The FRED X Flow Diverter Stent from Terumo Neuro (REF XFRED4012) is a self-expanding, dual-layer braided intracranial flow diverter in a 4.0 mm x 18 mm configuration. FRED X builds on the FRED platform by adding a covalently bonded surface modification designed to reduce material thrombogenicity while preserving the device's deployment characteristics and radiopacity.

Key Features
- Dual-layer braided design combining an outer low-density stent layer for wall apposition with an inner high-density mesh for flow diversion.
- X surface technology: covalently bonded coating intended to reduce material thrombogenicity.
- Full-length radiopaque tantalum helical strands and distal/proximal markers for fluoroscopic visualization of the working zone.
- Single-step delivery via a dedicated microcatheter, with the option to resheathe prior to detachment.
- Nominal dimensions: 4.0 mm diameter, 18 mm working length.
- Self-expanding nitinol/cobalt-chromium braid construction (refer to current IFU for material details).

Clinical Applications
- Endovascular flow diversion in appropriately selected intracranial aneurysms of the cerebral vasculature.
- Use in vessels whose diameter matches the labeled device size; consult the manufacturer's sizing matrix and IFU for parent vessel range, indications, contraindications and warnings.
- Intended for use by physicians trained in interventional neuroradiology and flow-diverter implantation.

Product Information
- Brand: Terumo Neuro
- Product: FRED X Flow Diverter Stent
- REF / UPN: XFRED4012
- Implant diameter: 4.0 mm
- Implant working length: 18 mm
- Category: Flow diverter / neurovascular implant
- Delivery system compatibility: Refer to current IFU and compatibility matrix.
- Sterility / single use: Sterile, single-use device (confirm per package labeling).
- Regulatory status: Not specified in the located sources; verify regional approval status before procurement.