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The Temena Nerve Location Needles are intended for use in regional anesthesia procedures, by anesthesiologists or other trained professionals, for the location of peripheral nerves with a nerve stimulator and/or with an ultrasound device.

The Temena Hybrid and USC Nerve Location Needles include a stainless steel cannula and connections for anesthetic administration and with the Hybrid Needle a connection for nerve stimulation. The needle is available in a range of lengths and 21 or 22 AWG. The USC (uncoated version) may be used for echo nerve location and the Hybrid (coated version) for both stimulator and echo location.

The provided text describes a 510(k) summary for the Temena Nerve Location Needles, which seeks substantial equivalence to predicate devices rather than proving performance against specific acceptance criteria through a clinical study with detailed statistical analysis. Therefore, much of the requested information cannot be directly extracted as it pertains to a different type of regulatory submission or study design.

Here's an analysis based on the provided document:

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

The document does not present a table of specific acceptance criteria. Instead, it relies on demonstrating substantial equivalence to existing predicate devices (Temena UPC Nerve Stimulator Needle K990100 and Havel Echostim Facit Tip K063380) by comparing key characteristics. The "reported device performance" is implicitly that it functions similarly to the predicate devices and the modifications (coating, surface for echo location) were confirmed with "acceptable results" under Design Controls. The table provided is a comparison chart of characteristics rather than an acceptance criteria table with performance metrics.

2. Sample size used for the test set and the data provenance (e.g. country of origin of the data, retrospective or prospective)

The document mentions that "Testing has been performed under Design Controls to confirm these changes with acceptable results." However, it does not specify the sample size for any test set, nor does it provide details on the data provenance (e.g., country of origin, retrospective or prospective). This information is typically found in detailed validation reports, which are not part of this 510(k) summary. Given the nature of a 510(k) for a Class II device like a needle, the "testing" likely refers to bench testing (e.g., electrical conductivity, mechanical strength, biocompatibility, coating adhesion, visualization properties for ultrasound) rather than a clinical study with human subjects.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts (e.g. radiologist with 10 years of experience)

This information is not provided in the summary. For a device like this, the "ground truth" for performance would likely be established through objective measurements in laboratory or simulation settings, not typically by expert consensus on clinical data in the way an AI diagnostic device would.

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

This information is not provided. Given the type of device and the "substantial equivalence" pathway, a formal adjudication process for a test set, as seen in clinical trials for diagnostic devices, is not describednor is it expected for this type of submission.

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

No MRMC comparative effectiveness study was done or reported. This device is a medical instrument (needle) for nerve location, not an AI diagnostic tool. Therefore, the concept of "human readers improve with AI" does not apply.

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

Not applicable. This is a medical device (needle), not an algorithm or AI system.

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

The document does not explicitly state the type of "ground truth" used. However, for a nerve location needle, the "ground truth" for its performance would likely be based on:

• Physical and electrical properties: Bench testing for electrical impedance, mechanical strength, coating integrity, and ultrasonic visibility.
• Biocompatibility: In vitro and/or in vivo testing (not described here but standard for implanted devices).
• Functionality: Demonstration that the needle can deliver current for nerve stimulation and/or is visible under ultrasound as intended.

These would be measured against engineering specifications and industry standards rather than human-derived ground truths like pathology or expert consensus.

8. The sample size for the training set

Not applicable. This is a physical medical device, not an AI model requiring a training set.

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

Not applicable. This is a physical medical device, not an AI model.

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