The APK SpO2 Pulse Oximeter Sensor (Resuable) is intended for spot checking or continuous monitoring of functional arterial oxygen saturation and pulse rate in non-invasive with oximeter equipment, which are intended for adult or pediatric patients (more than 5kg) in hospital-type facilities, and home environments. The APK SpO2 Pulse Oximeter Sensor (Disposable) is intended for Disposable when continuous noninvasive arterial oxygen saturation and pulse rate monitoring are adults or pediatric patients (more than 5kg) in hospital-type facilities, and home environments.
Device Story
Non-invasive pulse oximeter sensors (reusable and disposable) measure arterial oxygen saturation (SpO2) and pulse rate. Sensors emit red and infrared light through tissue (e.g., finger); a photodiode receives non-absorbed light. Signals are transmitted to a host oximeter device, which amplifies the signal and uses an algorithm to calculate the ratio of oxygenated to total hemoglobin based on light absorption. Used in hospitals and home environments by clinicians or patients. Output is displayed on the host oximeter to assist in monitoring patient oxygenation status.
Clinical Evidence
Clinical testing performed in accordance with ISO 9919:2005. Performance testing conducted to verify electrical safety and electromagnetic compatibility per IEC 60601-1 and IEC 60601-1-2. Performance testing completed with intended oximeter equipment.
Technological Characteristics
Red and infrared LED light sources; photodiode receiver. Configurations include finger clip, soft, and wrapping types. Electrical safety and EMC compliant with IEC 60601-1 and IEC 60601-1-2. Non-sterile. Not software-driven (sensor component only).
Indications for Use
Indicated for spot checking or continuous monitoring of functional arterial oxygen saturation and pulse rate in adult and pediatric patients (>5kg) in hospital and home settings.
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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# Chapter III 510(k) Summary
APR - 3 2009
This summary of 510(k) safety and effectiveness information is being submitted in accordance with the requirements of SMDA 1990 and 21 CFR 9807.92.
The Assigned 510(k) Number is:
K082846
#### 1. Applicant Device Information
Device Common Name: SpO2 Pulse Oximeter sensor Device Trade/Proprietary Name:
- APK Sp()2 Pulse Oximeter Sensor (Reusable) a.
- APK SpO2 Pulse Oximeter Sensor (Disposable) b.
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Classification Information:
- (1) Classification Name: Oximeter
- (2) Regulation Number:870.2700
- (3) Product Code: DQA
- (4) Class: II
- (5) Review Panel: Anesthesiology
# 2. Submitter Information
# Manufacturer Name and Address
APK Technology Co., Ltd 6C, C2 Building, Industru of HengFeng Hezhou, Xixiang, Baoan District Shenzhen, Guangdong, 518126,China Contact Person of the Submission Ms. Diana Hong Shanghai Mid-Link Business Consulting Co., Ltd Suite 8D, Zhongxin Zhongshan Mansion, No.19, Lane 999, Zhong Shan Nan Er Road Shanghai, China, 20030
III-1
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Premarket Notification 510(k) Chapter III 510(k) Summary Report No .: TE20080917
Phone: +86-21-64264467 Fax:760-466-5084 Email: Diana.hong(@mid-link.net
3. Predicate Device
Epic SpO2 Sensor-Model#E412-20(K002223) Manufactured by: Epic Medical Equipment Services,Inc. 1800 E. 10th Street, Suite 300 Plano, TX 75074
#### 4. Device Description
4.1 The basic technology principle
The applicant sensor APK SpO2 Pulse Oximeter Sensor (Reusable and Disposable) measure, non-invasively, the arterial oxygen saturation of blood. The measurement method is based on the red and infrared light absorption of hemoglobin and oxyhemoglobin. Light of a red and infrared light source is emitted through human tissue and received by a photodiode.
The measurement is based on the absorption of light, which is emitted through human tissue (for example through the index finger). The light comes from two sources (red LED and infrared LED) with different wavelengths and is received by a photodiode. Out of the different absorption behavior of the red and infrared light a so-called ratio can be calculated. The saturation value is defined by the percentage ratio of the oxygenated hemoglobin [HbO2] to the total amount of hemoglobin [Hb].
SpO2 = [HbO2]/([Hb+[HbO2]]
Those sensors contain a red and infrared light source and a photodiode receiving the non-absorbed red and infrared light. The received signals are forwarded to a measurement device that amplifies the acquired signal and an algorithm that calculates the ratio and converts via a validated calibration table the ratio to a saturation value.
The device is not software-driven.
The applicant sensors are not for implant. Those sensors are not sterile and do not need sterilization or re-sterilization. The device is for prescription. The device does contain drug or biological product.
4.2 The description of Reusable series SpO2 sensor
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The Reusable series SpO2 sensor include 65 kinds of models. The mainly difference of each model SpO2 sensor included in Reusable Series SpO2 Sensors is the appearance , intended lay user and matched oximeter equipment.
