The LIFECARE Arm & Leg Pain Relief System, model EV-820 is intended for temporary relief of pain associated with sore and aching muscles in the upper and lower extremities (arm and/or leg) due to strain from exercise or normal household and work activities

Device Description

The LIFECARE Arm & Leg Pain Relief System, model EV-820 is the model of OTC TENS intended for temporary relief of pain associated with sore and aching muscles in the upper and lower extremities (arm and/or leg) due to strain from exercise or normal household and work activities. Basically the stimulation model EV-820 is completely identical to that of model as mentioned in our previous submission of Everyway Low Back Pain Relief System, model EV-820(K110716). To change the indication for use for the treatment location as the chosen predicate devices, Everyway changed the design of electrode.

For the device included in this submission, we use the following of our 510(K) legally marketed predicate garment electrodes and self adhesive electrode :

<1>K103716, "Lifecare HC-88 Series Conductive Garments" together with our Lifecare TKF4080( 4x8 CM )/K083302 self adhesive electrode.

EV-820 is a selectable dual channel, 9V battery operated TENS device with the following features:

<1> The operation function is dual channels completely identical to the model being modified, EV-820 for low back pain relief(K110716).
<2> For the stimulation electrode, LIFECARE Arm & Leg Pain Relief System, model EV-820 uses our K103716 " Lifecare HC-88 Series Conductive Garment Electrodes" together with our Lifecare TKF4080( 4x8 CM )/K083302 self adhesive electrode as standard accessories.
<3> The output waveform is selectable pre-programming change among P1~P8.
<4> The output strength is adjustable at 0~80 mA, with maximum setting time 60 minutes counting from switching ON.
<5> The LCD display is provided for the indication of operation status including operation mode, output program mode, output intensity, time to cut-off, and battery low warning.

With the combination of the main device parts, the device can be worn on the Arm & Leg part of user so as to place the stimulation pads on the treatment location of Arm & Leg for over the counter use without prescription in temporary relief of pain associated with sore and aching muscles in the Arm & Leg.

AI/ML Overview

This document describes the 510(k) summary for the LIFECARE Arm & Leg Pain Relief System, model EV-820.

Here's a breakdown of the requested information:

1. Table of Acceptance Criteria and Reported Device Performance:

The provided document does not explicitly define acceptance criteria as pass/fail thresholds for clinical performance metrics (e.g., specific pain reduction percentages). Instead, the acceptance criteria are implicitly based on demonstrating substantial equivalence to predicate devices through device characteristics and electrical output comparisons.

The reported device performance primarily focuses on the electrical output characteristics of the device and direct comparison to predicate devices.

Acceptance Criteria (Implicit)	Reported Device Performance (EV-820)
Intended Use Equivalence	Intended for temporary relief of pain associated with sore and aching muscles in the upper and lower extremities (arm and/or leg) due to strain from exercise or normal household and work activities. This is identical to the predicate devices.
Technological Characteristics Equivalence	Selectable dual channel, 9V battery operated TENS device with selectable pre-programming change among P1~~P8, adjustable output strength of 0~~80mA, 60 minutes max setting time, LCD display. Uses K103716 "Lifecare HC-88 Series Conductive Garments" and Lifecare TKF4080(4x8 CM)/K083302 self-adhesive electrodes.
Electrical Output Equivalence (Current Density)	Glove: 0.00337 mA/cm² (Identical to Well-Life WL-2407, lower than Prizm 5000-Z) Sleeve & Knee: 0.00386 mA/cm² (Identical to Well-Life WL-2407, lower than Prizm 5000-Z) Sock: 0.00271 mA/cm² (Identical to Well-Life WL-2407, lower than Prizm 5000-Z) Conclusion: "same output level as that of WL-2407, but has a lower current... density than that of Prizm 5000-Z system while using the same electrode."
Electrical Output Equivalence (Power Density)	Glove: 0.00032 W/cm² (Identical to Well-Life WL-2407, lower than Prizm 5000-Z) Sleeve & Knee: 0.00036 W/cm² (Identical to Well-Life WL-2407, lower than Prizm 5000-Z) Sock: 0.00025 W/cm² (Identical to Well-Life WL-2407, lower than Prizm 5000-Z) Conclusion: "same output level as that of WL-2407, but has a lower... power density than that of Prizm 5000-Z system while using the same electrode."
Safety and Effectiveness (Non-Clinical Tests)	Performance Compliance Test (ANSI/AAMI NS4), Usability Study Report (IEC 60601-1-6), Electrical Compliance Test (IEC 60601-1), EMC Compliance Test (IEC 60601-1-2), Biocompatibility Test (ISO 10993-5 & ISO 10993-10). All conducted by manufacturer or accredited laboratory, demonstrating compliance.

2. Sample size used for the test set and the data provenance (e.g. country of origin of the data, retrospective or prospective)

The document does not describe a clinical "test set" in the traditional sense involving human subjects for performance evaluation. The "test set" for demonstrating electrical output equivalence consisted of various electrode types (Glove, Sleeve & Knee, Sock) used with a 1K ohm loading resistance.

