Comparison of ultrasound-guided femoral artery cannulation versus palpation technique in neonates undergoing cardiac surgery

Objectives: Palpation technique for femoral artery cannulation can be very difficult, especially in neonates. In this study, we evaluated whether ultrasound-guided cannulation of the femoral artery is superior to palpation technique in neonates undergoing cardiac surgery. Methods: Forty neonates undergoing cardiac surgery were prospectively randomized into two groups (Ultrasound group and Palpation group). Access time, number of attempts, number of successful cannulations on first attempt, success rate, number of cannulas used, inadvertent access, and complications were compared between the two groups. Cost analyses of the cannulation were performed in two groups. Results: In the ultrasound group, access time for femoral artery cannulation was shorter (6.4 +/- 3.0 and 10.2 +/- 4.4, p = 0.003) and the number of attempts (1.4 +/- 0.6 and 2.3 +/- 0.8, p < 0.001) was lower compared to the palpation group. The number of successful cannulations on first-attempt (15 (75%) and 5 (25%), p = 0.002) and the success rate (95% (19) and 60% (12), p = 0.008) were higher in the ultrasound group. The number of cannulas used in the ultrasound group was less than the palpation group (p = 0.001). The cost of intervention was higher in the palpation group compared to the ultrasound group (p = 0.048). Conclusions: The ultrasound-guided cannulation of the femoral artery in neonates is superior to the palpation technique based on the increased of the number of successful first-attempt cannulation and success rate, and the reducing of the access time, number of attempts, number of cannulas used, and cost of cannulation.