Clinical significance of miR-200a in systemic lupus erythematosus and renal damage in children.

The purpose was to analyze the clinical significance of miR-200a in children with initially diagnosed SLE and renal damage. Children with initially diagnosed SLE (n=100) and healthy children (n=50) undergoing physical examinations during the same period were recruited. Disease activity of SLE children was determined based on SLEDAI (systemic lupus erythematosus disease activity index), and they were divided to SLEDAI≤9 group and SLEDAI>9 group, respectively. Moreover, SLE children were divided to LN group and non-LN group based on the occurrence of lupus nephritis. Differential level of miR-200a between groups was detected by qRT-PCR. Spearman correlation test was conducted to analyze the influence of miR-200a on SLEDAI and other laboratory indexes of SLE children. Its diagnostic potential in SLE and LN was assessed through depicting ROC curves. MiR-200a level was remarkably lower in SLE children than that of healthy children. Lower level of miR-200a was detected in SLE children with high SLEDAI or accompanied LN. MiR-200a level was negatively correlated to SLEDAI (r=-0.425), ESR (r=-0.284), CRP (r=-0.338), BUN (r=-0.263) and Scr (r=-0.345), while it was positively correlated to C3 (r=0.631), C4 (r=0.524) and ALB (r=0.394) in SLE children. The AUC of miR-200a in diagnosing SLE was 0.8379 (cut-off value=2.225, sensitivity=70%, specificity=70%). Besides, the AUC of miR-200a in diagnosing LN was 0.7619 (cut-off value=2.005, sensitivity=80%, specificity=76%). MiR-200a level has a certain correlation to the disease activity of children with initially diagnosed SLE, which can be utilized as an adjuvant indicator in evaluating SLE severity. Meanwhile, miR-200a has predictive value for SLE-induced renal damage.

A unilateral external fixator combined with bone transport and tibio-talar fusion for the treatment of severe postoperative infection of peri-ankle fractures: retrospective analysis of 32 cases.

BACKGROUND: To investigate the clinical effects of a unilateral external fixator combined with bone transport and tibio-talar fusion in the treatment of severe postoperative infection of peri-ankle fractures. METHODS: The clinical data of 32 patients (22 men and 10 women) with severe postoperative infection of peri-ankle fractures were retrospectively analyzed. Patients' age ranged from 26 to 62 (mean, 42 ± 9.5) years old. The types of fractures were distal tibia fracture (25 cases), distal tibia and fibula fracture (5 cases), and talus fracture (2 cases). All patients underwent treatment with unilateral external fixation combined with bone transport and tibio-talar fusion. 6 patients with severe infection received two-stage treatment involving focal debridement and external fixation, osteotomy, and bone transport. The remaining 26 patients underwent debridement, external fixation, and osteotomy simultaneously. The length of bone transport, total fixation time of the external fixator, and postoperative complications were recorded for all patients. The efficacy of the treatment was assessed using the American Association of Foot and Ankle Society (AOFAS) ankle-hindfoot score. RESULTS: Patients were followed up for 16-36 months, with an average follow-up time of 24 months. The length of tibia bone transport ranged from 5 to 15 cm, with a mean length of 8.5 cm. The external fixator was applied for 12-24 months, with an average duration of 16 months. One patient suffered from refracture at tibio-talar fusion site, and one patient had external fixation pin-tract infection. No complications, such as recurrent infections (especially the MRSA infection), poor mineralization, refracture, iatrogenic nerve damage or fusion failure, were found in the remaining patients. The preoperative AOFAS ankle-hindfoot function score was 40.0 ± 3.8 (range, 30-52) points, and it increased to 75.0 ± 3.0 (range, 67-78) points at the last follow-up. CONCLUSION: A unilateral external fixator combined with bone transport and tibio-talar fusion is an effective method for treating severe postoperative infection of peri-ankle fractures. This approach is capable of reconstructing large bone defects that remain after clearing the infected lesion. Additionally, it provides stability to the ankle, enhances ankle-hindfoot function, and improves the patient's quality of life.

