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510(k) Data Aggregation

    Why did this record match?
    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use

    U2 Total Knee System - PF+ is indicated in knee arthroplasty for reduction or relief of pain and/or improved knee function in skeletally mature patients with severe knee pain and disability due to rheumatoid arthritis, osteoarthritis, primary and secondary traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral condyle or pseudogout, posttraumatic loss of joint configuration, particularly when there is patellofemoral joint surface erosion, dysfunction or prior patellectomy, moderate valgus, varus, or flexion deformities. This device may also be indicated in the salvage or previously failed surgical attempts or for knee in which satisfactory stability in flexion cannot be obtained at the time of surgery. Femoral Component, PF+, Tibial Baseplate, PF+, Tibial Extension Stem, Patella, Onset, E-XPE, PF+, and Patella, Asymmetric Onset, E-XPE, PF+ are indicated for both cemented and cementless use.

    USTAR II Total Knee System

    1. Metastatic tumor (i.e. osteosarcoma, chondrosarcoma, giant cell tumor or osteoma) where massive resection and transplantation are needed.
    2. Severe knee joint damage resulting from trauma where massive resection and transplantation are needed.
    3. Non-inflammatory degenerative joint disease such as avascular necrosis, osteoarthritis, or traumatic arthritis.
    4. Revision of previously failed total joint arthroplasty, osteotomy, or arthrodesis.
    5. Joint instability resulting from excessive bone resection.

    For Femoral component, Hinged/ Tibial baseplate, Hinged/ Cemented tibial stem/ Cemented Straight stem, RHS, non coated/ Cemented Curved stem, RHS, non coated/ Cemented Straight stem, RHS/ Cemented Curved stem, RHS/ Tibial Augment: These devices are single use implant and intended for cemented use only.

    For Distal Femoral Component, RHS/ Proximal Tibial Component, RHS/ Tibial stem/ Segment Part, RHS/ Segment Part, RHS, Bridge: These devices are single use implant and intended for cementless use only.

    Device Description

    The subject PF+ Patella is a line extension of the U2 Total Knee System, and is compatible to the USTAR II System. The subject device, U2 Total Knee System–PF+ Patella; USTAR II System - PF+ Patella, is a Metal-Backed Patella, indicated for both cemented or cementless application. There are two variations available: (1) Patella, Onset, E-XPE, PF+, and (2) Patella, Asymmetric Onset, E-XPE, PF+. Patella, Onset, E-XPE, PF+ is a symmetric, dome-type metal-backed patella, and Patella, Asymmetric Onset, E-XPE, PF+ is an asymmetric, anatomic-type patella. Each type is available in five sizes. The body of PF+ patella is manufactured from Vitamin E blended highly cross-linked UHMWPE (ASTM F2695, ASTM F648/ISO5834-1), while the part of the metal back and the three pegs are produced by additive manufacturing according to the FDA guidance "Technical Considerations for Additive Manufactured Medical Devices - Guidance for Industry and Food and Drug Administration Staff", "Guidance Document for Testing Orthopedic Implants with Modified Metallic Surfaces Apposing Bone or Bone Cement", and "Guidance for Industry on the Testing of Metallic Plasma Sprayed Coatings on Orthopedic Implants to Support Reconsideration of Post market Surveillance Requirements." The metal back is made of Ti-6Al-4V alloy (ASTM 2924) and has a porous Ti structure on the bone side, peg side, and poly side. All types of PF+ Patella are compatibility with "United" U2 Total Knee System-Femoral components (K051640, K120507, K140073, K140075, K150829, and K150832), Femoral component, PSA (K082424), Femoral components, PF+ (K221705), and USTAR II System-Femoral components (K190100).

    AI/ML Overview

    The provided text is a 510(k) Clearance Letter from the FDA for a total knee system. It details the device's name, regulation, a summary of its description, intended use, and a comparison to predicate devices, along with a list of non-clinical tests conducted.

    However, the document specifically states "No clinical data is necessary." This means that the clearance was not based on a clinical study demonstrating the device's performance against detailed acceptance criteria in human patients with the format typically requested in your prompt (e.g., sensitivity, specificity, human-in-the-loop performance, ground truth establishment by experts, etc.).