We can understand that surface difference as the configuration difference, which of the Reusable series SpO2 sensor can separate into three parts as finger clip type, soft type and wrapping type. Althought the sensor have difference in surface and configuration, but all of models in the Reusable series SpO2 sensor have the same technology principle and raw material.
The Reusable series SpO2 sensor have two kinds of intended population, adult and pediatric.
The Reusable series SpO2 sensor have several kinds of matched oximeter equipment, for match those equipment, Reusable series SpO2 sensor have completed the performance test with intended oximeter.
4.3 The description of Disposable series SpO2 sensor
The Disposable series SpO2 sensor include 2 kinds of models. The mainly difference of each model SpO2 sensor included in Disposable Series SpO2 Sensors is the appearance , intended lay user and matched oximeter equipment.
The Disposable series SpO2 sensor have two kinds of intended population, adult and pediatric.
The Disposable series SpO2 sensor have several kinds of matched oximeter equipment, for match those equipment, Disposable series SpO2 sensor have completed the performance test with intended oximeter.
#### 4.4 Test Description
The Reusable and Singe Use series SpO2 sensor are electrically operated and the electrical safety and electromagnetic compatibility following IEC 60601-1 and IEC60601-1-2.
All the information about the device performance were provided.
The Clinical Test Report following ISO 9919:2005, Medical electrical equipment-Particular requirements for the basic safety and essential performance of pulse oximeter
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equipment for medical use.
# 5. Intended Use
- 5.1 the Intended Use of APK SpO2 Pulse Oximeter sensor (Reusable)
The APK SpO2 Pulse Oximeter Sensor (Resuable) is intended for spot checking or continuous monitoring of functional arterial oxygen saturation and pulse rate in non-invasive with oximeter equipment, which are intended for adult or pediatric patients (more than 5kg) in hospital-type facilities, and home environments.
- 5.2 the Intended Use of APK SpO2 Pulse Oximeter Sensor (Disposable)
The APK SpO2 Pulse Oximeter Sensor (Disposable) is intended for Disposable when continuous noninvasive arterial oxygen saturation and pulse rate monitoring are adults or pediatric patients (more than 5kg) in hospital-type facilities, and home environments.
#### 6. Substantially Equivalence Determination
#### Comparison Analysis
The Reusable and Disposable SpO2 sensor have same classification information, same indications and intended use, same design principle, similar product design and specifications, same performance effectiveness, performance safety as the predicate device. The only difference is Operating temperature, PR Measuring range, Atmosphere pressure.
#### 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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Image /page/4/Picture/0 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a stylized eagle with three stripes forming its body and wings. The eagle is positioned within a circular border that contains the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" in a sans-serif font. The text is arranged around the circumference of the circle.
# DEPARTMENT OF HEALTH & HUMAN SERVICES
Public Health Service
APR - 3 2009
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
APK Technology Company, Limited C/o Ms. Diana Hong General Manager Shanghai Midlink Business Consulting Company, Limited Suite 8D, Zhongxin Zhongshan Mansion Number 19, Lane 999, Zhong Shan Nan Er Road Shanghai, CHINA 20030
Re: K082846
Trade/Device Name: APK Sp02 Pulse Oximeter Sensor (Reusable) APK Sp02 Pulse Oximeter Sensor (Disposable) Regulation Number: 21 CFR 870.2700 Regulation Name: Oximeter Regulatory Class: II Product Code: DQA Dated: March 19, 2009 Received: March 23, 2009
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 (OS) 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 Center for Devices and Radiological Health's (CDRH's) Office of Compliance at (240) 276-0120. Also, please note the regulation entitled. "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometric's (OSB's) Division of Postmarket Surveillance at 240-276-3474. For questions regarding the reporting of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at 240-276-3464. 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 (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours.
Sybilte Y. Michaud md.
Ginette Y. Michaud, M.D. Acting 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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# Indication for Use
510(k) Number (if known): __
Device Name: APK SpO2 Pulse Oximeter sensor (Reusable)
Indications for Use:
The APK SpO2 Pulse Oximeter sensor (Reusable) is intended for spot checking or continuous monitoring of functional arterial oxygen saturation and pulse rate in non-invasive with oximeter equipment, which are intended for adult or pediatric patients (more than 5kg) in hospital-type facilities, and home environments.
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 OF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Page _1_ of _2
Susan Ruape
(Division Sign-Off) Division of Anesthesiology, General Hospital Infection Control, Dental Devices
510(k) Number: KC180846
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# Indication For Use
510(k) Number (if known):
Device Name: APK SpO2 Pulse Oximeter sensor (Disposable)
Indications for Use:
The APK SpO2 Pulse Oximeter sensor (Disposable) is intended for single use when continuous noninvasive arterial oxygen saturation and pulse rate monitoring are adults or pediatric patients (more than 5kg) in hospital-type facilities, and home environments.
Prescription Use J (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 OF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Susan Carey
(Division Sign-Off) Division of Anesthesiology, General Hospital Infection Control, Dental Devices
510(k) Number: K082846
Page 2 of 2
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.