K162407 · Bioness, Inc. · GZI · Jan 27, 2017 · Neurology
Device Facts
Record ID
K162407
Device Name
L300 Go System
Applicant
Bioness, Inc.
Product Code
GZI · Neurology
Decision Date
Jan 27, 2017
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 882.5810
Device Class
Class 2
Attributes
Therapeutic, Pediatric
Indications for Use
The L300 Go System is intended to provide ankle dorsiflexion in adult and pediatric individuals with foot drop and/or assist knee flexion or extension in adult individuals with muscle weakness related to upper motor neuron disease/injury (e.g., stroke, damage to pathways to the spinal cord). The L300 Go System electrically stimulates muscles in the affected leg to provide ankle dorsiflexion of the flexion or extension: thus, it also may improve the individual's gait. The L300 Go System may also: Facilitate muscle re-education Prevent/retard disuse atrophy Maintain or increase joint range of motion Increase local blood flow
Device Story
L300 Go System is an external functional neuromuscular stimulator for gait improvement and muscle rehabilitation. System components: functional stimulation cuffs (lower leg/thigh) with surface electrodes; external pulse generators (EPG); control unit; optional gait sensor; clinician programming software. Input: motion sensor data (lower leg EPG) or gait sensor data (heel events) to trigger stimulation. Operation: EPG delivers biphasic electrical stimulation to muscles to facilitate dorsiflexion or knee flexion/extension. Used in clinics (clinician configuration) and by patients (daily use). Clinician uses tablet/PC software to program stimulation parameters. Patient uses control unit or stimulator-based interface to manage settings and monitor status. Benefits: improved gait, muscle re-education, prevention of disuse atrophy, maintenance of joint range of motion, increased local blood flow.
Clinical Evidence
No clinical data provided; substantial equivalence is based on technological characteristics and bench testing.
Technological Characteristics
External functional neuromuscular stimulator. Materials: Bay State Polymer PA-2000RX (remote/EPG), biocompatible fabric over POM Hi plastic skeleton (lower leg cuff), TPU (thigh cuff), ABS (foot sensor). Energy: Battery-operated. Connectivity: Bluetooth Low Energy. Stimulation: Biphasic symmetric/asymmetric waveforms, current-regulated, 1-2 channels. Standards: IEC 60601-1, IEC 60601-1-2, IEC 60601-2-10, FCC Part 15.
Indications for Use
Indicated for adult and pediatric individuals with foot drop (ankle dorsiflexion) and/or adult individuals with muscle weakness related to upper motor neuron disease/injury (knee flexion/extension).
Regulatory Classification
Identification
An external functional neuromuscular stimulator is an electrical stimulator that uses external electrodes for stimulating muscles in the leg and ankle of partially paralyzed patients (e.g., after stroke) to provide flexion of the foot and thus improve the patient's gait.
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
January 27, 2017
Bioness Inc. % Evan L. Rosenfeld, M.D., J.D. Regulatory Consultant MDJD Consulting 5905 Warm Mist Ln. Dallas. Texas 75248
Re: K162407
Trade/Device Name: L300 Go System Regulation Number: 21 CFR 882.5810 Regulation Name: External Functional Neuromuscular Stimulator Regulatory Class: Class II Product Code: GZI, IPF Dated: December 16, 2016 Received: December 21, 2016
Dear Evan L. Rosenfeld, M.D., J.D.:
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 (reporting of medical device
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Page 2 - Evan L. Rosenfeld, M.D., J.D.
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,
Carlos L. Pena -S
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) K162407
Device Name L300 Go System
#### Indications for Use (Describe)
The L300 Go System is intended to provide ankle dorsiflexion in adult and pediatric individuals with foot drop and/or assist knee flexion or extension in adult individuals with muscle weakness related to upper motor neuron disease/injury (e.g., stroke, damage to pathways to the spinal cord). The L300 Go System electrically stimulates muscles in the affected leg to provide ankle dorsiflexion of the flexion or extension: thus, it also may improve the individual's gait.
