Reduction Attempts Research Articles

Low Success Rate of Closed Reductions when Treating Dislocations after Reverse Shoulder Arthroplasty: A Study by the ASES Complications of RSA Multicenter Research Group.

Postoperative dislocation is a known complication following reverse shoulder arthroplasty (RSA), but treatment patterns and outcomes remain unclear. The purpose of this study was to identify treatment patterns, rate of successful closed reductions, and factors associated with unsuccessful closed reductions for dislocations after RSA in a large multicenter patient cohort. A multicenter retrospective review was performed for patients receiving primary or revision RSA from June 2013 to May 2019 across fifteen institutions in the United States. Patients that sustained a postoperative shoulder dislocation (defined as complete loss of articulation between the humeral component and glenosphere confirmed on imaging) with a minimum of 3-month follow-up were included. The time from surgery to dislocation, nature of the dislocation, complications associated with the dislocation, initial treatment, success of closed reduction, recurrent dislocations, and subsequent treatments including revision procedures, were recorded. Univariate analysis was performed to identify patient factors associated with failure of an initial closed reduction attempt. A cumulative postoperative dislocation incidence of 2.1% (n=138) was observed out of 6,621 patients undergoing RSA. The median time to dislocation was 7 weeks (interquartile range = 33 weeks), with 61.6% (n=85) occurring within the first 90 days after surgery. Initial treatment consisted of closed reduction (n=87, 63.0%), open reduction (n=1, 0.7%), revision arthroplasty (n=43, 31.2%), or benign neglect (n=7, 5.1%). Those treated without an initial closed reduction had higher incidence of associated complications (45.1% vs. 14.9%). Among patients initially treated with a closed reduction, 27 (31.0%) were successful (required no further interventions), 15 (17.2%) subsequently required a revision procedure, and 43 (49.4%) sustained an additional dislocation. The only patient or surgical factor associated with an unsuccessful closed reduction was increased BMI (31.8±6 vs. 28.9±5.2, P=0.02). Of the 43 patients that sustained an additional dislocation, 10 received another closed reduction and 30 received revision surgery. Among the 10 patients that received a second closed reduction, 5 remained stable (50.0%). Overall, 92 patients (66.7%) required a revision arthroplasty procedure during the study period, whereas 22 (22.5%) required multiple revision procedures. Ultimately, 18 patients (13.0%) remained unstable (benign neglect) at final follow-up. In this large multicenter series of postoperative dislocations following RSA, a closed reduction was initially attempted in the majority of patients, but only about one-third were successful and required no further intervention. Unsuccessful closed reductions were associated with higher patient BMI. Revision surgery for dislocations was complicated by a high rate of recurrent dislocations and re-revision surgery.

The Impact of the Position of the Humeral Head Relative to the Glenoid on Iatrogenic Fractures During Shoulder Dislocation Reduction

Background and Objectives: The aim of this study was to investigate the relationship between the position of the humeral head relative to the glenoid and the occurrence of iatrogenic surgical neck fractures of the humerus during anterior glenohumeral dislocation reductions. Materials and Methods: Patients with first-time anterior shoulder dislocations without generalized joint hyperlaxity were included. The humeral head displacement ratio was calculated as the distance between the medial border of the humeral head and the anterior glenoid rim divided by the diameter of the humeral head. Demographic data, concomitant tuberculum majus fractures, and the deltoid tuberosity index were recorded. Patients were divided into three groups: Group 1 (iatrogenic fracture development during closed reduction (CR)), Group 2 (failed CR), and Group 3 (successful reduction without iatrogenic fracture). Complicated dislocations were included in Groups 1 and 2, while uncomplicated dislocations were those in Group 3. Results: The study included 89 patients with a mean age of 46.44 ± 19.02 years (64 males, 25 females). Concomitant tuberculum majus fractures occurred in 37 (41.6%) cases. Iatrogenic surgical neck fractures occurred in 10 patients (Group 1), and CR was unsuccessful in 8 patients (Group 2), totaling 18 cases of complicated dislocations. Reduction without iatrogenic fracture was achieved in 71 cases (Group 3). The mean humeral head displacement ratio was higher in the complex dislocation group (92.91 ± 15.34 vs. 75.01 ± 13.80; p < 0.001). Complicated dislocations were more frequent in patients with tuberculum majus fractures (p = 0.031). Subgroup analysis showed higher humeral head displacement ratios in Groups 1 and 2 compared to Group 3 (p = 0.010 and p = 0.06, respectively). Tuberculum majus fractures were more frequent in Group 1 compared to Group 3 (p = 0.013), with no significant difference between Groups 2 and 3. Conclusions: In patients experiencing first-time traumatic anterior shoulder dislocations, a greater medial displacement of the humeral head relative to the glenoid rim significantly increases the risk of iatrogenic humeral fractures and the likelihood of unsuccessful closed reduction attempts.

