The AC-1 Adapter Cables, 8 pin and 12 pin Philips used with Masimo LNOP Sensors are intended for an SpO2 sensor for adult, pediatric, infant, and neonatal patients in hospital-type facilities, mobile, and home environments for the monitoring of functional oxygen saturation of arterial hemoglobin and pulse rate.
Device Story
AC-1 Adapter Cable (8-pin and 12-pin) serves as interface between Masimo LNOP sensors and Philips pulse oximeter monitors; enables non-invasive optical assessment of tissue oxygenation. Device transmits signals from sensors to monitor; allows clinician to view real-time SpO2 and pulse rate data. Used in hospital, mobile, and home settings to facilitate continuous patient monitoring; assists healthcare providers in clinical decision-making regarding patient oxygenation status. Benefits include reliable, continuous monitoring of arterial hemoglobin saturation across all patient populations.
Clinical Evidence
Clinical studies performed using AC-1 Adapter Cables with Masimo LNOP sensors on human subjects subjected to progressive induced hypoxia. Arterial blood samples measured via CO-Oximeter. Results demonstrated SpO2 accuracy of <2% Arms in 70%-100% range for standard sensors, and <3.5% Arms for LNOP TC-I sensors.
Technological Characteristics
Adapter cable for pulse oximetry; 8-pin and 12-pin configurations for Philips monitors. Operates via non-invasive optical assessment (emitters/detectors). Constructed of materials equivalent to predicate devices. Connectivity: wired interface between sensor and monitor.
Indications for Use
Indicated for continuous noninvasive monitoring of functional oxygen saturation of arterial hemoglobin (SpO2) and pulse rate in adult, pediatric, infant, and neonatal patients in hospital, mobile, and home environments.
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
MAY 11 2005 KOSQ2252
Image /page/0/Picture/2 description: The image shows the logo for Masimo, a medical technology company. Below the logo, the address "40 Parker, Irvine, CA 92618" is printed. The phone number "949-297-7000" and fax number "949-297-7001" are also listed.
| Submitted by: | Masimo Corporation<br>40 Parker<br>Irvine, CA 92618<br>(949) 297-7218<br>FAX (949) 297-7001 |
|---------------------------------------|---------------------------------------------------------------------------------------------|
| Company Contact: | James J. Cronin, Vice President, Regulatory Affairs/Quality Assurance |
| Date Summary Prepared: | April 16, 2005 |
| Trade Name | AC-1 Adapter Cable, 8 Pin and 12 Pin Philips |
| Common Name | Cable, Transducer and Electrode |
| Classification Name and Product Code: | Cable, Transducer and Electrode (74DSA) (870.2900) |
| Substantially Equivalent Devices: | AC-1 Adapter Cable - K033349 |
#### Device Description
The AC-1 Adapter Cable, 8 pin and 12 pin Philips is fully compatible oximetry cable that allows the MacDon The AC-1 Adapter Cable, o pur and 12 pm Introl of the cable represents a design change to the Masimo AC-1.
The AC-1 Adapter Cable, 8 pin and 12 pin Philips is similar in construction to the predicate device enabling the Masimo LNOP The AC-T Adapter Cubter Cable, o pin and compatible pulse oximeter monitors from Philips.
### Intended Use
The AC-1 Adapter Cables, 8 pin and 12 pin Philips used with Masimo LNOP Sensors are intended for an Sm(), sensor for adult The AC-1 Adapter Cables, 8 pm and 12 pm I milips used with history of the environmed by an SpO-sensor) for adult,
monitoring of functional oxygen saturation of arterial hemog monitoring of tunctional oxygen saturation of interior neinegoeds (1) in the environments.
### Technology Comparison
The AC-1 Adapter Cables, 8 pin and 12 pin Philips used with Masimo LNOP Sensors are substantially equivals of non-invasyve The AC-1 Adapter Cables, o pin and 12 pm Philips ased williends in Crice Censer and operate on identical principles of non-invasive optical assessment of tissue oxygenation using emitters and detectors.
The AC-1 Adapter Cable is designed, and manufactured for full compatibility with Nellcor and Nelloor compatible The AC-1 Adapter Cable is designed, and manufacturer for roll computed of smilar materials and components of equivalent specifications as used in the predicate devices.
