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https://www.readbyqxmd.com/read/29788713/tribochemical-competition-within-a-mos2-ti-dry-lubricated-macroscale-contact-in-ultrahigh-vacuum-a-time-of-flight-secondary-ion-mass-spectrometry-investigation
#1
Guillaume Colas, Aurélien Saulot, David Philippon, Yves Berthier, Didier Leonard
Controlling and predicting the tribological behavior of dry lubricant is a necessity to ensure low friction, long life, and low particle generation. Understanding the tribochemistry of the materials as a function of the environment is of primary interest as synergistic effects exist between the mechanics, the physicochemistry, the thermodynamics within a contact. However, in most studies the role of the coating internal contaminants in the process is often discarded to the benefit of a more common approach in which the performances of the materials are compared as a function of different atmospheric pressure environments...
May 23, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29786150/stem-cells-blood-vessels-and-angiogenesis-as-major-determinants-for-musculoskeletal-tissue-repair
#2
Johnny Huard
This manuscript summarizes 20 years of research from my laboratories at the University of Pittsburgh and, more recently, at the University of Texas Health Science Center at Houston and the Steadman Philippon Research Institute in Vail, Colorado. The discovery of muscle-derived stem cells (MDSCs) did not arise from a deliberate search to find a novel population of muscle cells with high regenerative potential, but instead was conceived in response to setbacks encountered while working in muscle cell transplantation for Duchenne muscular dystrophy (DMD)...
May 22, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29771222/structure-of-health-care-dyad-leadership-an-organization-s-experience
#3
Anurag Saxena, Maura Davies, Don Philippon
Purpose This study aims to explore the structural aspects (roles, responsibilities and reporting) of dyad leadership in one health-care organization (HCO). Design/methodology/approach The perceptions of 32 leaders (17 physician leaders and 15 dyad co-leaders) in formal leadership positions (six first-level with formal authority limited to teams or divisions, 23 middle-level with wider departmental or program responsibility and three senior-level with institution-wide authority) were obtained through focus groups and surveys...
May 8, 2018: Leadership in Health Services
https://www.readbyqxmd.com/read/29768929/current-concepts-in-revision-hip-arthroscopy
#4
Renato Locks, Ioanna Bolia, Hajime Utsunomiya, Karen Briggs, Marc J Philippon
Hip arthroscopy is an evolving procedure and its indications have expanded. The number of patients undergoing this procedure has increased significantly as well as the number of surgeons being trained. This has resulted in a notable increase in post-operative complication rates creating the need to develop advanced hip arthroscopic techniques. Revision hip arthroscopy is often complex and many factors should be considered to achieve a satisfactory clinical outcome. Careful pre-operative planning and agreement of expectations between the physician and patient regarding the procedure are important...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29730219/prevalence-of-high-grade-cartilage-defects-in-patients-with-borderline-dysplasia-with-femoroacetabular-impingement-a-comparative-cohort-study
#5
Ioanna K Bolia, Karen K Briggs, Renato Locks, Jorge Chahla, Hajime Utsunomiya, Marc J Philippon
PURPOSE: To compare the prevalence, size, and location of Outerbridge grade III and IV cartilage defects on the femoral head and acetabulum between patients with borderline acetabular dysplasia and patients with non-borderline dysplasia who underwent hip arthroscopy for femoroacetabular impingement (FAI). METHODS: Patients aged 18 years or older who underwent primary hip arthroscopy for correction of FAI and labral repair from November 2005 to April 2016 were included...
May 2, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29710111/effect-of-systematic-physician-cross-checking-on-reducing-adverse-events-in-the-emergency-department-the-charmed-cluster-randomized-trial
#6
Yonathan Freund, Hélène Goulet, Judith Leblanc, Jérôme Bokobza, Patrick Ray, Maxime Maignan, Sabine Guinemer, Jennifer Truchot, Anne-Laure Féral-Pierssens, Youri Yordanov, Anne-Laure Philippon, Edwin Rouff, Ben Bloom, Marine Cachanado, Alexandra Rousseau, Tabassome Simon, Bruno Riou
Importance: Emergency departments (ED) are environments that are at high risk for medical errors. Previous studies suggested that the proportion of medical errors may decrease when more than 1 physician is involved. Objective: To reduce the proportion of medical errors by implementing systematic cross-checking between emergency physicians. Design, Setting, and Participants: This cluster randomized crossover trial includes a random sample of 14 adult patients (age ≥18 years) per day during two 10-day period in 6 EDs (n = 1680 patients) in France...
