(210 days)
- Cadwell AmpliScan is a software-only device indicated for use with electroencephalographic (EEG) data from Cadwell Arc application software. Cadwell AmpliScan is distributed solely for use with Cadwell Arc software.
- The Cadwell AmpliScan device is for prescription use only by qualified medical practitioners, trained in Electroencephalography, who will exercise professional judgement when using the information.
- This device does not provide any diagnostic conclusion about the patient's condition to the user.
- Cadwell AmpliScan uses electroencephalographic (EEG) data to calculate and display a quantitative aEEG measure. This quantitative measure should always be interpreted by the user in conjunction with review of the original EEG waveforms. The aEEG quantitative measure of Cadwell AmpliScan is intended to monitor the state of the brain.
Cadwell AmpliScan is a software-only device distributed solely for use with the application software commonly known and marketed as Cadwell Arc software. Cadwell Ampliscan software is installed with installation of Arc software, and does not require installation or removal separate from the Arc application. The Cadwell AmpliScan software-only device applies the Amplitude-Integrated EEG (aEEG) algorithm referred to as the Cerebral Function Monitor (CFM) to stored data within the Cadwell Arc software, and stores and displays the results.
The provided text appears to be a 510(k) summary for the Cadwell AmpliScan, a software-only device. This document focuses on demonstrating substantial equivalence to a predicate device rather than presenting a detailed study with specific acceptance criteria and detailed performance metrics as one might find in a clinical trial report for an innovative device.
Therefore, the information requested by the user, particularly regarding acceptance criteria, sample sizes, expert qualifications, and detailed performance metrics, is not explicitly provided in the document in the format anticipated for a standalone clinical study. The document focuses on comparing the Cadwell AmpliScan to a predicate device based on technological characteristics and software verification/validation.
Here's a breakdown of what can be extracted based on the provided text, and what cannot:
1. Table of Acceptance Criteria and Reported Device Performance:
The document does not explicitly state acceptance criteria or quantify device performance in terms of metrics like sensitivity, specificity, accuracy, or similar measures commonly found in a study proving a device meets specific criteria. Instead, it relies on demonstrating substantial equivalence to a predicate device.
The "Performance Data" section states: "In the Substantial Equivalence Discussion, a comparison of outputs from Cadwell AmpliScan and the predicate with like input data demonstrate the resulting equivalence of analysis and display." This implies that the 'acceptance criterion' was that the output of Cadwell AmpliScan should be equivalent to that of the predicate device when given the same input data.
| Acceptance Criterion (Implied) | Reported Device Performance |
|---|---|
| Outputs are equivalent to predicate device for like input data. | "Comparison of outputs from Cadwell AmpliScan and the predicate with like input data demonstrate the resulting equivalence of analysis and display." |
| Software Verification and Validation conducted as per FDA guidance. | "Software Verification and Validation Testing were conducted and documentation was provided as recommended by FDA's Guidance for Industry and FDA staff." |
| No new issues of safety or effectiveness introduced by differences. | "No new issues of safety or effectiveness are introduced by the differences." |
2. Sample Size Used for the Test Set and Data Provenance:
The document does not specify a "test set" in terms of patient data. The evaluation was likely performed using various EEG data files (the "like input data") to compare outputs, but the number of such files or their origin (country, retrospective/prospective) is not mentioned. Given it's a software device processing existing data, the data would inherently be retrospective.
3. Number of Experts Used to Establish the Ground Truth for the Test Set and Qualifications:
The concept of "ground truth" established by experts for a test set is not discussed in this document. The evaluation was focused on the software's ability to produce equivalent outputs to an existing, legally marketed device (the predicate). The assessment of equivalence typically involves technical comparisons of algorithm implementation and output, not expert clinical interpretation of novel results.
4. Adjudication Method for the Test Set:
Not applicable, as no expert-adjudicated test set is described.
5. If a Multi Reader Multi Case (MRMC) Comparative Effectiveness Study was done:
No, an MRMC study was not done. The document does not mention human readers or AI assistance in a comparative effectiveness study. The device is software that calculates and displays a quantitative aEEG measure, not an AI to assist human readers directly in diagnosis.
6. If a Standalone (i.e., algorithm only without human-in-the-loop performance) was done:
Yes, this was a standalone (algorithm only) evaluation. The device itself is "software-only" and its performance was assessed by comparing its outputs to a predicate device. The document explicitly states, "Cadwell AmpliScan uses electroencephalographic (EEG) data to calculate and display a quantitative aEEG measure." It also clarifies that "This device does not provide any diagnostic conclusion about the patient's condition to the user." and "This quantitative measure should always be interpreted by the user in conjunction with review of the original EEG waveforms." This indicates that the device operates as an algorithm generating a measure, with interpretation left to a qualified medical practitioner.
7. The Type of Ground Truth Used:
The "ground truth" in this context is the output generated by the predicate device for the same input data, as the study aims to show equivalence. The document states a "comparison of outputs from Cadwell AmpliScan and the predicate with like input data demonstrate the resulting equivalence of analysis and display." This implies the predicate's output served as the reference for equivalence.
8. The Sample Size for the Training Set:
The document does not mention any "training set." This type of 510(k) submission, particularly for a device implementing a known algorithm (Cerebral Function Monitor/CFM), typically doesn't involve machine learning training on a large dataset. The substantial equivalence is based on the algorithm's implementation matching that of the predicate.
9. How the Ground Truth for the Training Set was Established:
Not applicable, as no training set or ground truth for a training set is mentioned.
§ 882.1400 Electroencephalograph.
(a)
Identification. An electroencephalograph is a device used to measure and record the electrical activity of the patient's brain obtained by placing two or more electrodes on the head.(b)
Classification. Class II (performance standards).