Iatrogenic Irreducible Pediatric Salter-Harris II Middle Phalanx Base Fracture With Dorsal Dislocation of the Proximal Interphalangeal Joint: A Case Report.

Pediatric phalangeal Salter-Harris (SH)-type fracture dislocations are rare injuries that often require open reduction and stabilization. We present a case of a 14-year-old male who sustained an iatrogenic irreducible SH II dorsal fracture dislocation of the small-finger proximal interphalangeal joint (PIPJ) after an attempted closed reduction of a small-finger PIPJ dislocation by a community emergency medicine physician. Following the reduction attempt, the epiphysis was noted on radiographs to be rotated approximately 90° with persistent dorsal dislocation and an associated SH II fracture of the base of the middle phalanx. The patient was sent to our trauma center for further evaluation by our on-call hand surgeon and required open reduction and pinning of the fracture dislocation. To our knowledge, this pattern of iatrogenic PIPJ fracture dislocation has not been previously described in the literature. We outline the case presentation, treatment method, and learning points for both the on-call hand surgeon as well as the community emergency medicine physicians in this report.

Association of Time Since Diagnosis of Pediatric Ileocolic Intussusception With Success of Attempted Reduction: Analysis in 1065 Patients.

BACKGROUND: Radiologists generally treat pediatric ileocolic intussusceptions emergently given potential worse outcomes from delayed reduction attempts. However, relevant literature is conflicting. OBJECTIVE: To identify factors associated with successful image-guided ileocolic intussusception reduction in children, with attention to the time interval since diagnosis. METHODS: This retrospective study included patients <6 years old who underwent attempted image-guided enema reduction of ileocolic intussusception between May 2009 and July 2023. Patients were separated into two groups: those presenting directly to the institution (nontransferred patients, who all underwent attempted reduction <8 hours after ultrasound diagnosis), and those transferred from outside facilities. EHR data were extracted. Each patient's first image-guided reduction attempt was classified as successful or unsuccessful. Univariable and multivariable analyses were performed. RESULTS: The study included 1065 patients (649 male, 416 female; mean age, 18.1 months; age range, 2.2-71.0 months; 793 nontransferred and 272 transferred patients). In nontransferred patients, the mean interval between ultrasound diagnosis and reduction attempt was 150.8 minutes; in transferred patients, the mean interval between outside facility advanced imaging and reduction attempt was 460.1 minutes (p<.001). Successful reduction occurred in 84.6% and 81.6% of nontransferred and transferred patients, respectively (p=.25). In nontransferred patients, success occurred in 85.6% of attempts <2 hours after diagnosis versus 84.0% of attempts 2-<8 hours after diagnosis (p=.54); the mean interval from diagnosis to attempted reduction was 149.7 minutes and 156.8 minutes for successful and unsuccessful attempts, respectively (p=.53). In multivariable analysis, factors showing independent associations with success were proximal intussusception location (OR=3.63, p<.001) and absence of high-risk ultrasound findings (OR=2.57, p<.001); success was not independently associated with age, sex, bloody stools, reduction method, or time since diagnosis <2 hours (p>.05). In transferred patients, the mean interval from outside advanced imaging to attempted reduction was 463.1 minutes and 440.2 minutes for successful and unsuccessful attempts, respectively (p=.74). CONCLUSION: Intussusception reduction may not require completion emergently (within 2 hours after diagnosis), but potentially may be safely performed on an urgent basis (within 8 hours). CLINICAL IMPACT: The findings have implications for determining the standard of care, including criteria for oncall activation of radiologic resources, in pediatric intussusception management.