    Instead, the clearance is based on the substantial equivalence of the new device to existing legally marketed predicate devices, primarily through non-clinical testing and technological comparison.

    Therefore, I cannot fulfill your request for a table of acceptance criteria and reported device performance from a clinical study, as no such study was presented or required for this 510(k) clearance.

    The "acceptance criteria" for this device, as implied by the FDA clearance, revolve around demonstrating that its technological characteristics and non-clinical performance are substantially equivalent to already cleared devices.

    Here's what I can extract from the document regarding the non-clinical tests that functionally served as part of the "proof" that the device meets some form of performance criteria:

    Summary of Non-Clinical Tests (Implicit Acceptance Criteria & Performance):

    Test ConductedPurpose (Implicit Acceptance Criteria)Reported Performance
    Pull-out testTo demonstrate adequate mechanical fixation strength, particularly for the patella's pegs and porous coating intended for cementless or cemented application. The implicit acceptance criterion would be that the pull-out strength meets or exceeds established industry standards or predicate device performance for similar implants, ensuring secure attachment in the bone.(Details of results not provided in the 510(k) letter, but implied to be acceptable to FDA.)
    Characterization of Ti porous coatingTo ensure the porous Ti structure meets specifications for biocompatibility, porosity, and surface characteristics conducive to bone ingrowth and secure fixation. Acceptance criteria would involve adherence to specified material standards (e.g., ASTM 2924 for Ti-6Al-4V alloy) and potentially specific measurements of pore size, interconnectivity, and coating thickness, as referenced by the FDA guidance documents listed.(Details of results not provided, but implied to be acceptable to FDA.)
    Durability testTo assess the long-term mechanical integrity and resistance to wear and fatigue of the patella components (e.g., UHMWPE and metal back) under simulated physiological loading conditions. The acceptance criterion would be that the device maintains its structural integrity and functional performance over a clinically relevant lifespan, comparable to or exceeding predicate devices.(Details of results not provided, but implied to be acceptable to FDA.)
    Usability evaluationTo evaluate the ease of use, safety, and effectiveness of the device's design, particularly for the surgical implantation process. This might involve simulated use by surgeons or assessment of design features that minimize surgical errors. The acceptance criterion would be that the device can be safely and effectively implanted without undue difficulty or risk.(Details of results not provided, but implied to be acceptable to FDA.)
    Endotoxin testingTo ensure the device is free from harmful levels of bacterial endotoxins, which can cause adverse patient reactions if present. The acceptance criterion is typically a low or undetectable level of endotoxins, meeting pharmacopeial standards for medical devices.(Details of results not provided, but implied to be acceptable to FDA.)

    Since no clinical study was conducted or referenced in this 510(k) clearance documentation, the following points of your request cannot be addressed from the provided text:

    • Sample size used for the test set and data provenance: Not applicable, as no clinical test set was used. The non-clinical tests were performed on device prototypes or samples.
    • Number of experts used to establish the ground truth... / qualifications of those experts: Not applicable. Ground truth for clinical performance was not established.
    • Adjudication method for the test set: Not applicable.
    • If a multi-reader multi-case (MRMC) comparative effectiveness study was done...: Not applicable.
    • If a standalone (i.e., algorithm only without human-in-the-loop performance) was done: Not applicable, as this is a physical medical device, not an AI algorithm.
    • The type of ground truth used: For the non-clinical tests, the "ground truth" is defined by established engineering and material science standards and methodologies (e.g., ASTM standards for material properties, mechanical testing protocols).
    • The sample size for the training set: Not applicable. This is a physical device, not an AI model requiring a training set.
    • How the ground truth for the training set was established: Not applicable.

    In essence, this 510(k) clearance is a regulatory determination of substantial equivalence based on non-clinical performance data and technological comparisons to predicate devices, not on a clinical trial demonstrating performance against specific diagnostic or treatment outcome acceptance criteria in humans.

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    K Number
    K243024
    Date Cleared
    2024-12-20

    (84 days)

    Product Code
    Regulation Number
    888.3560
    Why did this record match?
    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use

    This product is indicated for temporary use (maximum of 180 days) as a total knee replacement (TKR) in skeletally mature patients undergoing a two-stage procedure due to a septic process.

