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BackgroundFollowing blunt trauma, diagnosis of shoulder dislocation based on physical examination alone is difficult due to possible concurrent proximal humeral fractures. X-rays are therefore used to confirm diagnosis. Results from recent observational studies comparing diagnostic accuracy of point-of-care ultrasound (PoCUS) with X-rays for shoulder dislocation have been encouraging. The aim of this study was to determine whether PoCUS improves diagnostic accuracy when used with physical examination for the diagnosis of shoulder dislocation, proximal humeral fracture and ascertaining successful reduction in the ED.MethodsA prospective, single-centre, open, parallel randomised control study over a 6-month period was used to answer the research question and test the null hypothesis. Consecutive eligible adult patients attending the ED of Mater Dei Hospital in Malta were randomised to either the control (C) (physical examination only) or experimental group (E) (physical examination and a two-point PoCUS scan). The study objectives were to measure diagnostic accuracy for both examinations for detecting shoulder dislocation, any associated proximal humeral fractures and confirming reduction. X-rays were used as reference standard for both groups.Results1206 patients were enrolled in this study (C n=600, E n=606). 290 dislocations (C n=132 and E n=158), 332 proximal humeral fractures (C n=154 and E n=178) and 278 reductions (C n=130 and E n=148) were analysed. A statistically significant difference (p<0.001) was found between the two groups for diagnostic accuracy in shoulder dislocation (C=65%, likelihood ratio (LR)+=2.03 and LR−=0.35 and E=100%, LR+=∞ and LR−=0), proximal humeral fractures (C=45.7%, LR+=1.23 and LR−=0.52 and E=98.3%, LR+=103.9 and LR−=0.03) and reduction (C=68.7%, E=100%). The null hypothesis for this study was thus rejected.ConclusionsThe addition of PoCUS to a physical examination significantly improves diagnostic accuracy for dislocations, proximal humeral fractures and reduction confirmation.Trial registration numberInternational Standard Randomised Controlled Trials Number Registry (ISRCTN17048126).

Background Proximal humeral fractures are common injuries in the elderly population, with their incidence expected to rise due to increased life expectancy. A small subset of these fractures may be associated with dislocating forces that can result in shoulder dislocation concurrent with the fracture. For the elderly patients, proximal humeral fracture dislocation can be treated by open reduction and internal locking plate (LP) fixation or reverse shoulder arthroplasty (RSA). By now, no high-quality trials have compared the two. Methods This study is a prospective, single-center, superiority randomized controlled trial (RCT) comparing RSA and LP fixation in elderly patients (aged 65 to 85 years) with a proximal humeral fracture dislocation. Eligible participants will be randomly assigned to either the RSA or LP group (1:1 ratio). Postoperative follow-up will be conducted at 1 day (in the ward), 1 month, 3 months, 6 months, 12 months, and 24 months after surgery. Primary outcome is the Constant-Murley Score at 1-year postoperatively. Secondary outcomes include short version of Disabilities of the Arm Shoulder and Hand questionnaire score, American Shoulder and Elbow Surgeons score, Visual Analog Scale score, EuroQol-5 Dimension score, range of motion, strength and postoperative complications. Discussion This trial is the first RCT comparing RSA with LP fixation for proximal humeral fracture dislocations in elderly patients. The results of this study will provide high-quality evidence to guide clinical practice. Trial registration China Clinical Trials Registry No. ChiCTR2400088249.

