Glenohumeral Research Articles

Glenoid morphology variation between patients with hypermobile shoulder joints and controls: Identification of hyperlaxity-related morphologic bone changes

ObjectiveOur study aims to quantitatively determine the concavity of the glenoid articular surface in patients with hypermobile shoulders compared to those without. MethodWe examined medical records of shoulder CTs from 2017 to 2022, selecting 50 patients with clinical signs of joint hypermobility for our case group and 54 for our control group. Two blinded readers independently assessed the glenoid morphology, calculating the glenoid concavity angle (GCA) and evaluating the articular surface shape as concave, flat, or convex. They also recorded the presence and severity of glenoid dysplasia. We compared these assessments between groups. ResultsThe mean GCA was significantly lower in the hypermobile group (2.3 ± 3.7° and 2.3 ± 3.8°) versus controls (6.6 ± 3.3° and 5.3 ± 3.8°) (P < 0.05). Interobserver reproducibility was high (ICC=0.76). A stark difference in glenoid morphology was noted between groups (P < 0.001), with a majority of hypermobile patients having a flat or convex glenoid. GCAs decreased with increasing shoulder laxity and dysplasia. GCA showed 77–81 % sensitivity and 55–82 % specificity for detecting shoulder hyperlaxity with a 4° cutoff. ConclusionThere is a significant association between GCA and shoulder hyperlaxity, demonstrating diagnostic efficacy and substantial interobserver agreement. Clinical RelevanceGCA values lower than 4° warrant further clinical investigation for shoulder hyperlaxity and associated conditions, which is crucial for patient treatment planning.

Effects of Sling-Suspension-Based Active Shoulder Joint Exercise on Shoulder Joint Subluxation, Pain, Muscle Strength, and Upper Limb Function in Patients with Subacute Stroke.

Background and Objectives: We investigated the effects of sling-suspension-based active shoulder joint exercise training on shoulder joint subluxation, pain, muscle strength, and upper extremity function in patients with subacute stroke. Materials and Methods: Twenty-eight patients with subacute stroke were randomly assigned to either the sling-suspension-based active shoulder joint exercise (SASE) group (n = 14) or the motorized upper extremity exercise (MUEE) group (n = 14). The SASE group actively performed shoulder joint flexion, extension, abduction, adduction, external and internal rotation, and horizontal abduction and adduction using a sling suspension system, whereas the MUEE group underwent an exercise program using a motorized upper extremity exercise machine. All participants underwent a 4-week intervention with 30 min of exercise once a day for 5 days a week. Additionally, both groups received general physical therapy and functional electrical stimulation for 30 min twice a day for 5 days a week. Shoulder joint subluxation was measured by radiographic examination before and after training, and pain was evaluated in the splenius, upper trapezius, and infraspinatus muscles using pressure parameters. In addition, a manual muscle tester was used to assess the muscle strength of the shoulder joint flexors, extensors, abductors, adductors, and external and internal rotators, and the Fugl-Mayer Assessment (FMA) and Manual Functional Test (MFT) were used to evaluate upper extremity function. Results: A significant group-time interaction was observed for pain, with F-values of F(1, 26) = 7.470, p < 0.011 for the splenius and F(1, 26) = 9.623, p < 0.005 for the upper trapezius. A significant time-group interaction was observed for the muscle strength of the shoulder, with F-values of F(1, 26) = 13.211, p < 0.001; F(1, 26) = 4.974, p = 0.035 and F(1, 26) = 9.674, p = 0.004 for flexors, abductors, and external rotators, respectively. A significant time-group interaction was observed in the FMA, with F-values of F(1, 26) = 13.243, p < 0.001. When comparing the interaction effects between time and group for MFT scores, a significant difference was observed, with F-values of F(1, 26) = 32.386, p < 0.001. Conclusions: This study confirmed that sling-suspension-based active shoulder joint exercises are effective in improving shoulder joint subluxation, pain, muscle strength, and upper extremity function in patients with subacute stroke.

Assessing the contribution of different upper limb degrees of freedom to an unconstrained shoulder proprioception task

For the purpose of testing shoulder joint proprioception while controlling for axioscapular muscle recruitment, a novel shoulder thoracohumeral (TH) rotation joint position sense (JPS) measurement device was designed. This device was intended to measure shoulder TH rotation, while also implicitly constraining other upper limb degrees of freedom (DOF) and minimizing cutaneous sensation. The purpose of this study was to determine whether joint motion aside from shoulder TH rotation is being captured by the shoulder JPS measurement device. Upper limb kinematics were collected from 32 participants during joint angle matching trials using the shoulder JPS measurement device. Step wise multiple regression revealed that shoulder TH rotation (β-Humeral Rotation = 0.409, p < 0.001), and wrist deviation (β-Wrist Deviation = 0.104, p = 0.008) both contributed a significant unique variance in the prediction of shoulder JPS measurement device rotation. Findings suggest that seated, unconstrained shoulder TH rotation JPS testing protocols in literature may be confounded by contributions from joints both proximal and distal to the shoulder. Researchers should be aware of the limitations of both constrained and unconstrained shoulder TH rotation JPS testing protocols.

