K150277 · Counter Scientific Development (Gz), Ltd. · NUH · Feb 12, 2016 · Neurology
Device Facts
Record ID
K150277
Device Name
Pain Therapy System, Model PTS-II
Applicant
Counter Scientific Development (Gz), Ltd.
Product Code
NUH · Neurology
Decision Date
Feb 12, 2016
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 882.5890
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
To be used for temporary relief of pain associated with sore and aching muscles in the upper and lower back due to strain from exercise or normal household work activities (Choose Mode A, B, or C) To be used for temporary relief of pain associated with sore and aching muscles in the upper extremities (Arms) due to strain from exercise or normal household work activities (Choose Mode A, B or C) To be used for temporary relief of pain associated with sore and aching muscles in the lower extremities (Legs) due to strain from exercise or normal household work activities (Choose Mode A, B or C) To be used for symptomatic relief and management of chronic, intractable pain associated with Arthritis (Choose Mode A) To stimulate healthy muscles in order to improve and facilitate muscle performance (Choose Mode B)
Device Story
Pain Therapy System (PTS-II) is a dual-channel, battery-operated (3.0V DC) TENS/EMS device for home, clinic, or hospital use. Device delivers electrical stimulation via two electrode cables and two pairs of pads. User selects from three pre-programmed output waveforms (Modes A, B, C) and three timer settings (10, 20, 40 min) using front-panel buttons. Intensity is adjusted via a side-mounted dial. Device functions by applying regulated voltage pulses to muscles/nerves to provide pain relief or muscle stimulation. Healthcare providers or patients operate the device to manage pain or facilitate muscle performance. Output is delivered directly to the skin via electrodes; clinical decision-making is guided by the user's symptomatic response to the stimulation modes.
Clinical Evidence
Bench testing only. No clinical data was conducted or relied upon. Testing included electrical safety (ANSI/AAMI ES60601-1), electromagnetic compatibility (IEC 60601-1-2), and performance of nerve/muscle stimulators (IEC 60601-2-10). Biocompatibility of electrode pads was established via reference to K132588.
Technological Characteristics
Dual-channel TENS/EMS device; 3.0V DC power (2x AAA batteries). Regulated voltage output. Waveforms: positive-going, reverse, and square wave. Pulse duration 170 μs; frequency 1-136 Hz. Materials: electrode pads (FDA cleared K132588). Standards: ANSI/AAMI ES60601-1, IEC 60601-2-10, IEC 60601-1-2. Connectivity: standalone. Sterilization: N/A.
Indications for Use
Indicated for temporary relief of pain in upper/lower back, arms, and legs due to exercise or household strain; symptomatic relief of chronic, intractable pain associated with arthritis; and stimulation of healthy muscles to improve performance. Contraindicated for patients with cardiac pacemakers, implanted defibrillators, or other implanted metallic/electronic devices; do not use with life-supporting or body-worn medical electronic devices.
Regulatory Classification
Identification
A transcutaneous electrical nerve stimulator for pain relief is a device used to apply an electrical current to electrodes on a patient's skin to treat pain.
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Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. Inside the circle is a stylized image of three human profiles facing to the right, with flowing lines representing hair or clothing.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
February 12, 2016
Counter Scientific Development (gz) Ltd % Guenter Ginsberg President Media Trade Corporation 11820 Red Hibiscus Drive Bonita Springs, Florida 34135
Re: K150277
Trade/Device Name: Pain Therapy System, Model PTS-II Regulation Number: 21 CFR 882.5890 Regulation Name: Transcutaneous Electrical Nerve Stimulator for Pain Relief Regulatory Class: Class II Product Code: NUH, NYN, NGX, GZJ Dated: January 8. 2016 Received: January 11, 2016
Dear Guenter Ginsberg:
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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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 yours,
# Michael J. Hoffmann -A
for 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) K150277
#### Device Name
Pain Therapy System, Model PTS-II
Indications for Use (Describe)
To be used for temporary relief of pain associated with sore and aching muscles in the upper and lower back due to strain from exercise or normal household work activities (Choose Mode A, B, or C)
To be used for temporary relief of pain associated with sore and aching muscles in the upper extremities (Arms) due to strain from exercise or normal household work activities (Choose Mode A, B or C)
To be used for temporary relief of pain associated with sore and aching muscles in the lower extremities (Legs) due to strain from exercise or normal household work activities (Choose Mode A, B or C)
To be used for symptomatic relief and management of chronic, intractable pain associated with Arthritis (Choose Mode A)
To stimulate healthy muscles in order to improve and facilitate muscle performance (Choose Mode B)
| Type of Use (Select one or both, as applicable) |
|-------------------------------------------------|
|-------------------------------------------------|
Prescription Use (Part 21 CFR 801 Subpart D)
|X | Over-The-Counter Use (21 CFR 801 Subpart C)
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## 510(k) SUMMARY
#### Date of Summary Prepared: 02/11/2016
| 1. Submitter's Name: | Counter Scientific Development (GZ) Ltd<br>2nd and 3rd Floor, Bldg 6, DaPian Industrial Zone<br>Tangxia Road, Tianhe District, Guangzhou 510665, China | |
|----------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------|--|
| Contact person: | Jiang Eagle<br>Tel: +86-20 -8328 9980<br>Fax: +86-20-38339500 | |
E-mail: Counter csd(@yahoo.com.cn & csd.counter(@gmail.com
#### 2. Proposed New Device:
Trade Name: Pain Therapy System, Model PTS-II Classification Name: TENS/EMS Device Regulation Number: 882.5890 & 882.5850 Product Code: NUH, NGX, NYN, GZJ Device Class: II
### 3. Predicate (cleared) Device:
OTC TENS, Model T1040 aka Aurawave 510(k) Number: K124055 Manufacturer: Endurance Therapeutics
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#### 4. Description of Proposed Device:
The Pain Therapy System, Model PTS-II is a selectable dual channel TENS and EMS device operated by DC 3.0V (AAA*2 batteries). It is made up of one main unit, two electrode cables, and two pairs of electrode pads.