Few studies were performed to compare ultrasound guided brachial plexus block with procedural sedation for reduction of shoulder dislocations in the Emergency Department (ED). This study was done to provide further evidence regarding this comparison. This was a randomized clinical trial performed on patients presenting with anterior shoulder dislocations to the emergency department of an academic level 2 trauma center. Exclusion criteria were any contraindications to the drugs used, any patient which may not be potentially assigned into both groups because of an underlying medical condition, presence of neurovascular compromise related to the dislocation, presence of concomitant fractures, and patient refusal to participate in the study. Patients were randomly assigned into the Procedural Sedation and Analgesia (PSA) group with propofol and fentanyl or ultrasound guided Inter-Scalene Brachial Plexus Block (ISBPB) with lidocaine and epinephrine. A total of 60 patients (30 in each group) were included in the study. The emergency room length of stay was significantly lower in the ISBPB group, with mean (SD) values of 108.6 (42.1) vs. 80.2 (25.2) minutes (p=0.005). However, pain scores in the PSA group during reduction showed advantage over ISBPB [0.38 vs. 3.43 (p<0.001)]. Moreover, patient satisfaction was higher with PSA (p<0.001). Using ISBPB for reduction of anterior shoulder dislocations takes less time to discharge and may make it more feasible in conditions mandating faster discharge of the patient. However, since pain scores may be lower using PSA, this method may be preferred by many physicians in some other situations.

Background. Glenohumeral subluxation (GHS) is common in patients with acute hemiplegia caused by stroke. GHS and upper limb function are closely related. Objective. Using musculoskeletal ultrasonography (MSUS) to objectively evaluate the efficacy of functional magnetic stimulation (FMS) in the treatment of GHS in acute hemiplegic patients after stroke. Methods. The study used prospective case control study. Stroke patients with GHS were recruited and assigned to control group and FMS group. Control group received electrode stimulation at the supraspinatus and deltoid muscles of the hemiplegic side, while FMS group was stimulated at the same locations. Before and after treatment, the distances of the acromion-greater tuberosity (AGT), acromion-lesser tuberosity (ALT), acromiohumeral distance (AHD), supraspinatus thickness (SST), and deltoid muscle thickness (DMT) in patients’ bilateral shoulder joint were measured by MSUS, respectively. Meanwhile, Fugl-Meyer Assessment (FMA) was used to evaluate the improvement of upper limb function. Results. 30 patients were recruited. After FMS treatment, there was a significant decrease in the difference value between ipsilateral side and contralateral side of AGT [ t = 8.595 , P < 0.01 ], ALT [ t = 11.435 , P < 0.01 ], AHD [ t = 8.375 , P < 0.01 ], SST [ t = 15.394 , P < 0.01 ], and DMT [ t = 24.935 , P < 0.01 ], and FMA score increased [ t = - 13.315 , P < 0.01 ]. Compared with control group, FMS group decreased more significantly in the difference value between ipsilateral side and contralateral side of AGT [ t = 2.161 , P < 0.05 ], ALT [ t = 3.332 , P < 0.01 ], AHD [ t = 8.768 , P < 0.01 ], SST [ t = 6.244 , P < 0.01 ], and the DMT [ t = 3.238 , P < 0.01 ], and FMA score increased more significantly in FMS group [ t = 7.194 , P < 0.01 ]. Conclusion. The study preliminarily shows that the MSUS can objectively and dynamically evaluate the treatment effect of GHS in hemiplegic patients. Meanwhile, compared with control group, the FMS is more effective and has fewer side effects, and the long-term effect of FMS is worth further study. This trial is registered with ChiCTR1800015352.

Purpose To develop a consensus on diagnosis and treatment of acromioclavicular joint instability. Methods A consensus process following the modified Delphi technique was conducted. Panel members were selected among the European Shoulder Associates of ESSKA. Five rounds were performed between October 2018 and November 2019. The first round consisted of gathering questions which were then divided into blocks referring to imaging, classifications, surgical approach for acute and chronic cases, conservative treatment. Subsequent rounds consisted of condensation by means of an online questionnaire. Consensus was achieved when ≥ 66.7% of the participants agreed on one answer. Descriptive statistic was used to summarize the data. Results A consensus was reached on the following topics. Imaging: a true anteroposterior or a bilateral Zanca view are sufficient for diagnosis. 93% of the panel agreed on clinical override testing during body cross test to identify horizontal instability. The Rockwood classification, as modified by the ISAKOS statement, was deemed valid. The separation line between acute and chronic cases was set at 3 weeks. The panel agreed on arthroscopically assisted anatomic reconstruction using a suspensory device (86.2%), with no need of a biological augmentation (82.8%) in acute injuries, whereas biological reconstruction of coracoclavicular and acromioclavicular ligaments with tendon graft was suggested in chronic cases. Conservative approach and postoperative care were found similar Conclusion A consensus was found on the main topics of controversy in the management of acromioclavicular joint dislocation. Each step of the diagnostic treatment algorithm was fully investigated and clarified. Level of evidence Level V.

