This device is intended for use in surgical procedures to assist in locating and mapping motor nerves through the use of mechanomyographic (MMG) signals and electrical stimulus of nerves. The device provides information directly to the surgeon to help assess a patient's neurophysiologic status by measuring and comparing MMG signals throughout a surgical procedure. The device is intended to identify relative changes in the conduction and neural transmission ability of the nerve throughout a surgical procedure by measuring and comparing the minimum amount of electrical stimulation current (mA) required to induce a measurable MMG response (MMG nerve response threshold). Examples of surgical applications which may require mechanomyographic (MMG) monitoring: • Minimally invasive and open spinal surgery involving spinal fusion cages, screws, rods, plates, discs and biologics. • Minimally invasive, open and endoscopic, direct and indirect nerve decompressions, discectomies, laminectomies, laminotomies, facetectomies, foraminotomies. • Treatment of nerve compression, stenosis, degenerative disc disease, disc herniation, spondylolisthesis.
Device Story
Neuralytix iD3 System is a multichannel surgical nerve stimulator/locator; inputs include mechanomyographic (MMG) signals from accelerometer sensors placed on muscles and operator-applied electrical stimulation; device transforms inputs by measuring MMG response to electrical current; outputs include real-time MMG signal graphs and nerve response thresholds (mA) displayed on a touchscreen; used in OR by surgeons during spinal/nerve decompression procedures; provides objective data on nerve conduction/transmission status; assists surgeons in identifying nerves and monitoring neural integrity; helps prevent nerve injury during surgery.
Clinical Evidence
Bench testing only. No clinical data. Performance validated via comparative performance evaluation using clinically relevant MMG signal simulation (positive/negative waveforms) showing >99% agreement with predicate. Biocompatibility testing (ISO 10993) confirmed non-cytotoxic, non-sensitizing, and non-irritant status for patient-contacting components.
Indicated for use in surgical procedures to assist in locating and mapping motor nerves in patients undergoing spinal or nerve decompression surgeries (e.g., discectomy, laminectomy, fusion) by monitoring MMG signals and nerve response thresholds.
Regulatory Classification
Identification
A surgical nerve stimulator/locator is a device that is intended to provide electrical stimulation to the body to locate and identify nerves and to test their excitability.
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FDA U.S. FOOD & DRUG ADMINISTRATION
June 26, 2025
Neuralytix, LLC
Christopher Wybo
CEO
138 S Park Square
Ste 203
Fruita, Colorado 81521
Re: K243636
Trade/Device Name: Neuralytix iD3 System (NTX-9001)
Regulation Number: 21 CFR 874.1820
Regulation Name: Surgical Nerve Stimulator/Locator
Regulatory Class: Class II
Product Code: PDQ, ETN
Dated: May 27, 2025
Received: May 27, 2025
Dear Christopher Wybo:
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.
U.S. Food & Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993
www.fda.gov
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K243636 - Christopher Wybo
Page 2
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" (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 QS 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 (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-reporting-combination-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 Rule"). 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-advice-comprehensive-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-devices/medical-device-safety/medical-device-reporting-mdr-how-report-medical-device-problems.
For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medical-devices/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-devices/device-advice-comprehensive-regulatory-
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K243636 - Christopher Wybo
Page 3
assistance/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).