SSP: self-supervised pertaining technique for classification of shoulder implants in x-ray medical images: a broad experimental study

Multiple pathologic conditions can lead to a diseased and symptomatic glenohumeral joint for which total shoulder arthroplasty (TSA) replacement may be indicated. The long-term survival of implants is limited. With the increasing incidence of joint replacement surgery, it can be anticipated that joint replacement revision surgery will become more common. It can be challenging at times to retrieve the manufacturer of the in situ implant. Therefore, certain systems facilitated by AI techniques such as deep learning (DL) can help correctly identify the implanted prosthesis. Correct identification of implants in revision surgery can help reduce perioperative complications and complications. DL was used in this study to categorise different implants based on X-ray images into four classes (as a first case study of the small dataset): Cofield, Depuy, Tornier, and Zimmer. Imbalanced and small public datasets for shoulder implants can lead to poor performance of DL model training. Most of the methods in the literature have adopted the idea of transfer learning (TL) from ImageNet models. This type of TL has been proven ineffective due to some concerns regarding the contrast between features learnt from natural images (ImageNet: colour images) and shoulder implants in X-ray images (greyscale images). To address that, a new TL approach (self-supervised pertaining (SSP)) is proposed to resolve the issue of small datasets. The SSP approach is based on training the DL models (ImageNet models) on a large number of unlabelled greyscale medical images in the domain to update the features. The models are then trained on a small labelled data set of X-ray images of shoulder implants. The SSP shows excellent results in five ImageNet models, including MobilNetV2, DarkNet19, Xception, InceptionResNetV2, and EfficientNet with precision of 96.69%, 95.45%, 98.76%, 98.35%, and 96.6%, respectively. Furthermore, it has been shown that different domains of TL (such as ImageNet) do not significantly affect the performance of shoulder implants in X-ray images. A lightweight model trained from scratch achieves 96.6% accuracy, which is similar to using standard ImageNet models. The features extracted by the DL models are used to train several ML classifiers that show outstanding performance by obtaining an accuracy of 99.20% with Xception+SVM. Finally, extended experimentation has been carried out to elucidate our approach’s real effectiveness in dealing with different medical imaging scenarios. Specifically, five different datasets are trained and tested with and without the proposed SSP, including the shoulder X-ray with an accuracy of 99.47% and CT brain stroke with an accuracy of 98.60%.

Clinical comparison study of square flap method and five-flap Z-plasty technique for correction of post-burn axillary contractures: Analysis of length gain and evaluation of functional outcome

IntroductionWhile there is no consensus on the best surgical procedure for post-burn axillary contractures, it is crucial to consider the elongation rate along the scar axis as a useful measurement index for determining the optimal surgical approach. The square flap and five flap z-plasty techniques are commonly employed scar lengthening procedures to address scar contractures in the axilla. These approaches successfully disrupt the linear scar, leading to significant elongation while reducing transverse tension. Our study aims to compare the increase in band length and functional results of these two approaches for treating post-burn contractures in the axilla. MethodsA retrospective study was carried out utilizing data from 34 patients with mild-to-moderate band-like contractures located on the anterior or posterior axillary lines who underwent surgical correction through either the square flap method or five-flap z-plasty technique. The effectiveness of surgical methods was evaluated using two objective indices: improvement in contracture band length and improvement in abduction angle at the shoulder joint. ResultsAll patients achieved complete contracture release. There is no statistically significant difference between the two groups regarding the improvement in the degree of abduction postoperatively. Although there was a significant increase in the length of the contracture band postoperatively in both groups, the average increase in length for cases treated with a square flap was significantly greater than those managed with a five-flap Z-plasty (87.7 ± 44.8 % vs. 38.80 ± 11.119 %,) respectively. ConclusionThe square flap technique is considered a better alternative to the commonly used 5-flap Z-plasty method because it can achieve higher elongation in the contracture band, restore joint function, and create optimal shape when dealing with single linear band contractures over the axilla.

