Interferential Current Stimulation is indicated for : A)
1. Symptomatic relief and management of chronic and intractable pain.
Adjunctive treatment in the management of post-surgical and post-traumatic, acute pain 2. conditions.
B) Electrical Muscle Stimulation (EMS or Russian) is indicated for:
1 . Relaxation of Muscle spasm.
1. Prevention or Retardation of disuse atrophy.
1. Increasing local blood circulation.
1. Muscle re-education.
న్. Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis.
1. Maintaining or increasing range of motion.

Device Description

Johari 'Combo Stimulator' is a Neuromuscular Electrical Stimulation System, consists of programmable controller just like the predicate device Analgesic Pulsar AP-439. This unit Combo Stimulator allows the treatment specifically tailored to the precise needs of the patient in the clinic and for subsequent treatment off site. The clinicians can set the treatment parameters and lock it, so patient can repeatedly use the unit as prescribed by the clinician. The stimulation is most comfortable and the waveforms are unique.

It has been the clinician requirement many a times where they wanted to have a unit that can perform for muscle stimulation followed by interferential, so that, the painful muscle condition can be treated. Usually they have to turn the machine On and Off for different stimulation waveforms. The unique feature of Combo Stimulator is that in such above conditions, the clinicians can set the unit to perform in such a way that desired muscle stimulation can be followed by desired Interferential stimulation just by pressing one key "Combo", otherwise in itself the unit can perform muscle stimulation through all the outputs or Interferential stimulation through all the output.

The ease and simplicity by which the programming can be done is not more than touch of the key on the panel and LCD display. All the parameters remain in the system control except the amplitude & time which can be set by the patient himself. This unit is ergonomically designed, so that, it is comfortable to hold in hands.

It is portable and has two output channels, four channels works on rechargeable battery system. The unit can perform offsite wherein the hospital room, clinic or home while the predict device Analgesic Pulsar could not run on rechargeable battery system and so limited its use near to the AC outlet. This has always limited the clinicians to perform on their patient. Also many times, the patient may be in need to have a repeated treatment and this modified device "Combo Stimulator" can work in such cases. The Combo Stimulator can provide True Interferential with desired frequency, sweep selection and muscle stimulation of desired mode similar to Analgesic Pulsar.

AI/ML Overview

The provided document is a 510(k) Special Summary for the "Combo Stimulator IF-5000". It describes the device, its intended use, and compares its technical specifications and technological characteristics to an already legally marketed predicate device, the "Analgesic Pulsar AP-439".

Based on the information provided, here's a description of the acceptance criteria and the study that proves the device meets them:

1. Table of Acceptance Criteria and Reported Device Performance

The acceptance criteria for the Combo Stimulator IF-5000 are implicitly defined by its substantial equivalence to the predicate device, Analgesic Pulsar AP-439. The study demonstrates that the modified device has technical characteristics that are either identical, improved (e.g., portable, battery-operated), or within acceptable ranges compared to the predicate, and serves the same intended use.

Feature	Acceptance Criteria (based on Predicate AP-439)	Reported Device Performance (IF-5000)
Intended Use	Alleviate pain (Interferential), Muscle stimulation (EMS/Russian)	Identical
Power Source	110V AC, 50/60 Hz	1.2V x 4 Ni-Mh Rechargeable batteries
Number of Outputs	Two	Two
Channels	Four	Four
Synchronous	Yes	Yes
Max Output Current	100mA (max. @ 500 ohm loads)	Select PW & Ramp Burst - 90mA pp @ 500 ohm loadRussian & IFT – 54mA RMS @ 500 Ohm Load
Max Output Voltage	132V pp (max. @ 10K ohm loads)	Select PW & Ramp Burst - 90mA vpp @ 10K ohm loadRussian & IFT – 37V RMS @ 10k Ohm Load
Channel Isolation	Yes, confirm to ANSI 3.2.3.2, 1985	Yes, confirm to ANSI 3.2.3.2, 1985
Waveform	Monophasic, Biphasic, Sinewave & D.C. Line	Biphasic & Sinewave (with additional combination modes)
Current Density	3.55mA/cm2 (max @ 500 ohm load)	Select PW & Ramp Burst - 0.533 mA/cm2 @ 500 ohmRussian & IFT - 2.66mA/cm2 @ 500 Ohm
Power Density	0.127 W/cm2 (max @ 500 ohm load)	Select PW & Ramp Burst – 0.024 W/cm2 @ 500 ohmRussian & IFT – 0.072 W/cm2 @ 500 Ohm
Max Phase Charge	40 micro coulomb (max @ 500 ohms load)	Select PW & Ramp Burst: 18 micro coulomb (500 Ohm)Russian: 5.4 micro coulomb (500 Ohm)IFT: 2.7 micro coulomb (500 Ohm)
Modulation Options Amplitude	Preset IFT only	Preset IFT & Russian only
Modulation Options Frequency	IFT section only	IFT section only
Size	12.2" (l)X 3.5" (h)X 7.5" (d)	3.9"(l) x 1.6"(h) x 4.0(d)
Weight	5.5 Lb	1 Lb
Microcontroller	87C51 (12M Hz crystal)	HMOS Micro-controller
Display	LED display	LCD (Liquid Crystal Display)
Safety Features	Insulation through transformers, membrane keypads, auto intensity reduction on failure.	Identical, plus self-contained safety circuit, open/short circuit performance.

