Busch H P, Stocker K P
Abteilung für Radiologie, Krankenhaus, Barmherzigen Brüder, Trier.
Aktuelle Radiol. 1998 Sep;8(5):232-5.
The aim of this study was to record the flow-rate and to calculate the "iodine delivery rate" (IDR) of contrast media of various viscosities when the contrast media are injected by hand.
Five different catheters for coronary angiography were tested with the injection system Medrad Mark V Plus. Injections were performed with pressures of 100, 200 and 400 PSI. The contrast media examined were Imeron 350, Imeron 400, Omnipaque 350 and Ultravist 370. The IDR was calculated on the basis of the measured flow rate and the Iodine content of the contrast medium.
As was expected, the IDR was higher as the pressure increased. In addition to the Iodine content the viscosity of the contrast medium is a very important factor for the IDR. At both 100 PSI and 200 PSI the increase of the IDR was higher with Imeron 350 than with Imeron 400. The comparison of contrast media with identical Iodine contents but differing viscosities (Imeron 350, Omnipaque 350) clearly showed that the IDR depended on viscosity.
The "iodine delivery rate" is a decisive factor in the opacification of arterial vessels. Both Iodine content and viscosity of a contrast medium are important for the IDR. Because of the low pressure at manual injection, contrast media with low viscosities should be used. A further possibility to increase the IDR is warming-up the contrast medium to body temperature.
本研究的目的是记录流速，并计算手动注射不同粘度造影剂时的“碘输送率”（IDR）。
使用Medrad Mark V Plus注射系统对五种不同的冠状动脉造影导管进行测试。注射压力分别为100、200和400磅力/平方英寸。所检查的造影剂为碘美普尔350、碘美普尔400、欧乃派克350和优维显370。碘输送率是根据测得的流速和造影剂的碘含量计算得出的。
正如预期的那样，随着压力增加，碘输送率更高。除碘含量外，造影剂的粘度也是影响碘输送率的一个非常重要的因素。在100磅力/平方英寸和200磅力/平方英寸时，碘美普尔350的碘输送率增幅高于碘美普尔400。对碘含量相同但粘度不同的造影剂（碘美普尔350、欧乃派克350）进行比较，清楚地表明碘输送率取决于粘度。
“碘输送率”是动脉血管显影的决定性因素。造影剂的碘含量和粘度对碘输送率都很重要。由于手动注射时压力较低，应使用低粘度的造影剂。提高碘输送率的另一种可能性是将造影剂加热至体温。
