title: [Torsion stability of coronary catheters].
abstract: 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.
authors.affiliation: Abteilung für klinische Hämostaseologie und Transfusionsmedizin, Universität des Saarlandes, Homburg/Saar.
authors.forename: R
authors.initials: R
authors.lastname: Bach
authors.forename: F
authors.initials: F
authors.lastname: Jung
authors.forename: R M
authors.initials: RM
authors.lastname: Schmidt
authors.forename: D
authors.initials: D
authors.lastname: Heidmann
authors.forename: B
authors.initials: B
authors.lastname: Scheller
authors.forename: S
authors.initials: S
authors.lastname: Spitzer
authors.forename: R P
authors.initials: RP
authors.lastname: Franke
mesh_terms: D006328:Cardiac Catheterization / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D008432:Mathematical Computing; D012984:Software; D014102:Torsion Abnormality
vernacular_title: Torsionsstabilität von Koronarkathetern.