Demographics and Outcomes of Glenohumeral Dislocations in Individuals With Elevated Body Mass Index.

INTRODUCTION: No specific study has investigated the characteristics and outcomes of anterior shoulder dislocations in morbidly obese individuals. The purpose of this study was to describe shoulder dislocations in patients with body mass index (BMI) greater than 40. METHODS: A retrospective review was conducted to identify patients aged 18 years and older with a BMI ≥40 who presented with a shoulder dislocation in a single institution from 2000 to 2020. Dislocation patterns, associated injuries, treatment modalities, and associated complications were recorded. RESULTS: A significant increase was noted in the number of patients with BMI greater than 40 presenting per year (r2 = -0.831, P < 0.01) over the past 20 years. A significant increase was noted in the average BMI per year in this population (r2 = 0.504, P = 0.028). Fifteen patients (19.5%) experienced at least one recurrent dislocation episode. Ten patients had a Bankart lesion that was associated with an elevated BMI (P = 0.04). Nine patients (11.7%) sustained an associated neurologic injury (no association with BMI). CONCLUSIONS: Over time, there has been an increase in shoulder dislocations in morbidly obese individuals in the United States, alongside an overall increase in the average BMI of patients who present with shoulder dislocations.

Exploring temporal trends and burden of traumatic shoulder dislocation: a global perspective.

Objective: To explore the geographical and temporal trends of traumatic shoulder dislocation, describe the association between the social and demographic factors and the health burden due to traumatic shoulder dislocation, and further investigate its causes. Methods: Data on traumatic shoulder dislocation was collected from the Global Burden of Disease 2019, spanning the years 1990 to 2019. The epidemiology and disease burden were examined at global, regional, and national levels. Additionally, the age and gender patterns were analyzed, followed by an investigation into the primary causes. Lastly, the study studied the correlation between age-standardized rates and the socio-demographic index (SDI). Results: Over a span of 30 years, both the crude and age-standardized rates of incidence and years lived with disability (YLDs) rates for all genders displayed a slight fluctuating downward trend. The incidence and YLDs rates in males were consistently higher than those in females. The study analyzed both incidence and YLDs rates of the global, regional, and national of traumatic shoulder dislocations from 1990 to 2019, as well as the temporal trends. Among males, the highest incidence rate was observed in young adulthood, while females exhibited the highest incidence rate in old age. This pattern was mirrored in the YLDs rate. Falls were identified as the main cause contributing to the disease burden related to traumatic shoulder dislocations. Moreover, a positive correlation was found between the age-standardized rates and SDI. Conclusion: The disease burden of traumatic shoulder dislocation has not significantly decreased from 1990 to 2019. The incidence and YLD rates are associated with age, gender, and SDI. A thorough examination of the disease burden contributes to the efficient allocation and utilization of resources, as well as the development of targeted and effective intervention strategies.

Lesion prevalence and patient outcome comparison between primary and recurrent anterior shoulder instability.

BACKGROUND: The purpose of this study was to compare lesion prevalence and treatment outcomes in patients with primary and recurrent anterior shoulder instability. METHODS: Patients who were admitted to the institution with a diagnosis of anterior shoulder instability and who underwent arthroscopic surgery between July 2006 and February 2020 were retrospectively evaluated. Minimum follow-up duration of the patients was 24 months. The recorded data and magnetic resonance imaging (MRI) of the patients were examined. Patients aged ≥40 years, with a history of shoulder region fracture, inflammatory arthritis, a history of epilepsy, multidirectional instability, nontraumatic dislocation, and off-track lesions were excluded from the study. Shoulder lesions were documented and patient outcome evaluation was made with the Oxford Shoulder Score (OSS) and visual analog scale (VAS). RESULTS: A total of 340 patients were included in the study. The mean age of patients was 25.6 years (±6.49). The recurrent instability group had a significantly higher rate of anterior labroligamentous periosteal sleeve avulsion (ALPSA) lesions compared to the primary instability group (40.6% vs. 24.6% respectively) (P = .033). Twenty-five patients (43.9%) had superior labrum anterior and posterior (SLAP) lesions in the primary instability group and 81 patients (28.6%) had SLAP lesions in the recurrent instability group (P = .035). OSS increased for both primary (from 35 [16-44] to 46 [36-48]) (P = .001) and recurrent instability groups (from 33 [6-45] to 47 [19-48]) (P = .001). There was no significant difference between the groups regarding postoperative VAS and OSS scores (P > .05). CONCLUSIONS: Successful results were obtained in patients younger than 40 years with both primary and recurrent anterior shoulder instability after arthroscopic treatment. ALPSA lesion prevalence was higher whereas SLAP lesion prevalence was lower in patients with recurrent instability. Although the postoperative OSS was comparable between the patient groups, the failure rate was higher in the recurrent instability patients.

