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Tommee Tippee Closer to Nature® Electric Breast Pump is used to express and collect milk from the breast of a lactating woman.

This electric breast pump product is designed to provide everything a mother will need to start sterilizing, expressing, storing and feeding. The pump unit has 3 alternate settings: light, medium and high suction levels during expression. The collect and protect breast milk storage system enables the user to express directly into the small graduated 2 oz pot, which fits into "Closer to Nature" bottles for feeding. The product is designed to use, one pot size for expressing, storing and feeding. This device is Mains or Battery powered.

Here's a breakdown of the acceptance criteria and study information for the Tommee Tippee Closer to Nature® Electric Breast Pump, based on the provided text:

Acceptance Criteria and Reported Device Performance

The acceptance criteria are not explicitly stated as numerical targets in a formal table; instead, the device performance is measured against a legally marketed predicate device (Medela AG, SwingTM electric breast pump) to demonstrate substantial equivalence. The "acceptance criteria" can therefore be inferred as demonstrating no significant difference or (in one case) a slight improvement compared to the predicate device.

Important Note: The document consistently concludes "This shows there is no significant difference in the devices," even when numerical values are different (e.g., 180 mL vs 150 mL or -20 kPa vs -29 kPa). This indicates that the observed differences were considered within acceptable limits for substantial equivalence.

Study Details

1. Sample size used for the test set and the data provenance:

   • The document does not specify sample sizes for the tests conducted. It refers to "A direct comparison of the pumps was carried out," implying a limited, technical comparison rather than a large-scale clinical study with a "test set" of participants in the traditional sense.
   • Data provenance: Not explicitly stated, but the nature of the tests (direct measurement of pumps, simulated use) suggests laboratory or engineering testing rather than human clinical data from specific countries. It's likely internal testing conducted by Mayborn Group Limited.
   • Retrospective or prospective: Not applicable in the traditional sense for these engineering tests. These were likely prospective tests for the purpose of the 510(k) submission.

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

   • Not applicable. The "ground truth" here is objective physical measurements (vacuum, fluid displacement, material compliance with regulations) rather than expert interpretation of complex data (e.g., images).

3. Adjudication method for the test set:

   • Not applicable. The "ground truth" is based on direct physical measurements, not subjective expert opinion requiring adjudication.

4. 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. This is a medical device (breast pump) and not an AI-powered diagnostic imaging device. An MRMC study is not relevant here.

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

   • Yes, in a way. The tests described (measurements of vacuum, fluid displacement, material compliance) are evaluations of the device's inherent performance characteristics, which is analogous to a "standalone" or "algorithm only" performance for an engineering device. There is no human-in-the-loop component in these specific comparative tests.

6. The type of ground truth used:

   • Objective physical measurements: Direct measurements of vacuum pressure (kPa), fluid volume (mL), and time.
   • Regulatory compliance: Verification that materials meet specified FDA regulations (21 CFR Parts 176, 177, 178) and ISO biocompatibility standards (ISO 10993).

7. The sample size for the training set:

   • Not applicable. This is not a machine learning or AI device that requires a training set. The "development" and "testing" phases refer to engineering design and verification, not algorithmic training.

8. How the ground truth for the training set was established:

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

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