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?

Choice A rationale Auscultating the site for a bruit is a standard and essential nursing technique to assess the patency of an arteriovenous graft. A bruit is a rushing or humming sound caused by the turbulent blood flow through the high pressure communication between the artery and the vein. The presence of a bruit indicates that the graft is open and blood is flowing through it. Normal assessment should include both the auscultation of this sound and palpation. Choice B rationale While a Doppler stethoscope can detect blood flow, it is generally used when pulses are difficult to palpate or when assessing peripheral arterial disease. For a functioning arteriovenous graft, the blood flow is typically strong enough to be heard with a standard stethoscope. Routine assessment of graft patency relies on the detection of the thrill and bruit directly at the site of the graft itself rather than focusing on the antecubital fossa unless specifically indicated. Choice C rationale Measuring blood pressure in an arm with an arteriovenous graft or fistula is strictly contraindicated. The pressure from the blood pressure cuff can cause collapse of the graft, leading to clotting and permanent loss of the access site. Additionally, the readings would likely be inaccurate due to the altered hemodynamics of the limb. Nurses must always use the opposite arm for blood pressure measurements and avoid any constrictive clothing or procedures on the access arm. Choice D rationale Checking the brachial and radial pulses provides information about the distal circulation of the limb, but it does not directly confirm the patency of the graft itself. While it is important to ensure that the hand is well perfused and that there is no "steal syndrome," where the graft diverts too much blood from the extremity, it is not the primary technique for graft assessment. Patency is confirmed by checking for the bruit and the thrill.