Trends and projections in surgical stabilization of glenohumeral instability in the United States from 2009 to 2030: rise of the Latarjet procedure and fall of open Bankart repair.

BACKGROUND: Advances in surgical techniques have improved the ability to address recurrent glenohumeral instability via arthroscopic capsulolabral repair and bone-restoring procedures such as the Latarjet procedure. Given the paucity of studies analyzing temporal trends in the surgical management of glenohumeral instability, the purpose of this study was to assess trends in the treatment of anterior, posterior, and multidirectional instability over a 10-year period and model projections to 2030. METHODS: Using the IBM Watson MarketScan national database, we identified all patients who underwent glenohumeral instability procedures from 2009 to 2018. Procedures were identified using Current Procedural Terminology codes for open Bankart, Latarjet, anterior bone block, posterior bone block, multidirectional capsular shift, and arthroscopic Bankart procedures. Sample weights provided by the database were used to calculate national estimates. US Census Bureau annual population data were used to calculate incidence. Future projections to 2030 were modeled using Poisson and linear regression. RESULTS: There were an estimated 446,072 glenohumeral instability cases from 2009 to 2018. The per capita incidence (per 100,000) remained constant, from 14.8 in 2009 to 14.5 in 2018. Arthroscopic Bankart procedures comprised the highest number of procedures throughout the study period, accounting for 89% of all procedures in 2009 and 93% in 2018. The number of open Bankart procedures decreased by 65% from 2009 to 2018, whereas the number of Latarjet procedures showed a 250% increase over the same period. Patient demographics did not change over the study period, and male patients aged 18-25 years comprised the largest demographic group undergoing anterior instability procedures. Multidirectional instability procedures exhibited the least pronounced sex differences. Future modeling from 2018 to 2030 projected a continued steady rise in arthroscopic Bankart procedures (from 40,000 to 49,000 cases/yr), rapid growth in Latarjet procedures (from 1370 to 4300 cases/yr), and continued decline in open Bankart procedures (from 1000 to 250 cases/yr). CONCLUSIONS: Arthroscopic Bankart repair continues to be the most common glenohumeral instability procedure in the United States. From 2009 to 2018, the incidence of open Bankart procedures declined whereas the incidence of Latarjet procedures markedly increased. Future projections to 2030 mirrored these findings. These data may provide an enhanced understanding of the evolution of surgical treatment of glenohumeral instability within the United States, laying the foundation for continued prospective studies into the appropriate indications and advancements in surgical techniques.

Epidemiology of Primary Shoulder Dislocations. A Cohort Study from a Large Health Maintenance Organization: 2004 to 2019.

BACKGROUND: Previous epidemiological studies on shoulder instability evaluated specific and relatively small subgroups of patients. OBJECTIVES: To determine the incidence rate of primary shoulder dislocations. METHODS: Cohort analysis of electronic health records from 2004 to 2019 was conducted in a urban district of a major health maintenance organization (HMO) in Israel. Patients presented with primary shoulder dislocation that was treated with closed reduction in any medical facility within the district. Overall incidence density rates (IDR) of primary shoulder dislocations and stabilization surgeries were determined. RESULTS: Over a period of 16 years 13,158 patients underwent closed reduction of primary shoulder dislocation. Of those, 712 shoulder stabilization surgeries were performed (5%). The IDR of primary shoulder dislocations were 124 per 100,000 person-years. The IDR of primary shoulder stabilizations were 7 per 100,000 person-years. The peak in the number of dislocations was observed in those 20-29 years old and ≥ 60 years of. In patients under 59 years old, dislocations were more common in men. In those ≥ 60 years of age, dislocations were more common in women. Most shoulder stabilization surgeries were performed on young patients. The annual mean time from the first dislocation to stabilization surgery linearly declined to 6 months in 2019. CONCLUSIONS: The IDR of primary shoulder dislocations calculated from the largest HMO in Israel were 124 per 100,000 person-years. Shoulder dislocations had bimodal age distribution. Overall, 5% of the patients (mainly young) with shoulder dislocations underwent shoulder stabilization surgery during the study period.

