A nurse is caring for a client who has a new arteriovenous (AV) graft in his left forearm. Which of the following techniques should the nurse use to assess the patency of this graft?

Auscultate the site for a bruit.

Measure the client's blood pressure to ensure it is higher in the left arm than the right.

Auscultate the antecubital fossa using a Doppler.

Check the brachial and radial pulses of the left arm simultaneously.