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Rotator cuff volumes

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https://www.readbyqxmd.com/read/27900336/optimal-lateral-row-anchor-positioning-in-posterior-superior-transosseous-equivalent-rotator-cuff-repair-a-micro-computed-tomography-study
#1
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
#2
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
#3
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
#4
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
#5
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...
August 12, 2016: 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
#6
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...
August 11, 2016: 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
#7
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...
August 10, 2016: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/27469476/-surgical-treatment-of-posterosuperior-impingement-psi
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
https://www.readbyqxmd.com/read/26509152/comparison-of-pressure-changes-by-head-and-neck-position-between-high-volume-low-pressure-and-taper-shaped-cuffs-a-randomized-controlled-trial
#15
RANDOMIZED CONTROLLED TRIAL
Nobuyasu Komasawa, Ryosuke Mihara, Kentaro Imagawa, Kazuo Hattori, Toshiaki Minami
The present study compared changes in cuff pressure by head and neck position between high-volume low-pressure (HVLP) and taper-shaped (taper) cuffs in a prospective randomized clinical trial. Methods. Forty patients were intubated using tracheal tubes with either HVLP (n = 20; HVLP group) or taper-shaped (n = 20; Taper group) cuffs. Initial cuff pressure was adjusted to 15, 20, or 25 cmH2O in the neutral position. Cuff pressure was evaluated after changing the head and neck positions to flexion, extension, and rotation...
2015: BioMed Research International
https://www.readbyqxmd.com/read/26361437/reverse-shoulder-arthroplasty-in-the-united-states-a-comparison-of-national-volume-patient-demographics-complications-and-surgical-indications
#16
MULTICENTER STUDY
Robert W Westermann, Andrew J Pugely, Christopher T Martin, Yubo Gao, Brian R Wolf, Carolyn M Hettrich
BACKGROUND: Shoulder arthroplasty is increasing in the United States. Reverse shoulder arthroplasty (RSA) has emerged as an alternative treatment for end-stage glenohumeral pathology. Until recently, administrative coding practices have not differentiated RSA from traditional total shoulder arthroplasty (TSA), and thus national procedural volume has been unknown. The purpose of this study was to define the utilization, patient characteristics, indications and complications for RSA, and contrast these to TSA and hemiarthroplasty (HA)...
2015: Iowa Orthopaedic Journal
https://www.readbyqxmd.com/read/26315347/clinical-application-of-radial-magnetic-resonance-imaging-for-evaluation-of-rotator-cuff-tear
#17
H Honda, T Morihara, Y Arai, M Horii, H Ito, R Furukawa, Y Kida, T Sukenari, K Ikoma, R Oda, Y Yamada, H Fujiwara, T Kubo
BACKGROUND: Magnetic resonance imaging is useful for evaluating the rotator cuff, but some tendinous insertions cannot be assessed using oblique sagittal, oblique coronal, and axial magnetic resonance (MR) images because of the presence of the partial volume effect. HYPOTHESIS: The purpose of this study was to determine whether radial-slice MR images could reveal normal rotator cuff insertions and rotator cuff tears more clearly than conventional MR images. PATIENTS AND METHODS: The study included 18 subjects with normal rotator cuffs and 30 with rotator cuff tears...
October 2015: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/26304962/anabolic-steroids-reduce-muscle-degeneration-associated-with-rotator-cuff-tendon-release-in-sheep
#18
Christian Gerber, Dominik C Meyer, Martin Flück, Mario C Benn, Brigitte von Rechenberg, Karl Wieser
BACKGROUND: Chronic rotator cuff tendon tearing is associated with irreversible atrophy, fatty infiltration, and interstitial fibrosis of the corresponding muscle. HYPOTHESES: Anabolic steroids can prevent musculotendinous degeneration during retraction and/or can reverse these changes after operative repair of the retracted musculotendinous unit in sheep. STUDY DESIGN: Controlled laboratory study. METHODS: The infraspinatus tendon was released in 18 alpine sheep...
October 2015: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/26242410/the-usefulness-of-the-three-dimensional-enhanced-t1-high-resolution-isotropic-volume-excitation-mr-in-the-evaluation-of-shoulder-pathology-comparison-with-two-dimensional-enhanced-t1-fat-saturation-mr
#19
COMPARATIVE STUDY
Hee J Park, So Y Lee, Myung H Rho, Heon J Kwon, Mi S Kim, Eun C Chung
OBJECTIVE: To evaluate the diagnostic accuracy of three-dimensional (3D) enhanced T1 high-resolution isotropic volume excitation (eTHRIVE) shoulder MR for variable shoulder pathology such as rotator cuff tear, labral injury and synovial pathology in comparison with two-dimensional enhanced fast spin echo T1 fat saturation (2D T1 FS) sequences MR. METHODS: This retrospective study included 86 patients who underwent MRI of the shoulder using eTHRIVE technique. Two radiologists evaluated anatomic identification of the supraspinatus, glenoid labrum and acromioclavicular joint (AC joint) on routine MRI sequences (2D T1 FS) and compared them with the reformatted eTHRIVE images...
October 2015: British Journal of Radiology
https://www.readbyqxmd.com/read/26216105/detrimental-effect-of-repeated-and-single-subacromial-corticosteroid-injections-on-the-intact-and-injured-rotator-cuff-a-biomechanical-and-imaging-study-in-rats
#20
Eran Maman, Chaim Yehuda, Tamir Pritsch, Guy Morag, Tamar Brosh, Zachary Sharfman, Oleg Dolkart
BACKGROUND: The effect of corticosteroids on tendons is poorly understood, and current data are insufficient and conflicting. PURPOSE: To evaluate the effects of corticosteroid injections on intact and injured rotator cuffs (RCs) through biomechanical and radiographic analyses in a rat model. STUDY DESIGN: Controlled laboratory study. METHODS: A total of 70 rats were assigned to 7 groups. Uninjured rats (no tear) received either a single saline injection, a single methylprednisolone acetate (MTA) injection, or triple MTA injections...
January 2016: American Journal of Sports Medicine
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