Hospitalized post-surgical patient medical records/clinical monitoring data
Clinical validation of the acoustic respiratory rate monitoring sensor was performed using data from hospitalized post-surgical adult and pediatric patients to demonstrate accuracy compared to manual respiratory rate counts.
Clinical validation in hospitalized post-surgical subjects; Non-randomized clinical validation study
Hospitalized post-surgical adult and pediatric subjects; Sample Size: 26 adult subjects; 26 pediatric subjects; Number of Sites: 3 hospital centers in the United States (pediatric study)
Manual count of respiratory rate
Respiratory rate accuracy
Indications for Use
The Rainbow Acoustic Monitoring™ sensors and cables are indicated for continuous, noninvasive monitoring of respiratory rate (RRaTM). The RAS-125 is indicated for adult patients in hospital-type facilities, mobile and home environments. The RAS-125c is indicated for adult and pediatric patients in hospital-type facilities, mobile and home environments.
Device Story
Masimo Acoustic Monitoring Sensor (RAS-125/RAS-125c) is a single-patient use piezoelectric sensor; attaches to patient's neck via adhesive strip. Device captures acoustic signals from upper airway; transmits data via cable to compatible Masimo pulse oximeter monitors (e.g., Radical 7, Rad 87). Monitor processes acoustic input to calculate and display continuous respiratory rate (RRa). Used in hospital, mobile, and home settings; operated by clinicians or patients/caregivers. Provides real-time respiratory rate data to assist healthcare providers in patient monitoring; enables continuous assessment of respiratory status; facilitates timely clinical intervention.
Clinical Evidence
Clinical validation included three non-randomized studies: healthy adult volunteers (n=26), hospitalized post-surgical adults (n=26), and hospitalized post-surgical pediatric subjects (n=26). Primary endpoint was respiratory rate accuracy compared to manual counts. Validated range: 4-70 breaths/min (bench); clinical validation up to 30 breaths/min (adults >30 kg) and 50 breaths/min (pediatrics >10 kg, age ≥2 years). Accuracy reported as ± 1 breath per minute.
Technological Characteristics
Piezoelectric sensor element; adhesive neck attachment. Single-patient use. Connectivity via cable to compatible Masimo pulse oximeter monitors. Complies with ISO 14971 (risk management), EN ISO 10993 (biocompatibility), ISO 9919 (safety/mechanical), IEC 60601-1 (electrical safety), and IEC 60601-1-2 (EMC).
Indications for Use
Indicated for continuous, noninvasive respiratory rate monitoring in adult and pediatric patients (> 10 kg) in hospital, mobile, and home environments. Contraindicated in patients with allergies to foam rubber or adhesive tape. Not validated for infants, neonates, or patients with asthma, COPD, or cystic fibrosis.
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: K120984
# APR 2 6 2013
| Submitter: | Masimo Corporation<br>40 Parker<br>Irvine, CA 92618<br>Phone: (949) 297-7000<br>FAX: (949) 297-7592 |
|---------------------------|---------------------------------------------------------------------------------------------------------|
| Contact: | Patricia Milbank<br>Vice President, Regulatory Affairs |
| Date Summary<br>Prepared: | April 23, 2013 |
| Trade Name: | Masimo Acoustic Monitoring Sensors (adult/pediatric) |
| Common Name: | Pulse Oximeter |
| Classification Name: | DQA - Oximeter (870.2700)<br>BZQ - Breathing frequency monitor (868.2375) |
| Predicate Device: | K091241 – Masimo Rainbow SET® Rad-87 Pulse CO-Oximeter<br>and Masimo Acoustic Monitoring Sensor (adult) |
# Description of the Device
The Masimo Acoustic Monitoring Sensor is a single-patient use device consisting of a piezoelectric sensor element and an adhesive strip that is attached to the patient's neck for the purpose of noninvasive respiratory rate monitoring in adult and pediatric patients (> 10 kg). As with the predicate Masimo Acoustic Monitoring Sensor (model RAS-125 for adults only), the RAS-125c for pediatric patients is intended to be attached via cable to a pulse oximeter monitor incorporating the Masimo Rainbow® Acoustic Monitoring™ technology to provide a continuous display of the patient's acoustic respiratory rate. Suitable pulse oximeter monitors include the previously cleared Radical 7 and Rad 87 devices.
#### Indications for Use
The Rainbow Acoustic Monitoring™ sensors and cables are indicated for continuous, noninvasive monitoring of respiratory rate (RRaTM).
The RAS-125 is indicated for adult patients in hospital-type facilities, mobile and home environments.
The RAS-125c is indicated for adult and pediatric patients in hospital-type facilities, mobile and home environments.
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# Contraindications
The RAS-125 and RAS-125c sensors are contraindicated in patients who exhibit allergic reactions to foam rubber products and/or adhesive tape.