Salt reduction attempts in workers after specific food service facility guidance provided by a public health center: A case study at a worksite in Kawagoe City, Saitama Prefecture

Objective The Kawagoe City Public Health Center implemented a project to reduce salt intake through specific food service facility guidance in workplace cafeterias. Here, we report the study results.Methods The target worksite was company A, with approximately 270 employees, located in Kawagoe City, Saitama Prefecture. There were 214 participants (approximately 80%). The project was conducted from November 2019 to November 2021. The long-term goal was to decrease the number of hypertensive cases in the city. Project outcomes included decreased salt intake, urinary sodium/potassium ratio, and average blood pressure. The project aimed to improve the cafeteria menu, focusing on salt reduction by offering Smart Meals® and reducing the salt equivalents in all menus. The project output indicators included reduced amount of salt in cafeteria menu items, increased frequency of cafeteria use, increased positive evaluations of the cafeteria, and increased daily awareness of the need for salt reduction. Spot urine samples, blood pressure measurements, and self-administered questionnaire data were collected during annual physical examinations. The amount of salt in the cafeteria menu was evaluated by receiving monthly data from the food service company to which company A outsourced its cafeteria operations.Results The analysis included 102 individuals with complete data from to 2019-2021. Estimated salt intake (g/day) from spot urine decreased from 10.3±2.1 in 2019 to 9.8±2.4 in 2020 and 9.5±2.0 in 2021 (P=0.003). Systolic blood pressure (mmHg) decreased from 114.7±12.5 in 2019 to 111.7±12.1 in 2020 and 110.6±12.0 in 2021 (P=0.010). Compared to 2019, changes in dietary salt equivalents in cafeteria menus in 2020 and 2021decreased for set meals A and B, curries, and noodles (P<0.001).Conclusion We offered Smart Meals® and reduced salt equivalents in all workplace cafeteria menus. After 1-2 years, employees' salt intake and blood pressure levels were lower. These results provide implications for the implementation of food environment improvements in public health centers and other local government agencies to promote the Health Japan 21 (third term) strategy.

Scoring System to Evaluate Risk of Nonoperative Management Failure in Children With Intussusception

IntroductionTypical first-line management of children with intussusception is enema reduction; however, failure necessitates surgical intervention. The number of attempts varies by clinician, and predictors of failed nonoperative management are not routinely considered in practice. The purpose of this study is to create a scoring system that predicts risk of nonoperative failure and need for surgical intervention. MethodsChildren diagnosed with intussusception upon presentation to the emergency department of a tertiary children's hospital between 2019 and 2022 were retrospectively identified. Univariable logistic regression identified predictors of nonoperative failure used as starting covariates for multivariable logistic regression with final model determined by backwards elimination. Regression coefficients for final predictors were used to create the scoring system and optimal cut-points were delineated. ResultsWe identified 143 instances of ultrasound-documented intussusception of which 28 (19.6%) required operative intervention. Predictors of failed nonoperative management included age ≥4 y (odds ratio [OR] 32.83, 95% confidence interval [CI]: 1.91-564.23), ≥1 failed enema reduction attempts (OR 189.53, 95% CI: 19.07-1884.11), presenting heart rate ≥128 (OR 3.38, 95% CI: 0.74-15.36), presenting systolic blood pressure ≥115 mmHg (OR 6.59, 95% CI: 0.93-46.66), and trapped fluid between intussuscepted loops on ultrasound (OR 17.54, 95% CI: 0.77-397.51). Employing these factors, a novel risk scoring system was developed (area under the curve 0.96, 95% CI: 0.93-0.99). Scores range from 0 to 8; ≤2 have low (1.1%), 3-4 moderate (50.0%), and ≥5 high (100%) failure risk. ConclusionsUsing known risk factors for enema failure, we produced a risk scoring system with outstanding discriminate ability for children with intussusception necessitating surgical intervention. Prospective validation is warranted prior to clinical integration.

