The AC -1 Adapter Cables used with Masimo LNOP Sensors are intended for the continuous noninvasive monitoring of functional oxygen saturation of arterial hemoglobin (SpO3) and pulse rate (measured by an SpO2 sensor) for adult, pediatic, infant, and neonatal patients in hospitals, hospital-type facilitics, mobile, and home environments.
Device Story
AC-1 Adapter Cable serves as interface between Masimo LNOP sensors and Nellcor-compatible pulse oximeter monitors; enables signal transmission from sensor to monitor; used in hospitals, mobile, and home environments; operated by clinicians or patients; facilitates noninvasive optical assessment of tissue oxygenation; output displayed on monitor for clinical decision-making regarding patient oxygenation status.
Clinical Evidence
Clinical studies conducted on adult subjects under induced hypoxia conditions. Accuracy of AC-1 Adapter Cables with Masimo LNOP sensors compared against CO-Oximeter arterial blood samples. Results demonstrated SpO2 accuracy of <2% ARMS (70%-100% range) for adults, pediatrics, and infants, and <3% ARMS for neonates.
Technological Characteristics
Adapter cable for pulse oximetry; connects Masimo LNOP sensors to Nellcor-compatible monitors. Materials and components equivalent to predicate devices. Operates via non-invasive optical assessment using emitters and detectors. Electrical, mechanical, and environmental testing performed per 1993 Reviewers Guidance.
Indications for Use
Indicated for continuous noninvasive monitoring of functional arterial hemoglobin oxygen saturation (SpO2) and pulse rate in adult, pediatric, infant, and neonatal patients in hospital, mobile, 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.
Predicate Devices
Masimo SET Radical Pulse Oximeter with SatShare and LNOP series of Sensors and Cables (K031330)
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Image /page/0/Picture/0 description: The image shows the logo for Masimo, along with their address and contact information. The address is 2852 Kelvin Avenue, Irvine, CA 92614. The phone number is 949-250-9688, and the fax number is 949-250-9686. There is also a number K033349 written on the top left of the image.
# 510(k) SUMMARY
JAN 2 8 2004
| Submitted by: | Masimo Corporation<br>2852 Kelvin Ave<br>Irvine, CA 92614-5826<br>(714) 250-9688<br>FAX (714) 250-9686 |
|---------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Company Contact: | James J. Cronin, Vice President, Regulatory Affairs/Quality Assurance |
| Date Summary Prepared: | October 17, 2003 |
| Trade Name | AC-1 Adapter Cable |
| Common Name | Cable, Transducer and Electrode |
| Classification Name and Product Code: | Cable, Transducer and Electrode (74DSA) (870.2900) |
| Substantially Equivalent Devices: | Masimo SET <sup>®</sup> Radical Pulse Oximeter with SatShare <sup>™</sup> and LNOP <sup>®</sup> series of Sensors and<br>Cables<br>510(k) Number - K031330<br>Nellcor N-395 Pulse Oximeter - K991823<br>Nellcor N-200 Pulse Oximeter - K863784 |
#### Device Description
The AC-1 Adapter Cable is fully conpatible oximetry cable that allows the use of Masimo LNOP Sensors with Nellow and Nellcor compatible pulse oximeter monitors. The cable represents a design change to the Masino patient cables.
The AC-1 Adapter Cable is similar in construction to the predicate device enabling the Masimo LNOP Sensors to be comected to Nelleor and Nellcor compatible pulse oximeter monitors.
### Intended Use
The AC -1 Adapter Cables used with Masimo LNOP Sensors are intended for the continuous noninvasive monitoring of functional oxygen saturation of arterial hemoglobin (SpO3) and pulse rate (measured by an SpO2 sensor) for adult, pediatic, infant, and neonatal patients in hospitals, hospital-type facilitics, mobile, and home environments.
### Technology Comparison
I'he AC-1 Adapter Cables used with Masimo LNOP Sensors are substantially equivalent in intended use, design, principles of operation, materials, and performance to predicate sensors and operate on identical principles of non-invasive optical assessment of tissue oxygenation using emitters and detectors.
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## 510(k) SUMMARY
The AC-1 Adapter Cable is designed, configured, and manufactured for full compatibility with Nellcor compatible The AC-1 Adapter cable is dongiled, comigated, and the constructed of similar materials and components of equivalent specifications as used in the predicate devices.
The accuracy of the AC-1 Adapter Cables used with Masimo LNOP Sensors is cquivalent to those of the prodicale devices.
#### Performance Testing
Environmental Testing
Applicable environmental testing per the Reviewers Guidance for Premarket Submissions - November 1993, i.e. electrical, mechanical and environmental were performed and all tests passed
#### Clinical Testing
Clinical studies were performed using the AC-1 Adapter Cables used with Masimo I.NOP Adult oximetry sensors on Challed studios were permined as a motion conditions who were subjected to a progressive induced lypoxia and measuring the arterial hemoglobin saturation value with the instruments against the arterial hemoglobin oxygen determined from arterial blood samples with a CO-Oximeter. Clinical testing of the SPO2.COM Adult and Reusable sensors resulted in an accuracy of less than 2% SpO2 Arsss in the range of 70%-100% SaO2 for adults, pediatrics and infants and less than 3% ARMS for neonates.
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Image /page/2/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo features a stylized eagle with three stripes forming its body and wings. The eagle is enclosed in a circle, with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" surrounding the top half of the circle.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
## JAN 2 8 2004
Mr. James J. Cronin Vice President, Regulatory Affairs/Quality Assurance Masimo Corporation 2852 Kelvin Avenue Irvine, California 92614-5826
Re: K033349
Trade/Device Name: AC-1 Adapter Cable Regulation Number: 870.2700 Regulation Name: Oximeter Regulatory Class: II Product Code: DQA, DPZ Dated: January 21, 2004 Received: January 22, 2004
Dear Mr. Cronin:
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 - Mr. James J. Cronin
Please be advised that FDA's issuance of a substantial equivalence determination does not Please be advised that I DA 3 issualled of a basedan in that your device with other requirements mean that FTA has made a decermination administered by other Federal agencies. of the Act of ally receral statutes and regalates. Including, but not limited to: registration You must comply with an the Hee Here (21 CFR Part 801); good manufacturing practice and ifsing (21 CFR Part 067), lacelity systems (QS) regulation (21 CFR Part 820); and if
requirements as set forth in the quality systems (QS) regulation (21 CFR Part 612 requirements as set form in the quality bysteins (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 mationing of substantial equivalence of your device to a premiarket notification. The PDF intents 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), If you desire specific advice to: Jour de at (301) 594-4646. Also, please note the regulation in 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 may obtain other general micrinational and Consumer Assistance at its toll-free Division of Binastic of Binastic (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html.
Sincerely yours,
Clair Liu, Ph.D.
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
#### K033349 510(k) Number (if known):
AC-1 Adapter Cable Device Name:
Indications For Use:
The AC-1 Adapter Cable with Masimo sensors are indicated for the continuous noninvasive monitoring of functional r no re a readion of arterial hemoglobin (SpO₂) and pulse rate (measured by an SpO₂ sensor) for use with adult, pediatic, infant, and neonatal patients in hospitals, hospital-type facilities, mobile, and home environments.
Prescription Use __ 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)
S. Hinkle
Division of Anesthesiology, General Hospital,
510(k) Number: k633349
0027
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.