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1.
Article in English | MEDLINE | ID: mdl-36900804

ABSTRACT

(1) Background: Inpatient falls are a major cause of hospital-acquired complications (HAC) and inpatient harm. Interventions to prevent falls exist, but it is unclear which are most effective and what implementation strategies best support their use. This study uses existing implementation theory to develop an implementation enhancement plan to improve the uptake of a digital fall prevention workflow. (2) Methods: A qualitative approach using focus groups/interview included 12 participants across four inpatient wards, from a newly built, 300-bed rural referral hospital. Interviews were coded to the Consolidated Framework for Implementation Research (CFIR) and then converted to barrier and enabler statements using consensus agreement. Barriers and enablers were mapped to the Expert Recommendations for Implementing Change (ERIC) tool to develop an implementation enhancement plan. (3) Results: The most prevalent CFIR enablers included: relative advantage (n = 12), access to knowledge and information (n = 11), leadership engagement (n = 9), patient needs and resources (n = 8), cosmopolitanism (n = 5), knowledge and beliefs about the intervention (n = 5), self-efficacy (n = 5) and formally appointed internal implementation leaders (n = 5). Commonly mentioned CFIR barriers included: access to knowledge and information (n = 11), available resources (n = 8), compatibility (n = 8), patient needs and resources (n = 8), design quality and packaging (n = 10), adaptability (n = 7) and executing (n = 7). After mapping the CFIR enablers and barriers to the ERIC tool, six clusters of interventions were revealed: train and educate stakeholders, utilize financial strategies, adapt and tailor to context, engage consumers, use evaluative and iterative strategies and develop stakeholder interrelations. (4) Conclusions: The enablers and barriers identified are similar to those described in the literature. Given there is close agreement between the ERIC consensus framework recommendations and the evidence, this approach will likely assist in enhancing the implementation of Rauland's Concentric Care fall prevention platform and other similar workflow technologies that have the potential to disrupt team and organisational routines. The results of this study will provide a blueprint to enhance implementation that will be tested for effectiveness at a later stage.


Subject(s)
Accidental Falls , Hospitals , Humans , Qualitative Research , Focus Groups
2.
Muscles Ligaments Tendons J ; 7(1): 46-52, 2017.
Article in English | MEDLINE | ID: mdl-28717611

ABSTRACT

BACKGROUND: At present, it is unclear which is the best management for Achilles tendon rupture. PURPOSE: We assess the clinical, functional and imaging outcomes of active patients undergoing 3 different types of management for acute subcutaneous rupture of the Achilles tendon, including conservative cast immobilization, traditional open surgery and percutaneous repair. METHODS: 26 active patients were managed for a rupture of the Achilles Tendon from January 2007 to March 2008. Anthropometric measurements, Functional assessment, Isometric strength, Ultrasonographic assessment, Patient satisfaction, Working life, Physical activity, Functional score and Complications were recorded retrospectively. RESULTS: All 23 (21 men, 2 women) patients were reviewed at a minimum follow-up of 24 months (average 25.7, range 24 to 32 months, SD: 6.3) from the index injury. Thermann scores and patient satisfaction were significantly higher following surgery than conservative management with no significance between open and minimally invasive operated patients. Sensitive disturbances occur in up to 12% of open repairs and 1.8% of patients managed nonsurgically. CONCLUSIONS: Clinical and functional outcomes following surgical repair, percutaneous and open, of the Achilles tendon are significantly improved than following conservative management. LEVEL OF EVIDENCE: Level III.