Sincerely,

Patrick
Antkowiak -S
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
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FORM FDA 3881 (6/20)
Page 1 of 1
PSC Publishing Services (301) 443-6740
EF
| DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration Indications for Use | Form Approved: OMB No. 0910-0120 Expiration Date: 06/30/2023 See PRA Statement below. |
| --- | --- |
| 510(k) Number (if known) K243636 | |
| Device Name Neuralytix iD3 System | |
| Indications for Use (Describe) This device is intended for use in surgical procedures to assist in locating and mapping motor nerves through the use of mechanomyographic (MMG) signals and electrical stimulus of nerves. The device provides information directly to the surgeon to help assess a patient's neurophysiologic status by measuring and comparing MMG signals throughout a surgical procedure. The device is intended to identify relative changes in the conduction and neural transmission ability of the nerve throughout a surgical procedure by measuring and comparing the minimum amount of electrical stimulation current (mA) required to induce a measurable MMG response (MMG nerve response threshold). Examples of surgical applications which may require mechanomyographic (MMG) monitoring: • Minimally invasive and open spinal surgery involving spinal fusion cages, screws, rods, plates, discs and biologics. • Minimally invasive, open and endoscopic, direct and indirect nerve decompressions, discectomies, laminectomies, laminotomies, facetectomies, foraminotomies. • Treatment of nerve compression, stenosis, degenerative disc disease, disc herniation, spondylolisthesis. | |
| Type of Use (Select one or both, as applicable) ☑ Prescription Use (Part 21 CFR 801 Subpart D) ☐ Over-The-Counter Use (21 CFR 801 Subpart C) | |
| CONTINUE ON A SEPARATE PAGE IF NEEDED. | |
| This section applies only to requirements of the Paperwork Reduction Act of 1995. *DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW.* | |
| The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to: Department of Health and Human Services Food and Drug Administration Office of Chief Information Officer Paperwork Reduction Act (PRA) Staff PRAStaff@fda.hhs.gov | |
| "An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number." | |
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510(K) SUMMARY
A. Submitter Information
Manufacturer/Submitter: Neuralytix, LLC
138 S Park Square, STE 203
Fruita, CO 81521
Contact Person: Christopher Wybo
(248) 416-0740
wybo@nerve.health
B. Date Prepared
June 24, 2025
C. Device Name
Trade/Proprietary Name: Neuralytix iD3 System
Common/Usual Name: Surgical Nerve Stimulator/Locator
Device Classification: Class II per 21 CFR §874.1820
Product Code/Description: PDQ; Neurosurgical Nerve Locator
ETN; Stimulator, Nerve
D. Predicate Device Name
The subject Neuralytix iD3 System is substantially equivalent to the following primary predicate device:
- K173526 Sentio MMG Gen 2
E. Device Description
The Neuralytix iD3 System is a multichannel device for locating, mapping and assessing the status of motor nerves during surgical procedures. Neuralytix alerts the user of recorded mechanical activity (termed mechanomyography, or MMG) from muscles innervated by affected nerves, which may originate from operator applied electrical stimulus. The device will assist with nerve identification and assessment by alerting the surgeon when monitored nerves are activated. The device will also assist with tracking the status of monitored nerves throughout the course of surgical intervention. Neuralytix is especially useful in helping assess a patient’s neurophysiologic status by measuring and identifying nerve response thresholds, or the minimum amount of electrical current (mA) necessary to elicit an MMG response. Neuralytix enables intuitive controls for measuring, recording and comparing nerve response thresholds throughout a surgical procedure to provide insights to the user as to how the conduction and neural transmission ability of a nerve may change throughout surgery.
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F. Technological Characteristics
| Attribute | Subject Device Neuralytix iD3 System | Predicate Device Sentio MMG Gen 2 | Substantially Equivalent |
| --- | --- | --- | --- |
| Capital Equipment: Control Unit/Display | | | |
| Number of Channels | Max 8 | Max 10 | Yes |
| Display Size | 20cm x 13cm x 4cm | 32cm x 22cm x 3cm | Yes |
| Weight | 0.72 kg | 2.0 kg | Yes |
| Screen Size | 7.0 inch | 9.8 inch | Yes |
| System Stimulation | | | |
| Type Constant | Constant current (mA) | Constant current (mA) | Yes |
| Stimulus Range | 0-20 mA Standard Mode
0.3-4 mA Hi-Res Mode | 0-20 mA Nerve Mapping
0-2 mA Bipolar Mode | Yes |
| Control | Digitally controlled, adjusted in increments as follows per mode:
1mA Standard Mode
0.1mA Hi-Res Mode | Digitally controlled, adjusted in increments as follows per mode:
1mA Nerve Mapping
0.1mA Bipolar Mode | Yes |
| Maximum Stimulation Voltage | 160V | 115V | Yes |
| Waveform | Monophasic rectangular pulse | Monophasic rectangular pulse | Yes |
| Pulse Width | 100μs | 100μs | Yes |
| Stimulation Rate | 4Hz, 8Hz | 2Hz, 4Hz | Yes |
| Sensors | | | |
| Function | Mechanomyographic (MMG) | Mechanomyographic (MMG) | Yes |
| Type | Accelerometer | Accelerometer | Yes |
| Size | 2-inch round | 2-inch round | Yes |
| Ground Patch | | | |
| Attachment Mode | Hydrogel Adhesive | Hydrogel Adhesive | Yes |
| Size | 2 x 4 inch | 2 x 4 inch | Yes |
| Connector Type | 1.5 mm touchproof | 1.5 mm touchproof | Yes |
| Stimulation Instruments | | | |
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| Attribute | Subject Device Neuralytix iD3 System | Predicate Device Sentio MMG Gen 2 | Substantially Equivalent |
| --- | --- | --- | --- |
| Length | 200 mm | 200 mm | Yes |
| Stimulation Diameter | 2.0 mm | 2.2 mm | Yes |
| Stimulation Surface Area | 14.5 mm² | 14.7 mm² | Yes |
| Maximum charge density | 13.79 uC/cm² | 13.61 uC/cm² | Yes |
| Maximum RMS current density | 3.9 mA/cm² | 2.72 mA/cm² | Yes |
| Maximum power density | 22.07 W/cm² | 15.65 W/cm² | Yes |
| Electrical Insulation | Parylene C | Parylene C | Yes |
| Proximal Connector | 1.5mm touchproof | 1.5mm touchproof | Yes |
| Patient Contacting Material | 316L Stainless Steel; Parylene C | 316L Stainless Steel; Parylene C | Yes |
| Delivery | Sterile via Gamma Radiation; Single Use | Sterile via Ethylene Oxide Radiation; Single Use | Yes |
# G. Indications for Use/Intended Use
This device is intended for use in surgical procedures to assist in locating and mapping motor nerves through the use of mechanomyographic (MMG) signals and electrical stimulus of nerves. The device provides information directly to the surgeon to help assess a patient's neurophysiologic status by measuring and comparing MMG signals throughout a surgical procedure.
