510(k) · Cleared
ClearedKendall CO2NFIRM Now CO2 Detector
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Kendall · KNT Tubes, Gastrointestinal (And Accessories)
Cleared on Nov 5, 2004 as substantially equivalent to K894053 (Fenem, Inc., 1989) and 1 other predicate after a 45-day review. Its family tree reaches back 1 generation to 1989. 1 later device descends from it.
- Decided
- Nov 5, 2004
- Review
- 45 days
- Class
- Class II
- Product code
- KNT
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 1 generation to K894053 (1989). 2 ancestors in all. 1 later device descends from it, 1 citing it directly.
Most influential descendants
Showing 1 of 1 · See all- K212316DoubleChek DC-1001Nasogastric Feeding Solutions, Ltd. · 2022 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −1 | K894053 | 2ND Modification of Fef (TM) End-Tidal CO2 Detector | Fenem, Inc. | 1989 | — |
| 0 (this device) | K042572 | Kendall CO2NFIRM Now CO2 Detector | Kendall | 2004 | — |
| +1 | K212316 | DoubleChek DC-1001 | Nasogastric Feeding Solutions, Ltd. | 2022 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1994 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2022 | 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 KNT? 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 KNT device
- #1 K261890 52Fr ViSiGi LUX™; 52Fr ViSiGi 3D®score 12.7 · 4 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 |
|---|---|---|---|
| * | K894053 | 2ND Modification of Fef (TM) End-Tidal CO2 DetectorSummary page 1…Kendall Ca 2nfirm NOW TM C02 Detector 3. Legally Marketed Devices to Which Substantial Equivalence Is Claimed * Easy Cap® C02 detector, 510(k) number K894053, cleared on 7/20/89 * Pedi-Cap® C02 detector, 510(k) number K944400, cleared on 9/27/94 4. Device Description… | 1989 |
| * | K944400 | Pedi-CapSummary page 1…Which Substantial Equivalence Is Claimed * Easy Cap® C02 detector, 510(k) number K894053, cleared on 7/20/89 * Pedi-Cap® C02 detector, 510(k) number K944400, cleared on 9/27/94 4. Device Description The Kendall CO 2nfirm NOW TM 002 Detector is a disposable device that is us… | 1994 |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K212316 | DoubleChek DC-1001 | 2022 | 0 |
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?
How does its category compare?
All KNT devicesKNT Tubes, Gastrointestinal (And Accessories): FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · KNT
4in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · KNT
136in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · KNT
13in 2025
Class I (1 since 2007) Class II/III not classified
Adverse event reports per year · KNT
1,451in 2025
MAUDE reports naming product code KNT, 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 | 10 | 118 | 1 | 300 |
| 2008 | 10 | 115 | 82 | 867 |
| 2009 | 11 | 102 | 9 | 818 |
| 2010 | 12 | 104 | 3 | 517 |
| 2011 | 7 | 211 | 2 | 531 |
| 2012 | 12 | 107 | 1 | 528 |
| 2013 | 7 | 128 | 0 | 747 |
| 2014 | 16 | 259 | 0 | 1,030 |
| 2015 | 10 | 140 | 1 | 1,048 |
| 2016 | 6 | 99 | 3 | 1,251 |
| 2017 | 9 | 247 | 4 | 1,672 |
| 2018 | 7 | 149 | 2 | 1,901 |
| 2019 | 10 | 126 | 2 | 1,838 |
| 2020 | 5 | 102 | 1 | 1,641 |
| 2021 | 6 | 121 | 2 | 1,655 |
| 2022 | 7 | 110 | 1 (1) | 1,650 |
| 2023 | 5 | 162 | 2 | 1,863 |
| 2024 | 9 | 103 | 0 | 1,344 |
| 2025 | 4 | 136 | 13 | 1,451 |
| 2026 | 3 | 105 | 20 | — |
What is it indicated for?
Used to assist verification of tube location during oral or nasal placement of a gastric tube in adults.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K042572 · printed Nov 5, 2026
Cite this page
510(k) Report. “K042572: Kendall CO2NFIRM Now CO2 Detector.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 5, 2026. https://510kreport.com/device/K042572
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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