3.
J Tissue Eng Regen Med ; 11(8): 2333-2348, 2017 08.
Article in English | MEDLINE | ID: mdl-27151571

ABSTRACT

Mesenchymal stem cells (MSCs) represent a valuable resource for regenerative medicine treatments for orthopaedic repair and beyond. Following developments in isolation, expansion and differentiation protocols, efforts to promote clinical translation of emerging cellular strategies now seek to improve cell delivery and targeting. This study shows efficient live MSC labelling using silica-coated magnetic particles (MPs), which enables 3D tracking and guidance of stem cells. A procedure developed for the efficient and unassisted particle uptake was shown to support MSC viability and integrity, while surface marker expression and MSC differentiation capability were also maintained. In vitro, MSCs showed a progressive decrease in labelling over increasing culture time, which appeared to be linked to the dilution effect of cell division, rather than to particle release, and did not lead to detectable secondary particle uptake. Labelled MSC populations demonstrated magnetic responsiveness in vitro through directed migration in culture and, when seeded onto a scaffold, supporting MP-based approaches to cell targeting. The potential of these silica-coated MPs for MRI cell tracking of MSC populations was validated in 2D and in a cartilage repair model following cell delivery. These results highlight silica-coated magnetic particles as a simple, safe and effective resource to enhance MSC targeting for therapeutic applications and improve patient outcomes. © 2016 The Authors Journal of Tissue Engineering and Regenerative Medicine Published by John Wiley & Sons Ltd.


Subject(s)
Cell Tracking/methods , Cell- and Tissue-Based Therapy , Coated Materials, Biocompatible , Magnetic Fields , Mesenchymal Stem Cells , Silicon Dioxide , Staining and Labeling/methods , Antigens, Differentiation/biosynthesis , Cell Differentiation/drug effects , Coated Materials, Biocompatible/chemistry , Coated Materials, Biocompatible/pharmacology , Gene Expression Regulation/drug effects , Humans , Mesenchymal Stem Cells/cytology , Mesenchymal Stem Cells/metabolism , Silicon Dioxide/chemistry , Silicon Dioxide/pharmacology
4.
Muscles Ligaments Tendons J ; 6(2): 216-223, 2016.
Article in English | MEDLINE | ID: mdl-27900295

ABSTRACT

BACKGROUND: Many strategies have been used to improve the visualisation of the ACL including sagittal, coronal oblique sequences, and 3D volume imaging. Nevertheless, the ACL may not always be visualised. METHODS: Two hundred and thirty-one consecutive patients (77 females; 154 males; average age 43.5, range 18 to 82 years; 205 with chronic, 20 acute, and 6 acute on chronic symptoms) underwent knee arthroscopy for mechanical symptoms within a week of MRI. After routine orthogonal sequences, if general MRI radiographers, with over four years experience, were not able to identify the presence of the ACL, then two 3D volume sequences and 2D limited sagittal oblique T1 sequences were performed. Patients requiring extra sequences, missed by the radiography technicians, were recalled. The MRI sequences were evaluated in a blinded fashion by three radiologists, and compared to the knee arthroscopy findings, with the normal ACL acting as internal controls. The radiography technicians performed additional ACL sequences in 63 patients (27%); of these, 10 patients had a partial and 12 patients had a complete ACL tear. Only 2 patients (0.6%) were recalled (one with a normal, and one with a full thickness ACL tear). RESULTS: The filmed ACL evaluation for complete tears and a normal ACL had a sensitivity of 100%, specificity of 97.1% and accuracy of 97.3%, slightly higher than evaluating on the monitor. Volume sequences had specificities and accuracies over 95%, with good intraobserver reliability (Kappa 0.859, 95% CI 0.705-1.0). Experienced radiographers identified most cases requiring supplementary MRI ACL sequences. An additional volume sequence was beneficial when filmed. Use of the monitor can offer some benefits. Limited oblique T1 sequence of the intercondylar notch was unreliable.

5.
Cureus ; 8(12): e938, 2016 Dec 23.
Article in English | MEDLINE | ID: mdl-28123919

ABSTRACT

The use of simulation in medical training is quickly becoming more common, with applications in emergency, surgical, and nursing education. Recently, registered nurses working in surgical inpatient units requested a mock code simulation to practice skills, improve knowledge, and build self-confidence in a safe and controlled environment. A simulation scenario using a high-fidelity mannequin was developed and will be discussed herein.