Impact of a 6–12-h delay between ileocolic intussusception diagnostic US and fluoroscopic reduction on patients’ outcomes

BackgroundImage-guided reduction of intussusception is considered a radiologic urgency requiring 24-h radiologist and technologist availability.ObjectiveTo assess whether a delay of 6–12 h between US diagnosis and fluoroscopic reduction of ileocolic intussusception affects the success frequency of fluoroscopic reduction.Materials and methodsRetrospective review of 0–5-year-olds undergoing fluoroscopic reduction for ileocolic intussusception from 2013 to 2023. Exclusions were small bowel intussusception, self-reduced intussusception, first fluoroscopic reduction attempt>12 h after US, prior bowel surgery, inpatient status, and patient transferred for recurrent intussusception. Data collected included demographics, symptoms, air/contrast enema selection, radiation dose, reduction failure, 48-h recurrence, surgery, length of stay, and complications. Comparisons between<6-h and 6–12-h delays after ultrasound diagnosis were made using chi-square, Fisher’s exact test, and Mann–Whitney U tests (P< 0.05 considered significant).ResultsOf 438 included patients, 387 (88.4%) were reduced in <6 h (median age 1.4 years) and 51 (11.7%) were reduced between 6 and 12 h (median age 2.05 years), with median reduction times of 1:42 and 7:07 h, respectively. There were no significant differences between the groups for reduction success (<6 h 87.3% vs. 6–12 h 94.1%; P-value = 0.16), need for surgery (<6 h 11.1% vs. 6–12 h 3.9%; P-value=0.112), recurrence of intussusception within 48 h after reduction (<6 h 9.3% vs. 6–12 h 15.7%; P-value=0.154), or length of hospitalization (<6 h 21:07 h vs. 6–12 h 20:03 h; P-value=0.662).ConclusionA delay of 6–12 h between diagnosis and fluoroscopic reduction of ileocolic intussusception is not associated with reduced fluoroscopic reduction success, need for surgical intervention after attempted reduction, recurrence of intussusception following successful reduction, or hospitalization duration after reduction.Graphical

Patient factors associated with unplanned sedation after intra-articular lidocaine for shoulder dislocation

BackgroundRecent evidence suggests that intra-articular lidocaine (IAL) is an appropriate analgesic alternative to intravenous sedation (IV sedation) during shoulder dislocation reduction, however little is known about patient factors associated with IAL failure and need for subsequent IV sedation. Avoiding crossover is important, as repeated reduction attempts have been previously shown to increase the rate of procedural complications. ObjectivesTo identify patient level factors associated with crossover from IAL to IV sedation and associated complication rates and operational impacts. MethodsThis retrospective observational cohort study evaluated the patient characteristics associated with crossover to unplanned IV sedation after IAL among adult patients undergoing ED reduction of an isolated, acute anterior shoulder dislocation from 2013 to 2021 in an urban, academic hospital system. Univariate analysis and multivariate logistic regression were used. ResultsIn total, 630 participants were identified who received IAL or procedural sedation. Of these, 182 (28.9 ​%) received IAL of whom 49 (26.9 ​%) subsequently required unplanned IV sedation. Participants had 1.205 (95 ​% CI 1.030, 1.418) fold increase in odds of unplanned sedation for every 10-year increase in age. Crossover to IV sedation was associated with greater rates of adverse events, ED length of stay, and quantity of opioids received compared to either IAL or IV sedation alone. ConclusionsParticipants with unplanned IV sedation after IAL had more adverse events than those who received either method alone. Older age was associated with unplanned sedation after IAL. Prospective studies are needed to further define patient factors likely to contribute to failure of IAL.

