510(k) · Cleared
ClearedMR290 Humidification Chamber Single Use
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Fisher & Paykel Electronics, Ltd. · BTT Humidifier, Respiratory Gas, (Direct Patient Interface)
Cleared on Jan 24, 1994 after a 152-day review. FDA lists a 510(k) statement for it but has not posted the file, so its predicates are not known. 5 of the 78 devices in its family, counting itself, have a Class I recall. 77 later devices descend from it.
- Decided
- Jan 24, 1994
- Review
- 152 days
- Class
- Class II
- Product code
- BTT
- Recalls
- None
- Predicates
- 0
77 later devices descend from it, 8 citing it directly. 5 of the 78 devices in this family, counting this one, have a Class I recall.
- This deviceK934140 MR290 Humidification Chamber Single UseFisher & Paykel Electronics, Ltd. · 1994
- Descendant · cites it directly · 73 of its ownK983112 Respiratory Humidifier, Model # MR850Fisher & Paykel Healthcare, Ltd. · 1998 · Recalled
- Descendant · 2 generations on · 65 of its ownK020332 Respiratory Humidifier, Model MR850Fisher & Paykel Healthcare, Ltd. · 2003 · Recalled
- Descendant · 3 generations on · 54 of its ownK033710 MR850 Respiratory Humidifier, Model MR850JHUFisher & Paykel Healthcare, Ltd. · 2004
- Descendant · 4 generations on · 47 of its ownK073706 Respiratory Humidifier, Model MR850Fisher & Paykel Healthcare, Ltd. · 2008
- Descendant · 5 generations on · 30 of its ownK092846 Airvo Series HumidifiersFisher & Paykel Healthcare, Ltd. · 2010
Showing 5 of 77 descendants. See all descendants
Descendants cleared per year
Class I recalls in this family
Most influential descendants
Showing 5 of 77 · See all- K983112Respiratory Humidifier, Model # MR850Fisher & Paykel Healthcare, Ltd. · 1998 · cites it directly73descendants
- K020332Respiratory Humidifier, Model MR850Fisher & Paykel Healthcare, Ltd. · 2003 · 2 generations on65descendants
- K033710MR850 Respiratory Humidifier, Model MR850JHUFisher & Paykel Healthcare, Ltd. · 2004 · 3 generations on54descendants
- K073706Respiratory Humidifier, Model MR850Fisher & Paykel Healthcare, Ltd. · 2008 · 4 generations on47descendants
- K092846Airvo Series HumidifiersFisher & Paykel Healthcare, Ltd. · 2010 · 5 generations on30descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K934140 | MR290 Humidification Chamber Single Use | Fisher & Paykel Electronics, Ltd. | 1994 | — |
| +1 | K983112 | Respiratory Humidifier, Model # MR850 | Fisher & Paykel Healthcare, Ltd. | 1998 | 5 |
| +2 | K020332 | Respiratory Humidifier, Model MR850 | Fisher & Paykel Healthcare, Ltd. | 2003 | 1 |
| +3 | K033710 | MR850 Respiratory Humidifier, Model MR850JHU | Fisher & Paykel Healthcare, Ltd. | 2004 | — |
| +4 | K073706 | Respiratory Humidifier, Model MR850 | Fisher & Paykel Healthcare, Ltd. | 2008 | — |
| +5 | K092846 | Airvo Series Humidifiers | Fisher & Paykel Healthcare, Ltd. | 2010 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 2000 | 3 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 2 | 0 |
| 2008 | 1 | 0 |
| 2010 | 4 | 0 |
| 2011 | 2 | 0 |
| 2012 | 3 | 0 |
| 2013 | 4 | 0 |
| 2014 | 5 | 1 |
| 2015 | 2 | 0 |
| 2016 | 5 | 2 |
| 2017 | 3 | 1 |
| 2018 | 3 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 0 |
| 2021 | 3 | 0 |
| 2022 | 3 | 0 |
| 2023 | 7 | 0 |
| 2024 | 9 | 0 |
| 2025 | 6 | 0 |
| 2026 | 4 | 0 |
Sources: FDA 510(k) database (decision fields), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
5 devices in this family have a Class I recall. 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 BTT device
- #1 K222197 F&P Optiflow Junior 2/2+ Nasal Cannula…score 16.8 · 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?