6.
J Sci Med Sport ; 19(5): 373-8, 2016 May.
Article in English | MEDLINE | ID: mdl-26095373

ABSTRACT

OBJECTIVES: To investigate the diagnostic performance of grey scale Ultrasound (US), power Doppler (PD) and US elastography for diagnosing painful patellar tendinopathy, and to establish their relationship with Victorian Institute of Sport Assessment-Patella (VISA-P) scores in a group of volleyball players with and without symptoms of patellar tendinopathy. DESIGN: Cross-sectional study. METHODS: Thirty-five volleyball players (70 patellar tendons) were recruited during a national university volleyball competition. Players were imaged with conventional US followed by elastography. The clinical findings of painful patellar tendons were used as the reference standard for diagnosing patellar tendinopathy. In addition, all participants completed the VISA-P questionnaires. RESULTS: Of the 70 patellar tendons, 40 (57.1%) were clinically painful. The diagnostic accuracy of grey scale US, PD and elastography were 60%, 50%, 62.9%, respectively, with sensitivity/specificity of 72.5%/43.3%, 12.5%/100%, and 70%/53.3%, respectively. Combined US elastography and grey scale imaging achieved 82.5% sensitivity, 33.3% specificity and 61.4% accuracy while routine combination technique of PD and grey scale imaging revealed 72.5% sensitivity, 43.3% specificity and 60.0% accuracy. Tendons in players categorized as soft on elastography had statistically significantly greater AP thickness (p<0.001) and lower VISA-P scores (p=0.004) than those categorized as hard. There was no significant association between grey scale US abnormalities (hypoechogenicities and/or fusiform swelling) and VISA-P scores (p=0.098). CONCLUSIONS: Soft tendon properties depicted by US elastography may be more related to patellar tendon symptoms compared to grey scale US abnormalities. The supplementation of US elastography to conventional US may enhance the sensitivity for diagnosing patellar tendinopathy in routine clinical practice.


Subject(s)
Elasticity Imaging Techniques , Patellar Ligament/diagnostic imaging , Tendinopathy/diagnostic imaging , Volleyball/physiology , Adolescent , Adult , Cohort Studies , Female , Humans , Male , Patellar Ligament/physiopathology , Tendinopathy/physiopathology , Young Adult
9.
Int Orthop ; 35(9): 1381-90, 2011 Sep.
Article in English | MEDLINE | ID: mdl-21584644

ABSTRACT

PURPOSE: The purpose of this study was to evaluate the relation between pelvic fracture patterns and the angiographic findings, and to assess the effectiveness of the embolisation. METHODS: This retrospective study, included patients with pelvic fractures and angiographic evaluation. Demographics, Injury Severity Score (ISS), associated injuries, embolisation time, blood units needed, method of treatment and complications were recorded and analysed. Fractures were classified according to the Burgess system. RESULTS: Between 1998 and 2008, 34 patients with pelvic fractures underwent angiographic investigation. Twenty six were males. The mean age was 41 years. Twenty-seven were motor vehicle accidents and seven were falls. There were 11 anterior posterior (APC) fractures, 12 lateral compression (LC), eight vertical shear (VS) patterns and three with combined mechanical injuries. The median ISS was 33.1 (range 5-66). From the 34 who underwent angiography, 29 had positive vascular extravasations. From them, 21 had embolisation alone, two had vascular repair and embolisation, five required vascular repair alone and one patient died while being prepared for embolisation. Five cases were re-embolised. The findings suggested that AP fractures have a higher tendency to bleeding compared with LC fractures. Both had a higher chance of blood loss compared to VS and complex fracture patterns. We reported 57 additional injuries and 65 fractures. The complications were: one non lethal pulmonary embolism, one renal failure, one liver failure, one systemic infection, two deep infections and two psychological disorientations. Seven patients died in hospital. CONCLUSION: Control of pelvic fracture bleeding is based on the multidisciplinary approach mainly related to hospital facilities and medical personnel's awareness. The morphology of the fracture did not have a predictive value of the vascular lesion and the respective bleeding.