Complex Axial Carpal Dislocation with Scapholunate Ligament Injury

Abstract Background Axial carpal dislocations (ACDs) are high-impact injuries, involving both proximal and distal carpal rows, adding complexity to the diagnostic and treatment challenges. This article explores a distinctive case of axial radial carpal dislocation, highlighting an irreducible second carpometacarpal joint (CMCJ) and concomitant scapholunate (SL) ligament injury. Understanding the background of axial carpal injuries is crucial for recognizing and addressing these complex cases effectively. Description A 27-year-old man presented with a left wrist injury following a motorcycle accident, revealing an irreducible second CMCJ with a unique ligamentous injury pattern. Despite unsuccessful closed reduction attempts, the surgical intervention involved a dorsal midline incision, fixation of the second CMCJ and SL interval, and ligament repair. Postoperative assessment demonstrated proper alignment with a mild gap in the SL interval, revealing the intricate nature of the injury. Literature Review Existing studies describe a type of axial dislocation starting at the third webspace, traveling through capitate–hamate intervals leading to scaphoid dislocation. However, in the article, we describe a variant of ACD through second CMCJ causing an SL interval instability. Clinical Relevance Recognizing and comprehensively addressing axial radial carpal dislocations are crucial for optimal patient outcomes. The case report contributes valuable insights into the rare pattern of ACD involving SL instability that was missed on initial radiographs but detected through computed tomography scan and thereby managed appropriately. Any CMCJ dislocation should raise a suspicion of axial dislocation unless proved otherwise.

Open Exploration and Reduction of Paediatric Supracondylar Humerus Fracture with Pink, Pulseless Hand in Resource-Limited Settings.

Background: Supracondylar humerus fractures (SHFs) are common paediatric injuries, with high risk of vascular compromise. Some patients present with a 'pink, pulseless hand', caused by occlusion of brachial artery flow but with collateral circulation preserving distal perfusion. Management of these patients remains controversial, especially when resources may be limited for prolonged hospitalisation and serial monitoring by skilled staff. The aim of this study is to present the intraoperative findings, surgical procedures done and outcomes at 6 weeks for patients with paediatric supracondylar fractures with a pink pulseless hand. Methods: We retrospectively identified 13 patients who presented to a public hospital between January 2019 and May 2023 with a displaced SHF and pink, pulseless hand. All patients underwent an open reduction with an anterior approach allowing for exploration, protection and repair of neurovascular structures. Distal flow was restored in the brachial artery either with topical lidocaine application, thrombectomy or artery reconstruction. Results: Out of 13 patients, all had intact median nerves and 10 had intact arteries (69%), of which seven were interposed at the fracture site and four were in vasospasm. Of the three patients with true arterial injury (23%), two had a crushed artery and one had thrombosis of the artery. Peripheral pulses were restored within an hour of fracture open reduction in all patients. At final follow-up, a mean 6 weeks postoperatively, all patients had recovered without neurovascular deficit, compartment syndrome or Volkmann ischemic contracture. Conclusions: In resource-limited settings, we recommend performing open exploration and reduction for patients with SHFs with pink, pulseless hand. This approach prevents iatrogenic neurovascular injury during closed reduction attempts, allows for immediate repair of a brachial artery injury and avoids unnecessary hospitalisation and serial monitoring. Level of Evidence: Level IV (Therapeutic).

Fueling the future: Overcoming the barriers to market development of renewable fuels in Germany using a novel analytical approach

Germany has set ambitious targets for reducing greenhouse gas (GHG) emissions, namely by 65% until 2030 (compared to the 1990 level) and achieving climate neutrality by 2045. Although GHG emissions have decreased in most sectors, the transport sector has experienced failed reduction attempts. Renewable fuels are promising sustainable fuel alternatives that can replace current market-dominant fossil fuels to reduce GHG emissions. However, the market development of renewable fuels is hindered by various economic, environmental, technical, regulatory, and social barriers. Using a novel holistic approach, this study aims to analyze the market development barriers for renewable fuels in the German transport sector. First, a novel extension to the decision making trial and evaluation laboratory (DEMATEL) method is proposed using the Type-2 Neutrosophic Numbers (T2NN), which is improved by the K-means algorithm. Second, the maximum mean de-entropy algorithm is applied to convert the results of T2NN-DEMATEL into input for interpretive structural modeling (ISM). Next, a case study is conducted to analyze the impacts of barriers on different transport modes using the T2NN-based additive ratio assessment. Extensive sensitivity analyses are conducted to measure the impacts of different factors under different circumstances. The obtained results indicate that insufficient renewable energy policies and regulations, the lack of coordination in the supply chain, and high technology conversion challenges are the most significant barriers. Moreover, road and maritime transport are affected more than the aviation and rail sectors by the market development barriers.

