The Delphi Amplifier is intended to be used by or under the direction of a physician for acquisition of EEG signals and to transmit them digitally to a computer. The device is intended for use on humans. The device is intended for use in a clinical environment (e.g., hospital, physician's office, etc.). The device is not intended for use in life support systems.
Device Story
Mobile EEG recording device; acquires EEG signals via referential DC input channels and parallel trigger input channels. Connects to external computer via USB; powered by USB connection. Operates in clinical environments under physician direction. Provides raw EEG data to external software via SDK/signal driver interface. Enables impedance measurement for electrodes. Facilitates EEG signal acquisition and digital transmission to computer for clinical analysis. Benefits patient by enabling diagnostic EEG monitoring.
Clinical Evidence
Bench testing only. Testing included IEC 60601-1 (general safety), IEC 60601-1-2/60601-2-26/IEC TR 60601-4-2 (EMC/performance), IEC 60601-1-6 (usability), and IEC 80601-2-26. Additional verification included 24-hour data packet loss stress tests, 3160 hours of continuous reliability testing, and software/firmware validation. Performance metrics (CMRR >100 dB, input noise <0.9 uV p-p) confirmed equivalent to predicate.
Technological Characteristics
Mobile EEG amplifier; 48 referential channels; 8-bit trigger input. 24-bit resolution; true DC input. USB-powered. Sampling rates: 125-2000 Hz (all channels), up to 50,000 Hz (reduced montage). CMRR >100 dB. Input impedance >10^8 Ohm. Connectivity: USB interface to PC via SDK. Standards: IEC 60601-1, IEC 60601-1-2, IEC 60601-1-6, IEC 60601-2-26, IEC 80601-2-26.
Indications for Use
Indicated for acquisition of EEG signals in humans in clinical environments (hospitals, clinics, physician offices) under physician direction. Not for use in life support systems.
Regulatory Classification
Identification
A physiological signal amplifier is a general purpose device used to electrically amplify signals derived from various physiological sources (e.g., the electroencephalogram).
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March 12, 2025
Image /page/0/Picture/1 description: The image shows the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health & Human Services logo. To the right of that is the FDA logo, which consists of the letters "FDA" in a blue square, followed by the words "U.S. FOOD & DRUG ADMINISTRATION" in blue text.
QuantalX Neuroscience % Bosmat Friedman-Cox Regulatory Consultant ProMedoss, Inc. 6026 Beech Cove Ln. Charlotte, North Carolina 28269
Re: K243746
Trade/Device Name: Delphi Amplifier Regulation Number: 21 CFR 882.1835 Regulation Name: Physiological Signal Amplifier Regulatory Class: Class II Product Code: GWL Dated: December 5, 2024 Received: February 14, 2025
Dear Bosmat Friedman-Cox:
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 (the 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. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database available at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. 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.
Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device"
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(https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download).
Your device is also subject to, among other requirements, the Quality System (QS) regulation (21 CFR Part 820), which includes, but is not limited to, 21 CFR 820.30. Design controls; 21 CFR 820.90. Nonconforming product; and 21 CFR 820.100, Corrective and preventive action. Please note that regardless of whether a change requires premarket review, the OS regulation requires device manufacturers to review and approve changes to device design and production (21 CFR 820.30 and 21 CFR 820.70) and document changes and approvals in the device master record (21 CFR 820.181).
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-related adverse events) (21 CFR Part 803) for devices or postmarketing safety reporting (21 CFR Part 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050.
All medical devices, including Class I and unclassified devices and combination product device constituent parts are required to be in compliance with the final Unique Device Identification System rule ("UDI Rue"). The UDI Rule requires, among other things, that a device bear a unique device identifier (UDI) on its label and package (21 CFR 801.20(a)) unless an exception or alternative applies (21 CFR 801.20(b)) and that the dates on the device label be formatted in accordance with 21 CFR 801.18. The UDI Rule (21 CFR 830.300(a) and 830.320(b)) also requires that certain information be submitted to the Global Unique Device Identification Database (GUDID) (21 CFR Part 830 Subpart E). For additional information on these requirements, please see the UDI System webpage at https://www.fda.gov/medical-devices/device-advicecomprehensive-regulatory-assistance/unique-device-identification-system-udi-system.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
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Sincerely,
Image /page/2/Picture/3 description: The image shows the name "Patrick Antkowiak -S" in black text. To the left of the name is a light blue FDA logo. The text is aligned to the left and the logo is slightly transparent.
for Jay Gupta Assistant Director DHT5A: Division of Neurosurgical, Neurointerventional, and Neurodiagnostic Devices OHT5: Office of Neurological and Physical Medicine Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
{3}------------------------------------------------
# Indications for Use
510(k) Number (if known) K243746
Device Name Delphi Amplifier
## Indications for Use (Describe)
The Delphi Amplifier is intended to be used by or under the direction of a physician of EEG signals and to transmit them digitally to a computer. The device is intended for use on humans. The device is intended for use in a clinical environment (e.g., hospital, physician's office, etc.). The device is not intended for use in life support systems.
| Type of Use (Select one or both, as applicable) |
|--------------------------------------------------------------------------------------|
| <input checked="true" type="checkbox"/> Prescription Use (Part 21 CFR 801 Subpart D) |
| <input type="checkbox"/> Over-The-Counter Use (21 CFR 801 Subpart C) |
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Image /page/4/Picture/0 description: The image shows the logo for Quantalx Neuroscience. The word "Quantalx" is written in a bold, sans-serif font. Below the word "Quantalx" is the word "Neuroscience" written in a smaller, purple font. The word "Neuroscience" is surrounded by two purple dots.
