1.Quality of care among patients with acute heart failure at the emergency room and adherence of physicians at the University of the Philippines – Philippine General Hospital to the division of cardiovascular medicine – heart failure pathway:A retrospective cohort study.
Mark John D. Sabando ; Felix Eduardo R. Punzalan ; Frances Dominique V. Ho ; Tam Adrian P. Aya-ay ; Kevin Paul Da. Enriquez ; Marie Kirk A. Maramara ; Ronald Allan B. Roderos ; Lauren Kay M. Evangelista
Acta Medica Philippina 2026;60(2):22-32
OBJECTIVES
Clinical pathways (CPs) ensure adherence to heart failure (HF) management guidelines. To optimize quality care in a low resource setting, an evidence-based care pathway for the management of acute HF was implemented at the emergency department (ED) of the Philippine General Hospital (PGH), the designated national tertiary hospital and referral center. This study aimed to describe the characteristics of adults with acute HF admitted at the ED and evaluate the quality of care they received, measured using physician adherence to the hospital’s acute heart failure CP.
METHODSThis was a retrospective, descriptive cohort study. We reviewed the inpatient charts of all adult patients with acute HF admitted to the ED of the PGH and referred to the Division of Cardiovascular Medicine between December 1, 2022 and May 31, 2023. Quality of care was assessed based on adherence to quality indicators adapted from routine and conditional order sets detailed in the pathway. Descriptive statistics was utilized to describe patient characteristics, quality of care, and outcomes.
RESULTSTwo hundred thirty-six (236) patients were included, with a mean age of 51.8 years. Majority were male (53.4%); hypertension (61.4%) and ischemic heart disease (53.8%) were the most common comorbidities, and infection the most common precipitant of decompensation (60.6%). There were optimal adherence rates to routine orders, which included referrals to Internal Medicine and Cardiology, baseline vital signs monitoring, fluid intake and output monitoring, chest radiograph, complete blood count, blood urea nitrogen, sodium, potassium, prothrombin time, partial thromboplastin time, arterial blood gas, urinalysis, and N-terminal pro b-type natriuretic peptide. Conditional orders, such as oxygen support, focused echocardiography, thyroid - stimulating hormone, and the use of vasopressors, diuretics, and venous thromboembolism prophylactic agents, were optimally performed when warranted. However, we noted suboptimal adherence to certain resource-intensive conditional orders, such as hourly monitoring of urine output (61.4%), hooking to cardiac monitor (53.8%), and performance of 12-lead ECG within 10 minutes (56.8%). Further, only 43.9% of patients were referred to the intensive care unit. Troponin I, calcium, magnesium, and albumin were ordered in excess.
CONCLUSIONOverall adherence rate of physicians to the hospital’s Acute Heart Failure Pathway was satisfactory. Work is needed to improve adherence to hourly urine output monitoring, consistent hooking to cardiac monitor, and timely performance of 12-lead ECG – an effort that begins with expanding in-hospital diagnostic equipment and human resource supply. We recommend continuous pathway implementation with periodic evaluation and stakeholder feedback to further improve quality of care.
Human ; Male ; Female ; Middle Aged: 45-64 Yrs Old ; Adult ; Albumins ; Blood ; Blood Urea Nitrogen ; Calcium ; Cardiology ; Chart ; Charts ; Cohort Studies ; Critical Care ; Critical Pathways ; Diagnostic Equipment ; Disease ; Diuretics ; Echocardiography ; Electrocardiography ; Emergencies ; Emergency Service, Hospital ; Equipment And Supplies ; Evaluation Studies As Topic ; Feedback ; Heart ; Heart Diseases ; Heart Failure ; Hormones ; Hospitals ; Hospitals, General ; Humans ; Hypertension ; Indicators And Reagents ; Infection ; Infections ; Inpatients ; Intensive Care Units ; Internal Medicine ; Lead ; Magnesium ; Male ; Medicine ; Myocardial Ischemia ; Natriuretic Peptide, Brain ; Natriuretic Peptides ; Nitrogen ; Overall ; Oxygen ; Partial Thromboplastin Time ; Patients ; Peptides ; Philippines ; Physicians ; Potassium ; Prothrombin ; Prothrombin Time ; Quality Of Health Care ; Referral And Consultation ; Sodium ; Statistics ; Tertiary Care Centers ; Thorax ; Thromboembolism ; Thromboplastin ; Thyroid Gland ; Time ; Troponin ; Troponin I ; Universities ; Urea ; Urinalysis ; Urine ; Venous Thromboembolism ; Vital Signs ; Work ; Workforce
2.Novel approach of plate assisted buttressing in Hoffa fracture.
