Alternative vascular device for high-flow computed tomography angiography: ultrasound-guided long peripheral catheter...

Radiological studies that require contrast media are common and useful in the emergency department. Alternatives have been proposed for the administration of contrast agent in patients with difficulty in the insertion of vascular access. Since 2017, our institution has used a 4-Fr × 10-cm-long peripheral catheter (Leadercath; Vygon) for venous insertion. Its ultrasound-guided insertion is carried out by emergency physicians. So far, there are no reports in the literature about the use of this long peripheral catheter for computed tomography angiography.

To describe the experience with the said device, to point out the complications associated with it, and to evaluate it as an alternative way to gain vascular access for patients with limited venous access.

An observational, analytical, and retrospective study was conducted. The study included patients who received an ultrasound-guided 4-Fr × 10-cm-long peripheral catheter (Leadercath; Vygon). Transparent, radiopaque, polyethylene, 18-gauge Leadercath from Vygon, sold as peripheral arterial catheter and sometimes used "off-label" as venous catheter with a flow capacity of up to 24 mL/min, was used. The flow capacity for gravity flow is 24 mL/s; with pump-driven flow, we achieved a flow infusion of 5-6 mL/s. Univariate analyses were performed. Normality was determined through the Shapiro-Wilk test.

In total, 172 patients met the inclusion criteria. Of them, 115 (67%) were female and the average age was 59 years. The main indication for performing the computed tomography angiography was the suspicion of pulmonary embolism (38.6%). The most frequent type of computed tomography angiography study was pulmonary tomography (88 patients, 51.5%). The contrast medium infusion rate was 6 mL/s in 51.5% (n = 88) of cases, 4.5 mL/s in 36.3%, and 5 mL/s in 12.3%. One adverse event occurred.

An 18-gauge-long peripheral catheter (4 Fr × 10 cm, Leadercath; Vygon) following specific protocols appears to be safe for conducting high-flow computed tomography studies in patients with limited venous access.