Keywords:
Contrast agents, Extremities, Interventional vascular, Catheter arteriography, Angioplasty, Contrast agent-other, Diagnostic procedure, Arteriosclerosis, Obstruction / Occlusion
Authors:
J. Friesen, B. Friesen, K. K. Lau
DOI:
10.26044/ranzcr2022/R-0128
Methods and materials
All consecutive adult patients who were referred for CO2 lower limb angiography from January 2010 to June 2021 were included. Patients’ CO2 lower limb angiography that did not include below knee run-off arteries were excluded. Angiograms were grouped into CO2-only or CO2 with low-dose ICM (CO2 + ICM) for below knee run-off arteries. The amount of ICM was recorded. The images from each angiogram were randomly and blindly reviewed by two independent radiologists. Overall diagnostic qualities of arterial segments (contrast density, sharpness of vessel contour, artefacts from contrast and motion) were rated on a 5-point Likert scale. Comparison between 2 groups was made with Mann-Whitney test [6], with p<0.05 considered as significant. Post study renal functions were assessed on medical records, and where baseline and follow-up renal function results within 72 hours were available, comparison between pre-ICM and post-ICM renal function was made with paired 2-tailed Student’s t-test [7], with p<0.05 considered as significant.