Shoulder girdle muscle abscess: Potential routes of spread and surgical management by a dual anterior approach

BackgroundSpontaneous infections involving muscles in the shoulder girdle are uncommon conditions rarely reported in the literature. The large musculature of shoulder girdle, complex communicating spaces into the periscapular region, and late glenohumeral joint involvement can cause delay in diagnosis of infections involving muscular portion of rotator cuff. The method of surgical drainage with involvement of scapulothoracic and subscapular spaces and prognosis can be challenging. MethodologyIn this descriptive study, we included patients with shoulder girdle muscle abscess and analyzed the spread in the shoulder girdle and arm through various pathways radiologically. Debridement of the abscess in the subscapular muscle and adnexa was done through the dual approach, one with deltopectoral approach for the shoulder girdle and another incision anterior to the latissimus dorsi muscle for inferior subscapular spaces and gravity-dependent drainage of collection. ResultsThe causative organism Staphylococcus aureus was isolated only in two patients out of four cases. In repeated collections, axillary and suprascapular nerve palsies were commonly encountered. Adequate debridement, antibiotic cover with vancomycin and clindamycin for six weeks, and rehabilitation restored normal functions of the shoulder in three patients. ConclusionUnsuspecting nature of the subscapular abscess and similarities with common shoulder conditions at initial presentation often led to extensive shoulder girdle involvement via subscapular space, subcoracoid recess, and scapulothoracic space to adjacent areas. The dual approach provides adequate access to drain the collections in subscapularis muscle, subscapular spaces, and shoulder girdle. Level of studyV.

Relationship between SLAP Lesions and Shoulder Joint Capsule Thickness: An MR Arthrographic Study.

Background and Objectives: This study aimed to evaluate the relationship between SLAP lesions and the shoulder joint capsule thickness via MR arthrography. Understanding the relationship between SLAP lesions and the joint capsule thickness is important because an increased capsule thickness may indicate chronic inflammation and contribute to persistent pain and dysfunction. These findings have significant clinical implications for the diagnosis, management, and treatment strategies of shoulder joint pathologies. Materials and Methods: We retrospectively analyzed the MR arthrography results of 78 patients who underwent shoulder imaging at Düzce University Medical Faculty between October 2021 and November 2024. The study included patients diagnosed with SLAP lesions and compared them with a control group without such pathology. Data on joint capsule thickness at the level of the axillary recess, SLAP lesion type, cuff pathology, and demographic information were collected and analyzed. Results: The study included 32 patients with SLAP lesions and 46 control subjects. The mean age of the patients was 44.75 ± 14.18 years, whereas the control group had a mean age of 38.76 ± 13 years. The patient group presented a significantly greater mean anterior capsule thickness (3.13 ± 1.28 mm vs. 1.72 ± 0.7 mm, p = 0.0001), posterior capsule thickness (3.35 ± 1.32 mm vs. 1.95 ± 1.06 mm, p = 0.0001), and maximum capsule thickness (3.6 ± 1.32 mm vs. 2.06 ± 1.01 mm, p = 0.0001) in the axillary recess. SLAP type 2 lesions were the most common type (43.76%) in the patient group. Conclusions: This study revealed a significant association between SLAP lesions and an increased shoulder joint capsule thickness. These findings suggest that MR arthrography is an effective tool for assessing the joint capsule changes associated with labral tears, contributing to the better diagnosis and management of shoulder joint pathologies in clinical practice.

Rotator Cuff Tears, Repairs, and Shoulder Arthroplasties Among Workers' Compensation Claimants: A 16-year study of workers' compensation claims from a large nationwide workers' compensation insurance carrier.

Rotator cuff repair (RCR) is increasingly being performed for both acute traumatic and degenerative tears of the rotator cuff, while total shoulder arthroplasty (TSA) is reserved for osteonecrosis of the humeral head, arthritis of the glenohumeral joint and failed RCR. To assess the incidence and patient characteristics of rotator cuff tears (RCTs), RCRs, and TSAs among workers' compensation (WC) claimants. 8,347 RCT indemnity claims filed to Accident Fund Group from 2007 to 2022 were studied. Over the study period, the percentages of RCTs increased from 41% to 65% among shoulder injury indemnity claimants, RCRs increased from 88% to 92% of RCTs and TSAs increased from 1% to 5%. RCT, RCR, and TSA have increased dramatically among WC claimants, age of the injured worker being the primary determinant of the increase.

Construction and verification of rehabilitation nursing program for shoulder and neck discomfort after thyroid cancer surgery: A pilot randomized controlled trial.