There are 3 selectable, pre-programmed output waveforms (modes) to choose from. The two channels share one knob to adjust, the intensity are adjustable from 0 to 5. Running time can be selected among 10, 20 or 40min and recycled. There is a dial with on/off on the side that enables the device to be turned on or off, and it can be used to adjust the output intensity level, turn clockwise to increase intensity and turn anticlockwise to decrease the intensity. In the front of the device, there are 2 buttons and 6 indicator lights, in which one button is the mode selection button, and the other is for time selection. There are three modes A. B. C. respectively indicated by three indicator lights, which are on the right of the mode selection button. The device has 3 timing levels, namely 10, 20, 40 min, and indicated by three indicator lights, which are on the right of the timing selection button.
The device has been tested to and meets the requirements of the following recognized consensus standards:
ANSI/AAMI ES60601-1:2005+Corr.1(2006)+Corr.2(2007) general requirements for basic safety and essential performance
IEC 60601-2-10 Edition 2.0 2012-06 basic safety and essential performance of nerve and muscle stimulators. (Neurology)
IEC 60601-1-2 Edition 3:2007-03 medical electrical equipment - part 1-2: general requirements for basic safety and essential performance - collateral standard: electromagnetic disturbances - requirements and tests. (General II (ES/EMC))
## 5. Indication for Use:
This Pain Therapy System, Model PTS-II is:
To be used for temporary relief of pain associated with sore and aching muscles in the upper and lower back due to strain from exercise or normal household work activities (Choose Mode A. B. or C)
To be used for temporary relief of pain associated with sore and aching muscles in the upper extremities (Arms) due to strain from exercise or normal household work activities (Choose Mode A. B or C)
To be used for temporary relief of pain associated with sore and aching muscles in the lower extremities (Legs) due to strain from exercise or normal household work activities (Choose Mode A., B or C)
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To be used for symptomatic relief and management of chronic, intractable pain and relief of pain associated with Arthritis (Choose Mode A)
To stimulate healthy muscles in order to improve and facilitate muscle performance (Choose ModeB)
#### 6. Environment of Use:
Clinics, Hospitals and home environments
#### 7. Contraindications:
Do not use this device if you have a cardiac pacemaker, implanted defibrillator, or other implanted metallic or electronic device. Such use could cause electrical shock, burns, electrical interference, or death.
Do not use this device together with a life-supporting medical electronic device such as an artificial heart or lung.
Do not use this device together with a body-worn medical electronic device such as an ECG.
