Successful closed manipulation of a pure lateral traumatic dislocation of the elbow joint using a modified Stimson's technique: a case report
© Khan et al; licensee BioMed Central Ltd. 2008
Received: 06 November 2007
Accepted: 22 May 2008
Published: 22 May 2008
Pure lateral elbow dislocation is rare, and a successful closed reduction is even rarer. Reduction can be hindered by swelling, soft tissue interposition or associated fractures.
We present a pure lateral traumatic dislocation of the elbow joint in a 40-year-old man. This was successfully manipulated and reduced in casualty using a modification of the gravity-aided 'hanging arm' technique originally described for shoulder dislocations by Stimson.
We strongly recommend the use of this simple technique in these rare yet difficult injuries, in order to avoid potential complications with general anaesthesia and surgery.
Pure lateral elbow dislocation is rare, and a successful closed reduction is even rarer. Reduction can be hindered by swelling, soft tissue interposition or associated fractures. The elbow dislocation of the case we present here was irreducible by conventional methods, so we adapted a modification of a historical method to successfully reduce it. A historical review is discussed subsequently. To the best of our knowledge, this is the first reported application of this particular technique for this rare injury.
A closed reduction was attempted under light sedation by the casualty registrar using conventional methods, but proved unsuccessful. The patient was re-examined by the orthopaedic team and was placed prone with the affected left arm hanging by the edge of the bed. Ten minutes later, with the patient still sedated, the elbow was first disimpacted by applying longitudinal traction on the forearm with counter-traction on the arm. It was then enlocated applying gentle medial pressure on the olecranon. Valgus and varus instability of the elbow was checked in full extension and 30° of flexion. Normal sensation returned spontaneously in the ulnar nerve distribution.
Stimson  originally described his 'hanging arm' technique for reducing shoulder dislocations. This method consisted of the patient lying prone in a canvas cot, with the affected arm hanging through a hole in the canvas. Weights were then placed in the dependent hand, and reduction occurred due to the synergistic effect of muscle relaxation and gravity. Rollinson  modified this technique by hanging the affected arm over the side of the bed. Also, instead of applying weights he used a supraclavicular brachial nerve block to relieve pain and evoke muscle relaxation.
Levine  described reduction of an elbow dislocation by seating the patient in a chair, with the arm dangling over the back of the chair. This however required co-operation from the patient, which can be difficult in certain circumstances. Parwin  has employed a technique similar to Stimson's, consisting of prone positioning, traction at the wrist, and elevation of the humerus to produce reduction. Meyn and Quigley  improved on this by grasping the olecranon with the operator's other hand, and guiding it into place. Prone positioning and gravity-aided traction has also been used successfully by Minford and Beattie . All of these techniques have been employed to reduce posterior dislocations, contrary to the pure lateral in this case. Our technique also differs in requiring two persons to manipulate, as we feel that guiding the olecranon in a purely medial direction requires both hands from the main operator, with the assistant constantly applying counter-traction. The ease of reduction justifies the use of an additional pair of hands.
Simple lateral dislocations should theoretically be amenable to closed manipulation, as documented by Vijaya  in his case report. However, reduction can be impeded by fractured articular fragments or interposed muscle. Exarchou  found the anconeus muscle interposed between the articular surfaces and preventing reduction. Vaidya  has documented the brachialis muscle and a coronoid chip fracture to be the causes of the irreducibility in their patient. Both these cases required open reduction and stabilisation.
Pure lateral elbow dislocation is rare, and a successful closed reduction is even rarer. The reduction can prove difficult, even under general anaesthesia, due to swelling, soft tissue interposition or associated fractures. We have adapted a modification of Stimson's original method to reduce a purely lateral elbow dislocation. Such an atraumatic and mechanically simple technique can prove very useful in a busy casualty department. It also avoids potential complications with general anaesthesia and surgery, while giving an anatomically congruent reduction.
Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
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