First-time traumatic anterior shoulder dislocation: current concepts.

The management of first-time traumatic anterior shoulder dislocations has been a topic of extensive study yet remains controversial. Development of a treatment plan requires an understanding of patient-specific considerations, including demographics, functional demands, and extent of pathology. Each of these can influence rates of recurrence and return to activity. The purpose of this review is to provide a framework for decision-making following a first-time anterior shoulder dislocation, with particular focus on the high-risk young and athletic population. A summary of surgical treatment options and their outcomes is outlined, along with future biomechanical and clinical perspectives.

Clinical Diagnosis of the Infantile Shoulder Subluxation in Residual Brachial Plexus Birth Injury and Its Correlation With Ultrasound Diagnosis.

INTRODUCTION AND AIMS OF STUDY: Timely detection of shoulder subluxation in infants with brachial plexus birth injury (BPBI) is essential to prevent the progression of glenohumeral deformity. Shoulder ultrasonography (USG) is routinely used to detect an infantile subluxation/dislocation, but its use is limited because of the paucity of expert radiologists in developing countries. The aim of this study was to determine the clinical examination predictors to determine shoulder subluxation in patients with BPBI correlating with ultrasound confirmation. METHODS: We prospectively studied children who presented to our hospital between 2017 and 2021 diagnosed as brachial plexus birth injury. In patients developing internal rotation contracture of the shoulder, we looked for 3 standard clinical signs: reduced passive external rotation <60 degrees, deep anterior crease (DAC) and relatively short arm segment. Shoulder subluxation was defined as USG measurement of alpha angle>30 degrees and ossific nuclei of the humerus lying behind the dorsal scapular line. Sensitivity and specificity were used to assess their efficacy in clinical diagnosis of shoulder subluxation in different groups. The predicted probability of shoulder subluxation from each prediction rule was compared with actual distributions based on USG confirmation. RESULTS: Of the 58 BPBI infants who developed PER<60 degrees at the shoulder, 41 had USG confirmed shoulder subluxation. The 2 independent predictors of shoulder subluxation (PER<45 degrees and DAC) were identified in the current patient population based on data analysis. The presence of short arm segment is a very specific marker of shoulder subluxation but not sensitive. The predicted probability of shoulder subluxation from the prediction rule combining all the 3 markers were similar to the actual distributions in the current patient population. CONCLUSIONS: PER<45 degrees and presence of deep anterior crease are clinical markers indicating shoulder dislocation in patients with BPBI developing reduced external rotation at the shoulder. On the basis of the proposed clinical diagnosis algorithm, the above markers along with the selective use of USG can help in early detection and treatment of infantile shoulder dislocation.

Prevalence and risk factors for nerve injury following shoulder dislocation.

BACKGROUND: The glenohumeral joint dislocation can be associated with major nerve injury. The reported prevalence and risk factors for major nerve injury are variable and this injury can have a severe and life-long impact on the patient. The objectives of this study were to analyse the prevalence of major nerve injury following shoulder dislocation and examine risk factors. Management and outcomes of nerve injury were explored. METHODS: A 1 year retrospective cohort study of 243 consecutive adults who presented with a shoulder dislocation was performed. Data were collected on patient demographics, timings of investigations, treatment, follow-up, and nerve injury prevalence and management. The primary outcome measure was prevalence of nerve injury. Risk factors for this were analysed using appropriate tests with Stata SE15.1. RESULTS: Of 243 patients with shoulder dislocation, 14 (6%) had neurological deficit. Primary dislocation (p = 0.004) and older age (p = 0.02) were significantly associated with major nerve injury. Sex, time to successful reduction and force of injury were not associated with major nerve injury in this cohort. Patients with nerve injury made functional recovery to varying degrees. Recurrent shoulder dislocation was common accounting for 133/243 (55%) attendances. CONCLUSIONS: Shoulder dislocation requires careful assessment and timely management in the ED. A 6% rate of nerve injury following shoulder dislocation was at the lower border of reported rates (5-55%), and primary dislocation and older age were identified as risk factors for nerve injury. We emphasise the importance of referring patients with suspected major nerve injury to specialist services.