Amit SINGH ; Nirottam SINGH ; Gaurav SIWACH ; Mohit BANSAL ; Hemant JAIN ; Kishore RAICHANDANI
Chinese Journal of Traumatology 2025;28(3):175-180
PURPOSE:
Hoffa fracture is a femoral condyle fracture in the coronal plane. The lateral condyle is more commonly involved. The diagnosis is often difficult to detect with routine radiographs. Conservative management in this type of fracture resulted in nonunion, malunion, and other complications, such as stiff knee. Therefore, surgical management is mandatory in displaced fractures. Previous studies suggest only application of cancellous screw fixation, but these are not enough to counter vertical shear stress. Therefore, this study will evaluate the clinical outcomes of open reduction and internal fixation of Letenneur type I Hoffa fracture using cancellous screws with posterior buttressing plate.
METHOD:
This was a prospective cohort study conducted from March 2017 to July 2022 in orthopaedics department of tertiary care center after approval of institutional ethical committee. The study included 36 patients with Letenneur type I fractures treated by open reduction and internal fixation using posterior buttress plate and cancellous screws. Radiographs and clinical outcomes, range of movement (ROM), bone union, and knee society score (KSS) of patients were assessed at the end of 4 and 12 months in the follow-ups. All statistical analysis was done using Epi info version 7.2.1.0.
RESULTS:
In the 36 patients with Letenneur type I fracture, the majority belong to younger age group between 25 and 54 years with 22 males and 14 females. The modes of injury were road traffic accidents in 25 patients and fall from height in 11 patients. The right knee was involved in 21 cases and left was involved in 15 cases. Lateral condyle involvement was seen in 27 cases and medial condyle in 9 cases. All 36 patients with Letenneur type I Hoffa fracture were evaluated 4 months after surgical intervention. The notable improvements were observed in terms of ROM 120.4° ± 5.0° and KSS 85.0 ± 4.2. At the 12-month follow-up, considerably better outcomes were maintained regarding ROM 128.1° ± 5.2° and KSS 89.3 ± 4.8 with p < 0.05 which was statistically significant. At the final follow-up, all patients had routine fracture healing with a union time of (3.2 ± 3.4) months.
CONCLUSIONS
Fixation of Letenneur type I Hoffa fracture with cancellous screws and posterior buttress plate is effective, reliable and capable of providing adequate stability. Buttress plate assisted fixation is a valuable enhancement of the conventional technique of lag screw fixation of Hoffa fractures.
Humans
;
Bone Plates
;
Male
;
Female
;
Fracture Fixation, Internal/instrumentation*
;
Adult
;
Prospective Studies
;
Middle Aged
;
Femoral Fractures/surgery*
;
Bone Screws
;
Range of Motion, Articular
;
Young Adult
;
Aged
;
Hoffa Fracture
3.Dislocations deteriorate postoperative functional outcomes in supination-external rotation ankle fractures.
Sheng-Ye HU ; Mu-Min CAO ; Yuan-Wei ZHANG ; Liu SHI ; Guang-Chun DAI ; Ya-Kuan ZHAO ; Tian XIE ; Hui CHEN ; Yun-Feng RUI
Chinese Journal of Traumatology 2025;28(2):124-129
PURPOSE:
To assess the relationship between dislocation and functional outcomes in supination-external rotation (SER) ankle fractures.
