Valgus instability and related factors beyond 2 years following unlinked total elbow arthroplasty.

HYPOTHESIS AND BACKGROUND: Total elbow arthroplasty (TEA), categorized into linked and unlinked types, is a commonly reported treatment for rheumatoid arthritis of the elbow. Although unlinked TEA preserves bone, it may result in instability. This study aimed to assess the outcomes of unlinked TEA in rheumatoid arthritis of the elbow beyond 2 years and to identify factors correlating with postoperative valgus instability of unlinked TEA. METHODS: This study included patients who underwent TEA for rheumatoid arthritis of the elbow at our department between August 2009 and January 2017, with a follow-up period exceeding 2 years. Elbow joint range of motion (ROM) and clinical scores were evaluated preoperatively and at the final follow-up. Factors contributing to valgus instability, such as the Larsen grade, sex, age, side, preoperative ROM, postoperative ROM, implant placement, preoperative carrying angle, and the use of biological disease-modifying antirheumatic drugs (bDMARDs), were also assessed. RESULTS: This study encompassed 26 elbows from 23 patients, with a mean patient age at surgery of 64.8 years and a mean follow-up duration of 92.4 months. Significant improvements were observed in the ROM (extension: from -31° preoperatively to -21° postoperatively [P = .02], flexion: from 116° to137° [P < .001]), Japanese Orthopaedic Association-Japan Elbow Society Elbow Function Score (from 45.9 to 86.3 points [P < .001]), and Mayo Elbow Performance Score (from 43.6 to 91.7 points [P < .001]). At the last follow-up, 2 elbows exhibited radiolucent lines around the humeral stem, whereas 7 had valgus instability. Factors correlated with valgus instability included total arc at the final follow-up, preoperative carrying angle, and the use of bDMARDs. DISCUSSION AND CONCLUSION: Unlinked TEA demonstrated favorable midterm outcomes for rheumatoid arthritis of the elbow, albeit with occasional valgus instability. Surgeons should consider preoperative carrying angle and bDMARD use, and exercise caution regarding intraoperative extensions.

Postoperative Infection Related with the Total Elbow Arthroplasty (Kudo's Prosthesis) in Rheumatoid Arthritis.

BACKGROUND: Total Elbow Arthroplasty (TEA) for the rheumatoid arthritis (RA) has been popularized since 1980s. The outcomes of TEA using any type of implant design for RA has been satisfactory. On the other hand, many orthopedicians experience several postoperative complications. Among them, postoperative infection has still being the most troublesome and difficult to treat. This study is to clarify the causes of postoperative infection of TEA using Kudo's prosthesis for RA and discuss how to manage and prevent infection. METHODS: 421 TEAs were performed for 405 cases with RA at the authors' institute during the period between 1982 and 2007. They were followed up for 1~25 years (Av. 12.3 years). The authors examined pain, the range of motion, roentgenograms and complications postoperatively. We were able to start treatment within 4 weeks after occurrence of infection. For surgical management of infected TEAs, debridement of the synovium and removal of the prosthesis with loosening were performed for all cases. In addition, all cases have been regularly and strictly followed-up with the elbow protector to prevent recurrence of infection since 2008. RESULTS: There were 98 TEAs with the postoperative complications (23.3%). Eight out of 98 TEAs were infected (1.9%). Five of eight infected TEAs were primarily at the surgical scar site infection (SSSI) (60%), unknown causes in two, hematogenous course in 1. It's obvious that surgical scar site infection (SSSI) was the leading cause of postoperative infection in this study. Thus, the authors made the elbow proctor to avoid injuries of the skin around surgical scar site (SSS). Since 2008, all of the TEAs and revised TEAs have been applied with this protector. CONCLUSIONS: The authors reported 8 infected TEAs: 5 cases were revised, 2 with the brace, 1 had above the elbow amputated. The regular and meticulous follow up and application of the elbow protector were useful to prevent infection of post-TEAs using Kudo's prosthesis in RA. Since 2008, there have been no infection of post TEAs and revised TEAs.

Posterior interosseous nerve palsy secondary to rheumatoid cyst of the elbow joint: case report.

A 73-year-old woman with rheumatoid arthritis had lost the ability to extend the digits on her right hand. A rheumatoid cyst in the elbow caused the posterior interosseous nerve palsy. Decompression was performed, and she recovered extension of the thumb and fingers completely within 3 weeks after the operation.

A total wrist arthroplasty in rheumatoid arthritis: a case followed for 24 years.

Abstract We report a case of rheumatoid arthritis treated with a total wrist arthroplasty. A Meuli-type total wrist arthroplasty was performed on the left wrist in 1979. We have treated the patient's rheumatoid arthritis with disease-modifying antirheumatic drugs (DMARDs) (Actarit 100 mg and Mijoribine 50 mg) and nonsteroidal anti-inflammatory drugs (NSAIDs) for a total of 26 years before and after the total wrist arthroplasty. The activity of the rheumatoid arthritis has been kept at a low level. The operated wrist was followed up for 24 years postoperatively. It is thought that the antirheumatic treatments over a long period have been very successful in preventing the destruction of the operated wrist.