Biomechanical tests and finite element analyses of pelvic stability using bilateral single iliac screws with different channels in lumbo-iliac fixation.

Background: In lumbo-iliac fixation, the iliac screw can be placed in several locations and directions. There is no uniform standard for the placement of a single iliac screw. Biomechanical tests and finite element analyses were used to compare the effect of bilateral single iliac screws with three channels on pelvic stability to determine the best channel. Methods: Five embalmed adult cadaver pelvic specimens were selected. An unstable Tile C1 pelvic injury model was established. Lumbo-iliac fixation for the treatment of left sacral Denis II fracture includes the following: three channels of bilateral, single iliac screws (channel A from posterior superior iliac spine (PSIS) to anterior inferior iliac spine (AIIS), channel B from 1 cm medial and 1 cm caudal of PSIS to AIIS, and channel C from 2 cm below PSIS to AIIS). Biomechanical testing was performed for stiffness evaluations. A finite element model was established to study the stress distribution of the model and the maximum von Mises stress of internal fixation. Results: Biomechanical tests revealed that under vertical compression loading. The compressive stiffness fixed by channel B (246.15 ± 27.85 N/mm) was better than that fixed by channel A and channel C. Under torsional load, the torsional stiffness fixed by channel B (2.234 ± 0.223 N·m/°) was stronger than that fixed by channel A and channel C. However, there was no significant difference in terms of compressive and torsional stiffness between channel B and channel A (P > 0.05). Finite element analyses conformed that the maximum von Mises stress of the internal fixator fixed in channel B under the conditions of vertical, forwards bending, backwards extension, left bending, left rotating, and right bending (213.98 MPa, 338.96 MPa, 100.63 MPa, 297.06 MPa, 200.95 MPa and 284.75 MPa, respectively) was significantly lower than those fixed in channel A and channel C. Conclusions: The construct stiffness of the channel from 1 cm medial and 1 cm caudal of PSIS to AIIS is better than that of the other two channels. This channel has the advantages of good biomechanical stability, small maximum von Mises stress of internal fixation.

Management of Open Tile C Pelvic Fractures and Their Outcomes: A Retrospective Study of 30 Cases.

Background: Open Tile C pelvic fractures are particularly severe. However, reports on their management and outcomes are relatively rare. This study analyzed the demographic and clinical characteristics of patients with open Tile C pelvic fractures and describes our management and outcomes of these injuries. Methods: This retrospective review included all patients with open Tile C pelvic fractures treated in our department between January 2014 and June 2021. Data on patient demographics, characteristics of the injuries, surgical management, and outcomes were analyzed. Results: Thirty patients with a mean age of 34.0 years met the diagnostic criteria. The average Injury Severity Score was 40.3. According to the Tile fracture classification, 6 patients sustained type C1.1, 12 sustained type C1.2, 3 sustained type C1.3, 5 sustained C2 and 4 sustained type C3. Most patients had soft tissue injuries in multiple zones. All patients sustained associated injuries. Management consisted of bed rest in 8 cases, external fixation as the final strategy in 14, conversion from external fixation to internal fixation in 3, open reduction with internal fixation in 5, and amputation in 6. The average amount of packed red blood cells transfused was 33.3 units, the average intensive care unit stay was 11.3 days, the mean number of operations required was 6.2, and the mean length of hospital stay was 81.8 days. The main complications were early soft tissue infections and venous thrombosis. One patient died of sepsis and multi-organ failure. Soft tissue injuries in multiple zones increased utilization of hospital resources whereas anorectal injuries did not. Vascular damage accompanying truck crush injuries had a high amputation rate. Conclusion: Open Tile C pelvic fractures require multidisciplinary diagnosis and management and consume considerable hospital resources. More emphasis needs to be placed on this complex injury.

Role of pelvic packing in the first attention given to hemodynamically unstable pelvic fracture patients: a meta-analysis.