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 describes a comparison to a predicate device (Analgesic Pulsar AP-439) rather than a clinical trial with a specific test set of patients/data. Therefore, there is no explicit sample size or data provenance provided for a test set in the traditional sense of a clinical study. The evaluation focuses on engineering and performance specifications.

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)

This is a regulatory submission for a device modification, relying on technical specifications and functional equivalence. No experts are mentioned as establishing ground truth for a test set, as this is not a study assessing diagnostic accuracy or clinical outcomes based on interpretation. The "ground truth" for the device's acceptable performance is its compliance with recognized standards (ANSI 3.2.3.2, 1985 for channel isolation) and demonstration of equivalent (or improved) technical characteristics to a legally marketed predicate device.

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

Not applicable. As noted above, this is a technical comparison for regulatory clearance, not a clinical study involving human judgment or interpretation requiring an adjudication method.

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

No MRMC comparative effectiveness study was done. This is a medical device for physical medicine applications, not an AI or imaging device where such a study would typically be performed.

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

Not applicable. This device is an electrical stimulator, not an algorithm. Its performance is inherent in its hardware and firmware function, which is designed to be user-controlled ("human-in-the-loop" in the sense of a clinician/patient operating it). The "standalone" performance here refers to its electrical and functional characteristics as presented in the technical specifications.

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

The "ground truth" for this submission is the documented technical specifications and safety standards compliance of the predicate device (Analgesic Pulsar AP-439), as well as general engineering principles and safety regulations for electrical medical devices. The manufacturer demonstrates that the modified device's specifications and functionality are substantially equivalent to or improved upon the predicate device's established performance, which was already accepted by the FDA.

8. The sample size for the training set

Not applicable. This is a hardware medical device submission, not a machine learning or AI context that would involve training sets.

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

Not applicable. As per point 8, there is no training set for this type of device submission.

Summary

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Jo-hapi digital
Image /page/0/Picture/1 description: The image contains two quality assurance logos. The logo on the left has a large "R" in the center, surrounded by the text "REGISTER QUALITY ASSURANCE ISO 9001". The logo on the right has a crown above a check mark, with the text "UKAS QUALITY Management" below. The text "ISO 9001 Certified" is at the bottom of the image.

Johari Digital Healthcare Ltd.

REGD. OFFICE : EC-1,2,3, Electronics Complex, Light Industrial Area, Jodhpur - 342 003 (Raj) INDIA Phone : 91-291-741183, 304591 (F), Fax : 742289, E-mail : joharicare@sify.com, joharis@ndf.vsnl.net.in Website : www.jo-hari.com

ANNEXURE 'VIII'

SUMMARY

DEC 2 0 2002

JOHARI DIGITAL HEALTHCARE LTD.EC-1-2-3, Electronics Complex, Light Industrial Area,Jodhpur 342003 (INDIA)PHONE: +91-291-2741183 (F), 2430028 (R) FAX: +91-291-2742289E-mail: joharicare@sify.com
		"Special 510(k) Summary"
Submitter's name	:	JOHARI DIGITAL HEALTHCARE LTD.
Address	:	EC-1-2-3, Electronics ComplexLight Industrial AreaJodhpur - 342003 INDIA
Phone	:	+91-291-741183
FAX	:	+91-291-2742289
E-mail	:	joharicare@sify.com
Contact Person	:	Nisha Johari
Date of Summaryis submitted	:	27.11.2002
Resubmitting on	:	N.A.

