“…The search for visible, palpable veins of medium/large caliber, with a straight path, allows to the professional a higher probability of successful punctures, also indicating their predominance (Nobre & Martins, 2018;Oliveira et al, 2019). The choice of the peripheral venous catheter of larger caliber is justified by the particularities of examinations because the contrast media are administered with high flow (up to 5 mL/second), especially in CT scans, in which the volume reaches 100mL (Acauan & Rodrigues, 2015).…”