PURPOSE: To evaluate the effectiveness of pelvic packing (PP) in pelvic fracture patients with hemodynamic instability. MATERIALS AND METHODS: Three databases-PubMed, Embase and the Cochrane Library-were systematically searched to identify studies presenting comparisons between a protocol including PP and a protocol without PP. Mortality, transfusion requirement and length of hospitalization were extracted and pooled for meta-analysis. Relative risk (RR) and standard mean difference (SMD), along with their confidence intervals (CIs), were used as the pooled statistical indices. RESULTS: Eight studies involving 480 patients were identified as being eligible for meta-analysis. PP usage was associated with significantly reduced overall mortality (RR = 0.61, 95% CI = 0.47-0.79, p < 0.01) as well as reduced mortality within 24 h after admission (RR = 0.42, 95% CI = 0.26-0.69, p < 0.01) and due to hemorrhage (RR = 0.26, 95% CI = 0.14-0.50, p < 0.01). The usage of PP also decreased the need for pre-operative transfusion (SMD = - 0.44, 95% CI = - 0.69 to - 0.18, p < 0.01), but had no influence on total transfusion during the first 24 h after admission (SMD = 0.05, 95% CI = - 0.43-0.54, p = 0.83) and length of hospitalization (ICU stay and total stay). CONCLUSIONS: This meta-analysis indicates that a treatment protocol including PP could reduce mortality and transfusion requirement before intervention in pelvic fracture patients with hemodynamic instability vs. angiography and embolization. This latter technique could be used as a feasible and complementary technique afterwards.

MRA improves sensitivity than MRI for the articular-sided partial-thickness rotator cuff tears.

BACKGROUND: This study aims to compare the diagnostic accuracy of magnetic resonance imaging (MRI) and MR arthrography (MRA) for the articular-sided partial-thickness rotator cuff tear (PTRCT). METHODS: Three electronic databases, PubMed/Medline, Embase and Cochrane Library, were utilized to retrieve articles comparing the diagnostic value of MRA and MRI for detecting articular-sided PTRCTs. The pooled statistical indexes included sensitivity, specificity, positive/negative predictive value, diagnostic odds ratio (DOR) and the area under the receiver operating characteristic curve (AUC). RESULTS: Eleven studies involving 1703 patients and 1704 shoulders were included. The pooled sensitivity, specificity, DOR and AUC and their 95% CIs of MRA to diagnose articular-sided PTRCTs were 0.81 (95% CI, 0.65-0.90), 0.96 (95% CI, 0.91-0.98), 68.14 (95% CI, 33.20-139.84) and 0.96 (95% CI, 0.94-0.97), respectively. The pooled sensitivity, specificity, DOR and AUC and their 95% CIs of MRI were 0.78 (95% CI, 0.65-0.87) and 0.97 (95% CI, 0.84-0.99), 47.82 (95% CI, 8.29-275.89) and 0.89 (95% CI, 0.86-0.92), respectively. CONCLUSIONS: This meta-analysis reveals that MRA has a better diagnostic value than that of MRI for the diagnosis of articular-sided partial-thickness rotator cuff tears because of an improvement of sensitivity.

Salvage of vascular graft infections via vacuum sealing drainage and rectus femoris muscle flap transposition: A case report.

BACKGROUND: The management of vascular graft infections continues to be a significant challenge in a clinical situation. The aim of this report is to illustrate the novel vacuum sealing drainage (VSD) technique and rectus femoris muscle flap transposition for vascular graft infections, and to evaluate the prospective of future testing of this surgical procedure. CASE SUMMARY: We report the case of a 32-year-old male patient, who presented a severe infected groin wound with biological vascular graft Acinetobacter baumannii infection resulting in extensive graft exposure. Using the VSD and muscle flap trans-position, the groin wound and vascular graft infection were finally treated successfully. CONCLUSION: Our case report highlights that VSD technique and rectus femoris muscle flap transposition could be considered in patients presenting with a severe infected groin wound with biological vascular graft Acinetobacter baumannii infection resulting in extensive graft exposure, especially in consideration of treatable conditions.