METHODS:
A retrospective case series study was performed on patients with ankle fractures treated surgically at a large trauma center from January 2015 to December 2021. The inclusion criteria were young and middle-aged patients of 18 - 65 years with SER ankle fractures that can be classified by Lauge-Hansen classification and underwent surgery at our trauma center. Exclusion criteria were serious life-threatening diseases, open fractures, fractures delayed for more than 3 weeks, fracture sites ≥ 2, etc. Then patients were divided into dislocation and no-dislocation groups. Patient demographics, injury characteristics, surgery-related outcomes, and postoperative functional outcomes were collected and analyzed. The functional outcomes of SER ankle fractures were assessed postoperatively at 1-year face-to-face follow-up using the foot and ankle outcome score (FAOS) and American Orthopedic Foot and Ankle Society ankle hindfoot score and by 2 experienced orthopedic physicians. Relevant data were analyzed using SPSS version 22.0 by Chi-square or t-test.
RESULTS:
During the study period, there were 371 ankle fractures. Among them, 190 (51.2%) were SER patterns with 69 (36.3%) combined with dislocations. Compared with the no-dislocation group, the dislocation group showed no statistically significant differences in gender, age composition, fracture type, diabetes, or smoking history, preoperative waiting time, operation time, and length of hospital stay (all p > 0.05), but a significantly higher Lauge-Hansen injury grade (p < 0.001) and syndesmotic screw fixation rate (p = 0.033). Moreover, the functional recovery was poorer, revealing a significantly lower FAOS in the sport/rec scale (p < 0.001). Subgroup analysis showed that among SER IV ankle fracture patients, FAOS was much lower in pain (p = 0.042) and sport/rec scales (p < 0.001) for those with dislocations. American Orthopedic Foot and Ankle Society ankle hindfoot score revealed no significant difference between dislocation and no-dislocation patients.
CONCLUSION
Dislocation in SER ankle fractures suggests more severe injury and negatively affects functional recovery, mainly manifested as more pain and poorer motor function, especially in SER IV ankle cases.
Humans
;
Ankle Fractures/physiopathology*
;
Male
;
Female
;
Retrospective Studies
;
Adult
;
Middle Aged
;
Supination
;
Aged
;
Young Adult
;
Rotation
;
Joint Dislocations/surgery*
;
Fracture Fixation, Internal/methods*
;
Adolescent
;
Recovery of Function
;
Treatment Outcome
4.Posterior-only fixation in pelvic fractures: Is it sufficient in lateral compression injuries?
Sameer AGGARWAL ; Sandeep PATEL ; Lav MEHTA ; Mohak KATARIA ; Vishal KUMAR ; Prasoon KUMAR
Chinese Journal of Traumatology 2025;28(3):226-230
PURPOSE:
Lateral compression (LC) injuries account for more than two-thirds of all pelvic fractures. The goal of surgical treatment is to provide adequate stability and early mobilization. The consensus on posterior fixation of such injuries is strong in the literature; however, the necessity of anterior ring fixation is not clear. Therefore, this study was formulated to determine the practicability of posterior-only fixation in LC injuries.
METHODS:
Between March 2015 and May 2020, all patients with LC type pelvic ring fractures who were admitted and operated upon in a single level 1 trauma center were included in this cross-sectional observational study. Demographic data, co-morbidities, treatment, types of surgical fixation, concomitant injuries and surgeries, surgical complications, length of hospital stay, injury to weight bearing duration, and follow-up period were documented. Functional outcome and quality of life were assessed using Majeed score and SF-36 questionnaire. Non-normally distributed data were presented as median (Q1, Q3) and normally distributed data were presented as mean ± standard deviation (SD). Spearman's rank correlation coefficient was used for correlation analysis.
RESULTS:
A total of 25 patients were included, with a mean age of 29.8 years. All patients were managed operatively with posterior-only fixation. The median Majeed score was 90 (76, 95). The median physical component summary score was 69.37 (38.75, 85.62). The median mental component summary score was 63.95 (39.25, 87.87). There was no significant difference compared to population norms of both physical component summary and mental component summary. Injury to weight bearing time correlated significantly (p = 0.002) with Majeed score as well as SF-36 score (p = 0.044). No other variable had a significant association with outcomes.
