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The Powerheart AED G3 and the Powerheart AED G3 Automatic devices are intended to be used by personnel who have been trained in its operation. The user should be qualified by training in basic life support or other physicianauthorized emergency medical response.

The device is indicated for emergency treatment of victims exhibiting symptoms of sudden cardiac arrest who are unresponsive and not breathing. Postresuscitation, if the victim is breathing, the AED should be left attached to allow for acquisition and detection of ECG rhythm. If a shockable ventricular tachyarrhythmia recurs, the device will charge automatically and advise the operator to deliver therapy (G3) or automatically deliver the charge (G3 Automatic).

When the patient is a child or infant up to 8 years of age, or up to 55 lbs (25kg), the device should be used with the Model 9730 Pediatric Attenuated Defibrillation Electrodes. The therapy should not be delayed to determine the patient's exact age or weight.

The Powerheart® AED G3 and G3 Automatic are portable, battery operated, automated external defibrillators (AED). After applying the AED's electrodes (pads) to the patient's bare chest, the AED automatically analyzes the patient's electrocardiogram (ECG) and advises the operator to press the button and deliver a shock if needed. The AED uses one button and guides the operator through the rescue using a combination of voice prompts, audible alerts, and visible indicators. For the Powerheart AED G3 Automatic, the AED automatically delivers a shock if needed. The Cardiac Science G3 AEDs may be used in conjunction with an adaptor cable that allows the use of AAMI DF-80 compliant electrodes other than the Cardiac Science brand. This adaptor cable is provided as an accessory to the Cardiac Science AEDs.

1. Acceptance Criteria and Reported Device Performance

The provided document describes a Special 510(k) for modifications to the Powerheart AED G3 and G3 Automatic devices. The acceptance criteria and device performance are primarily evaluated through functional and safety testing to ensure equivalence with predicate devices.

2. Sample Size and Data Provenance

The document states that "Representative samples of the device and adapter cables were tested." However, it does not specify the exact sample size used for the functional and safety testing. The data provenance is derived from internal testing conducted by Cardiac Science Corporation in Bothell, WA. The study is prospective in the sense that the new device and adapter cables were subjected to testing.

3. Number and Qualifications of Experts for Ground Truth

Based on the provided document, there is no mention of external experts or a panel used to establish ground truth for a test set. The evaluation relies on the device meeting pre-defined functional and safety specifications.

4. Adjudication Method

Since there is no mention of a test set requiring expert interpretation or a ground truth established by experts, there is no adjudication method described in the document.

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

An MRMC comparative effectiveness study was not conducted as described in the provided document. The focus of this 510(k) is on demonstrating substantial equivalence of a modified device and accessory through functional and safety testing rather than evaluating reader performance.

6. Standalone (Algorithm Only) Performance Study

The document describes testing of the device and adapter cables as a complete system, including its automatic analysis of ECG and delivery/advising of shock. Therefore, a standalone performance of the algorithm without human-in-the-loop is inherent to its functionality. However, it does not explicitly present a separate "algorithm only" performance study distinct from the overall system's functional testing. The device itself is an automated external defibrillator, meaning its core function is algorithmic analysis and action.

7. Type of Ground Truth Used for Test Set

The "ground truth" for the test set (functional and safety testing) is based on pre-established system, safety, functional, and performance specifications. The device's ability to operate according to these engineering and regulatory standards serves as the ground truth. This is not clinical ground truth (e.g., pathology, outcomes data, or expert consensus on clinical diagnoses).

8. Sample Size for the Training Set

The document does not mention a training set or any machine learning/AI model training in the context of this 510(k) submission. Therefore, no sample size for a training set is provided. The device likely uses established algorithms for ECG analysis that predate this specific submission.

9. How the Ground Truth for the Training Set was Established

Since a training set is not mentioned, the method for establishing its ground truth is not applicable based on the provided information.

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