The device is intended to identify relative changes in the conduction and neural transmission ability of the nerve throughout a surgical procedure by measuring and comparing the minimum amount of electrical stimulation current (mA) required to induce a measurable MMG response (MMG nerve response threshold).
Examples of surgical applications which may require mechanomyographic (MMG) monitoring:
- Minimally invasive and open spinal surgery involving spinal fusion cages, screws, rods, plates, discs and biologics.
- Minimally invasive, open and endoscopic, direct and indirect nerve decompressions, discectomies, laminectomies, laminotomies, facetectomies, foraminotomies.
- Treatment of nerve compression, stenosis, degenerative disc disease, disc herniation, spondylolisthesis.
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# H. Summary of Similarities and Differences in Technological Characteristics, Performance and Intended Use
| Attribute | Substantial Equivalence Evaluation |
| --- | --- |
| Indications for Use | The indications for use statement of the subject device is substantially equivalent to the primary predicate device, with additional language provided for clarifying how the device is used intraoperatively and what MMG signals are measured and recorded for helping surgeons assess a patient's neurophysiological status. The clarifying language and differences in indications for use do not change the intended use as a surgical nerve stimulator / locator, nor raise new questions of safety or effectiveness, as demonstrated by results of the risk-based verification and validation testing. |
| Capital Equipment: Control Unit/Display | Sensor Channel Display - Live streaming graphs for each sensor channel is substantially equivalent to the predicate device. Stimulation Output Display - Real time display of active stimulation current (mA) is substantially equivalent to the predicate device. Alerts - Substantially equivalent - Subject device meets the same acceptance criteria and conforms to the same consensus standards as the primary predicate device for visually and audibly alerting the user of device activity. User Interface - Touchscreen graphical user interface control is substantially equivalent to the predicate device. Display Size - Substantially equivalent - Subject device meets the same acceptance criteria and conforms to the same consensus standards as the primary predicate device for displaying relevant and critical device information to the user on the touchscreen display. Weight - Substantially equivalent - Subject device meets the same acceptance criteria and conforms to the same consensus standards as the primary predicate device. |
| Event Detection Algorithm | Enhanced signal acquisition and MMG event detection is substantially equivalent to the predicate device, as evidenced by the comparative performance evaluation. |
| System Stimulation | Stimulation Output - Cathodic constant current (mA) stimulation output via rectangular waveform pulse is substantially equivalent to the predicate device. Stimulus Range - Standard (0-20 mA) and Hi-Res (0.3-4 mA) stimulation ranges are substantially equivalent to the predicate device and have the same intended function. Stimulation Pulse Width - Substantially equivalent to the predicate device. Stimulation Pulse Rate - User selectable and continuous; substantially equivalent to the predicate device. |
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| | Control - Digitally controlled, incremental adjustment for Standard (0-20 mA in 1 mA increments) and Hi-Res (0.3-4 mA in 0.1 mA increments) stimulation modes via touchscreen display is substantially equivalent to the predicate device.
Maximum Stimulation Voltage - Maximums are within the limit settings and substantially equivalent to the predicate device. |
| --- | --- |
| Stimulation Instruments | Substantially equivalent to predicate device in terms of conductive materials, dielectric properties, exposed stimulation surface areas and intended function. |
| Sensors | Signal (electromechanical) - same as predicate device.
Technology - Digital, same as predicate device.
Configuration - 4-channels per harness/connector, simplified usability while substantially equivalent performance requirements as predicate device.
Usability - Increased robustness for multi-use applications; substantially equivalent performance requirements as predicate device.
Size - substantially equivalent to predicate device.