Subject(s)
Angiography/methods , Embolization, Therapeutic/methods , Fractures, Bone/therapy , Pelvic Bones/injuries , Pelvis/blood supply , Accidents , Adolescent , Adult , Aged , Aged, 80 and over , Algorithms , Female , Fractures, Bone/pathology , Humans , Male , Middle Aged , Pelvic Bones/blood supply , Pelvic Bones/pathology , Radiography, Interventional , Retrospective Studies , Trauma Severity Indices , Young Adult
10.
J Appl Physiol (1985) ; 111(1): 68-74, 2011 Jul.
Article in English | MEDLINE | ID: mdl-21474701

ABSTRACT

The purpose of this study was to determine the effect of dynamometer and joint axis misalignment on measured isometric knee-extension moments using inverse dynamics based on the actual joint kinematic information derived from the real-time X-ray video and to compare the errors when the moments were calculated using measurements from external anatomical surface markers or obtained from the isokinetic dynamometer. Six healthy males participated in this study. They performed isometric contractions at 90° and 20° of knee flexion, gradually increasing to maximum effort. For the calculation of the actual knee-joint moment and the joint moment relative to the knee-joint center, determined using the external marker, two free body diagrams were used of the Cybex arm and the lower leg segment system. In the first free body diagram, the mean center of the circular profiles of the femoral epicondyles was used as the knee-joint center, whereas in the second diagram, the joint center was assumed to coincide with the external marker. Then, the calculated knee-joint moments were compared with those measured by the dynamometer. The results indicate that 1) the actual knee-joint moment was different from the dynamometer recorded moment (difference ranged between 1.9% and 4.3%) and the moment calculated using the skin marker (difference ranged between 2.5% and 3%), and 2) during isometric knee extension, the internal knee angle changed significantly from rest to the maximum contraction state by about 19°. Therefore, these differences cannot be neglected if the moment-knee-joint angle relationship or the muscle mechanical properties, such as length-tension relationship, need to be determined.


Subject(s)
Isometric Contraction , Knee Joint/physiology , Muscle Strength Dynamometer , Muscle, Skeletal/physiology , Adult , Analysis of Variance , Biomechanical Phenomena , Humans , Knee Joint/diagnostic imaging , Male , Models, Biological , Muscle Strength Dynamometer/standards , Muscle, Skeletal/diagnostic imaging , Predictive Value of Tests , Radiography , Range of Motion, Articular , Reproducibility of Results , Rotation , Tendons/physiology , Torque , Video Recording , Young Adult
11.
Spine J ; 11(12): 1157-63, 2011 Dec.
Article in English | MEDLINE | ID: mdl-22208859

ABSTRACT

BACKGROUND CONTEXT: Lumbar spondylolysis is a well-recognized condition occurring in adolescents because of repetitive overuse in sports. Multiple-level spondylolysis involving consecutive lower lumbar segments are rare. Several authors have reported failure of conservative treatment in the management of multiple-level pars fractures. STUDY DESIGN: A case report and review of previous literature is presented. OBJECTIVE: The objectives of this case report were to present a rare case of pars fracture involving nonconsecutive segments and discuss image findings and treatment. METHODS: The patent's history, clinical examination, computed tomography (CT), magnetic resonance imaging (MRI) findings, and treatment are reported. We also discuss the pathogenesis, various treatment options, and review the literature. RESULTS: We present the fourth case of bilateral pars fractures involving nonconsecutive lower lumbar spine segments of L3 and L5, in a 16-year-old young adolescent footballer who presented with 4-month history of constant low back pain. After 1 year of conservative management, the more acute fractures at L3 showed complete bony union, symptomatic pain relief, and return to full sporting activity. CONCLUSION: We report a rare case of bilateral pars fractures involving nonconsecutive segments. Multiplane reconstruction of CT images and MRI are very useful in planning treatment and follow-up. Conservative management may be used to treat multilevel nonconsecutive pars fractures.


Subject(s)
Lumbar Vertebrae/pathology , Spinal Fractures/pathology , Spondylolysis/pathology , Adolescent , Athletic Injuries/complications , Athletic Injuries/diagnosis , Athletic Injuries/therapy , Braces , Exercise Therapy , Fracture Healing , Humans , Low Back Pain/diagnosis , Low Back Pain/etiology , Low Back Pain/therapy , Magnetic Resonance Imaging , Male , Pain Management , Recovery of Function , Rest , Spina Bifida Occulta/complications , Spina Bifida Occulta/diagnosis , Spinal Fractures/complications , Spinal Fractures/therapy , Spondylolysis/etiology , Spondylolysis/therapy , Tomography, X-Ray Computed , Treatment Outcome
12.
Spine (Phila Pa 1976) ; 35(4): 430-3, 2010 Feb 15.
Article in English | MEDLINE | ID: mdl-20081559

