K123354 · Actegy , Ltd. · IPF · Jun 28, 2013 · Physical Medicine
Device Facts
Record ID
K123354
Device Name
REVITIVE IX
Applicant
Actegy , Ltd.
Product Code
IPF · Physical Medicine
Decision Date
Jun 28, 2013
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 890.5850
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The Revitive IX is indicated for: - Relaxation of muscle spasms; . - Prevention or retardation of disuse atrophy; ● - Increasing local blood circulation; . - Muscle re-education; . - Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis; and . - Maintaining or increasing range of motion. .
Device Story
Revitive IX is a powered muscle stimulator (NMES) used to deliver electrical stimulation to muscles via foot pads or electrode pads. It features an optional 'IsoRocker' for ankle movement during stimulation. The device is operated by the user via a remote control and interface. It transforms electrical input into biphasic pulses (20-80Hz) to induce muscle contractions. Used in home or clinical settings, it helps patients by increasing local blood circulation, preventing disuse atrophy, and aiding muscle re-education. The healthcare provider or user monitors stimulation levels (0-150V) via the display. The device includes an automatic shut-off and patient override control for safety.
Clinical Evidence
Bench testing only. Biocompatibility, electromagnetic compatibility, and safety testing were conducted. Results confirmed the device functioned as intended and met expected performance standards.
Technological Characteristics
Powered muscle stimulator (21 CFR 890.5850). Materials: ABS casing, NBR footpads. Energy: 100-240V AC power adaptor. Output: Biphasic pulses, 20-80Hz, regulated voltage up to 150V. Two output channels (sole and body pads). Features: IsoRocker for ankle movement, remote control, user interface. Connectivity: Standalone. Standards: EN60601-1-2:2007, 21 CFR 898.
Indications for Use
Indicated for patients requiring muscle spasm relaxation, prevention of disuse atrophy, increased local blood circulation, muscle re-education, post-surgical calf muscle stimulation to prevent venous thrombosis, or maintenance/increase of range of motion.
Regulatory Classification
Identification
A powered muscle stimulator is an electrically powered device intended for medical purposes that repeatedly contracts muscles by passing electrical currents through electrodes contacting the affected body area.
Predicate Devices
IF 3Wave Interferential Stimulator System, Model 711 OS (K050046)
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K 123354
# 510(k) SUMMARY Actegy's Revitive IX
# JUN 2 8 2013
Submitter's Name, Address, Telephone Number, Contact Person and Date Prepared
Actegy Ltd. 8 Queen Square, Ascot Business Park Lyndhurst Road Ascot Berkshire SL5 9FE വന
| Phone: | +44(0) 1344 636 940 |
|-----------------|---------------------|
| Facsimile: | +44(0) 8452 255 612 |
| Contact Person: | Josh Penny |
| Date Prepared: | June 27, 2013 |
# Name of Device and Name/Address of Sponsor
Revitive IX
Actegy Ltd. 8 Queen Square, Ascot Business Park Lyndhurst Road Ascot Berkshire SL5 9FE UK
#### Common or Usual Name
Muscle Stimulator, Neuromuscular electrical stimulation (NMES) device
#### Classification Name
Powered muscle stimulator, 21 C.F.R. § 890.5850, Product code IPF
#### Predicate Devices
IF 3Wave Interferential Stimulator System, Model 711 OS, Compex Technologies, Inc. (K050046) Lifecare Garment Electrodes, Everyway Medical Instruments Co. Ltd. (K103719)
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#### Intended Use / Indications for Use
The Revitive IX is indicated for:
- Relaxation of muscle spasms; .
- Prevention or retardation of disuse atrophy; ●
- Increasing local blood circulation; .
- Muscle re-education; .
- Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis; and .
- Maintaining or increasing range of motion. .
# Technological Characteristics
The Revitive IX consists of foot pads and/or electrode pads that deliver electrical stimulation to the muscles; an optional feature that allows for ankle movement during stimulation (IsoRocker); a remote control; and a user interface. See the table below for a technological comparison with the predicate IF 3Wave.
Both Revitive IX and Compex IF 3Wave are mid-frequency (20-80Hz) muscle stimulator devices with biphasic pulses, and both operate in a range which balances between comfort and effective contractions. While there are minor differences in the values for certain of the technological features, the key parameters of the Revitive IX and Compex IF 3Wave are within the same range.
## Performance Data
Biocompatibility and electromagnetic compatibility and safety testing, and other performance testing were conducted. In all instances, the Revitive IX functioned as intended and the results observed were as expected.