| 510(k) Number | K150277 | K124055 |
|-------------------------------------------------------------------|---------------------------|--------------------------------------------------------------------------------------------|
| Device Name and Model | PAIN THERAPY<br>SYSTEM | T1040 aka AUrawave |
| Manufacturer | Counter<br>Scientific | Endurance Therapeutics |
| Power Source | 3.0 v (2*1.5vAAA) | 4.5 v ( 3*1.5vAAA batteries ) |
| Method of Line Current Isolation | Use resistance to isolate | Use transformer to isolate |
| Patient Leakage Current | N/A | N/A |
| Normal Condition (μΑ) | N/A | N/A |
| Single Fault Condition (μA) | N/A | N/A |
| Average DC current<br>through electrodes when device<br>is on but | 0μA | 0μA |
| Numbers of Output Modes | 3 modes (A,B,C) | 10modes<br>(Mode1, Mode2, Mode3,<br>Mode4, Mode5, Mode6,<br>AUTO1, AUTO2, AUTO3,<br>AUTO4) |
#### 8. Technological Characteristics Compared to the Predicate Device
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| Number of<br>Output<br>Channels | Synchronous<br>or<br>Method of<br>Channel | 2 Synchronous | 1 Synchronous |
|--------------------------------------------|-------------------------------------------|---------------------|-------------------|
| | | Parallel connection | N/A |
| Regulated current or<br>regulated voltage? | | Regulated voltage | Regulated voltage |
| Parameter | Subject Device K150277 | Predicate Device K124055 |
|-------------------------------------------------------------------------------------------------|-------------------------------------------------------------|-----------------------------------------------|
| Mode or Program Name | PAIN THERAPY SYSTEM, | ELECTRO THERAPY PAIN RELIEF, T1040 |
| Waveform (e.g. positive-going, reverse, biphasic ) | Positive-going, Reverse and | Positive-going, Reverse and Biphasic |
| Shape(e.g., spike, rectangular, square wave) | square wave | square wave |
| Maximum Output Voltage ( Volts ) (+/-15%) | 88vp @500Ω (Mode B has max)<br>102vp @2kΩ<br>106vp @10kΩ | 40.7vp @500Ω<br>105.1vp @2kΩ<br>154.1vp @10kΩ |
| Maximum Output Current (+/-15%) | 176mA @500Ω (Mode B has max)<br>51.0mA @2kΩ<br>10.6mA @10kΩ | 81.4mA @500Ω<br>52.5.0mA @2kΩ<br>15.4mA @10kΩ |
| Duration of primary phase | 0 | 0 |
| Pulse Duration | 170 μs | 200 μs |
| Frequency | 1-136 Hz | 1-250 Hz |
| For multiphase waveforms only: | Symmetrical phases<br>Pulse Duration<br>N/A | N/A |
| Net charge (micro coulombs μC) per pulse) (If zero, state method of achieving zero net charge.) | 1.63μC @500Ω | 1.9μC @500Ω |
| Maximum Phase Charge (μC) | 29.9μC @500Ω | 16.9μC @500Ω |
| Maximum Current Density (mA/cm2, r.m.s.) | 8.31mA/cm² @500Ω | 3.84mA/cm² @500Ω |
| Maximum Average Current (average absolute value), mA | 2.22mA | 1.28mA |
| Maximum Average Power Density (using smallest electrode conductive surface area) | $0.115mW/cm^2 @500\Omega$ | $0.039mW/cm^2 @500\Omega$ |
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#### 9. Discussion of Non-Clinical Tests Performed for Determination of Substantial Equivalence is as follows:
Counter did not conduct, nor rely upon, clinical tests to determine substantial equivalence of the Pain Therapy System Model PTS-II vs. the predicate. Non-clinical testing was performed in order to validate the design according to the company's specified design requirements, and to assure conformance with the following voluntary design standards:
#### a. EMC and electrical safety
ANSI/AAMI ES60601-1:2005+Corr.1(2006)+Corr.2(2007) general requirements for basic safety and essential performance
IEC 60601-2-10 Edition 2.0 2012-06 basic safety and essential performance of nerve and muscle stimulators. (Neurology)
IEC 60601-1-2 Edition 3:2007-03 medical electrical equipment - part 1-2: general requirements for basic safety and essential performance - collateral standard: electromagnetic disturbances - requirements and tests. (General II (ES/EMC))
#### b. Biocompatibility
The electrode pads are the only body contacting parts. They have been FDA cleared under K132588.
#### c. Software
Based upon the test results it was concluded that the software performs within specifications and is safe to the stated intended use. Since a permanent hazard analysis is implemented in the software development process, and due to the clear software architecture, it is believed that the test protocol sufficiently verifies the software's main functional operation.
#### d. Cleaning
The cleaning instructions as described the Instruction Manual have been tested to be sufficient. Testing involved validation of the manual cleaning method as per the instructions. All testing concluded that the Pain Therapy System can be cleaned by the use of the methods described in the Instruction Manual.
#### 8. Conclusions:
The Counter Pain Therapy System, Model PTS-II has the same intended use and 5 | Page
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technological characteristics as the predicate device. Moreover, bench testing and safety report documentation demonstrate that the submitted device could maintain the same safety and effectiveness as that of predicate device. In the other words, the differences do not affect the intended use and do not raise any new questions of safety or effectiveness or alter the fundamental scientific technology of the device. Thus, the Counter Pain Therapy System, Model PTS-II is substantially equivalent to the predicate device.
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.