Background Arthroscopic Bankart repair alone cannot restore shoulder stability in patients with glenoid bone loss involving more than 20% of the glenoid surface. Coracoid transposition to prevent recurrent shoulder dislocation according to Bristow-Latarjet is an efficient but controversial procedure. Questions/purposes We determined whether an arthroscopic Bristow-Latarjet procedure with concomitant Bankart repair (1) restored shoulder stability in this selected subgroup of patients, (2) without decreasing mobility, and (3) allowed patients to return to sports at preinjury level. We also evaluated (4) bone block positioning, healing, and arthritis and (5) risk factors for nonunion and coracoid screw pullout. Methods Between July 2007 and August 2010, 79 patients with recurrent anterior instability and bone loss of more than 20% of the glenoid underwent arthroscopic Bristow-Latarjet-Bankart repair; nine patients (11%) were either lost before 2-year followup or had incomplete data, leaving 70 patients available at a mean of 35 months. Postoperative radiographs and CT scans were evaluated for bone block positioning, healing, and arthritis. Any postoperative dislocation or any subjective complaint of occasional to frequent subluxation was considered a failure. Physical examination included ROM in both shoulders to enable comparison and instability signs (apprehension and relocation tests). Rowe and Walch-Duplay scores were obtained at each review. Patients were asked whether they were able to return to sports at the same level and practice forced overhead sports. Potential risk factors for nonhealing were assessed. Results At latest followup, 69 of 70 (98%) patients had a stable shoulder, external rotation with arm at the side was 9° less than the nonoperated side, and 58 (83%) returned to sports at preinjury level. On latest radiographs, 64 (91%) had no osteoarthritis, and bone block positioning was accurate, with 63 (90%) being below the equator and 65 (93%) flush to the glenoid surface. The coracoid graft healed in 51 (73%), it failed to unite in 14 (20%), and graft osteolysis was seen in five (7%). Bone block nonunion/migration did not compromise shoulder stability but was associated with persistent apprehension and less return to sports. Use of screws that were too short or overangulated, smoking, and age higher than 35 years were risk factors for nonunion. Conclusions The arthroscopic Bristow-Latarjet procedure combined with Bankart repair for anterior instability with severe glenoid bone loss restored shoulder stability, maintained ROM, allowed return to sports at preinjury level, and had a low likelihood of arthritis. Adequate healing of the transferred coracoid process to the glenoid neck is an important factor for avoiding persistent anterior apprehension. Level of Evidence Level IV, therapeutic study. See Instructions for Authors for a complete description of levels of evidence.

Purpose To investigate the clinical and radiologic mid- to long-term results of arthroscopic iliac crest bone-grafting for anatomic glenoid reconstruction in patients with recurrent anterior shoulder instability. Methods Seventeen patients were evaluated after a minimum follow-up of 5 years. Clinical [range of motion, subscapularis tests, apprehension sign, Subjective Shoulder Value (SSV), Constant Score (CS), Rowe Score (RS), Walch Duplay Score (WD), Western Ontario Shoulder Instability Index (WOSI)], and radiologic [X-ray (true a.p., Bernageau and axillary views) and computed tomography (CT)] outcome parameters were assessed. Results Fourteen patients [mean age 31.1 (range 18–50) years] were available after a follow-up period of 78.7 (range 60–110) months. The SSV averaged 87 (range 65–100) %, CS 94 (range 83–100) points, RS 89 (range 30–100) points, WD 87 (range 25–100) points, and WOSI 70 (range 47–87) %. The apprehension sign was positive in two patients (14%). One patient required an arthroscopic capsular plication due to a persisting feeling of instability, while the second patient experienced recurrent dislocations after a trauma, but refused revision surgery. CT imaging showed a significant increase of the glenoid index from preoperative 0.8 ± 0.04 (range 0.7–0.8) to 1.0 ± 0.11 (range 0.8–1.2) at the final follow-up ( p  < 0.01). Conclusion Arthroscopic reconstruction of anteroinferior glenoid defects using an autologous iliac crest bone-grafting technique yields satisfying clinical and radiologic results after a mid- to long-term follow-up period. Postoperative re-dislocation was experienced in one (7.1%) of the patients due to a trauma and an anatomic reconstruction of the pear-shaped glenoid configuration was observed. Level of evidence IV.

