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Results for “Elbow Prosthesis”

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At least 343 records · Page 19Linked to original sources
PubMed1986

[Isolated venous aneurysms].

The author has observed 9 patients with isolated aneurysms of the neck and extremity veins. Clinical manifestations of the disease, diagnosis and surgical methods of treatment are described.

Adolescent↗
PubMed1979

Total joint arthroplasty. The elbow.

The first total elbow arthroplasty at the Mayo Clinic was performed in 1972, and it provided markedly superior results compared with previously performed procedures for elbow arthritis. However, a high revision rate (14%), due mainly to loosening (75%), tempered early enthusiasm for the procedure. Prospects for improved design and surgical technique based on our clinical experience and biomechanical data are encouraging. For the present, however, more limited procedures are recommended, and the total elbow arthroplasty is reserved for only a relatively few patients for whom there are no other viable surgical options.

Arthritis↗
PubMed1983

Surgery of the elbow joint in rheumatoid arthritis.

A review is made of the literature of the mechanics of the elbow joint and the types of operations available. It is clear that the elbow is a complex joint and that in patients with rheumatoid arthritis destruction and disability occurs relatively late in the disease. Of the operations available, synovectomy and excision of the radial head are best done early in order to obtain the movement of supination and pronation. Total elbow replacement, particularly the unconstrained type is producing encouraging results and seems rational in view of the structure of the elbow. However it is early days in the design of these prostheses and the clear message is that the patients need full assessment in the light of their other joints involved.

Arthritis, Rheumatoid↗
PubMed1978

Instantaneous center of rotation by least square method.

In the design of the total replacement of the human joint, the joint center of rotation is often important. This paper describes an analytical technique to study joint kinematics, especially the instantaneous center of rotation. The empirical data for the analysis were obtained by the sonic digitizer system which works acoustically and electronically. As biomechanical applications of the technique, the elbow, the metacarpophalangeal, and wrist joints were studied.

Biomechanical Phenomena↗
PubMed1982

Extensive posterior exposure of the elbow. A triceps-sparing approach.

Difficulty with triceps avulsion or loss of continuity after total elbow arthroplasty has prompted the development of a modified posterior approach to the elbow joint. The characteristic feature of this approach is that the triceps mechanism is reflected from medial to lateral in continuity with the forearm fascia and the olecranon and ulnar periosteum. A variant of the technique reflects the extensor mechanism from lateral to medial. The ulnar collateral ligament may be released from the humerus to provide more exposure, but the ligament must then be securely reattached. This approach, which provides extensive exposure to the elbow joint, has been employed in 49 consecutive total elbow arthroplasties and results show no loss of triceps function and no significant weakness. The approach has proved useful for treatment of intra-articular fractures of the distal end of the humerus and with synovectomy in the rheumatoid arthritic patient.

Elbow Joint↗
PubMed1982

Complications of total elbow arthroplasty.

The need for revision surgery for loosening exceeds 25% with tightly constrained prostheses but is much less with the semiconstrained designs. Resurfacing prostheses may be unstable if not adequately balanced by static and dynamic soft-tissue constraints. Infection is excessive (4%-9%), but resection arthroplasty is a reasonably good salvage procedure. Implant failure is rare. The ulnar nerve is subject to transient (10%) or, occasionally, partial dysfunction. Routine anterior translocation has been beneficial, but there is considerable variation in technique in this regard. Triceps insufficiency can be virtually eliminated with the Kocher lateral-to-medial or the Bryan lateral-to-medial triceps-sparing approach. Fractures of the ulna usually can be treated by cast application, but humeral fractures may require revision surgery because of component loosening. Some complications are decreasing in frequency, whereas others are becoming more widely appreciated. The procedure remains a challenging one, and is one that should be performed by those who are experienced in elbow surgery and who have a detailed knowledge of the numerous potential pitfalls.

Elbow Joint↗
PubMed1982

Revision surgery following a failed total elbow arthroplasty.

The need for revision surgery following total elbow arthroplasty can be minimized if certain principles are observed. These include careful preoperative assessment for diaphyseal bone size, the presence of anatomic resources for arthroplasty, the possible need for future adjacent joint arthroplasties, meticulous surgical detail during the arthroplasty, and prompt diagnosis and correction of postoperative problems. Many of the problems following total elbow arthroplasty can be surgically corrected by replacing the high-density polyethylene bearing. Other problems are amenable to arthrodesis of the joint. Although the complication rate and need for revision surgery have diminished with improved implant design and improved surgical technology, it is helpful both to the patient and to the surgeon to discuss the potential problems and the risk versus gain ratio with the patient so that a clear understanding of the reconstruction is understood by everyone.

Elbow Joint↗