    This product is not intended for use for more than 180 days, at which time it must be explanted and a permanent device implanted or another appropriate treatment performed (e.g., resection arthroplasty, fusion, etc.). During the implantation period, patients have to use traditional mobility assist devices (e.g. crutches, walkers, canes) for daily activities.
    With pre-clinical validations of antibiotic elution, tibial spacer fatigue test, and knee spacer wear test, only Palacos MV+G bone cement may be used for preparing the spacers.

    Device Description

    Cellbrick Knee Spacer is a temporary knee spacer product, it's suitable for the patients with mature skeleton and required to perform two-stage knee joint prosthesis procedure for infection control. It consists of three components, which are (1) Femoral Spacer, (2) Tibial Spacer, and (3) Canal Rod. The Femoral Spacers and the Tibial Spacers are designed with multiaperture features, which can act as carrier of antibiotic-loaded bone cement to release antibiotic at infection site. The Canal Rod is optional.

    • Femoral Spacer
      The Femoral Spacer is made of UHMWPE (ASTM F648/ISO5834-2). The geometrical appearance of Femoral Spacer is designed and modified based on the 510(k) cleared cruciate-retaining femoral component (K140073). Their articular surface geometry and curvature is identical. In addition, the Femoral Spacer is designed with multiaperture feature. Such scaffold-like features can use as a carrier of antibiotic-loaded cement to release antibiotic at the infection site for infection control.
      The Femoral Spacer can be used for both of left and right knee because of the symmetric condyle design. Five femoral spacer sizes have been prepared for different anatomical demands with anteroposterior (AP) and mediolateral (ML) dimensions. The Femoral Spacer is designed “same/ one up" sizing options with the tibial spacers.
    • Tibial Spacer
      The Tibial Spacer is made of UHMWPE (ASTM F648/ISO5834-2). The bearing surface's curvature and geometrical design of the tibial spacer is the same as the 510(k) cleared ultra-congruent tibial insert (K132752, K150829, and K222700). The Tibial Spacer is designed with multiaperture feature as well. This scaffold-like feature is used as a carrier of antibiotic-loaded cement to release antibiotic at the infection site for infection control.
      Five Tibial Spacer sizes have been prepared for different anatomical demands with anteroposterior (AP) and mediolateral (ML) dimensions.
    • Canal Rod
      The canal rod is made of Ti-6Al-4V alloy (ASTM F136/ISO 5832-3). As a carrier, the rod provides the area for cement to attach so that to increase the surface area of cement. The canal rod is an optional device, it could be applied to patient with deeper infection problem, applying Canal Rod can make surgeon placing antibiotic-loaded cement into the deeper infection site. The Canal Rod is provided with one dimension: Ø 4(diameter) ×80mm (length).
    AI/ML Overview

    The provided text is a 510(k) summary for the "Cellbrick Knee Spacer". It describes the device, its intended use, and compares it to predicate devices. However, the document does not contain any information about acceptance criteria or a study proving that an AI/ML device meets acceptance criteria.

    The requested information (acceptance criteria table, sample sizes, expert qualifications, adjudication methods, MRMC studies, standalone performance, ground truth types, training set details) is all highly relevant to the evaluation of AI/ML-driven medical devices. Since the Cellbrick Knee Spacer is described as a physical implant (femoral spacer, tibial spacer, canal rod made of UHMWPE and Ti-6Al-4V alloy) and not a software or AI/ML product, the submission details focus on pre-clinical validations for physical properties like antibiotic elution, wear tests, fatigue tests, range of motion, constraint performance, and endotoxin testing.

    Therefore, I cannot provide the requested information as it is not present in the provided document. The document describes a physical medical device clearance, not an AI/ML device validation.

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    K Number
    K221705
    Date Cleared
    2023-02-28

    (260 days)

    Product Code
    Regulation Number
    888.3565
    Why did this record match?
    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use

    U2 Total Knee System - PF+ is indicated in knee arthroplasty for reduction or relief of pain and/or improved knee function in skeletally mature patients with severe knee pain and disability due to rheumatoid arthritis, primary and secondary traumatic arthritis, collagen disorders, avascular necrosis of the femoral condyle or pseudogout, posttraumatic loss of joint configuration, particularly when there is patellofemoral joint surface erosion, dysfunction or prior patellectomy, moderate valgus, varus, or flexion deformities. This device may also be indicated in the salvage or previously failed surgical attempts or for knee in which satisfactory stability in flexion cannot be obtained at the time of surgery. Femoral Component, PF+, Tibial Baseplate, PF+ and Tibial Extension Stem are indicated for both cemented and cementless use.

