This device is intended for monitoring PEF (Peak Expired Flow Rate) and FEV1 (Forced Expiratory Volume in one second) for patient home use. The device is designed for pediatric to adult patients. The device is intended for monitoring respiratory conditions such as asthma.
Device Story
MSA100 Peak Flow Meter measures patient's maximum exhalation (PEF) and forced expiratory volume in one second (FEV1); intended for home use by pediatric to adult patients. Device utilizes turbine transducer; air flow rotates turbine leaf; photoelectric conversion transforms rotation into pulse signals; main controller processes signals to calculate flow and volume. Output displayed for patient/clinician to monitor respiratory conditions like asthma, COPD, or chronic bronchitis. Device stores up to 300 measurements with date/time in flash memory. Powered by two AAA alkaline batteries.
Clinical Evidence
No clinical data. Substantial equivalence supported by bench testing, including measurement range and accuracy verification, biocompatibility (ISO 10993-5, ISO 10993-10), electrical safety (IEC 60601-1), EMC (IEC 60601-1-2), and ATS 2005 performance standards.
Technological Characteristics
Turbine transducer sensing; photoelectric conversion; main controller processing. Flash memory storage. Powered by 2x AAA 1.5V alkaline batteries. Biocompatibility per ISO 10993-5 and ISO 10993-10. Electrical safety per IEC 60601-1:2012 and IEC 60601-1-2:2004. Performance per ATS 2005.
Indications for Use
Indicated for pediatric to adult patients for monitoring respiratory conditions such as asthma, COPD, or chronic bronchitis by measuring PEF and FEV1.
Regulatory Classification
Identification
A peak-flow meter for spirometry is a device used to measure a patient's maximum ventilatory flow rate.
Predicate Devices
MICROLIFE ELECTRONIC PEAK FLOW MONITOR, WITH PEF AND FEV1, MODELS PF-100 AND PF-100-1 (K040723)
Submission Summary (Full Text)
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
October 3, 2014
Beijing M&B Electronic Instruments, Co., Ltd. C/O Mr. Mike Gu Regulatory Affairs Manager Osmunda Medical Device Consulting Co., Ltd 7th Floor, Jingui Business Building, No. 982 Congyun Rd Baiyun District Guangzhou, Guangdong China 510420
Re: K133975
Trade/Device Name: MSA100 Peak Flow Meter Regulation Number: 21 CFR 868.1860 Regulation Name: Meter, Peak Flow, Spirometry Regulatory Class: II Product Code: BZH Dated: August 20, 2014 Received: August 22, 2014
Dear Mr. Gu:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food. Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
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Page 2 - Mr. Gu
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Small Manufacturers, International and Consumer Assistance at its tollfree number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours,
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Tejashri Purohit-Sheth, M.D. Clinical Deputy Director DAGRID/ODE/CDRH FOR
Erin I. Keith, M.S. Director Division of Anesthesiology, General Hospital, Respiratory, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K133975
Device Name MSA100 Peak Flow Meter
Indications for Use (Describe)
This device is intended for monitoring PEF (Peak Expired Flow Rate) and FEV 1 (Forced Expiratory Volume in one second) for patient home use. The device is designed for pediatic to adult patients. The device is intended for monitoring respiratory conditions such as asthma.
Type of Use (Select one or both, as applicable)
- Prescription Use (Part 21 CFR 801 Subpart D)
> Over-The-Counter Use (21 CFR 801 Subpart C)
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## 510(k) Summary
In accordance with 21 CFR 807.92 the following summary of information is provided:
| Date: | 20 Dec 2013 |
|---------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Submitter: | Beijing M&B Electronic Instruments Co., Ltd,<br>Room 6319, Building 1, No. 27, Yongwang Road, Beijing<br>Bioengineering and Medicine Industry Base, Huangcun Town,<br>Daxing district, Beijing, People's Republic of China |
| Primary Contact Person: | Yang Shisheng<br>Project Manager<br>Beijing M&B Electronic Instruments Co., Ltd.<br>Tel: +86-10-61253716-8037<br>Fax: +86-10-61253794 |
| Secondary Contact Person: | Mike Gu<br>Regulatory Affairs Manager<br>OSMUNDA Medical Device Service Group<br>Tel: +86-20-62321333<br>Fax: +86-20-86330253 |
| Device: | <b>Trade Name:</b> MSA100 Peak Flow Meter<br><b>Common/Usual Name:</b> Peak Flow Meter<br><b>Regulation number</b> 868.1860<br><b>Classification Names:</b> Meter, Peak Flow, Spirometry<br><b>Product Code:</b> BZH<br><b>Predicate Device(s):</b> K040723, MICROLIFE ELECTRONIC PEAK FLOW MONITOR, WITH<br>PEF AND FEV1, MODELS PF-100 AND PF-100-1 (WITH<br>SOFTWARE)<br><b>Device Description:</b> The MSA100 Peak Flow Meter is a medical device that measures<br>patient's maximum possible exhalation which is called "peak<br>flow" (referred to in medical terms as PEF-Peak Expiratory Flow)<br>and "forced expiratory volume" (commonly known as FEV1) in<br>one second. Regular monitoring of the peak flow is useful for<br>monitoring diseases of the airways such as asthma, C.O.P.D, or<br>chronic bronchitis, is usually used for patient home use.<br><b>Intended Use:</b> This device is intended for monitoring PEF (Peak Expired Flow<br>Rate) and FEV1 (Forced Expiratory Volume in one second) for<br>patient home use. The device is designed for pediatric to adult<br>patients. The device is intended for monitoring respiratory |
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### Technology:
Technically, the turbine transducer is the key component for both predicate and proposed device, when air flow passes through, it makes the leaf of turbine rotate. Rotary speed of the leaf is linear relationship with air flow rate. By the technology of photoelectric conversion, turning of the leaf is converted to be pulse signal, which is processed by the main controller after sampling.