The L300 Go System may also:
- Facilitate muscle re-education
- · Prevent/retard disuse atrophy
- · Maintain or increase joint range of motion
- · Increase local blood flow
| Type of Use (Select one or both, as applicable) |
|-------------------------------------------------|
|-------------------------------------------------|
Exportation (to Part 370.2(a) Subject to the EAR)
On-Site Consumption (to 370.2(a) Subject to the EAR)
|× | Prescription Use (Part 21 CFR 801 Subpart D)
| | Over-The-Counter Use (21 CFR 801 Subpart C)
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## 510(k) Summary Bioness Inc. L300 Go System
510(k) Summary: L300 Go System
Company name: Bioness Inc.
#### Contact person:
Mercedes Bayani Global Director, Regulatory Affairs Bioness Inc. Office Number: (661) 902-5324 Fax Number: (661) 362-4852 Email: mercedes.bayani@bioness.com 25103 Rye Canyon Loop Valencia, CA 91355, U.S.A.
#### Application Correspondent:
Evan L. Rosenfeld, M.D., J.D. Regulatory Consultant for Bioness Inc. MDJD Consulting Office Number: (972) 239-7021 Fax Number: (972) 239-7021 Email: evanrosenfeld2@sbcglobal.net
#### Date prepared: January 27, 2017
Trade Name: L300 Go System
Classification name: External functional neuromuscular stimulator
Class: Il
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#### Panel Identification: Neurology
Product code: GZI and IPF
#### Regulation number:
21 CFR § 882.5810 External functional neuromuscular stimulators
21 CFR § 890.5850 Powered muscle stimulators
#### Predicate devices:
- 1. Company: Bioness Neuromodulation Ltd. Device: NESS L300 Plus System (K103343)
- 2. Company: Bioness Neuromodulation Ltd. Device: NESS L300 System (K122784)
- 3. Company: Innovative Neurotronics, Inc. Device: WalkAide System (K140886)
### Purpose of the traditional 510(k) notice:
The L300 Go System is a new device that is substantially equivalent to its own prior generation devices, the NESS L300 Plus System, the NESS L300 System and the Innovative Neurotronics, Inc. WalkAide System.
### Device description:
The L300 Go System is intended to provide ankle dorsiflexion in adult and pediatric individuals with foot drop and/or assist knee flexion or extension in adult individuals with muscle weakness related to upper motor neuron disease/injury (e.g., stroke, spinal cord injury) or other disability. The L300 Go System electrically stimulates muscles in the affected leg to provide ankle dorsiflexion of the foot and/or knee flexion or extension; thus, it also may improve the individual's qait.
The L300 Go System consists of:
- 1. One or two Functional Stimulation Cuffs (L300 Lower Leg and Thigh), that include surface electrodes.
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- 2. External Pulse Generator (EPG) for the lower leg and EPG for thigh. Both EPG's deliver stimulation to their respective cuffs, and have user interface, including visual, audio, and tactile feedback. Lower EPG can use motion sensor based algorithm to detect heel events.
- 3. A Control Unit that allows simple wireless remote control of the EPG's while displaying real-time information regarding the system's status.
- 4. An optional Gait Sensor, which uses a dynamic gait tracking algorithm to detect heel events and wirelessly synchronizes stimulation.
- 5. A Clinician's Programming System with software, which is used for system programming by a trained clinician during configuration of the system for optimal fitting to the patient.
- 6. A power supply with two USB outputs and a proprietary cable to charge the EPG.
#### Indications for use:
The L300 Go System is intended to provide ankle dorsiflexion in adult and pediatric individuals with foot drop and/or assist knee flexion or extension in adult individuals with muscle weakness related to upper motor neuron disease/injury (e.g., stroke, damage to pathways to the spinal cord). The L300 Go System electrically stimulates muscles in the affected leg to provide ankle dorsiflexion of the foot and/or knee flexion or extension; thus, it also may improve the individual's gait.
The L300 Go System may also:
- Facilitate muscle re-education ●
- Prevent/retard disuse atrophy .