Weather and Crop Yield Prediction by Machine Learning Model and Spiking Neural Network

This paper, "Weather and Crop Yield Prediction by Machine Learning Model and Spiking Neural Network," is to improve crop yield prediction efficiency by utilizing cutting-edge technology and transform agricultural practices. The creation of two prediction models specifically for this purpose is the main goal of the study. The first model incorporates geographical information such as Normalized difference vegetation index (NDVI), Standard Precipitation Index (SPI), and Vector Choquet Integral (VCI) and uses a Genetic Algorithm to reduce the size of the input dataset. This reduction attempts to lessen learning process confusion brought on by comparable data with different values. The model improves its capacity to identify pertinent patterns for precise yield estimates by incorporating spatial data. The SoftMax function is employed by the second model, a Modified Convolutional Neural Network (MCNN), as an error correcting method. By reducing errors and raising the overall accuracy of the model, the SoftMax function improves the output and produces forecasts that are more accurate. The study emphasizes how crucial geographic data including satellite imagery is for supplying crucial insights for predicting crop yields. Farmers can make well-informed decisions by having a thorough understanding of agricultural dynamics, which is facilitated by spatial patterns and temporal shifts. Statistical and geographic data are used to completely study the effects of numerous variables, such as biological, economic, and environmental ones, on crop yield production. The goal of the project is to create precise and effective instruments that enable farmers to make knowledgeable decisions about their soil by combining machine learning with spiking neural networks.

The hidden costs of austerity for social programmes in the Global South: Qualitative insights from two complementary services in Ghana's Livelihood Empowerment Against Poverty Programme

AbstractPromoted by the International Monetary Fund (IMF) in particular, fiscal austerity measures have been extensively implemented across the world in the last decade as a policy prescription to address the impacts of economic shocks. Consequently, the implementation of austerity has engendered a vast body of austerity impact assessment literature in the Global North, in particular. Although austerity measures have been equally implemented (and longer) in Global South contexts, the same level of intellectual curiosity has not been dedicated to understanding the human and social costs of austerity in the Global South. To help fill this gap, this paper examines the implications of fiscal austerity for the delivery of two complementary programmes linked to Ghana's conditional cash transfer (CCT) — the Livelihood Empowerment Against Poverty (LEAP) programme. The paper adopts a qualitative design where semi‐structured interviews are conducted with (a) two LEAP officers, (b) two headteachers and (c) 35 LEAP beneficiaries in northern Ghana. The findings show that within the current context of fiscal austerity, mainly mediated through the government's commitment to “cut expenditures to the bone”, the two complementary services have been unfunded and thus do not exist in practice. The non‐existence of complementary services has dire consequences for children's education as well as undermines Ghana's poverty reduction attempts through the implementation of the LEAP programme.

Disease activity-guided dose optimisation including discontinuation of TNF-inhibitors in rheumatoid arthritis is effective for up to 10 years: an observational follow-up of the DRESS study.

To investigate safety and effectiveness of disease activity-guided dose optimisation of TNF-inhibitors in rheumatoid arthritis over 10 years. Observational long-term extension of a randomised study of participants who completed the 3-year extension of the DRESS-study. After the randomised phase (month 0-18), disease activity-guided dose optimisation was allowed for all. Main outcomes were mean time-weighted DAS28-CRP; biological and targeted synthetic anti-rheumatic drug (b/tsDMARD) use per year as proportion of daily defined dose; proportion of patients reaching discontinuation; durability, effectiveness of subsequent dose reduction attempts; and radiographic progression between 3 and 10 years using the Sharp-van der Heijde score. 170 patients were included of whom 127 completed 10-year follow-up. The mean disease activity remained low (DAS28-CRP 2.13, 95% confidence interval 2.10-2.16), whilst the b/tsDMARD dose reduced from 97% at baseline (95%CI 96% to 99%, n = 170)% to56% at year 10 (49% to 63%, n = 127). 119 of 161 participants (74%) with an optimisation attempt reached discontinuation, with a median duration of 7 months (interquartile range 3-33 months), and 25 participants never had to restart their b/tsDMARD (21%, 14% to 29%). The mean dose reduction after dose optimisation was 48% (n = 159) for the first optimisation attempt and 33% for subsequent attempt (n = 86). 48% (41/86) of participants had radiographic progression exceeding the smallest detectable change (5.7 units), and progression was associated with disease activity, not b/tsDMARD use. Long-term disease activity-guided dose optimisation of TNF-inhibitors in rheumatoid arthritis, including discontinuation and multiple tapering attempts, remains safe and effective.

