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The 3M™ Attest™ Steam Chemical Integrators are designed to respond to all critical parameters over a specified range of steam sterilization cycles. The integrating indicator is intended to be placed in each pack, container, tray or other containment device to function as an independent monitor of critical parameters for the following sterilization cycles:

Minimum Stated Values for 3M™ Attest™ Steam Chemical Integrators as determined in a resistometer:

| 250°F/121°C
16.5 Minutes | 270°F/132°C
2.0 Minutes | 273°F/134°C
1.4 Minutes | 275°F/135°C
1.2 Minutes |
|-----------------------------|----------------------------|----------------------------|----------------------------|

3M™ Attest™ Steam Chemical Integrators are chemical indicators consisting of a paper wick and a steam and temperature sensitive chemical pellet contained in a paper/film/foil laminate. The chemical pellet melts and migrates as a dark color along the paper wick. The migration is visible through a window marked ACCEPT or window marked REJECT; the extent of migration depends on steam, time, and temperature.

Here's a breakdown of the acceptance criteria and the study information for the 3M™ Attest™ Steam Chemical Integrators, based on the provided text:

1. Table of Acceptance Criteria and Reported Device Performance

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

The document states that the testing was performed on the 3M™ Attest™ Steam Chemical Integrators, which are identical to previously cleared devices (K193254) and were tested using "identified test methodology". However, the specific sample sizes used for each test criterion in the current submission's test set are not explicitly mentioned.

The data provenance is implied to be from 3M Company's internal testing, as it's a submission for their device. The nature of the tests (resistometer, simulated use, dry heat, side-by-side with BI, color stability) suggests controlled laboratory and simulated clinical environments. It is a nonclinical study, likely prospective for the specific tests performed to demonstrate equivalence or performance.

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

This information is not provided in the document. The tests seem to rely on objective measures (e.g., time to reach endpoint, color change, resistometer readings) rather than subjective expert assessment of an outcome. For 'Endpoint Color Stability', the "endpoint decision must remain unchanged" implies a clear, objective visual criterion rather than expert consensus on interpretation.

4. Adjudication Method for the Test Set

The document does not specify an adjudication method (e.g., 2+1, 3+1, none). Given the tests are physical/chemical performance evaluations, it's likely they rely on objective measurements and established criteria, reducing the need for adjudication by multiple human observers.

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

No, a MRMC comparative effectiveness study was not done. This type of study typically involves human readers interpreting diagnostic images or data with and without AI assistance to measure improvement in diagnostic accuracy or efficiency. The 3M™ Attest™ Steam Chemical Integrators are physical/chemical sterilization process indicators, not an AI-powered diagnostic device, so such a study would not be applicable.

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

Yes, the studies reported are standalone performance evaluations of the device itself. The chemical integrators function independently to indicate sterilization parameters; there is no human "in-the-loop" once the integrator is placed in the sterilization cycle. The performance described (e.g., time to "ACCEPT" or "REJECT", endpoint not met in dry heat, correlation with BI) is inherent to the device's chemical and physical properties.

7. Type of Ground Truth Used

The ground truth for these tests is based on established physical and chemical principles and standards for sterilization.

• For SV (Stated Value) testing: It refers to a "stated test organism with stated D and z values," indicating a biological effectiveness standard. The ground truth for what constitutes a successful sterilization cycle (leading to an "ACCEPT" reading) is benchmarked against the known inactivation kinetics of biological indicators (BIs) and the physical parameters (time, temperature, steam) required for sterilization.
• For Health Care Facility Simulated Use Testing: The ground truth is "customer acceptable performance in cleared customer use sterilization cycles" and "failing conditions." This implies real-world or simulated real-world conditions where the outcome of sterilization (successful or failed) is known through other means (e.g., standard monitoring, biological indicators).
• For Dry Heat Testing: The ground truth is the absence of saturated steam, and the expected outcome for the device (not reaching endpoint).
• For Side-by-Side Testing with Biological Indicator: The ground truth is the performance of the biological indicator (BI), which is considered the gold standard for sterilization efficacy. The chemical integrator's performance is compared directly against the BI's inactivation.
• For Endpoint Color Stability: The ground truth is the initial "ACCEPT" or "REJECT" endpoint color, with the expectation that it should not change over time.

