Certified Clinical Hemodialysis Technician (CCHT) Practice Exam 2025 - Free CCHT Practice Questions and Study Guide

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What is the correct angle to cannulate a fistula?

30 Degrees

45 Degrees

The correct angle to cannulate a fistula is 45 degrees. This angle allows for optimal insertion of the needle into the fistula while minimizing trauma to the tissues surrounding the access site. The 45-degree angle strikes a balance that helps ensure the needle reaches the lumen of the vessel correctly, providing a good blood flow during hemodialysis.

Using a steeper angle, such as 60 or 90 degrees, risks damaging the vessel wall and could result in complications, like infiltration or penetration of the opposite wall of the vein. A shallower angle, such as 30 degrees, may not adequately access the vessel lumen, increasing the difficulty of the procedure and potentially reducing the effectiveness of the dialysis treatment.

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60 Degrees

90 Degrees

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