PubMed Health⌕ Search

PubMed · 3050784

[Congenital changes in the elbow joint].

Abstract

Radio-ulnar synostosis is one of the congenital malformations of the elbow joint that can be severely disabling, especially if it is present bilaterally or there is marked hyperpronation. In the case of fixed pronation of 60 degrees or more corrective surgery is definitely indicated to reduce functional impairment. As yet, there is no standard operative procedure for restoration of useful supination/pronation function of the forearm. Derotational osteotomy at the site of synostosis seems to be the best procedure. As the postoperative aim we recommend fixed pronation at 15 degrees -35 degrees for the dominant hand and fixed supination at 15 degrees -30 degrees for the contralateral hand. Major derotational procedures should be performed in several stages to avoid neurovascular complications.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

U Banniza von Bazan, L Jani. 1988. [Congenital changes in the elbow joint].. https://pubmed.ncbi.nlm.nih.gov/3050784/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

A model of open-loop control of equilibrium position and stiffness of the human elbow joint.

According to the equilibrium point theory, the control of posture and movement involves the setting of equilibrium joint positions (EP) and the independent modulation of stiffness. One model of EP control, the alpha-model, posits that stable EPs and stiffness are set open-loop, i.e. without the aid of feedback. The purpose of the present study was to explore for the elbow joint the range over which stable EPs can be set open-loop and to investigate the effect of co-contraction on intrinsic low-frequency elbow joint stiffness (K (ilf)). For this purpose, a model of the upper and lower arm was constructed, equipped with Hill-type muscles. At a constant neural input, the isometric force of the contractile element of the muscles depended on both the myofilamentary overlap and the effect of sarcomere length on the sensitivity of myofilaments to [Ca2+] (LDCS). The musculoskeletal model, for which the parameters were chosen carefully on the basis of physiological literature, captured the salient isometric properties of the muscles spanning the elbow joint. It was found that stable open-loop EPs could be achieved over the whole range of motion of the elbow joint and that K (ilf), which ranged from 18 to 42 N m.rad(-1), could be independently controlled. In the model, LDCS contributed substantially to K (ilf) (up to 25 N m.rad(-1)) and caused K (ilf) to peak at a sub-maximal level of co-contraction.

Elbow Joint↗

[Bipolar dislocation injury of the forearm].

Bipolar dislocation injury of the forearm is rarely documented. It is a combined forearm injury with trauma on the elbow side and on the side of the wrist joint. We describe two different cases of this complex dislocation. The first patient suffered from a Monteggia-like dislocation fracture with transscaphoid dislocation of the wrist. The second person had an acute longitudinal radioulnar membrane dissociation after elbow dislocation with an additional scapholunate tendon rupture. The difficult management of these injuries is illustrated by these cases.

Elbow Joint↗