8. Sample Size for the Training Set

This question is not applicable as the 3M™ Attest™ Steam Chemical Integrators are not an AI or machine learning device that requires a training set. They are physical/chemical indicators.

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

This question is not applicable for the same reason as above.

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The 3M™ Attest™ Steam Chemical Integrators are designed to all critical parameters over a specified range of steam sterilization cycles. The integrating intended to be placed in each pack, pouch, container, tray or other containment device to function as an independent monitor of critical parameters for the following sterilization cycles:

Minimum Stated Values for 3M™ Attest™ Steam Chemical Integrators as determined in a resistometer: 250°F / 121°C: 16.5 minutes 270°F/ 132°C: 2.0 minutes 273°F/ 134°C: 1.4 minutes 275°F/ 135°C: 1.2 minutes

3M™ Attest™ Steam Chemical Integrators are chemical indicators consisting of a paper wick and a steam and temperature sensitive chemical pellet contained in a paper/film/foil laminate. The chemical pellet melts and migrates as a dark color along the paper wick. The migration is visible through a window marked ACCEPT or window marked REJECT; the extent of migration depends on steam, time, and temperature.

The provided text describes the acceptance criteria and study proving the device meets those criteria, specifically for the 3M™ Attest™ Steam Chemical Integrators (K191236).

Here's the breakdown of the information requested:

1. A table of acceptance criteria and the reported device performance

2. Sample size used for the test set and the data provenance

The document does not specify the exact sample sizes (number of integrators) used for each test. However, it indicates that the testing was conducted in accordance with "FDA Guidance for Industry and FDA Staff: Premarket Notification [510(k)] Submissions for Chemical Indicators, issued December 19, 2003 as well as ANSI/AAM/ISO 11140-1:2014." These standards would define the appropriate sample sizes for such tests.

The data provenance is not explicitly stated in terms of country of origin or whether it was retrospective or prospective. However, given that this is a 510(k) submission to the US FDA, it can be inferred that the studies were conducted by or on behalf of 3M Company, located in St. Paul, Minnesota, USA. The nature of the tests ("Nonclinical testing") suggests prospective laboratory-based studies rather than retrospective clinical data.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts

This information is not applicable and therefore not provided in the document. The device is a chemical indicator for sterilization processes. Its "ground truth" (i.e., whether sterilization conditions were met or not, or if it indicates "ACCEPT" or "REJECT") is determined by objective physical and chemical reactions under controlled laboratory conditions using resistometers and simulated use cycles, not by expert human interpretation like in medical imaging. The performance is assessed against established physical parameters and the performance of biological indicators, not human expert consensus.

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

Not applicable. As explained in point 3, the output of the chemical indicator is an objective visual change (migration of a dark color to an ACCEPT or REJECT window). There is no human interpretation or adjudication process described for determining the device's output.

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 passive chemical indicator, not an AI-assisted diagnostic tool that would involve human readers. Therefore, an MRMC study and AI assistance are irrelevant to its evaluation.

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

This refers to the core performance of the device itself. The "Nonclinical Testing" summarized in the document is essentially the standalone performance evaluation of the chemical indicator. The device (chemical indicator) intrinsically operates "standalone" as a physical/chemical system without human intervention or an algorithm in the traditional sense of medical devices. Its performance is directly observed and measured against physical parameters of sterilization cycles.

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

The "ground truth" for the performance of the 3M™ Attest™ Steam Chemical Integrators is established through:

• Physical Parameters: Measured steam temperature and exposure time in controlled resistometers.
• Biological Indicator Inactivation: The performance is correlated and compared to biological indicators (BIs), which contain resistant bacterial spores, serving as a gold standard for sterilization effectiveness. The acceptance criteria state "Chemical integrator parallels performance of BI and does not reach endpoint before BI is inactivated."
• Defined Pass/Fail Conditions: Precise conditions (e.g., minimum stated values, exposure to failing conditions) are set for evaluation.

8. The sample size for the training set

Not applicable. This device is a chemical indicator, not a machine learning or AI algorithm. Therefore, there is no "training set" in the context of data-driven model development. The device's performance is based on its inherent chemical and physical properties and manufacturing consistency, not on learned data.

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

Not applicable, as there is no training set for this device type.

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