510(k) · Cleared
ClearedPulmonary Function Tester, Model: A9
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Guangzhou Homesun Medical Technology Co., Ltd. · BTY Calculator, Predicted Values, Pulmonary Function
Cleared on Feb 21, 2024 as substantially equivalent to K071753 (Viasys Healthcare GmbH, 2007) after a 266-day review. Its family tree reaches back 1 generation to 2007.
- Decided
- Feb 21, 2024
- Review
- 266 days
- Class
- Class II
- Product code
- BTY
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 1 generation to K071753 (2007). No later device cites it as a predicate yet.
- Root · 1 generation backK071753 Masterscreen Pneumo & MasterscopeViasys Healthcare GmbH · 2007
- This deviceK231561 Pulmonary Function Tester, Model: A9Guangzhou Homesun Medical Technology Co., Ltd. · 2024
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −1 | K071753 | Masterscreen Pneumo & Masterscope | Viasys Healthcare GmbH | 2007 | — |
| 0 (this device) | K231561 | Pulmonary Function Tester, Model: A9 | Guangzhou Homesun Medical Technology Co., Ltd. | 2024 | — |
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 BTY? 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 BTY device
- #1 K260242 CPETWise Platformscore 13.1 · 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? (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 |
|---|---|---|---|
| * | K071753 | Masterscreen Pneumo & MasterscopeSummary page 5…dicate device Sponsor VIASYS HEALTHCARE GMBH Device Name and Model MASTERSCREEN PNEUMO & MASTERSCOPE 510(k) Number K071753 Product Code BTY Regulation Number 21 CFR 868.1890 Regulation Class II (4) D… | 2007 |
What descends from it?
No later submission names this one as a predicate yet.
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?
- Its one ancestor has no recall.
- 2 other devices also cite its predicate K071753.
How does its category compare?
All BTY devicesBTY Calculator, Predicted Values, Pulmonary Function: FDA decisions, review times, recalls and adverse event reports over 20 years. 2024, this device’s year, is highlighted.
FDA decisions per year · BTY
3in 2024
2026 to Oct 25, outlined.
Median 510(k) review, days · BTY
266in 2024
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · BTY
2in 2017
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · BTY
5in 2024
MAUDE reports naming product code BTY, 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 | 2 | — | 0 | 0 |
| 2008 | 3 | 104 | 0 | 0 |
| 2009 | 1 | — | 0 | 1 |
| 2010 | 1 | — | 0 | 0 |
| 2011 | 1 | — | 0 | 3 |
| 2012 | 3 | 139 | 0 | 2 |
| 2013 | 0 | — | 0 | 0 |
| 2014 | 0 | — | 1 | 1 |
| 2015 | 0 | — | 0 | 51 |
| 2016 | 1 | — | 0 | 24 |
| 2017 | 1 | — | 2 | 9 |
| 2018 | 0 | — | 0 | 5 |
| 2019 | 2 | — | 0 | 3 |
| 2020 | 1 | — | 0 | 3 |
| 2021 | 1 | — | 0 | 2 |
| 2022 | 1 | — | 0 | 2 |
| 2023 | 1 | — | 0 | 1 |
| 2024 | 3 | 266 | 0 | 5 |
| 2025 | 0 | — | 0 | 0 |
| 2026 | 1 | — | 0 | — |
What is it indicated for?
The Pulmonary Function Tester (Model: A9) is intended to be used for measurement and data collection of lung function parameters. The system performs cooperation-dependent flow-volume measurements. Measurements shall be performed under the direction of a physician in the clinic, doctors’ office or hospital. The Pulmonary Function Tester (Model: A9) is intended for use in patients from 4 years of age and older who can understand and perform instructions of the physician.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K231561 · printed Nov 4, 2026
Cite this page
510(k) Report. “K231561: Pulmonary Function Tester, Model: A9.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K231561
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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