To develop a nursing program for the prevention and rehabilitation of shoulder and neck discomfort after thyroid cancer surgery based on the empowerment theory, and to evaluate the application effect of the program. The prevention and rehabilitation nursing program for shoulder and neck discomfort after thyroid cancer surgery was established by literature review and the Delphi method. Between July 2022 and January 2023, a total of 62 postoperative thyroid cancer patients were recruited and randomly allocated to either the intervention group (n = 31) or the control group (n = 31) in this randomized controlled trial. Comparisons of shoulder and neck function, self-efficacy, and quality of life between the 2 groups were performed using a 2-sample independent t test, Wilcoxon rank-sum test, and repeated-measures analysis of variance. At the end of the study, the control group and intervention group were 30 cases each completed the study. After the intervention, the self-efficacy score of the intervention group was higher than the control group (P < .05), and the score of emotional function, cognitive function, and overall health dimension of the intervention group was higher than the control group (P < .05). The pain dimension score of the intervention group was lower than the control group (P < .05). There were significant differences in the group and time effects of the total shoulder joint scores between the 2 groups (P < .05). This study demonstrated that the shoulder and neck rehabilitation nursing program can alleviate the symptoms of shoulder and neck discomfort and improve patients' self-efficacy and quality of life.

Relationship of Selected Kinematic Variables with the Performance of a Goal Kick Techniques in Football Goalkeeper

Introduction: A goal kick is awarded when the whole of the ball passes over the goal line, on the ground or in the air, having last touched a player of the attacking team, and a goal is not scored. The purpose of this study was to find out the relationship of selected angular kinematic variables with the performance of goal kick technique of soccer goalkeepers in Ethiopia&amp;apos;s higher premier league. Method: Purposive sampling technique was used for choosing highly skilled goalkeepers. In the present study, a total of seventeen male goalkeepers (18 to 30 years of age) who had participated in the Ethiopian premier league participated. Goal kick technique was divided into three phases, such as the stance phase, the execution phase and the follow-through phase. All goalkeepers were given three trials and the best trial was used for analysis. Each participant performed three goal kicks with maximum strength that were video recorded with a camera (nikon d3200) positioned 9 m away from the place of the kick at the height of 0.95m. The silicon coachpro 7 and kinovea software were used for analyzing the data. The Joint Point Method was used in order to obtain the values of selected angular kinematic variables by developing a stick figure. The height of the Center of Gravity was calculated by segmentation method. The relationship of selected angular &amp; linear kinematic variables with the performance of goal kick soccer goalkeeper was obtained by spearman rank correlation method. Conclusion: During stance phase, hip joint (left and right), ankle joint right, shoulder joint right and elbow joint left, do have a significant relationship with the performance of goal kick in soccer goalkeeper. At the time of execution phase, angular kinematic variables such as ankle joint left, hip joint right, shoulder joint right and elbow joint right do show a significant relationship with the performance of goal kick in soccer goalkeeper. Whereas the elbow joint left and wrist joint left were insignificant relationships. At the time of follow-through phase, ankle joint right, elbow joint left and hip joint were significant.

Effectiveness of minimally invasive internal fixation with locking plates for mid-shaft clavicle fractures

To explore effectiveness of minimally invasive internal fixation with locking plates for mid-shaft clavicle fractures. Between October 2022 and August 2023, 28 patients with mid-shaft clavicle fractures were treated by minimally invasive internal fixation with locking plates. There were 10 males and 18 females with a mean age of 46.2 years (range, 18-74 years). The fractures were caused by traffic accident in 16 patients, sports-related injury in 7 patients, and other injuries in 5 patients. According to Robinson classification, the fractures were classified as type 2A1 in 1 case, type 2A2 in 6 cases, type 2B1 in 15 cases, and type 2B2 in 6 cases. The interval between fracture and operation ranged from 5 hours to 21 days (median, 1.0 days). The pain visual analogue scale (VAS) score was 8.1±1.6. The VAS score at 3 days after operation and the occurrence of complications after operation were recorded. During follow-up, X-ray films were re-examined to observe the healing of the fracture; the shoulder joint function was evaluated according to the Constant-Murley score at 6 months, and the length of the incision scar (total length of the distal and proximal incisions) was measured. All operations were successfully completed without any subclavian vascular or nerve damage. All incisions healed by first intention. The VAS score was 1.2±0.7 at 3 days after operation, and there was a significant difference in VAS score between pre- and post-operation ( t=8.704， P<0.001). At 1 week after operation, the patient's shoulder was basically painless, and they resumed normal life. All patients were followed up 12-20 months (mean, 13.3 months). X-ray films showed that the bone callus began to form at 2-4 months after operation (mean, 2.7 months). There was no delayed healing or non healing of the fracture, and no loosening or fracture of the internal fixators during follow-up. At 6 months after operation, the mean total incision length was 1.5 cm (range, 1.1-1.8 cm); no patient complained of numbness or paresthesia on subclavicular region or anterior chest wall. The Constant-Murley score of shoulder joint function was 93-100 (mean, 97.6). Minimally invasive internal fixation with locking plates is a good surgical method for treating mid-shaft clavicle fractures, with simple operation, minimal trauma, good postoperative results, and high satisfaction.

