Development and validation of the disease-specific QOL-CD quality of life questionnaire for patients with Cushing's disease.

OBJECTIVE: Cushing's disease (CD) patients experience a range of debilitating symptoms that impair quality of life (QOL) as assessed using generic measures. These generic measures are inadequate to capture the disease-specific burden of illness. The development of the CD-specific QOL-CD measure of QOL using items generated by CD patients and healthcare professionals will provide a holistic assessment of patient outcomes and efficacy of novel therapies. METHODS: A total of 96 CD patients participated. A list of 177 items (version 1.0) was generated by treated CD patients (n = 9), caregivers (n = 2), healthcare providers (n = 7), and results of a MEDLINE search. Item reduction was performed through content analysis and dual scaling. Patients' rating of importance was incorporated to reduce to a final version of 56 items (version 3.0). Evidence for test-retest reliability was sought through administering the QOL-CD 1 week apart and Cronbach's α of each subscale. Construct validity was assessed through extreme group analysis and comparison with the normal Canadian population. Concurrent validity was sought through comparison with the SF-36, Functional Assessment of Cancer Therapy-Brain (FACT-Br), and Karnofsky Performance Status (KPS). Perioperative testing was conducted on CD patients (n = 25) against nonfunctioning pituitary adenoma controls (n = 25) through pre- and postoperative testing. RESULTS: A total of 96 CD patients (86 females and 10 males; mean age 45.23 ± 14.16 years) participated. The QOL-CD was feasible (mean completion time 15 minutes, with 70% believing accurate capture of QOL), reliable (CD 1 week apart: r = 0.86; control 1 week apart: r = 0.83; Cronbach's α: general health = 0.73, emotional health = 0.85, physical health = 0.78, mental status = 0.82, social well-being = 0.63, medical treatment = 0.54), and valid (extreme group testing p < 0.001; SF-36 and QOL-CD general health: r = 0.56, social well-being: r = 0.21, emotional health: r = 0.61, total score: r = 0.58; FACT-Br and QOL-CD physical health: r = 0.47, social well-being: r = 0.21, emotional health: r = 0.34, total score: r = 0.68; KPS and QOL-CD general health: r = 0.32, total score: r = 0.14). Perioperative testing of CD patients (n = 25) demonstrated improvement in all subscales postoperatively, with a significant difference in emotional health (p < 0.001) and physical health (p < 0.001). CONCLUSIONS: The QOL-CD questionnaire has been developed for patients with CD and has demonstrated evidence for validity and reliability.

Incidence of osteolysis in total knee arthroplasty: comparison between radiographic and retrieval analysis.

Detection of polyethylene wear and osteolysis in total knee arthroplasty using radiographs is imprecise. To correlate radiographic findings with retrieved tibial component analysis, we reviewed knee revision cases. A joint registry was used to identify all knee revisions. Radiographic scoring systems were developed. Radiographs were analyzed for osteolysis and implant alignment. Polyethylene liner retrievals were visually and optically graded for surface damage. Statistical analyses that included correlation analysis and Mann-Whitney U test were used. When osteolysis was found, radiographic scores and delamination score were significantly higher (P = .047 and P = .014, respectively). Delamination is a good indicator for polyethylene wear and osteolysis. There is a need to develop in vivo methods to identify polyethylene changes and thereby prevent severe clinical outcomes.

Technical pearls for hip arthroscopy in the management of synovial chondromatosis.

Synovial chondromatosis of the hip is often underdiagnosed. A high index of suspicion and good quality imaging studies are therefore essential. A wide array of long and curved instrumentation is needed at surgery. Efficient use of time and an organized surgical approach are critical to decrease joint distraction time and potential complications. A successful outcome, with pain relief and return of joint function and range of motion, is predicated on incremental follow-up.

Efficacy of hip arthroscopy in the management of synovial chondromatosis.