Treatment of Chronic Anterior Shoulder Dislocation by Coracoid Osteotomy with or without Bristow-Latarjet Procedure.

OBJECTIVE: To investigate the clinical efficacy and outcomes of the coracoid osteotomy with or without Bristow-Latarjet procedures in the treatment of chronic anterior shoulder dislocation (CASD). METHODS: Between January 2013 and January 2019, 20 shoulders of 18 patients who were diagnosed with chronic anterior dislocation and underwent open reduction in our trauma center were retrospectively studied. Open coracoid osteotomy with Bristow-Latarjet procedures were performed on 16 shoulders and open coracoid osteotomy without Bristow-Latarjet procedures were performed on four shoulders. Open coracoid osteotomy with or without Bristow-Latarjet procedures were chosen on the basis of the stability of the shoulder after reduction. Outcomes were assessed preoperatively and postoperatively with the visual analog scale (VAS) for pain, the American Shoulder and Elbow Surgeons (ASES) score, the University of California Los Angeles (UCLA) shoulder rating scale, and the range of motion (ROM) for shoulder activity. RESULTS: There were three males and 15 females with an average age of 60.94 ± 2.69 years. The time between dislocation and treatment ranged from 21 to 240 days with an average of 73.3 ± 14.4 days. All patients were available for a mean follow-up of 15.2 ± 4.3 months. No procedure-related death or incision-related superficial or deep tissue infection was identified in all cases. No iatrogenic neurovascular injuries or fractures were found in this study. At the time of 12 months follow-up, the range of motion and the shoulder functional evaluation (VAS [P < 0.001], ASES [P < 0.001], and UCLA score [P < 0.001]) in patients who underwent Bristow-Latarjet procedures were significantly improved. Subluxation after surgical procedure was found and confirmed in one patient and this patient refused to undergo revision surgery. According to the Samilson and Prieto classification system, 16 shoulders were assessed as grade 0, three shoulders were grade 1, one shoulder was grade 2. CONCLUSIONS: Coracoid osteotomy with or without Bristow-Latarjet procedure yielded an acceptable clinical result in this study. This method has the advantages of enlarging the exposure of surgical field, assisting reduction of shoulder, and convenient conversion to Bristow-Latarjet procedure. It is an efficient and reliable method for treatment of chronic anterior shoulder dislocation. A 69-year-old woman diagnosed with right chronic anterior shoulder dislocation with large Hill-Sachs lesion. The latarjet procedure with remplissage technique was applied for this patient.

Comparisons of the surface micromotions of cementless femoral prosthesis in the horizontal and vertical levels: a network analysis of biomechanical studies.

BACKGROUND: Numerous quantitatively biomechanical studies measuring the fixation stability of femoral stem using micromotions at the bone-implant interfaces in different directions and levels remain inconclusive. This network meta-analysis performed systematically aims to explore the rank probability of micromotions at the bone-implant interfaces based on biomechanical data from studies published. METHODS: Two electronic databases, PubMed/MEDLINE and Embase, were utilized to retrieve biomechanical studies providing the data of micromotions at the bone-stem interfaces. After screening and diluting out, the studies that met inclusion criteria will be utilized for statistical analysis. In order to contrast the stability of commonness and differences of the different parts of the femoral stem, the horizontal and vertical comparison of micromotions at the bone-implant interfaces were conducted using the pooled evaluation indexes including the mean difference (MD) and the surface under the cumulative ranking (SUCRA) curve, while inconsistency analysis, sensitivity analysis, subgroup analyses, and publication bias were performed for the stability evaluation of outcomes. RESULTS: Screening determined that 20 studies involving a total of 249 samples were deemed viable for inclusion in the network meta-analysis. Tip point registered the highest micromotions of 13 measurement points. In the horizontal level, the arrangements of 4 measurement points at the proximal (P1-P4), middle (P5-P8) and distal part of the stem (P9-P12) were P1 = P2 = P3 = P4, P7 > P8 > P6 = P5 and P10 ≥ P12 = P9 = P11, respectively. In the vertical level, the arrangements of 3 measurement points at the anterior, posterior, medial, and lateral directions was P9 > P5 = P1, P10 > P6 > P2, P11 > P7 > P3, and P12 > P8 > P4, respectively. CONCLUSION: The network meta-analysis seems to reveal that the distal part of the femoral stem is easier to register higher micromotion, and tip point of femoral stem registers the highest micromotions.