    Device Description

    There are three components included in U2 Total Knee System- PF+ for this 510k, (1)Femoral Component, PF+, (2)Tibial Baseplate, PF+, and (3)Tibial Extension Stem. Both Femoral Component, PF+ and Tibial Baseplate, PF+ can collocate with U2 Total Knee System tibial insert and patellar component (K021657, K051640, K082469, K103733, K131864, K132752, K150829, K152430, K161705, and K210961). This system includes Cruciate Retained (CR) type and Posterior Stabilized (PS) type.

    • Femoral Component, PF+
    There are two types of Femoral Component, PF+ : Cruciate Retaining type and Posterior Stabilized type. Femoral Component, PF+ is manufactured from cast Co-Cr-Mo alloy conforming to ASTM F75. The inner surface is coated with Co-Cr-Mo beads and Co-Cr-Mo powder (ASTM F75) to provide a porous surface to achieve biological fixation.

    • Tibial Baseplate, PF+
    Tibial Baseplate, PF+ is manufactured from titanium alloy (ASTM F620) which is forged by titanium alloy bars (ASTM F136). The backside of the subject device is coated with Titanium powder (ASTM F1580).

    • Tibial Extension Stem
    Tibial Extension Stem is collocated with tibial baseplate. The subject device is made of titanium alloy conforming to ASTM F136.

    AI/ML Overview

    The provided document (K221705) is a 510(k) summary for a medical device called the "U2 Total Knee System-PF+". This document is a premarket notification to the FDA to demonstrate that the device is substantially equivalent to legally marketed predicate devices.

    It is crucial to understand that this document describes a mechanical orthopedic implant (knee replacement components), not an AI-powered or software-based medical device. Therefore, the concepts of acceptance criteria for AI performance, training and test sets for AI models, expert ground truth for imaging, MRMC studies, or standalone algorithm performance are not applicable to this submission.

    The document discusses acceptance criteria and proof of meeting them, but these relate to the mechanical and material properties, biocompatibility, and sterilization of the knee implant components, not to the performance of an AI algorithm.

    Therefore, I cannot provide the requested information for an AI-powered device based on this document.

    However, I can extract information relevant to the device's performance, which is related to its mechanical and material integrity:


    Information from the document relevant to the device's "performance" (mechanical/material):

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

    The document broadly states that "the test results indicated that this device is safe and effective" and that "Verification activities on Subject devices demonstrated equivalent safety and effectiveness as compared to the predicate devices."

    Specific acceptance criteria (e.g., "fatigue strength must exceed X N at Y cycles") and the exact reported values are not explicitly provided in a table format within this 510(k) summary. The summary typically refers to the fact that these tests were conducted and met the necessary standards for substantial equivalence.

    However, the types of performance tests conducted are listed:

    Test ConductedPerformance Indication (Implicit)
    Femoral component fatigue testDevice meets fatigue life requirements for load-bearing in the knee
    Tibial baseplate fatigue testDevice meets fatigue life requirements for load-bearing in the knee
    Articulating surface finish of femoral componentSurface smoothness is adequate for proper articulation and wear resistance
    Finish of non-articulating surface of tibial baseplateSurface quality is appropriate for non-articulating areas (e.g., tissue contact, fixation)
    Microstructure of the modified surfaceMaterial structure is as intended, contributing to mechanical properties and biological fixation
    Mechanical properties of the modified surfaceMaterial strength, stiffness, etc., are consistent with design and predicate devices
    Bacteria endotoxin testingEndotoxin levels are below specified limits (met USP ) ensuring biocompatibility and safety for implantation

    2. Sample sized used for the test set and the data provenance:

    • Sample Size: Not explicitly stated for each mechanical test. For mechanical testing of components, samples typically refer to a number of physical units or prototypes tested, not patient data.
    • Data Provenance: The tests are performed by the manufacturer, United Orthopedic Corporation (located in Hsinchu City, Taiwan). The testing is primarily laboratory-based mechanical and material characterization, not clinical data. Therefore, concepts like "country of origin of the data" or "retrospective/prospective" in the clinical sense are not applicable.

