510(k) · Cleared
ClearedMicro Diary Spirometer
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Viasys Respiratory Care, Inc. · BZG Spirometer, Diagnostic
Cleared on Mar 7, 2011 as substantially equivalent to K965042 (Micro Direct, Inc., 1997) after a 336-day review. Its family tree reaches back 3 generations to 1990. 1 later device descends from it.
- Decided
- Mar 7, 2011
- Review
- 336 days
- Class
- Class II
- Product code
- BZG
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 3 generations to K901057 (1990). 1 later device descends from it, 1 citing it directly.
- Root · 3 generations backK901057 Spirometrics Model 2600 Miro SpirometerSpirometrics, Inc. · 1990
- 2 generations backK963035 Micro SpirometerMicro Direct, Inc. · 1996
- 1 generation backK965042 Microdl Diarycard SpirometerMicro Direct, Inc. · 1997
- This deviceK100928 Micro Diary SpirometerViasys Respiratory Care, Inc. · 2011
- Descendant · cites it directly · 0 of its ownK113096 Micro ICarefusion Germany 234 GmbH · 2012
Most influential descendants
Showing 1 of 1 · See all- K113096Micro ICarefusion Germany 234 GmbH · 2012 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −3 | K901057 | Spirometrics Model 2600 Miro Spirometer | Spirometrics, Inc. | 1990 | — |
| −2 | K963035 | Micro Spirometer | Micro Direct, Inc. | 1996 | — |
| −1 | K965042 | Microdl Diarycard Spirometer | Micro Direct, Inc. | 1997 | — |
| 0 (this device) | K100928 | Micro Diary Spirometer | Viasys Respiratory Care, Inc. | 2011 | — |
| +1 | K113096 | Micro I | Carefusion Germany 234 GmbH | 2012 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2012 | 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 BZG? 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 BZG device
- #1 K251777 MESI mTABLET SPIROscore 13.0 · 8 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 |
|---|---|---|---|
| * | K965042 | Microdl Diarycard SpirometerSummary page 1…l: merritt.ciirpiscbcarefusion.com Substantial Equivalence The Micro Diary Spirometer is substantially equivalent to the previous version of the Micro Diary Spirometer (K965042). Description of the device The Micro Diary Spirometer is a compact, hand held, and battery operated recording spirometer. The d… | 1997 |
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 |
|---|---|---|---|
| K113096 | Micro I | 2012 | 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?
- The line of descent spans 21 years and passes through 3 companies; a new generation was cleared every 6.6 years on median.
- None of the 3 ancestors has a recall.
- Of its descendants, K113096 (Carefusion Germany 234 GmbH, 2012) has gone furthest, with 0 descendants of its own.
How does its category compare?
All BZG devicesBZG Spirometer, Diagnostic: FDA decisions, review times, recalls and adverse event reports over 20 years. 2011, this device’s year, is highlighted.
FDA decisions per year · BZG
2in 2024
2026 to Oct 25, outlined.
Median 510(k) review, days · BZG
362in 2023
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · BZG
1in 2024
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · BZG
1in 2025
MAUDE reports naming product code BZG, 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 | 3 | 121 | 0 | 1 |
| 2008 | 3 | 209 | 0 | 0 |
| 2009 | 8 | 141 | 0 | 0 |
| 2010 | 4 | 181 | 0 | 0 |
| 2011 | 6 | 278 | 0 | 1 |
| 2012 | 3 | 59 | 0 | 2 |
| 2013 | 3 | 266 | 0 | 1 |
| 2014 | 5 | 154 | 0 | 1 |
| 2015 | 5 | 273 | 0 | 1 |
| 2016 | 4 | 235 | 0 | 1 |
| 2017 | 2 | — | 0 | 1 |
| 2018 | 1 | — | 0 | 1 |
| 2019 | 3 | 146 | 0 | 1 |
| 2020 | 5 | 126 | 0 | 2 |
| 2021 | 1 | — | 0 | 1 |
| 2022 | 2 | — | 0 | 3 |
| 2023 | 5 | 362 | 0 | 2 |
| 2024 | 2 | — | 1 | 3 |
| 2025 | 0 | — | 0 | 1 |
| 2026 | 1 | — | 0 | — |
What is it indicated for?
The Micro Diary Spirometer is used in pulmonary function testing to
measure the volume of gas moving in or out of a patients lungs. Specifically, the Micro Diary
Spirometer measures the following lung function parameters: FEVi, FVC, FEV6 and PEF.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K100928 · printed Nov 5, 2026
Cite this page
510(k) Report. “K100928: Micro Diary Spirometer.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 5, 2026. https://510kreport.com/device/K100928
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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