ABSTRACT

STUDY DESIGN: Computer modeling using patient computed tomography (CT) exposure data. OBJECTIVE: To adequately consent patients, radiation dose needs to be converted into a relative risk of inducing a cancer. This article estimates different radiation doses and their relative risk of inducing a cancer from spine CT. SUMMARY OF BACKGROUND DATA: There has been a marked increase in imaging, particularly CT, and medical exposures make up the majority of background radiation. There is little in the literature about radiation does form spine radiograph and CT imaging. METHOD: Based on Monte Carlo simulations and the use of software designed for CT dosimetry, the anatomic region of the spine was mapped onto a mathematical phantom. The routine CT protocol was applied with corrections made to reflect the variation in radiation exposure along the length of the spine, resulting from automatic exposure control. The effective dose was calculated for each protocol and the relative risk of cancer induction calculated. RESULTS: Risk ratio for inducing a cancer when CT scanning the whole lumbar spine was about 1 in 3200, which was much less than the risk of CTing the whole dorsal spine (about 1 in 1800) due to the longer coverage required and the anatomic implications of scanning in the region of the cervical dorsal junction. Quantitative CT of the lumbar spine is a low dose technique with estimated effective dose about 0.1 mSv with an estimated cancer risk of 1 in 200,000 compared to a typical chest radiograph estimated effective dose of 0.02 mSv, which gives a relative risk of causing cancer of about 1 in 1,000,000. Undertaking evaluation of the dorsal and lumbar markedly reduces the amount of radiation and therefore reduces the risk, for instance the estimated effective dose of CT from L3 to L5 is about 3.5 mSv, with an estimated cancer risk of 1 in 5200. CONCLUSION: Precise CT technique of the spine, covering the smallest area necessary to answer the clinical question, has a dramatic effect on the estimated cancer risk for individual patient. Cancer risks are summative, so spine CT imaging needs to be considered in the light of the total radiation risk to the patient over their lifetime.


Subject(s)
Neoplasms, Radiation-Induced/etiology , Radiation Dosage , Spine/diagnostic imaging , Tomography, Spiral Computed/adverse effects , Cervical Vertebrae/diagnostic imaging , Computer Simulation , Dose-Response Relationship, Radiation , Humans , Lumbar Vertebrae/diagnostic imaging , Monte Carlo Method , Phantoms, Imaging , Radiography, Thoracic/adverse effects , Risk Assessment , Risk Factors , Tomography, Spiral Computed/instrumentation
14.
Clin Orthop Relat Res ; 468(4): 1025-32, 2010 Apr.
Article in English | MEDLINE | ID: mdl-19847582

ABSTRACT

UNLABELLED: Cobb described a method of reconstruction in Johnson and Strom Type II tibialis posterior dysfunction (TPD) using a split tibialis anterior musculotendinous graft. We assessed patient function and satisfaction after a modified Cobb reconstruction in a group of patients with a narrow spectrum of dysfunction, examined a modification of the Johnson and Strom classification to emphasize severity of deformity, and assessed the ability of the technique to prevent subsequent fixed deformity. We prospectively followed 32 patients managed by this technique and a translational os calcis osteotomy with early flexible deformity after failed conservative treatment. There were 28 women and four men with unilateral disease. The average followup was 5.1 years. Staging was confirmed clinically and with imaging. The modified surgery involved a bone tunnel in the navicular rather than the medial cuneiform with plaster for 8 weeks followed by orthotics and physiotherapy. All of the osteotomies healed and 29 of the 32 patients could perform a single heel rise test at 12 months. The mean postoperative American Orthopaedic Foot and Ankle Society hindfoot score was 89. One patient had a superficial wound infection and one a temporary dysesthesia of the medial plantar nerve; both resolved. The observations suggest the technique is a comparable method of treating early Johnson and Strom Type II TPD. LEVEL OF EVIDENCE: Level IV, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.


