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Catheter Analysis Tab

Failure Mode Analysis​

  • Critical Buckling (Euler): The maximum compressive axial force a section can withstand before it suddenly bows or buckles, representing a crucial measure of the catheter's pushability.
  • Kink Radius (Brazier): The minimum radius of curvature a section can sustain before structural collapse due to kinking.
  • Max Moment (Material Failure): The maximum internal bending moment the section can withstand before the material reaches its yield or ultimate stress limit.
  • Tensile Failure Load: The maximum axial pulling force that can be applied to the section before it breaks.
  • Torque Failure: The maximum twisting force (torque) that can be applied to the section before it breaks.
  • Burst Pressure: The maximum internal fluid pressure the section can contain before its wall ruptures.
  • External Crush Pressure: The maximum external pressure the section can withstand before its structure collapses inward.

Stiffness Properties​

  • Bending Stiffness (EI): This value, also known as Flexural Rigidity, defines the catheter section's resistance to bending.
  • Torsional Stiffness (GJ): This value, also known as Torsional Rigidity, defines the catheter section's resistance to twisting.
  • Axial Stiffness (EA): This value represents the resistance to stretching and compression along the axis.
  • Linear Density: This is the mass per unit length of the section.

Calculated Reinforcement Characteristics​

Braid/coil characteristics are calculated for each reinforced layer for each catheter section.

  • Angle: Wrap angle of the braid/coil wire.
  • Pitch: The axial distance between successive wraps of the braid or coil wire.
  • Coverage: The percentage of the catheter's surface area covered by the reinforcing wires.
  • Fill Factor: The volume fraction of the reinforced layer occupied by braid/coil wire.
  • Total Wire Length: The total unspooled length of wire required to construct this specific layer for the current section length.