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https://www.readbyqxmd.com/read/29035841/verification-of-an-improved-hip-joint-center-prediction-method
#1
Emily J Miller, Kenton R Kaufman
In motion analysis, the hip joint center (HJC) is used to define the proximal location of the thigh segment and is also the point about which hip moments are calculated. The HJC cannot be palpated; its location must be calculated. Functional methods have been proposed but are difficult to perform by some clinical populations. Therefore, regression methods are utilized, but yield large errors in estimating the HJC location. These prediction methods typically utilize the anterior and posterior superior iliac spines, where excessive adipose tissue makes correctly locating difficult...
October 10, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29034801/gluteus-minimus-and-gluteus-medius-muscle-activity-during-common-rehabilitation-exercises-in-healthy-postmenopausal-women
#2
Charlotte Ganderton, Tania Pizzari, Jill Cook, Adam Semciw
Study Design Controlled laboratory study, cross-sectional. Background The gluteus medius (GMed) and minimus (GMin) provide dynamic stability of the hip joint and pelvis and are susceptible to atrophy and injury with menopause, ageing and disease. Numerous exercises have been reported in the literature to elicit high levels of GMed activity, however few have differentiated between the portions of the GMed, and none have examined GMin. Objectives To quantify and rank the level of muscle activity of the 2 segments of GMin (anterior and posterior fibers) and 3 segments of GMed (anterior, middle and posterior fibers) during 4 isometric and 3 dynamic exercises in a group of healthy, post-menopausal women...
October 15, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29034799/measurement-properties-of-a-test-battery-to-assess-postural-orientation-during-functional-tasks-in-patients-undergoing-acl-injury-rehabilitation
#3
Jenny Nae, Mark W Creaby, Gustav Nilsson, Kay M Crossley, Eva Ageberg
Study Design Cross-sectional study. Background Visual rating of postural orientation (PO) during functional tasks may be a valuable tool to track rehabilitation progress following anterior cruciate ligament (ACL) injury. A valid test battery assessing PO as a separate construct is lacking. Objectives To evaluate measurement properties of a test battery to assess PO in patients with ACL injury. Methods Content validity of functional tasks was assessed by expert focus group discussions. 51 patients (45% women) with ACL injury performed nine functional tasks of varying difficulty...
October 15, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29033574/surgical-site-infections-following-instrumented-stabilization-of-the-spine
#4
Ulrike Dapunt, Caroline Bürkle, Frank Günther, Wojciech Pepke, Stefan Hemmer, Michael Akbar
BACKGROUND: Implant-associated infections are still a feared complication in the field of orthopedics. Bacteria attach to the implant surface and form so-called biofilm colonies that are often difficult to diagnose and treat. Since the majority of studies focus on prosthetic joint infections (PJIs) of the hip and knee, current treatment options (eg, antibiotic prophylaxis) of implant-associated infections have mostly been adapted according to these results. OBJECTIVE: The aim of this study was to evaluate patients with surgical site infections following instrumented stabilization of the spine with regard to detected bacteria species and the course of the disease...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29033502/biomechanical-model-based-evaluation-of-total-hip-arthroplasty-therapy-outcome
#5
Jörg Eschweiler, Julia Hawlitzky, Valentin Quack, Markus Tingart, Björn Rath
OBJECTIVE: Total-hip-arthroplasties are performed to treat patients with osteoarthritis. Surgical planning is usually based on specific radiographs. These information could also be used as data for biomechanical modelling. METHODS: Models are rarely used during clinical practice. Our aim was to analyze model-based the pre- and postoperatively hip-biomechanic. Pre- and postoperative X-rays of 30 patients were examined by using 4 biomechanical-models. RESULTS: The received results showed variations e...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29033157/midterm-survivorship-after-revision-total-hip-arthroplasty-with-a-custom-triflange-acetabular-component
#6
Brian P Gladnick, Keith A Fehring, Susan M Odum, Michael J Christie, David K DeBoer, Thomas K Fehring
BACKGROUND: Custom triflange acetabular components are being increasingly used for the reconstruction of Paprosky type IIIB acetabular defects. However, midterm survivorship data are lacking. METHODS: We queried the prospective registries at 2 high-volume revision centers for patients who had undergone revision total hip arthroplasty using a custom triflange component between 2000 and 2011. We identified 73 patients with minimum 5-year follow-up. These patients' records were reviewed to determine incidence of revision or reoperation, clinical performance, and radiographic stability...