April 23, 2018: JAMA Internal Medicine
https://www.readbyqxmd.com/read/29702527/comparative-impacts-of-scala-vestibuli-versus-scala-tympani-cochlear-implantation-on-auditory-performances-and-programming-parameters-in-partially-ossified-cochleae
#7
Mathieu Trudel, Mathieu Côté, Daniel Philippon, David Simonyan, Noémie Villemure-Poliquin, Richard Bussières
OBJECTIVE: To compare scala vestibuli versus scala tympani cochlear implantation in terms of postoperative auditory performances and programming parameters in patients with severe scala tympani ossification. STUDY DESIGN: Retrospective case-control study. SETTING: Tertiary referral center. PATIENTS: One hundred three pediatric and adult patients who underwent cochlear implant surgery between 2000 and 2016. Three groups were formed: a scala vestibuli group, a scala tympani with ossification group, and a scala tympani without ossification group...
April 26, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29644385/postoperative-alpha-angle-not-associated-with-patient-centered-midterm-outcomes-following-hip-arthroscopy-for-fai
#8
Karen K Briggs, Eduardo Soares, Sanjeev Bhatia, Marc J Philippon
PURPOSE: The most commonly used parameter for defining cam-type femoroacetabular impingement(FAI) has been the alpha angle. The purpose of this study was to determine if patient-reported outcomes 5 years following hip arthroscopy for FAI were associated with postoperative alpha angle. We hypothesized that patient-reported outcomes would not be influenced by postoperative alpha angle in patients with FAI. METHODS: 230 patients had primary hip arthroscopy for FAI and chondrolabral dysfunction...
April 11, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29595538/labral-augmentation-with-native-tissue-preservation-with-a-7-5-year-follow-up-a-case-report
#9
Jonathan A Godin, Lorenzo Fagotti, Karen K Briggs, Marc J Philippon
CASE: Arthroscopic labral repair has resulted in excellent functional outcomes. However, extensive labral damage or diminutive size of the labrum may preclude a repair. In these cases, labral augmentation serves as an operative treatment option. We report the case of a labral augmentation with 7.5 years of follow-up, including intraoperative reexamination, which highlights the ability of an iliotibial band autograft to incorporate with the native labrum. CONCLUSION: When indicated in an appropriate patient, labral augmentation with an iliotibial band autograft is an established technique that can result in an excellent outcome...
January 2018: JBJS Case Connector
https://www.readbyqxmd.com/read/29577839/single-sided-deaf-tactical-unit-officer-treated-with-cochlear-implantation
#10
Jean-Michel Bourque, Nicolas Rouleau, Mathieu Côté, Daniel Philippon, Richard Bussières
OBJECTIVES: To demonstrate the efficacy of cochlear implantation for management of a severe single-sided deaf tactical unit officer. Showing that hearing improvement provided by cochlear implantation was sufficient for him to return to work as a police tactical officer. METHODS: Case report. RESULTS: A 43 years-old man working as a tactical unit officer suffered from a work-related severe single-sided hearing loss. He tried unsuccessfully many types of hearing aids including a contralateral routing of sound (CROS) system and a bone conduction hearing aid with a headband...
March 26, 2018: Cochlear Implants International
https://www.readbyqxmd.com/read/29533689/effects-of-arthroscopy-for-femoroacetabular-impingement-syndrome-on-quality-of-life-and-economic-outcomes
#11
Richard C Mather, Shane J Nho, Andrew Federer, Berna Demiralp, Jennifer Nguyen, Asha Saavoss, Michael J Salata, Marc J Philippon, Asheesh Bedi, Christopher M Larson, J W Thomas Byrd, Lane Koenig
BACKGROUND: The diagnosis and treatment of femoroacetabular impingement (FAI) have increased steadily within the past decade, and research indicates clinically significant improvements after treatment of FAI with hip arthroscopy. PURPOSE: This study examined the societal and economic impact of hip arthroscopy by high-volume surgeons for patients with FAI syndrome aged <50 years with noncontroversial diagnosis and indications for surgery. STUDY DESIGN: Economic and decision analysis; Level of evidence, 2...