Sample Size for Electrical Comparison: Not explicitly stated as a number of devices or measurements, but it refers to the comparison across three electrode types.
Data Provenance: The electrical output comparison was conducted by the manufacturer, EVERYWAY MEDICAL INSTRUMENTS CO.,LTD., based in Taiwan. This was a prospective measurement for the purpose of this 510(k) submission.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts (e.g., radiologist with 10 years of experience)

Not applicable. There was no clinical ground truth established by experts for a test set. The device's performance was evaluated through non-clinical bench testing and comparison to predicate devices, not through a clinical study with human subjects requiring expert assessment of outcomes.

4. Adjudication method (e.g. 2+1, 3+1, none) for the test set

Not applicable. Since there was no clinical test set requiring expert interpretation or adjudication, no such method was employed.

5. If a multi reader multi case (MRMC) comparative effectiveness study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance

Not applicable. This device is a Transcutaneous Electrical Nerve Stimulator (TENS) for pain relief, not an AI-powered diagnostic or assistive technology that would involve human readers or cases in an MRMC study.

6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done

Not applicable. This device is a TENS unit, which is a physical medical device delivering electrical stimulation, not an algorithm. Its "standalone" performance is assessed through its electrical output characteristics and safety testing.

7. The type of ground truth used (expert concensus, pathology, outcomes data, etc)

For the electrical output comparison, the "ground truth" was the measured electrical output (current and power density) of the predicate devices (Prizm 5000-Z System and Well-Life OTC TENS for Arm & Leg Pain Relief, model WL-2407) under controlled bench testing conditions, against which the EV-820's output was compared. There was no clinical ground truth (e.g., expert consensus on pain, pathology, or outcomes data) used for this 510(k) submission.

8. The sample size for the training set

Not applicable. There was no machine learning or AI component requiring a training set for this device.

9. How the ground truth for the training set was established

Not applicable, as there was no training set.

Summary

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EVERYWAY MEDICAL INSTRUMENTS CO.,LTD.

3F1., No. 5, Lane 155, Sec. 3,Peishen Rd, Shen Keng Hsiang, Taipei Hsien, Taiwan,

510(K) SUMMARY

This summary of 510(k) safety and effectiveness information is being prepared in accordance with the requirements of SMDA 1990 and 21 CFR 807.92 on August 03, 2011.

The assigned 510(k) number is: K J ] 24 / 5

1. Submitter's Identifications:
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Establishment:EVERYWAY MEDICAL INSTRUMENT CO., LTD. Address: 3Fl., No. 5, Lane 155, Sec. 3, Peishen Rd., Shenkeng Hsiang, Taipei Hsien 222, Taiwan Registration Number: 9616877 Contact Person: Robert Tu Phone : 886-2-2662-0038 Fax No: 886-2-2664-5566 e-mail : tu922@ms35.hinet.net

1. Name of the Device: LIFECARE Arm & Leg Pain Relief System, model EV-820.
1. Information of the 510(k) Cleared Device (Predicate Device):
- The Prizm 5000-Z System (K033122) l
- । Well-Life OTC TENS for Arm & Leg Pain Relief, model WL-2407(K091757)
1. Classification Information: Trade/Device Name: LIFECARE Arm & Leg Pain Relief System, model EV-820. Regulation Number: 21 CFR 882.5890 Regulation Name: Transcutaneous Nerve Stimulator Regulatory Class: II Product Code: NUH
1. Device Description:

For the device included in this submission, we use the following of our 510(K) legally marketed predicate garment electrodes and self adhesive electrode :

<1>K103716, "Lifecare HC-88 Series Conductive Garments" together with our Lifecare TKF4080( 4x8 CM )/K083302 self adhesive electrode.

EV-820 is a selectable dual channel, 9V battery operated TENS device with the following features:

<1> The operation function is dual channels completely identical to the model being modified, EV-820 for low back pain relief(K110716).

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EVERYWAY MEDICAL INSTRUMENTS CO.,LTD.

3F1., No. 5, Lane 155, Sec. 3,Peishen Rd, Shen Keng Hsiang, Taipei Hsien, Taiwan,

<2> For the stimulation electrode, LIFECARE Arm & Leg Pain Relief System, model EV-820 uses our K103716 " Lifecare HC-88 Series Conductive Garment Electrodes" together with our Lifecare TKF4080( 4x8 CM )/K083302 self adhesive electrode as standard accessories.
ﺘﺮ
<3> The output waveform is selectable pre-programming change among P1~P8.
<4> The output strength is adjustable at 0~80 mA, with maximum setting time 60 minutes counting from switching ON.
<5> The LCD display is provided for the indication of operation status including operation mode, output program mode, output intensity, time to cut-off, and battery low warning.