    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 question is not applicable. This device is a mechanical implant, not an AI system interpreting medical images. "Ground truth" in this context would be defined by engineering specifications, material standards (e.g., ASTM F75, F136, F620, F1580), and validated test methodologies (e.g., fatigue testing standards). The "experts" involved would be materials scientists, mechanical engineers, and quality assurance professionals, whose qualifications are implicit in the adherence to recognized standards.

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

    This question is not applicable. Mechanical tests have specific physical or chemical endpoints determined by validated methods and equipment, not human subjective interpretation requiring adjudication.

    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:

    This question is not applicable. MRMC studies are for assessing diagnostic accuracy of imaging or AI systems with human readers. This device is a mechanical implant.

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

    This question is not applicable. This device is a mechanical implant.

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

    The "ground truth" for this device's performance is established by:

    • Adherence to international and national standards for materials (e.g., ASTM F75, F136, F620, F1580).
    • Validated mechanical testing methodologies (e.g., fatigue testing, surface finish measurements).
    • Biocompatibility standards (e.g., USP for endotoxin).
    • Comparison to the established performance characteristics of predicate devices.

    8. The sample size for the training set:

    This question is not applicable. There is no AI model or "training set" for this mechanical device.

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

    This question is not applicable.

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    K Number
    K222700
    Date Cleared
    2022-10-06

    (29 days)

    Product Code
    Regulation Number
    888.3560
    Reference & Predicate Devices
    Why did this record match?
    Reference Devices :

    K131864, K051640, K150829, K103733, K132752, K161705

    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use

    For Tibial baseplate, CMA, #0
    This device is indicated in knee arthroplasty for reduction or relief of pain and/or improved knee function in sketetally mature patients with severe knee pain and disability due to rheumatoid arthritis, primary and secondary traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral condyle or pseudogout, posttraumatic loss of joint configuration, particularly when there is patellofemoral joint surfaction or prior patellectorny, moderate valgus, varus, or flexion contraction. This device may also be indicated in the salvage or previously failed surgical attempts or for knee in which satisfactory stability in flexion cannot be obtained at the time of surgery. This device system is designed for cemented use only.

    For Tibial insert, #0
    The device is indicated in knee arthroplasty for reduction or relief of pain and/or improved knee function in sketally mature patients with severe knee pain and disability due to rheumatoid arthritis, primary and secondary traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral condyle or pseudogout, posttraumatic loss of joint configuration, particularly when there is patellofemoral erosion, dysfunction or prior patellectomy, moderate valgus, varus, or flexion deformities. This device may also be indicated in the salvage of previously failed surgical attempts if the knee can be satisfactorily balanced and stabilized at the time of surgery. This device is a single use implant and intended for cemented use only.

    Device Description

    The U2 Total Knee System consists of Femoral components, patella components, Tibial baseplate components and Tibial inserts components which are designed to be used together to achieve total replacement of the knee joint. This system includes Cruciate Retained (CR) type, Ultracongruent (UC) type, and Posterior Stabilized (PS) type.

    The U2 Total Knee System, Tibial baseplate, CMA, #0 (Subject device) is a size extension of the cleared "UNITED" U2 Total Knee System, Tibial baseplate, CMA, #1 to #7 (K131864). The materials, indications, sterilization of this subject are identical to the cleared "UNITED" U2 Total Knee System, Tibial baseplate, CMA, #1 to #7 (K131864).

    The U2 Total Knee System, Tibial insert, #0 (Subject device) is a size extension of the cleared "UNITED" U2 Total Knee System, Tibial insert, #1 to #7 (K051640, K103733, K131864, K132752, K150829 and K161705). The materials, indications, sterilization of this subject are identical to the cleared "UNITED" U2 Total Knee System, Tibial insert, #1 to #7 (K051640, K103733, K131864, K132752, K150829 and K161705). The Subject Tibial insert, CR, #0 and Tibial insert, PS, #0 have a more concave sagittal plane design while comparing to the marketed predicate devices

    Surgical procedures with the use of the Subject device shall be performed with the support of orthopedic instrumentation, to facilitate their proper insertion and removal from the patient. All the surgical instruments have been cleared as part of the predicate devices.

