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The PediFlex™ Flexible Nail System is intended for fixation of diaphyseal fractures of long bones where the medullary canal is narrow or flexibility of the implant is required. This includes upper extremity fractures in all patients and lower extremity fractures in pediatric or small stature patients. In pediatric patients, the flexibility of the nail allows it to be inserted at a point that does not disturb or disrupt the growth plate.

Line extension includes 1.5 and 4.5 mm diameters in 300mm and 450 mm lengths, respectively, which can be cut to length intra-operatively. The PediFlex has a curved, tapered tip to facilitate insertion. This is a single use device intended for temporary implantation. It is intended to be removed once the bone has healed. Note: the two diameters shown in bold are line extensions to our (Titanium) PediFlex system cleared though K081097, which is currently available in 2.0, 2.5, 3.0, 3.5, and 4.0mm diameters. The device is the same as flexible pins and ender nails that have been used to fix fractures in long bones for years in an intramedullary fashion. When these types of nails are used, they will be used in opposing pairs. The nail will be bent to provide three-point fixation. The ideal fixation points will be at the insertion site, the fracture site, and some point beyond the fracture site. Materials: The devices are manufactured from Ti-6Al-4V which meets the ASTM-F136 standard, and 316L stainless steel which meets the ASTM-F138 standard. Function: The system functions to provide immediate stability and temporary fixation during the natural healing process.

The provided text describes a medical device, the OrthoPediatrics PediFlex™ Flexible Nail System, and its substantial equivalence to predicate devices, but it does not contain information about acceptance criteria or a study that proves the device meets specific performance criteria.

The document is a 510(k) premarket notification approval letter from the FDA. In 510(k) submissions, manufacturers demonstrate that their new device is "substantially equivalent" to a legally marketed predicate device. This often involves showing similar design, materials, and intended use, and may include performance testing to ensure the new device performs as safely and effectively as the predicate. However, detailed acceptance criteria and a specific study report proving the device meets those criteria are not present in the provided text.

Based on the information provided, here's what can be extracted:

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

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

• Sample size for test set: Not mentioned.
• Data provenance: Not mentioned.

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 mentioned. This type of information is typically associated with studies involving expert review of data, which is not described here.

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

• Not mentioned.

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 is mentioned. This device is a physical implant, not an AI-assisted diagnostic tool.

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

• Not applicable. This is a physical medical device (intramedullary nail), not an algorithm or software.

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

• Not applicable in the context of this document. For physical devices demonstrating substantial equivalence, "ground truth" often relates to adherence to material standards, functional testing, and clinical outcomes of predicate devices, which are not detailed here. The submission relies on established safety and effectiveness of similar devices.

8. The sample size for the training set

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

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

• Not applicable. This device is not an AI/ML algorithm.

Summary of what the document does provide:

• Device Name: OrthoPediatrics PediFlex™ Flexible Nail System
• Manufacturer: OrthoPediatrics, Corp.
• Device Type: Intramedullary Elastic Nail (line extension including 1.5mm and 4.5mm diameters in 300mm and 450mm lengths).
• Materials: Ti-6Al-4V (ASTM-F136) and 316L stainless steel (ASTM-F138).
• Function: Provides immediate stability and temporary fixation for long bone fractures.
• Indications for Use: Fixation of diaphyseal fractures of long bones where the medullary canal is narrow or flexibility is required, including upper extremity fractures in all patients and lower extremity fractures in pediatric or small stature patients (designed not to disturb growth plates in pediatric patients).
• Basis for Substantial Equivalence: Similarities in design, materials, and indications to several predicate devices (listed in the text).
• FDA Approval: Cleared with 510(k) Number K082375 on October 17, 2008.

The document essentially states that the new PediFlex line extension is substantially equivalent to existing, legally marketed devices, implying that its performance is acceptable based on the history and regulatory clearance of those predicates. It does not elaborate on new performance studies with specific acceptance criteria beyond material and general functional descriptions.

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The PediFlex (Flexible) Nail System is intended for fixation of diaphyseal fractures of long bones where the medullary canal is narrow or flexibility of the implant is required. This includes upper extremity fractures in all patients and lower extremity fractures in pediatric or small stature patients. In pediatric patients, the flexibility of the nail allows it to be inserted at a point that does not disturb or disrupt the growth plate.

The nail is available in 2.0, 2.5, 3.0, 3.5, and 4.0 mm diameters, each 440 mm long, which can be cut to length intra-operatively. The PediFlex has a curved, tapered tip to facilitate insertion. This is a single use device intended for temporary implantation. It is intended to be removed once the bone has healed.
Materials: The devices are manufactured from Ti-6Al-4V which meets ASTM F136, and ISO-5832 standards.
Function: The system functions to provide immediate stability and temporary fixation during the natural healing process.

The provided text does not contain information regarding acceptance criteria or the study that proves the device meets specific acceptance criteria in the context of a performance study like an AI/ML device.

This document describes a 510(k) premarket notification for a medical device called the OrthoPediatrics PediFlex™ Flexible Nail System, which is an intramedullary elastic nail. The focus of this submission is to demonstrate substantial equivalence to existing legally marketed predicate devices, rather than presenting a performance study with defined acceptance criteria for a new clinical efficacy or diagnostic accuracy claim.

The "Basis for Substantial Equivalence" section explicitly states: "OrthoPediatrics believes that this system is substantially equivalent to the legally marketed predicate devices based on similarities in design, materials, and indications."

Therefore, I cannot provide the requested information, such as a table of acceptance criteria and reported device performance, sample sizes for test sets, expert qualifications, or details about MRMC studies or standalone algorithm performance. These types of studies are typically associated with devices that have a new clinical function or AI/ML components requiring validation against specific performance metrics, which is not the case for this 510(k) submission.

Ask a specific question about this device