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This submission does not change the indications for use for the StealthStation System.

The StealthStation® System is intended as an aid for precisely locating anatomical structures in either open or percutaneous procedures. The StealthStation® System is indicated for any medical condition in which the use of stereotactic surgery may be appropriate, and where reference to a rigid anatomical structure, such as the skull, a long bone, or vertebra, can be identified relative to a CT or MR based model, fluoroscopy images, or digitized landmarks of the anatomy.

For the optical-based and EM-based system, example procedures include, but are not limited to:

Cranial Procedures: Cranial Biopsies Tumor Resections Craniotomies/ Craniectomies Skull Base procedures Thalamotomies/Pallidotomies Pituitary Tumor Removal CSF Leak Repair Pediatric Catheter Shunt Placement General Catheter Shunt Placement

Orthopaedic Procedures: Total Knee Arthroplasty (Primary and Revision) Unicompartmental Knee Arthroplasty

Spinal Procedures: Spinal Implant Procedures, such as Pedicle Screw Placement

ENT Procedures: Transphenoidal Procedures Intranasal Procedures Orbital Nerve Decompression Procedures Optic Nerve Decompression Procedures Polyposis Procedures Endoscopic Dacryocystorhinostomy Encephalocele Procedures Sinus procedures, such as Maxillary Antrostomies. Ethmoidectornies, Sphenoidotomies/Sphenoid Explorations, Turbinate Resections, and Frontal Sinusotomies

Additional example procedures for the optical-based system include, but are not limited to:

Total Knee Arthroplasty (Primary and Revision) Unicompartmental Knee Arthroplasty Minimally Invasive Orthopaedic Procedures Pediatric Orthopaedics Total Hip Replacement (Primary and Revision) Periacetabular Osteotomies Tumor Resection and Bone/Joint Reconstruction Femoral Revision Placement of Iliosacral Screws Stabilization and Repair of Pelvic Fractures (Including but not limited to Acetabular Fractures)

This submission provides an update to the StealthStation® System, including a new computer hardware and operating system options, a passive-only optical digitizer option, new cranial reference frame and EM reference frame.

I am sorry, but the provided text from K050438, "Summary of Safety and Effectiveness StealthStation® System Update," does not contain the specific details about acceptance criteria, device performance, or human study methodologies that you've requested.

This document primarily focuses on:

• Device Identification: Naming the device, classification, and contact information.
• Device Modification: Describing the updates to the StealthStation® System (new computer hardware, operating system, digitizer options, and reference frames).
• Substantial Equivalence: Stating that the updated system was shown to be substantially equivalent to previously cleared versions and that verification and validation activities were performed.
• Indications for Use: Reiterating the established indications for use for the StealthStation System, which remain unchanged by this update, and listing various cranial, spinal, ENT, and orthopaedic procedures for which it is indicated.
• FDA Correspondence: The FDA's letter confirming the 510(k) clearance and substantial equivalence.

There is no information within this document about:

• A table of acceptance criteria and reported device performance.
• Sample sizes for test sets, data provenance, or the number/qualifications of experts.
• Adjudication methods.
• Multi-reader multi-case (MRMC) comparative effectiveness studies or effect sizes for human improvement with AI.
• Standalone algorithm performance studies.
• The type of ground truth used.
• Sample size for the training set or how its ground truth was established.

This document describes a regulatory submission for a device update, asserting substantial equivalence rather than presenting detailed performance study data against specific acceptance criteria.

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