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Table 1 Number (%) of detected K-wire perforations in different AP views

From: Detection of articular perforations of the proximal humerus fracture using a mobile 3D image intensifier – a cadaver study

Location of perforation Arm position
45° ER 30° ER 30° IR 45° IR
Superior-posterior 6/9 9/9 8/9 3/9 2/9
Superior-anterior   1/12 7/12 12/12 12/12
Anterior    2/11 11/11 11/11
Posterior 10/12 12/12 3/12   
Inferior 1/12 5/12 11/12 4/12 3/12
Total (n = 56) 17 (30.4%) 27 (48.2%)* 31 (55.4%) 30 (53.6%) 28 (50%)
  1. *significantly more perforations were detected in 30° external rotation (ER) compared to 45° ER (p = 0.041)