K073454 · Contec Medical System Co., Ltd. · DQA · May 5, 2008 · Cardiovascular
Device Facts
Record ID
K073454
Device Name
FINGERTIP PULSE OXIMETER, MODEL CMS-50C
Applicant
Contec Medical System Co., Ltd.
Product Code
DQA · Cardiovascular
Decision Date
May 5, 2008
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 870.2700
Device Class
Class 2
Attributes
Pediatric
Indications for Use
Pulse Oximeter CMS-50C is a non-invasive, spot-check, oxygen saturation of arterial hemoglobin (SpO2) and pulse rate of adult and pediatric patient at home, and hospital (including clinical use in internist/surgery, Anesthesia, intensive care and etc). Not for continuously monitoring.
Device Story
Pulse Oximeter CMS-50C is a portable, non-invasive, battery-powered (2 AAA) device for spot-checking arterial hemoglobin oxygen saturation (SpO2) and pulse rate. Used in home and clinical environments (surgery, anesthesia, intensive care) by patients or clinicians. Operation involves inserting a finger into the sensor; device calculates SpO2 and pulse rate, displaying values on an integrated screen. Features include low battery alarm, automatic power-off, and data storage. Provides immediate physiological data to assist in clinical assessment of respiratory status; not for life-supporting or continuous monitoring.
Clinical Evidence
Clinical testing conducted at Beijing Military General Hospital following ISO 9919:2005. Accuracy reported as <±2% in the 70%-99% SpO2 range. Bench testing included electrical safety (IEC 60601-1), electromagnetic compatibility (IEC 60601-1-2), and biocompatibility (ISO 10993).
Technological Characteristics
Non-invasive optical sensor; battery-powered (2 AAA alkaline); portable fingertip form factor. Complies with IEC 60601-1 (electrical safety) and IEC 60601-1-2 (EMC). Biocompatible skin-contact materials per ISO 10993. Non-sterile, reusable transducer.
Indications for Use
Indicated for spot-check of SpO2 and pulse rate in adult and pediatric patients in home and hospital settings. Not for continuous monitoring.
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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# 510(k) Summary
This summary of 510(k) safety and effectiveness information is being submitted in accordance with the requirements of SMDA 1990 and 21 CFR 807.92.
The Assigned 510(k) Number is:
K073454
### 1. Applicant Device Information
Trade/Proprietary Name: Pulse Oximeter CMS-50C Common Name: Oximeter Classification Name: Oximeter Device Class: II Product Code: DQA Regulation Number: 870.2700 Review Panel: Anesthesiology Intended Use:
Pulse Oximeter CMS-50C is a non-invasive, spot-check, oxygen saturation of arterial hemoglobin (SpO2) and pulse rate of adult and pediatric patient at home, and hospital (including clinical use in internist/surgery, Anesthesia, intensive care and etc). Not for continuously monitoring.
### 2. Submitter Information
#### Manufacturer Name:
Contec Medical System Co., LTD. No.2-1 Hengshan Road, Economic and Technical Development Zone Oinghuangdao , Hebei,China, 066000
#### Contact Person of the Submission:
Ms. Diana Hong Mr. Eric Chen Shanghai Mid-Link Business Consulting Co., Ltd Suite 8D, Zhongxin Zhongshan Mansion, No.19, Lane 999, Zhong Shan Nan Er Road Shanghai, China 20020 Phone: +86-21-64264467 x 152 Fax: +86-21-64264468 x 809 Email: Diana.hong(@mid-link.net eric.chen@mid-link.net
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### 3. Predicate Device
Fingertip pulse Oximeter MD300C (K070371)
K-number: K070371
Product Code: DQA
#### Intended Use:
Fingertip Pulse Oximeter MD300C is a portable non-invasive, spot-check, oxygen saturation of arterial hemoglobin (SpO2) and pulse rate of adult and pediatric patient at home, and hospital (including clinical use in internist/surgery, Anesthesia, intensive care and etc). Not for continuously monitoring.
### Manufactured by:
Beijing Choice Electronic Technology Co., Ltd. Bailangyuan Building B 1126-1127, Fuxing Road A36, Beijing , P.R.China, 100039
## 4. Device Description
The pulse oxygen saturation is the percentage of HbO2 in the blood, so-called the O2 concentration in the blood. It is an important bio-parameter for the respiration. Many of the respiration disease will cause hypoxemia, even damage the patient's life. As a result, monitoring the SpO2 is indispensable in the clinical rescuing. The traditional method to measure SpO2 is to analyze the sample of the patient's blood to get the partial pressure of oxygen and calculate the SpQ2 by use the blood-gas analyzer. This method is inconvenient and discontinuous. For the purpose of measuring the SpO2 more easily and accurately, our company developed the Pulse Oximeter. The device can measure the pulse rate simultaneously.
