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Rotator cuff volumes

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https://www.readbyqxmd.com/read/28187903/the-influence-of-trocar-fenestration-and-volume-on-connective-tissue-progenitor-cells-stem-cells-in-arthroscopic-bone-marrow-aspiration-from-the-proximal-humerus
#1
Andreas Voss, Mary Beth McCarthy, Hardeep Singh, Knut Beitzel, Jessica DiVenere, Mark P Cote, Alexander R Hoberman, Michael Nowak, Andreas B Imhoff, Augustus D Mazzocca
PURPOSE: To evaluate the number of connective tissue progenitor cells (CTPs) and nucleated cells obtained during bone marrow aspiration (BMA) from the proximal humerus using either a fenestrated or a nonfenestrated trocar and determine differences in varying amounts of aspiration volume. The first hypothesis was that the number of CTPs extracted with the fenestrated trocar would be greater due to its potential to extract more cells through its fenestrations. The second hypothesis was that using consecutive aspirations with either trocar would provide a consistent number of CTPs and nucleated cells throughout the aspiration with no significant decrease of cells at the end...
February 7, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28109672/optimizing-follow-up-after-anatomic-total-shoulder-arthroplasty
#2
Bradley Schoch, Jean David Werthel, Cathy D Schleck, William S Harmsen, John Sperling, Joaquín Sánchez-Sotelo, Robert H Cofield
BACKGROUND: With increases in both total shoulder arthroplasty (TSA) volumes and patient life expectancies, the number of patients requiring follow-up after shoulder arthroplasty continues to grow exponentially. The purpose of this study is to establish a data-based follow-up schedule minimizing unnecessary patient and health care system costs without sacrificing patient care. METHODS: Between January 1975 and January 2013, 2786 consecutive anatomic TSAs were performed at our institution...
January 19, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28071815/effect-of-glenohumeral-elevation-on-subacromial-supraspinatus-compression-risk-during-simulated-reaching
#3
Rebekah L Lawrence, Dustin M Schlangen, Katelyn A Schneider, Jonathan Schoenecker, Andrea L Senger, William C Starr, Justin L Staker, Jutta M Ellermann, Jonathan P Braman, Paula M Ludewig
Mechanical subacromial rotator cuff compression is one theoretical mechanism in the pathogenesis of rotator cuff disease. However, the relationship between shoulder kinematics and mechanical subacromial rotator cuff compression across the range of humeral elevation motion is not well understood. The purpose of this study was to investigate the effect of humeral elevation on subacromial compression risk of the supraspinatus during a simulated functional reaching task. Three-dimensional anatomical models were reconstructed from shoulder magnetic resonance images acquired from 20 subjects (10 asymptomatic, 10 symptomatic)...
January 10, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28025374/effect-of-local-anesthetic-concentration-0-2-vs-0-1-ropivacaine-on-pulmonary-function-and-analgesia-after-ultrasound-guided-interscalene-brachial-plexus-block-a-randomized-controlled-study
#4
Andrew K Wong, Lauren Georgiades Keeney, Liting Chen, Rebekah Williams, Jiabin Liu, Nabil M Elkassabany
OBJECTIVE: This study aims to assess diaphragmatic excursion and measure pulmonary functions as measures of the degree to which the phrenic nerve is blocked after ISB with two different concentrations of ropivacaine: 0.2% and 0.1%. DESIGN: Randomized, double-blinded study. SETTING AND PATIENTS: Ambulatory surgical facility. SUBJECTS: Fifty patients undergoing shoulder arthroscopy for rotator cuff repair. METHODS: Patients were randomized to receive ultrasound-guided ISB with 20 mL of either 0...
December 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/27992683/yearly-trends-in-elective-shoulder-arthroplasty-2005-through-2013
#5
Mark T Dillon, Priscilla H Chan, Maria C S Inacio, Anshuman Singh, Edward H Yian, Ronald A Navarro
OBJECTIVE: The purposes of this study were to evaluate the (1) change in incidence rate of shoulder arthroplasty, the (2) utilization of shoulder arthroplasty for specific indications, and the (3) surgeon volume trends associated with these procedures between 2005 and 2013. METHODS: A population based cohort study was conducted using the over 7 million members of an integrated healthcare system in California. Shoulder arthroplasty cases performed between 2005 and 2013 were identified using a Shoulder Arthroplasty Registry...