Surgical Treatment and Rehabilitation for Hoffa Fracture Nonunion: Two Case Reports and a Literature Review.

BACKGROUND: A coronal fracture of the distal femoral condyle, known as a Hoffa fracture, seldom occurs and is easy to misdiagnose. Surgery treatment, including open anatomic reduction and internal fixation, is the primary method of treatment. However, cases involving nonunion are extremely rare. CASE PRESENTATION: We reported two cases in a 56-year-old female who visited our outpatient clinic with complaints of locking sensation, swelling, and pain, and a 64-year-old male patient who need additional care after having undergone surgery for a distal femur fracture. They presented with nonunion ofa Hoffa fracture (Letenneur type II), and these cases of nonunion were resolved surgically with debridement, two cannulated lag screws, a lateral extra-articular buttress plate, and the liberal use of autologous bone grafts. After surgery, the two patients were allowed to bear partial weight and perform exercises. They were allowed to walk with full weight-bearing after 3 months. No early complications, such as infection and loss of reduction, were noted after the revision surgery. At the one-year follow-up, both patients had excellent function and reported minimal pain, with a Lysholm score of 94. CONCLUSIONS: Our case reports highlight the importance of the liberal use of autologous bone grafts, which allow stable reconstruction of the affected femoral condyle, thereby restoring joint congruence. A lateral extra-articular buttress plate in combination with two cannulated lag screws is recommended for nonunion in Hoffa fracture patients, and they need to be closely followed up to detect complications promptly, especially those related to nonunion.

Management of comminuted patellar fracture fixation using modified cerclage wiring.

BACKGROUND: Although there are several different kinds of fixation techniques for displaced comminuted patellar fracture, the treatment remains a challenge for orthopaedic surgeons. The purpose of this study is to evaluate the effectiveness and safety of a fixation technique for comminuted patellar fracture fixation using modified cerclage wiring. METHODS: From February 2016 to April 2018, 38 cases of simple unilateral closed comminuted patellar fracture were treated by modified cerclage wiring. Among these cases, 16 patients were males and 22 were females, aged 23-68 years (average 40.4 ± 9.1 years). Comminuted patellar fractures were classified according to the AO/OTA classification: 10 cases were type 34-C2 (three fragments), 28 cases were type 34-C3 (more than three fragments). Postoperative complications including loosening of internal fixation, fragment re-displacement, nonunion, infection, breakage of internal fixation and traumatic osteoarthritis were assessed. The clinical results after operation were evaluated by the clinical grading scales of Böstman including range of movement, pain, work, atrophy, assistance in walking, effusion, giving way, and stair-climbing during follow-up. RESULTS: A total of 38 patients were followed up for 6-36 months (mean time 16.1 ± 5.8 months). The bone union radiographically occurred at approximately 2.5-3.5 months (mean time 2.92 ± 0.25 months). No postoperative complications, such as infection, dislocation, breakage of the implants, painful hardware, and post-traumatic osteoarthritis, were observed. According to the clinical grading scales of Böstman, satisfactory results were obtained, and the mean score at the final follow-up was 28.7 (range 20-30) points. Thirty-two patients (84.2%) with excellent results had a mean score of 29.5 ± 0.7 (range 28-30) points, and six patients (15.8%) with good results had a mean score of 24.5 ± 2.2 (range 20-27) points. The patients with excellent and good scores had active flexion of 130° (110-140). CONCLUSIONS: Modified cerclage wiring can effectively treat comminuted patellar fracture and offers a new strategy resulting in satisfactory results without obvious complications.

5-Azacytidine and trichostatin A enhance the osteogenic differentiation of bone marrow mesenchymal stem cells isolated from steroid-induced avascular necrosis of the femoral head in rabbit.

