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  • Title: Optimal insertion depth of subclavian vein catheterization via the right supraclavicular approach in children.
    Author: Ye P, Tan Y, Shi S, Liu L.
    Journal: Paediatr Anaesth; 2021 Mar; 31(3):346-351. PubMed ID: 33336473.
    Abstract:
    BACKGROUND: Methods to determine the optimal insertion depth of ultrasound-guided supraclavicular approach to the subclavian vein (SCV) catheterization, alternatively used for central venous access, are debatable in children. AIM: We investigated the applicability and reliability of the modified formula for determining the depth of SCV catheterization using an ultrasound-guided supraclavicular approach in children. METHODS: This prospective observational study included 36 children (age <6 years; weight ≥5 kg) scheduled to undergo congenital heart disease surgery. After intubation, ultrasound-guided supraclavicular approach to the SCV catheterization was performed. Actual insertion depth was determined by real-time transesophageal echocardiography. Insertion depth was calculated by subtracting 1 cm from the sum of the distance from the insertion point to the sternal head of the right clavicle and that from the latter point to the midpoint of a perpendicular line drawn from the sternal head of the right clavicle to the line connecting the nipples. RESULTS: Insertion depth calculated with the modified formula and actual insertion depth of the SCV catheter correlated strongly (r = .806, 95% confidence interval [CI]: 0.658-0.908; p < .001). Bland-Altman analysis showed a mean bias and precision of 0.36 and 0.65 cm, respectively (95% CI: 0.14-0.58, 95% limits of agreement: -0.92, 1.64). All plots were above the -1.0 line, indicating no catheter tip insertion into the right atrium. CONCLUSIONS: Optimal insertion depth for an ultrasound-guided supraclavicular approach to the SCV catheterization can be calculated using modification of a surface landmark formula in children younger than 6 years and weight heavier than 5 kg.
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