RAINBOW ADHESIVE CO-OXIMETRY SENSOR, MODELS RI-25-L, RI-25, RI-20 AND RI-20-L
Applicant
Masimo Corporation
Product Code
DQA · Cardiovascular
Decision Date
Sep 9, 2008
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 870.2700
Device Class
Class 2
Attributes
Pediatric
Indications for Use
The Rainbow Adhesive Sensors are indicated for the continuous noninvasive monitoring of functional oxygen saturation of arterial hemoglobin (SpO2), pulse rate, carboxyhemoglobin saturation (SpCO), methemoglobin saturation (SpMet), and/or total hemoglobin (SpHb). The Rainbow Adhesive Sensors are indicated for use with adult, pediatric, and neonatal patients during both no motion and motion conditions, and for patients who are well or poorly perfused in hospitals, hospital-type facilities, mobile, and home environments.
Device Story
Disposable adhesive sensors; attach to finger, hand, foot, or toe; interface with Masimo Rainbow SET pulse CO-Oximeter monitors. Utilize 12-wavelength optical emitters and detectors to measure tissue light absorption; noninvasive assessment of hemoglobin species and pulse rate. Used by clinicians or patients in hospitals, mobile, or home environments. Output displayed on compatible monitor; provides real-time physiological data for clinical decision-making regarding oxygenation and hemoglobin status. Benefits include continuous monitoring without invasive blood sampling.
12-wavelength optical sensor; disposable adhesive form factor for finger/hand/foot/toe attachment. Compatible with Masimo Rainbow SET monitors. Materials identical to predicate K071024. Non-sterile, single-patient use. Operates via noninvasive optical tissue assessment.
Indications for Use
Indicated for continuous noninvasive monitoring of SpO2, pulse rate, SpCO, SpMet, and/or SpHb in adult, pediatric, and neonatal patients. Applicable for patients with good or poor perfusion, under motion or no-motion conditions, in hospital, mobile, or 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
Rainbow DCI and Direct Connect Pulse CO-Oximetry Sensors (K080238)
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K081659
# 510(k) SUMMARY
## SEP 0 9 2008
| Submitted by: | Masimo Corporation<br>40 Parker<br>Irvine, CA 92618<br>949-297-7000<br>FAX 949-297-7001 |
|---------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Company Contact: | Marguerite Thomlinson, Manager of Regulatory Affairs |
| Date Summary Prepared: | June 9, 2008 |
| Trade Name | Rainbow Adhesive Pulse CO-Oximeter Sensors |
| Common Name | Oximeter Sensor |
| Classification Name and Product Code: | Oximeter (74DQA) (870.2700)<br>Cable, Transducer and Electrode (74DSA) (870.2900)<br>Carbon Monoxide Test System (JKS) (862.3220) |
| Substantially Equivalent Devices: | Masimo Rainbow SET Radical 7/ Rad 87/ Rad 57t Pulse<br>CO-Oximeters and Accessories, 510(k) Number K080238<br>Masimo Rainbow Adhesive CO-Oximetry Sensors,<br>510(k) Number K071024 |
#### Device Description
The Rainbow Adhesive Sensors are fully compatible disposable sensor for use with Masimo Rainbow SET and Masimo Rainbow SET compatible pulse CO-Oximeter monitors. They represent a design change to the Masimo Rainbow DCI and Direct Connect (Reusable) Sensors in the K080238 filing and the Rainbow Adhesive CO-Oximetry Sensors in the K071024 filing.
The Rainbow Adhesive Sensors in this filing have the same intended use/indications for use and performance specifications as the Rainbow Reusable Sensors in the K080238 filing. However, The Rainbow Adhesive Sensors in this filing are similar in construction to the Rainbow Adhesive CO-Oximetry Sensors in the K071024 filing. The main difference is that the sensors in the K071024 filing have 8wavelengths and the sensors in this filing have 12-wavelengths.
Similar to the 8-wavelength sensors in this filing include the emitter and detector assemblies connecting to the flex circuit, and an adhesive bandage to allow the sensor to be attached to the patient's finger, hand, foot or toe. Sensor sizing for use with adult, pediatric, infant, and neonatal patients are the
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## 510(k) SUMMARY
same for the sensors in the K071024 and for the sensors in this filing. The patient-contact materials in the Rainbow Adhesive Sensors in this filing are the same that is used in the K071024 filing. Also similar to the sensors in the K071024 filing, the Rainbow Adhesive Sensors in this filing are supplied non-sterile for single patient use.
#### Predicate Devices
Rainbow DCI and Direct Connect Pulse CO-Oximetry Sensors (K080238) and Rainbow Adhesive CO-Oximetry Sensors (K071024).
