Relationship between maximum injection pressure and extravasation rate of contrast media in computed tomography
N Koori1, R Sugai2, T Hasegawa2
1Department of Radiological Technology, Faculty of Medical Technology, Niigata University of Health and Welfare, 1398 Shimami-cho, Niigata City, Niigata 950-3198, Japan.
Aim:
The purpose of this study was to use multivariate analysis to clarify the relationships between the extravasation rates of contrast media and maximum injection pressure in adults.
Materials And Methods:
We recruited 2688 patients who underwent contrast-enhanced computed tomography. The intravenous lines were placed in the median cubital vein by the nurse or physician in charge of the examination. We obtained the following information: age, sex, body mass index, indwelling needle diameter, injection speed, contrast media concentration, fractional dose, maximum injection pressure, presence or absence of extravasation, and in/out-patient status.
Results:
The odds ratios of in/out-patients and maximum injection pressures were 2.62 (P < 0.05) and 1.64 (P < 0.001), respectively. Using a cut-off value of 9.5 kg/cm2, the area under the curve of the maximum injection pressure was 0.68.
Conclusion:
We recommend that a threshold of 9.5 kg/cm2 be set for the maximum injection pressure when placing an intravenous line in the median cubital vein to efficiently reduce extravasation of the contrast media.
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