Objective To summarize the clinical experience of treating long bone defect with vascularized fibular graft.Methods From January,2008 to January,2015,31 cases of long bone defect were treated with vascularized fibula composite or not composite tissue flap graft.The length of transplanted fibula was 9-20 cm,and the flap area was 5 cm×3 cm to 21 cm×14 cm.All patients were followed up regularly.Limb function was assessed 12 months after surgery.Results Thirty-one cases of vascularized fibular flap survived after surgery.Thirty patients were followed up for 1.5 to 6 years (average,2.5 years).One patient was lost to follow-up.The bone defects of patients followed up were healed.There was one case fracture occurred for trauma,was treated with plaster cast for 6 months and healed.The transplanted fibular thickened for 1.3 to 2.5 years(average,1.6 years).Conclusion Vascularized fibular graft can reconstruct long bone defect for single use and shorten the duration of treatment with a good limb function.For cases combined soft tissue defect,vascularized fibula composite tissue flap can be applied to repair at the meantime.

Objective: To report our experience in the prevention and control of COVID-19 in the tramatological and microsurgical wards. Methods: A retrospective study was conducted of the COVID-19 infections in the 51 medical staff and patients from 31 December, 2019 to 14 February, 2020 at Department of Traumatology and Microsurgery, Zhongnan Hospital. The prevention and control measures were upgraded after 20 January, 2020 to address the serious epidemic situation, including preventive disinfection, terminal disinfection and personnel disinfection in wards, management of emergency patients, inpatients and patients suspected of COVID-19 infection, and training, management and psychological intervention of medical staff. The outcomes resulting from different prevention and control measures before and after 20 January, 2020 were compared. Results: From 31 December, 2019 to 20 January, 2020, there were altogether 3 cases of definite COVID-19 infection and 2 ones of suspected COVID-19 infection at the department. One doctor, one technician and one nurse were diagnosed as definite COVID-19 infection while one nurse and one patient as suspected COVID-19 infection. The 4 medical staff members infected were cured and discharged before 14 February, 2020 but unfortunately the one patient infected died. After the prevention and control measures for COVID-19 infection had been upgraded since 20 January, 2020, 12 out of the 29 emergency patients at our wards had fever (body temperature ≥37.3℃) but none COVID-19 infection. All the 47 medical staff on duty at the department got trained and none of them was infected by COVID-19 or suffered from mental disorder. Conclusion In the epidemic of COVID-19, as our prevention and control measures for COVID-19 infection were adjusted and upgraded in response to the changing epidemic situation, they eliminated nosocomial infection scientifically and effectively and ensured life safety of the medical staff and patients at the department.

Objective:To evaluate the therapeutic effect of exposed bone cement in treatment of infectious bone and soft tissue defect by comparison with routine bone cement therapy.Methods:A retrospective analysis was carried out in 27 patients who had been treated from January 2016 to January 2020. Of the 27 patients, 12 were treated by exposed bone cement filling for bone defect at the first stage, followed by flap and bone grafting at the second stage. Other 15 patients were treated by routine bone cement filling and flap repair at the first stage, followed by bone grafting at the second stage. Regular dressing change was carried out after surgery. All patients entered follow-up by out-patient review for wound condition and X-ray. Infection rate of bone and soft tissue, time of bone union, flap survive rate and complication were compared between the 2 groups.Results:The follow-up lased for 9-24(16.5±3.9 ) months. The bone defects were all healed. The treatment time of bone defects in the group of exposed bone cement was 25-34(28.5±2.8) weeks. The treatment time of bone defect in the routine cement group was 25-36(29.6±3.4 )weeks. There was no statistical difference between the 2 groups( P<0.05). Two cases in each group had failed in infection control after bone cement implantation. With further debridement, cleaning and other treatment, the infection was under control. All flaps in the 2 groups survived. In the group of exposed bone cement, there were 3 flaps splitting, 2 hemorrhage(effusion) and 1 partial flap necrosis, In the routine bone cement group, there were 4 wound dehiscence, 8 hemorrhage(effusion) and 3 partial flaps necrosis. There was no significant difference in flap complications between the 2 groups( P>0.05). The healing of bone defect was evaluated by Samantha X-ray score, the scores of the 2 groups were 5.41±0.67 and 5.40±0.63, respectively, with no statistical significance. The Paley's approach was used to grade the bone healing and the function of adjacent joints. Paley bone defect healing evaluation results weve all excellent. Joint function assessment were as follow: in the group of exposed bone cement, 6 cases were excellent and 3 were good; in routine bone cement group: 6 cases were in excellent and 5 in good. There was no significant statistical difference. Conclusion:Compared with a routine bone cement treatment, the exposed bone cement in the treatment of infectious bone defects saw a fewer flap splitting and fewer hemorrhage/effusion, without an increase in bone and soft tissue infection. This procedure could be considered for further trials in the treatment of a composite defects of infected bone and soft tissue.

