510(k) · Cleared
Recalled · Class II · 2024Sight OLO
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Sight Diagnostics, Ltd. · GKZ Counter, Differential Cell
Cleared on Nov 1, 2019 as substantially equivalent to K112605 (Sysmex America, Inc., 2012) after a 210-day review. Its family tree reaches back 3 generations to 2004. 2 later devices descend from it. It has been recalled 4 times.
- Decided
- Nov 1, 2019
- Review
- 210 days
- Class
- Class II
- Product code
- GKZ
- Recalls
- 4
- Predicates
- 1
Its longest line of descent runs back 3 generations to K040073 (2004). 2 later devices descend from it, 2 citing it directly.
- Root · 3 generations backK040073 Sysmex Automated Hematology Analyzer, XE-2100 Series (XE-2100…Sysmex America, Inc. · 2004
- 2 generations backK071967 Sysmex XE-5000Sysmex America, Inc. · 2007 · Recalled
- 1 generation backK112605 Sysmex XN-SeriesSysmex America, Inc. · 2012 · Recalled
- This deviceK190898 Sight OLOSight Diagnostics, Ltd. · 2019
- Descendant · cites it directly · 0 of its ownK251249 Tru Hematology TestTruvian Sciences, Inc. · 2026
- Descendant · cites it directly · 0 of its ownK211840 Sight OLOS.D. Sight Diagnostics, Ltd. · 2022 · Recalled
Most influential descendants
Showing 2 of 2 · See allView FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −3 | K040073 | Sysmex Automated Hematology Analyzer, XE-2100 Series (XE-2100, XE-2100L) | Sysmex America, Inc. | 2004 | — |
| −2 | K071967 | Sysmex XE-5000 | Sysmex America, Inc. | 2007 | 1 |
| −1 | K112605 | Sysmex XN-Series | Sysmex America, Inc. | 2012 | 2 |
| 0 (this device) | K190898 | Sight OLO | Sight Diagnostics, Ltd. | 2019 | — |
| +1 | K251249 | Tru Hematology Test | Truvian Sciences, Inc. | 2026 | — |
| +1 | K211840 | Sight OLO | S.D. Sight Diagnostics, Ltd. | 2022 | 1 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2022 | 1 | 0 |
| 2026 | 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? (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 |
|---|---|---|---|
| * | K112605 | Sysmex XN-SeriesSummary page 4…nalyzer Classification: 21 CFR 864.5220, Class II, Product Code: GKZ Predicate Devices Sysmex® XN-Series (XN-10, XN-20) Automated Hematology Analyzers (K112605) Reference device PixCell Medical Technologies, Ltd.’s HemoScreen Hematology Analyzer (K180020) Device Description… | 2012 |
| † | K180020 | HemoScreen Hematology Analyzer | 2018 |
What descends from it? (2)
2 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)
Recalls of this device
| Date | Class | Recall | Root cause | Reason |
|---|---|---|---|---|
| May 13, 2024 | Class II | Z-2173-2024 | Process control | One Test Kit lot (TK1-10114) shows a positive bias in the platelet count due to bacterial contamination which can result in elevated counts with a bias of 7.5 k/ul. This results in the test kit lot performing outside of the device… |
| Jun 14, 2022 | Class II | Z-1469-2022 | Software Design Change | The default reference ranges for MCH, MCHC, and RDW for age group "Child 2-11y" are mixed up and incorrectly displayed on OLO devices running software version 2.63, 2.63.1, and 2.63.1.1. Due to the issue, results may incorrectly appear to… |
| Jan 20, 2022 | Class II | Z-0963-2022 | Software design | In instances where custom reference ranges were configured on the device post installation, a possibility to inadvertently apply changes to reference range values was found on software versions 2.59.3 and all earlier versions, which can… |
| Mar 17, 2021 | Class II | Z-2517-2021 | Labeling Change Control | Discrepancy in labeling between the adult CBC reference ranges presented in the OLO Operator's Manual and the OLO software |
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 15 years and passes through 2 companies; a new generation was cleared every 4.9 years on median.
- 2 of the 3 ancestors have a recall of any class.
- Of its descendants, K251249 (Truvian Sciences, Inc., 2026) has gone furthest, with 0 descendants of its own.
- 12 other devices also cite its predicate K112605.
How does its category compare?
All GKZ devicesGKZ Counter, Differential Cell: FDA decisions, review times, recalls and adverse event reports over 20 years. 2019, this device’s year, is highlighted.
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 Sight OLO is a quantitative multi-parameter automated hematology analyzer intended for in vitro diagnostic use in screening capillary or venous whole blood samples collected in K2EDTA blood collection tubes, or fingertip samples collected using the Sight OLO test kit micro-capillary tubes.
When used with the Sight OLO cartridge, the Sight OLO enumerates the following CBC parameters in whole blood: WBC, RBC, HGB, HCT, MCV, MCH, MCHC, RDW, PLT, NEUT%/#, LYMPH %/#, MONO %/#, EOS%/#, and BASO%/#.
The Sight OLO is indicated for use in clinical laboratories to identify and classify one or more of the formed elements of blood in children 3 months and above, adolescents and adults.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K190898 · printed Nov 3, 2026
Cite this page
510(k) Report. “K190898: Sight OLO.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 3, 2026. https://510kreport.com/device/K190898
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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