- Maintain or increase joint range of motion
- Increase local blood flow
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### Substantial Equivalence:
### Table 1.0 Basic Unit Characteristics
| | Current<br>submission<br>L300 Go System | Predicate<br>L300 Plus System | Predicate<br>L300 System | Predicate<br>WalkAide<br>System |
|--------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1. 510(k)<br>Number and<br>Indication for<br>Use | K162407<br>The L300 Go<br>System is intended<br>to provide ankle<br>dorsiflexion in adult<br>and pediatric<br>individuals with foot<br>drop and/or to<br>assist knee flexion<br>or extension in<br>individuals with<br>muscle weakness<br>related to upper<br>neuron<br>disease/injury (e.g.,<br>stroke, damage to<br>pathways to the<br>spinal cord). The<br>L300 Go System<br>electrically<br>stimulates muscles<br>in the affected leg to<br>provide ankle<br>dorsiflexion of the<br>foot and/or knee<br>flexion or extension;<br>thus, it may also<br>improve individual's<br>gait. | K103343<br>The Ness L300 Plus<br>System is intended<br>to provide ankle<br>dorsiflexion and<br>knee flexion or<br>extension in<br>individuals with foot<br>drop and thigh<br>muscle weakness,<br>following an upper<br>motor neuron injury<br>or disease. During<br>gait, the L300 Plus<br>System electrically<br>stimulates muscles<br>in the affected leg to<br>provide dorsiflexion<br>of the foot and<br>flexion or extension,<br>thus it may improve<br>the individual's gait. | K122784<br>The Ness L300<br>Foot Drop System<br>is intended to<br>provide ankle<br>dorsiflexion in<br>individuals ( adult<br>and pediatrics)<br>who have foot drop<br>following an upper<br>motor neuron injury<br>or disease. During<br>the swing phase of<br>gait, the Ness<br>L300 electrically<br>stimulates muscles<br>in the affected leg<br>to provide<br>dorsiflexion of the<br>foot . | K140886<br>The Innovative<br>Neurotronics<br>WalkAide<br>System is<br>intended to<br>address the lack<br>of ankle<br>dorsiflexion in<br>patients who<br>have sustained<br>damage to upper<br>motor neurons or<br>pathways to the<br>spinal cord.<br>During the swing<br>phase of<br>walking, the<br>WalkAide<br>electrically<br>stimulates the<br>appropriate<br>muscles that<br>cause ankle<br>dorsiflexion and<br>may thus<br>improve the gait<br>in patients with<br>chronic stroke.<br>walking ability. |
| | The L300 Go<br>System may also:<br>facilitate muscle reeducation, prevent/retard disuse atrophy, maintain or increase joint range of motion increase local blood flow | The L300 Plus<br>System may also:<br>facilitate muscle reeducation prevent/retard disuse atrophy, maintain or increase joint range of motion increase local blood flow. | The Ness 300 may<br>improve :<br>gait, facilitate muscle reeducation, prevent/retard disuse atrophy, maintain or increase joint range of motion increase local blood flow. | Medical benefits<br>of Functional<br>Electrical<br>Stimulation<br>(FES) may<br>include:<br>prevent /retardation of disuse atrophy increased local blood flow, muscle reeducation, and maintained or increased joint range of motion |
| 2. Device<br>Name, Model | L300 Go | L300 Plus | L300 | WalkAide |
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| 3.<br>Manufacturer | Bioness Inc.<br>25103 Rye Canyon<br>Loop, Valencia, CA<br>91355 | Bioness<br>Neuromodulation, a<br>Bioness Inc.<br>company<br>8 Hanagar Street,<br>Hod Hasharon,<br>4501309 Israel | Bioness<br>Neuromodulation, a<br>Bioness Inc.<br>company<br>8 Hanagar Street,<br>Hod Hasharon,<br>4501309 Israel | Innovative<br>Neurotronics<br>4999 Aircenter<br>Cir #103, Reno,<br>NV 89502 | |
