510(k) · Cleared
Recalled · Class II · 2014Respiratory and Cardiac Spectral Frequency Signal Processor
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Ansar · DRT Monitor, Cardiac (Incl. Cardiotachometer & Rate Alarm)
Cleared on Sep 20, 1995 after a 554-day review. FDA has not posted a summary or statement for it, so its predicates are not known. 3 later devices descend from it. It has been recalled once.
- Decided
- Sep 20, 1995
- Review
- 554 days
- Class
- Class II
- Product code
- DRT
- Recalls
- 1
- Predicates
- 0
3 later devices descend from it, 2 citing it directly.
- This deviceK941252 Respiratory and Cardiac Spectral Frequency Signal ProcessorAnsar · 1995
- Descendant · cites it directly · 1 of its ownK062068 Intelwave Heart Rate Variability System, Version 1.0Intelwave, LLC · 2006
- Descendant · 2 generations on · 0 of its ownK142551 QANS (Quantitative Autonomic Nervous System) Monitoring SystemHhssystems, LLC · 2015
- Descendant · cites it directly · 0 of its ownK092809 HRV AcquireWr Medical Electronics Co. · 2010
Most influential descendants
Showing 3 of 3 · See all- K062068Intelwave Heart Rate Variability System, Version 1.0Intelwave, LLC · 2006 · cites it directly1descendant
- K142551QANS (Quantitative Autonomic Nervous System) Monitoring SystemHhssystems, LLC · 2015 · 2 generations on0descendants
- K092809HRV AcquireWr Medical Electronics Co. · 2010 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K941252 | Respiratory and Cardiac Spectral Frequency Signal Processor | Ansar | 1995 | — |
| +1 | K062068 | Intelwave Heart Rate Variability System, Version 1.0 | Intelwave, LLC | 2006 | — |
| +2 | K142551 | QANS (Quantitative Autonomic Nervous System) Monitoring System | Hhssystems, LLC | 2015 | — |
| +1 | K092809 | HRV Acquire | Wr Medical Electronics Co. | 2010 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2006 | 1 | 0 |
| 2010 | 1 | 0 |
| 2015 | 1 | 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.
Planning a device in DRT? 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 DRT device
- #1 K252676 The Circadia C300 System (C300)score 15.3 · 6 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 has not posted a summary or statement for it, so its predicates are not known.
What descends from it? (3)
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 |
|---|---|---|---|---|
| Jul 1, 2014 | Class II | Z-2268-2014 | Unknown/Undetermined by firm | The blood pressure (BP) circuit occasionally fails to inflate the blood pressure cuff and the BP circuit fails to activate, resulting in no BP measured. |
No ancestor or descendant has a Class I recall.
What does this lineage say?
- Of its descendants, K062068 (Intelwave, LLC, 2006) has gone furthest, with 1 descendant of its own.
How does its category compare?
All DRT devicesDRT Monitor, Cardiac (Incl. Cardiotachometer & Rate Alarm): FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · DRT
1in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · DRT
228in 2024
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · DRT
1in 2024
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · DRT
40in 2025
MAUDE reports naming product code DRT, 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 | 113 |
| 2008 | 1 | — | 0 | 99 |
| 2009 | 6 | 70 | 0 | 118 |
| 2010 | 3 | 44 | 0 | 63 |
| 2011 | 3 | 149 | 1 | 36 |
| 2012 | 1 | — | 0 | 47 |
| 2013 | 1 | — | 0 | 16 |
| 2014 | 0 | — | 0 | 26 |
| 2015 | 1 | — | 0 | 48 |
| 2016 | 1 | — | 0 | 55 |
| 2017 | 1 | — | 0 | 159 |
| 2018 | 1 | — | 0 | 224 |
| 2019 | 1 | — | 0 | 447 |
| 2020 | 0 | — | 0 | 50 |
| 2021 | 2 | — | 1 | 85 |
| 2022 | 1 | — | 0 | 35 |
| 2023 | 1 | — | 0 | 47 |
| 2024 | 3 | 228 | 1 | 29 |
| 2025 | 1 | — | 0 | 40 |
| 2026 | 5 | 120 | 0 | — |
https://510kreport.com/device/K941252 · printed Nov 6, 2026
Cite this page
510(k) Report. “K941252: Respiratory and Cardiac Spectral Frequency Signal Processor.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K941252
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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