    AI/ML Overview

    This is a medical device clearance, not an AI/ML device. Therefore, the questions regarding AI/ML device evaluations (sample size, experts, adjudication, MRMC, standalone performance, ground truth establishment for training set, etc.) are not applicable.

    The document describes the acceptance criteria and study for a Tibial baseplate and Tibial insert, which are components of a knee replacement system. This is a traditional medical device, not an AI/ML powered device. Therefore, the concepts related to AI/ML device performance such as ground truth, expert adjudication, train/test sets, effect size of AI assistance, etc., are not relevant to this document.

    However, I can extract the information provided regarding the device's performance analysis and acceptance criteria, based on the non-clinical tests conducted.

    Here's the summary of the acceptance criteria and the study that proves the device meets them, based on the provided text:

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

    The document does not explicitly list 'acceptance criteria' with numerical targets and then 'reported device performance' side-by-side in a table format. Instead, it states that "the following non-clinical tests were conducted to evaluate the safety and effectiveness of the subjected device, and the test results indicated that this device is safe and effective." This implies that the device met the internal acceptance criteria for each test.

    Acceptance Criteria Category (Implied)Reported Device Performance (Implied by Conclusion)
    Range of MotionMet Safety and Effectiveness requirements
    Locking Strength of Tibial baseplate and InsertMet Safety and Effectiveness requirements
    Contact Area and Contact PressureMet Safety and Effectiveness requirements
    Wear Simulation TestMet Safety and Effectiveness requirements
    Fatigue Test of Tibial baseplateMet Safety and Effectiveness requirements
    Spine Fatigue Test of Tibial insertMet Safety and Effectiveness requirements

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

    The document does not specify the sample sizes (number of devices tested) for the non-clinical tests. It also does not provide information about data provenance as these are laboratory-based mechanical tests, not clinical data sets.

    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)

    Not applicable. This is a mechanical device, not an AI/ML device requiring expert ground truth for image interpretation or diagnosis.

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

    Not applicable. This is a mechanical device. Adjudication methods are relevant for subjective interpretations, typically in clinical studies or AI/ML ground truth establishment.

    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 is a mechanical device, not an AI/ML device.

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

    Not applicable. This is a mechanical device, not an AI/ML device.

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

    Not applicable. For mechanical devices, "ground truth" is typically defined by engineering specifications, material properties, and mechanical test standards (e.g., ISO or ASTM standards) that define acceptable performance limits. The document states that the "non-clinical tests were conducted to evaluate the safety and effectiveness," implying adherence to established engineering and material science principles, but specific ground truth definition is not explicitly detailed in this summary.

    8. The sample size for the training set

    Not applicable. This is a mechanical device, not an AI/ML device that requires a training set.

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

    Not applicable. This is a mechanical device, not an AI/ML device.

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    K Number
    K161705
    Date Cleared
    2017-03-16

    (269 days)

    Product Code
    Regulation Number
    888.3560
    Why did this record match?
    Reference Devices :

    K082424, K103733, K131864, K132752, K150829

    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use

    For E-XPE Insert (CR, PS and UC type) and Patella:
    The device is indicated in knee arthroplasty for reduction or relief of pain and/or improved knee function in skeletally mature patients with severe knee pain and disability due to rheumatoid arthritis, osteoarthritis, primary and secondary traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral condyle or pseudogout, posttraumatic loss of joint configuration, particularly when there is patellofemoral erosion, dysfunction or prior patellectomy, moderate valgus, varus, or flexion deformities. This device may also be indicated in the salvage of previously failed surgical attempts if the knee can be satisfactorily balanced and stabilized at the time of surgery. This device is a single use implant and intended for cemented use only.

    For E-XPE Insert (PSA type)
    This device is indicated in knee arthroplasty for reduction or relief of pain and/or improved knee function in skeletally mature patients with severe knee pain and disability due to rheumatoid arthritis, osteoarthritis, primary and secondary traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral condyle or pseudogout, posttraumatic loss of joint configuration, particularly when there is patellofemoral erosion, dysfunction or prior patellectomy, moderate valgus, varus, or flexion contraction. This device is intended for use in patients who require augmentation and/or stem extensions due to inadequate bone stock and/or require constrained stabilization for tibiofemoral joint due to soft tissue imbalance. This device is a single use implant and intended for cemented use only.