|-----------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------|-----------------|
| 4. Power<br>Source(s) | Battery operated | Battery operated | Battery operated | Battery operated | |
| - Method of<br>Line Current<br>Isolation | N/A<br>(Battery operated) | N/A<br>(Battery operated) | N/A<br>(Battery operated) | N/A<br>(Battery<br>operated) | |
| - Patient<br>Leakage<br>current | As required by IEC<br>60601-1 | As required by IEC<br>60601-1 | As required by IEC<br>60601-1 | Information is not<br>available | |
| o Normal<br>condition | Less than 1.0 µA | Less than 1.3 µA | Less than 1.3 µA | Information is not<br>available | |
| o Single<br>fault<br>condition | 3.0 µA | 9.5 µA | 9.5 µA | Information is not<br>available | |
| 5. Number of<br>output modes | Two modes:<br>Biphasic Symmetric<br>and Biphasic<br>Asymmetric. | Two modes:<br>Biphasic Symmetric<br>and Biphasic<br>Asymmetric. | Two modes:<br>Biphasic Symmetric<br>and Biphasic<br>Asymmetric. | One Mode:<br>Biphasic<br>Asymmetric. | |
| | Applicable to both<br>lower leg and thigh<br>position of the<br>device. | Applicable to both<br>lower leg (L300<br>RFS) and thigh<br>(Thigh RFS)<br>position of the<br>device. | Applicable to lower<br>leg only. | Applicable to<br>lower leg only. | |
| 6. Number of<br>output<br>channels | Lower leg small cuff<br>– 1 channel | Lower leg small cuff<br>– 1 channel (L300<br>RFS) | Lower leg small cuff<br>– 1 channel (L300<br>RFS) | Lower leg cuff –<br>1 channel | |
| | Lower leg regular<br>cuff – 1 or 2<br>channels (in 2<br>channel<br>configuration, both<br>channels function<br>as a single channel<br>with separately<br>adjustable medial / | Lower leg regular<br>cuff – 1 channel | Lower leg regular<br>cuff – 1 channel | Lower leg<br>regular cuff – 1<br>channel | |
| | lateral stimulation<br>intensity)<br>Thigh cuff – 1<br>channel | Thigh cuff – 1<br>channel (Thigh<br>RFS) | N/A | N/A | |
| - Synchronous<br>or<br>Alternating? | Alternating (at one<br>time only one<br>channel is<br>activated) | N/A | N/A | N/A | |
| - Method of<br>Channel<br>Isolation | Isolation between<br>lower leg and thigh<br>cuff stimulators:<br>Thigh and Lower<br>cuffs are stimulated<br>by different battery<br>operated EPG's<br>without galvanic<br>connection between<br>them. | Isolation between<br>lower leg and thigh<br>cuff stimulators:<br>Thigh and Lower<br>cuffs are stimulated<br>by different battery<br>operated RFS units<br>without galvanic<br>connection between<br>them. | N/A | N/A | |
| | Isolation between<br>channels within the<br>same stimulator:<br>channels in the<br>same EPG are<br>switched using high<br>voltage FET<br>switches. | N/A | N/A | N/A | |
| 7. Regulated<br>current or<br>regulated<br>voltage? | Current | Current | Current | Voltage | |
| 8. Software /<br>Firmware /<br>Microprocessor<br>Control? | Yes | Yes | Yes | Yes | |
| 9. Automatic<br>Overload Trip? | Yes | Yes | Yes | No | |
| 10. Automatic<br>No-Load Trip | Yes | Yes | Yes | No | |
| 11. Automatic<br>Shut off? | Yes | Yes | Yes | No | |
| 12. Patient<br>Override<br>Control? | Yes | Yes | Yes | Yes | |
| 13. Indication<br>Display | Yes | Yes | Yes | Yes | |
| -<br>On/Off<br>Status | Yes | Yes | Yes | Yes | |
| -<br>Low<br>battery | Yes | Yes | Yes | Yes | |
| -<br>Voltage /<br>Current<br>Level? | Yes | Yes | Yes | Yes | |