CONCLUSION
Posterior-only fixation is sufficient for fixing LC injuries with up to 80% of cases having good to excellent functional outcomes. However, comparative studies with larger sample sizes are needed for further validation.
Humans
;
Male
;
Female
;
Adult
;
Cross-Sectional Studies
;
Pelvic Bones/surgery*
;
Fractures, Bone/surgery*
;
Fracture Fixation, Internal/methods*
;
Middle Aged
;
Young Adult
;
Quality of Life
;
Adolescent
;
Length of Stay
5.A new approach for percutaneous ilio-sacral screw fixation: CT-based pre-operative planning with conventional fluoroscopy to reduce malposition rate and operating time.
Xinyou HAN ; Qingsong FU ; Xinhua YUAN ; Weibin WANG
Chinese Journal of Traumatology 2025;28(5):342-351
PURPOSE:
Percutaneous ilio-sacral screw (ISS) insertion using conventional C-arm fluoroscopy has been a widely employed technique for pelvic posterior ring fixation, particularly in developing regions. However, this approach presents technical challenges, leading to a high malposition rate. We introduced a new method for ISS insertion without additional equipment or software and suggested whether it could reduce the malposition rate and operating time.
METHODS:
This is a retrospective cohort study. The study included all patients who underwent percutaneous ISS fixation between January 2020 and December 2022. Patients treated with open reduction or other types of implants were excluded. The patients were divided into 2 groups based on the screw insertion method: Group A utilized the traditional dual-plane adjustment method, while Group B received the newly introduced method. In all cases, conventional C-arm fluoroscopy was the sole guidance during the surgical procedure. Malposition rate, radiation exposure, and operating time were compared between groups. Post-operative CT scans were used to assess screw accuracy using the Smith grading method. The Student's t-test or the Mann-Whitney U test was chosen for comparing the quantitative variables based on the normality test results. The Chi-squared test was utilized for comparing qualitative variables.
RESULTS:
A total of 72 patients with pelvic posterior ring disruption treated with percutaneous ISS under conventional fluoroscopy guidance were included in this study. Among them, 32 patients were in Group A and 40 patients were in Group B. In Group B, the average operation duration per screw was 33 min with 29 fluoroscopy applications, which was significantly lower than that in Group A (44 min, p < 0.001, 38 times, p < 0.001, respectively). Furthermore, the post-operative CT scan revealed that only 10.7% (6/56) of screws in Group B were inappropriately positioned according to the Smith criteria.
CONCLUSION
The novel method introduced in this study demonstrated a reduction in both malposition rates and operating time compared to the traditional dual-plane adjustment method. Precise pre-operative CT planning in conjunction with conventional fluoroscopy could establish this method as a widely applicable technique for percutaneous ISS fixation.
Humans
;
Fluoroscopy/methods*
;
Retrospective Studies
;
Bone Screws
;
Female
;
Male
;
Tomography, X-Ray Computed/methods*
;
Sacrum/diagnostic imaging*
;
Middle Aged
;
Operative Time
;
Adult
;
Fracture Fixation, Internal/methods*
;
Ilium/diagnostic imaging*
;
Aged
6.Comparative analysis of the safety and efficacy of fenestrated pedicle screw with cement and conventional pedicle screw with cement in the treatment of osteoporotic vertebral fractures: A meta-analysis.
Li CAO ; Hong-Jie XU ; Yi-Kang YU ; Huan-Huan TANG ; Bo-Hao FANG ; Ke CHEN
Chinese Journal of Traumatology 2025;28(2):101-112
PURPOSE:
Bone cement-reinforced fenestrated pedicle screws (FPSs) have been widely used in the internal fixation and repair of the spine with osteoporosis in recent years and show significant improvement in fixation strength and stability. However, compared with conventional reinforcement methods, the advantages of bone cement-reinforced FPSs remain undetermined. This article compares the effects of fenestrated and conventional pedicle screws (CPSs) combined with bone cement in the treatment of osteoporosis.