Background Instability after shoulder arthroplasty remains a complication with limited salvage options. Reoperation for instability with anatomic designs has led to high rates of persistent instability, therefore we aimed to evaluate the use of RSA for treatment of prosthetic instability. Questions/purposes (1) After revision shoulder arthroplasty to a reverse prosthesis (RSA), what is the survivorship free from dislocations at 2 and 5 years? (2) What factors are associated with dislocations? (3) What is the survivorship free from revision after revision to RSA? (4) From preoperation to postrevision to RSA, what are the clinical outcomes—the proportion of patients with moderate to severe pain, shoulder elevation and external rotation ROM, American Shoulder and Elbow Surgeons scores, and Simple Shoulder Test scores? Methods All shoulder arthroplasties revised for prosthetic instability using RSA components between January 2004 and July 2014 were retrospectively studied. During the period in question, we performed 82 revisions for instability of an anatomic total shoulder arthroplasty (TSA) (n = 62), hemiarthroplasty (n = 13), or reverse TSA (n = 7). We typically used a reverse TSA to treat this problem, but we identified 12 treated in other ways, including revision of a TSA to hemiarthroplasty (n = 3), revision of a reverse TSA to hemiarthroplasty (n = 2), revision of hemiarthroplasty to a hemiarthroplasty (n = 1), and revision of an anatomic TSA to another anatomic TSA (n = 6). This left 70 patients for evaluation; of those, 65 (93%) were available for analysis at a mean of 3 years (range, 2–10 years). A total of seven patients died. Eight of the 65 shoulders were not evaluated during the last 5 years, including three in patients who died earlier. The mean age of the patients at the time of revision RSA was 65 years (range, 40–89 years). Data were obtained from a longitudinally maintained institutional joint registry. Instability was defined as severe subluxation confirmed on clinical and radiographic examinations. We evaluated pain and ROM, and Kaplan-Meier curves were used to estimate survivorship. Results The survivorship free from dislocation at 2 and 5 years was 87% (95% CI, 80%–94%) and 79% (95% CI, 67%–91%) respectively, with 10 of 65 (15%) patients having an episode of dislocation after revision surgery. Persistent instability was more common in those with a BMI greater than 35 kg/m 2 (hazard ratio [HR], 5; 95% CI, 2–16; p = 0.008) and prior hemiarthroplasty (HR, 5; 95% CI, 2–16; p = 0.005), whereas patients who had undergone a previous TSA were less likely to have persistent instability (HR, 0.08; 95% CI, 0.0–0.30; p < 0.001) The survival free from rerevision for any indication at 2 and 5 years was 85% (95% CI, 76%–94%) and 78% (95% CI, 66%–90%) respectively; with the numbers available, we were not able to find associated factors. Fewer patients had moderate or severe pain after revision to RSA (preoperative: 48 of 65 [74%]; postoperative: nine of 65 [14%]; p < 0.001). After surgery, patients showed improvement in shoulder elevation (preoperative: 42° [± 30°], postoperative: 112° [42°]; mean difference, 70° [95% CI, − 83 o to 57°]; p < 0.001) and external rotation (preoperative: 20° [± 22°], postoperative: 42° [± 23°]; mean difference, 22° [95% CI, − 30° to − 14°]; p < 0.001). American Shoulder and Elbow Surgeons scores improved (preoperative: 21 [± 10], postoperative: 68 [± 14], mean difference, 46 [95% CI, − 58 to − 35]; p < 0.001); where a higher score is better. Simple Shoulder Test scores also improved (preoperative: 2/12 [± 2], postoperative: 7/12 [± 3]; mean difference, 5 [95% CI, − 7 to − 2.17]; p < 0.001); where a higher score is better. Conclusions Revision RSA for prosthetic instability after shoulder arthroplasty is associated with reasonable implant survival and few complications. Approximately one in seven patients will have a recurrent dislocation. In patients with persistent instability or with risk factors for instability, consideration should be given for use of larger glenospheres and increasing the lateral offset at the time of RSA. Level of Evidence Level IV, therapeutic study.

