |
| 2013 | 1 | — | 6 | 3,070 |
| 2014 | 3 | 165 | 0 | 3,112 |
| 2015 | 3 | 273 | 3 | 1,972 |
| 2016 | 3 | 198 | 3 | 3,338 |
| 2017 | 4 | 280 | 3 | 229 |
| 2018 | 3 | 270 | 2 (2) | 497 |
| 2019 | 5 | 210 | 2 | 908 |
| 2020 | 1 | — | 1 | 342 |
| 2021 | 0 | — | 0 | 391 |
| 2022 | 3 | 638 | 4 | 198 |
| 2023 | 4 | 329 | 1 | 155 |
| 2024 | 3 | 157 | 0 | 115 |
| 2025 | 4 | 108 | 1 | 77 |
| 2026 | 4 | 254 | 0 | — |
What is it indicated for?
The ABX PENTRA 120 RETIC Automated Hematology Analyzer is an automated hematology analyzer providing complete blood count (CBC), differential leucocyte count (DIFF) as well as reticulocyte count for in vitro diagnostic use in clinical laboratories. The ABX PENTRA 120 RETIC Automated Hematology Analyzer provides appropriate flags and alarms to assist users in final checking and identification of abnormal cell populations.
The clinical use of the reticulocyte count, specifically the immature reticulocyte fraction (IRF), is to monitor erythropoietic activity in patients.
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/K991839 · printed Nov 4, 2026
Cite this page
510(k) Report. “K991839: Abx Pentra 120 Retic Automated Hematology Analyzer.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K991839
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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