# Results from Clinical Studies
Accuracy data was obtained from a comparison of a manual count of respiratory rate in healthy adult subjects and in hospitalized pediatric subjects for whom post-operative monitoring of respiratory rate was indicated.
Respiration rate accuracy for the Rainbow Acoustic Monitoring sensor and instrument has been validated for the range of 4 to 70 breaths per minute in bench top testing. Clinical validation was performed with the RAS-125 and RAS-125c sensors and instrument for up to 30 breaths per minute in adult subjects >30 kg, and up to 50 breaths per minute in hospitalized pediatric subjects, age 2 years or older and >10kg.
| | RAS-125 | RAS-125c |
|------------------------------------------------------------|-------------------------------|-------------------------------|
| <span style="vertical-align: middle;"> </span> Body Weight | Adult > 30 kg | Adult, Pediatric > 10 kg |
| Application Site | Neck | Neck |
| Breaths per Minute,<br>Accuracy Range* | 4 to 70 ± 1 breath per minute | 4 to 70 ± 1 breath per minute |
The accuracy of this device has not been validated for monitoring of respiratory rate in patients with specific medical conditions, e.g., asthma, COPD or cystic fibrosis. Accuracy of the sensor has not been validated in infants or neonates.
# Test Summary
The RAS-125 and RAS-125c sensors comply with the voluntary standards as detailed in Section 9 of this submission and the following quality assurance, verification and validation measures were included in the development process:
- Design control activities per 21 CFR 820 .
- Risk analysis and risk management activities per ISO 14971 .
- Software verification and validation testing per 21 CFR 820 and the applicable FDA . guidance documents (General Principles of Software Validation, Guidance for the Content of Premarket Submissions for Software Contained in Medical Devices, and Off-The-Shelf Software Use in Medical Devices)
- Biocompatibility testing per EN ISO 10993 for patient skin contacting, prolonged . duration materials, including cytotoxicity, skin irritation and sensitization
- Environmental testing (operating temperature, humidity, fluid ingress), safety and . mechanical testing per ISO 9919
- Electromagnetic compatibility per IEC 60601-1-2 .
- Electrical safety testing per IEC 60601-1 �
- Two non-randomized clinical validation studies in healthy adult volunteers (n=26) and .
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hospitalized post-surgical adult subjects (n=26)
- A non-randomized clinical validation study in hospitalized post-surgical pediatric . subjects (n=26), conducted at 3 hospital centers in the United States .
#### Conclusion
The information in this 510(k) submission demonstrates that the Masimo RAs-125 and RAS-125c Acoustic Respiration Sensors are substantially equivalent to the predicate device, with respect to safety, effectiveness, and performance, when used in adult and pediatric patients.
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#### DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/3/Picture/1 description: The image shows the logo for the Department of Health & Human Services - USA. The logo is a circular seal with the words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is an emblem featuring a stylized eagle or bird-like figure with three curved lines representing its wings or feathers.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
### April 26, 2013
Ms. Patricia Milbank Vice President, Regulatory Affairs Masimo Corporation 40. Parker_ IRVINE CA 92618
Re: K120984
Trade/Device Name: Masimo Acoustic Respiration Sensor (Adult/Pediatric) Regulation Number: 21 CFR 870.2700 Regulation Name: Oximeter Regulatory Class: II Product Code: DQA, BZA Dated: March 13, 2013 Received: March 14, 2013
Dear Ms. Milbank:
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. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to 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. Milbank
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); medical device reporting (reporting of medical devicerelated adverse events) (21 CFR 803); 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.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Small Manufacturers, International and Consumer Assistance at its tollfree number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm. Also, please note
the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
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) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm.
Sincerely yours.
Digitally signed by Mary 5. Runner -5
ON: c=US, o=U.S. Government,
ou-HHS, ou=FDA, ou=People,
Susan Runner, DOSMA cn=Mary 5. Runner -S,
0.9.2342.19200300.100.1.1=13000879
50
Date: 2013.04.26 07:26:55 -04'00'
for
Anthony D. Watson, B.S., M.S., M.B.A. Director
Division of Anesthesiology, General Hospital, Respiratory, 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: K120984
Masimo Acoustic Respiration Sensor (Adult/Pediatric) Device Name: ________
Indications for Use:
The Rainbow Acoustic Monitoring™ sensors and cables are indicated for continuous, noninvasive monitoring of respiratory rate (RRaTM).
The RAS-125 is indicated for adult patients in hospital-type facilities, mobile and home environments.
The RAS-125c is indicated for adult and pediatric patients in hospital-type facilities, mobile and home environments.
Prescription Use X (Part 21 CFR 801 Subpart D)
Over-The-Counter Use AND/OR (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)
Chan O. Lee -S
2013.04.25 14:13:49
-04'00' For LS
thesiology, General Hospital on Control, Dental Devices
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.