Despite advances in arthroscopic repair of rotator cuff tears, recurrent tears after large and massive remain a significant clinical problem. The primary objective this study was to define the timing structural failure surgically repaired by serial imaging with ultrasound. secondary investigate association between outcome repair.Recurrent tear is more likely occur late (>3 months) postoperative period will be associated inferior scores.Cohort study; Level evidence, 3.Twenty-two consecutive...

Anatomic factors, such as a hooked acromion, have been associated with rotator cuff disorders. Orientation of the glenoid relative to scapula has implicated in shoulder instability, but it not linked The purpose current study was test hypothesis that superior inclination is full-thickness tears. Glenoid angles were measured from 16 radiographs convenience sample eight cadavers which one had an intact and other tear. for shoulders tears compared contralateral normal using nonparametric...

A 3-dimensional static biomechanical model of the glenohumeral joint was used to investigate rotator cuff muscle forces during maximal isometric exertions (abduction, adduction, internal rotation, and external rotation) arm elevation. Muscle moment arms cross sectional areas were determined from studies cadaveric specimens, strength data collected using a Cybex II dynamometer. Predicted posterior deltoid very low abduction in scapular plane. The predicted highest rotation (subscapularis)...

Occupational shoulder musculoskeletal injuries and disorders are common. Generally available work analysis tools do not offer insight into specific muscle load magnitudes that may indicate increased risk, nor they address many concerns germane to job analysis. To these issues, a biomechanical model of the was developed include several critical components: systematic inclusion kinematic kinetic effects, population scalability, geometric realism, an empirical glenohumeral constraint,...

<h3>Introduction</h3> Present clinical criteria for detecting alterations in blood volume postoperative patients are inadequate. Laboratory studies to support suspected findings also leave much be desired. Blood using radioactive substances and dilution techniques approximate most accurately the existing state at a particular unit of time but they do not determine rate replacement, withdrawal, or effectiveness such therapy except as judged by repeat reevaluation interpretation signs. It is...

There has been significant debate in the surgical and medical communities regarding appropriateness of using aspirin alone for venous thromboembolism (VTE) prophylaxis following total knee arthroplasty (TKA).To determine acceptability vs anticoagulant reducing risk postoperative VTE patients undergoing TKA.Noninferiority study a retrospective cohort TKA cases submitted to Michigan Arthroplasty Registry Collaborative Quality Initiative at 29 member hospitals, ranging from small community...

The efficacy of tranexamic acid (TXA) in reducing blood loss and transfusion requirements total hip knee arthroplasty has been well established small controlled clinical trials meta-analyses. purpose the current study was to determine risks benefits TXA use routine orthopaedic surgical practice on basis data from a large, statewide registry.From April 18, 2013, September 30, 2014, there were 23,236 primary cases 11,489 completed registered Michigan Arthroplasty Registry Collaborative Quality...

Normative data are useful for assessing isometric shoulder strength in patients with bilateral abnormalities. The purpose of this study was to develop a normative database the clinically relevant positions and movements. Twenty combinations exertions postures-including flexion, extension, abduction, adduction, internal rotation, external rotation-were tested both dominant nondominant sides. Strength measured isometrically using modified Cybex II dynamometer. cross-sectional design included...

Abstract Optimization‐based models for prediction of muscle forces in the lumbar region torso are used to estimate acting on spinal motion segments, especially asymmetric tasks. The objectives this study were determine (a) which four model formulations best predicted electromyographic data, (b) difference muscular contribution compression force models, and (c) effect using lowest possible stress bound formulation. An approach investigation competing optimization was developed illustrated...

Study Design Prospective, single-group, repeated-measures design. Objectives To evaluate electromyographic (EMG) signal amplitude in the supraspinatus, infraspinatus, and deltoid muscles during pendulum exercises light activities a group of healthy subjects. Background There are numerous rehabilitation protocols used after rotator cuff repair. One most commonly these is pendulum. Patients can easily perform incorrectly, may also daily living without knowing that they be putting excessive...

A cross-sectional study of selected jobs in an aluminum smelter was conducted to assess the prevalence work-related musculoskeletal disorders (WMDs), and estimate their association with physical psychosocial characteristics jobs. structured interview exam were used health status participants, a self-administered questionnaire factors. Observational job analysis evaluate 37 potential risk Complete data available for 104 subjects. The WMDs on 0.8%, 14.9%, 11.6%, 17.4% neck, shoulder,...

Ulnar collateral ligament reconstruction of the elbow using a variety techniques has been successful in enabling overhead athletes with ulnar insufficiency to return competition. Most current postoperative rehabilitation programs begin period motion restriction, including limiting extension, that is followed by transition from strengthening an interval throwing program, Motion restrictions early may increase risk for contractures. There limited information support restrictions.(1) To...

Abstract Context: The body of knowledge concerning shoulder kinematics in patients with rotator cuff tears is increasing. However, the level understanding regarding how pain and tear size affect these kinematic patterns minimal. Objective: To identify relationships between associated a full-thickness tear, size, scapulohumeral rhythm (SHR) to determine whether serve as predictors SHR. Design: A test-retest design was used quantify SHR before after subacromial lidocaine injection. Correlation...