Fig. 3
From: Contrast opacification on thoracic CT angiography: challenges and solutions
Graphs and tables from the power injector: pressure-time and flow rate-time graphs. In a patient with contrast flow rate above the recommended maximum (a). The planned flow rate of 5.4 mL/s using an 18 g IV exceeded the recommended maximum of 5.0 cc/s. This resulted in peak pressure reaching 300 psi with resultant disarming and decreased flow rate of 2.8 mL/s with suboptimal pulmonary artery enhancement. Power injector pressure-time and flow rate-time graphs in a different patient with IV infiltration during the injection (b) shows rapid drop in pressure and cessation of flow at the time of contrast extravasation