#### Substantial Equivalence
The Revitive IX is as safe and effective as the IF 3Wave Interferential Stimulator System and the Lifecare Garment Electrodes. The Revitive IX has the same intended uses and similar indications, technological characteristics, and principles of operation as its predicate devices. The minor technological differences between the Revitive IX and its predicate devices raise no new issues of safety or effectiveness. Performance data demonstrate that the Revitive IX is as safe and effective as the predicate devices. Thus, the Revitive IX is substantially equivalent.
| Basic Unit Characteristics | | |
|----------------------------------------------------------------------------|----------------------------------------------------------------|------------------------------------------------------------------------------|
| | Compex IF 3Wave -<br>NMES mode | Revitive IX |
| 510(k) Number | K050046 | |
| Device Name, Model | IF 3Wave Model 7110S | REVITIVE IX, RIX |
| Manufacturer | Compex Technologies, Inc | Actegy Ltd |
| Power Source(s) | 3.6Vdc Lithium Ion<br>Polymer rechargeable<br>battery, 3000mAh | Power adaptor<br>Input: 100-240V, 50/60Hz,<br>0.18A.<br>Output: 5.0Vdc, 1.0A |
| Method of Line Current Isolation | Transformers isolation | Transformers isolation |
| Basic Unit Characteristics | | |
| | Compex IF 3Wave -<br>NMES mode | Revitive IX |
| Patient Leakage Current2 | | |
| Normal condition ( $\mu$ A) | <0.1 $\mu$ A (*) | Patient leakage: 6.21 $\mu$ A max<br>Enclosure leakage: 5.99 $\mu$ A max |
| Single fault condition ( $\mu$ A) | 2.4 $\mu$ A (*) | Patient leakage: 8.36 $\mu$ A max<br>Enclosure leakage: 7.95 $\mu$ A max |
| Number of Output Modes | 3 + Combo (IF/NMES) | 1 |
| Number of Output Channels | 2 | 2 (1 for sole, 1 for body pads) |
| Synchronous or Alternating? | Alternating | Alternating |
| Method of Channel Isolation | Transformer | Transformer |
| Regulated Current or Regulated Voltage? | Regulated voltage up to 150V | Regulated voltage up to 150V |
| Software/Firmware/Microprocessor Control? | Yes | Yes |
| Automatic Overload Trip? | No | No |
| Automatic No-Load Trip? | Yes | No |
| Automatic Shut Off? | Yes | Yes |
| Patient Override Control? | Yes | Yes |
| Indicator Display: | | |
| On/Off Status? | Yes | Yes |
| Low Battery | Yes | n/a |
| Voltage/Current Level? | Yes (0 to 100V) | Yes (0V to 150V ) |
| Timer Range (minutes) | 15 to 30 mins (NMES pre-set modes) | 1 to 60 mins |
| Compliance with Voluntary Standards? | UL 60601-1, CSA C22.2<br>No.601-1-M90 | EMDD<br>(93/42EEC),EN60601-1-<br>2:2007 |
| Compliance* with 21 CFR 898?<br>(*Becomes mandatory beginning May 9, 2000) | 21 CFR Part 898 (*) | Complies |
| Weight | 323g with battery | 1725g (not including PSU) |
| Dimensions (mm) [W x H x D] | 98.5mm x 160mm x<br>33.5mm | Ø360mm x 75mm overall<br>height |
| Housing Materials and Construction | Unknown | Casing/body ABS,<br>footpads NBR |
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(*) Refer to Compex 510(k) application K050046
:
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Image /page/3/Picture/0 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo features a stylized eagle with its wings spread, and the words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" are arranged in a circular pattern around the eagle. The logo is black and white.
### DEPARTMENT OF HEALTH & HUMAN SERVICES
Public Health Service
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
June 28, 2013
Actegy Ltd. c/o John J. Smith, M.D., J.D. Hogan Lovells US LLP 553 13th Street NW Washington, DC 20004
Re: K123354
Trade/Device Name: Revitive IX Regulation Number: 21 CFR 890.5850 Regulation Name: Powered Muscle Stimulator Regulatory Class: Class II Product Code: IPF Dated: May 28, 2013 Received: May 28, 2013
Dear Dr. John Smith:
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-related adverse events) (21 CFR 803); good manufacturing practice requirements as set
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Page 2 - Dr. John Smith
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 Small Manufacturers, International and Consumer Assistance at its tollfree number (800) 638-2041 or (301) 796-7100 or at its Internet address
hup://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR 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/ReportalProblem/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 Small Manufacturers. International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm.
Sincerely yours.
# Joyce M. Whang -S
for
Victor Krauthamer, Ph.D. Acting 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): K123354
Device Name: _ Revitive IX_
Indications For Use:
The Revitive IX device is indicated for:
- · Relaxation of muscle spasms
- Prevention or retardation of disuse atrophy �
- Increasing local blood circulation ●
- Muscle re-education .
- Immediate post-surgical stimulation of calf muscles to prevent venous . thrombosis
AND/OR
- Maintaining or increasing range of motion .
Prescription Use × (Part 21 CFR 801 Subpart D) Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
| | 1<br>S<br>1<br>------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | |
|---|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--|
| 1 | | |
(Division Sign Off) Division of Neurological and Physical Medicine Devices (DNPMD)
510(k) Number _ K123354
Page 1 of 1
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.