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At least 505 records · Page 28Linked to original sources
PubMed2004

Snowmobile trauma: 10 years' experience at Manitoba's tertiary trauma centre.

INTRODUCTION: According to the literature, the increased recreational use of the snowmobile has resulted in an increasing number of musculoskeletal injuries. We wished to examine whether previously described risk factors continue to be associated with snowmobile trauma and to identify previously unrecognized risks and specific patterns of injury. METHODS: We carried out a chart review of all snowmobile-related injuries over a 10-year period at the Health Sciences Centre in Winnipeg, the only level 1 trauma centre serving the Province of Manitoba, with particular attention to the risk factors of suboptimal lighting, excessive speed and alcohol consumption. RESULTS: We identified 480 injuries in 294 patients, and 81 (27.6%) of these patients died. Collisions accounted for 72% of the injury mechanisms. Of the injuries sustained, 31% occurred on roads. Excessive speed was a risk factor in 54% of patients, suboptimal lighting in 86% and a blood alcohol level greater than 0.08 in 70%. Musculoskeletal injuries accounted for 57% of those recorded. There were also brachial plexus injuries (3%) and knee dislocations (2%). To our knowledge, this is the largest study detailing injury associated with recreational use of snowmobiles in Canada. CONCLUSIONS: Because snowmobile trauma is caused principally by human errors, it is potentially preventable. Efforts aimed at prevention must focus on the driver, who controls the common risk factors. The danger of snowmobiling while intoxicated must be emphasized. Trail-side monitoring is likely to be ineffective, as the majority of accidents do not occur on designated snowmobile trails.

Adult↗
PubMed2006

Associations between joint space narrowing and molecular markers of collagen and proteoglycan turnover in patients with knee osteoarthritis.

OBJECTIVE: We examined whether plasma concentrations of biomarkers of the collagenase cleavage of type II collagen (C2C), types I and II collagens (C1,2C), type II collagen synthesis (CPII), proteoglycan aggrecan turnover (CS846), and the ratio C2C:CPII would distinguish subjects with progressive radiographic osteoarthritis (OA) from those with stable disease. METHODS: Subjects were 120 obese middle-aged women with unilateral knee OA who participated in a 30-month clinical trial of structure modification with doxycycline, in which a standardized semiflexed anteroposterior view of the knee was obtained at baseline, 16 months, and 30 months. Subjects were selected from a larger sample to permit a priori comparisons between 60 OA progressors and 60 nonprogressors, as defined by joint space narrowing (JSN) in the medial tibiofemoral compartment. Each group contained 30 subjects who exhibited clinically significant increases in knee pain over 30 months and 30 who did not. Plasma samples were obtained every 6 months for determination of C2C, CPII, CS846, and C1,2C. RESULTS: None of the biomarkers was a significant predictor of progression of JSN. Over the interval from baseline to 16 months, the mean and the maximum of the intercurrent CS846 values were significantly associated with JSN (i.e., 0.12-0.14 mm of JSN per SD decrease in mean or maximum CS846; p < 0.01). The mean of serial CS846 levels was related to JSN also during the interval between months 16 and 30. CONCLUSION: Markers of type II collagen synthesis/degradation and of proteoglycan aggrecan turnover were not predictive of JSN in knee OA in this pilot study. However, serial concentrations of proteoglycan aggrecan epitope CS846 were associated with JSN during both the intervals studied.

Anti-Bacterial Agents↗
PubMed2006

Importance of a balanced-gap technique in rotating-platform knees.

Rotating-platform knees are constructed of highly conforming polyethylene to reduce contact pressures that potentially cause wear. The mobile nature of the rotating platform can lead to bearing spin-out. The purpose of this study was to determine the prevalence of spin-out in a single series. A total of 426 knees in 393 patients were included in the study. All knees were implanted using a balanced-gap technique. The average follow up was 3.2 years. There were no cases of bearing spin-out. The author concludes that the balanced-gap technique reliably prevents spin-out in mobile-bearing total knee implantation. This implantation technique provides the potential wear benefits of the rotating platform design with a nominal bearing spin-out rate.

Adult↗
PubMed2006

Surgical technique tips and pearls in rotating-platform knee arthroplasty.

Rotating-platform mobile-bearing knee arthroplasties have potential advantages over fixed-bearing knee prostheses that may lead to better long-term wear of the polyethylene articulation. Their potential disadvantages include bearing spin-out that is usually the result of a tight posterior cruciate ligament in need of release. The "slide-back test" can help determine this need during placement of the trial components. Clearing polymerized cement from the back of the knee can be difficult during rotating-platform knee arthroplasty unless cementing is completed using a trial tibial insert without a stem. Exchanging a rotating-platform insert at a future arthrotomy can be facilitated by the use of a shim that provides exposure to the polyethylene tibial post that articulates within the stem of the tibial tray. Severing the post allows extraction of the polyethylene plateau and access to the post within the tray.

Arthroplasty, Replacement, Knee↗
PubMedDate not supplied

Results of femoral lengthening using the Ilizarov technique.

We report the results of 36 femoral lengthenings in 30 consecutive patients using the Ilizarov technique. Patient age at surgery in 19 boys and 11 girls averaged 13.4 years (range, 5-18). Minimum follow-up was 2 years. The etiology of femoral shortening was congenital in 21 femora and acquired in 15. Twelve femora underwent concomitant correction of associated angular deformities during treatment. The average lengthening was 8.3 cm (range, 3.5-12 cm) with a treatment time of 6.4 months (range, 2.5-12). The mean number of surgeries per patient was 2.3, including apparatus application and removal. Lengthening index (months of treatment/centimeter lengthening) was 0.74. Complications included premature consolidation in four patients, malunion of > 10 degrees in two patients, and residual limb length inequality (< 2 cm) in two. There were two instances of knee subluxation [corrected]. No osteomyelitis, ring sequestra, neurologic or vascular compromise, compartment syndrome, hypertension, or hip or knee dislocations occurred. Psychological problems necessitated cessation of lengthening in two patients. These results show a significant improvement over previous reports of earlier techniques of femoral lengthening in terms of greater lengthening, simultaneous deformity correction, and fewer major complications.

Adolescent↗