April 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29530774/anomalous-left-coronary-artery-from-the-pulmonary-artery-masquerading-as-peripartum-cardiomyopathy
#12
Jonathan Frigault, Valérie Lafrenière-Bessi, Jean Perron, Élisabeth Bédard, François Philippon, Paul Poirier, Éric Larose, Frédéric Jacques
Diagnosed with peripartum cardiomyopathy 8 years earlier, a 45-year-old female suffered sudden cardiac death. Following resuscitation, the patient was diagnosed with an anomalous origin of the left coronary artery from the pulmonary artery and underwent a successful coronary repair. The management of a patient with clinical features of cardiomyopathy is reviewed. Anomalous left coronary artery originating from the pulmonary artery (ALCAPA) is a rare but potentially lethal congenital anomaly affecting 1 in 300,000 live births1 ...
March 9, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29456067/revision-hip-arthroscopy-after-labral-reconstruction-using-iliotibial-band-autograft-surgical-findings-and-comparison-of-outcomes-with-labral-reconstructions-not-requiring-revision
#13
Renato Locks, Ioanna K Bolia, Hajime Utsunomiya, Karen K Briggs, Marc J Philippon
PURPOSE: To determine the causes of revision hip arthroscopy in patients who underwent labral reconstruction and to compare outcomes of these patients with patients who did not require a revision following reconstruction. METHODS: Patients who underwent revision hip arthroscopy after previous labral reconstruction from 2006 to 2014 were included. Patients with less than 2-year follow-up, preoperative joint space of ≤2 mm, or who underwent other reconstructive procedures at the time of labral reconstruction were excluded...
April 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29440159/multicentre-study-on-capsular-closure-versus-non-capsular-closure-during-hip-arthroscopy-in-danish-patients-with-femoroacetabular-impingement-fai-protocol-for-a-randomised-controlled-trial
#14
Christian Dippmann, Otto Kraemer, Bent Lund, Michael Krogsgaard, Per Hölmich, Martin Lind, Karen Briggs, Marc Philippon, Bjarne Mygind-Klavsen
INTRODUCTION: Hip arthroscopy has become a standard procedure in the treatment of hip joint pain not related to osteoarthritis or dysplasia in the young and active patient. There has been increasing focus on the contribution of the hip capsule to function and on stability following hip arthroscopy. It has been suggested that capsular closure after hip arthroscopy may prevent microinstability and macroinstability of the hip joint and reduce revision rate. However, it remains unknown whether capsular closure should be performed as a standard procedure when performing hip arthroscopies, especially in patients without additional risk factors for instability such as hypermobility or dysplasia of the hip...
February 10, 2018: BMJ Open
https://www.readbyqxmd.com/read/29423254/outcomes-following-arthroscopic-hip-segmental-labral-reconstruction-using-autologous-capsule-tissue-or-indirect-head-of-the-rectus-tendon
#15
Renato Locks, Jorge Chahla, Ioanna K Bolia, Karen K Briggs, Marc J Philippon
The purpose of this study was to determine the outcomes following segmental labral reconstruction (labral defects measuring <1 cm) using a segment of capsular tissue or a segment of the indirect head of rectus femoris tendon. Eleven patients (five females and six males) underwent segmental labral reconstruction using a segment of capsule (eight patients) or indirect head of rectus tendon (three patients) by a single surgeon from March 2005 to October 2012. The average age of the patients was 35 years old (range, 20-51 years)...
