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Only the brachial artery should be used for arterial access for dual catheter system endoAVF creation. In the event that the patien t has a brachial artery that measures ≥2 mm in diameter, document result per facility requirements (Table 4) and continue screening otherwise they cannot qualify for an endoAVF procedure utilizing the dual catheter system. 15

Table 4 – Brachial Measurements

Source: BD, Bard. WavelinQ™ 4F Vessel Mapping Sheet. BD-12525v2. https://wavelinq.bd.com/wordpress/wp-content/uploads/2020/03/BD-12525v2-WavelinQ-4F- Vessel-Mapping-Sheet.pdf. Accessed October 10, 2021.

Creation Site Selecting the optimal vascular access type requires careful consideration of individual patient characteristics and clinical factors. For patients to be qualified candidates for endoAVF, they must have adequately sized arteries and veins at the intended creation site. The radial artery assessment should be taken immediately after the perforator and not too distal down the arm. The sonographer should measure the radial artery and paired radial veins not too distal down the extremity (Figure 13). Next, assess the common ulnar trunk, which are each typically located between the radial and interosseous take-off. Also verify triphasic flow and assess for the presence of calcium.

Figure 13 – Measuring the Radial Artery and Paired Radial Veins

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