September 21, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29032422/the-deep-layer-of-the-tractus-iliotibialis-and-its-relevance-when-using-the-direct-anterior-approach-in-total-hip-arthroplasty-a-cadaver-study
#7
David Putzer, Matthias Haselbacher, Romed Hörmann, Günter Klima, Michael Nogler
INTRODUCTION: Surgical approaches through smaller incisions reveal less of the underlying anatomy, and therefore, detailed knowledge of the local anatomy and its variations is important in minimally invasive surgery. The aim of this study was to determine the location, extension, and histomorphology of the deep layer of the iliotibial band during minimally invasive hip surgery using the direct anterior approach (DAA). MATERIALS AND METHODS: The morphology of the iliotibial tract was determined in this cadaver study on 40 hips with reference to the anterior superior iliac spine and the tibia...
October 14, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29031136/increased-sensory-noise-and-not-muscle-weakness-explains-changes-in-non-stepping-postural-responses-following-stance-perturbations-in-healthy-elderly
#8
Maarten Afschrift, Friedl De Groote, Sabine Verschueren, Ilse Jonkers
The response to stance perturbations changes with age. The shift from an ankle to a hip strategy with increasing perturbation magnitude occurs at lower accelerations in older than in young adults. This strategy shift has been related to age-related changes in muscle and sensory function. However, the effect of isolated changes in muscle or sensory function on the responses following stance perturbations cannot be determined experimentally since changes in muscle and sensory function occur simultaneously. Therefore, we used predictive simulations to estimate the effect of isolated changes in (rates of change in) maximal joint torques, functional base of support, and sensory noise on the response to backward platform translations...
October 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29030592/rare-occurrence-of-inflammatory-bowel-disease-in-a-cohort-of-han-chinese-ankylosing-spondylitis-patients-a-single-institute-study
#9
Chrong-Reen Wang, Chia-Tse Weng, Chung-Ta Lee, Kuo-Yuan Huang, Sheng-Min Hsu, Ming-Fei Liu
Despite a high prevalence of ankylosing spondylitis (AS) in Han Chinese, the clinical experience remains very limited in the extra-articular presentation of inflammatory bowel disease (IBD). A monocentric retrospective study was performed for the AS-associated IBD manifestation. This study analyzed AS patients fulfilling the 1984 revised New York diagnostic criteria, excluding those who had the onset of IBD before or concurrently with the diagnosis of AS, for their demographic, clinical, laboratory, radiological, pathological and medication data, particularly in the usage of anti-TNF monoclonal antibody...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29029869/determination-of-the-hip-rotation-centre-from-landmarks-in-pelvic-radiograph
#10
Hasan Bombaci, Bestami Simsek, Mehmet Soyarslan, Mustafa Murat Yildirim
OBJECTIVE: The hip rotation centre (HRC) is an important reference point in cases of total hip arthroplasty (THA). The aim of this study is to investigate the reference points in the Turkish population that enable the identification of the HRC in standard pelvic radiographs. METHODS: The pelvic radiographs of 50 women and 50 men were examined. The mean age was 46.2 (range; 18-91). Patients with deformity of the hip joint and non-standard pelvic radiograph due to hip flexion contracture were excluded from the study...
October 10, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29029356/total-hip-arthroplasty-dislocation-after-cardioversion-a-case-report
#11
Ahmed Siddiqi, Carl T Talmo, James V Bono
New onset postoperative atrial fibrillation (AF) is the most common perioperative arrhythmia in the elderly. The incidence after total joint arthroplasty is much lower than other non-cardiac surgeries. Since postoperative atrial fibrillation can cause increased length of hospital stay, mortality, and healthcare costs, it is critical to focus on prevention and prompt management. New onset atrial fibrillation is treated with rhythm control for patients who demonstrate hemodynamic instability or refractory to rate control measures...
October 12, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29029354/cost-analysis-of-sending-routine-pathology-specimens-following-total-joint-arthroplasty-in-the-age-of-bundled-payments
#12
Hayden S Holbrook, Johannes F Plate, Maxwell K Langfitt, Jason E Lang, John S Shields
Bundled payment plans are being developed as a means to curb healthcare spending. Routine histology following total hip arthroplasties (THA) and total knee arthroplasties (TKA) is standard practice at many institutions. Recently, the value of this practice has been questioned as histologic diagnoses in THA and TKA rarely differ from the clinical diagnoses. The goal of this study is to identify discrepant and discordant diagnoses following THA and TKA at an academic medical center and to calculate the cost-saving potential in the setting of a bundled payment plan...
October 12, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/29027573/dose-reduction-for-fluoroscopically-guided-injections-phantom-simulation-and-patient-procedures
#13
C Y Chang, F J Simeone, M C DeLorenzo, W E Palmer, M A Bredella, A J Huang
OBJECTIVE: To demonstrate fluoroscopy dose reduction through both simulated injections on a phantom and patient injections. MATERIALS AND METHODS: Our study was IRB-approved and HIPAA-compliant. Simulation on a phantom was used to estimate effective dose, entrance dose, and organ doses for hip joint injections without and with dose minimization technique (DMT). Additionally, 1,094 joint, bursae, and tendon sheath injections performed by three operators in the same fluoroscopy suite were evaluated both before and after application of DMT...
