When accessing the implanted port of a central venous access device (CVAD), what action
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should the nurse take to ensure the port is patent?
Aspirate a few milliliters of blood into the extension tubing to check for blood return.
Aspirate a few milliliters of blood into the syringe to check for blood return.
Open the clamp on the extension tubing and instill 3 to 5 mL of air.
Open the clamp on the extension tubing and flush with
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