Epidemiology of primary shoulder dislocations requiring surgery: A cohort study from a major trauma center during 7 years.

PURPOSE: The epidemiology of shoulder instability in the general population is lacking. The aim of the current study was to determine the incidence rate of primary shoulder dislocations requiring surgical interventions in a major trauma center within a large maintenance organization. METHODS: A retrospective cohort analysis of electronic health records database from 1 January 2014 and 31 December 2020 was conducted in major rural trauma center. This study included all patients aged 10 years or older with a primary shoulder dislocation that were treated with closed reduction in the emergency room department. An overall incidence density rates (IDR) (per 100,000 person-years) of primary shoulder dislocations and stabilization surgeries were determined for the entire cohort. The data was used to evaluate the age-specific and gender-specific epidemiology. RESULTS: During the study period of 7 years there were 1,302 patients who underwent closed reduction after a primary shoulder dislocation (mean age 45 years). Of those, a total of 106 shoulder stabilization surgeries (8%) were performed. The IDR of primary shoulder dislocations was 179 per 100,000 person-years. The IDR of primary shoulder stabilizations was 15 per 100,000 person-years. The peak in number of dislocations was observed in the age groups of 20-29 years and over 60 years. In the age groups under 59 years dislocations were more common in men while in ages over 60 years dislocations were more common in women. The vast majority of shoulder stabilization surgeries were performed in young patients (age under 39 years). CONCLUSION: The IDR of primary shoulder dislocations calculated from a major trauma center of the largest health maintenance organization in Israel was 179 per 100,000 person-years. Shoulder dislocations had bimodal age distribution. Overall, eight percent of the patients (mainly young) with shoulder dislocations underwent shoulder stabilization surgery during the study period.

Shoulder Dislocation Incidence and Risk Factors-Rural vs. Urban Populations of Poland.

(1) Background: The aim of this study was to analyze the incidence of shoulder dislocation and to estimate non-modifiable risk factors in rural and urban subgroups in Poland. (2) Methods: The study covered the entire Polish population, divided into urban and rural subgroups and observed between 1 January 2014 and 31 December 2014. The study population consisted of Polish patients with a diagnosis of shoulder dislocation (S43.0) in accordance with the International Statistical Classification of Diseases and Related Health Problems (ICD-10). Records were obtained from the public health care provider National Health Found (Narodowy Fundusz Zdrowia, NFZ). Based on these data, we assessed shoulder dislocation incidence and risk rates, stratifying the study sample by sex, age and place of residence (rural or urban) using the Central Statistical Office (GUS) personal territorial code (TERYT). (3) The incidence was 25.97/100,000 person-years in rural areas and 25.62/100,000 person-years in urban areas. We did not find significant differences in the incidence between the two subgroups. The highest incidence (75.12/100,000 person-years) and the highest risk for shoulder dislocation were found among subjects 80+ years old living in urban areas. Furthermore, men in the third decade of their life living in urban areas showed the highest risk (OR = 7.8, 95% CI; 6.44-9.45, p < 0.001). In both subgroups, the likelihood of shoulder dislocation was significantly lower for the female sex and among children ≤9 years old. However, girls living in rural areas presented with a significantly higher likelihood for dislocation compared with their peers living in urban environments. (4) Conclusions: No significant difference in the incidence rate of shoulder dislocation between Polish residents living in rural and urban areas emerged. The highest incidence was observed among female subjects 80+ years old living in urban environments. The highest risk was found among men in the third decade of their life living in urban areas. In addition, girls in the first decade of their life living in rural areas had more shoulder dislocations than girls living in urban environments. Shoulder dislocation is dominant in female subjects aged 70-79 living in rural areas and in females 80+ years old living in urban areas.