Connector Type - Simplified for usability, substantially equivalent performance requirements as predicate device.
Operating Voltage - 1.8V; substantially equivalent to predicate device. |
| Sensor Patches | Single-use sensor patches configured for application with multi-use sensor harness. Substantially equivalent size, materials and intended function and performance requirements as predicate device for adhering sensors to patient. |
| Ground Patch | Substantially equivalent size, materials, biocompatibility and performance requirements as predicate device. |
| Materials | All components are comprised of materials evidenced to be suited for their intended purpose, with applicable biocompatible components and intended function substantially equivalent to the predicate device. |
# I. Materials / Contact Classification
The contact classification for the patient contacting components of the NTX-9003 Decompression Stim Probe is externally communicating with tissue/bone and cerebrospinal fluid contact for a limited duration $(<= 24$ hours). The patient contacting materials of the subject device are biocompatible 316L stainless steel with Parylene C conformal coating.
The contact classification for the patient contacting components of the Sensor Patch and Ground Patch (NTX-9004/NTX-9004) is skin contacting for a limited duration $(<= 24$ hours). The patient contacting material of the subject device is biocompatible hydrogel adhesive.
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J. Biocompatibility
A Biocompatibility Evaluation was performed on the Neuralytix iD3 System to support the Substantial Equivalence. A Summary of Biocompatibility Testing is provided below
NTX-9003, iD3 Decompression Stim Probe: Biocompatibility Testing performed on the subject device; NTX-0301, iD3 Decompression Stim Probe
| Test | Results | Conclusions |
| --- | --- | --- |
| Cytotoxicity – MEM Elution | No cytotoxicity or cell lysis was noted in any of the test wells. No pH shift was observed at 48 hours. The reagent control, negative control and the positive control performed as anticipated. | Non-Cytotixic |
| Sensitization – GPMT | All animals were observed with the expected dermal reactions associated with intradermal injection of FCA and were clinically normal throughout the study. No evidence of sensitization was observed. | Non-sensitizer |
| Intracutaneous Reactivity | All animals appeared normal throughout the study. All injection sites appeared normal immediately following injection. No difference was noted between the Test and Control means. | Non-Irritant |
| Acute Systemic Toxicity | There was no mortality or evidence of systemic toxicity from the extracts injected into mice. Each test article extract met the requirements of the study. | Non-Toxic |
| Material-Mediated Pyrogenicity, USP-Rabbit | No single animal showed a temperature rise of 0.5°C or more above its baseline temperature. The total rise of the rabbits' temperature during 3 hours was 0.0°C. | Non-Pyrogenic |
| Hemolysis – Extract | The test article extract had a hemolytic index of -0.1% | Non-Hemoyltic |
NTX-9004, iD3 Sensor/Ground Kit (4-ch) & NTX-9008, iD3 Sensor/Ground Kit (8-ch): Biocompatibility Testing was performed on the subject device; NTX-0400, Sensor Patch.
| Test | Results | Conclusions |
| --- | --- | --- |
| Cytotoxicity – Direct Contact method | The test article showed evidence of causing mild reactivity when exposed to L-929 cells directly. The test article met the requirements of the test and is considered to not elicit a cytotoxic effect. Risk Assessment has been performed which identified no indications of biological risk during intended clinical use. | Non-Cytotoxic |
| Sensitization – Buehler (closed patch) | The test article showed no evidence of causing delayed dermal contact sensitization in the guinea pig. | Non-sensitizer |
| Skin Irritation in Rabbits | There was no to well-defined erythema and no edema observed on the skin of the animals treated with the test article. The Primary Irritation Index for the test article was calculated to be 0.1. The response of the test article was categorized as negligible. | Non-Irritant |
K. Summary of Performance Testing
Non-clinical testing was conducted in accordance with Design Controls and Risk Management to confirm
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device performance for its intended use. The test results demonstrate that the device performs as well as the predicate device and/or conform to recognized consensus standards for the compared design inputs, including, but not limited to; operating conditions, electrical safety, electromagnetic compatibility, hardware and disposable device functionality, signal acquisition equivalence, biocompatibility, shelf-life, sterilization, packaging integrity and software validations. Additionally, a substantially equivalent comparative performance evaluation was performed using clinically relevant MMG signal simulation to capture a statistically significant sample for demonstration of high agreement with respect to performance of the predicate device.
