K141362 · Contec Medical Systems Co.,Ltd · DQA · Apr 23, 2015 · Cardiovascular
Device Facts
Record ID
K141362
Device Name
PULSE OXIMETER CMS50EW
Applicant
Contec Medical Systems Co.,Ltd
Product Code
DQA · Cardiovascular
Decision Date
Apr 23, 2015
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 870.2700
Device Class
Class 2
Indications for Use
The Pulse Oximeter CMS50EW is a non-invasive device intended for spot-check or continuous monitoring of non-invasive oxygen saturation of arterial hemoglobin (SpO2) and the pulse rate through the finger of adult patients in home and hospital environments (including clinical use internist/surgery, anesthesia, and intensive care settings). The device is reusable and not intended for out-of-hospital transport use.
Device Story
Battery-powered fingertip pulse oximeter; measures SpO2 and pulse rate via photoelectric oxyhemoglobin inspection technology. Uses two light wavelengths (660nm red, 880nm infrared) focused on finger nail tip; photosensitive element captures signal; microprocessor processes data based on Lambert-Beer Law. Displays SpO2, pulse rate, and pulse strength; includes visual/audio alarms for physiological limits and errors. Used in home and hospital environments by clinicians or patients. Communicates via USB or Bluetooth to external computers. Modification of predicate CMS50E adds Bluetooth functionality; core oximetry technology remains unchanged.
Clinical Evidence
No clinical data. Bench testing only. Compliance with IEC 60601-1, IEC 60601-1-2, and ISO 80601-2-61 verified. Wireless transmission performance, data integrity, coexistence, and security tested per FDA guidance.
Technological Characteristics
Battery-powered fingertip device; silicone patient contact material. Sensing: Photoelectric oxyhemoglobin inspection (660nm/880nm). Connectivity: USB and Bluetooth. Safety: IEC 60601-1, IEC 60601-1-2, ISO 80601-2-61. SpO2 range 0-100%; PR range 30-250bpm.
Indications for Use
Indicated for adult patients requiring spot-check or continuous monitoring of SpO2 and pulse rate in home and hospital settings, including surgery, anesthesia, and intensive care.
Regulatory Classification
Identification
An oximeter is a device used to transmit radiation at a known wavelength(s) through blood and to measure the blood oxygen saturation based on the amount of reflected or scattered radiation. It may be used alone or in conjunction with a fiberoptic oximeter catheter.
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
April 23, 2015
Contec Medical Systems Co., Ltd. c/o Ms. Diana Hong General Manager Mid-Link Consulting Co., Ltd. P.O. Box 120-119 Shanghai. 200120 China
Re: K141362
Trade/Device Name: Pulse Oximeter CMS50EW Regulation Number: 21 CFR 870.2700 Regulation Name: Oximeter Regulatory Class: II Product Code: DQA Dated: March 18, 2015 Received: March 23, 2015
Dear Ms. Hong:
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 - Ms. Hong
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 (reporting of medical devicerelated 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 Industry and Consumer Education 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. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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 Industry and Consumer Education 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,
**Tejashri Purohit-Sheth, M.D.** Tejash
Tejashri Purohit-Sheth, M.D. Clinical Deputy Director DAGRID/ODE/CDRH FOR
Erin I. Keith, M.S. Division 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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DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration
## Indications for Use
510(k) Number (if known) K141362
Device Name Pulse Oximeter CMS50EW
## Indications for Use (Describe)
The Pulse Oximeter CMS50EW is a non-invasive device intended for spot-check or continuous monitoring of noninvasive oxygen saturation of arterial hemoglobin (SpO2) and the pulse rate through the finger of adult patients in home and hospital environments (including clinical use internist/surgery, anesthesia, and intensive care settings). The device is reusable and not intended for out-of-hospital transport use.
| <div><span style="text-decoration: underline;"> </span></div> | <div><span style="text-decoration: underline;"></span>Prescription Use (Part 21 CFR 801 Subpart D)</div> |
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| <div><span style="text-decoration: underline;"> </span></div> | <div><span style="text-decoration: underline;"></span>Over-The-Counter Use (21 CFR 801 Subpart C)</div> |
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Type of Use (Select one or both, as applicable)
ing the
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## Tab #1 510(k) Summary
This 510(k) Summary is being submitted in accordance with requirements of SMDA 1990 and Title 21, CFR Section 807.92.
The assigned 510(k) Number: K141362
- 1. Date of Submission: 04/20/2015
- 2. Sponsor Identification
Contec Medical Systems Co., Ltd No.112 Qinhuang West Street, Economic & Technical Development Zone, Qinhuangdao, Hebei, 066004, China.
Establishment Registration Number: 3006979678
Contact Person: Xueyong Li Position: Quality Manager Tel: 86 355 8015489 Fax: 86 355 8015490 Email: lxy1011@163.com
- 3. Submission Correspondent
Ms. Diana Hong & Mr. Tarzan Wang Mid-Link Consulting Co., Ltd P.O. Box 120-119 Shanghai, 200120, China Tel: +86-21-22815850 Fax: 240-238-7587 Email: info@mid-link.net
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- 4. Proposed Device Identification
Proposed Device Name: Pulse Oximeter CMS50EW Proposed Device Model: CMS50EW Proposed Device Common Name: Pulse Oximeter
Regulatory Information: Classification Name: Oximeter; Classification: 2; Product Code: DQA; Regulation Number: 870.2700; Review Panel: Anesthesiology;
Intended Use Statement:
The Pulse Oximeter CMS50EW is a non-invasive device intended for spot-check or continuous monitoring of non-invasive oxygen saturation of arterial hemoglobin (SpO2) and the pulse rate through the finger of adult patients in home and hospital environments (including clinical use internist/surgery, anesthesia, and intensive care settings). The device is reusable and not intended for out-of-hospital transport use.