[Injuries of the shoulder in winter sports]. / Wintersportverletzungen am Schultergelenk.

Skiing as a sport has come a long way from the first competitive event in Norway in 1767 to about 200 million skiers today worldwide. With Germany alone recording around 8000 injuries annually, there is an increased need for awareness for winter-sport-related injuries and their management. According to the latest report by "Auswertungsstelle für Skiunfälle" (ASU, evaluation center for ski accidents), shoulder injuries alone account for more than 20% of injuries to all body regions (men 26.1% and women 13%). The most common injuries affecting the shoulder girdle are rotator cuff strains, glenohumeral dislocations, acromioclavicular dislocations and clavicle fractures. These injuries are primarily the result of four mechanisms: direct impact, axial load on an extended arm, resisted forced abduction of the arm, and external rotation forces resulting from a firmly planted ski pole in the grasp of a skier during a fall. In this article, we describe the three most common shoulder girdle injuries in winter sports along with their management and answer the most important questions for the athlete.

Characterization of Shoulder Instability in Rhode Island: Incidence, Surgical Stabilization, and Recurrence.

PURPOSE: To characterize shoulder instability within the state of Rhode Island from 2011 to 2019. METHODS: The Rhode Island All-Payer Claims Database (APCD) was used to identify all patients that make an insurance claim related to a shoulder instability event. All patients in the APCD with an ICD-9 code of 718.31, 718.32, or 831.00 through 831.19 or an ICD-10 code of S43.001 through S43.086 or M24.41 through M25.319 between January 1, 2011 and December 31, 2019 were selected. Chi-square analysis was used to compare age- and sex-delimited subgroups; multivariate logistic regression was used to assess for factors influencing rates of surgical intervention and recurrent instability; and Kaplan-Meier failure and log-rank analyses was used to analyze variation in the time to surgery and recurrence between age-delimited subgroups. RESULTS: The incidence of overall shoulder instability (subluxations and dislocations) in Rhode Island was 62.20 instability events (95% CI, 60.61-63.78) per 100,000 person-years. The incidence of dislocations and subluxations were 49.46 injuries (95% CI, 48.05-50.88) and 12.73 injuries (95% CI, 12.02-13.45) per 100,000 person-years, respectively. Bivariate analysis demonstrated that male patients had significantly increased rates of surgical stabilization (6.36% vs. 2.80%) and recurrent instability (16.30% vs. 9.85%) compared to their female counterparts. However, after controlling for age at the primary instability event and the type and directionality of the instability, the difference in recurrence rates between males and females is no longer statistically significant (p = 0.326). Contrary to sex, age maintained its significance with those patients aged 20 and younger and 21-40 years at significantly increased odds of surgical stabilization (3.12 and 1.99, respectively) and experiencing a recurrent instability event (3.96 and 2.77, respectively). CONCLUSION: These data characterize the epidemiology of shoulder instability within the state of Rhode Island and demonstrate how increasing age at a primary instability event decreases the likelihood of both surgical stabilization and rates of recurrence.

Factors Associated With Shoulder Activity Level at Time of Surgery and at 2-Year Follow-up in Patients Undergoing Shoulder Stabilization Surgery.

BACKGROUND: Patients undergoing shoulder stabilization surgery have been shown to have elevated activity levels. Factors associated with shoulder activity in this patient population at baseline and after surgery are unknown. HYPOTHESIS: Patient-specific variables are associated with shoulder activity level at baseline and at 2-year follow-up in a cohort of patients undergoing shoulder stabilization surgery. STUDY DESIGN: Cohort study; Level of evidence, 2. METHODS: Patients undergoing shoulder stabilization surgery were prospectively enrolled. As part of the data collection process, patients completed a previously validated Shoulder Activity Scale. A regression analysis was performed to assess the association of patient characteristics with baseline and 2-year follow-up shoulder activity levels. RESULTS: A total of 764 (n = 612 men, n = 152 women) out of 957 patients (80%) undergoing shoulder stabilization surgery with a median age of 25 years had baseline and 2-year follow-up data and were included in the current analysis. The baseline shoulder activity level was associated with race ( P < .0001) and preoperative duration of instability (P < .0001). At 2 years, 52% of the cohort had returned to the same or higher activity level after surgery. Predictors of higher shoulder activity level at 2-year follow-up included higher baseline activity level (P < .0001), male sex (P < .0001), younger age (P = .004), higher body mass index (BMI) (P = .03), more dislocations (P = .03), nonsmokers (P = .04), and race (P = .04). CONCLUSION: A longer duration of preoperative symptoms was associated with a lower baseline activity in this cohort. High baseline preoperative shoulder activity, younger age, male sex, higher BMI, number of dislocations, and nonsmoking status predicted higher shoulder activity 2 years after shoulder stabilization surgery. REGISTRATION: NCT02075775 (ClinicalTrials.gov identifier).