Subject(s)
Flatfoot/surgery , Foot Deformities, Acquired/surgery , Plastic Surgery Procedures/methods , Posterior Tibial Tendon Dysfunction/surgery , Tendon Transfer/methods , Tendons/surgery , Female , Flatfoot/physiopathology , Foot Deformities, Acquired/physiopathology , Humans , Male , Osteotomy/methods , Patient Satisfaction , Posterior Tibial Tendon Dysfunction/physiopathology , Recovery of Function , Retrospective Studies , Severity of Illness Index , Tendons/physiopathology , Treatment Outcome
15.
Skeletal Radiol ; 39(6): 509-21, 2010 Jun.
Article in English | MEDLINE | ID: mdl-19711073

ABSTRACT

AIM: To evaluate the imaging of the natural history of Achilles tendinopathy microvascularisation in comparison with symptoms, using a validated disease-specific questionnaire [the Victorian Institute of Sport Assessment-Achilles (VISA-A)]. METHOD: A longitudinal prospective pilot study of nine patients with post-contrast magnetic resonance imaging (MRI), time-intensity curve (TIC) enhancement, ultrasound (US) and power Doppler (PD) evaluation of tendinopathy of the mid-Achilles tendon undergoing conservative management (eccentric exercise) over 1 year. RESULTS: There were five men and four women [mean age 47 (range 30-62) years]. Six asymptomatic tendons with normal US and MRI appearance showed less enhancement than the tibial metaphysis did and showed a flat, constant, but very low rate of enhancement in the bone and Achilles tendon (9-73 arbitrary TIC units). These normal Achilles tendons on imaging showed a constant size throughout the year (mean 4.9 mm). At baseline the TIC enhancement in those with tendinopathy ranged from 90 arbitrary units to 509 arbitrary units. Over time, 11 abnormal Achilles tendons, whose symptoms settled, were associated with a reduction in MRI enhancement mirrored by a reduction in the number of vessels on power Doppler (8.0 to 2.7), with an improvement in morphology and a reduction in tendon size (mean 15-10.6 mm). One tendon did not change its abnormal imaging features, despite improving symptoms. Two patients developed contralateral symptoms and tendinopathy, and one had more abnormal vascularity on power Doppler and higher MRI TIC peaks in the asymptomatic side. CONCLUSIONS: In patient with conservatively managed tendinopathy of the mid-Achilles tendon over 1 year there was a reduction of MRI enhancement and number of vessels on power Doppler, followed by morphological improvements and a reduction in size. Vessels per se related to the abnormal morphology and size of the tendon rather than symptoms. Symptoms improve before the Achilles size reduces and the restoration of normal imaging over time.


Subject(s)
Achilles Tendon/blood supply , Magnetic Resonance Imaging/methods , Microvessels/diagnostic imaging , Microvessels/pathology , Tendinopathy/diagnosis , Tendinopathy/rehabilitation , Ultrasonography, Doppler/methods , Achilles Tendon/diagnostic imaging , Achilles Tendon/pathology , Adult , Female , Humans , Longitudinal Studies , Male , Middle Aged , Pilot Projects , Radiography , Reproducibility of Results , Sensitivity and Specificity , Surveys and Questionnaires , Treatment Outcome
16.
Int J Technol Assess Health Care ; 25(4): 577-83, 2009 Oct.
Article in English | MEDLINE | ID: mdl-19845989

ABSTRACT

OBJECTIVES: A randomized controlled trial (RCT) showed magnetic resonance imaging for patients waiting for knee arthroscopy did not reduce the number of arthroscopies. Our study aimed to identify decisions made by orthopedic surgeons about whether patients on a waiting list should proceed to arthroscopy, and to describe surgeons' decisions. METHODS: Five surgeons were asked to Think Aloud (TA) as they made their decisions for twelve patients from the original RCT. Audiotapes of the decision making were transcribed for analysis. RESULTS: For five patients, surgeons agreed about proceeding with arthroscopy, although reasoning differed. In no cases did surgeons agree about not proceeding to arthroscopy. Agreement was more likely in patients with clinically diagnosed meniscal abnormality, and less likely in patients with osteoarthritis. CONCLUSIONS: Surgeons' decisions were influenced by patient wishes. For some patients, the decision to proceed with arthroscopy was based solely on clinical diagnosis; MRI may not be advantageous in these instances. Surgeons disagreed more often than they agreed about the decision to proceed with arthroscopy, particularly when OA was diagnosed. This has implications for decision making in the current NHS patient choice environment. Patients may choose a treatment provider from a list of available providers at time of original clinical assessment and diagnosis. The treating surgeon does not necessarily re-examine the patient until the day of surgery. Given the variation between surgeons about the merits of proceeding with arthroscopy, surgeons may end up in the invidious position of providing surgery to patients whom they do not believe will benefit from arthroscopy.


