N7 · Access Assessment and Cannulation

Dialysis nursing · Visual teaching summary · October 3, 2026

Andrew Bland, MD, FACP, FAAP

Visual summary

Inspect, compare with baseline, and escalate a changed access before a preventable loss occurs.

N7 · Access Assessment and Cannulation: six-panel learning summary. Full text follows below.
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Look before every needle

Inspect skin, swelling, redness, drainage, bruising, aneurysms, and healing wounds. Ask about pain, hand coldness, numbness, weakness, recent procedures, and prolonged bleeding after the previous treatment.

Listen and feel

Assess bruit and thrill using the trained examination technique and compare with baseline. A new weak, altered, or absent signal, unusual pulsatility, or significant swelling warrants review before routine cannulation.

Escalate urgent findings

Absent thrill, uncontrolled bleeding, a rapidly expanding hematoma, a cold painful hand, or suspected infection needs prompt clinical assessment. Thin, ulcerated, scabbed, or bleeding skin over an aneurysm is a warning sign.

Cannulate the cleared access

Confirm clearance for use, access direction, appropriate needle sites, and the prescribed technique. Use trained help or ultrasound when indicated; avoid compromised skin and repeatedly puncturing the same small area.

Protect flow after removal

Apply direct pressure sufficient for hemostasis while preserving access flow, following the trained technique. Record bleeding duration and reassess the access; recurrent prolonged bleeding may signal a structural problem as well as anticoagulation.

Handoff performance changes

Report examination findings, cannulation difficulties, pressures, achieved blood flow, alarms, clots, bleeding time, and adequacy trends. Include recent interventions and the agreed action before the next treatment.

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