FDA lists a 510(k) statement for it but has not posted the file, so its predicates are not known.
What descends from it? (77)
See all 778 later devices cite it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K983112 | Respiratory Humidifier, Model # MR850 | 1998 | 73 |
| K102618 | Ventstar Heated, Infinity ID Breathing Circuit Heated | 2010 | 2 |
| K962223 | Water Chambers for ST 3000 Heated Humidifier | 1997 | 1 |
| K252066 | inspired™ Heated Breathing Circuit (510-008); inspired™ Heated Breathing Circuit… | 2026 | 0 |
| K160764 | AirLife Autofill Humidification Chamber Class I | 2016 | 0 |
| K160540 | Flexicare Neonatal Heated Wire Breathing System | 2016 | 0 |
| K150900 | Flexicare Heated Wire Breathing Systems | 2015 | 0 |
| K993282 | Ipi Humidifier Chamber | 2000 | 0 |
Has anything in its family been recalled? (5 Class I)
No FDA recall names this device.
Relatives with a Class I recall
Class I is FDA’s most serious recall class. A recall in the family tree is context for this device, not evidence about it.
- K160764AirLife Autofill Humidification ChamberCarefusion 2200, Inc. · 2016 · Cites it directly · ◆ in the 2016 descendants bar of FIG. 14 Class I recalls
- K151303AirLife Infant Heated Wire CircuitCare Fusion · 2016 · 3 generations on · ◆ in the 2016 descendants bar of FIG. 12 Class I recalls
- K131912Conchatherm Neptune Heated Humidifier, Comfort Flo Humidification System, Conchasmart ColumnTeleflex, Inc. · 2014 · 5 generations on · ◆ in the 2014 descendants bar of FIG. 12 Class I recalls
- K173280Neonatal ConchaSmart Breathing CircuitsTeleflexmedical, Inc. · 2018 · 5 generations on · ◆ in the 2018 descendants bar of FIG. 11 Class I recall
- K162242Comfort Flo Humidification SystemTeleflexmedical, Inc. · 2017 · 6 generations on · ◆ in the 2017 descendants bar of FIG. 12 Class I recalls
What does this lineage say?
- Of its descendants, K983112 (Fisher & Paykel Healthcare, Ltd., 1998) has gone furthest, with 73 descendants of its own.
How does its category compare?
All BTT devicesBTT Humidifier, Respiratory Gas, (Direct Patient Interface): FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · BTT
4in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · BTT
104in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · BTT
1in 2025
Class I (4 since 2007) Class II/III not classified
Adverse event reports per year · BTT
1,743in 2025
MAUDE reports naming product code BTT, 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 | 73 | 1 | 365 |
| 2008 | 4 | 199 | 1 | 456 |
| 2009 | 1 | — | 0 | 558 |
| 2010 | 4 | 113 | 2 | 562 |
| 2011 | 3 | 116 | 1 | 665 |
| 2012 | 2 | — | 0 | 583 |
| 2013 | 6 | 171 | 0 | 718 |
| 2014 | 7 | 231 | 5 (4) | 718 |
| 2015 | 1 | — | 0 | 670 |
| 2016 | 3 | 157 | 0 | 1,094 |
| 2017 | 3 | 303 | 0 | 1,007 |
| 2018 | 2 | — | 0 | 918 |
| 2019 | 1 | — | 0 | 894 |
| 2020 | 2 | — | 0 | 1,188 |
| 2021 | 2 | — | 0 | 1,510 |
| 2022 | 3 | 290 | 0 | 749 |
| 2023 | 7 | 258 | 0 | 716 |
| 2024 | 7 | 219 | 0 | 501 |
| 2025 | 4 | 104 | 1 | 1,743 |
| 2026 | 4 | 184 | 1 | — |
https://510kreport.com/device/K934140 · printed Nov 6, 2026
Cite this page
510(k) Report. “K934140: MR290 Humidification Chamber Single Use.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K934140
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Record history
- FDA decision record loaded May 2, 2026
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026