| Specification | Predicate Device<br>Microlife Electronic<br>Peak Flow Monitor | Proposed<br>MSA100 Peak Flow<br>Meter |
|--------------------------|------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------|
| Device name | Microlife Electronic<br>Peak Flow Monitor, with<br>PEF and FEV1, Models<br>PF-100 and PF 100-1 | MSA100 Peak Flow<br>Meter |
| Manufacturer | Microlife Intellectual<br>Property GmbH | Beijing M&B Electronic<br>Instruments Co., Ltd |
| Patient<br>Population | The device is designed<br>for pediatric to adult<br>patients | The device is designed<br>for pediatric to adult<br>patients |
| Environment<br>of<br>Use | OTC | OTC |
| Measuring range | PEF from 50 to 900<br>l/min<br>FEV1 from 0.01 to 9.99<br>liters | PEF from 50 to 900<br>l/min<br>FEV1 from 0.01 to 9.99<br>liters |
| Measuring<br>method | Flow: Turbine sensor<br>Volume: Flow Integration | Flow: Turbine sensor<br>Volume: Flow<br>Integration |
| Accuracy | PEF ± 25 l/min or 12% of<br>the reading;<br>FEV1 ± 0.1 l or ± 5% of<br>the reading | PEF ± 20 l/min or± 10%<br>of the reading;<br>FEV1 ± 0.05 l or ± 3% of<br>the reading |
| Measuring<br>solution | PEF 1 l/min; FEV1 0.01 l | PEF 1 l/min; FEV1 0.01 l |
| Data safety | Data rememorized by<br>EEPROM | Data rememorized by<br>Flash memory |
| Memory | 240 measurements with<br>date/time | 300<br>measurements<br>with date/time |
| Power source | 2 batteries of 1.5V, size<br>AAA | AAA 1.5×2 alkaline<br>batteries |
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MSA100 Peak Flow Meter 510k submission
| Electrical Safety | IEC 60601-1 and IEC 60601-1-2 | IEC 60601-1 and IEC 60601-1-2 |
|-------------------|-------------------------------|-------------------------------|
|-------------------|-------------------------------|-------------------------------|
The following technological differences exist between the proposed device and the predicate device:
- Use of flash memory
- Different appearance
Determination of Substantial Equivalence:
### Summary of Non-Clinical Tests:
The sponsor has performed bench tests to demonstrate the MSA100 Peak Flow Meter performs within specifications:
- . Measuring range: PEF from 50 to 900 l/min; FEV1 from 0.01 to 9.99 liters
- . Accuracy: PEF ± 20 l/min or± 10% of the reading; FEV1 ± 0.05L or ± 3% of the reading
Also the proposed device had met acceptance criteria of performance testing including biocompatibility (In vitro cytotoxicity, irritation and sensitization testing), electrical safety & EMC testing and ATS 2005:
- 1. IEC 60601-1: 2012;
- 2. IEC 60601-1-2: 2004;
- 3. AST 2005 update;
- 4. ISO 10993-5: 2009;
- 5. ISO 10993-10: 2010.
### Summary of Clinical Tests:
The subject of this premarket submission, MSA100 Peak Flow Meter, did not require clinical studies to support substantial equivalence.
- Beijing M&B Electronic Instruments Co., Ltd considers the Conclusion: MSA100 Peak Flow Meter to be as safe, as effective, and performance is substantially equivalent to the predicate device(s).
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.