8.1

Sales & Service Office : DELHI : 101-A, M.C. Bhawan, 11/56, D. B. Gupta Marg, Karol Bagh, Delhi-05, Tel. # 3624527, 3549454 MUMBAI : 317, Veena Beena Shopping Centre, Opp. Bandra Stn. (V) Tel. # 022-6409446 Pager # 9602-157374 Fax : 6514955 CHENNAI : No. 16, 1st Floor, Duraiswamy Road, T. Nagar Tel. # 044-4310159 Pager # 9632-739632 INDORE : 14, R.K. Puram Colony, A.B. Road Tel. # 0731-263075 KANPUR : Tel. # 0512-610371

Better life for Better Today

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ANNEXURE 'VIII'

MODIFIED DEVICE FOR WHICH SUBMITTING

Trade Name :	Combo Stimulator IF-5000
Common Name :	Electrical Nerve & Muscle Stimulator
Classification Name :	Physical Medicine (Per 21 CFR Section 890) and Neurology (Per 21 CFR Section 882-5890).

. .

LEGALLY MARKETED DEVICE

Analgesic Pulsar AP-439	:	Nerve & Interferential Stimulator510(k) Number K993229
Manufacturer	:	JOHARI DIGITAL HEALTHCARE LTD
Address	:	EC-1-2-3, ELECTRONIC COMPLEX,LIGHT INDUSTRIAL AREA,JODHPUR – 342 003 INDIA
Tel.	:	+91-291-2741183

+91-291-2741183

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ANNEXURE 'VIII'

DESCRIPTION OF MODIFIED DEVICE IF-5000

Combo Stimulator IF-5000 comes complete with all the necessary components to perform Pain Relief & Electrical Stimulation. Below is a list of items that are included:

1.	Combo Stimulator IF-5000 unit	01
2.	Electrode Cable (4 Core)	02
3.	Electrode 2.75" Round Diameter(Self Adhesive)	08
4.	Adapter	01
5.	Rechargeable batteries	04
5.	Manual	01
6.	Carry Bag	01

The only difference in these two devices is that:

Predicate Device AP-439 is a bigger in size. a)
Predicate Device AP-439 uses direct AC mains whereas Combo Stimulator IF-5000 uses b) rechargeable battery system and makes it much more safe and effective.
Both the units have two outputs with four channels (8 electrodes). c)
Both are Micro-computer controlled and digital displays guide through the programming. d)
Both are ABS molded ergonomically designed but since IF-5000 is small in size, which can e) be used repeatedly and at home also.

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INTENDED USE OF MODIFIED DEVICE IF-5000

Modified unit "Combo IF 5000" has similar intended use as predicate device Analgesic Pulsar AP-439. Both the electrical stimulators are to be used in Physical Medicine by Clinicians and Therapists.

INTENDED USE

Interferential Current Stimulation is indicated for : A)
1. Symptomatic relief and management of chronic and intractable pain.
Adjunctive treatment in the management of post-surgical and post-traumatic, acute pain 2. conditions.
B) Electrical Muscle Stimulation (EMS or Russian) is indicated for:
1 . Relaxation of Muscle spasm.
1. Prevention or Retardation of disuse atrophy.
1. Increasing local blood circulation.
1. Muscle re-education.
న్. Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis.
1. Maintaining or increasing range of motion.

INTENDED USE OF ANALGESIC PULSAR AP-439

(A) Interferential current stimulation , Premodulated Bipolar Mode and Faradic Stimulation is indicated for :

1. Symptomatic relief and management of chronic, intractable pain.
1. Adjunctive treatment in the management of post-surgical and post-traumatic, acute pain conditions.

(B) Electrical Muscle Stimulation ( Russian and Galvanic-interrupted) is indicated for:

1. Relaxation of Muscle spasm.
1. Prevention or Retardation of disuse atrophy.
1. Increasing local blood circulation.
1. Muscle re-education.
1. Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis.
1. Maintaining or increasing range of motion.