October 13, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29027115/correlation-between-mri-and-hip-arthroscopy-in-children-with-legg-calve-perthes-disease
#14
V Tiwari, S Gamanagatti, R Mittal, H Nag, S A Khan
BACKGROUND: Most of the information available about Legg-Calve-Perthes disease (LCPD) at present is gained through imaging modalities including plain radiographs and magnetic resonance imaging (MRI). But the accuracy of MRI in this disease and its predictive value to reveal various intra-articular pathologies is not known. We correlated the findings of MRI with those seen on hip arthroscopy in children with active stage of LCPD. METHODS: We conducted a prospective observational study in which MRI findings were correlated with corresponding findings on hip arthroscopy in a cohort of 25 patients of active LCPD below 12 years of age...
October 12, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/29025776/unusual-case-of-prosthetic-joint-infection-caused-by-francisella-tularensis
#15
Harsh Rawal, Ami Patel, Michael Moran
Tularaemia is a zoonotic infection caused by Francisella tularensis.Ulceroglandular, glandular, oculoglandular, pharyngeal, typhoidal and pneumonic types are the different types of the disease. Infection of prosthetic joints occurs at an exceedingly uncommon rate. We report a case of prosthetic joint infection involving the hip with F. tularensis, which to the best of our knowledge after a thorough literature review is the second of its kind.
October 11, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29025397/a-qualitative-study-of-patient-education-needs-for-hip-and-knee-replacement
#16
Deborah Kennedy, Amy Wainwright, Lucy Pereira, Susan Robarts, Patricia Dickson, Jennifer Christian, Fiona Webster
BACKGROUND: Quality health information is key to patient engagement, self-management and an enhanced healthcare experience. There is strong evidence to support involving patients and their families in the development and evaluation of health-related educational material. These factors were the impetus for our high volume joint replacement centre to undertake a qualitative study to elicit patient experiences to inform the development of effective strategies and education along the care continuum for hip and knee replacement...
October 12, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29025187/ultrasound-of-the-hip-joint-soft-tissues-and-nerves
#17
Alberto Tagliafico, Bianca Bignotti, Federica Rossi, Luca Maria Sconfienza, Carmelo Messina, Carlo Martinoli
No abstract text is available yet for this article.
November 2017: Seminars in Musculoskeletal Radiology
https://www.readbyqxmd.com/read/29024605/hip-and-ankle-kinematics-in-noncontact-anterior-cruciate-ligament-injury-situations-video-analysis-using-model-based-image-matching
#18
Hideyuki Koga, Atsuo Nakamae, Yosuke Shima, Roald Bahr, Tron Krosshaug
BACKGROUND: Detailed kinematic descriptions of real anterior cruciate ligament (ACL) injury situations are limited to the knee only. PURPOSE: To describe hip and ankle kinematics as well as foot position relative to the center of mass (COM) in ACL injury situations through use of a model-based image-matching (MBIM) technique. The distance between the projection of the COM on the ground and the base of support (BOS) (COM_BOS) normalized to the femur length was also evaluated...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29024597/significant-chondrocyte-viability-is-present-in-acetabular-chondral-flaps-associated-with-femoroacetabular-impingement
#19
Vonda J Wright, Christopher Laurence McCrum, Hongshuai Li, Michael J Tranovich, Johnny Huard
BACKGROUND: Patients presenting with cam deformity of the femoral head and neck sustain repeated trauma to the articular cartilage of the superior acetabulum, with chondral delamination injuries found during hip arthroscopy. Two previous studies reveal conflicting chondrocyte viability data in these traumatic cartilage injuries. The full-thickness nature of flaps may suggest that chondrocytes residing in the cartilage flap matrix in the joint environment would remain viable despite shear trauma...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29021886/antibiotic-laden-arthroplasty-with-a-novel-design-of-cement-mould-and-metallic-endoskeleton-for-treatment-of-hip-infection-an-inexpensive-alternative-a-preliminary-report-of-two-cases
#20
Cch William, S Simmrat, A M Suhaeb
Infection of the hip after implant fixation is an uncommon yet devastating complication that results in poor long-term outcome. The gold standard treatment for chronic infection after hip arthroplasty is a two-stage protocol: eradication of infection, follow by re-implantation arthroplasty. The use of interim antibiotic-laden cement spacer has become a popular procedure to maintain hip joint function and provide antibiotic elution simultaneously before re-implantation. However, antibiotic cement spacer is mechanically weak and breaks if overloaded...
July 2017: Malaysian Orthopaedic Journal
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