Risk factors for the presence of important fractures in ED patients with shoulder dislocation: a retrospective cohort study.

BACKGROUND: Prereduction shoulder X-rays are frequently done to rule out an important fracture that might preclude reduction of a shoulder dislocation in the ED. Our objective was to determine the risk factors for an important fracture in patients admitted to the ED with shoulder dislocation. METHODS: This retrospective cohort study was conducted at the Toulouse University Hospital from 1 January 2017 to 31 December 2018. All patients admitted to the ED with clinical presentation of shoulder dislocation were included. The primary end point was the presence of an important fracture (excluding Bankart and Hill-Sachs fractures). Logistic regression was used to determine independent risk factors for the presence of an important fracture. RESULTS: Six hundred and two patients were included in the study and 81 (13%) had an important fracture. Three risk factors were associated with important fracture: age over 40 years (adjusted OR (aOR)=2.7; 95% CI 1.5 to 4.8), first incident (aOR=4.3; 95% CI 1.7 to 10.8) and the circumstances in which the trauma occurred (fall from a height or direct impact, fall of over 1 m, road accident or epilepsy) (aOR=5.5; 95% CI 2.6 to 30). One hundred sixty-six patients (28%) had no risk factors in our cohort. In the absence of these risk factors, the risk of an important fracture was found to be 0.6% (95% CI 0 to 3.3). CONCLUSION: We describe 3 independent clinical risk factors associated with an important fracture in ED patients with shoulder dislocation: age >40 years, first incident and a traumatic circumstance. Prereduction radiography may be safely avoided when these factors are absent.

Glenohumeral joint dislocation is rare in children with proximal humeral fractures: a descriptive study and literature review.

BACKGROUND: Glenohumeral dislocation combined with fracture of the proximal humerus is extremely rare in children, and this study aims to investigate its incidence in the pediatric population and review the treatment strategy for this condition. METHODS: Between Jan 2014 and Jan 2019, 280 patients with unilateral proximal humeral fractures were retrospectively reviewed. Imaging and follow-up notes were reviewed for patients with a predilection for glenohumeral joint dislocation. Six (2.14%) patients between the ages of 5 and 10 years were confirmed as glenohumeral joint dislocation and included in the study. All these patients underwent closed reduction and external fixation under general anesthesia. RESULTS: Out of 280 patients with proximal humeral fractures, only 6 patients, including 4 males and 2 females, were confirmed as glenohumeral joint dislocation. ROM was normal compared with the contralateral shoulder in every patient at the last follow-up. There was no case of radiological abnormality, including avascular necrosis or devascularization of the humeral head. CONCLUSIONS: Glenohumeral dislocation is a rare entity associated with the proximal humerus fracture in children, with an overall incidence in our case series was 2.14%. Reduction and stabilization of such injury using an external fixator is a suitable choice for pediatric patients that failed closed reduction.

Recurrence in traumatic anterior shoulder dislocations increases the prevalence of Hill-Sachs and Bankart lesions: a systematic review and meta-analysis.

