Tardy ulnar nerve palsy caused by cubitus varus deformity

Abstract

Clinical features and X-rays of thirty-four cases with cubitus varus deformity were analysed in order to explain the occurrence of tardy ulnar nerve palsy caused by cubitus varus deformity. Cubitus varus cases with tardy ulnar nerve palsy, compared to cases without it, were older at the first visit to the clinic for cubitus varus deformity. There were no other differences between the two groups in clinical features. Computed tomography showed that the olecranon moved to the ulnar side against the olecranon fossa. Operative findings showed that the medial head of triceps brachii shifted medially and covered the ulnar nerve. Both from computed tomography and operative findings we conjectured the possibility that tardy ulnar nerve palsy was caused because the ulnar nerve was compressed by the forward medial movement of the medial head of the triceps brachii caused by cubitus varus deformity.

Increased Carrying Angle is a Risk Factor for Nontraumatic Ulnar Neuropathy at the Elbow

“…Using a two-tailed independent sample t test, if a = 0.05 and the standard deviation of the carrying angle is estimated as 3°, for an effect of 4°, a sample size of 30 subjects would be needed to have an 80% power (b = 0.20) to detect a mean difference in carrying angles between a control standard and patient group. Based on a previous study of tardy ulnar nerve palsy caused by cubitus varus deformity [18], 34 patients were sufficient to confirm the occurrence of ulnar nerve palsy caused by cubitus varus deformity, therefore, a minimum of 30 patients would be needed. The sample (n = 36) consisted of 23 women and 13 men between 28 and 64 years of age (mean, 42.6 years).…”

“…Entrapment neuropathy of the ulnar nerve at the elbow has been reported in patients with elbow deformities, including cubitus varus after supracondylar humeral fracture [1,13,18]. One report described 15 patients with ulnar neuropathy caused by antecedent trauma with cubitus varus deformity [1] and suggested cubitus varus deformity might increase angulation of the ulnar nerve pathway at the elbow and the risk of ulnar neuropathy.…”

Three-dimensional analysis of cubitus varus deformity after supracondylar fractures of the humerus

“…1,12,18,24 Various surgical procedures have been advocated to correct the deformity, which classically includes varus, extension, and internal rotation. 8,15,20,30,34 A simple lateral closing wedge osteotomy, which corrects the varus component of the deformity, 4,28 and an anterolaterally based closing wedge osteotomy, 20,35 which corrects both varus and hyperextension, are widely performed for this condition.…”

Korrekturosteotomien suprakondylärer Fehlstellungen am Humerus

“…liegt darin, dass eine dreidimensionale Korrektur ohne Keilentnahme sowie eine zusätzliche Nachkorrektur in Narkose möglich sind. [1,7,18,19,21,23]. Die Patienten wurden nach subjektiven, klinischen und röntgenologischen Kriterien 1-9 Jahre (7,4 Jahre) postoperativ nachuntersucht.…”