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FIG 4. A and B, Needles are retracted from shaft by pulling on ring handle. As they emerge from shaft (close-up view A), needles bevel away from shaft so as to pierce edges of the arteriotomy site, and then enter the hub. Then they emerge from hub with suture strings attached (black arrowhead in B). A forceps is used to withdraw needles and sutures from hub completely. Note that thread is attached to the end of needle, which emerges first from the hub (arrow)
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