510(k) · Cleared
ClearedZmachine
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Consolidated Research of Richmond, Inc. · OLZ Automatic Event Detection Software For Polysomnograph With Electroencephalograph
Cleared on Jan 20, 2015 as substantially equivalent to K101830 (Consolidated Research of Richmond, Inc., 2011) and 1 other predicate after a 112-day review. Its family tree reaches back 6 generations to 1997.
- Decided
- Jan 20, 2015
- Review
- 112 days
- Class
- Class II
- Product code
- OLZ
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 6 generations to K962603 (1997). 34 ancestors in all, the oldest K873535 (1987). No later device cites it as a predicate yet.
- Root · 6 generations backK962603 Masimo Set MS-1 Pulse Oximeter & the Lnop Series of Sensors & CablesMasimo Corp. · 1997
- 5 generations backK973887 Masimo Set MS-1P Pulse Oximeter and the Lnop Series of Sensors and…Masimo Corp. · 1998
- 4 generations backK990966 Masimo Set 2000 Pulse Oximeter, Masimo Lnop -Adt-Adult/Pediatric…Masimo Corp. · 1999
- 3 generations backK040595 ALICE 5Respironics, Inc. · 2004 · Recalled
- 2 generations backK112102 Michele Sleep Scoring SystemsYounes Sleep Technologies · 2011
- 1 generation backK120450 Sleep ProfilerAdvanced Brain Monitoring, Inc. · 2012
- This deviceK142825 ZmachineConsolidated Research of Richmond, Inc. · 2015
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −6 | K962603 | Masimo Set MS-1 Pulse Oximeter & the Lnop Series of Sensors & Cables | Masimo Corp. | 1997 | — |
| −5 | K973887 | Masimo Set MS-1P Pulse Oximeter and the Lnop Series of Sensors and Cables | Masimo Corp. | 1998 | — |
| −4 | K990966 | Masimo Set 2000 Pulse Oximeter, Masimo Lnop -Adt-Adult/Pediatric Disposable… | Masimo Corp. | 1999 | — |
| −3 | K040595 | ALICE 5 | Respironics, Inc. | 2004 | 1 |
| −2 | K112102 | Michele Sleep Scoring Systems | Younes Sleep Technologies | 2011 | — |
| −1 | K120450 | Sleep Profiler | Advanced Brain Monitoring, Inc. | 2012 | — |
| 0 (this device) | K142825 | Zmachine | Consolidated Research of Richmond, Inc. | 2015 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1987 | 1 | 0 |
| 1992 | 1 | 0 |
| 1994 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 2 | 0 |
| 2004 | 2 | 0 |
| 2007 | 2 | 0 |
| 2008 | 1 | 0 |
| 2009 | 3 | 0 |
| 2011 | 3 | 0 |
| 2012 | 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 OLZ? 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 OLZ device
- #1 K253390 Somnum (Somnum)score 14.3 · 10 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 |
|---|---|---|---|
| * | K101830 | Zmachine, Model DT-100Summary page 5…deep sleep and REM) of the patient every 30 seconds. Substantial The Zmachine DT-200 is substantially equivalent to the Zmachine DT- Equivalence 100 (K101830) by Consolidated Research of Richmond, Inc., sharing the same indications for use, the same primary wake/sleep d… | 2011 |
| * | K120450 | Sleep ProfilerSummary page 5…and N2), deep sleep (N3) and REM. The further subdivision of sleep stages are substantially equivalent to the Sleep Profiler algorithm (K120450) by Advanced Brain Monitoring, Inc. The table below summarizes the technological characteristics of the Zmachine DT-200 in comp… | 2012 |
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 18 years and passes through 5 companies; a new generation was cleared every 2.3 years on median.
- 2 of the 34 ancestors have a recall of any class.
- 3 other devices also cite its predicate K101830.
How does its category compare?
All OLZ devicesOLZ Automatic Event Detection Software For Polysomnograph With Electroencephalograph: FDA decisions, review times, recalls and adverse event reports over 20 years. 2015, this device’s year, is highlighted.
FDA decisions per year · OLZ
4in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · OLZ
185in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · OLZ
No recall names OLZ since 2007.
Adverse event reports per year · OLZ
3in 2025
MAUDE reports naming product code OLZ, 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 | 1 | — | 0 | 0 |
| 2008 | 0 | — | 0 | 0 |
| 2009 | 0 | — | 0 | 0 |
| 2010 | 0 | — | 0 | 0 |
| 2011 | 1 | — | 0 | 0 |
| 2012 | 1 | — | 0 | 0 |
| 2013 | 1 | — | 0 | 0 |
| 2014 | 0 | — | 0 | 0 |
| 2015 | 2 | — | 0 | 0 |
| 2016 | 3 | 122 | 0 | 1 |
| 2017 | 2 | — | 0 | 0 |
| 2018 | 1 | — | 0 | 0 |
| 2019 | 2 | — | 0 | 0 |
| 2020 | 1 | — | 0 | 0 |
| 2021 | 1 | — | 0 | 0 |
| 2022 | 1 | — | 0 | 2 |
| 2023 | 2 | — | 0 | 1 |
| 2024 | 2 | — | 0 | 2 |
| 2025 | 4 | 185 | 0 | 3 |
| 2026 | 3 | 155 | 0 | — |
What is it indicated for?
The CRI Zmachine is a single-channel, EEG acquisition and analysis system, designed for use in the home or clinical environments. This device is intended to be used by qualified healthcare practitioners to monitor the wake and sleep states of adult patients and as an adjunct to their diagnosis of sleep disorders.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K142825 · printed Nov 6, 2026
Cite this page
510(k) Report. “K142825: Zmachine.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K142825
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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