Pulse Oximeter is tiny, and with low power consumption, convenient to use and carry. The You just need to put the into the sensor of the device, the SpO2 value will appear on the screen immediately. In the clinical practice, the tolerance is smaller than ±2% in the range from 70% to 99%.
The applicant device has low battery voltage alarm function, automatically power of function and data storage function. The power source of the applicant device is 2 AAA alkaline.
The applicant device is not for life-supporting or life-sustaining, not for implant. The device or transducers are not sterile and the transducer is reusable and does not need sterilization or re-sterilization. The device is for prescription. The device does contain drug or biological products.
The device is electrically operated and the Electrical Safety Test and Electromagnetic Compatibility Test following IEC 60601-1 and IEC60601-1-2 were conducted. Please see the
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Attachment 2 Electrical Safety and EMC Test.
The Performance Test reports Low-Voltage Alarm System are presented in Attachment 3 Performance Bench Test.
The Clinical Test reports following ISO 9919:2005, Medical electrical equipment - Particular requirements for the basic safety and essential performance of pulse oximeter equipment for medical use are conducted in the lab of Beijing Military General Hospital provided in Attachment 4 Clinical Test Reports.
All applicable standards are listed in Chapter II Standards.
The device is not kit.
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# 5. Effectiveness and Safety Considerations
#### Effectiveness:
The Clinical Test reports following ISO 9919:2005, Medical electrical equipment - Particular requirements for the safety and essential performance of pulse oximeter
The accuracy of CMS-50C pulse oximeter equipment is compliance to the requirement, and the product is safe during the use. It can be used in the clinical environment. It is substantially equivalent to other pulse oximeter product with the same effectiveness and safety.
#### Safety Considerations:
The Performance Test reports Low-Voltage Alarm System are presented in Attachment 3 Performance Bench Test.
The test results of biocompatibility of all the skin-contacting material are presented as Table IV-2 for the consideration of Biological Specifications. Please see Appendix 1 Biocompatibility Reports.
The Biological Evaluation Tests are in compliance with the standards of ISO 10993, "Biological Evaluation of Medical Devices". The compatibility of the skin-contact component material in the finished product meets the requirement of Biocompatibility.
The applicant device is compliance with IEC60601-1, Medical electrical equipment - Part 1: General requirements for safety and IEC60601-1-2, Medical electrical equipment - Part 1-2: General requirements for safety -Collateral standard: Electromagnetic compatibility -. Requirements and tests
The Software Validation is in compliance with FDA Guidance to Compliance with FDA Guidance for the Content of PreMarket Submissions for Software Contained in Medical Devices.
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# 6. Substantially Equivalence Determination
#### Comparison Analysis
The applicant device has same classification informations and intended use, same design principle, similar product design and specifications, same performance effectiveness, performance safety as the predicate device. The only difference is working time Operating temperature, PR display range, Relative humidity, Atmosphere pressure. These differences are slight and do not effluence the effectiveness and safety of the device and don't raise new question of effectiveness and safety.
#### Conclusion:
The applicant device is Substantially Equivalent (SE) to the predicate device which is US legally market device. Therefore, the applicant device is determined as safe and effectiveness.
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DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/5/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo features a stylized eagle with outstretched wings, symbolizing protection and care. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" is arranged in a circular pattern around the eagle. The logo is simple, using a black and white color scheme.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
MAY - 5 2008
Contec Medical System Company, Limited C/O Ms. Diana Hong Official Correspondent Shanghai Mid-Link Business Consulting Company, Limited Suite 8D, Zhongxin Zhongshan Mansion No. 19, Lane 999, Zhong Shan No.2 Road(S) Shanghai CHINA 200030
Re: K073454
Trade/Device Name: Pulse Oximeter CMS-50C Regulation Number: 21 CFR 870.2700 Regulation Name: Oximeter Regulatory Class: II Product Code: DQA Dated: April 29, 2008 Received: April 29, 2008
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.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such 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); 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.
This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Office of Compliance at (240) 276-0115. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). 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) 443-6597 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
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Chiu Lin, Ph.D. Director Division of Anesthesiology, General Hospital, 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): K073454
Device Name: Pulse Oximeter CMS-50C
Indications for Use:
The Pulse Oximeter CMS-50C is a non-invasive device intended for the spot-check of oxygen saturation of arterial hemoglobin (SpO2) and the pulse rate of adult and pediatric patients in home and hospital environments (including clinical use in internist/surgery, anesthesia, intensive care etc.). This device is not intended for continuous monitoring.
Prescription Use (Part 21 CFR 801 Subpart D) AND/OR
Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Nini Ch
(Division Sign-Off) Division of Anesthesiology, General Hospital Infection Control, Dental Devices
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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.