Background and purpose — Cognitive task analysis (CTA) has been used extensively to train pilots and in other surgical specialties. However, the use of CTA within orthopedics is in its infancy. We evaluated the effectiveness of a novel CTA tool to improve understanding of the procedural steps in antegrade femoral intramedullary nailing.Material and methods — Design: A modified Delphi technique was used to generate a CTA from 3 expert orthopedic trauma surgeons for antegrade femoral intramedullary nailing. The written and audiovisual information was combined to describe the technical steps, decision points, and errors for each phase of this procedure Validation: A randomized double-blind controlled trial was undertaken with 22 medical students (novices) randomized into 2 equal groups. The intervention group were given the CTA tool and the control group were given a standard operative technique manual. They were assessed using the validated “Touch Surgery™” application assessment tool on femoral intramedullary nailing.Results — The pre-test scores between the two groups were similar. However, the post-test scores were statistically significantly better in the intervention group compared with the control group. The improvement (post-test median scores) in the intervention group compared with the control group was 20% for patient positioning and preparation, 21% for femoral preparation, 10% for proximal locking, and 19% for distal locking respectively (p < 0.001 for all comparisons).Interpretation — This is the first multimedia CTA tool in femoral intramedullary nailing that is easily accessible, user-friendly, and has demonstrated significant benefits in training novices over the traditional use of operative technique manuals.
Purpose To determine the preferred knee in patients with both one total and one unicompartmental knee arthroplasty. Method Patients simply with a unicompartmental (UKA) and total knee arthroplasty (TKA) on contralateral sides were retrospectively screened from three senior knee surgeon's logs over a 15 year period. Patients safe and free from other diseases to affect gait were approached. A total of 16 patients (mean age 70 ± 8) agreed to ground reaction force testing on an instrumented treadmill at a fair pace and incline. A gender-ratio identical group of 16 healthy control subjects (mean age 67 ± 10) and 16 patients with ipsilateral medial knee OA (mean age 66 ± 7) were analysed to compare. Results Radiographically the mode preoperative Kellgren-Lawrence knee grade for each side was 3. Postoperatively, the TKA side had a mean coronal femoral component alignment of 7° and a mean tibial coronal alignment of 89° with a mean posterior slope of 5° in the sagittal plane. The UKA side had a mean coronal femoral component alignment of 7° and a mean tibial coronal alignment of 86° with a mean posterior slope of 4° in the sagittal plane. In 7 patients, the TKA was the first procedure, while 6 for the UKA and 3 done simultaneously. Gait analysis demonstrated in both walking conditions the UKA limb was the preferred side through all phases of loading (p < 0.05) and nearer to normal than the TKA limb when compared to healthy controls and patients with knee OA. The greatest difference was observed between the transition of weight acceptance and midstance (p = 0.008), when 22% more load was taken by the UKA side. Conclusion By using a dynamic metric of an everyday activity, a distinct gait difference between differing arthroplasty types were established. A more natural loading pattern can be achieved with unicompartmentals as compared to total knees. Level of evidence Retrospective comparative study, Level III.
To evaluate the outcome of a fibular nail in the treatment of open and closed unstable ankle fractures in a nondesigner centre. Methods: In a retrospective cohort study, a total of 39 ankle fractures (14 open and 25 closed) treated with a locking fibular nail were evaluated between 2012 and 2015 in a non-designer level I major trauma centre. Postoperative radiographs were analysed to assess the quality of reduction (McLennan and Ungersma marking system), fracture union and complications. Three patient reported outcome scores (Olerud and Molander score (OMAS), American Association of Orthopaedic Surgeons (AAOS) foot and ankle score and 12-Item Short Form Survey (SF-12)) were collected to obtain an overall measure of the patient's physical and mental outcome. Results: The adequacy of reduction data was available for 38 of 39 cases; 33 (87%) achieved good, 3 (8%) fair and 2 (5%) poor ratings, based on the McLennan and Ungersma marking system. Thirty-five (12 open and 23 closed) patients were available for initial follow-up. Five (14.3%) of 35 had documented complications (2 of 12 in the open cohort and 3 of 23 in the closed cohort). All fibular fractures treated with the fibular nail went on to unite. Twenty-three (66%) of 35 patients were available at 1-year followup for measurement of objective outcome. The combined mean OMAS for both groups was 53.7 (0-85) with statistically better results (59.5 (25-85) vs. 37.3 (0-75)) in favour of the closed versus open injuries, respectively. The mean AAOS score was also statistically better for the closed group than the open, 70.3 (30-95) versus 46.6 (20-77), respectively. The mean SF-12 score (physical component) was 40 (21.6-52.4) in the closed group versus 36.1 (19.4-51.5) in the open group; the mean mental component was 42.5 (26.6-54.3) in the closed group versus 38.8 (28.4-60.5) in the open group, these however were not statistically different. Conclusion: Fibular nails are an effective alternative for the treatment for both closed and open unstable ankle fractures with soft tissue compromise.
Aim: To compare the incidence of surgical site infection with different antibiotic regimes in elective total knee arthroplasty. We hypothesise that a single high dose of Teicoplanin and Gentamicin is as effective as other regimes. Methods: A retrospective study of prospectively collected data on a total of 4500 elective knee replacements over a 9-year period was conducted in a district general hospital. Data were collected on antibiotic regime, patient characteristics, infection (treatment, infective agents, sensitivities) and complications. Results: Five different antibiotic regimes that have been used in elective knee arthroplasty were identified in our institution. 40 patients in total were identified who had a deep infection. Rates of deep surgical site infection were not significantly different between the five groups (p ¼ 0.83). Conclusion:A single pre-operative dose of Teicoplanin and Gentamicin has similar efficacy of prophylaxis to other regimes for patients undergoing primary elective total knee replacements. We recommend the choice of prophylaxis regimen is made locally based on pathogen virulence, drug resistance and cost.
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