    Device Description

    The subjected device includes E-XPE Tibial insert (CR, PS, UC and PSA type) and E-XPE Patella. It is an extension to the previously cleared "UNITED" U2 Total Knee System (K082424, K103733, K131864, K132752 and K150829). The design rationale and indication for use are identical to the previously cleared "UNITED" U2 Total Knee System.

    AI/ML Overview

    The provided document is a 510(k) summary for the U2 Total Knee System E-XPE Products. It focuses on demonstrating substantial equivalence to pre-existing predicate devices for a medical device, specifically a knee implant. As such, it details pre-clinical performance data (mechanical tests) and explicitly states "None provided" for clinical performance data.

    Therefore, it does not contain the information required to answer the prompt, which is about acceptance criteria and study results for an AI/algorithm-based medical device. The prompt is looking for details about an AI's performance, such as:

    • Accuracy/performance metrics (e.g., sensitivity, specificity, AUC)
    • Sample sizes for test and training sets related to image or data analysis
    • Ground truth establishment by expert readers or pathologists
    • Human-in-the-loop studies (MRMC studies)
    • Adjudication methods for AI performance validation

    None of this type of information is present in the provided text, as it describes a physical implant and its material/mechanical testing.

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    K Number
    K152430
    Date Cleared
    2016-04-12

    (230 days)

    Product Code
    Regulation Number
    888.3560
    Why did this record match?
    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use

    The device is indicated for use in total knee arthroplasty in skeletally mature patients with the following conditions:

    1. Rheumatoid arthritis, osteoarthritis, traumatic arthritis, polyarthritis.
    2. Collagen disorders, and/or avascular necrosis of the femoral condyle.
    3. Post-traumatic loss of joint configuration, particularly when there is patellofemoral erosion, dysfunction or prior patellectomy.
    4. Moderate valgus, varus, or flexion deformities.
    5. The salvage of previously failed surgical attempts or for a knee in which satisfactory stability in flexion cannot be obtained at the time of surgery.

    The device includes Cruciate Retained (CR) type, Posterior Stabilized (PS) type and Ultracongruent (UC) type. CR and UC types are designed to collocate with CR femoral component, while PS type is designed to collocate with PS femoral component.

    This device is a single use implant and intended for cemented use only.

    Device Description

    All Poly Tibial Components are made of Ultra High Molecular Weight Polyethylene (UHMWPE), including Cruciate Retained (CR) type, Posterior Stabilized (PS) type and Ultracruent (UC) type. All types are available in sizes #0~#7 (ranging from 39.5mm/60mm AP/ML to 58mm/84mm AP/ML) with ten thickness options (9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm and 18mm). The CR type of All Poly Tibial Component is intended to accommodate the posterior cruciate ligament (PCL) if it is present. The PS type and UC type are intended to be used in situation where the posterior cruciate ligament is absent or cannot be preserved. All Poly Tibial Components can be used with femoral components of U2 Total Knee System and patella (K021657, K103733, K051640 and K082469) in primary or revision total knee arthroplasty. CR and UC types are designed to collocate with CR femoral component (K140073, K150829, K140075 and K150832) while PS type is designed to collocate with PS femoral component (K051640, K120507 and K150829). The X-ray marking wire which is made of Co-20Cr-15W-10Ni alloy is embedded in the All Poly Tibial Component for X-ray image identification purpose.

    AI/ML Overview

    I am sorry, but based on the provided text, there is no information about acceptance criteria, reported device performance, sample sizes, data provenance, expert qualifications, adjudication methods, multi-reader multi-case studies, standalone algorithm performance, or ground truth establishment for a device that uses AI or machine learning.

    The document describes a medical device called "All Poly Tibial Component," which is a knee implant. The "Performance Data" section explicitly states "Non-clinical Performance" and lists mechanical tests like Range of Motion, Contact Area and Contact Pressure, Constraint Test, Wear Simulation Test, and Fatigue Test. It also explicitly states "Clinical Performance Data/Information: None provided as a basis for substantial equivalence."

    Therefore, I cannot provide the requested information.

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