(C) Galvanic-DC Continuous mode is indicated for:-

1. Relaxation of muscle spasm.

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TECHNICAL SPECIFICATIONS OF THE MODIFIED DEVICE IF-5000

IF-5000 has basically same Technical Specification as predicate Analgesic Pulsar AP-439.

Power SourceNumber of outputsChannelsSynchronous	: 1.2V x 4 Ni-Mh Rechargeable batteries: Two: Four: Yes
Max out put current	: Select PW & Ramp Burst - 90mA pp @ 500 ohm loadRussian & IFT – 54mA RMS @ 500 Ohm Load
Max out put voltage	Select PW & Ramp Burst - 90mA vpp @ 10K ohm loacRussian & IFT – 37V RMS @ 10k Ohm Load
Channel isolation	: Yes, confirm to ANSI 3.2.3.2, 1985.
Waveform	: Biphasic & Sinewave
Current densityon 2" diameter electrodes	Select PW & Ramp Burst - 0.533 mA/cm2 @ 500 ohmRussian & IFT - 2.66mA/cm2 @ 500 Ohm
Power densityOn 2" diameter electrodes	Select PW & Ramp Burst – 0.024 W/cm2 @ 500 ohmRussian & IFT – 0.072 W/cm2 @ 500 Ohm
Max. phase chargeat 500 Ohmat 2 K Ohmat 10 K Ohm	Select PW & Ramp Burst18 micro coulomb7.4 micro coulomb1.8 micro coulomb
at 500 Ohmat 2 K Ohmat 10 K Ohm	Russian5.4 micro coulomb1.7 micro coulomb0.37 micro coulomb
at 500 Ohmat 2 K Ohmat 10 K Ohm	IFT2.7 micro coulomb0.85 micro coulomb0.18 micro coulomb
Modulation OptionsAmplitudeFrequencyMechanical SpecificationsPulse Width	Preset IFT & Russian onlyIFT section onlyWeight 1 Lb, Size: 3.9"(l) x 1.6"(h) x 4.0(d)Selectable PW: 50 to 400 $\mu$ s in step of 50Ramp Burst: 400 $\mu$ sRussian: 200 $\mu$ sIFT: 100 $\mu$ s

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TECHNICAL SPECIFICATIONS OF THE PREDICATE DEVICE DEVICE ANALGESIC PULSER AP-439

Power Source	: 110V AC, 50/60 Hz.
Number of outputs	: Two
Channels	: Four
Synchronous	: Yes
Max out put current	: 100mA (max. @ 500 ohm loads)
Max out put voltage	132V pp (max. @ 10K ohm loads)
Channel isolation	: Yes, confirm to ANSI 3.2.3.2 , 1985.
Waveform	: Monophasic, Biphasic, Sinewave & D.C. Line
Current densityon 2" diameterelectrodes	: 3.55mA/cm2 (max @ 500 ohm load)
Power densityon 2" diameterelectrodes	: 0.127 W/cm2 (max @ 500 ohm load)
Max. phase charge	: 40 micro coulomb (max @ 500 ohms load)
Modulation Options
Amplitude	: Preset IFT only
Frequency	: IFT section only
Mechanical Specifications	: Weight 5.5 Lb, 12.2" (l)X 3.5" (h)X 7.5" (d)
Pulse width	: Faradic: 100-400 (selectable)IFT: 125 µs. phase intervalRussian: 200 µsGalvanic: D.C.

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TECHNOLOGICAL CHARACTERISTICS

1. MICRO-CONTROLLER

Combo Stimulator IF-5000 & Predicate device Analgesic Pulsar AP-439 both the units are programmable Microcomputer Controlled. HMOS Micro-controller is used in IF-5000, which makes it reliable with Electro Magnetic Compatibility while in AP-439, Microcontroller 87C51 is used on a base of oscillating crystal at frequency 12M Hz.

2. MULTICHANNEL

Combo Stimulator IF-5000 & Predicate device AP-439 both the units have two outputs (four channels - eight electrodes) to provide different kind of stimulation to body sites.

MULTIWAVE SELECTIONS & PROGRAMABILITY 3.

Combo Stimulator IF-5000 produces selection of Muscle Stimulation (selectable pulse width mode, ramp burst & Russian 2500 Hz.) & Interferential Stimulation (frequency of 5000 Hz with three fixed sweep frequencies and one fixed beat frequency.) for pain relief through all the outputs. If desired, the clinicians can select the Combination, which combines EMS (for 1 minute and more) and IFT (for 1 minute and more) throughout the treatment session.