Irreducible traumatic pure hip dislocation by the entrapment of the lateral rotator muscle group of the hip: A case report

Introduction: Irreducibility is a rare complication of pure posterior hip dislocation requiring surgical intervention. Case report: We present a case of a 22-year-old female with posterior hip dislocation following a motor vehicle accident. Despite unsuccessful closed reduction attempts, open surgical reduction successfully released the incarcerated muscles and achieved reduction. Follow-up examinations showed excellent functional outcomes without complications.

Rate of Successful Shoulder Reduction on First Confirmatory Imaging in the Emergency Department

BackgroundManagement of acute shoulder dislocation in the emergency department (ED) is common. ObjectiveThis study describes the rate, risk factors, and length of stay (LOS) associated with shoulder dislocation reduction failure in the ED. MethodsThe study was a retrospective case–control study of patients 18 years and older presenting to the ED with acute shoulder dislocation who underwent attempted reduction. Patients with successful reduction on post-reduction first confirmatory imaging are compared with those requiring multiple attempts. ResultsOf 398 ED encounters when a shoulder reduction was attempted in the ED, 18.8% (75/398 [95% CI 15.2–22.9%]) required multiple reduction attempts. Patients with successful reduction on first confirmatory imaging were more commonly male (80.2% [95% CI 75.6–84.3%] vs. 68.0% [95% CI 56.8–77.8%]; p = 0.0220), discharged home from the ED (95.4% [95% CI 92.6–97.3%] vs. 84.0% [95% CI 74.4–91.0%]; p = 0.0004), reduced using a traction/countertraction technique (42.1% [95% CI 36.8–47.6%] vs. 29.3% [95% CI 19.9–40.4%]; p = 0.0415), and less likely to have a pre-reduction fracture (26.0% [95% CI 21.4–31.0%] vs. 45.3% [95% CI 34.4–56.7%]; p = 0.0010). Mean length of stay (LOS) for those with successful reduction on first confirmatory imaging was 2 hours and 8 minutes shorter than for those with more than one attempt (p < 0.001). ConclusionsThe rate of failed first-pass reduction is higher than previously reported. Furthermore, the ED LOS was significantly longer in patients requiring multiple attempts. Knowledge of the failure rate and risk factors may raise physician awareness and guide future studies evaluating approaches for verification of reduction success.

Navigating Isolated Post-Traumatic Radial Head Dislocation in Adolescents: A Case Report from Bangladesh Emphasizing Management Strategies

Background: Isolated anterior dislocation of the radial head is a rare orthopedic injury, oftenpresenting with distinct clinical features and requiring specialized management. We report the case of an 18-year-old female who presented to our hospital 5 months post-injury, complaining of restricted left elbow joint movement and pain following a fall from a low chair at home. Clinical examination revealed tenderness and anterior dislocation of the radial head, confirmed by radiographs showing isolated anterior dislocation without associated fractures. Closed reduction attempts failed, leading to an open reduction of radial head in combination with correction of malignant with ulnar osteotomy and reconstruction of annular ligament and radio-ulnar Kirschner wire placement for stabilization. An upper arm cast was applied with the forearm in neutral rotation for six weeks. At the 12-month follow-up, the patient exhibited a satisfactory range of motion within reference values, comprising 0-140 degrees of flexion-extension arc, 70 degrees of pronation, and 85 degrees of supination. This range aligned with standards set by the American Society for Surgery of the Hand. The patient reported no impediments in daily activities and returned to her pre-injury level of sports activity based on the Tegner scale. This case underscores the complexity of managing isolated anterior radial head dislocation, highlighting the significance of prompt diagnosis, appropriate reduction techniques, and meticulous postoperative care to achieve optimal functional outcomes. Central Medical College Journal Vol 7 No 1 January 2023 Page: 57-62

A Rare Complication of Intraprosthetic Dissociation of Cemented Bipolar Hemiarthroplasty during Closed Hip Reduction: Case Report and Literature Review