Bone marrow mesenchymal stem cells (BMSCs) play an important role in the process of bone repair. The present study investigated the effect of 5-azacytidine (AZA) and trichostatin A (TSA) on BMSC behaviors in vitro. The role of WNT family member 5A (WNT5A)/WNT family member 5A (WNT7A)/beta-catenin signaling was also investigated. BMSCs were isolated from a steroid-induced avascular necrosis of the femoral head (SANFH) rabbit model. The third-generation of BMSCs was used after identification. The results revealed obvious degeneration and necrosis in the SANFH rabbit model. AZA, TSA and TSA + AZA increased BMSC proliferation in a time-dependent fashion. AZA, TSA and TSA + AZA induced the cell cycle release from the G0/G1 phase and inhibited apoptosis in BMSCs. AZA, TSA and TSA + AZA treatment significantly decreased caspase-3 and caspase-9 activities. The treatment obviously increased the activity and relative mRNA expression of alkaline phosphatase. The treatment also significantly up-regulated the proteins associated with osteogenic differentiation, including osteocalcin and runt-related transcription factor 2 (RUNX2), and Wnt/beta-catenin signal transduction pathway-related proteins beta-catenin, WNT5A and WNT7A. The relative levels of Dickkopf-related protein 1 (an inhibitor of the canonical Wnt pathway) decreased remarkably. Notably, TSA + AZA treatment exhibited a stronger adjustment ability than either single treatment. Collectively, the present studies suggest that AZA, TSA and TSA + AZA promote cell proliferation and osteogenic differentiation in BMSCs, and these effects are potentially achieved via upregulation of WNT5A/WNT7A/b-catenin signaling.

Medial approach to treat humeral mid-shaft fractures: a retrospective study.

BACKGROUND: Plate fixation is the gold standard for diaphyseal fracture management, and the anterolateral approach is widely used by reconstructive surgeons. However, the outcomes of humeral shaft fracture fixation using a medial approach are rarely reported. The aim of this study is to explore the management and outcomes of humeral mid-shaft fractures fixed through a medial incision. METHODS: Thirty-four patients who sustained a humeral mid-shaft fracture and underwent an open-reduction internal fixation (ORIF) in our department between January 2010 and January 2013 were included in this study. Sixteen patients had an ORIF performed through a medial approach, while the remaining 18 were fixed through an anterolateral approach. Postoperative clinical and radiographic results were reviewed. RESULTS: There were no significant differences in the blood loss and the range of motion of the shoulder and elbow between the anterolateral and medial fixation groups. One patient in the medial group and two patients in the anterolateral group had radial nerve dysfunction that improved after 8, 3 and 6 weeks, respectively. All patients healed radiographically except one from the anterolateral group who underwent grafting and re-fixation for a non-union. No vascular injuries, infections, malunions, broken plates or loose screws were noted in either group. CONCLUSIONS: The medial approach to the humerus had equivalent outcomes to anterolateral fixation. It is an available choice for humeral mid-shaft fracture fixation in cases where there is no need to expose the radial nerve. The medial approach does not require a pre-bent plate and creates a large operative exposure. A well-hidden incision can also be designed, improving cosmetic outcomes. However, the medial approach is not suitable to proximal or distal humerus fractures.

Expression of high mobility group box 1 protein predicts a poorer prognosis for patients with osteosarcoma.

