BIS STANDARD SENSOR,1-CHANNEL (3 ELECTRODES); BIS PEDI SENSOR,1-CHANNEL,3 ELECTRODES; BIS QUATRO SENSOR; BIS PEDI-XP SENSOR,2-CHANNEL (4 ELECTRODES); BIS EXTEND SENSOR; BIS BILATERAL SENSOR,4-CHANNEL (6 ELECRODES); BIS INSIGHT SENSOR,CVI-ENABLED,2-CHANNEL (4 ELECTRODES)
BIS STANDARD SENSOR,1-CHANNEL (3 ELECTRODES); BIS PEDI SENSOR,1-CHANNEL,3 ELECTRODES; BIS QUATRO SENSOR; BIS PEDI-XP SENSOR,2-CHANNEL (4 ELECTRODES); BIS EXTEND SENSOR; BIS BILATERAL SENSOR,4-CHANNEL (6 ELECRODES); BIS INSIGHT SENSOR,CVI-ENABLED,2-CHANNEL (4 ELECTRODES)
Applicant
Covidien
Product Code
GXY · Neurology
Decision Date
Apr 16, 2015
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 882.1320
Device Class
Class 2
Indications for Use
The BIS Sensor is applied directly to the patient's skin to enable recordings of electrophysiological (such as EEG) signals.
Device Story
BIS Sensors are disposable, single-patient-use, low-impedance cutaneous electrodes applied to the patient's forehead and temple. The sensor array features a 'zipprep' design with flexible tines and hydrogel to part the outer skin layer and establish a conductive bridge. A silver/silver-chloride circuit on a mylar substrate transmits EEG signals to a Covidien BIS Monitor. The monitor processes these differential signals to calculate the Bispectral Index (BIS) value. The sensor includes an integrated smart card memory chip for identification and usage tracking. Used in clinical settings, the device facilitates EEG signal acquisition, which healthcare providers use to monitor patient brain activity and guide clinical decision-making, such as assessing depth of anesthesia.
Clinical Evidence
Bench testing only. Evidence includes electrical testing per AAMI EC12:2000, shelf-life validation, and biocompatibility testing (cytotoxicity, irritation, and sensitization). All results were reported as acceptable.
Technological Characteristics
Disposable, pre-gelled 4-electrode array. Materials: polyethylene basepad, polyurethane foam disk, aqueous hydrogel, silver/silver-chloride ink on mylar substrate, polyester insulation. Features 'zipprep' flexible tines for skin contact. Includes electronic smart card memory. Connectivity: wired connection to BIS monitor. Standards: AAMI EC12:2000, ISO 14971:2007.
Indications for Use
Indicated for patients requiring electrophysiological (EEG) signal monitoring via cutaneous electrodes applied to the frontal/temporal area.
Regulatory Classification
Identification
A cutaneous electrode is an electrode that is applied directly to a patient's skin either to record physiological signals (e.g., the electroencephalogram) or to apply electrical stimulation.
Predicate Devices
Aspect Medical Systems BIS Quatro (and Extend) Sensor (K093183)
Aspect Medical Systems BIS Bilateral Sensor (K062692)
Aspect Medical Systems BIS Pediatric Sensor (K041670)
Submission Summary (Full Text)
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Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services. The logo features a stylized representation of three human profiles facing right, stacked on top of each other. The profiles are rendered in a dark color, possibly black or a dark shade of gray. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" is arranged in a circular fashion around the profile graphic.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
April 16, 2015
Covidien Timothy Holwick Sr. Regulatory Affairs Specialist 6135 Gunbarrel Avenue Boulder, CO 80301
Re: K143506
> Trade/Device Name: Covidien BIS Sensors (BIS Quatro Sensor, BIS Extend, BIS Pediatric Sensor, BIS Bilateral Sensor) Regulation Number: 21 CFR 882.1320 Regulation Name: Cutaneous Electrode Regulatory Class: Class II Product Code: GXY Dated: March 13, 2015 Received: March 16, 2015
Dear Mr. Holwick.
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.
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 of medical device
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related 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 Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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 Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours,
Felipe Aquel - S
for
Carlos L. Peña. PhD. MS Director Division of Neurological and Physical Medicine Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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## Indications for Use
510(k) Number (if known) K143506
## Device Name
Covidien BIS Sensors (BIS Quatro Sensor, BIS Extend, BIS Pediatric Sensor, BIS Bilateral Sensor)
Indications for Use (Describe)
The BIS Sensor is applied directly to the patient's skin to enable recordings of electrophysiological (such as EEG) signals.
