510(k) · Cleared
ClearedCap-One, Model TG-920P
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Nihon Kohden America, Inc. · CCK Analyzer, Gas, Carbon-Dioxide, Gaseous-Phase
Cleared on Oct 15, 2004 as substantially equivalent to K990063 (Nihon Kohden America, Inc., 1999) after a 196-day review. Its family tree reaches back 3 generations to 1993. 13 later devices descend from it.
- Decided
- Oct 15, 2004
- Review
- 196 days
- Class
- Class II
- Product code
- CCK
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 3 generations to K915494 (1993). 13 later devices descend from it, 3 citing it directly.
- Root · 3 generations backK915494 Nellcor Stat-Cap Airway CO2 Indicator, Model N-60Nellcor, Inc. · 1993
- 2 generations backK964305 Nihon Kohden Olg-100A Pocketcap Pocket CO2 Monitor with AccessoriesNihon Kohden America, Inc. · 1997
- 1 generation backK990063 Nihon Kohden TG-901T CO2 Sensor Kit with AccessoriesNihon Kohden America, Inc. · 1999
- This deviceK040875 Cap-One, Model TG-920PNihon Kohden America, Inc. · 2004
- Descendant · cites it directly · 7 of its ownK050833 Electrode Junction Box, Model JE-921ANihon Kohden America, Inc. · 2005
- Descendant · 2 generations on · 6 of its ownK120888 PSG-1100 Sleep Diagnostic SystemNihon Kohden Corp. · 2012 · Recalled
- Descendant · 3 generations on · 4 of its ownK142774 Polysmith Sleep SystemNeurotronics, Inc. · 2015
- Descendant · cites it directly · 3 of its ownK083456 Nihon Kohden CO2 Sensor Kit, Model TG-970PNihon Kohden America, Inc. · 2009
- Descendant · 4 generations on · 1 of its ownK173868 Serenity Body Position Sensor, Serenity RIP SensorsNeurotronics, Inc. · 2018
Showing 5 of 13 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 13 · See all- K050833Electrode Junction Box, Model JE-921ANihon Kohden America, Inc. · 2005 · cites it directly7descendants
- K120888PSG-1100 Sleep Diagnostic SystemNihon Kohden Corp. · 2012 · 2 generations on6descendants
- K142774Polysmith Sleep SystemNeurotronics, Inc. · 2015 · 3 generations on4descendants
- K083456Nihon Kohden CO2 Sensor Kit, Model TG-970PNihon Kohden America, Inc. · 2009 · cites it directly3descendants
- K173868Serenity Body Position Sensor, Serenity RIP SensorsNeurotronics, Inc. · 2018 · 4 generations on1descendant
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −3 | K915494 | Nellcor Stat-Cap Airway CO2 Indicator, Model N-60 | Nellcor, Inc. | 1993 | — |
| −2 | K964305 | Nihon Kohden Olg-100A Pocketcap Pocket CO2 Monitor with Accessories | Nihon Kohden America, Inc. | 1997 | — |
| −1 | K990063 | Nihon Kohden TG-901T CO2 Sensor Kit with Accessories | Nihon Kohden America, Inc. | 1999 | — |
| 0 (this device) | K040875 | Cap-One, Model TG-920P | Nihon Kohden America, Inc. | 2004 | — |
| +1 | K050833 | Electrode Junction Box, Model JE-921A | Nihon Kohden America, Inc. | 2005 | — |
| +2 | K120888 | PSG-1100 Sleep Diagnostic System | Nihon Kohden Corp. | 2012 | 1 |
| +3 | K142774 | Polysmith Sleep System | Neurotronics, Inc. | 2015 | — |
| +1 | K083456 | Nihon Kohden CO2 Sensor Kit, Model TG-970P | Nihon Kohden America, Inc. | 2009 | — |
| +4 | K173868 | Serenity Body Position Sensor, Serenity RIP Sensors | Neurotronics, Inc. | 2018 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2005 | 1 | 0 |
| 2007 | 1 | 0 |
| 2009 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 2 | 0 |
| 2015 | 1 | 0 |
| 2017 | 2 | 0 |
| 2018 | 2 | 0 |
| 2025 | 2 | 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 CCK? 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 CCK device
- #1 K253030 Capnostream™35 Portable Respiratory Monitor…score 15.8 · 16 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 |
|---|---|---|---|
| * | K990063 | Nihon Kohden TG-901T CO2 Sensor Kit with AccessoriesSummary page 1…ames for the TG-920P CO 2 Sensor Kit include CO 2 Analyzer and CO 2 Indicator. The predicate marketed device is the Nihon Kobden TG-901T CO 2 Sensor Kit as per 5 10(k): K990063, commercial distribution certification dated June 1999. The Nihon Kohden CO 2 Sensor Kit, model number TG-920P, is intended for… | 1999 |
What descends from it? (13)
See all 133 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 11 years and passes through 2 companies; a new generation was cleared every 3.5 years on median.
- None of the 3 ancestors has a recall.
- Of its descendants, K050833 (Nihon Kohden America, Inc., 2005) has gone furthest, with 7 descendants of its own.
How does its category compare?
All CCK devicesCCK Analyzer, Gas, Carbon-Dioxide, Gaseous-Phase: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · CCK
3in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · CCK
169in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · CCK
1in 2022
Class I (8 since 2007) Class II/III not classified
Adverse event reports per year · CCK
1,259in 2025
MAUDE reports naming product code CCK, 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 | 5 | 56 | 0 | 7 |
| 2008 | 3 | 248 | 1 | 20 |
| 2009 | 3 | 101 | 19 | 21 |
| 2010 | 3 | 125 | 4 | 12 |
| 2011 | 2 | — | 14 | 18 |
| 2012 | 7 | 150 | 3 | 13 |
| 2013 | 4 | 132 | 2 (1) | 28 |
| 2014 | 9 | 166 | 0 | 51 |
| 2015 | 5 | 105 | 1 | 114 |
| 2016 | 2 | — | 0 | 88 |
| 2017 | 5 | 134 | 0 | 58 |
| 2018 | 6 | 296 | 5 | 63 |
| 2019 | 7 | 261 | 7 (7) | 141 |
| 2020 | 4 | 188 | 1 | 2,302 |
| 2021 | 4 | 227 | 0 | 2,272 |
| 2022 | 3 | 226 | 1 | 2,475 |
| 2023 | 4 | 555 | 0 | 1,637 |
| 2024 | 3 | 592 | 0 | 1,216 |
| 2025 | 3 | 169 | 0 | 1,259 |
| 2026 | 3 | 224 | 0 | — |
What is it indicated for?
The Nihon Kohden TG-920P CO 2 Sensor Kit, is intended for medical purposes to measure the concentration of carbon dioxide in a gas mixture to aid in determining the patient's ventilatory status. Along with other methods indicated by the physician for medical diagnosis, this device is intended as an indicator of patient carbon dioxide concentration during expiration.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K040875 · printed Nov 5, 2026
Cite this page
510(k) Report. “K040875: Cap-One, Model TG-920P.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 5, 2026. https://510kreport.com/device/K040875
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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