6. Intended Use:

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7. Comparison to the 510(k) Cleared Device (Predicate Device):

For the substantial equivalent comparison, the power level testing comparison with the chosen 510(K) cleared device, Prizm 5000-Z system and Well Life WL-2407, was conducted via using 1K ohm loading resistance for the garment electrodes. The comparison result is as the following table:

Electrode Type	Glove	Sleeve& Knee	Sock
Everyway EV-820	0.00337	0.00386	0.00271
Well-life WL-2407	0.00337	0.00386	0.00271
Prizm 5000-Z	0.00340	0.00385	0.00274

Current Density comparison: (Unit : mA/cm2 )

Power Density Comparison : (Unit : W/cm2 )

Electrode Type	Glove	Sleeve & Knee	Sock
Everyway EV-820	0.00032	0.00036	0.00025
Well-life WL-2407	0.00032	0.00036	0.00025
Prizm 5000-Z	0.00064	0.00072	0.00051

Based on this comparison result, we made a acknowledge that our EV-820 model has the same output level as that of WL-2407, but has a lower current and power density than that of Prizm 5000-Z system while using the same electrode. This result is completely similar to the comparison of WL-2407 and Prizm 5000-Z system. Therefore; we concluded that the Everyway Arm & Leg Pain Relief system is substantially equivalent to Well-Life WL-2407(K091757) and the Prizm 5000-Z system (K033122) in the feature of stimulation output characteristics.

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EVERYWAY MEDICAL INSTRUMENTS CO.,LTD.

3F1., No. 5, Lane 155, Sec. 3,Peishen Rd, Shen Keng Hsiang, Taipei Hsien, Taiwan,

1. Discussion of Non-Clinical Tests Verification Activities Performed to Determine the Safety and Performance of EV-820 are as the followings:
- 1> Performance Compliance Test according to ANSI/AAMI NS4 conducted by manufacturer
- 2> Usability Study Report according to IEC 60601-1-6 conducted by manufacturer.
- 3> Electrical Compliance Test according to IEC 60601-1 by accredited laboratory.
- 4> EMC Compliance Test according to IEC 60601-1-2 by accredited laboratory.
- 5> Biocompatibility Test for the support belt and stimulation electrode according to ISO 10993-5 & ISO 10993-10 by accredited laboratory.
1. Discussion of Clinical Test Validation Activities Performed to Determine the Effectiveness of Device are as the followings:

No particular Clinical Test was conducted for LIFECARE Arm & Leg Pain Relief System, model EV-820.

10. Conclusions

The LIFECARE Arm & Leg Pain Relief System, model EV-820, has the same intended use and technological characteristics as the cleared device of The Prizm 5000-Z System (K033122) and Well-Life OTC TENS for Arm & Leg Pain Relief, model WL-2407(K091757). Moreover, verification and validation tests contained in this submission demonstrate that the difference in the submitted model could maintain the same safety and effectiveness as that of cleared device.

In the other words, LIFECARE Arm & Leg Pain Relief System, model EV-820 is substantial equivalent with The Prizm 5000-Z System (K033122) and Well-Life OTC TENS for Arm & Leg Pain Relief, model WL-2407(K091757).

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Image /page/3/Picture/1 description: The image shows the logo for the Department of Health & Human Services - USA. The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the circumference. Inside the circle is a stylized symbol that resembles a caduceus, a traditional symbol of medicine, but with a more abstract and modern design.

Food and Drug Administration 10903 New Hampshire Avenue Document Control Room -WO66-G609 Silver Spring, MD 20993-0002

OCT 2 1 2011

Everyway Medical Instruments Co., LTD. c/o Mr. Robert Tu 3Fl. No.5 Lane 155, SEC 3 Peishen Rd. Shenkeng Hsiang Taipei Hsien 222 Taiwan

· Re: K112415

. Trade/Device Name: LIFECARE Arm & Leg Pain Relief System model EV-820 Regulation Number: 21 CFR 882.5890 Regulation Name: Transcutaneous electrical nerve stimulator for pain relief Regulatory Class: Class II Product Code: NUH Dated: August 19, 2011 Received: August 22, 2011

Dear Mr. Tu:

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

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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 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 go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. 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,

Kesia Alexander

for

Malvina B. Eydelman, M.D. Director Division of Ophthalmic, Neurological, and Ear, Nose and Throat Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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Indications For Use

K112415 510(k) Number (if known):

Device Name: LIFECARE Arm & Leg Pain Relief System, model EV-820.

Indications For Use:

Prescription Use (Part 21 CFR 801 Subpart D) OR

Over-The-Counter Use ブ (21 CFR 807 Subpart C)

(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)

Concurrence of CDRH, Office of Device Evaluation (ODE)

Bruce Drum

(Division Sign-Off) Division of Ophthalmic, Neurological and Ear, Nose and Throat Devices

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510(k) Number K112415

Regulation Number and Section

§ 882.5890 Transcutaneous electrical nerve stimulator for pain relief.

(a)
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.(b)
Classification. Class II (performance standards).