Handrim kinetics and quantitative ultrasound parameters for assessment of subacromial impingement in wheelchair users with pediatric-onset spinal cord injury

BackgroundMost manual wheelchair users with pediatric-onset spinal cord injury (SCI) will experience shoulder pain or pathology at some point in their life. However, guidelines for preservation of the upper limb in children with SCI are limited. Research questionWhat are the relationships between manual wheelchair handrim kinetics and quantitative ultrasound parameters related to subacromial impingement in individuals with pediatric-onset SCI? MethodsSubacromial impingement risk factors including supraspinatus tendon thickness (SST), acromiohumeral distance (AHD), and occupation ratio (OR; SST/AHD) were measured with ultrasound in 11 manual wheelchair users with pediatric-onset SCI. Handrim kinetics were acquired during the stroke cycle, including peak resultant force (FR), peak rate of rise of resultant force (ROR) and fractional effective force (FEF). Variability of handrim kinetics was computed using the coefficient of variation and linear regression was performed to assess correlations between handrim metrics and quantitative ultrasound parameters. ResultsPeak resultant force significantly increased 1.4 % and variability of FEF significantly decreased 8.0 % for every 0.1 cm increase in AHD. FEF decreased 3.5 % for every 0.1 cm increase in SST. Variability of peak resultant force significantly increased 3.6 % and variability of peak ROR of resultant force significantly increased 7.3 % for every 0.1 cm increase in SST. FEF variability significantly decreased 11.6 % for every 0.1 cm increase in SST. Peak ROR significantly decreased 1.54 % with every 10 % increase in OR. FEF variability significantly decreased 1.5 % with every 10 % increase in OR. SignificanceThis is the first study to investigate relationships among handrim kinetics and shoulder structure in manual wheelchair users with pediatric-onset SCI. Associations were identified between subacromial impingement risk factors and magnitude and variability of wheelchair handrim kinetics. These results indicate the critical need to further explore the relationships among wheelchair handrim kinetics, shoulder joint dynamics, and shoulder pathology in manual wheelchair users with pediatric-onset SCI.

Effect of low-intensity pulsed ultrasound on postoperative rehabilitation of rotator cuff tears: Protocol for a systematic review and meta-analysis.

Rotator cuff tears are a common shoulder injury that significantly impacts patients' daily lives and work abilities. Although surgical treatment methods for rotator cuff tears have been continuously improved with advances in medical technology, postoperative rehabilitation remains challenging. Therefore, finding effective rehabilitation treatments is crucial for improving patient prognosis and enhancing quality of life. This study will aim to systematically evaluate the impact of low-intensity pulsed ultrasound (LIPUS) on postoperative rehabilitation of rotator cuff tears, comprehensively assessing the efficacy and safety of LIPUS in postoperative recovery. This protocol will search multiple databases including PubMed/MEDLINE, Embase, Cochrane Library, CNKI, Scopus, and Web of Science to identify randomized controlled trials related to LIPUS for postoperative rehabilitation of rotator cuff tears. The search will encompass literature published from the inception of the databases up to April 2024. Methodological quality assessment and data extraction will be conducted using the Cochrane Handbook for Systematic Reviews of Interventions and PRISMA guidelines. Meta-analysis will be performed on appropriate studies using either random-effects or fixed-effects models, and subgroup analyses will be conducted to explore potential heterogeneity. Studies meeting the inclusion criteria will be included in the analysis. All analyses will be performed using Stata version 16.0. The incidence of rotator cuff tear rates will be assessed by imaging techniques such as MRI or ultrasound. Pain intensity will be scored using standardized pain assessment scales, such as the Visual Analog Scale (VAS). Improved range of motion (ROM) in shoulder flexion, abduction, and rotation. Functional outcomes will be evaluated using effective measures such as Constant-Murley scores (CMS) and shoulder joint scores by American Shoulder and Elbow Surgeons (ASES). Adverse events associated with LIPUS therapy, including skin irritation, increased pain, or any other complications. Subgroup analysis will also be carried out if possible. Following the meta-analysis, we will assess the overall effect of LIPUS on postoperative rehabilitation of rotator cuff tears, and further explore its impact on aspects such as pain relief, functional improvement, and postoperative complications. It is anticipated that this study will provide comprehensive evidence regarding the role of LIPUS in postoperative rehabilitation of rotator cuff tears, guiding clinical practice and future research. The resultant manuscript will be submitted for publication in a peer-reviewed journal. CRD42024530798.