December 19, 2016: Arthritis Care & Research
https://www.readbyqxmd.com/read/27933383/the-burden-of-rotator-cuff-surgery-in-italy-a-nationwide-registry-study
#6
Umile Giuseppe Longo, Giuseppe Salvatore, Giacomo Rizzello, Alessandra Berton, Mauro Ciuffreda, Vincenzo Candela, Vincenzo Denaro
PURPOSE: This study aimed to estimate the yearly number of RC surgeries in Italy, a country with universal access to healthcare for its population, from 2001 to 2014, based on official information source as hospitalization records. A secondary aim was to explore geographical variation in equity in access to RC surgery between three macroregions of Italy (North, Center and South). A tertiary aim was to perform statistical projections of the number of RC procedure volumes and rates on the basis of data from 2001 to 2014...
February 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/27900336/optimal-lateral-row-anchor-positioning-in-posterior-superior-transosseous-equivalent-rotator-cuff-repair-a-micro-computed-tomography-study
#7
Matthias A Zumstein, Sumit Raniga, Agatha Labrinidis, Kevin Eng, Gregory I Bain, Beat K Moor
BACKGROUND: The optimal placement of suture anchors in transosseous-equivalent (TOE) double-row rotator cuff repair remains controversial. PURPOSE: A 3-dimensional (3D) high-resolution micro-computed tomography (micro-CT) histomorphometric analysis of cadaveric proximal humeral greater tuberosities (GTs) was performed to guide optimal positioning of lateral row anchors in posterior-superior (infraspinatus and supraspinatus) TOE rotator cuff repair. STUDY DESIGN: Descriptive laboratory study...
November 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27709061/arthroscopic-panorama-view-of-the-subacromial-space-via-deltoid-fascia-release
#8
Matthew Yalizis, Kevin Kruse, Arnaud Godenèche
Proper visualization is of paramount importance during arthroscopic rotator cuff repair. We propose a technique that significantly improves the visualization of the rotator cuff when viewing from the anterolateral or lateral portals. This "panorama" view is obtained by a release of the deep layer of the deltoid fascia, which in turn increases the space between the humerus and the deltoid muscle. This release increases the volume of the subdeltoid bursa, secondarily increasing the field of view of the subacromial space with the camera viewing from the anterolateral or lateral portals...
August 2016: Arthroscopy Techniques
https://www.readbyqxmd.com/read/27660799/comparisons-of-patient-demographics-in-prospective-sports-shoulder-and-national-database-initiatives
#9
Bryan M Saltzman, Gregory L Cvetanovich, Daniel D Bohl, Brian J Cole, Bernard R Bach, Anthony A Romeo
BACKGROUND: There has been increased emphasis in orthopaedics on high-quality prospective research to provide evidence-based treatment guidelines, particularly in sports medicine/shoulder surgery. The external validity of these studies has not been established, and the generalizability of the results to clinical practice in the United States is unknown. HYPOTHESIS: Comparison of patient demographics in major prospective studies of arthroscopic sports and shoulder surgeries to patients undergoing the same procedures in the National Surgical Quality Improvement Program (NSQIP) database will show substantial differences to question the generalizability and external validity of those studies...
September 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27620544/physician-training-ultrasound-and-accuracy-of-diagnosis-in-rotator-cuff-tears
#10
Michael Day, M Phil, Richard A McCormack, Samir Nayyar, Laith Jazrawi
INTRODUCTION: Ultrasonography offers a fast and inexpensive method to evaluate the rotator cuff in the office setting. However, the accuracy of ultrasound is highly user dependent. The purpose of this study is to investigate the learning curve of an orthopaedic surgeon in using ultrasound to diagnose rotator cuff tears. METHODS: A sports medicine fellowship trained orthopaedic surgeon was taught how to perform and interpret an ultrasound examination of the shoulder by a musculoskeletal radiologist...