Subject(s)
Arthroscopy/statistics & numerical data , Decision Making , Knee Joint/surgery , Adult , Aged , Disease Progression , Female , Humans , Magnetic Resonance Imaging , Male , Middle Aged , Osteoarthritis, Knee/surgery , Socioeconomic Factors
17.
Eur J Appl Physiol ; 105(5): 809-14, 2009 Mar.
Article in English | MEDLINE | ID: mdl-19125279

ABSTRACT

The purpose of this study was to estimate and compare the moment arm length of the patellar tendon (d) during passive knee extension using three different reference landmarks; instant centre of rotation (ICR), tibiofemoral contact point (TFCP) and geometrical centre of the posterior femoral condyles (GCFC). Measurements were taken on the right leg on seven healthy males during passive knee rotation performed by the motor of a Cybex Norm isokinetic dynamometer. Moment arms lengths were obtained by analysing lateral X-ray images recorded using a GE FlexiView 8800 C-arm videofluoroscopy system. The d-knee joint angle relations with respect to GCFC and ICR were similar, with decreasing values from full knee extension (~5.8 cm for d (GCFC) and ~5.9 cm for d (ICR)) to 90 degrees of knee flexion (~4.8 cm for both d (GCFC) and d (ICR)). However, the d (TFCP)-knee joint angle relation had an ascending-descending shape, with the highest d (TFCP) value (~5 cm) at 60 degrees of knee flexion. There was no significant difference between the GCFC and ICR methods at any knee joint angle. In contrast, there were significant differences (P < 0.01) between d (ICR) and d (TFCP) at 0 degrees , 15 degrees , 30 degrees and 45 degrees of knee flexion and between d (GCFC) and d (TFCP) at 0 degrees , 15 degrees and 30 degrees of knee flexion (P < 0.01). This study shows that when using different knee joint rotation centre definitions, there are significant differences in the estimates of the patellar tendon moment arm length, especially in more extended knee joint positions. These differences can have serious implications for joint modelling and loading applications.


Subject(s)
Patellar Ligament/physiology , Adult , Humans , Knee Joint/physiology , Male , Movement , Muscle Contraction/physiology
18.
Cochrane Database Syst Rev ; (4): CD001161, 2008 Oct 08.
Article in English | MEDLINE | ID: mdl-18843615