PURPOSE: The extent of shoulder instability and the indication for surgery may be determined by the prevalence or size of associated lesions. However, a varying prevalence is reported and the actual values are therefore unclear. In addition, it is unclear whether these lesions are present after the first dislocation and whether or not these lesions increase in size after recurrence. The aim of this systematic review was (1) to determine the prevalence of lesions associated with traumatic anterior shoulder dislocations, (2) to determine if the prevalence is higher following recurrent dislocations compared to first-time dislocations and (3) to determine if the prevalence is higher following complete dislocations compared to subluxations. METHODS: PubMed, EMBASE, Cochrane and Web of Science were searched. Studies examining shoulders after traumatic anterior dislocations during arthroscopy or with MRI/MRA or CT published after 1999 were included. A total of 22 studies (1920 shoulders) were included. RESULTS: The proportion of Hill-Sachs and Bankart lesions was higher in recurrent dislocations (85%; 66%) compared to first-time dislocations (71%; 59%) and this was statistically significant (P < 0.01; P = 0.05). No significant difference between recurrent and first-time dislocations was observed for SLAP lesions, rotator-cuff tears, bony Bankart lesions, HAGL lesions and ALPSA lesions. The proportion of Hill-Sachs lesions was significantly higher in complete dislocations (82%) compared to subluxations (54%; P < 0.01). CONCLUSION: Higher proportions of Hill-Sachs and Bankart were observed in recurrent dislocations compared to first-time dislocations. No difference was observed for bony Bankart, HAGL, SLAP, rotator-cuff tear and ALPSA. Especially when a Hill-Sachs or Bankart is present after first-time dislocation, early surgical stabilization may need to be considered as other lesions may not be expected after recurrence and to limit lesion growth. However, results should be interpreted with caution due to substantial heterogeneity and large variance. LEVEL OF EVIDENCE: IV.

Shoulder impingement: various risk factors for supraspinatus tendon tear: A case group study.

ABSTRACT: A total of 680 cases of monolateral shoulder pain and functional impairment were included, and Chi-Squared tests was incorporated to test for possible associations.No relation between impingement syndrome and potential risk factors was found, such as presence of down slopping (P = .083), presence of ossification acromiale (P  = .102), presence of calcific tendinitis (P  = .144), types of acromion (I [P = .600], II [P = .536], III [P = .633] and IV [P = .832]) and grade of acromioclavicular degenerative changes (mild [P = .077], moderate [P = .111], and severe [P = .700]). However, a significant relationship was uncovered between impingement syndrome and risk factors such as gender (X2 = 7.004, df = 1, P = .08) (where females were more prone), history of shoulder dislocation (X2 = 19.440, df = 1, P = .001), presence of supraspinatus tendon tear or tendinopathy (X2 = 69.344, df = 1, P = .001) and supraspinatus complete tear (X2 = 13.593, df = 1, P = .001). A significant relationship was found between the type of supraspinatus pathology and factors such as gender (female more prone) (X2 = 34.719, df = 3, P = .01), presence of down slopping (X2 = 57.765, df = 3, P = .01), history of shoulder dislocation (X2 = 148.880, df = 3, P = .001), type III of the acromion (X2 = 12.979, df = 3, P = .005), presence of acromioclavicular generative changes mild (X2 = 76.408, df = 3, P = .001) and moderate (X2 = 29.697, df = 3, P = .001), and acromiohumeral distance of ≤3 mm (X2 = 18.915, df = 3, P = .001), 3.1 to 6 mm (X2 = 13.212, df = 3, P = .004), and 9.1-12 mm (X2 = 15.066, df = 3, P = .002). Overall, the Magnetic Resonance Imaging results yielded high sensitivity for detecting full-thickness supraspinatus tears.Considering the findings, this study may help radiologists understand the salient risk factors and identify which factors are mainly responsible for supraspinatus tendon tears and the respective grade of tear (articular partial, bursal partial, complete, or tendinopathy).

Outcomes of the arthroscopic Bankart procedure in Irish collision sport athletes.