Predicate device AP-439 produces selection of Interferential (4000 Hz.-Vector & Premod with programmable sweep frequency), Russian (2500 Hz), Galvanic & Faradic (6 preset programs with selectable pulse width and pulse rate).

4. DISPLAY

Combo Stimulator IF-5000 has LCD (Liquid Crystal Display) for showing Treatment Mode, Contraction period. Relaxation period. Treatment Time and Intensity in both the outputs. Predicate device AP-439 has LED display to show Percentage Power, Cyclic On /Off Time, Treatment Time and balance Treatment Time.

5. POWER

Combo Stimulator IF-5000 works on rechargeable battery back up, so the treatment will not be limited to site near AC outlet and can be carried along. This makes the unit further safe. While Predicate device Analgesic Pulsar AP-439 works on 110V 60Hz AC mains only.

TACTILE TOUCH CONTROL 6.

Both the units are beautifully designed with the Membrane Panel, provides easy touch entry for treatment selection. The audible note with each key entry ensures clinician that selection is made.

7. CASING

Both the units are attractive and fitted in an ABS body enclosure. They are strong and sturdy. IF-5000 is handy, smaller and more ergonomic design, so that can be held in hand while AP-439 is a desktop unit.

8. WEIGHT

Combo Stimulator IF-5000 - Weigh 1.0 Lb., Predicate device AP-439 - weigh 5.5 lb.

{7}------------------------------------------------

ANNEXURE 'VIII'

SAFETY:

1. From circuitry to output again there is an insulation through transformers, thereby provision of double separations between mains & the human body (where output is to be applied)
1. Membrane key boards are provided which are known to withstand operation of key pressing much more than other mechanical methods.
1. Circuitry efficacy is good as matrix circuitry is used in keyboard & amplification circuitry is simple.
1. In case failure of any IC or component, the intensity will automatically come down to zero in
1. IF-5000 & AP-439 can be carried along for easy use at home or clinics.

SUMMARY

Combo Stimulator IF-5000 is not designed to be worm by patient.

IF-5000 has a self-contained safety circuit.

Open/short circuit performance: This IF-5000 functions normally after open and short circuited conditions between output jacks, with the device operating for maximum of 15 minutes, in each condition at the maximum available setting of pulse width, pulse rate and pulse amplitude,

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DEPARTMENT OF HEALTH & HUMAN SERVICES

Public Health Service

DEC 20 2002

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

Nisha Johari Johari Digital Healthcare Ltd. Vandana, 28 Nehru Park Jodhpur - 342003, India

Re: K024036

Trade/Device Name: Combo Stimulator IF-5000 Regulation Number: 21 CFR 890.5850 and unclassified Regulation Name: Powered Electrical Muscle Stimulator and Interferential Current Electrical Stimulator

Regulatory Class: Class II

Product Code: IPF and LIH Dated: November 27, 2002 Received: December 6, 2002

Dear Mrs. Johari:

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.

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 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); 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.

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Page 2 -- Mrs. Nisha Johari

This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification 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 contact the Office of Compliance at (301) 594-4659. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address http://www.fda.qov/cdrh/dsma/dsmamain.html

Sincerely yours.

Miriam C. Provost

of Celia M. Witter., Ph.D., M.D. Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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INDICATIONS FOR USE

Combo Stimulator IF-5000 provides combination of desired stimulating currents, which can be chosen by clinicians for the following treatment therapies:

INTENDED USE

Interferential Current Stimulation is indicated for: (A)
Symptomatic relief and management of chronic, 1. intractable pain.
1. Adjunctive treatment in the management of postsurgical and post-traumatic, acute pain conditions.
(B) Electrical Muscle Stimulation (EMS or Russian) is indicated for:
Relaxation of Muscle spasm. 1 .
Prevention or Retardation of disuse atrophy. 2.
Increasing local blood circulation. 3.
Muscle re-education. 4.
1. Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis.
1. Maintaining or increasing range of motion.

Miriam C. Provost

ivision of General, Restorative 1d Neurological Devices

K624036

Regulation Number and Section

§ 890.5850 Powered muscle stimulator.

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