METHODS:
A clinical control study of FPSs and CPSs combined with bone cement reinforcement in osteoporotic vertebral internal fixation was performed using the database PubMed, Embase, Cochrane Library, CNKI, the Wanfang, and the China Biomedical Literature Service System. Two evaluators screened the relevant literature in strict accordance with the inclusion criteria (diagnosis of participants, type of clinical study, treatment with FPS and CPS, and outcome indicators) and exclusion criteria (duplicate literature and missing or incorrect data) and independently conducted data extraction and quality evaluation. Clinical control studies of direct comparison between FPS and CPS combined with bone cement reinforcement in patients who were definitively diagnosed with thoracolumbar fractures or spinal degenerative diseases were included. Quality evaluation was conducted using the Cochrane risk bias evaluation tool for randomized controlled studies and using the Newcastle-Ottawa scale for retrospective case-control studies. RevMan software (version 5.3) was used for the meta-analysis to compare the clinical efficacy, radiological results, and related complications of the 2 methods.
RESULTS:
A total of 13 articles were included, including 7 randomized controlled studies and 6 retrospective case-control studies. There were 909 patients in these studies, 451 in the FPS and polymethyl methacrylate (FPS & PMMA) group and 458 in the CPS and polymethyl methacrylate (CPS & PMMA) group. The results of the meta-analysis showed that there was no significant difference between the 2 groups in operation time, hospital stay, visual analogue score, Japanese orthopaedic association score, Oswestry disability index score, Cobb angle, vertebral body deformation index and fusion rate (p > 0.05). The mean difference of intraoperative bleeding volume was -10.45, (95% confidence intervals (CI) (-16.92, -3.98), p = 0.002), the mean difference of loss height of the anterior edge of the vertebral body after surgery was -0.69 (95% CI (-0.93, -0.44), p < 0.001), and the relative risk (RR) of overall complication rate was 0.43 (95% CI (0.27, 0.68), p < 0.001), including the RR of bone cement leakage rate was 0.57 (95% CI (0.39, 0.85), p = 0.005). The screw loosening rate (RR = 0.26, 95% CI (0.13, 0.54), p < 0.001) of the FPS group was significantly lower than that of the CPS group.
CONCLUSION
The existing clinical evidence shows that compared with the CPS combined with bone cement, the use of FPS repair in the internal fixation of an osteoporotic vertebral body can reduce the amount of intraoperative bleeding, be more conducive to maintaining the height of the vertebral body, and significantly reduce the incidence of postoperative complications such as bone cement leakage and screw loosening.
Humans
;
Pedicle Screws
;
Bone Cements
;
Spinal Fractures/surgery*
;
Osteoporotic Fractures/surgery*
;
Fracture Fixation, Internal/instrumentation*
7.Efficacy and safety of conventional biplanar and triangulation method for sacroiliac screw placement in the treatment of unstable posterior pelvic ring fractures: A real-world retrospective cohort study.
Yu-Bo ZHENG ; Xing HAN ; Xin ZHAO ; Xi-Guang SANG
Chinese Journal of Traumatology 2025;28(5):336-341
PURPOSE:
The fixation method commonly employed worldwide for treating unstable fractures of the posterior pelvic ring is the percutaneous iliosacral screw technique. However, prolonged operation time and frequent fluoroscopies result in surgical risks. This study aimed to investigate whether a new triangulation method could reduce operative and fluoroscopy times and increase the accuracy of screw placement.
METHODS:
This study is a real-world retrospective cohort analysis that examined a patient cohort who underwent percutaneous iliosacral screw fixation between January 1, 2019 and December 31, 2022. Inclusion criteria were patients (1) diagnosed with posterior pelvic ring instability who underwent pelvic fracture closed reduction and percutaneous S1 transverse-penetrating iliosacral screw placement and (2) aged >18 years. Exclusion criteria were: (1) combined proximal femoral fractures, (2) severe soft tissue injury in the surgical area, (3) incomplete imaging data, and (4) declining to provide written informed consent by the patient. The patients were divided into 2 groups according to the screw insertion method: conventional and triangulation methods. Screw placement and fluoroscopy times recorded by the C-arm were compared between the 2 methods. The accuracy of screw placement was evaluated by Smith grading on postoperative CT. Normality tests were conducted to assess the distribution of the quantitative variables and the Chi-square test was used to compare the qualitative variables.