Traditional 510(k)
510(k) Summary
## 510(k) Summary [Traditional 510(k)] Delphi Amplifier - K243746
## SUBMITTER 1
## Applicant's Name:
QuantalX Neroscience 1 Hatachana St. Kfar-Saba Israel
# Primary Contact:
Bosmat Friedman Regulatory Affairs Consultant 6026 Beech Cove Ln. Charlotte, NC 28269 Phone: 980-308-1636 bosmat.f(@promedoss.com
## Date Prepared: February 14, 2025
## Trade Name:
Delphi Amplifier
| Classification Code: | Device: Amplifier, Physiological Signal |
|----------------------|-----------------------------------------|
| | Product Code: GWL |
| | Regulation No: 882.1835 |
| | Class: 2 |
| | Review Panel: Neurology |
### 2 PREDICATE DEVICE
# Primary Predicate:
- eego amplifiers. Product code: GWL, cleared under: K172312. .
#### 3 DEVICE DESCRIPTION
The Delphi Amplifier has been designed as a mobile recording device for EEG (electroencephalography) signals. It provides access to recorded data over a USB connection to external software over its signal driver interface. The Delphi Amplifier is powered via a USB connection and does not require any additional power source. The Delphi Amplifier supports EEG acquisition and storage by Referential DC input channels, and Parallel trigger input channels.
The Delphi Amplifier enables connection of up to 48 referential channels and 8bit trigger input channel. Impedance values can be measured for all referential electrodes as well as the reference. An SDK (Software Development Kit) is available for direct amplifier communication.
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| Quantalx<br>• Neuroscience • | Delphi Amplifier | |
|------------------------------|--------------------|----------------|
| | Traditional 510(k) | 510(k) Summary |
The device is powered by the USB port connection to a computer. The USB port supports interface to the computer running the SDK.
#### INDICATIONS FOR USE ব
The Delphi Amplifier is intended to be used by or under the direction of a physician for acquisition of EEG signals and to transmit them digitally to a computer. The device is intended for use on humans. The device is intended for use in a clinical environment (e.g., hospital, physician's office, etc.). The device is not intended for use in life support systems.
#### റ SUBSTANTIAL EQUIVALENCE
The Delphi Amplifier is substantially equivalent to the predicate device based on the following:
#### 6 INTENDED USE
The intended use of the proposed device is the same as that of the cleared device.
#### 7 TECHNOLOGY
The Delphi Amplifier device has similar overall technological characteristics as the predicate eego amplifier cleared under K172312. Both devices are comprised of an amplifier unit provided with the Software Development Kit (SDK) and accompanying user manuals for both components. Both devices are prescription devices intended to be used in a clinical environment by connecting to a PC and FDA cleared electrodes to acquire EEG signals.
| | Subject Device | Predicate Device | Comparison |
|---------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------|
| Attribute | Delphi Amplifier | Eego Amplifier | |
| 510(k) Number | NA | K172312 | -- |
| Classification | GWL | GWL | Same |
| Regulation Number | 882.1835 | 882. 1835 | Same |
| Intended Use | Used to electrically amplify signals derived from electroencephalogram | Used to electrically amplify signals derived from electroencephalogram. | Same |
| Indications for use | The Delphi Amplifier is intended to be used by or under the direction of a physician for acquisition of EEG signals and to transmit them digitally to a computer. The device is intended for use on humans. The device is intended for use in a clinical environment (e.g., hospital, physician's office, etc.). The device is not intended for use in life support systems. | The eego amplifier is intended to be used by or under the direction of a physician for acquisition of EEG signals and to transmit them digitally to a computer. The device is intended for use on humans. The device is intended for use in a clinical environment (e.g., hospital, physician's office, etc). The device is not intended for use in life support systems. | Same |
| Type of use | Prescription Use | Prescription Use | Same |
| Modes of Operation | Connected to a PC and FDA cleared electrodes to acquire EEG signals | Connected to a PC and FDA cleared electrodes to acquire EEG signals | Same |
| Use Environment | Clinical environment (hospital, clinic, physician's office, etc.) | Clinical environment (hospital, clinic, physician's office, etc.) | Same |
| Filter | Low pass filtering in amplifier | Low pass filtering in amplifier | Same |
| Sampling rate | 125, 250, 500, 1000, 2000 Hz @ all channels<br>5000 Hz @ 24 FEG monopolar or | EE-2XX Series:<br>Up to 16384 Hz Set through the user interface of the Software Development | Equivalent; Delphi Amplifier can be configured to higher |
{6}------------------------------------------------
Traditional 510(k)
510(k) Summary
| Attribute | Subject Device | Predicate Device | Comparison |
|-----------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------|
| | Delphi Amplifier | Eego Amplifier | |