AbstractHip hemiarthroplasty (HA) remains a frequently performed surgery for femoral neck fractures especially in the oldest, lowest demand patients. Debate persists concerning the optimal choice between unipolar and bipolar HA implants. A rare but important to recognize complication unique to bipolar HA is intraprosthetic dissociation (IPD). We review the literature on this rare phenomenon and identify predominant etiologies and implant components most involved in IPD, notably the role of hip dislocation and closed reduction in precipitating this complication. We also describe an elderly male patient with Parkinson's who experienced IPD of his bipolar HA during a closed reduction attempt. IPD typically requires open reduction and possibly revision of components, adding increased risk of reoperation/revision to those already frail and vulnerable to surgical complications.

Delayed presentation of lower cervical facet dislocations: What to learn from past reports?

Delayed presentation of lower cervical facet dislocations is uncommon, and there is no standardized way to approach these neglected injuries. The literature on neglected lower cervical facet dislocations is limited to case reports and few retrospective studies. This justifies the need for a comprehensive review of this condition. Our purpose was to elaborate a review on the epidemiology, clinical and radiological presentation, and treatment techniques and approach to these neglected injuries. Middle-aged adults from 30 to 50 represent 73.8% of reported cases, and most of them are males (72.0%). The most affected level is C5-C6 (43.0%). While most delays are due to missed injuries (52.1%) and ineffective non-operative treatment (36.2%), the other reason for delay is negligence in seeking medical care (11.7%). Patients present with variable degrees of neurological deficit, persistent neck pain, and neck stiffness. Reported approaches and techniques to reduce and stabilize these injuries are highly variable and depend on the surgeon's judgment, experience, and preference. Fibrotic tissues and bony fusion around the dislocated facet joint contribute to the reduction challenge, and 77.0% of closed reduction attempts fail. Anterior and posterior approaches to the cervical spine are used selectively or in combination for surgical release, reduction, and stabilization. Despite the lack of standardized treatment guidelines and different approaches, most of the authors reported improvement in pain, balance, and neurology post-surgery. Starting with the posterior surgical approach aims to achieve reduction compared to the anterior approach which largely aims at spinal decompression. Given the existing controversies, the need for quality prospective studies to determine the best treatment approach for lower cervical facet dislocations presenting with delay is evident.

Weakened casual feedback loops following intensive restoration efforts and climate changes in a large shallow freshwater lake

Understanding how phytoplankton interacts with local and regional drivers as well as their feedbacks is a great challenge, and quantitative analyses of the regulating role of human activities and climate changes on these feedback loops are also limited. By using monthly monitoring dataset (2000–2017) from Lake Taihu and empirical dynamic modelling to construct causal networks, we quantified the strengths of causal feedbacks among phytoplankton, local environments, zooplankton, meteorology as well as global climate oscillation. Prevalent bidirectional causal linkages between phytoplankton biomass (chlorophyll a) and the tested drivers were found, providing holistic and quantitative evidence of the ubiquitous feedback loops. Phytoplankton biomass exhibited the highest feedbacks with total inorganic nitrogen and ammonia and the lowest with nitrate. The feedbacks between phytoplankton biomass and environmental factors from 2000 to 2017 could be classified into two groups: the local environments (e.g., nutrients, pH, transparency, zooplankton biomass)-driven enhancement loops promoting the response of the phytoplankton biomass, and the climate (e.g., wind speed)-driven regulatory loops suppressing it. The two counterbalanced groups modified the emergent macroecological patterns. Our findings revealed that the causal feedback networks loosened significantly after 2007 following nutrient loading reduction and unsuccessful biomanipulation restoration attempts by stocking carp. The strength of enhancement loops underwent marked decreases leading to reduced phytoplankton responses to the tested drivers, while the climate (decreasing wind speed, warming winter)-driven regulatory loops increased– like a tug-of-war. To counteract the self-amplifying feedback loops, the present eutrophication mitigation efforts, especially nutrient reduction, should be continued, and introduction of alternative measures to indirectly regulate the critical components (e.g., pH, Secchi depth, zooplankton biomass) of the loops would be beneficial.