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Ultrasound-guided femoral arterial access in pediatric cardiac catheterizations: A prospective evaluation of the prevalence, risk factors, and mechanism for acute loss of arterial pulse.

OBJECTIVES: The objectives of this study were to describe the prevalence, mechanisms, and identify risk factors for acute loss of arterial pulse (LOP) in children who had ultrasound-guided femoral arterial access (UGFAA) during cardiac catheterization.

BACKGROUND: LOP is a known complication in children following femoral arterial (FA) access for cardiac catheterization. The prevalence of LOP requiring treatment ranges between 4% and 8%.

METHODS: A prospective study was performed including 486 cardiac catheterizations using UGFAA in children ≤18 years over a 3 years period. Ultrasound and Doppler evaluations were performed prior to and at the end of the procedure.

RESULTS: LOP was identified in 33 cases (6.8%) with 23 (4.7%) requiring treatment. For children ≤6 months, the prevalence of LOP requiring treatment was 13.6%. FA diameter <3 mm was the only significant independent predictor for LOP (OR: 8.44, 95% CI: 2.07-34.5, P < 0.001). Smaller patient size, number of access attempts, time required for access, operator experience, sheath size, and length of procedure were not found to be significant predictors. Children with LOP had a greater percentage decrease in vessel diameter (median 62% vs 18%, P < 0.001) compared to those without LOP. FA thrombus was diagnosed only in 9 patients (27% of those with LOP).

CONCLUSIONS: The prevalence of LOP requiring treatment is 4.7% when UGFAA is used during pediatric cardiac catheterizations. Arterial spasm was more common than thrombus as a cause of LOP. FA diameter <3 mm was the only independent predictor for LOP in this carefully designed prospective study. © 2016 Wiley Periodicals, Inc.

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