Establishing safe zones to avoid nerve injury in the posterior minimally invasive plate osteosynthesis for humerus fractures: a magnetic resonance imaging study

Treatment of distal third humeral shaft fractures with posterior minimally invasive plate osteosynthesis (MIPO) with segmental isolation of the radial nerve: minimum one-year follow-up

“…For our group, the ideal fracture to be treated with a posterior MIPO plate includes fractures that are distal to the radial nerve at its exit from the posterior cortex of the humerus as long as the fracture hematoma is not violated by dissecting the radial nerve; therefore, fractures distal to 53.6% of the HL in relation to the PLAA will be ideal for treatment with this technique. 3 …”

“…The location of the proximal window was always confirmed in relation to 36.6% of the HL (defined as the straight-line distance between PLAA and the lateral epicondyle). 3 This measurement was made using a suture to directly measure the HL, and then it was quantified with a surgical ruler. Dissection was then performed between the long portion of the triceps and the posterior border of the deltoid muscle down to the humerus.…”

“… 4 Contreras et al confirmed that the radial nerve location was 100.2 ± 17.1 mm (36.6% HL) at the humerus medial border in relation to PLAA based on magnetic resonance imaging. 3 …”