Type of Use (Select one or both, as applicable)
X Prescription Use (Part 21 CFR 801 Subpart D)
| Over-The-Counter Use (21 CFR 801 Subpart C)
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BIS Sensor Gel Reformulation Traditional 510(k)
Prepared: November 21, 2014
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| Device Name: | The device trade name and common classification names are : | | | | | | |
|---------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|--|--|--|--|--|
| | Device Trade Name Common/Classification Name BIS Quatro Sensor, BIS Extend, BIS<br>Pediatric Sensor, BIS Bilateral Sensor Common Name: Electrode, Cutaneous<br>Electrode | | | | | | |
| Address and<br>Registration #: | The address and registration number of the manufacturer and sterilization<br>sites for both catheters are: | | | | | | |
| | Manufacturer Contract Manufacturer Covidien<br>6135 Gunbarrel Ave<br>Boulder, CO 80301 Celestica Electronics PTE LTD.<br>6 Serangoon North Avenue 5 #05-03/04<br>Singapore Central Singapore, Singapore 554910 FDA Registration #:<br>2636999 FDA Registration #:<br>3008202779 | | | | | | |
| Device Class: | Cutaneous Electrodes have been classified by the Neurological Devices Panel<br>as Class II, 84 GXY. No performance standards have been established under<br>Section 514 of the Food, Drug and Cosmetic Act for Cutaneous Electrodes<br>(21 CFR 882.1320). | | | | | | |
| Predicate Device<br>Information | Note: Predicate clearances were filed under the technology's previous owner,<br>Aspect Medical Systems Inc., which was thereafter acquired by Covidien.<br>Predicate devices still meet the required element of a Special 510(k) that the<br>proposed changes be based on the company's existing technology as<br>Covidien now owns these technologies.<br><br>Aspect Medical Systems BIS Quatro (and Extend) Sensor K093183,<br>concurrence date October 23, 2009<br>Aspect Medical Systems BIS Bilateral Sensor K062692, concurrence date<br>December 13, 2006.<br>Aspect Medical Systems BIS Pediatric Sensor K041670, concurrence date<br>July 6, 2004<br><br>A reference to multiple predicates is intended to illustrate that the<br>reformulated sensor gel will be used with all four current BIS sensors. No<br>changes have been made to the sensors themselves outside the interaction<br>with the reformulated gel. | | | | | | |
| Labeling | There are no changes in the labeling or Instructions for Use from the<br>predicate devices. | | | | | | |
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BIS Sensor Gel Reformulation Traditional 510(k) Prepared: November 21, 2014
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| Intended Use<br>/Indications for<br>Use | The BIS Sensor is applied directly to the patient's skin to enable recordings of<br>electrophysiological (such as EEG) signals. |
|-----------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Device<br>Description and<br>Comparison | The BIS Sensor, generally speaking with regard to the four variations of the<br>sensor, is a rectangular shaped, pre-gelled array of four zipprep electrodes<br>that is applied to the patient's skin to record electrophysiological signals, such<br>as EEG signals.<br>It is a low impedance, single patient use, disposable electrode sensor designed<br>for application to the frontal/temporal area. The sensor is designed to provide<br>ease of use and electrode placement accuracy. It is in conjunction with<br>Covidien BIS Monitors.<br>The body of the sensor houses three (3) electrodes which are placed on the<br>forehead, and a fourth electrode placed over the temple area. The sensor<br>collects EEG signals from these areas, and the differential signals from the<br>temple and above the eye relative to the center of the forehead are used to<br>calculate the Bispectral Index (BIS) value.<br>The "zipprep" design is constructed using flexible tine disks placed in pockets<br>on a polyethylene basepad. A polyurethane foam disk and hydrogel is placed<br>over the tines. The basepad has a medical grade pressure sensitive adhesive<br>for adhering to the skin. A mylar substrate with conductive silver / silver<br>chloride ink circuit is adhered to the other side of the basepad. The flexible<br>tines, surrounded by hydrogel, are used to part the outermost layer of skin.<br>While the flexible tines part the skin, hydrogel flows around the tines and<br>forms a conductive bridge with the skin. The silver / silver chloride circuit<br>provides signal continuity from each electrode (gel/tine/foam) to the monitor.<br>A polyester insulation is used to restrict electrical contact to the electrode<br>area.<br>The sensor connects to the monitor at a single point (paddle tab) that is low<br>profile and easy to insert and remove. The tab has an electronic smart card<br>memory device that contains identification information (date of manufacture,<br>number of connections, lot number).<br>Each sensor is presented on a silicone liner tray and packed in individual<br>heat-sealed pouches. Twenty-five (25) sealed pouches are packed into a<br>cardboard box. |
303-305-2400 [T]
,在第一次
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BIS Sensor Gel Reformulation Traditional 510(k) Prepared: November 21, 2014
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| Substantial<br>Equivalence | This 510(k) is being submitted for modification to the 510(k) cleared sensors<br>listed in the predicate section above. The gel formulation of the aqueous<br>hydrogel is being changed.<br><br>This change does not result in any changes to the hazard analysis. A<br>summary of test results, which includes testing to AAMI standard<br>EC12:2000, shelf life testing, and biocompatibility tests for Cytotoxicity,<br>Irritation, and Sensitization is enclosed. All testing results are considered<br>acceptable.<br><br>Covidien has concluded that the device is substantially equivalent to the<br>predicate devices, with specific regard to the gel, and is safe and effective for<br>its intended use. |
|--------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Summary of<br>Design Control<br>Activities | Risk analysis was conducted per ISO 14971: 2007 – Medical devices –<br><i>Application of risk management to medical devices</i> . The design verification<br>tests that were performed as a result of this risk analysis are listed in table #1<br>on the following page.<br><br>The test methods used are the same as those submitted in the original<br>submission. |
| Summary of Testing | |
The following testing was conducted in support of this submission:
- Electrical Testing ●
- Shelf Life Testing .
- Biocompatibility .
、
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.