Objective:To access the efficacy of external fixation combined with Prontosan management for open fractures complicated with multidrug-resistant bacterial infection.Methods:A retrospective analysis was conducted of the data of 22 patients with open fracture complicated by multidrug-resistant bacterial infection who had been admitted to Department of Orthopedic Trauma and Microsurgery, Zhongnan Hospital of Wuhan University from January 2015 to January 2020. According to whether the Prontosan management was used or not, the patients were divided into 2 groups.The Protosan group [9 males and 3 females with an age of (44.6±13.1) years] were subjected to external fixation, vacuum sealing drainage(VSD) or conventional dressing changes, and at the same time Protosan management to flush the wound or Prontosan gel to change dressings.The control group[6 males and 4 females with an age of (45.1±11.7) years] were subjected to external fixation plus VSD or conventional dressing changes. Skin flaps or skin grafts were used to repair the wound immediately after the wound infection was controlled in both groups. The time for negative culture of the bacteria on the wound surface, number of debridement, survival of the skinflaps or grafts, and fracture union were recorded and compared between the 2 groups.Results:There was no significant difference in the preoperative general data between the 2 groups which were comparable( P>0.05).All patients were followed up for 10 to 24 months (mean, 14.5 months).In the Prontosan group, the number of debridement was 2.0 (2.0, 3.0) times, significantly fewer than that in the control group [4.0 (3.0, 4.0) times]; the time for negative bacterial culture (8.3±2.2) d, significantly shorter than that in the control group [(14.2±3.1) d]; the fracture union time (5.5±1.1) months, significantly shorter than that in the control group [(6.5 ±1.1) months]; the Samantha X-ray score at 6 months after operation 6.0 (5.0,6.0) points, significantly higher than that in the control group [5.2(4.5,5.5) points] (all P<0.05). Skin flaps or grafts survived in all the patients without any nonunion or chronic osteomyelitis. Conclusion:In the external fixation of open fractures complicated with multidrug-resistant bacterial infection, combination with Prontosan management can effectively control infection and promote granulation, early wound healing and fracture union.

To summarize the application of enhanced recovery after surgery (ERAS) principles in treating long bone defect with free fibula graft (FVFG). Methods From January, 2012 to January, 2017, ERAS principles were applied in 26 cases of long bone defect treating with vascularized fibula flap graft, via a series of com-prehensive measures, including strengthening psychological nursing, nutrition support and pain management, optimiz-ing operation plan, and early scientific functional exercise. Surgical duration, hospital stay time, satisfaction of pa-tients, postoperative visual analogue scale (VAS) score, bone defect healing time, and Enneking score were recorded through regular outpatient follow-up after discharge. Results The average length of surgical duration and hospital stay time was(3.2±0.5) h and (10.2±1.2) d, respectively. Discharged satisfaction was greater than 95%. Postoperative VAS score was less than 3. During the follow-up period of 1.6-6.0 years, 26 fibular flap survived, and all the bone defect were healed, with an average healing time of (5.5±0.6) months.Followed-up at 1.5 years after the operation, the upper limb function of 7 patients increased by 80.1%, and the lower limb function of 19 patients increased by 82.5%. Conclusion The application of ERAS in treating long bone defect with FVFG can obtain satisfactory limb function, alleviate patients’pain, shorten the duration of hospitalization, promote the rehabilitation and satisfaction of patients.