#### Intended Use
The Rainbow Adhesive Sensors are indicated for the continuous noninvasive monitoring of functional oxygen saturation of arterial hemoglobin (SpO₂), pulse rate, carboxyhemoglobin saturation (SpCO), methemoglobin saturation (SpMet), and/or total hemoglobin (SpHb). The Rainbow Adhesive Sensors are indicated for use with adult, pediatric, and neonatal patients during both no motion and motion conditions, and for patients who are well or poorly perfused in hospital-type facilities, mobile, and home environments.
### Technology Comparison
The Rainbow Adhesive Sensors are substantially equivalent in intended use, design, principles of operation, materials, and performance to predicate sensors and operate on identical principles of noninvasive optical assessment of tissue oxygenation using emitters and detectors.
The Rainbow Adhesive Sensors are designed, configured, and manufactured for full compatibility with Masimo Rainbow SET and Masimo Rainbow SET compatible pulse CO-Oximeters. The Rainbow Adhesive Sensors are constructed of similar materials and components of equivalent specifications as used in the predicate devices.
The accuracy of the Rainbow Adhesive Sensors is equivalent to those of the predicate devices.
#### Performance Testing
#### Biocompatibility
Test results of all patient-contact materials used in the Rainbow Adhesive Sensors demonstrated that the materials were non-toxic, non-irritating, and non-sensitizing.
#### Environmental
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
Clinical studies were performed using Masimo Rainbow SET technology with Rainbow Adhesive Sensors on healthy adult volunteer subjects during motion conditions who were
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# 510(k) SUMMARY
subjected to a progressive induced hypoxia and measuring the arterial hemoglobin saturation value with the instruments against the arterial hemoglobin oxygen determined from arterial blood samples with a laboratory CO-Oximeter.
Clinical testing of the Rainbow Adhesive sensors resulted in an accuracy of less than 2% SpO2 Авмя in the range of 70%-100% SaO2 and less than 3% SpO2 AcMs in the range of 60%-80% SaO2 for adults, pediatrics, and infants.
The Masimo Rainbow SET technology with Rainbow Adhesive Sensors have been validated in human blood studies on adult volunteers against a laboratory CO-Oximeter from 1-40% for carboxyhemoglobin, 1-15% for methemoglobin, and 8-17 g/dL for total hemoglobin. Clinical testing of the Rainbow Adhesive sensors resulted in an accuracy of less than 3% SpCO Aggs in the range of 1%-40% SaCO, an accuracy of less than 1% SpMet Aggs in the range of 1%-15% SaMet, and an accuracy of less than 1 g/dL SpHb ARMs in the range of 8-17 g/dL tHb.
Additional clinical studies were performed using Masimo Rainbow SET technology with Rainbow Adhesive Sensors on hospitalized neonatal patients resulted in an accuracy of less than 3% SpO2 ARMs in the range of 70%-100% SaO2 and less than 1% SpMet ARMs in the range of 0% -2.5% SaMet.
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Image /page/3/Picture/1 description: The image shows the seal of the Department of Health & Human Services (HHS) of the United States. The seal features a stylized eagle with its wings spread, clutching a staff entwined with a serpent. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES. USA" is arranged in a circular pattern around the eagle.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
SEP 0 9 2008
Ms. Marguerite Thomlinson Manager of Regulatory Affairs Masimo Corporation 40 Parker Irvine, California 92618
Re: K081659
Trade/Device Name: Rainbow Adhesive Pulse CO-Oximeter Sensors Regulation Number: 21 CFR 870.2700 Regulation Name: Oximeter Regulatory Class: II Product Code: DQA, JKS, DPZ Dated: August 28, 2008 Received: September 2, 2008
Dear Ms. Thomlinson:
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. Thomlison
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 Center for Devices and Radiological Health's (CDRH's) Office of Compliance at (240) 276-0115. 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,
Thimothy Penley
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):
Device Name: Rainbow Adhesive Pulse CO-Oximeter Sensors
Indications For Use:
The Rainbow Adhesive Sensors are indicated for the continuous noninvasive monitoring of functional oxygen saturation of arterial hemoglobin (SpO2), pulse rate, carboxyhemoglobin saturation (SpCO), methemoglobin saturation (SpMet), and/or total hemoglobin (SpHb). The Rainbow Adhesive Sensors are indicated for use with adult, pediatric, and neonatal patients during both no motion and motion conditions, and for patients who are well or poorly perfused in hospitals,
hospital-type facilities, mobile, and home environments.
shl
(Division Sign-Off) Division of Anesthesiology, General Hospital Infection Control, Dental Devices
510(k) Number: K081659
| Prescription Use _X_ | AND/OR | Over-The-Counter Use _ |
|--------------------------------|--------|--------------------------------|
| (Per 21 CFR 801.109 Subpart D) | | (Per 21 CFR 801.109 Subpart C) |
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
### Concurrence of CDRH, Office of Device Evaluation (ODE)
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.