Evaluation of the elastic behaviour of central venous PVC, polyurethane and silicone catheters

Abstract

Eighty used and 20 new silicone, polyurethane and polyvinylchloride central venous catheters were tested to establish the Young's modulus and the bending stiffness of the catheters and their introducers. The catheters were subjected to longitudinal traction forces and their lengthening measured. Young's modulus and the geometric moment of inertia were then calculated. It is shown that polyurethane catheters show least variation in their elastic characteristics, and that silicone catheters offer least resistance to bending and do not change their elastic properties after use. All catheters were equally unlikely to cause thrombus production if this is related to excessive bending stiffness.

Prevention of Subsequent Catheter‐Related Bloodstream Infection Using Catheter Locks in High‐Risk Patients Receiving Home Parenteral Nutrition

“…Only a single‐lumen tunneled catheter (Hickman) was used for ELT because several studies have reported that ethanol can erode catheters made with materials other than polyurethane 13 . ‐ 15 Before the initiation of a new HPN cycle, the lumen was flushed using normal saline similar to previous studies 12 …”

Fracturing and stretching of angioplasty balloon catheters under bending with tension

“…This particular catheter shows more ductility than we think is desirable. Polyurethane catheters used in the central venous system have been shown to have less variation in their elastic characteristics than those made of Polyvinyl or silicone, with silicone catheters offering less resistance to bending (Cervera et al, 1989). It is apparent that the optimum balance between ductility and stiffness remains to be established.…”

Constraint‐based motion synthesis for deformable models

“…We model the catheter using 6871 tetrahedra defined by 3185 nodes and set its Young's modulus to 8700 KPa for silicon. 24 The arteries, which can range in diameter from 2.5 mm to 6 mm are modeled using 8330 nodes that define 5548 tetrahedra forming a single layer over the outside . .................................................................... …”