| | bipolar channels<br>10000 Hz @ 16 EEG monopolar or<br>bipolar channels<br>50000 Hz @ 4 EEG monopolar or<br>bipolar channels<br>set through SDK | Kit (SDK) software<br>EE-4XX Series: Up to 2048 Hz | sampling rate in<br>reduced montage. |
| Amplifier CMRR<br>(referential) | >100 dB | >100 dB | Same |
| Amplifier Input<br>Channels | Up to 48 | Up to 64 | Similar; while<br>Delphi has less input<br>channels, there are<br>various FDA cleared<br>devices with 16-128<br>input channels. |
| Amplifier input<br>impedance<br>(referential) | >108 Ohm | >109 Ohm | Equivalent for low<br>impedance of<br>physiological signal<br>inputs. |
| Amplifier power | USB from Computer | EE-2XX Series: Rechargeable<br>integrated battery<br>EE-4XX Series: USB from Computer | Same as EE-4xx<br>model |
| Resolution and<br>input stage | 24-bit, true DC input for all channels | 24-bit, true DC input for all channels,<br>one A/D converter per channel | Similar |
| Input noise<br>(referential) | < 0.9 uV p-p (lowest sampling rate and<br>signal range) | <1.0 µVRMS (lowest sampling rate and<br>signal range) | Equivalent |
| Amplifier<br>referential DC<br>input channels | Yes | Yes | Equivalent |
| Amplifier trigger<br>input | Yes | Yes | Equivalent |
| Amplifier trigger<br>input channel | Yes | Yes | Equivalent |
| Amplifier USB<br>interface | Yes | Yes | Equivalent |
| PC interface | SDK (API) | SDK (API) | Equivalent |
#### 8 DISCUSSION
Based on the comparison presented in our submission, the Delphi Amplifier shares the same indications for use as its predicate, as both are intended to be used by or under the direction of a physician for acquisition of EEG signals and to transmit them digitally to a computer. Additionally, while some technological differences do exist between the subject device and its predicate, testing have demonstrated that the device is substantially equivalent to its predicate and that the technological differences do not raise new safety and effectiveness concerns and support the company's substantial equivalency claim.
#### 9 PERFORMANCE DATA
The Amplifier underwent successful nonclinical bench tests to establish substantially equivalent performance. The tests are summarized below:
{7}------------------------------------------------
Traditional 510(k)
510(k) Summary
| Test | Test Method Summary | Results |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------|
| Particular requirements for the basic safety<br>and essential performance of<br>electroencephalographs | Per IEC 80601-2-26 and IEC 60601-2-26 | Pass |
| Medical electrical equipment - Part 1:<br>General requirements for basic safety and<br>essential performance | Per IEC 60601-1 | Pass |
| Medical electrical equipment - Part 1-6:<br>General requirements for basic safety and<br>essential performance - Collateral standard:<br>Usability | Per IEC 60601-1-6 | Pass |
| Medical electrical equipment: Part 1-2<br>General requirements for basic safety and<br>essential performance. Collateral Standard:<br>electromagnetic disturbances- Requirements<br>and tests. | Per IEC 60601-1-2, 60601-2-26 and<br>IEC TR 60601-4-2 | Pass |
| System Design Requirement | Stress test assessing data packet loss<br>over 24 hours as well as long term<br>registration test over 24 hours | No errors<br>encountered. Test<br>passed |
| Reliability testing | Multiple units tested for reliability<br>over 3160 hours of continuous use.<br>Quality checks performed every 24<br>hours and main characteristics checked<br>every 1000 hours. | Pass |
| Delphi amplifier software and firmware<br>testing | Software and firmware testing to<br>ensure device operates per<br>specifications. | Pass |
| System performance testing | Supplemental testing to IEC 80601-2-<br>26 which included Common-mode<br>rejection ratio, Noise Test and<br>Impedance test | Pass |
The results of the bench testing support the safety profile of the device and demonstrate that the device functions as intended.
# 10 CONCLUSION
The Delphi Amplifier has similar intended use, technological characteristics, and principles of operation as the predicate. Any differences between the subject and predicate device were evaluated through design verification and validation testing which demonstrated device performance and safety, and do not raise any new questions of safety and effectiveness. Based on the information submitted in this 510(k), the Delphi Amplifier is substantially equivalent to the predicate eego Amplifiers.
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Part 1 — Search, results, and everyday workflows 16 min
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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.
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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.
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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.
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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.
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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.
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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.
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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.