5.Application of a new catheter to be determining cardiac output through cor sinistrum with thermodilution.
Fei HUANG ; Xiao-Ling LI ; Li-Min ZHENG ; Ming-Ling WANG ; Yu-Mei LI ; Xiao-Ling LIU
Chinese Journal of Applied Physiology 2008;24(2):254-256
AIMTo introduce a new device and catheter to be determining cardiac output through cor sinistrum with thermodilution.
METHODSOwn control was introduced in eight dogs. A pulmonary thermodilution catheter was used through the cor dextrum of the dogs; The new-design catheter was used through artery, and there were two situs to fix:its ahead in left atrium and the ahead near to aortic root. Determine cardiac output (CO) under four circumstances: controlled respiration, apnoea, in controlled hypotension, after controlled hypotension.
RESULTSThere was no significant difference among the parameters (CO and cardiac index) of all circumstances. The CO determined by the pulmonary thermodilution catheter and those by the new-design catheter in two situs were positive correlation, and the gamma were 0.986, 0.989; likewise, the cardiac index (CI) was positive correlation, and the gamma were 0.983, 0.985. The CO and CI by the new-design catheter between two situs were positive, and the gamma were 0.992, 0.988.
CONCLUSIONThe parameters by the new-design catheter and those by the pulmonary thermodilution catheter were concordant. In comparison with the pulmonary thermodilution catheter, the new-design catheter had simple device and could be easily operated.
Animals ; Cardiac Output ; physiology ; Catheterization, Swan-Ganz ; instrumentation ; Dogs ; Thermodilution ; methods
7.Comparative study of 4Fr catheters using the ACIST variable rate injector system versus 6Fr catheters using hand manifold in diagnostic coronary angiography via transradial approach.
Lei HOU ; Yi-dong WEI ; Jing SONG ; Wen-liang CHE ; Wen-hui PENG ; Yong WANG ; Wei-ming LI ; Ya-wei XU ; Da-yi HU
Chinese Medical Journal 2010;123(11):1373-1376
BACKGROUNDThe transradial approach is regarded as a useful vascular site for coronary procedures. The aim of this study was to test whether 4Fr catheters assisted by ACIST variable rate injector system can produce comparable angiographic quality and reduce the risk of radial artery injury compared to hand manifold 6 Fr catheters.
METHODSA total of 1816 patients were studied consecutively, among whom 856 patients received coronary angiography by 4 Fr catheters (4Fr group) and 960 patients by 6 Fr catheters (6Fr group). Angiographic and procedural characteristics were observed and recorded. The luminal inner radial arterial diameter before and after the procedure were collected.
RESULTSThe baseline clinical characteristics were similar in both groups. There were no significant differences in procedure time, radiation dose and quality scores in both groups (P > 0.05), but more contrast media was delivered in the 6Fr group (P < 0.001). The mean radial arterial diameter six months after the procedure in the 6Fr group reduced significantly compared to that measured one day prior to the procedure (P < 0.001).
CONCLUSIONSCoronary angiography using the 4Fr catheters with Acist power injection system can achieve an acceptable diagnostic quality while at the same time minimizing radial artery injury and contrast media consumption.
Aged ; Cardiac Catheterization ; instrumentation ; Coronary Angiography ; instrumentation ; methods ; Female ; Humans ; Male ; Middle Aged ; Radial Artery ; diagnostic imaging ; Ultrasonography
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