Physiotherapist-supervised exercises versus physiotherapist-prescribed home exercises for treating partial thickness rotator cuff tears: a randomized controlled trial

BackgroundPartial thickness rotator cuff tears significantly affect physical and psychosocial well-being This study aimed to compare the efficacy of physiotherapist-supervised exercise and physiotherapist-prescribed home exercise programs on physical and psychosocial health measures in partial thickness rotator cuff tears. MethodsSeventy patients with partial thickness rotator cuff tears (44 female; mean age, 50.1 ± 5.2 years) were divided into two groups. Both the physiotherapist-supervised exercise group (Group 1, n=35) and physiotherapist-prescribed home exercise group (Group 2, n=35) received a program consisting of glenohumeral joint range-of-motion, stretching, and strengthening exercises (twice a week for eight weeks). The primary outcome measures were the modified Constant-Murley Score (mCMS) and the Hospital Depression and Anxiety Scale (HADS). Secondary outcome measures were the visual analog scale (VAS), active range of motion (AROM), Pain Catastrophizing Scale (PCS), Pittsburg Sleep Quality Index (PSQI), Short Form-12 (SF-12), and Global Rating of Change Scale (GRC). Patients were assessed at baseline and the end of the treatment. The significance level was adjusted to 0.025 after the Bonferroni correction. ResultsBoth groups showed significant improvements in all measures after treatment. There were no statistically significant group-by-time interactions for the mCMS (F=12.47, p=0.03) and the HADS (F=0.89, p=0.14 for depression; F=0.73, p=0.44 for anxiety). However, the improvement in the mCMS was clinically meaningful in both groups. The overall group-by-time interaction was significant for the VAS activity (p=0.004), shoulder flexion (p=0.01) and abduction (p=0.02) AROM, and PCS (p=0.005) in favor of Group 1. ConclusionExercise effectively improves physical and psychosocial health measures in partial thickness rotator cuff tears when delivered in the clinic or at home. However, exercise is more effective for activity pain, AROM, and pain catastrophizing when delivered in the clinic, highlighting the effectiveness of the physiotherapist-supervised exercise program.

Health-related outcomes with supervised exercise and myofascial release versus only supervised exercise in subacromial pain syndrome: a randomized controlled single-blind study

BackgroundMyofascial tissue plays a critical role in shoulder joint mobility disorders. Myofascial release therapy (MFR) is frequently utilized to restore the extensibility of fascial tissue and is considered beneficial for various clinical conditions such as low back pain and ankle injuries. However, no studies have yet evaluated the effects of MFR on periscapular muscles activation and shoulder mobility in patients with subacromial pain syndrome(SAPS).ObjectiveThe purpose of this study was to compare the effectiveness of MFR combined with supervised exercise(SE) and SE alone in patients with SAPS.DesignAssessor-blinded randomized controlled trial.SettingSir Run Run Shaw Hospital, Zhejiang University School of Medicine.SubjectsSubacromial pain syndrome patients.MethodsFifty participants were divided into two groups: SE group and MFR + SE group, each group 25 cases. Both treatment methods were performed 5 times a week for 4 weeks.Main measuresShoulder pain severity was assessed by visual analog scale (VAS); shoulder range of motion (ROM) by a goniometer; functionality by shoulder Pain and Disability Index (SPADI); and periscapular muscles activation by sEMG. All measurements were evaluated both pre- and post-treatment.ResultsAn ANOVA analysis indicated no significant group by time interactions for flexion ROM and resting VAS (p > 0.05). However, significant group by time interactions were found for SPADI, abduction and external rotation ROM, and activity VAS (p < 0.05). Post-hoc tests revealed significant improvements in SPADI, abduction and external rotation ROM, and activity VAS in both groups compared to pre-treatment (p < 0.05). Additionally, there were significant group by time interactions for the sEMG values of the upper trapezius and serratus anterior (p < 0.05). Post-hoc tests showed that compared to pre-treatment, the MFR + SE group had decreased upper trapezius sEMG values and increased serratus anterior sEMG values(p < 0.05), while the SE group showed increased serratus anterior sEMG values(p < 0.05). After the 4-week intervention, there were significant between-group differences in SPADI, abduction and external rotation ROM, activity VAS, and sEMG values of the upper trapezius and serratus anterior(p < 0.05).ConclusionFour weeks of MFR combined with SE can increase shoulder ROM, improve pain, and thus enhancing functional activities in patients with SAPS. Additionally, it can further improve the balance between the upper trapezius and serratus anterior to improve the dynamics of the periscapular muscles.Trial registry numberChiCTR2200061054. Date of registration 15/06/2022.