| 14. Timer<br>range<br>(minutes) | Gait mode: 1-10<br>seconds<br>Max stimulation<br>duration (clinician<br>selectable)<br>Training mode: 5-60<br>minutes | Gait mode: 2-10<br>seconds<br>Max stimulation<br>duration (clinician<br>selectable)<br>Training mode: 5-60<br>minutes | Gait mode: 2-10<br>seconds<br>Max stimulation<br>duration (clinician<br>selectable)<br>Training mode: 5-<br>60 minutes | Gait mode: 0.2-3<br>seconds<br>Max stimulation<br>duration<br>(clinician<br>selectable)<br>Exercise mode:<br>1-30 minutes | |
| 15.<br>Compliance<br>with Voluntary<br>Standards | IEC 60601-1, IEC<br>60601-1-2, IEC<br>60601-2-10, FCC<br>part 15 subpart C<br>and B1 | IEC 60601-1, IEC<br>60601-1-1, IEC<br>60601-1-2, IEC<br>60601-2-10, FCC<br>part 15 subpart C<br>and B1 | IEC 60601-1, IEC<br>60601-1-1, IEC<br>60601-1-2, IEC<br>60601-2-10, FCC<br>part 15 subpart C<br>and B1 | IEC 60601-1,<br>IEC 60601-1-2,<br>IEC 60601-2-10 | |
| 16.<br>Compliance<br>with 21 CFR<br>898? | Yes | Yes | Yes | Yes | |
| 17. Weight | Control Unit: 60 g<br>EPG: 60 g | Control Unit: 45 g<br>L300 RFS: 50 g<br>Thigh RFS: 50 g | Control Unit: 45 g<br>L300 RFS: 50 g | Control Module:<br>88 g | |
| | Lower leg<br>FSC:150 | L300 FSC: 150 g | L300 FSC: 150 g | N/A | |
| | g | Thigh FSC: 330 g | Gait Sensor: 30 g | Gait Sensor: 30 g | Control Module: |
| | Thigh cuff: 300 g | | | | |
| | Foot Sensor: 25 g | | | | |
| 18. Dimensions<br>[W x H x D] | Control Unit:<br>75x40x17 mm | Control Unit:<br>73x46x18 mm | Control Unit:<br>73x46x18 mm | Control Module:<br>82x61x21 mm | |
| | EPG: 82x47x15 mm | L300 RFS:<br>74x43x15 mm<br>Thigh RFS:<br>74x43x15 mm | L300 RFS:<br>74x43x15 mm | | |
| | Lower leg FSC:<br>160x100x125 mm<br>Thigh FSC:<br>Length: 200 mm<br>Circumference<br>(min):<br>Proximal panel:<br>270 mm<br>Distal panel<br>(regular): 310 mm<br>Foot Sensor<br>(dimensions of the<br>Transmitter):<br>65x50x10: mm | L300 FSC:<br>160x100x125 mm<br>Thigh FSC:<br>Length: 170-260<br>mm<br>Circumference<br>(min):<br>Proximal panel:<br>240 mm<br>Distal panel<br>(regular): 300 mm<br>Gait Sensor<br>(dimensions of the | L300 FSC:<br>160x100x125 mm<br>Gait Sensor<br>(dimensions of the<br>Transmitter):<br>80x50x10 mm | | |
| | | Transmitter):<br>80x50x10 mm | | | |
| 19. Housing<br>Materials and<br>Construction | Remote Control:<br>Bay State Polymer<br>PA-2000RX | Control Unit:<br>PC-ABS | Control Unit:<br>PC-ABS | Control Module:<br>ABS | |
| | EPG: Bay State<br>Polymer PA-<br>2000RX<br>(Polycarbonate +<br>ABS) | L300 RFS:<br>polyamide 12<br>with 30% glass<br>fibers<br>reinforcement +<br>Transparent<br>ABS<br>Thigh RFS: PC-<br>ABS | L300 RFS:<br>polyamide 12<br>with 30% glass<br>fibers<br>reinforcement +<br>Transparent<br>ABS | | |
| | Lower Leg FSC:<br>Biocompatible fabric<br>over plastic (POM<br>Hi) skeleton<br>Thigh FSC: TPU | L300 FSC:<br>Biocompatible<br>fabric over<br>plastic (POM Hi)<br>skeleton. | L300 FSC:<br>Biocompatible<br>fabric over<br>plastic (POM Hi)<br>skeleton. | | |
| | Foot Sensor: ABS<br>(Sensor housing),<br>Bay state Polymer<br>PA-2000RX<br>(Electronics<br>housing) | Thigh FSC: TPU<br>Foot Sensor: ABS | Foot Sensor: ABS | | |
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Image /page/8/Picture/0 description: The image contains the logo for Bioness. The logo consists of an orange starburst-like symbol on the left, followed by the word "Bioness" in gray, block letters. Below "Bioness" is the phrase "LiveOn" in a smaller, lighter font. The logo is clean and modern, with a focus on the company name and tagline.
