Torsion stability of coronary catheters
Bach, R.; Jung, F.; Schmidt, R.M.; Heidmann, D.; Scheller, B.; Spitzer, S.; Franke, R.P.
Biomedizinische Technik. Biomedical Engineering 39(1-2): 13-18
1994
ISSN/ISBN: 0013-5585 PMID: 8142580 Document Number: 431712
In the present study, the torsional moments of 8 different types of catheter having two different calibres (n = 5 in each case) were investigated. The catheters were made of linear polyurethane (Cordis, Netherlands). The transmitted torsional moments of the 5.2 Fr. catheters positioned in a straight line were 1.48 +- 0.09 Ncm (VK = 6%), positioned in a 90 degree curve 1.39 +- 0.11 Ncm (VK = 8%). The corresponding figures for the 6 Fr. catheters were 2.43 +- 0.20 Ncm (VK = 8%) and 2.26 +- 0.20 Ncm (VK = 9%). The highly stable transmission behaviour in particular of the 5 Fr. catheters - with a variation coefficient of the torsional moments of 6% - is due mainly to the accurate manufacture of the catheters, and the material chosen. The study is a first step towards achieving systematic quality control of the materials used for diagnosis and therapy.