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For Russian, and High Volt:

• Relaxation of muscle spasms
• Prevention or retardation of disuse atrophy
• Increase local blood circulation
• Muscle re-education
• Maintaining or increasing range of motion
• Immediate postsurgical stimulation of calf muscles to prevent venous thrombosis

For interferential and premodulated interferential:

• Symptomatic relief of chronic, intractable pain
• Management of pain associated with post-traumatic or post-operative conditions

For Ultrasound:
Application of therapeutic deep heat for the treatment of selected sub-chronic and chronic medical conditions such as:

• Pain Relief
• Reduction of muscle spasms
• Joint contractures

For TENS and EMS:

• Symptomatic relief and management of chronic intractable pain
• Adjunctive treatment in the management of post surgical and post traumatic acute pain condition

Ultrasound and Muscle Stimulator. Transcutaneous electrical nerve stimulator for pain relief, Powered muscle stimulator. Available as 2 channel stimulator, 4 channel stimulator, ultrasound, 2 channel stimulator with ultrasound, and 4 channel stimulator with ultrasound. Units are supplied with electrodes listed in 510(K) K050469, typically 2 x 2 inch. Units are supplied with a bottle of ultrasound coupling gel listed in 510(K) K012522, or similar gels already in the market.

Here's an analysis of the provided information regarding the acceptance criteria and study for the Sonic-Stim device:

Important Note: The provided document is a 510(k) summary and FDA clearance letter. These documents explicitly state "Non-clinical Testing: Not Applicable" and "Clinical Testing: Not Applicable." This means no specific clinical study was performed or required to demonstrate the device meets acceptance criteria in the traditional sense of a performance study with numerical endpoints. Instead, clearance was granted based on substantial equivalence to predicate devices.

Summary based on the provided document:

1. Table of Acceptance Criteria and Reported Device Performance:

   Acceptance Criteria	Reported Device Performance	Comments
   Not specified in terms of numerical performance metrics.	Not specified in terms of numerical performance metrics.	The device was cleared based on substantial equivalence, implying its performance is considered comparable to existing legally marketed predicate devices (K031077 and K010749) for the stated indications for use. No specific quantifiable acceptance criteria (e.g., accuracy, sensitivity, specificity for a diagnostic device) or corresponding performance data are presented.

2. Sample Size Used for the Test Set and Data Provenance:

   • Sample Size: Not applicable. No clinical test set was used for performance evaluation in this 510(k) submission.
   • Data Provenance: Not applicable.

3. Number of Experts Used to Establish Ground Truth for the Test Set and Qualifications:

   • Not applicable. No ground truth establishment by experts for a test set was conducted for this 510(k) submission.

4. Adjudication Method for the Test Set:

   • Not applicable. No test set requiring adjudication was used.

5. Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study:

   • Was one done? No.
   • Effect size: Not applicable.

6. Standalone (Algorithm Only Without Human-in-the-Loop) Performance Study:

   • Was one done? No. This device is a physical therapy device (ultrasound and stimulator), not an AI algorithm.

7. Type of Ground Truth Used:

   • Not applicable. For a device like this, the "ground truth" for its function would typically be its ability to generate specific electrical stimulation waveforms and ultrasound frequencies/intensities, for which non-clinical engineering tests would be done. However, based on the document's explicit statement, these were also deemed "Not Applicable" for this 510(k) and likely covered by the predicate device's existing clearance or general safety and performance standards.

8. Sample Size for the Training Set:

   • Not applicable. This is not an AI/machine learning device requiring a training set.

9. How the Ground Truth for the Training Set Was Established:

   • Not applicable.

Explanation of the 510(k) Context:

This 510(k) submission for the Sonic-Stim device achieved clearance by demonstrating substantial equivalence to existing predicate devices (Chattanooga Group Vectra GENiSYS and Biomedical Life Science, QUADSTAR II). This means the FDA determined that the Sonic-Stim device has the same intended use and the same technological characteristics as the predicate devices, or if it has different technological characteristics, that the different characteristics do not raise different questions of safety and effectiveness, and that the device is as safe and effective as the predicate device.

Therefore, the "acceptance criteria" were met by showing:

• The same intended use as the predicates (e.g., relaxation of muscle spasms, pain relief, increased local blood circulation, etc.).
• Similar technological characteristics (Ultrasound and Muscle Stimulator).
• Compliance with general controls (e.g., manufacturing practices, labeling).

No de novo clinical or non-clinical performance studies were required for this specific 510(k) submission because the device was deemed to be substantially equivalent to devices already on the market with a long history of safe and effective use.

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