[Injection Pressure Evaluation of the New Venous Catheter with Side Holes for Contrast-enhanced CT/MRI].

The simulation study was conducted for the new venous catheter with side holes of contrast-enhanced computed tomography (CT) and magnetic resonance imaging (MRI) to evaluate the infusion pressure on four contrast media and several injection speeds. All infusion pressure of the new venous catheter with side holes were less than 15 kg/cm2 as limitation of extension tube and also reduced the infusion pressure by 15% at the maximum compared to the catheter with single hole. The results suggest that the new venous catheter with side holes can reduce the infusion pressure by power injection of contrast-enhanced CT and MRI.

Contrast-induced nephropathy (CIN) of patients with renal dysfunction in CT examination.

PURPOSE: To investigate the incidence and risk factors of contrast induced nephropathy (CIN) after contrast enhanced (CE) computed tomography (CT) in patients with renal dysfunction. MATERIALS AND METHODS: Two hundred sixteen inpatients with estimated glomerular filtration rates (eGFR) <60 ml/min/1.73 m2 underwent CE CT using iodine doses of 420 or 480 mg I/kg. Data of all enrolled patients was collected for baseline serum creatinine level (SCr), post-CE CT SCr within 3 days after CE CT, and conditions considered risk factors for CIN [renal dysfunction, contrast media dose, advanced age, diabetes mellitus, no intravenous hydration, cardiac dysfunction (left ventricular ejection fraction <60%) and intensive-care unit (ICU) admission]. CIN was defined as an increase in SCr level of more than 0.5 mg/dl or more than 25% from baseline within 3 days post-CE CT without any other identifiable cause of acute kidney injury. RESULTS: The incidence of CIN was 11/216 (5.1%) and was associated with cardiac dysfunction [odds ratio (OR) 6.540; 95% confidence interval (CI) 1.090-39.300; p = 0.040] and ICU admission (OR 11.500; 95% CI 2.050-64.100; p = 0.005). CONCLUSION: Our results suggested that cardiac dysfunction and ICU admission may be risk factors for CIN in patients with preexisting renal dysfunction.