TORSIONAL STABILITY OF CORONARY CATHETERS

Citation
R. Bach et al., TORSIONAL STABILITY OF CORONARY CATHETERS, Biomedizinische Technik, 39(1-2), 1994, pp. 13-18
Citations number
11
Categorie Soggetti
Engineering, Biomedical
Journal title
ISSN journal
00135585
Volume
39
Issue
1-2
Year of publication
1994
Pages
13 - 18
Database
ISI
SICI code
0013-5585(1994)39:1-2<13:TSOCC>2.0.ZU;2-P
Abstract
In the present study, the torsional moments of 8 different types of ca theter having two different calibres (n = 5 in each case) were investi gated. The catheters were made of linear polyurethane (Cordis, Netherl ands). The transmitted torsional moments of the 5.2 Fr. catheters posi tioned in a straight line were 1.48 +/- 0.09 Nem (VK = 6 %), positione d 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 behaviou r in particular of the 5 Fr. catheters with a variation coefficient of the torsional moments of 6 % - is due mainly to the accurate manufact ure of the catheters, and the material chosen. The study is a first st ep towards achieving systematic quality control of the materials used for diagnosis and therapy.