The high mobility group box 1 (HMGB1) protein functions as an extracellular signaling molecule that is critical in inflammation and carcinogenesis. The HMGB1 protein is actively secreted by natural killer cells, monocytes and macrophages, and acts as an inflammatory cytokine. The present study enrolled 174 patients that underwent a tumorectomy between 2006 and 2013 in Shandong Provincial Hospital. The age of the patients ranged between 13 and 74 years, with a median age of 27 years. The tumors of the patients were staged according to the Union for International Cancer Control 2009 tumor-node-metastasis tumor staging system. Nuclear grading was based on the Fuhrman grading system. In the osteosarcoma tissue samples, HMGB1 expression was detected in 84 samples (48.3%) with a low immunoreactivity and in 90 samples (51.7%) with a high immunoreactivity. The association between clinicopathological characteristics and tumor cell HMGB1 expression (low vs. high) was summarized. The association between HMGB1 expression and tumor size, tumor stage and nuclear grade was statistically significant (P=0.034, 0.008 and 0.019, respectively). There was no significant association between HMGB1 expression and the age of the patients (P=0.335; Table I). The current study demonstrated that patients with a high HMGB1 expression (>50% cells expressing HMGB1) had poorer survival rates, and therefore a poorer prognosis, compared with patients with low HMGB1 immunostaining (10-50% cells expressing HMGB1). The results of the present study suggest that higher expression levels of HMGB1 are significantly associated with a poorer prognosis and may act as a marker for prognosis in osteosarcoma, particularly osteosarcoma recurrence. Additional studies investigating the biological features of HMGB1 may confirm the potential role of HMGB1 as a novel target for anticancer therapy in osteosarcoma.

Comparison of Isocentric C-Arm 3-Dimensional Navigation and Conventional Fluoroscopy for Percutaneous Retrograde Screwing for Anterior Column Fracture of Acetabulum: An Observational Study.

Percutaneous screw insertion for minimally displaced or reducible acetabular fracture using x-ray fluoroscopy and computer-assisted navigation system has been advocated by some authors. The purpose of this study was to compare intraoperative conditions and clinical results between isocentric C-arm 3-dimensional (Iso-C 3D) fluoroscopy and conventional fluoroscopy for percutaneous retrograde screwing of acetabular anterior column fracture.A prospective cohort study was conducted. A total of 22 patients were assigned to 2 different groups: 10 patients in the Iso-C 3D navigation group and 12 patients in the conventional group. The operative time, fluoroscopic time, time of screw insertion, blood loss, and accuracy were analyzed between the 2 groups.There were significant differences in operative time, screw insertion time, fluoroscopy time, and mean blood loss between the 2 groups. Totally 2 of 12 (16.7%) screws were misplaced in the conventional fluoroscopy group, and all 10 screws were in safe zones in the navigation group. Percutaneous screw fixation using the Iso-C 3D computer-assisted navigation system significantly reduced the intraoperative fluoroscopy time and blood loss in percutaneous screwing for acetabular anterior column fracture.The Iso-C 3D computer-assisted navigation system provided a reliable and effective method for percutaneous screw insertion in acetabular anterior column fractures compared to conventional fluoroscopy.

Retroperitoneal packing or angioembolization for haemorrhage control of pelvic fractures--Quasi-randomized clinical trial of 56 haemodynamically unstable patients with Injury Severity Score ≥33.

AIMS: Both retroperitoneal pelvic packing and primary angioembolization are widely used to control haemorrhage related to pelvic fractures. It is still unknown which protocol is the safest. The primary aim of this study is to compare survival and complications of pelvic packing and angioembolization in massive haemorrhage related to pelvic fractures. METHODS: Patients with haemodynamically unstable pelvic fractures were quasi-randomized to either pelvic packing (PACK) or angiography (ANGIO) using the time of admission as separator. Physiological markers of haemorrhage, time to intervention, procedure/surgical time, transfusion requirements, complications and early mortality were recorded and analyzed. RESULTS: 29 patients were randomized to PACK and 27 patients to ANGIO. The Injury Severity Score (ISS) in the ANGIO group was lower than in the PACK group (43 ± 7 vs 48 ± 6) (p<0.01). The median time from admission to angiography for the ANGIO group was 102 min (range 76-214), and longer than 77 min (range 43-125) from admission to surgery for the PACK group (p<0.01). The procedure time for the ANGIO group was 84 min (range 62-105); while the surgical time was 60 min (range 41-92) for the PACK group (p<0.001). The ANGIO group received 6.4 units packed red blood cells (range 4-10) in the first 24h after angiography. The PACK group required 5.2 units (range 3-10) in the first 24h after leaving the operating theatre (p=0.124). 9 patients in the ANGIO group underwent pelvic packing for persistent bleeding. 6 patients in the PACK group required pelvic angiography after pelvic packing for ongoing hypotension following packing (p=0.353). 5 patients in the ANGIO group died (2 from exsanguination), while 4 in the PACK group died (none from exsanguination) (p=0.449). Complications occurred without differences in both groups. CONCLUSIONS: Compared with angioembolization, pelvic packing has shorter time to intervention and surgical time. Thus pelvic packing is the more rapid treatment of severe pelvic trauma than pelvic angioembolization. It is suitable for patients with haemodynamic instability at centers where the interventional radiology staff is not in-house at all times. REGISTRATION: ClinicalTrials.gov (NCT02535624) and ISRCTN registry (ISRCTN91713422).