| Test | Test Method Summary | Results/Conclusions |
| --- | --- | --- |
| Plug and Wire Disconnect Force Testing | Wire to plug connections (Probe-Probe Wire, Control Unit-Probe Wire, Control Unit-Ground Patch) must provide at least 2.2N of retention force (to withstand inadvertent disconnection) when pulled normal to plug). Instron Test at 300mm/min. | All samples passed the acceptance criteria. Design inputs satisfied. Substantially Equivalent. |
| Hydrogel Patch Adhesion Testing | Adhesive Sensor Patch and Ground Patches must provide at least 4N of retention force to HDPE (skin-approximating) test surface when pulled normal from surface by Sensor Wire or Ground Wire, respectively. Testing performed per PSTC 101 Type F. | All samples passed the acceptance criteria. Design inputs satisfied. Substantially Equivalent. |
| Sterility | Sterilization was validated per ISO 11137-1, ISO 11137-, and ISO 11137-32 using gamma irradiation at a sterility assurance level of 10-6. | All samples passed the acceptance criteria. Design inputs satisfied. Substantially Equivalent. |
| Sterile Package Integrity | Sterile Packaging was validated per ISO 11607-1 and ISO 11607-2, including Seal Strength Testing per ASTM F88/F88M-21, Bubble-Leak Testing per ASTM F2096-19 (Reapproved 2019) | All samples passed the acceptance criteria. Design inputs satisfied. Substantially Equivalent. |
| Real Time Aging – Sterile | Sterile Packaging was maintained for 3 years of Real Time Aging and then subjected to Seal Strength Testing per ASTM F88/F88M-21, Bubble-Leak Testing per ASTM F2096-19 (Reapproved 2019) | All samples passed the acceptance criteria. Design inputs satisfied. Substantially Equivalent. |
| Accelerated Aging – Non-Sterile | Adhesive Sensor Patch and Ground Patches must provide at least 4N of retention force to HDPE (skin-approximating) test surface when pulled normal from surface by Sensor Wire or Ground Wire, respectively. Patches were subjected to 1 year of Accelerated Aging per ASTM F1980-21 and pull testing per PSTC 101 Type F. | All samples passed the acceptance criteria. Design inputs satisfied. Substantially Equivalent. |
| Environmental and Transport Stability | All devices were subjected, in packaging, to environmental preconditioning at stated transportation conditions per ASTM D4332 and then subjected to Transport Stability Testing per ASTM D4169 Cycle 13. Functional Testing of Devices performed afterwards per internal protocol. Sterile Packages subjected to Seal Strength Testing per ASTM F88/F88M-21, | All samples passed the acceptance criteria. Design inputs satisfied. Substantially Equivalent. |
| | Bubble-Leak Testing per ASTM F2096-19 (Reapproved 2019) | |
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| | Bubble-Leak Testing per ASTM F2096-19 (Reapproved 2019) | |
| --- | --- | --- |
| EMC and Electrical Safety | System was tested for compliance to the requirements of IEC 60601-1, IEC 60601-1-2, IEC 60601-1-6, and IEC 60601-2-40. Additional Evaluation of EMC performance to IEC TR 60601-4-2 was completed | All samples passed the acceptance criteria. Design inputs satisfied. Substantially Equivalent. |
| Biocompatibility | Biocompatibility testing was conducted on the tissue contacting components of the system:
The Hydrogel Patches were evaluated per requirements for intact skin contacting (≤24hr) devices: ISO 10993-1, ISO 10993-5, ISO 10993-10, and ISO 10993-23 (cytotoxicity, sensitization, irritation).
The Stimulation Probe as evaluated per requirements for Externally communicating devices with tissue/bone and cerebrospinal fluid contact for limited duration (≤24hr). Testing was performed in accordance with 10993-1, ISO 10993-5, ISO 10993-10, ISO 10993-11, ISO 10993-23, and ISO 10993-4 (cytotoxicity, sensitization, intracutaneous irritation, acute systemic toxicity, material-mediated pyrogenicity, and indirect [extract] hemolysis). | All samples passed the acceptance criteria. Design inputs satisfied. Substantially Equivalent. |
| Sensor Characterization | The subject device measurements were compared to NIST traceable reference accelerometer at multiple frequencies to confirm performance was within specification with respect to low-pass filtering and % error. | All samples passed the acceptance criteria. Design Inputs satisfied. Substantially Equivalent. |
| Comparative Performance Evaluation | MMG-detection performance of subject device was compared to predicate device by subjecting both devices to MMG-positive and MMG-negative waveforms. Overall correlation was evaluated and confirmed to be >99% agreement. | All samples passed the acceptance criteria. Design Inputs satisfied. Substantially Equivalent. |
L. Conclusion
The indications for use and intended use of the subject device are consistent with those of the predicate device. Comparison of technological characteristics and results of performance testing demonstrate substantial equivalence with the predicate device.
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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.