RESULTS:
The study included a total of 94 patients diagnosed with posterior pelvic ring instability, who underwent percutaneous iliosacral screw placement. The patients were divided into 2 groups: 46 patients treated with the conventional surgical method and 48 patients received the triangulation method. The operation time (61.13±9.69 vs. 35.77±6.27) min and fluoroscopy frequency times (52.15±9.29 vs. 24.40±4.04) of the triangulation method were significantly reduced (p<0.001).
CONCLUSIONS
The use of a triangular positioning technique for the surface positioning of percutaneous iliosacral screws could reduce the operative time and fluoroscopy frequency. And the screw placement accuracy using this new method was comparable to that using other conventional methods.
Humans
;
Retrospective Studies
;
Bone Screws
;
Pelvic Bones/surgery*
;
Male
;
Female
;
Fracture Fixation, Internal/methods*
;
Fractures, Bone/surgery*
;
Adult
;
Middle Aged
;
Fluoroscopy
;
Aged
;
Sacrum/surgery*
;
Operative Time
8.Comparison of hook plates vs. locking plates for Neer type IIB fractures of lateral end clavicle: A systematic review.
Ravi PATEL ; Muhammad Murtaza KHAN ; William GIBSON ; Robin BANERJEE ; Asif PARDIWALA
Chinese Journal of Traumatology 2025;28(4):269-275
PURPOSE:
Surgical management of the lateral end of clavicle fractures has been a challenge for orthopedic surgeons considering the high rate of non-union. There has been no right and wrong answer to these types of fractures and many methods discussed in the literature, but the 2 most used bony procedures are hook plate and locking plate with or without the use of supplementary soft tissue procedures. The available evidence, in this case, is scarce with questionable reliability. The idea of this systemic review is to promote evidence-based practice when choosing between the 2 implants for this fracture. This study aims to review the results by performing a systemic review of the literature comparing the results of locking plate vs. hook plate for the lateral end of clavicle fracture fixation with an emphasis on outcome and associated complications.
METHODS:
A search of the literature was made with the keyword "clavicle" in PubMed/Ovid Medline/Embase and University of Edinburgh online library "discover Ed". A total of 4063 articles were identified including case series (with at least 3 cases) and review articles focusing on locking plate alone, comparisons of locking plate and hook plate, or hook plate alone. Articles were excluded if they were not published in English, focused on pediatric studies, or consisted only of book chapters. Studies examining tension band wiring, soft tissue procedures for fracture fixation, arthroscopic-assisted procedures, additional soft tissue procedures along with plate fixation, and fracture dislocation of the lateral end of the clavicle were also excluded. The search was then narrowed down to 21 articles after consideration of inclusion and exclusion criteria. A detailed review of the surgical methodology further excluded additional soft tissue procedures, resulting in a final selection of 15 studies. The quality of the studies was assessed using the Modified Coleman Score by the authors.
RESULTS:
A total of 15 studies related to Neer type II fracture met the inclusion criteria. However, 2 other studies also included type V fracture as well. The mean age of patients in these studies was 32 years. The mean follow-up period was 24.3 months (ranging from 6 to 65 months). The time of radiological union was documented from 2 to 4.5 months. Constant and disabilities of arm, shoulder, and hand scores were most used as the criteria for patient outcomes. The size of the lateral fragment that can accommodate/provide bicortical fracture was documented in only 3 studies. The mean incidence of removal of hook plate was 86.9%. In contrast, the mean incidence of removal of locking plate was 27.0%. Superficial wound infection was documented in 5 studies and deep wound infection was seen in 1 study. The mean union rate for hook plate was 97.0% compared to 100% for locking plate. Complications associated with hook plate have been documented in 11 studies. The most commonly reported incidence of complication was acromial osteolysis. The quality of studies was assessed using modified Coleman score. Other than 2 studies that were considered for the study that met the "fair" standard all of them were considered "poor" based on the modified Coleman score.