# Section 5 Section 5
510(k) Summary
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# Section 5 Section 5
510(k) Summary
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Image /page/10/Picture/0 description: The image shows the logo for Bioness. The logo consists of an orange sun-like symbol on the left, followed by the word "Bioness" in gray. Below "Bioness" is the text "LiveOn" in a smaller font size, also in gray. The logo is simple and modern, with a focus on the company name.
#### Table 2a. Output Specifications (Mode 1 – biphasic symmetrical output)
| MODE 1 –<br>BIPHASIC<br>SYMMETRICAL | Current<br>submission<br>L300 Go System | Predicate<br>L300 Plus System | Predicate<br>L300 System | Predicate<br>WalkAide<br>System |
|------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------|
| 1. Waveform | Biphasic<br>Symmetrical | Biphasic<br>Symmetrical | Biphasic<br>Symmetrical | Biphasic<br>Asymmetrical<br>only |
| 2. Shape | Rectangular | Rectangular | Rectangular | N/A |
| 3. Maximum<br>Output Voltage<br>(+/- 10%) | Lower leg: 50V @<br>500 Ω<br>Thigh:<br>50V @<br>500 Ω | Lower leg: 40V @<br>500 Ω<br>Thigh:<br>50V @<br>500 Ω | Lower leg: 40V<br>@ 500 Ω<br>Thigh: N/A | N/A |
| | Lower leg: 130V @<br>2 kΩ<br>Thigh:<br>130V @<br>2 kΩ | Lower leg: 120V @<br>2 kΩ<br>Thigh:<br>120V @<br>2 kΩ | Lower leg:<br>120V @ 2 kΩ<br>Thigh: N/A | N/A |
| | Lower leg: 130V @<br>10 kΩ<br>Thigh:<br>130V @<br>10 kΩ | Lower leg: 120V @<br>10 kΩ<br>Thigh:<br>120V @<br>10 kΩ | Lower leg:<br>120V @ 10 kΩ<br>Thigh: N/A | N/A |
| 4. Maximum<br>Output Current<br>(+/- 10%) | Lower leg: 100mA<br>@ 500 Ω<br>Thigh:<br>100mA<br>@ 500 Ω | Lower leg: 80mA<br>@ 500 Ω<br>Thigh:<br>100mA<br>@ 500 Ω | Lower leg:<br>80mA @ 500Ω<br>Thigh: N/A | N/A |
| | Lower leg: 65mA<br>@ 2 kΩ<br>Thigh:<br>65mA<br>@ 2 kΩ | Lower leg: 60mA<br>@ 2 kΩ<br>Thigh:<br>60mA<br>@ 2 kΩ | Lower leg:<br>60mA @ 2 kΩ<br>Thigh: N/A | N/A |
| | Lower leg: 13mA<br>@ 10 kΩ<br>Thigh:<br>13mA<br>@ 10 kΩ | Lower leg: 12mA<br>@ 10 kΩ<br>Thigh:<br>12mA<br>@ 10 kΩ | Lower leg:<br>12mA @ 10<br>kΩ<br>Thigh: N/A | N/A |
| 5. Pulse width | 100, 150, 200, 250,<br>300 µs (each:<br>positive and phase) | 100, 200, 300 µs<br>(each: positive and<br>phase) | 100, 200, 300<br>µs (each:<br>positive and<br>phase) | N/A |
| | Interphase period<br>µs: 50, 100, 200<br><br>Total pulse<br>duration:<br>250, 350, 450, 550,<br>650 µs<br>(for interphase | Interphase period<br>µs: 50<br><br>Total pulse<br>duration:<br>250, 450, 650 µs | Interphase<br>period µs: 50<br><br>Total pulse<br>duration:<br>250, 450, 650 µs | |
| 6. Frequency | interval of 50 µs)<br>10, 15, 20, 25, 30,<br>35, 40, 45 Hz | 20, 25, 30, 35, 40,<br>45 Hz | 20, 25, 30, 35,<br>40, 45 Hz | N/A |
