K042529 · Fall Prevention Technologies, LLC · GWN · Oct 6, 2004 · Neurology
Device Facts
Record ID
K042529
Device Name
BALANCEBACK VNG SYSTEM
Applicant
Fall Prevention Technologies, LLC
Product Code
GWN · Neurology
Decision Date
Oct 6, 2004
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 882.1460
Device Class
Class 2
Attributes
3rd-Party Reviewed
Indications for Use
The BalanceBack VNG device is intended for recording, viewing, and analyzing eye movements in support of identifying balance disorders in human subjects. The VNG is intended for use only by trained physicians or clinicians in an appropriate doctor's office or health care facility. This device provides no diagnoses nor does it provide diagnostic recommendations.
Device Story
BalanceBack VNG system records/analyzes eye movements to assist in identifying balance disorders; used by physicians/clinicians in clinical settings. System includes goggles with IR light sources and IR cameras; projector for visual stimuli. IR cameras capture continuous grayscale video of eyes; video digitized/processed by computer software. Software tracks/records/analyzes eye movements during battery of tests: caloric, positional, Hallpike, gaze, saccades, smooth pursuit, optokinetic, high-frequency head shake. System calculates/reports parameters for each test; results combined with clinical info by physician to assess balance sensors/processing system. Benefits include objective documentation of eye movement patterns to aid clinical diagnosis.
Clinical Evidence
Bench testing only. Verification procedures with pass/fail criteria performed to ensure system specifications met. Device certified for conformance to ANSI Z-136.1 (2000), IEC 60601-1 (2004), IEC 60601-1-1 (2000), IEC 60601-1-2 (2001), and UL 60601-1 (2003). No clinical data provided.
Technological Characteristics
System includes goggles with IR light sources and IR cameras, digital computer, and projector. Sensing principle: IR video-oculography. Connectivity: workstation-based. Standards: ANSI Z-136.1, IEC 60601-1, IEC 60601-1-1, IEC 60601-1-2, UL 60601-1. Software performs signal processing, tracking, and analysis of eye movement parameters.
Indications for Use
Indicated for human subjects with suspected balance disorders. Intended for use by trained physicians or clinicians in clinical settings. No specific age or gender restrictions stated.
Regulatory Classification
Identification
A nystagmograph is a device used to measure, record, or visually display the involuntary movements (nystagmus) of the eyeball.
Predicate Devices
Eye Dynamics, Inc. House Infrared/Video Electronystagmographic (ENG) System (K925111)
Sensomotoric Instruments, Inc. 2d Vog - Video-Oculography System (K972243)
Submission Summary (Full Text)
{0}------------------------------------------------
OCT 6 - 2004
#### 510(k) Summary E
| Submitter's Name: | Fall Prevention Technologies, LLC | | |
|-------------------------------|-----------------------------------------------------------------------------------|---------------|--|
| Submitter's Address: | 2300 NW Corporate Blvd. Suite 141 | | |
| | Boca Raton, FL 33431 | | |
| Submitter's Telephone: | 561-995-8883 | | |
| Contact Name: | Keith Kravitz | | |
| Date Summary was<br>Prepared: | August 10, 2004 | | |
| Trade or Proprietary Name: | BalanceBack VNG System | | |
| Common or Usual Name: | VNG | | |
| Classification Name: | Nystagmograph (21 CFR 882.1460), product code GWN,<br>Class II | | |
| Predicate Devices: | Device Name | 510(k) Number | |
| | Eye Dynamics, Inc. House<br>Infrared/Video Electronystagmographic<br>(ENG) System | K925111 | |
| | Sensomotoric Instruments, Inc. 2d Vog<br>- Video-Oculography System | K972243 | |
### Indications for Use:
The BalanceBack VNG device is intended for recording, viewing, and analyzing eye movements in support of identifying balance disorders in human subjects. The VNG is intended for use only by trained physicians or clinicians in an appropriate doctor's office or health care facility. This device provides no diagnoses nor does it provide diagnostic recommendations.
#### Description of the Device and Summary of the Technological Characteristics:
Eve movements have long been known to provide important clues to the identification and location of balance disorders. Physicians and other clinicians employ the VNG system to conduct a set of established, well-known and well-documented eye movement tests. The results of the VNG eye movement tests are combined with other clinical information so that the attending clinicians may render findings on the health of the patient's primary balance sensors and related balance processing system.
Using the VNG, clinicians guide patients through a series of eye movement tests. A testing battery (i.e., an examination) typically consists of all eight tests supported by the VNG: caloric, positional, Hallpike, gaze, saccades, smooth pursuit, optokinetic, and
1/2
K042529
{1}------------------------------------------------
high-frequency head shake. The attending physician may select one, several, or all tests, and has full flexibility in determining the sequence of the tests to be performed.
