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. 2012 Jul 19;7(10):1632–1638. doi: 10.2215/CJN.02730312

Figure 2.

Figure 2.

Nursing perceived difficulty of needling over the course of the study. The difficulty score was calculated on a weekly basis as the mean of the three hemodialysis sessions per week. The difficulty scores were significantly higher for buttonhole needling (for both arterial and venous needles) compared with standard needling starting at week 4.