September 2016: Bulletin of the Hospital for Joint Diseases
https://www.readbyqxmd.com/read/27528541/high-altitude-is-an-independent-risk-factor-for-venous-thromboembolism-following-arthroscopic-rotator-cuff-repair-a-matched-case-control-study-in-medicare-patients
#11
Jourdan M Cancienne, M Tyrrell Burrus, David R Diduch, Brian C Werner
BACKGROUND: Although the risk of venous thromboembolism (VTE) following elective shoulder arthroscopy is low, the large volume of procedures performed each year yields a significant annual burden of patients with thromboembolic complications. The purpose of this study was to evaluate the association of high procedural altitude with the incidence of postoperative VTE following arthroscopic rotator cuff repair. METHODS: A Medicare database was queried for all patients undergoing arthroscopic rotator cuff repair from 2005 to 2012...
January 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27523963/genomic-and-lipidomic-actions-of-nandrolone-on-detached-rotator-cuff-muscle-in-sheep
#12
Martin Flück, Severin Ruoss, Christoph B Möhl, Paola Valdivieso, Mario C Benn, Brigitte von Rechenberg, Endre Laczko, Junmin Hu, Karl Wieser, Dominik C Meyer, Christian Gerber
Reversal of fatty infiltration of pennate rotator cuff muscle after tendon release is hitherto impossible. The administration of nandrolone starting at the time of tendon release prevents the increase in fat content, but does not revert established fatty infiltration. We hypothesised that tendon release and myotendinous retraction cause alterations in lipid related gene expression leading to fatty muscle infiltration, which can be suppressed by nandrolone through its genomic actions if applied immediately after tendon release...
January 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27522337/effects-of-glenoid-inclination-and-acromion-index-on-humeral-head-translation-and-glenoid-articular-cartilage-strain
#13
Christoph Engelhardt, Alain Farron, Fabio Becce, Nicolas Place, Dominique P Pioletti, Alexandre Terrier
BACKGROUND: Previous clinical studies have reported associations between glenoid inclination (GI), the acromion index (AI), and the critical shoulder angle (CSA) on the one hand and the occurrence of glenohumeral osteoarthritis and supraspinatus tendon tears on the other hand. The objective of this work was to analyze the correlations and relative importance of these different anatomic parameters. METHODS: Using a musculoskeletal shoulder model developed from magnetic resonance imaging scans of 1 healthy volunteer, we varied independently GI from 0° to 15° and AI from 0...
January 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27469476/-surgical-treatment-of-posterosuperior-impingement-psi
#14
M Beirer, G H Sandmann, A B Imhoff, S Buchmann
OBJECTIVE: To restore the physiologic anterior and posterior capsular volume to achieve an anatomic central contact point of the glenohumeral articulation and treatment of concomitant glenohumeral injuries due to posterosuperior impingement (PSI). INDICATIONS: Plateauing of clinical improvement despite adequate nonsurgical treatment (for at least 6-12 months). CONTRAINDICATIONS: General contraindications for elective arthroscopic surgery...
December 2016: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/27348693/no-difference-in-long-term-development-of-rotator-cuff-rupture-and-muscle-volumes-in-impingement-patients-with-or-without-decompression
#15
RANDOMIZED CONTROLLED TRIAL
Saara Ketola, Janne Lehtinen, Petra Elo, Seppo Kortelainen, Heini Huhtala, Ilkka Arnala
Background and purpose - Arthroscopic acromioplasty is still commonly used in the treatment of shoulder impingement syndrome, even though its benefits are questioned; randomized controlled studies have not shown any benefits when compared to non-operative treatment. In this randomized study, we investigated whether operative treatment protects from later rotator cuff rupture and whether it has any effect on the development of rotator cuff muscle volume. Patients and methods - 140 stage-II impingement patients were randomized to a structured exercise group (n = 70) or to an operative group (n = 70)...