Objective To compare internal fixation with hallow compression screws combined vascularized bone graft(observation group) with only three hallow compression screws(control group) in young patients' Garden III and IV femoral neck fractures. Methods The patients with femoral neck fracture were treated from January, 2004 to December, 2013 were retrospectively reviewed. A total of 417 displaced femoral neck fractures in young and mid-dle-aged patients were long term followed-up. One hundred and thirty-seven patients were underwent open reduction and internal fixation with 3 hallow compression screws combined with a greater trochanter bone graft supported by the profound branch of medial circumflex femoral artery;280 patients were treated by closed reduction with 3 hallow com-pression screws. Results Patients had been followed-up for 5-12 years. At the last follow-up point, the Harris score of flap in observation group(93.68±5.12) were higher than that in control group(92.53±6.12), while it was no sta-tistical difference(P>0.05). It was 0.7％of nonunion incidence rate in the observation group, and incidence of avascular necrosis of femoral head was 6.6％, and incidence of femoral neck shortening was 8.8％. In the control group, inci-dence of avascular necrosis of femoral head was 14.6％, nonunion incidence rate was 4.6％, and incidence of femoral neck shortening was 22.5％. The differences between two groups was statistically significance( P<0.05). Conclusion The open reduction and internal fixation which is hallow compression screws in combination with a greater trochanter bone graft supported by the profound branch of medial circumflex femoral artery is an optimal treatment for young adults with Garden III and IV femoral neck fractures.

Objective:To summarize the preliminary experience in ward management, medical protection, standardised diagnosis and treatment procedures in trauma microsurgery during the outbreak of COVID-19.Methods:Taking an example from the Department of Trauma and Microsurgery at Zhongnan Hospital of Wuhan University, the orthopedic patients and medical staff with COVID-19 admitted from Decemberm 31, 2019 to March 1, 2020, in-cluding clinical diagnosis and confirmed cases, were analyzed retrospectively. General information, including age, gen- der, basic diseases, contact history, symptoms, lung CT and prognosis, were collected and analysed preliminarily. On January 20, 2020, the COVID-19 outbreak was confirmed as "human to human transmission". COVID-19 infection of patients and medical staff in the wards were analysed, through the update of protection awareness and control measures. Department management, medical protection and standardized control procedures of trauma microsurgery were explored.Results:Five cases with clinical diagnosis or confirmed COVID-19 were included. One was inpatient and the rest 4 were medical staff, aged 25-81 years, 3 with confirmed and 2 with clinical diagnosis of COVID-19. After the treatment by specialists from Department of Infectious Disease and Department of Respiratory Disease, 4 of infected persons were cured and 1 died. Since January 20, 2020, when it was clear that the virus transmitted to people, there was no new case of infection among the medical staff and inpatients after the multidisciplinary collaboration in the ward prevention and control procedures were standardized and took in action.Conclusion:The spread of the COVID-19 can be effectively controlled by standardised diagnosis and treatment procedurs in the word of trauma microsurgery.

BACKGROUND:The impact of anterior cervical surgery on the sagittal balance parameters of the cervical spine is gradually being paid attention to.Currently,there is a lack of clear and feasible clinical guidelines for the selection of surgical methods for two-level cervical spondylosis,aiming to find the most suitable fixation method that is more beneficial for this type of patient. OBJECTIVE:To compare the effects of different fusion devices for anterior cervical decompression on the changes of cervical sagittal parameters after surgery for adjacent two-level cervical spondylotic myelopathy. METHODS:A total of 44 patients with adjacent two-level cervical spondylotic myelopathy underwent anterior cervical discectomy and fusion from March 2018 to September 2020 in Liaocheng People's Hospital were retrospectively analyzed in the study,and they were divided into zero-p group(23 cases)and cage group(21 cases).All patients underwent anteroposterior X-ray,three-dimensional CT reconstruction and MRI examination before operation.At the last follow-up,the anteroposterior X-ray films of cervical spine were taken.The sagittal balance parameters of the cervical spine were measured before and after surgery,including cervical lordotic angle(C2-7 Cobb),C2-C7 sagittal vertical axis,segmented lordotic angle and T1 slope.The surgical time,intraoperative bleeding,last follow-up intervertebral fusion,and postoperative swallowing disorders were recorded,and Japanese Orthopaedic Association score on the patient was evaluated before and after surgery.The changes in cervical sagittal parameters before and after surgery were calculated and their differences were compared between the two groups. RESULTS AND CONCLUSION:(1)Both groups of patients successfully completed the surgery and received follow-up.The zero-p group had shorter surgical time and less intraoperative bleeding compared to the cage group,but the difference was not statistically significant(P>0.05).(2)The incidence rate of postoperative swallowing disorders in the cage group(7/21,33%)was higher than that in the zero-p group(3/23,13%),and the difference was statistically significant(P<0.05).(3)At the last follow-up,the clinical efficacy of the two groups was the same;all patients had bone fusion.Comparison within the group showed that the sagittal parameters of the cervical spine in both groups improved compared to before surgery(P<0.05).There was no statistically significant difference in sagittal parameters between groups(P>0.05),and there was no statistically significant difference in changes in C2-C7 sagittal vertical axis,C2-7 Cobb angle,and T1 slope between the two groups(P>0.05).However,the segmented lordotic angle changes in the zero-p group were smaller than those in the cage group,and the difference was statistically significant(P<0.05).(4)It is indicated that the use of zero-p and titanium plate combined with cage during anterior cervical discectomy and fusion surgery can effectively improve cervical sagittal balance.Titanium plate combined with cage intervertebral fusion can better reconstruct the patient's cervical lordosis and curvature.The selection of fusion devices should also comprehensively consider the occurrence of surgical complications.