## న్. Predicate Device Identification
510(k) Number: K090671 Product Name: Pulse Oximeter CMS50E Manufacturer: Contec Medical Systems Co., Ltd
- 6. Device Description
The proposed device, Pulse Oximeter CMS50EW is a battery powered fingertip device, which can display % SpO2, pulse rate value and pulse strength. It is based on digital blood oxygen technology.
The proposed device is composed of power module, signal acquisition module, control and signal processing module. The power source of it is a built-in rechargeable lithium battery. And it has alarm function, to raise the user's attention for exceeding of physiological limit and device error via visual and audio alarming indicator. And the pulse oximeter can communicate with computer by USB data wire and Bluetooth.
The proposed device, Pulse Oximeter CMS50EW, is a modification to the predicate device, CMS50E, cleared under K090671; the modification is to add the blue tooth functionality, however, the oximetry
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technology including the sensor was unchanged.
- 7. Non-Clinical Test Conclusion
Non clinical tests were conducted to verify that the proposed device met all design specifications as was Substantially Equivalent (SE) to the predicate device. The test results demonstrated that the proposed device complies with the following standards:
- > IEC 60601-1:2005 + CORR.1 (2006) + CORR.2 (2007) + AM1 (2012), Medical Electrical Equipment -- Part 1: General Requirements For Basic Safety And Essential Performance.
- A IEC 60601-1-2: 2007, Medical Electrical Equipment - Part 1-2: General Requirements For Basic Safety And Essential Performance - Collateral Standard: Electromagnetic Compatibility -Requirements And Tests.
- A ISO 80601-2-61:2011, Medical electrical equipment - Part 2-61: Particular requirements for basic safety and essential performance of pulse oximeter equipment.
In addition, wireless transmission function test, including wireless transmission performance, data integrity, wireless coexistence, and security of wireless data, was conducted per the FDA guidance, Radio Frequency Wireless Technology in Medical Devices - Guidance for Industry and Food and Drug Administration Staff, issued on January 3, 2007. The test results complied with the acceptance criteria.
- 8. Clinical Test
Clinical testing was not necessary in this submission to support the device modification because the oximetry technology including the sensor is unchanged from the predicate device.
- Substantially Equivalent (SE) Conclusion 9.
The following table compares the DEVICE to the predicate device with respect to intended use, technological characteristics and principles of operation, etc.
| Item | Proposed Device | Predicate Device |
|-------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------|
| Product Code | DQA | Same |
| Regulation No. | 21 CFR 870.2700 | Same |
| Class | 2 | Same |
| Intended Use | The Pulse Oximeter CMS50EW is a non-invasive device<br>intended for spot-check or continuous monitoring of<br>non-invasive oxygen saturation of arterial hemoglobin | Same |
| | (SpO2) and the pulse rate through the finger of adult<br>patients in home and hospital environments (including<br>clinical use internist/surgery, anesthesia, and intensive<br>care settings). The device is reusable and not intended for<br>out-of-hospital transport use. | |
| Features | %SpO2 and PR measurement,<br>Pulse bar, Alarm function,<br>Bluetooth | %SpO2 and PR<br>measurement,<br>Pulse bar, Alarm<br>function, no Bluetooth<br>function. |
| Principles of operation | An experience formula of data process is established<br>taking use of Lambert Beer Law according to Spectrum<br>Absorption Characteristics of Reductive Hemoglobin<br>(Hb) and Oxyhemoglobin (HbO2) in glow &<br>near-infrared zones. Operation principle of the device is:<br>Photoelectric Oxyhemoglobin Inspection Technology is<br>adopted in accordance with Capacity Pulse Scanning &<br>Recording Technology, so that two beams of different<br>wavelength of lights can be focused onto human nail tip<br>through perspective clamp finger-type sensor. Then<br>measured signal can be obtained by a photosensitive<br>element, information acquired through which will be<br>shown on screen through treatment in electronic circuits<br>and microprocessor. | Same |
| Measurement wavelength | Red: 660nm<br>Infrared: 880nm | Same |
| SpO2 range | 0%-100% | Same |
| SpO2 accuracy | 70%~100%:±2%, 0~69%,unspecified | Same |
| PR measurement range | 30bpm~250bpm | Same |
| PR accuracy | $±2bpm$ or $±2%$ (select the larger) | Same |
| Patient Contact | Silicone | Same |
| Material | | |
| Electrical Safety | Comply with IEC 60601-1 | Same |
| EMC | Comply with IEC 60601-1-2 | Same |
| Label and Labeling | Meet FDA's Requirements | Same |
Table 1 Comparison of Technology Characteristics
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The proposed device, Pulse Oximeter CMS50EW, is a modification to the predicate device, CMS50E, cleared under K090671; the modification is to add the blue tooth functionality, however, the oximetry technology including the sensor was unchanged.
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Based on the comparison above, the proposed device, Pulse Oximeter CMS50EW, is determined to be Substantially Equivalent (SE) to the predicate device, Pulse Oximeter CMS50E (K090671).
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.