Comparison of Biomechanical Characteristics and Pelvic Ring Stability Using Different Fixation Methods to Treat Pubic Symphysis Diastasis: A Finite Element Study.

The intention of this study was to compare the biomechanical characteristics using 5 internal fixation methods used clinically to stabilize a pubic symphysis diastasis (PSD, Tile type B1).A 3-dimensional finite element model of PSD was simulated using 5 implants, including single superior plate (Single-Plate), superior and anterior plate (Dual-Plate), single cannulated screw (Single-Screw), crossed dual cannulated screws (Cross-Screw), and parallel dual cannulated screws (Para-Screw). Three loads were distributed in all models, including dual-leg standing, single-leg stance, and rotation. To evaluate the biomechanical properties, the construct stiffness, the stress distribution, and the von Misses stress were recorded and analyzed. To evaluate pelvic ring stability, the micromotion of the pubic symphysis and iliosacral joint was analyzed.Disruption of pubic symphysis dramatically decreased the pelvic ring stability. Cross-screw and Para-Screw showed higher stiffness than other methods. All implants endured the maximum von Misses stress under single-leg stance. For Plate-Screw system, the maximum stress occurred at a place where it strides over pubic symphysis and adjacent Plate-Screw interface. The single implant and Para-Screw had a tendency to fail. Para-Screw showed the best fixation effect under dual-leg conditions. Cross-screw showed superior antishearing force capacity under single-leg stance. Dual-Plate provided maximum antihorizontal rotation. Para-Screw provided the maximum stabilization for the posterior pelvic ring.This study showed the biomechanical advantages of dual-implant for PSD only from the finite element view. The Para-Screw provided high construct stiffness under 3 load conditions. The single implant and Para-Screw had a tendency to fail. The better anterior and posterior pelvic stabilization were obtained by the dual-implant fixation than other methods. Therefore, the Cross-Screw and Dual-Plate fixation methods should be preferred in the treatment of pubic symphysis from the finite element view.

Squamous cell carcinoma resulting from chronic osteomyelitis: a retrospective study of 8 cases.

BACKGROUND: Squamous cell carcinoma is a severe malignant tumor but was rare in the chronic osteomyelitis. The purpose of this study was to present the results from a retrospective study the cases of squamous cell carcinoma arising from chronic osteomyelitis. MATERIAL AND METHODS: Between 1974 and 2010, eight cases of squamous cell carcinoma after chronic osteomyelitis were treated. The patients had an average age of 55 years (range 45 to 66 years), with a male predominance (6 men and 2 woman). We analyzed the time up to cancerization, localization and histopathological types of the carcinoma, and types and results of the treatment. RESULTS: The mean delay between the initial injury and the diagnosis of malignant transformation was 28 years (range 8 to 50 years). The carcinoma resulted from tibia osteomyelitis in six cases, femur in one case and ankle in one case. The pathological examination showed two cases of a well-differentiated squamous cell carcinoma with bone invasion and six cases of invasive squamous cell carcinoma. Curative amputation was performed in all patients but one who refused. No recurrence or metastasis occurred during follow-up time. CONCLUSION: Amputation appears to be an effective treatment method in squamous carcinoma secondary to chronic osteomyelitis.