K042529
The patient under examination wears the VNG goggles. The goggles contain one IR light source and one IR camera for each eye. The IR video cameras sense the infrared signal reflected from the eyes and create a continuous monochromatic (grayscale) video motion picture stream of the eyes. The infrared signal is used because the human eye cannot detect the presence of the infrared signal and therefore this illumination does not create perturbations in measurements of eye movement. Measurements may therefore be made both in the presence and in the absence of visible light, thus providing clinicians with maximum flexibility for making measurements in a wide variety of situations.
The video stream from the IR cameras is digitized and transferred into the memory of the digital computer where signal processing software tracks, records, analyzes and displays eye movements for the attending clinician. The VNG system makes appropriate calculations and presents reports of well-known and well-documented parameters associated with each eye movement test.
Some eye tests require the patient to follow a visual stimulus. A projector, controlled by the VNG software, displays stimuli on any light-colored surface, such as a wall or projection screen. The goggles and VNG software record the patient's eye movements while he/she follows the stimulus.
### Substantial Equivalence:
The BalanceBack VNG device is substantially equivalent to the Eye Dynamics, Inc. House Video/Video Electronystagmographic (ENG) System and the Sensomotoric Instruments, Inc. 2d Vog - Video-Oculography System. All three devices support the recording, viewing, and analyzing of horizontal and vertical eye movements to assist in the identification of balance disorders in human subjects. These devices use similar technology, including workstation, computer monitor, masks mounted with video cameras, and software, for performing caloric, positional, Hallpike, gaze, saccades, smooth pursuit, and optokinetic examinations. All three devices use the same sampling rate and similar illumination wavelengths.
### Testing:
Various tests of the hardware and software are being performed to verify system specifications. Verification procedures with pass/fail criteria were developed to ensure that the product met all the specified requirements. As part of this verification, a certified body shall conduct tests to determine the conformance of the device to the recognized standards shown below. The device will not be marketed or sold until it has been certified to pass these tests.
| • ANSI Z-136.1 (2000) | • IEC 60601-1-1 (2000) | • UL 60601-1 (2003) |
|-----------------------|------------------------|---------------------|
| IEC 60601-1 (2004) | • IEC 60601-1-2 (2001) | |
- · IEC 60601-1 (2004) · IEC 60601-1-2 (2001)
{2}------------------------------------------------
DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/2/Picture/1 description: The image shows the seal of the U.S. Department of Health & Human Services. The seal features a stylized eagle-like symbol with three curved lines representing wings or feathers. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" is arranged in a circular pattern around the symbol.
Public Health Service
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
OCT 6 - 2004
Fall Prevention Technologies, LLC c/o Mr. Daniel W. Lehtonen Staff Engineer - Medical Devices Intertek Testing Services NA, Inc. 70 Codman Hill Road Boxborough, Massachusetts 01719
Re: K042529
Trade/Device Name: BalanceBack VNG System Regulation Number: 21 CFR 882.1460 Regulation Name: Nystagmograph Regulatory Class: II Product Code: GWN Dated: September 16, 2004 Received: September 17, 2004
Dear Mr. Lehtonen:
We have reviewed your Section 510(k) premarket notification of intent to market the device we nave reviewed your be devermined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate for use stated in the encreatives of 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 r ou may a controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such additional controls. Existing major regulations affecting your device can may or bain 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 r reade o a reade 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); 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.
{3}------------------------------------------------
Page 2 - Mr. Daniel W. Lehtonen
This letter will allow you to begin marketing your device as described in your Section 510(k) This letter will anow you to ocgin maneting of substantial equivalence of your device to a legally premarket notification. The PDF Intellig of castion for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please 11 you desire spocific acrive 2017 904 276-0115. Also, please note the regulation entitled, Coliner the Office of Comparket notification" (21CFR Part 807.97). You may obtain other general information on your responsibilities under the Act from the Division of Small other general informational and Consumer Assistance at its toll-free number (800) 638-2041 or Manufacturers, Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html
Sincerely yours,
Miriam C. Provost
Celia M. Witten, Ph.D., M.D. Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{4}------------------------------------------------
# D Indications for Use Statement
Ver/ 3 - 4/24/96
Applicant: Fall Prevention Technologies, LLC
510(k) Number (if known): _____
Device Name: BalanceBack VNG System
Indications For Use:
The BalanceBack VNG device is intended for recording, viewing, and analyzing eye movements in support of identifying balance disorders in human subjects. The VNG is intended for use only n support of residentlying on an appropriate doctor's office or health care facility. This device provides no diagnoses nor does it provide diagnostic recommendations.
## (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
er the Counter Use
Miriam C. Provost
(Division Division of General, Restorative, and Neurological Devices
510(k) Number_
Prescription Use
per 21 CFR 801.109
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.