| 7. For<br>interferential<br>modes only: Beat<br>Frequency. | N/A | N/A | N/A | N/A |
| 8. For multiphasic<br>waveforms only: | Yes | Yes | Yes | N/A |
| -<br>Symmetrical<br>phases? | Yes | Yes | Yes | N/A |
| - Phase Duration | Positive phase:<br>100, 150, 200, 250,<br>300 µs<br>Negative phase:<br>100, 150, 200, 250,<br>300 µs | Positive phase:<br>100, 200, 300 µs<br>Negative phase:<br>100, 200, 300 µs | Positive<br>phase:<br>100, 200, 300<br>µs<br>Negative<br>phase:<br>100, 200, 300<br>µs | N/A |
| 9. Net Charge<br>(µC per pulse) @<br>500 Ω | 0 µC, using<br>inverted balanced<br>phases | 0 µC, using<br>inverted balanced<br>phases | 0 µC, using<br>inverted<br>balanced<br>phases | N/A |
| 10. Maximum<br>Phase Charge<br>(µC) @ 500 Ω | Lower leg:<br>$300 \text{ µs } * 100 \text{ mA } =$<br>30 µC<br>Thigh:<br>$300 \text{ µs } * 100 \text{ mA } =$<br>30 µC | Lower leg:<br>$300 \text{ µs } * 80 \text{ mA } =$<br>24 µC<br>Thigh:<br>$300 \text{ µs } * 100 \text{ mA } =$<br>30 µC | Lower leg:<br>$300 \text{ µs } * 80$<br>$\text{mA } = 24 \text{ µC}$<br>Thigh: N/A | N/A |
| 11. Maximum<br>Current Density<br>@ 500 Ω | Maximum current<br>levels are:<br>Lower leg: 16.43<br>mA (rms)<br>Thigh:<br>16.43<br>mA (rms)<br>Maximum current<br>density is:<br>Lower leg (small<br>cuff):<br>1.63 mA/cm² (rms),<br>for smallest<br>electrodes area of<br>10.1 cm²<br>Lower leg (regular<br>cuff):<br>1.04 mA/cm² (rms),<br>for smallest<br>electrodes area of<br>15.8 cm²<br>Thigh: 0.23<br>mA/cm² (rms), for<br>smallest electrodes<br>area of 72 cm² | Maximum current<br>levels are:<br>Lower leg: 13.15<br>mA (rms)<br>Thigh:<br>16.43<br>mA (rms)<br>Maximum current<br>density is:<br>Lower leg (small<br>cuff):<br>1.30 mA/cm² (rms),<br>for smallest<br>electrodes area of<br>10.1 cm²<br>Lower leg (regular<br>cuff):<br>0.83 mA/cm² (rms),<br>for smallest<br>electrodes area of<br>15.8 cm²<br>Thigh: 0.23<br>mA/cm² (rms), for<br>smallest electrodes<br>area of 72 cm² | Maximum<br>current levels<br>are:<br>Lower leg:<br>13.15 mA<br>(rms)<br>Thigh: N/A<br>Maximum<br>current density<br>is:<br>Lower leg<br>(small cuff):<br>1.30 mA/cm²<br>(rms), for<br>smallest<br>electrodes<br>area of 10.1<br>cm²<br>Lower leg<br>(regular cuff):<br>0.83 mA/cm²<br>(rms), for<br>smallest<br>electrodes<br>area of 15.8<br>cm²<br>Thigh: N/A | N/A |
| 12. Maximum<br>Power Density @<br>500 Ω | Lower leg (small<br>cuff):<br>13.4 mW/cm², for<br>smallest electrodes<br>area of 10.1 cm²<br>Lower leg (regular<br>cuff):…
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Learn the FDA Browser
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.