BACKGROUND: Synovial chondromatosis can result in intra-articular loose bodies. Open arthrotomy has been the conventional treatment for this condition in the hip. Hip arthroscopy, however, is a minimally invasive approach and avoids potential problems with open arthrotomy. PURPOSE: This series was described to evaluate the role of arthroscopy in treatment and outcome of synovial chondromatosis of the hip at early to intermediate follow-up. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Twenty-nine patients had arthroscopic treatment for synovial chondromatosis of the hip. All loose bodies were intracapsular and smaller than 10 mm. Radiographs of the painful hip, computed tomography (CT), and gadolinium-enhanced magnetic resonance imaging (MRI) were obtained preoperatively. Intraoperatively, loose bodies were removed, and partial synovectomy, partial labrectomy, chondroplasty, and microfracture were done as needed. RESULTS: There were 14 women and 15 men (mean age, 41 years; mean duration of symptoms, 52 months). All patients had hip pain and 63% reported mechanical hip symptoms. Twenty-three patients were followed for at least 12 months (mean, 64 months). Loose bodies could be seen in the imaging studies of 52% of patients: 8 on radiographs and 7 with CT or gadolinium-enhanced MRI. At surgery, 23 of the 29 (79%) patients had torn labra and femoral head changes. There were an average of 35 loose bodies per patient. Twenty-five of the 29 (86%) had acetabular chondral findings. Five of the 29 patients (17%) eventually underwent total hip reconstruction surgery at a mean of 52 months; 5 of these patients had grade III/IV lesions at the time of arthroscopy. Eleven of the 23 patients (48%) had good to excellent outcomes at an average of 60 months. Recurrent symptoms were seen in 7 patients, and revision arthroscopy was done for 1 patient at 1-year follow-up, 2 patients at 4 years, 1 at 5 years, and 1 at 7-year follow-up. Complications included transient perineal and pedal paresthesia in 2 patients. CONCLUSION: Patients with synovial chondromatosis with hip central compartment loose bodies that were less than 10 mm benefited from hip arthroscopy. Imaging studies alone failed to establish the diagnosis in 14 of 29 patients (48%). Diagnosis was made by direct visualization via arthroscopy. For patients with grade I/II cartilage change, early diagnosis and treatment via arthroscopy helped. It is a valid and effective treatment at early to intermediate follow-up.

Treatment of a well-fixed modular fully porous coated stem after fracture using a custom rescue sleeve.

We report a novel technique for the treatment of a fractured fully porous-coated modular stem. The fracture of the stem occurred at the taper of the stem-body junction. In both cases, the stem was well-fixed distally making the reconstruction difficult. Previously, authors have reported the use of an extended trochanteric osteotomy or multiple cortical windows for removal of this type of prosthesis. The technique we describe uses a custom-made "rescue sleeve" that takes advantage of the distal ingrowth. The rescue sleeve is fitted onto the existing stem obviating the need for an extended trochanteric osteotomy. The rescue sleeve's geometry makes up for the loss in height and accepts the modular body components to give the surgeon the length options to optimize stability.

A modified surgical technique for reconstruction of an acute acromioclavicular joint dislocation.

We report a modified surgical technique for reconstruction of coracoclavicular and acromioclavicular ligaments after acute dislocation of acromioclavicular joint using suture anchors. We have repaired 3 consecutive type III acromioclavicular dislocations with good results. This technique is simple and safe and allows anatomical reconstruction of the ligaments in acute dislocations.

Computer navigation in total hip replacement: a meta-analysis.

Proponents of navigated hip arthroplasty have suggested that it may increase the precision of acetabular component placement. We conducted a systematic review and meta-analysis to evaluate the validity of this theory. We searched, in duplicate, MEDLINE, EMBASE and the Cochrane Central Register of Controlled Trials for randomised trials comparing the use of computer navigation with the freehand technique for acetabular cup placement within the desired alignment. We assessed the methodological quality of the studies and abstracted the relevant data. Tests of heterogeneity and publication bias were performed. From the three studies included, there was no evidence of heterogeneity between studies. A total of 250 patients were entered into the analysis. The beneficial odds ratio for the number of outliers was 0.285 (95% confidence interval [CI]: 0.143 to 0.569; p < 0.001). We conclude that navigation in hip arthroplasty improves the precision of acetabular cup placement by decreasing the number of outliers from the desired alignment.