(304 days)
The Advanced LumFix Spinal Fixation System is intended for posterior, noncervical pedicle fixation as an adjunct to fusion in skeletally mature patients using autograft and/or allograft for the following indications: degenerative disc disease (DDD) (defined as back pain of discogenic origin with degeneration of the disc confirmed by history and radiographic studies); spondylolisthesis; trauma (i.e., fracture or dislocation); spinal stenosis; curvatures (i.e., scoliosis, kyphosis, and/or lordosis); tumor; pseudoarthrosis; and failed previous fusion.
The Advanced Lumfix Spinal Fixation System is a top-loading multiple component, posterior spinal fixation system which consists of pedicle screws, set screws, rod connectors and a crosslink linking mechanism. The Advanced Lumfix Spinal Fixation System will allow surgeons to build a spinal implant construct to stabilize and promote spinal fusion. Advanced Lumfix Spinal Fixation System components are supplied non-sterile are single use and are fabricated from titanium alloy (Ti-6A1-4V ELI) that conforming to ISO 5832-3 or ASTM F136, with a cobalt-chromium-molybdenum rod option conforming to ASTM F1537 (Co-28Cr-6Mo). Various sizes of these implants are available.
I am sorry, but the provided text does not contain any information about acceptance criteria for a device's performance, nor does it describe a study proving a device meets such criteria.
The document is an FDA 510(k) clearance letter for the "Advanced LumFix Spinal Fixation System." It primarily addresses the device's substantial equivalence to previously marketed predicate devices, its indications for use, and general regulatory compliance.
Specifically, the document mentions:
- Device Name: Advanced LumFix Spinal Fixation System
- Regulation Number: 21 CFR 888.3070 (Thoracolumbosacral Pedicle Screw System)
- Regulatory Class: Class II
- Indications for Use: Posterior, noncervical pedicle fixation as an adjunct to fusion for various spinal conditions (degenerative disc disease, spondylolisthesis, trauma, spinal stenosis, curvatures, tumor, pseudoarthrosis, failed previous fusion).
- Material: Titanium alloy (Ti-6A1-4V ELI) with a cobalt-chromium-molybdenum rod option.
- Non-clinical testing: Mechanical testing was performed in accordance with ASTM F1798 and ASTM F1717-11/18/21 (Static and Dynamic tests). This testing was to demonstrate equivalence to predicate devices, not to meet specific performance thresholds for a new function or AI component.
- Conclusion: The device is substantially equivalent in design, materials, indications, and performance to predicate devices.
There is no mention of:
- A table of acceptance criteria and reported device performance metrics (e.g., accuracy, sensitivity, specificity).
- Sample sizes for test or training sets for an AI/algorithm study.
- Data provenance.
- Number or qualifications of experts used for ground truth.
- Adjudication methods.
- MRMC studies, human reader improvement, or effect sizes.
- Stand-alone algorithm performance.
- Type of ground truth used (e.g., pathology, outcomes data).
- How ground truth was established for training data.
Therefore, I cannot fulfill your request to describe the acceptance criteria and the study proving the device meets them based on the provided text. The device described is a physical spinal fixation system, not an AI or software device that would typically have performance metrics and studies as you've outlined.
§ 888.3070 Thoracolumbosacral pedicle screw system.
(a)
Identification. (1) Rigid pedicle screw systems are comprised of multiple components, made from a variety of materials that allow the surgeon to build an implant system to fit the patient's anatomical and physiological requirements. Such a spinal implant assembly consists of a combination of screws, longitudinal members (e.g., plates, rods including dual diameter rods, plate/rod combinations), transverse or cross connectors, and interconnection mechanisms (e.g., rod-to-rod connectors, offset connectors).(2) Semi-rigid systems are defined as systems that contain one or more of the following features (including but not limited to): Non-uniform longitudinal elements, or features that allow more motion or flexibility compared to rigid systems.
(b)
Classification. (1) Class II (special controls), when intended to provide immobilization and stabilization of spinal segments in skeletally mature patients as an adjunct to fusion in the treatment of the following acute and chronic instabilities or deformities of the thoracic, lumbar, and sacral spine: severe spondylolisthesis (grades 3 and 4) of the L5-S1 vertebra; degenerative spondylolisthesis with objective evidence of neurologic impairment; fracture; dislocation; scoliosis; kyphosis; spinal tumor; and failed previous fusion (pseudarthrosis). These pedicle screw spinal systems must comply with the following special controls:(i) Compliance with material standards;
(ii) Compliance with mechanical testing standards;
(iii) Compliance with biocompatibility standards; and
(iv) Labeling that contains these two statements in addition to other appropriate labeling information:
“Warning: The safety and effectiveness of pedicle screw spinal systems have been established only for spinal conditions with significant mechanical instability or deformity requiring fusion with instrumentation. These conditions are significant mechanical instability or deformity of the thoracic, lumbar, and sacral spine secondary to severe spondylolisthesis (grades 3 and 4) of the L5-S1 vertebra, degenerative spondylolisthesis with objective evidence of neurologic impairment, fracture, dislocation, scoliosis, kyphosis, spinal tumor, and failed previous fusion (pseudarthrosis). The safety and effectiveness of these devices for any other conditions are unknown.”
“Precaution: The implantation of pedicle screw spinal systems should be performed only by experienced spinal surgeons with specific training in the use of this pedicle screw spinal system because this is a technically demanding procedure presenting a risk of serious injury to the patient.”
(2) Class II (special controls), when a rigid pedicle screw system is intended to provide immobilization and stabilization of spinal segments in the thoracic, lumbar, and sacral spine as an adjunct to fusion in the treatment of degenerative disc disease and spondylolisthesis other than either severe spondylolisthesis (grades 3 and 4) at L5-S1 or degenerative spondylolisthesis with objective evidence of neurologic impairment. These pedicle screw systems must comply with the following special controls:
(i) The design characteristics of the device, including engineering schematics, must ensure that the geometry and material composition are consistent with the intended use.
(ii) Non-clinical performance testing must demonstrate the mechanical function and durability of the implant.
(iii) Device components must be demonstrated to be biocompatible.
(iv) Validation testing must demonstrate the cleanliness and sterility of, or the ability to clean and sterilize, the device components and device-specific instruments.
(v) Labeling must include the following:
(A) A clear description of the technological features of the device including identification of device materials and the principles of device operation;
(B) Intended use and indications for use, including levels of fixation;
(C) Identification of magnetic resonance (MR) compatibility status;
(D) Cleaning and sterilization instructions for devices and instruments that are provided non-sterile to the end user; and
(E) Detailed instructions of each surgical step, including device removal.
(3) Class II (special controls), when a semi-rigid system is intended to provide immobilization and stabilization of spinal segments in the thoracic, lumbar, and sacral spine as an adjunct to fusion for any indication. In addition to complying with the special controls in paragraphs (b)(2)(i) through (v) of this section, these pedicle screw systems must comply with the following special controls:
(i) Demonstration that clinical performance characteristics of the device support the intended use of the product, including assessment of fusion compared to a clinically acceptable fusion rate.
(ii) Semi-rigid systems marketed prior to the effective date of this reclassification must submit an amendment to their previously cleared premarket notification (510(k)) demonstrating compliance with the special controls in paragraphs (b)(2)(i) through (v) and paragraph (b)(3)(i) of this section.