Return to work following total knee arthroplasty: A multiple case study of stakeholder perspectives.

OBJECTIVE: The study's aim was to gain insights into factors influencing sustainable return to work following total knee arthroplasty (TKA). DESIGN: A descriptive multiple-case design was used. A case was defined as a worker's following TKA work disability situation. SETTINGS: The cases came from public hospitals in urban and semi-urban areas in Quebec (Canada) and involved mostly non-work-related TKAs. SUBJECTS: Workers had to be between 6 and 12 months post-TKA, have physical/manual jobs and currently employed. Their rehabilitation professionals and workplace representatives (employer and/or union) were also recruited, based on the work disability paradigm. MAIN MEASURES: Semi-structured interviews, questionnaires on pain, physical work demands (workers only), and observation of the work activities of those workers back at work were used. Cases were compared and categorized for worker-perceived levels of difficulty in returning to or staying at work: little or no difficulty (n = 8); some difficulty (n = 5); not back at work due to excessive difficulty with their knee (n = 4). RESULTS: A total of 17 cases were constituted. In only one case, the worker benefitted from an interdisciplinary work rehabilitation approach. Results highlight the interplay among these factors: (1) the workers' perceptions of their residual symptoms and ability to manage them, (2) the interaction between work adjustments and tools offered by the employers and the workers' own strategies, and (3) perceptions of the workers' physical capacities. CONCLUSION: Workers' who face high levels of work demands/difficulties and who have limited access to work adjustments and tools should be referred for work rehabilitation.

Surgical management of sternoclavicular joint infection.

OBJECTIVE: Sternoclavicular joint (SCJ) infections are rarely encountered and their management is not well standardised. We reviewed our experience with the management of this condition in order to evaluate the role of surgery in the management of the SCJ infection and to provide an algorithm for its treatment. METHODS: It is a multicentre study in which we retrospectively reviewed the data files of the patients who were referred to us for surgical management of SCI infection. RESULTS: From March 2003 to June 2009, 14 patients (12 men and two women) were treated surgically for infected SCJ. No patients were found in the paediatric age group. Mean age was 49.8 years with a range between 26 and 77 years. All patients were symptomatic. The prevalent symptom was either anterior chest wall swelling (21%) or pain (29%); while 50% of them presented with both swelling and pain. Associated risk factors were elicited in 12 patients (86%) while it could not be identified in two patients (14%). These risk factors were in the form of drug addiction in three patients, diabetes mellitus (DM) in four, chronic renal failure (CRF) in three patients and two patients had both DM and CRF. Surgical management was performed in all patients in the form of either incision and drainage in two patients (14%); or SCJ curettage in three patients (21%), while resection of the SCJ was done in nine patients (62%). Mean postoperative hospital stay period (PHS) was 8.1 days (range: 5-30 days). All of them are alive and free of symptoms in follow-up. CONCLUSION: Surgery was found to be curative with good results for those patients with SCJ infection that did not respond to a full course of intravenous antibiotic therapy. Surgical options include incision and drainage, curettage or SCJ resection. The type of surgical procedure depends on the radiological findings, presentation, severity of the infection and intra-operative findings. In our experience, complex muscle flap reconstruction was not necessary following SCJ resection.

Metatarsal bars more effective than metatarsal pads in reducing impulse on the second metatarsal head.

BACKGROUND: The second metatarsal head is commonly involved in cases of metatarsalgia. As part of the conservative treatment, metatarsal bars and metatarsal pads are often prescribed. OBJECTIVE: To compare the effectiveness of metatarsal bars and metatarsal pads in reducing impulse on the second metatarsal head. METHOD: Thirty-five healthy subjects were monitored with an insole scanning system during walking in four different conditions: (a) wearing shoes only, (b) shoes plus metatarsal pads and shoes plus metatarsal bars, placed either (c) perpendicular to the foot axis or (d) oblique to the foot axis. The impulse under the second metatarsal head was measured using the first condition as a control. Both feet were examined in each subject resulting in a total of 840 measurements. RESULTS: Both metatarsal bars and metatarsal pads were effective in reducing impulse when compared with the control (P<0.01). Metatarsal bars were found to be more effective in reducing impulse as compared to the metatarsal pads (P<0.01), and the oblique position of the bars was more effective than the perpendicular one (P<0.01). CONCLUSIONS: The greatest reduction of impulse on the second metatarsal head in healthy subjects is achieved with the use of metatarsal bars in an oblique position.

Radionuclide arthrogram with SPECT/CT for the evaluation of mechanical loosening of hip and knee prostheses.

OBJECTIVE: To evaluate the value of SPECT/CT in radionuclide arthrogram (RNA) for the assessment of mechanical loosening of hip and knee prostheses. METHOD: A retrospective audit of 117 RNA SPECT/CTs evaluated by a single reader--40 hips, (1 hemiarthroplasty) and 77 knees (12 unicompartmental). The detection of any radiotracer within the bone/prosthetic interface was deemed positive for loosening. The operative assessment of 29 hip and 44 knee prosthetic joints was known and used as the gold standard. A subsequent blinded reassessment of the planar images was performed and compared with the SPECT/CT results for 26 of the 29 hip and 42 of the 44 knee prostheses. RESULTS: The respective SPECT/CT versus planar results were as follows: hips--acetabular cup: sensitivity: 73 versus 0%; specificity: 71 versus 100%; positive predictive value: 62% versus indeterminate; negative predictive value: 80% versus 72% (p = 0.0044). Hips--femoral component: sensitivity: 78 versus 63%; specificity: 90 versus 94%; positive predictive value: 78 versus 83%; negative predictive value: 90 versus 85% (p = 0.2482). Knees--femoral component: sensitivity: 75 versus 17%; specificity 63 versus 97%; positive predictive value: 43 versus 67%; negative predictive value: 87 versus 74% (p = 0.0001). Knees--tibial component: sensitivity: 86 versus 63%; specificity: 86 versus 76%; positive predictive value: 55 versus 38%; negative predictive value: 97 versus 90% (p = 0.6831). CONCLUSION: For evaluation of mechanical loosening of the hip prosthesis SPECT/CT was significantly better than planar scanning for the acetabular cup, but not for the femoral stem. For evaluation of the knee prosthesis, a significant improvement was noted using SPECT/CT for the femoral component, and although superior results were also noted for the tibial component, statistical significance was not reached. Taking into account the limitations of this retrospective audit, the value of using RNA SPECT/CT appeared to lie in the exclusion of mechanical loosening.