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The VERTE-STACK™ Spinal System is a vertebral body replacement device intended for use in the thoracolumbar spine (T1-L5) to replace a collapsed, damaged, or unstable vertebral body due to tumor or trauma (i.e., fracture). The VERTE-STACK™ Spinal System is to be used with supplemental fixation. Specifically, the VERTE-STACK™ device is to be used with the Medtronic Sofamor Danek ZPLATE II Anterior Fixation System, the DYNALOK™ CLASSIC Spinal System, the VANTAGE™ Anterior Fixation System, the TSRH® Spinal System, the CD HORIZON® Spinal System, the GDLH® Spinal System and/or their successors. Additionally, the VERTE-STACK™ device is intended to be used with bone graft.

The VERTE-STACK™ device is a stackable spacer, which inserts between vertebral bodies in the anterior thoracic and lumbar spine. The device is intended for vertebral body replacement to aid in the surgical correction and stabilization of the spine. The construct is not intended to be employed as a stand-alone device. The VERTE-STACK™ device is fabricated and manufactured from POLYETHERETHERKETONE (PEEK OPTIMA LT) along with a tantalum marker. Alternatively the device may be manufactured from titanium alloy. The design of the VERTE-STACK™ device includes a variety of stackable components of different sizes and heights. The stackable components are designed to suit the individual patient pathology. The VERTE-STACK™ device may be used individually, or two or more may be stacked together in order to accommodate the individual anatomical requirements of the vertebral space created by the corpectomy. The VERTE-STACK™ Spinal System must be used with additional anterior and/or posterior spinal instrumentation to augment stability. VERTE-STACK™ constructs manufactured with PEEK may be used with stainless steel or titanium supplemental fixation devices. Titanium VERTF-STACK™ constructs may not be used with stainless steel supplemental fixation devices. The purpose of this submission is to include additional components to the previously cleared VERTE-STACK™ Spinal System.

The provided text is a 510(k) summary for the VERTE-STACK™ Spinal System. This document focuses on demonstrating substantial equivalence to previously cleared devices rather than presenting a study with acceptance criteria and device performance results as typically seen for AI/ML-based medical devices or diagnostics.

Therefore, the requested information regarding acceptance criteria, study design, sample sizes, expert involvement, and ground truth establishment is not available in the provided document. The 510(k) summary is a regulatory submission demonstrating that a new device is as safe and effective as an existing, legally marketed device (predicate device). It does not typically include detailed performance studies with acceptance criteria in the way a clinical trial or a study for a novel device would.

The document states:
"Documentation was provided which demonstrated the VERTE-STACK™ Spinal System to be substantially equivalent to the previously cleared VERTE-STACK™ Spinal System components found in K030736, K030735, K023570 and K021791."

This means the acceptance criteria and performance are implicitly met by virtue of being similar enough to established predicate devices that have already undergone regulatory scrutiny. No new clinical or performance studies are detailed in this summary.

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