Reduced Clavicle Length Indicates the Severity of Scapular Misalignment in Obstetric Brachial Plexus Lesions.

(1) Background: Although most brachial plexus birth palsies show some spontaneous recovery, secondary operations are likely to follow. Accordingly, due to the loss of muscle innervation, the growth of the affected limb and the shoulder girdle is reduced. This is associated with pathological scapula positioning and rotation. The objective of this work was to clarify the relationship between length differences of the two clavicles and different types of scapular dyskinesia. (2) Methods: Twenty-five patients suffering from brachial plexus birth palsy were included in this retrospective study. There were eighteen female and seven male patients with a mean age of 10 years (2 to 23 years). CT scans of the thoracic cage, including both shoulder joints and both clavicles, were obtained preoperatively between 2010 and 2012. Radiographic measurements were taken of the axial plane and 3D reconstructions were produced. Functional evaluations of possible movement and scapular dyskinesia were performed. (3) Results: We found an increasing difference in the length of the clavicle (both in absolute and relative terms) in the children with more pronounced scapular dyskinesia. Additionally, with increasing clavicle length differences, the scapula was positioned in a deteriorated angle compared to the healthy side. Significant positive correlations were identified for the age and absolute difference of the clavicle length and the length and width of the scapula on the affected side. (4) Conclusion: Scapular dyskinesia, which is a common finding in brachial plexus birth palsy, is strongly related to reduced clavicle growth. Reduced clavicle length (which is a relatively easily examinable parameter) compared to the healthy side can be used to estimate the extent of scapular malpositioning on the thoracic cage. The extent and severity of scapular dyskinesia increases with augmented differences in the length of the clavicle.

The Efficacy of Triple Shoulder Injection with Steroids and Ozone in the Treatment of Chronic Shoulder Pain and Range of Motion Limitation

Objective: This study aimed to evaluate and compare the therapeutic effects of fluoroscopy-guided triple shoulder injections with steroids and, a combination of steroids and ozone. Methods: Data were retrospectively collected from the files of 70 patients diagnosed with non-specific chronic shoulder pain and received triple shoulder injections. The patients were divided into two groups. One group included triple shoulder injections with steroids under fluoroscopic guidance, while the other group included combination of steroids and ozone. Pain intensity was evaluated with the Visual Analog Scale (VAS), the patient's quality of life and functionality were assessed using the Shoulder Pain and Disability Index (SPADI), and the active range of motion (ROM) of shoulder abduction, external rotation, and flexion were measured by goniometry. Beck Depression Inventory (BDI) was used to measure the severity of depression before the procedure. All measurements were recorded at baseline and 1, 3, and 6 months after the procedure. Results: Baseline characteristics were similar in both groups. There was no statistical difference in VAS scores between the two groups at baseline, 1st, and 3rd months. However, in the 6th months, the VAS scores of patients treated with steroids plus ozone were significantly lower than those of patients treated with steroids (P&lt;0.001). Both groups showed significant improvements in SPADI pain, disability, and total subscores compared to pre-treatment values (P &lt; 0.001). There was a significant improvement in the ROM of the shoulder joint in both groups (p&lt;0.001). However, patients who received ozone and steroid treatments showed a significantly greater increase in SPADI and ROM of shoulder joints in the 6th months (p&lt;0.001). There was a positive correlation between BDI score and pain duration, and the severity of depression had no statistically significant effect on VAS scores. Conclusion: Results of this study revealed that triple shoulder injection with steroids or a combination of steroids and ozone proved to be an effective therapeutic approach for patients suffering from shoulder pain and limited mobility. The combination of ozone with steroids may lead to better results than using steroids alone. Furthermore, a long duration of pain increases the risk of chronic depression in patients.

