Insights
Successful Medical Device Innovations Come From Doctors and Engineers Collaborating
balance of elongation, yield strength and tensile strength
The balance between elongation, yield strength and tensile strength is a critical research focus for catheter design. While a PTFE liner with high elongation offers flexibility. It will compromise tensile strength and yield strength. Elongation, yield strength and tensile strength can be tailored to different catheters and applications.
What determines stent pushability?
PTFE yield strength and etching efficacy. During stent advancement, the PTFE liner develops sinusoidal strain deformation, so maintaining the inherent yield strength of PTFE is crucial. Additionally, optimal bonding between PTFE and the outer extrusion tube enables counteractive traction forces to resist this deformation.
Key Factors Influencing Catheter Transition Length
The transition length is principally governed by material property differentials, especifically elasticity, viscosity and hardness. When interfacing flexible materials with rigid counterparts, the substantial mechanical disparity necessitates an extended transition length to effectively dissipate interfacial stresses and prevent stress concentration. Additionally, material viscosity affects transition length…
Microcatheters: The Art of Balancing Engineering Paradoxes
Microcatheters must be flexible yet collapse-resistant, stiff yet controllable, force-responsive yet atraumatic. Core performance parameters include Flexibility vs. Stiffness Gradient, Kink Resistance, Bidirectional Force Transmission, Trackability, 1:1 Torque Response, Shapeable Tip, Chemical Compatibility…