BACKGROUND: While there is an abundance of research examining the outcomes of the arthroscopic Bankart repair in collision athletes, very few studies have involved the unique Irish collision sport athlete population. The previously held belief that collision athletes need to be treated with open surgery, due to the high traumatic forces the shoulder is subjected to in these sports, may no longer be true in the context of modern arthroscopic techniques and implants. AIMS: To report the outcomes of the arthroscopic Bankart procedure in the unique Irish collision athlete population. METHOD: Retrospective review conducted in 2018. Data was obtained from collision sport athletes using customised questionnaires and validated, standardised outcome measure tools. Participants were selected using inclusion and exclusion criteria. RESULTS: Fifty-four patients were included in the study. The average age at primary injury was 19.9 years (range 13-35 years). The rate of recurrent dislocation was 21% (12/57) with a mean follow up time of 24 months (range 7 to 48 months). The mean patient reported outcome measure (PROM) scores were as follows: ASES = 90.8, WOSI = 316.4, SSV = 79%. Six patients failed to return to their sport. Eighty-seven percent of the cohort returned to their sport, with a mean time to return of 7.25 months. Patients who experienced recurrent instability after arthroscopic Bankart had a younger age at primary dislocation (P = 0.0005) and lower ASES (P = 0.0056) and WOSI scores (0.00132) at latest follow-up, compared to those who remained stable postsurgery. CONCLUSION: The arthroscopic Bankart procedure has a high rate of recurrence of dislocation in Irish collision sport athletes. The current international literature suggests that the arthroscopic Bankart has similar rates of recurrence to the open procedure in collision athletes; however, this may not hold true for Irish collision sport athletes. Further research is required to determine the optimum surgical procedure for anterior shoulder instability in this population, particularly those patients with subcritical bone loss.

Closed Reduction of Anterior Shoulder Dislocations Performed by Ski Patrollers in the Alpine Prehospital Environment: A Retrospective Review Demonstrating Efficacy in a Canadian Ski Resort.

INTRODUCTION: Shoulder dislocations are common ski hill injuries. Rapid reduction is known to improve outcomes; however, advanced providers are not always available to provide care to these patients. In 2017, nonmedical ski patrollers at Sunshine Village ski resort in Alberta, Canada, were trained to perform anterior shoulder dislocation (ASD) reductions. Program success was determined by a chart review after the 2020 ski season. METHODS: This study retrospectively reviewed data on patients who presented to Sunshine Village ski patrol with a suspected ASD and who met the study inclusion criteria from November 2017 through March 2020. Data were collected from ski patrol electronic patient care records regarding general demographics, reduction technique used, analgesia administration, and reduction success rates. RESULTS: Ninety-six cases were available for review after exclusions. Trained nonmedical ski patrollers successfully reduced 82 of these cases, resulting in an overall reduction success rate of 89%. Sixty-three (66%) of these patients had experienced first-time dislocations. Eighty-two (87%) patients were male, with a median age of 25 y. The most used technique was the Cunningham method (75%), and analgesia was administered to 70% of patients. CONCLUSIONS: This retrospective study documents the results of a quality assurance review of the treatment of ASD at Sunshine Village ski resort. With a success rate of 89%, the evidence supports the conclusion that nonmedical ski patrollers can successfully perform ASD reductions. We believe training ski patrollers to reduce ASD improved patient care in our austere environment by providing early definitive treatment with a high success rate.

Incidence of Re-Dislocation/Instability After Arthroscopic Bankart Repair: Analysis via Telephone Interviews.

INTRODUCTION: Current advances in arthroscopic surgery have led to good outcomes for arthroscopic Bankart repair (ABR) for recurrent anterior shoulder dislocation. However, recent studies have reported recurrence rates of 4%-19% after ABR. In our survey conducted from February 2002 to December 2010, the post-ABR re-dislocation rate was 8.8%. In 2011, we began performing the ABR with open Bristow (B) procedure or Remplissage (R) procedure in patients with large glenoid or humeral head bone defects and in patients who play collision sports. Therefore, the present study is the second series evaluating the incidence of re-dislocation and instability after recurrent anterior shoulder dislocation. METHOD: Surgery was performed for 84 cases of shoulder instability from January 2011 to August 2017. After excluding 7 open surgeries, 6 reoperations, and 2 patients with multidirectional instability, telephone interviews were conducted with 69 patients. The average follow-up duration was 46.9 months (range, 13-92 months). RESULT: ABR alone was performed 61 patients; the B procedure was added for 3 patients, and the R procedure was added for 5 patients. Telephone interviews were conducted with 61 patients. There were no cases of re-dislocation or reoperation. Four patients who underwent only ABR experienced postoperative instability, but not to the extent that their daily lives were affected. CONCLUSION: This study showed that the addition of R or B technique to ABR for recurrent anterior shoulder dislocation resulted in a 0% re-dislocation rate.