Ultrasound-guided dynamic needle tip positioning technique for radial artery cannulation
Main Article Content
Abstract
Arterial cannulation remains a cornerstone in the management of critically ill and surgical patients, facilitating continuous blood pressure monitoring, blood gas analysis, and titration of vasoactive drugs. Among the available sites for arterial access, the radial artery is most commonly preferred due to its superficial location, ease of cannulation, and dual blood supply to the hand, which lowers the risk of ischemic complications. Invasive arterial pressure monitoring is regarded as the gold standard, despite potential errors from transducer systems. Cannulation can be guided either by palpation or ultrasound. Although the traditional palpation method remains widely used, ultrasound-guided techniques, particularly Dynamic Needle Tip Positioning, have demonstrated superior first-pass success rates, reduced complications, and faster cannulation times. Dynamic Needle Tip Positioning, a modified short-axis ultrasound approach, enhances needle tip visualization and control during insertion. Across multiple studies, Dynamic Needle Tip Positioning outperformed palpation and some ultrasound methods, though its effectiveness is operator-dependent. Overall, Dynamic Needle Tip Positioning represents a safer, more efficient advancement in arterial line placement.
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