Catheterization of the radial or brachial artery in neonates and infants.

BACKGROUND

In neonates and small children, percutaneous insertion of arterial catheters may be very difficult because of the small diameter of the arteries. Multiple attempts at cannulation are common and may be a predictor of serious adverse events following arterial cannulation. As an end artery, the brachial artery is usually not recommended for cannulation. However, limited data exist about brachial artery catheterization in neonates and young children. In this retrospective study, we report our experience with arterial indwelling catheters placed in neonates and small children prior to surgery for congenital heart defects.

METHODS

We reviewed 1473 patient medical files containing information about 1574 arterial lines for perioperative and intensive care monitoring. Patient data (age and weight), cannulation characteristics (site, type, percutaneous or cut down insertion), duration of catheterization and complications were documented using the anesthesia and/or intensive care unit files. Patients were divided into three groups according to body weight. Group I: patients with a bodyweight up to 5 kg (n = 561), group II: bodyweight 5-10 kg (n = 615), and group III: bodyweight 10-20 kg (n = 297).

RESULTS

The vast majority of our patients had radial or brachial artery catheterization. In group 1, we placed 200 brachial artery lines. Radial artery insertion was more successful with increasing body weight. Two 'cut downs' were necessary to place the arterial cannula (0.3%). The mean duration of the arterial cannula in place was 5.8 + 4.3 days in group I, which was significantly longer than in group III (2.9 + 2.2 days). Multiple attempts at catheter insertion were required for 200 patients in group I (P < 0.05 compared with groups II and III). The number of guide wires used was similar in all study groups. Generally, we preferred 24 and 22 G catheters for cannulation. Serious complications such as permanent ischemic damage were not observed. Temporary occlusion of an artery occurred in five of 1473 patients. The rate of local infection was 0.5% in group I, 0.7% in group II and 2.3% in group III. Local hematoma were observed more frequently, but with no relevant consequences. Most of our patients were cannulated on the right side. In group I, 112 brachial artery catheters were placed. The greater the weight, the more radial catheters were used compared with a brachial approach. The mean functional time of the catheters (5.8 +/- 4.3 days in group I) was significant shorter compared with patients from group III (2.9 +/- 2.2 days). In 33.3% (n = 200) multiple punctures were needed to place a catheter in group I (P < 0.05 compared with the other groups) whereas the use of a guide wire was evenly distributed throughout the study groups. Small catheters (24 and 22 G) were preferred for most patients. In total only eight 20 G sized catheters were used in the children of group III.

CONCLUSIONS

Even considering the nature of a retrospective study design, we conclude that the brachial artery could be considered for cannulation in neonates and small children.