ABSTRACT

BACKGROUND: Fracture of the calcaneus (os calcis or heel bone) comprises one to two per cent of all fractures. OBJECTIVES: To identify and evaluate randomised trials of treatments for calcaneal fractures. SEARCH STRATEGY: MEDLINE, EMBASE, CINAHL, the Cochrane Controlled Trials Register, and the Cochrane Musculoskeletal Injuries Group Trials Register were searched. We checked reference lists of relevant articles and contacted trialists and experts in the field. Date of the most recent search: October 1998. SELECTION CRITERIA: Randomised and quasi-randomised trials comparing interventions for treating patients with calcaneal fractures. DATA COLLECTION AND ANALYSIS: Two reviewers independently assessed trial quality, using a 12 item scale, and extracted data. Wherever appropriate and possible, results were pooled. MAIN RESULTS: Of the six relevant randomised trials identified, four were included, one excluded and one is ongoing.All four included trials had methodological flaws.Three trials, involving 134 patients, compared open reduction and internal fixation with non-operative management of displaced intra-articular fractures. Pooled results showed no apparent difference in residual pain (24/40 versus 24/42; Peto odds ratio 0.90, 95% confidence interval 0.34 to 2.36), but a lower proportion of the operative group was unable to return to the same work (11/45 versus 23/45; Peto odds ratio 0.30, 95% confidence interval 0.13 to 0.71), and was unable to wear the same shoes as before (12/52 versus 24/54; Peto odds ratio 0.37, 95% confidence interval 0.17 to 0.84).One trial, involving 23 patients, evaluated impulse compression therapy. At one year there was a mean difference of 1.40 pain units on a visual analogue score (scale 0-10) (95% confidence interval 0.02 to 2.82) in favour of the treated group. The impulse compression group had greater subtalar movement (mean difference 14.0 degrees, 95% confidence interval 3.2 to 24.6) at three months. On average, patients in the impulse compression group returned to work three months earlier than those in the control group. AUTHORS' CONCLUSIONS: Randomised trials of management of calcaneal fractures are few, small and generally of poor quality.Even where there is some evidence of benefit of operative compared with non-operative treatment, it remains unclear whether the possible advantages of surgery are worth its risks. Given this it seems best to wait for the results of one large ongoing trial on open reduction and internal fixation against conservative treatment.One very small trial suggests that impulse compression therapy for intra-articular calcaneal fractures may be beneficial.More large-scale, high quality randomised controlled trials are needed to confirm these results, and to test other interventions in the treatment of calcaneal fractures.


Subject(s)
Calcaneus/injuries , Fractures, Bone/therapy , Humans
19.
Disabil Rehabil ; 30(20-22): 1651-65, 2008.
Article in English | MEDLINE | ID: mdl-18720126

ABSTRACT

BACKGROUND: We report a patient with ossification of the Achilles tendon, presenting plain radiographs, ultrasound, power doppler, computed tomography and magnetic resonance findings. The majority of the tendon was ossified, and there was adjacent soft tissue oedema. The appearance of peritendinous oedema associated with ossification has not, to our knowledge, been reported in the literature, and could account for hindfoot pain in cases of tendon ossification. METHOD: A review of 44 articles on aetiology, histology and imaging was performed. RESULTS: Trauma, either accidental or from surgery, rather than tendinopathy is the likely aetiological factor. CONCLUSION: The Achilles tendon usually responds to an insult with the development of mature bone, not dystrophic calcification, with no evidence of inflammatory or degenerative changes.


Subject(s)
Achilles Tendon/pathology , Ossification, Heterotopic/pathology , Diagnostic Imaging , Female , Humans , Middle Aged , Ossification, Heterotopic/etiology
20.
Am J Sports Med ; 36(11): 2210-5, 2008 Nov.
Article in English | MEDLINE | ID: mdl-18593843

ABSTRACT

BACKGROUND: Tendon Doppler flow may be associated with tendon pain in symptomatic patients, but the relationship between Doppler flow and pain among athletes who are still competing is unclear. HYPOTHESIS: Among active athletes, Doppler flow may partly reflect tendon adaptation to increased mechanical load and/or asymptomatic tendinopathy. STUDY DESIGN: Cross-sectional study; Level of evidence, 3. METHODS: The Achilles tendons of 61 badminton players (24 elite, 37 recreational) were examined with gray-scale and color Doppler ultrasound. Achilles tendon pain and activity level (badminton training, badminton playing, badminton years) were measured. RESULTS: Doppler flow was not associated with current Achilles tendon pain but was associated with an increased anteroposterior tendon diameter (an indicator of tendinopathy) (P = .02). Athletes who had been playing badminton for longer were more likely to have Doppler flow (P < .01), and there was a trend toward an association between a greater number of badminton playing hours per week and Doppler flow (P = .07). CONCLUSION: Achilles tendon Doppler flow appears to be a sign of asymptomatic tendinopathy rather than pain among active athletes. The association between weekly badminton hours and badminton years and Doppler flow suggests that Doppler flow may be a response to mechanical load in this cohort.


Subject(s)
Achilles Tendon/blood supply , Achilles Tendon/diagnostic imaging , Pain/physiopathology , Achilles Tendon/physiopathology , Biomechanical Phenomena , Cross-Sectional Studies , Female , Humans , Male , Racquet Sports , Ultrasonography, Doppler, Color
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