W20b Twardowski 1 Buttonhole Method of Fistula ... - SFAV
W20b Twardowski 1 Buttonhole Method of Fistula ... - SFAV
W20b Twardowski 1 Buttonhole Method of Fistula ... - SFAV
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Wrong <strong>Buttonhole</strong> Angle<br />
• Needle successfully<br />
inserted into the<br />
buttonhole tunnel track-<br />
but the angle is not<br />
aligned with the vessel<br />
flap<br />
• The needle can bounce<br />
on the vein and will not<br />
displace the vessel flap