January 2018: Journal of Hip Preservation Surgery
https://www.readbyqxmd.com/read/29413244/long-term-outcomes-in-patients-with-new-permanent-pacemaker-implantation-following-transcatheter-aortic-valve-replacement
#16
Chekrallah Chamandi, Marco Barbanti, Antonio Munoz-Garcia, Azeem Latib, Luis Nombela-Franco, Enrique Gutiérrez-Ibanez, Gabriela Veiga-Fernandez, Asim N Cheema, Ignacio Cruz-Gonzalez, Vicenç Serra, Corrado Tamburino, Antonio Mangieri, Antonio Colombo, Pilar Jiménez-Quevedo, Jaime Elizaga, Gerard Laughlin, Dae-Hyun Lee, Bruno Garcia Del Blanco, Tania Rodriguez-Gabella, Josep-Ramon Marsal, Mélanie Côté, François Philippon, Josep Rodés-Cabau
OBJECTIVES: This study sought to evaluate the long-term clinical impact of permanent pacemaker implantation (PPI) after transcatheter aortic valve replacement (TAVR). BACKGROUND: Conduction disturbances leading to PPI are common following TAVR. However, no data exist regarding the impact of PPI on long-term outcomes post-TAVR. METHODS: This was a multicenter study including a total of 1,629 patients without prior PPI undergoing TAVR (balloon- and self-expandable valves in 45% and 55% of patients, respectively)...
February 12, 2018: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29400091/fellowship-program-in-health-system-improvement-a-novel-approach-integrating-leadership-development-and-patient-centred-health-system-transformation
#17
Donald J Philippon, Stephanie Montesanti, Tania Stafinski
This article highlights a novel approach to professional development, integrating leadership, development and patient-centred health system transformation in the new Fellowship Program in Health System Improvement offered by the School of Public Health at the University of Alberta. Early assessment of the program is also provided.
March 2018: Healthcare Management Forum
https://www.readbyqxmd.com/read/29399469/comprehensive-clinical-evaluation-of-femoroacetabular-impingement-part-3-magnetic-resonance-imaging
#18
Andrew G Geeslin, Matthew G Geeslin, Jorge Chahla, Sandeep Mannava, Salvatore Frangiamore, Marc J Philippon
Radiologic imaging is an essential supplement to the physical examination in the evaluation of a patient with femoroacetabular impingement. Plain radiographs are the initial modality of choice for the evaluation of bony anatomy and pathology. Magnetic resonance imaging supplements the physical examination and standard radiographs by enabling qualitative and quantitative evaluation of both articular cartilage and soft tissues about the hip. Magnetic resonance imaging also provides improved 3-dimensional characterization of the bony anatomy owing to the multiplanar nature of this technique...
October 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29399468/comprehensive-clinical-evaluation-of-femoroacetabular-impingement-part-2-plain-radiography
#19
Sandeep Mannava, Andrew G Geeslin, Salvatore J Frangiamore, Mark E Cinque, Matthew G Geeslin, Jorge Chahla, Marc J Philippon
The use of hip arthroscopy to treat various forms of hip pathology continues to grow. As part of a standard evaluation for eligibility for hip arthroscopy, we routinely obtain standard radiographs to assess the hip joint. These include orthogonal projections of the acetabulum and proximal femur, which can be obtained with a standing false profile, supine anteroposterior pelvis, and a lateral view of the proximal femur (either Dunn 45° or 90°, frog-leg lateral, or cross-table lateral). A comprehensive analysis of the radiographs is of utmost importance in order to indicate a patient for hip arthroscopy, for preoperative planning, and to determine prognosis...
October 2017: Arthroscopy Techniques
https://www.readbyqxmd.com/read/29399467/comprehensive-clinical-evaluation-of-femoroacetabular-impingement-part-1-physical-examination
#20
Salvatore Frangiamore, Sandeep Mannava, Andrew G Geeslin, Jorge Chahla, Mark E Cinque, Marc J Philippon
A thorough evaluation of the hip must include a comprehensive medical and surgical history focused on the hip joint, surrounding soft tissues, and the associated structures of the spine, pelvis, and lower extremities. These details can guide the physical examination and provide insight into the cause of the patient's chief complaints. A proper examination includes physical examination while the patient is in the upright, supine, prone, and lateral position, as well as an evaluation of gait. Guided by a thorough history, the physical examination enables the surgeon to distinguish between intra-articular and extra-articular contributors to hip pain, selection of appropriate imaging modalities, and ultimately supports medical decision making...
October 2017: Arthroscopy Techniques
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