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The Toraysulfone™ Dialyzer, BS-L Series, is indicated for use in hemodialysis treatment of patients with acute or chronic renal failure.

The Toraysulfone Dialyzer, BS-L Series consists of highly permeable polysulfone hollow fibers housed in a polystyrene casing and secured at each end with polystyrene headers. High permeability dialyzers must be used only in conjunction with dialysis machines equipped with an ultrafiltration controller. The Toraysulfone Dialyzer, BS-L Series is provided in a range of three sizes based on the surface area of the hollow fiber membrane. The device is gammaray sterilized and intended for single use only.

The provided text describes the "Toraysulfone Dialyzer, BS-L Series," a medical device used for hemodialysis. The information details the device's technical characteristics, its intended use, and its equivalence to predicate devices, but it does not provide explicit acceptance criteria with specific numerical targets.

Here's a breakdown of the requested information based on the provided text:

Acceptance Criteria and Device Performance Study for Toraysulfone™ Dialyzer, BS-L Series

1. Table of Acceptance Criteria and Reported Device Performance

Note: The document explicitly states that "All samples met the acceptance criteria" for bench testing and that the device characteristics are "identical" or "similar" to predicate devices, implying that specific, pre-defined acceptance criteria were met. However, the exact numerical or qualitative targets for these criteria are not detailed in this 510(k) summary.

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

• Sample Size: Not specified. The document states "All samples met the acceptance criteria" for bench testing, but the number of samples is not given.
• Data Provenance: Not explicitly stated as retrospective or prospective. Bench testing data is typically generated in a lab setting. The document also mentions "published materials included in this 510(k) Notification" for some performance characteristics, but their provenance (e.g., country of origin) is not detailed.

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

Not applicable. This type of information is typically relevant for studies involving subjective assessments, such as image interpretation or clinical diagnosis. The Toraysulfone Dialyzer, BS-L Series is a physical medical device, and its performance is evaluated through objective bench testing and comparison to predicate devices, rather than expert-established ground truth on a test set in the same manner as an AI algorithm.

4. Adjudication Method for the Test Set

Not applicable for a physical device undergoing bench testing. Adjudication methods like "2+1" or "3+1" are used in studies where multiple human readers or algorithms assess discrete outcomes and discrepancies need to be resolved. Performance for this device is based on objective measurements from bench testing.

5. If a Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study Was Done, and Effect Size

No, an MRMC comparative effectiveness study was not done. This type of study is relevant for diagnostic or screening tools where reader performance is a key outcome. The Toraysulfone Dialyzer, BS-L Series is a treatment device, and its evaluation focuses on its physical and functional performance, not on human reader interpretation.

6. If a Standalone (Algorithm Only Without Human-in-the-Loop Performance) Was Done

Not applicable. This device is a physical hemodialyzer, not an AI algorithm.

7. The Type of Ground Truth Used

The "ground truth" for this device's performance evaluation largely consists of:

• Objective Measurements: Results from bench testing (e.g., flow and clearance data).
• Predicate Device Performance: Performance data from already legally marketed devices (Toraysulfone Dialyzer K002512 and Fresenius Optiflux 200NR Hemodialyzer K002277), which serve as the standard for substantial equivalence.

8. The Sample Size for the Training Set

Not applicable. As a physical medical device, there is no "training set" in the context of machine learning or AI algorithms. The device design and manufacturing processes are developed and refined, but not through a "training set" of data in the same way an AI model is.

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

Not applicable, as there is no training set in this context.

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