CONCLUSION
Both hook plate and locking plate provide acceptable operative treatment options for the lateral end of clavicle fracture. However, a consideration of surgeons' experience, the likelihood of a second operation, and the size of the lateral fragment should be considered when choosing between the 2 types of implants.
Humans
;
Clavicle/surgery*
;
Bone Plates
;
Fractures, Bone/surgery*
;
Fracture Fixation, Internal/instrumentation*
9.Analysis of recurrent cervical abscess: a case report.
Junxin WANG ; Hui WANG ; Maogang SUN ; Endong ZHANG ; Zhonghua ZHANG
Journal of Clinical Otorhinolaryngology Head and Neck Surgery 2025;39(6):574-577
This report presents a case of esophageal fistula with recurrent cervical abscess as the initial symptom. The patient underwent anterior cervical fracture reduction and internal fixation in 2021 due to trauma. In 2023, the patient received radiofrequency ablation for bilateral thyroid lobe lesions, after which recurrent cervical abscesses occurred over an 8-month period. Fiberoptic laryngoscopy with the biopsy channel insufflation method revealed a large esophageal fistula at the esophageal inlet. After removing the internal fixation plate, the patient received daily wound care, and serial fiberoptic laryngoscopy revealed spontaneous healing of the esophageal fistula. During the 1-year follow-up, no recurrence of cervical abscess was observed, and the esophageal fistula healed well.
Humans
;
Abscess
;
Recurrence
;
Neck
;
Female
;
Adult
;
Fracture Fixation, Internal
10.Biomechanical analysis of a novel bridging plate for treating Rockwood III acromioclavicular joint dislocation.
Yancai CHEN ; Gaofeng ZHANG ; Shubo LI ; Nianxiang LUO ; Yi ZHANG
Journal of Southern Medical University 2025;45(5):1103-1112
OBJECTIVES:
To assess the biomechanical performance of a novel bridging plate for treating Rockwood III acromioclavicular joint dislocation.
METHODS:
A novel bridging plate structure was designed based on CT data from a patient with Rockwood type III acromioclavicular joint dislocation, and a finite element model of the bridging plate-acromioclavicular joint interaction was constructed. The stress and deformation characteristics and biomechanical compatibility of the plate under post-reduction, normal loading, and impact loading conditions were analyzed to evaluate its fixation mechanism and clinical advantages.
RESULTS:
The stiffness of the bridging system was 27.78 N/mm, close to that of acromioclavicular joint ligaments (26.05 N/mm) and meeting the requirements for flexible deformation. Under normal loading, the maximum stress in the bridging system was 88.29 MPa to sustain physiological activities; under impact loading, the maximum stress reached 480 MPa, and the cable underwent plastic deformation to dissipate energy and effectively buffer local stress concentrations, thereby reducing the risk of rigid bone fractures. The high-stress regions in the bone primarily occurred at the edges of the C1-C4 screw holes. The maximum bone stress was 0.762 MPa under normal loading and 5.963 MPa under impact loading, accounting for 2.86% and 1.66% of the corresponding bolt stresses, respectively.
CONCLUSIONS
The novel bridging plate is better adapted to biomechanical characteristics of the acromioclavicular joint compared to traditional internal fixation. This fixation system provides sufficient stability while allowing physiological micromotion to facilitate postoperative rehabilitation. Significant flexible deformation can occur at the connection between the fixation ring and the cable, and brittle materials should not be used in this region. The issue of stress concentration at the C1-C4 screw holes requires special attention in its clinical application.
Acromioclavicular Joint/surgery*
;
Humans
;
Bone Plates
;
Biomechanical Phenomena
;
Finite Element Analysis
;
Joint Dislocations/surgery*
;
Fracture Fixation, Internal/methods*


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