510(k) · Cleared
ClearedAdvance Laser Flowmeter, Alf 21
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Transonic Systems, Inc. · DPW Flowmeter, Blood, Cardiovascular
Cleared on Oct 9, 1990 after a 60-day review. FDA has not posted a summary or statement for it, so its predicates are not known. 2 later devices descend from it.
- Decided
- Oct 9, 1990
- Review
- 60 days
- Class
- Class II
- Product code
- DPW
- Recalls
- None
- Predicates
- 0
2 later devices descend from it, 2 citing it directly.
- This deviceK903633 Advance Laser Flowmeter, Alf 21Transonic Systems, Inc. · 1990
- Descendant · cites it directly · 0 of its ownK140740 Transonic Tissue Perfusion MonitorTransonic Systems, Inc. · 2015
- Descendant · cites it directly · 0 of its ownK013376 Qflow 500 Perfusion Monitoring SystemHemedex Incorporated · 2002
Most influential descendants
Showing 2 of 2 · See allView FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K903633 | Advance Laser Flowmeter, Alf 21 | Transonic Systems, Inc. | 1990 | — |
| +1 | K140740 | Transonic Tissue Perfusion Monitor | Transonic Systems, Inc. | 2015 | — |
| +1 | K013376 | Qflow 500 Perfusion Monitoring System | Hemedex Incorporated | 2002 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2002 | 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 DPW? 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 DPW device
- #1 K251114 FloPatch FP120score 13.7 · 5 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? (2)
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)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- Of its descendants, K140740 (Transonic Systems, Inc., 2015) has gone furthest, with 0 descendants of its own.
How does its category compare?
All DPW devicesDPW Flowmeter, Blood, Cardiovascular: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · DPW
3in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · DPW
119in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · DPW
1in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · DPW
6in 2025
MAUDE reports naming product code DPW, 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 | — | 4 | 0 |
| 2008 | 1 | — | 0 | 0 |
| 2009 | 0 | — | 0 | 1 |
| 2010 | 2 | — | 1 | 0 |
| 2011 | 4 | 89 | 0 | 1 |
| 2012 | 1 | — | 1 | 0 |
| 2013 | 2 | — | 0 | 3 |
| 2014 | 0 | — | 0 | 8 |
| 2015 | 3 | 275 | 0 | 12 |
| 2016 | 1 | — | 0 | 1 |
| 2017 | 0 | — | 1 | 2 |
| 2018 | 2 | — | 0 | 0 |
| 2019 | 3 | 169 | 0 | 3 |
| 2020 | 2 | — | 0 | 4 |
| 2021 | 2 | — | 0 | 6 |
| 2022 | 3 | 136 | 0 | 1 |
| 2023 | 1 | — | 0 | 2 |
| 2024 | 1 | — | 0 | 4 |
| 2025 | 3 | 119 | 1 | 6 |
| 2026 | 2 | — | 0 | — |
https://510kreport.com/device/K903633 · printed Nov 4, 2026
Cite this page
510(k) Report. “K903633: Advance Laser Flowmeter, Alf 21.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K903633
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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