S-Wire Benefits

  • Corewire of superelastic nitinol, coated with PTFE
  • Unique distal “S” shape enhancing procedural safety
  • Unequalled shape retention
  • No need for a coil surrounding the full length of the device. A stainless steel coil, coated with silicone, is joined to the distal 12cm

Specifications

Length: 260cm

Diameter: 0.035”

Coil Loop Diameter: 3cm

Corewire: Nitinol

Coil: Stainless Steel

Coil Coating: Silicone

Shaft Coating: PTFE

Attributes

S-Wire Competitor TAVR Wires
Wire material Nitinol Stainless steel
Distal curve shape Unique, patented “S” shape “Pigtail” shape
Distal shape retention No loss of shape when straightened and advanced through catheters Loss of shape once straightened
Wire shaft Unable to be kinked or bent May kink

Wire Stiffness

  • The chart to the right is a comparison of the bending stiffness of various guidewires commonly used to deliver TAVR valves. As Valve Delivery Systems (VDS) have become lower profile and more flexible, the necessary degree of guidewire support has decreased.
  •  The S-Wire is slightly less stiff than competitors by design; yet still offers sufficient stiffness to deliver the VDS.

Packaging

  • The S-Wire can be supplied in a Bulk Non Sterile (BNS) or sterile, packaged and labeled configuration.
  • The sterile S-Wire packaging configuration is 5 pouched wires per box.
  • A preloaded wire straightener is included with the packaging.
  • The tapered distal end of the wire straightener makes it  quick and easy to advance the S-Wire into the proximal hub of a catheter positioned in the left ventricle.

Configuration During Deployment

  • As the wire is advanced out the end of a catheter positioned in the left ventricle, the distal portion of the wire initially curves in one direction.
  • Once the distal 10mm of wire is advanced, the distal curve of the wire then abruptly changes direction 180 degrees.
  • This provides unique  benefits, compared with traditional spiral-shaped wires:
    • the distal S curve of the wire centers itself in the left ventricle
    • wire perforation of the left ventricle is highly unlikely
    • wire entanglement with the mitral valve apparatus – papillary muscles, chordae tendinae –  is also unlikely