[The flow of contrast media in coronary catheters: study of the structural quality in interventional cardiology].
In the present study we investigated the contrast medium flow in 8 different types of left heart catheter having two different diameters (each n = 5). Using a 10 ml syringe and the contrast medium Ultravist 370, we calculated a mean value of 94.24 N + 16.01 for the maximum manual injection force in 18 test subjects. For the sake of simplicity, the figure of 100 N was defined as standardized manual force (which is within the standard deviation). If the maximally admissible static pressure of 82.5 bar is not to be exceeded, flow rates of not more than 16-17 ml/s are possible with 5.2 Fr. catheters, and 21-23 ml/s and 1.46 ml/s for 5.2 Fr. catheters, and between 1.99 ml/s and 2.17 ml/s for 6 Fr. catheters. Thus, a 50% higher flow can be achieved with 6 Fr. catheters as compared with 5.2 Fr. catheters at the same injection force. The iodine delivery rates are between 506 mg iodine/s and 539 mg iodine/s for 5.2 Fr. catheters, and between 738 mg iodine/s and 804 mg iodine/s for 6 Fr. catheters. The figures for the jet stream.
Jung
F
F
Abteilung für klinische Hämostaseologie und Transfusionsmedizin, Universität des Saarlandes, Homburg.
Bach
R
R
Scheller
B
B
Schmitt
R M
RM
Spitzer
S
S
Heidmann
D
D
D006328:Cardiac Catheterization / Q000295:instrumentation*; D003287:Contrast Media; D004867:Equipment Design; D006801:Humans; D007472:Iohexol / Q000008:administration & dosage / Q000031:analogs & derivatives*; D012015:Reference Standards; D012212:Rheology; D014783:Viscosity
D003287:Contrast Media; D007472:Iohexol; C038192:iopromide