August 2016: Acta Orthopaedica
https://www.readbyqxmd.com/read/27312431/an-age-and-gender-related-three-dimensional-analysis-of-rotator-cuff-transverse-force-couple-volume-ratio-in-304-shoulders
#16
Abraham Guadalupe Espinosa-Uribe, Adrian Antonio Negreros-Osuna, Jorge Gutierréz-de la O, Félix Vílchez-Cavazos, Ricardo Pinales-Razo, Alejandro Quiroga-Garza, Guillermo Elizondo-Riojas, Rodrigo Enrique Elizondo-Omaña, Santos Guzmán-López
PURPOSE: The rotator cuff transverse force couple (RCTFC) is fundamental in the shoulder biomechanics, as the balance of its muscle components (the subscapularis relative to the infraspinatus and teres minor) provides stability to the joint. The chronic progression of rotator cuff tears usually present alterations in muscle volume, along with atrophy and compensatory hypertrophy, which can be determined using imaging techniques. The aim of this study was to quantify RCTFC muscle volume in a large sample taking into account the age and gender of the participants involved...
June 16, 2016: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/27252441/glenoid-dysplasia-pathophysiology-diagnosis-and-management
#17
REVIEW
Josef K Eichinger, Joseph W Galvin, Jason A Grassbaugh, Stephen A Parada, Xinning Li
➤Subtle forms of glenoid dysplasia may be more common than previously thought and likely predispose some patients to symptomatic posterior shoulder instability. Severe glenoid dysplasia is a rare condition with characteristic radiographic findings involving the posteroinferior aspect of the glenoid that often remains asymptomatic.➤Instability symptoms related to glenoid dysplasia may develop over time with increased activities or trauma. Physical therapy focusing on rotator cuff strengthening and proprioceptive control should be the initial management...
June 1, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27076229/effect-of-local-anesthetic-concentration-0-2-vs-0-1-ropivacaine-on-pulmonary-function-and-analgesia-after-ultrasound-guided-interscalene-brachial-plexus-block-a-randomized-controlled-study
#18
Andrew K Wong, Lauren Georgiades Keeney, Liting Chen, Rebekah Williams, Jiabin Liu, Nabil M Elkassabany
OBJECTIVE: This study aims to assess diaphragmatic excursion and measure pulmonary functions as measures of the degree to which the phrenic nerve is blocked after ISB with two different concentrations of ropivacaine: 0.2% and 0.1%. DESIGN: Randomized, double-blinded study. SETTING AND PATIENTS: Ambulatory surgical facility. SUBJECTS: Fifty patients undergoing shoulder arthroscopy for rotator cuff repair. METHODS: Patients were randomized to receive ultrasound-guided ISB with 20 mL of either 0...
April 13, 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/26865396/reversibility-of-supraspinatus-muscle-atrophy-in-tendon-bone-healing-after-arthroscopic-rotator-cuff-repair
#19
Yong Bok Park, Ho Young Ryu, Jin Ho Hong, Young Hoo Ko, Jae Chul Yoo
BACKGROUND: To date, there are few reports of the definite reversibility of rotator cuff muscle atrophy after repair. PURPOSE: To evaluate the reversibility of rotator cuff muscle atrophy after successful arthroscopic repair. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: Included in this study were 47 patients (mean age, 61.2 ± 7.3 years; range, 49-73 years) who underwent arthroscopic rotator cuff repair as well as magnetic resonance imaging (MRI) preoperatively and at 6-month and last follow-up...
April 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/26665030/quantifying-the-economic-impact-of-provider-volume-through-adverse-events-the-case-of-sports-medicine
#20
Daniel J Scott, Seth Sherman, Aman Dhawan, Brian J Cole, Bernard R Bach, Richard C Mather
BACKGROUND: Procedures performed by surgeons with higher provider volumes offer advantages both to the individual patient and the health system, with studies documenting fewer adverse events, shorter surgical times, and decreased reoperation rates. With workforce requirements for surgeons growing, it is increasingly necessary to establish the most efficient structure of this workforce. HYPOTHESIS: Substantial economic savings are realized when procedures are performed by high-volume providers as compared with low-volume providers in the areas of readmission, prolonged admission, and subsequent surgery...
March 2015: Orthopaedic Journal of Sports Medicine
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