Keywords:
Cardiovascular system, Veins / Vena cava, Interventional vascular, CT-Angiography, Catheter arteriography, Catheter venography, Angioplasty, Computer Applications-General, Thrombolysis, Blood, Trauma, Outcomes
Authors:
T. Tran, C. H. Kristiansen, F. Haidl, S. Roy, J. C. Lindstrom, H. Ashraf, P. Lauritzen; Oslo/NO
DOI:
10.26044/ecr2019/C-2142
Methods and materials
Twenty-four patients with clinical suspicion of deep vein thrombosis were prospectively included.
CTV was performed with a fixed scan delay of 120 seconds after intravenous injection of 350 mg/mL iodinated contrast medium.
Additionally,
single scans of the popliteal vein were obtained at 30 s intervals from 30 to 210 s to determine TPA.
(Fig.1) shows single scans of the popliteal vein from 30s (top image) to 210s (bottom image),
a region of interest (ROI) was placed in the vein on both sides measuring the attenuation in Hounsfield Units (HU). CO and HR were recorded continuously and non-invasively using a photo-plethysmography device (Nexfin HD,
BMEYE,
Amsterdam) (Ref.2).
(Fig.2) demonstrates the setup of the Nexfin device for monitoring. Attenuation was measured at specified sites in the inferior vena cava,
and in both external iliac,
common femoral and popliteal veins.
The associations between CO and TPA and HR and TPA were estimated by Spearman's rank correlation and linear regression.