The MRWire is an MRI conditional guide wire which is safe to use in 1.5 and 3.0 Tesla for real-time interventions according to ASTM F2182, F2052, F2053 and F2213 standards. The wire has discrete MRI markers and the entire wire is radiopaque (ASTM F640-79). In addition its construction with a double internal winding and the entire body and tip are packed into one sleeve to prevent detachment of tip and breaking of the internal core. The MRWire has CE mark, FDA 510 K approval and registered by Health Canada
| Tip shape | Straight or angled |
| Tip properties | Soft tip |
| Tip materials | Pebax® |
| Core-shaft-tip | One body preventing breaking and release of fibers |
| Material | Fibre-reinforced composite |
| Outer Sleeve | Pebax® with 40 % BaSO4 |
| MRI visibility | Straight tip– passive markers at discrete positions 0,2,4, and 8 cm from tip |
| angled tip – passive markers at discrete positions 2,4, 6 and 10 cm from tip | |
| Marker technology | SPIONS embedded |
| Technical properties | MR conditional |
| Diameter | 0.89 mm (0.035 inch) |
| Length | 180 cm |
| Physical properties | The MRWire shaft has an average Young’s modulus of 4510 to 5100 MPa |
| The MRWire tip has an average Young’s modulus of 124 to 160 Mpa |
Applicable product standard: sterile, single-use intravascular introducers, dilators and guidewires (ISO/DIS 11070:2013). The product is not certified or availble in the USA.
Video below: MR image (1.5 tesla, GRE) showing discrete markers in the tip and distal from the tip create MRI image artefacts tested by ASTM F2119. The image above shows the artifacts evenly distributed over a guide wire inserted in the right renal artery, followed by ballon dilatation, pull-back of catheter and stenting (large artifact). For more details see Kos et al (2009)