As one of the key enzymes in cell metabolism, the activity of citrate synthase 3 (CS3) regulates the substance and energy metabolism of organisms. The protein members of CS3 family were identified from the whole genome of apple, and bioinformatics analysis was performed and expression patterns were analyzed to provide a theoretical basis for studying the potential function of CS3 gene in apple. BLASTp was used to identify members of the apple CS3 family based on the GDR database, and the basic information of CS3 protein sequence, subcellular localization, domain composition, phylogenetic relationship and chromosome localization were analyzed by Pfam, SMART, MEGA5.0, clustalx.exe, ExPASy Proteomics Server, MEGAX, SOPMA, MEME, WoLF PSORT and other software. The tissue expression and inducible expression characteristics of 6 CS3 genes in apple were determined by acid content and real-time fluorescence quantitative polymerase chain reaction (qRT-PCR). Apple CS3 gene family contains 6 members, and these CS3 proteins contain 473-608 amino acid residues, with isoelectric point distribution between 7.21 and 8.82. Subcellular localization results showed that CS3 protein was located in mitochondria and chloroplasts, respectively. Phylogenetic analysis divided them into 3 categories, and the number of genes in each subfamily was 2. Chromosome localization analysis showed that CS3 gene was distributed on different chromosomes of apple. The secondary structure of protein is mainly α-helix, followed by random curling, and the proportion of β-angle is the smallest. The 6 members were all expressed in different apple tissues. The overall expression trend from high to low was the highest relative expression content of MdCS3.4, followed by MdCS3.6, and the relative expression level of other members was in the order of MdCS3.3 > MdCS3.2 > MdCS3.1 > MdCS3.5. qRT-PCR results showed that MdCS3.1 and MdCS3.3 genes had the highest relative expression in the pulp of 'Chengji No. 1' with low acid content, and MdCS3.2 and MdCS3.3 genes in the pulp of 'Asda' with higher acid content had the highest relative expression. Therefore, in this study, the relative expression of CS3 gene in apple cultivars with different acid content in different apple varieties was detected, and its role in apple fruit acid synthesis was analyzed. The experimental results showed that the relative expression of CS3 gene in different apple varieties was different, which provided a reference for the subsequent study of the quality formation mechanism of apple.
Citric Acid ; Malus/genetics* ; Citrate (si)-Synthase ; Phylogeny ; Citrates

Pyruvate dehydrogenase E1 component subunit beta-1 (PDHB-1) is a gene encoding the β-subunit of pyruvate dehydrogenase complex, which plays an important role in fruit acid accumulation. The aim of this study was to investigate the evolution characteristics of apple PDHB-1 family and its expression in apples with different acid contents. Bioinformatics analysis was performed using databases including NCBI, Pfam and software including ClustalX, MEGA, and TBtools. By combining titratable acid content determination and quantitative real-time PCR (qRT-PCR), the expression of this family genes in the peel and pulp of apple 'Asda' and 'Chengji No.1' with different acid content were obtained, respectively. The family members were mainly located in chloroplast, cytoplasm and mitochondria. α-helix and random coil were the main factors for the formation of secondary structure in this family. Tissue-specific expression profiles showed that the expression of most members were higher in fruit than in other tissues. qRT-PCR results showed that the expression profile of most members was consistent with the profile of titratable acid contents. In the peel, the expression levels of 14 members in 'Asda' apples with high acid content were significantly higher than that in 'Chengji No.1' apples with low acid content, where the expression difference of MdPDHB1-15 was the most significant. In the pulp, the expression levels of 17 members in 'Asda' apples were significantly higher than that in 'Chengji No.1' apples, where MdPDHB1-01 was the most highly expressed. It was predicted that PDHB-1 gene family in apple plays an important role in the regulation of fruit acidity.
Malus/metabolism* ; Fruit/genetics* ; Protein Structure, Secondary