The posterior interosseous nerve crosses the radial head midline and increases its distance from bony structures with supination of the forearm

Arthroscopic Approaches to Radial Head Fracture Fixation

“…To minimize malpositioning due to a limited view, it is critical to obtain an ample and safe working volume and visualize the RH properly. Whenever working intra-articularly on the lateral aspect of the elbow, adequate joint distension, elbow flexion, and forearm supination are recommended, since this position can increase the distance between the most anterior part of the RH and the anterolateral elbow capsule where the posterior interosseous nerve (PIN) lies [3][4][5].…”

Arthroscopic Fixation of Coronoid Fractures: Antegrade Wire Technique

“…The cannulated needle system is then advanced obliquely towards the joint, always maintaining constant contact with the anterior humeral cortex until the elbow capsule is reached [6]. • Anterolateral portal: Pronation of the forearm is recommended when establishing the portal, since pronation displaces the posterior interosseous nerve (PIN) anteromedially, protecting it from iatrogenic injuries [7]. If an outside-in technique is used, it is advisable to check the needle entry point from the anteromedial portal, and to carefully incise the skin and subcutaneous tissue before inserting the arthroscope sheath and trocar; alternatively, this portal can be established through an inside-out technique.…”

“…Brachial artery and median nerve are at risk over anteromedial aspect and posterior interosseous nerve (PIN) over anterolateral aspect. PIN injury may occur during portal placement and after accidental damage to the anterior joint capsule, which is separated from the nerve just by a thin layer of muscle and adipose tissue [7]. The ulnar nerve damage can occur during portal placement or by using motorized instruments inside the joint in close proximity to the medial capsule.…”

Lateral Epicondylitis and Symptomatic Minor Instability of the Lateral Elbow (SMILE)

“…• The anterior compartment is accessed by proximal anteromedial (AM) and anterolateral (AL) portals. The AL portal is used to insert a retractor aimed toward the radiocapitellar joint to protect the posterior interosseous nerve, which lies just anterior to the capsule at this level [2]. At this point the R-LCL is not identifiable as an isolated structure but appears as a thickening of the capsule.…”