Background The diagnosis of posterior shoulder dislocation (PSD) is often overlooked as these injuries are not common, since clinical signs may be subtle and easily overlooked unless specifically evaluated. This study aimed to determine the factors related to clinical outcomes in patients with chronic locked PSD treated with the modified McLaughlin procedure. Methods The study included 22 patients from 5 different clinics who were diagnosed with chronic (> 6 weeks) locked PSD and underwent the modified McLaughlin procedure. The pre- and postoperative values of shoulder forward flexion, abduction, and external rotation were recorded for each patient. At the final follow-up examination, the patient-reported clinical outcomes were evaluated through Constant-Murley Score (CMS), the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire, and the University of California-Los Angeles (UCLA) shoulder scale. Defect depth and defect angle were measured on axial computed tomography sections. Result Evaluation was made of 14 males and 8 females aged 25–58 years. The mean time interval between the dislocation and surgery was 18.4 ± 7.4 weeks. The postoperative scale scores were DASH mean 17.1 ± 5.6, CMS median 70.0 [35.0–83.0] and UCLA shoulder scale mean 25.5 ± 6.6. Strong to excellent correlations were determined between the functional scores and the duration of dislocation. Regardless of age, gender, depth and degree of the defect, and immobilization duration, the duration of dislocation (weeks) was associated with the DASH score (beta:0.513, 95% CI:0.931–7.528, p  = 0.015), CMS (beta: -0.916, 95% CI: -1.959 to -1.293, p  < 0.001), and the UCLA shoulder scale (beta: -0.899, 95% CI: 0.983 to -0.618, p  < 0.001). Conclusion In patients with locked PSD, the primary factor influencing clinical outcomes is the duration of the dislocation, rather than humeral head defect size or patient age. PSD should be suspected in patients with shoulder trauma who present with limitations in forward flexion and abduction.

Introduction Postoperative instability following reverse total shoulder arthroplasty (RTSA) is one of the most common complications and remains a significant clinical challenge. Although implant positioning, design, and surgical technique are known to influence stability, there is no universally accepted management strategy when dislocation recurs. This study reports two rare cases of early, atraumatic recurrent dislocation after RTSA, highlighting the complexity of this complication. Methods and results Between 2014 and 2023, 182 reverse total shoulder arthroplasties (RTSAs) were performed at our institution by a single surgeon using a consistent technique. We retrospectively identified two patients who developed recurrent dislocation. One patient underwent RTSA for an acute proximal humerus fracture, and the other for fracture malunion. Dislocation occurred at 2 and 3 weeks postoperatively, respectively, without any traumatic event. Both cases required operative reduction, as closed reduction in the emergency setting was unsuccessful. Despite upsizing to a thicker polyethylene liner, instability persisted. Ultimately, open reduction followed by immobilization in an abduction brace for six weeks was performed. During follow-up, no further dislocations occurred, and both patients retained their prosthesis with acceptable functional outcomes. Conclusion Early recurrent dislocation can occur despite correct implant orientation and satisfactory intraoperative stability testing. In such cases, open reduction followed by prolonged immobilization may offer a viable option to avoid revision or resection arthroplasty.