कैनुलेशन (सुई लगाना) क्या है?

विस्तृत जानकारी

Cannulation is the process of inserting two needles (arterial and venous) into a hemodialysis vascular access. The primary techniques are: (1) Rope-ladder (rotating site) — puncture sites rotated systematically along the length of the access, each 0.5-1 cm apart, allowing uniform healing and reduced aneurysm risk; (2) Buttonhole (constant site) — same puncture site, same angle, same depth each session, using blunt needles after track formation (6-12 insertions). KDOQI 2019 recommends rope-ladder as the standard technique, with buttonhole reserved for self-cannulating patients. Needle gauge selection: 15-16G for AVF, 17G for new AVF/AVG. Needle tip position is verified by aspiration (blood return) and absence of infiltration. Infiltration occurs in 3-12% of cannulations and requires immediate removal, cold compress, and rescheduling access evaluation.

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