Variations of musculocutaneous nerve – A cadaveric study

Background: Musculocutaneous nerve (MCN) is a mixed nerve arising from the lateral cord of brachial plexus having root values C5, 6, and 7. It supplies the muscles of the flexor compartment of the arm namely; coracobrachialis, most part of brachialis and both heads of biceps brachii. It is cutaneous to the lower lateral part of forearm. Variations in the origin, course, branching pattern, termination, and connections of MCN are very common. Knowledge about these variations is important while evaluating unusual presentations of peripheral nerve injuries, during surgical procedures such as arthroscopy of shoulder joint, corrections of fracture humerus, brachial plexus block, and so on. Aims and Objectives: The study was conducted to find out any variations in the origin, course, branching pattern of the MCN. The secondary objective was to understand about the communication of the MCN with any other nerve. Materials and Methods: A descriptive study was conducted in 60 upper limb specimens dissected from 10% formalin embalmed 30 cadavers (adult) in the Department of Anatomy, Government Medical College, Kottayam. All limbs were carefully dissected and studied about the origin, course, termination, and variations of MCN. Results: Out of 60 specimens studied, in 46 specimens MCN Originate from lateral cord, eight from medial cord, and in six from the lateral root of the median nerve (MN). In 52 specimens, MCN supplies coracobrachialis but only in 34 it pierces this muscle. In four specimens, there is a communication between MCN and MN was seen. Conclusion: The MCN has significant variations and knowledge of these variations is clinically important in diagnosis and management of peripheral nerve injuries as well as surgical interventions in the arm.

Interobserver reliability of shoulder radiographic findings and correlation to MRI: a preliminary case series.

The aim of this study was to evaluate the interobserver reliability of measurements of the Acromiohumeral Distance (AHD) first described by Golding et al., the Critical Shoulder Angle (CSA), the Acromion Index with Glenoid Humeral (GH) and Glenoid Acromial (GA) distances, following the measuring method by Nyffeler et al., the Lateral Acromion Angle (LAA), as well as the morphology of the acromion according to Bigliani and the humeral head position according to Maloney in X-rays and MRI. Furthermore, the study assessed the correlation of measurement results in X-ray with those in MRI for AHD, CSA, GA, GH, AI, and LAA. A total of 187 patients who underwent shoulder joint X-ray and MRI examinations from 09/2016 to 05/2023 were included in the study. Patients with poor imaging quality, arthrosis or radical prior surgeries, like shoulder prosthetic surgery, status post humerus fractures, that have undergone surgery and therefore changed the anatomical features were excluded, what lead to a total study population of 78. X-ray measurements were performed by two observers in the true anteroposterior view, so that the humeral head and the glenoid are shown without overlap, providing a clear view into the joint space. MRI measurements were performed in oblique coronal MRI slices, using the most accurately depicted glenoid surface as a landmark. Interobserver measurement results showed a significance with p < 0.001 for the assessment of acromion type according to Bigliani, humeral head offset assessment according to Maloney, and AHD. No significance was found for interobserver reliability in measuring LAA. Additionally, there was a high correlation of measurement results in X-ray with measurements in MRI for, CSA, GH/GA, and consequently AI, a good correlation for AHD but no correlation could be shown for LAA. These findings provide valuable insights into the robustness of radiological parameters for evaluating shoulder pathology, offering promising prospects for clinical applications and further research. Nevertheless, the specific methodological considerations and patient characteristics should be taken into account when interpreting the results to ensure their accurate application in clinical practice.

Investigation of the effectiveness of a complex injury prevention programme among young swimmers

AbstractPurposeThe training load required at elite level can lead to shoulder pain even among the youngest swimmers, thus, besides modern water training plans and swimming technique development, the planning of dryland training with a preventive approach is of the utmost importance. The aim of the present study was to map kinetic patterns and sports injury risk factors among young competitive swimmers (between 9 and 12 years of age) and to investigate the effectiveness of a complex injury prevention programme on dry land.Materials and methodsA total of 37 swimmers (19 girls and 18 boys, aged 10.8 ± 1 yrs) participated in the research. We performed a physical examination using the PostureScreen11.1 application, a digital goniometer, a manual dynamometer, and functional and diagnostic orthopaedic tests. The swimmers were divided into a trained group and a control group. A three-month complex injury prevention programme was developed for the trained group. We analysed our data using Statistica for Windows.ResultsWe found that 19% of the swimmers had experienced shoulder pain since starting swimming. We also found several postural faults, a reduction in the rotational arc of motion in the shoulder joint, rotational muscle imbalance, serratus anterior weakness, and scapular dyskinesia. Following the programme, swimmers in the trained group showed significant improvement in the rotational arc of the shoulder joint, internal rotational range of motion, rotational muscle strength, and upper limb stability. Progress was also made in many other areas, although these results were not significant.ConclusionsAs shoulder pain and its risk factors can be observed even among the youngest competitors, a dryland training plan tailored to this group can reduce the occurrence of sports injuries.