175
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## 510(k) SUMMARY
The accuracy of the AC-1 Adapter Cables used with Masino LNOP Sensors is equivalent to those of the predicate devices.
#### Performance Testing
Environmental Testing
Applicable environmental testing per the Reviewers Guidance for Premarket Submissions - November 1993, i.e. Applicable environmental were performental were performed and all tests passed
#### Clinical Testing
Clinical studies were performed using the AC-1 Adapter Cables, 8 pin and 12 pin Philips used with Masimo LNOPP Clinical sudies were performed using the RC-1 Adapts, or poston conditions who were subjected to apcogressive oximelly sensors on neasuring the arterial hemoglobin saturation value with the instruments against the alterial induced hypoxia and measuring the arterial blood samples with a CO-Oximeter. Clinical testing of the LNOP sensors nemoglobin 03ygen delemilied in an accuracy of less than 2% Spoz Agas in the range of 70%-100% Sales I NOP TC I (except the LNOF TC-1) resulted in an accuracy of toss that a sepatal sensors. Clinical testing of the LNOP TC-I
added to account for the properties of fetal hemoglobin for t added to account for the soft less than 3.5% SpO2 Arms in the range of 70% -100%.
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Image /page/2/Picture/1 description: The image shows the seal of the U.S. Department of Health and Human Services. The seal features a stylized eagle with three stripes extending from its head, representing health, services, and people. The words "DEPARTMENT OF HEALTH AND HUMAN SERVICES . USA" are arranged in a circular pattern around the eagle.
## MAY 1 1 2005
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Mr. James J. Cronin Mice President, Regulatory Affairs/Quality Assurance Masimo Corporation 40 Parker Irvine, California 92618
Re: K050252
Trade/Device Name: AC-1 Adapter Cable, 8 Pin and 12Pin Phillips Regulation Number: 870.2700 Regulation Name: Oximeter Regulatory Class: II Product Code: DQA Dated: April 18, 2005 Received: April 21, 2005
Dear Mr. Cronin:
We have reviewed your Section 510(k) premarket notification of intent to market the device we nave reviewed your because mined the device is substantially equivalent (for the relerenced above and have and in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device mendments, or to devices that have been reclassified in accordance with the provisions of Amendinents, or to do rovies that natio Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general approvin uppreation (1 the Act. The general controls provisions of the Act include controls provisions of the manual 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 If your device is classified (oos as additional controls. Existing major regulations affecting (FMA), it may be subject to back addr of Federal Regulations, Title 21, Parts 800 to 898. In your device can or tound in the Seas nouncements concerning your device in the Federal Register.
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Page 2 - Mr. Cronin
Please be advised that FDA's issuance of a substantial equivalence determination does not Please be advisod that 1 DTC s ibstained on that your device complies with other requirements Incall that ITA has made a detectand regulations administered by other Federal agencies. of the Act of ally I edelar statutes and regisements, including, but not limited to: registration You must comply with an the Her b recess required (1); good manufacturing practice and listing (21 CFR Purt 007), laceling (21 CFR Part 820), and if requirements as set forth in the quality by seems (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) This letter will anow you to begin mailitimal equivalence of your device to a premiarket notification. - The PDF 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), il you desire specific advice tor your de 100 2002 276-0120. Also, please note the regulation prease contact the Other or Ochiphian premarket notification" (21CFR Part 807.97). You may obtain other general information on your responsibilities under the Act from the may obtain other general missmallers, International and Consumer Assistance at its toll-free DIVIsion of Binar-2041 or (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
Carls
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):
AC-1 Adapter Cable, 8 pin and 12 pin Philips Device Name:
Indications For Use:
The AC-1 Adapter Cable, 8 pin and 12 pin Philips is indicated for the continuous noninvasive monitoring of flunctic oxygen saturation of arterial hemoglobin (SpQ2) and pulse rate (measured by an SpO3 sensor) for use will, adult, pediatric, infant, and neonatal patients in hospital-type facilities, mobile, and home environments.
Prescription Use J X (Per 21 CFR 801 Subpart D) AND/OR
Over-The-Counter Use _ (Per 21 CFR 807 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Cura Sullom
(Division Sian-K Division of Anesthe Infection Control, De
510(k) Number:
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.