Based on the development and application of new technology,as a new interdisciplinary subject,digital orthopedics becomes an important development direction of modern medicine in the past years.Using digital orthopedics technology,such as 3D digital printing technology,mixed reality technology,provides new impetus of orthopedic surgery and indicates its great potential of precision medicine and personalized therapy for orthopedic disorders.In 2017,Hubei Branch of China Digital Orthopaedic Society of Société Internationale de Chirurgie Orthopédique et de Traumatologie (SICOT) was founded.It is an important milestone and academic event for the development of digital orthopedics in Hubei.After that,Hubei's digital orthopedics professionals have made great progress in clinical,scientific research,conference and social activities.The development of 5G technologies in China will provide more opportunities and challenges for global digital orthopedics in the near future.

Objective To optimize the processing technology of Radix Achyranthis Bidentatae prepared with salt. Methods With the amount of the oleanolic acid as the parameter,the processing technology was optimized through orthogonal exper iments design L9(34). Results The optimal processing technology of Radix Achyran this Bidentatae prepared with salt was:the thickness of the medicinal pieces be ing 5～10 mm,baking 20 min with 3.00 %salt at 100 ℃. Conclusion The chosen pr ocessing technology is reasonable.

[Objective]To introduce the surgical technique and its rationale and to evaluate the early and mid-term clinical outcome of routine core decompression and insertion of a biomaterial loaded allograft threaded cage(ATC)in the treatment of necrotic femoral head．[Methods]Seventy-six patients(78 hips)with femoral head necrosis were allocated to a program of either core decompression or core decompression and implantation of ATC．[Results]At review all patients had a minimum follow-up of 24-months(24 to 68 months)．In the control group，no significant improvement in Harris hip score(HHS)was found，and 13 of the 22 hips had deteriorated to stageⅢ．In the treatment group．the mean HHS was improved from 62．8 to 81．6．Collapse was seen in 1 hip，and this collapse Was progressive in 3 hips．[Conclusion]It，s thus evident that the technique is attractive as a salvage procedure．which shows encouraging Success rates and early clinical results.

Objective To evaluate the individualized 3D) printed drilling guide we developed and used for placement of C1/2 pedicle screws in the clinical treatment of fracture and dislocation of the atlantoaxial joint.Methods From January 2014 to June 2016,we treated a total of 17 patients with fracture and dislocation of the atlantoaxial joint.All the cervical CT data of the patients were imported into the digital orthopaedic workstation for 3D reconstruction,data modeling and 3D printing to design and manufacture individualized atlantoaxial vertebral guide templates.Intraoperatively,C1 and C2 pedicle screws were placed under the guide of individualized 3D printed drilling template.Cervical short-segment fixation and fusion were conducted for the patients.Postoperatively,regular clinical and radiographic follow-ups were carried out.Results No serious complications like injury to spinal cord and vertebral artery happened due to failed placement of C1/2 pedicle screws.The operation time ranged from 136 to 222 min (average,168.0 rmin);the intraoperative blood loss ranged from 260 to 556 mL (average,356.0 mL).The 17 patients were followed up for 6 to 36 months (average,13.5 months).The patients obtained bony union after 4 to 6 months (average,4.8 months).At the final follow-up,according to ASIA92 scoring system,the average sensory score was improved significantly from preoperative 7.4 + 3.2 to postoperative 13.1 + 5.9,and the average motor score was improved significantly from preoperative 5.3 + 3.1 to postoperative 11.7 + 5.1 (P ＜ 0.05).No such complications as infection or implant failure occurred after operation.Conclusion Individualized 3D printed drilling guide for implantation of atlantoaxial pedicle screws can make the complicate and risky placement become accurate,safe and simple.

Objective To investigate the clinical efficacy of bone filling mesh bag combined with pedicle anchoring for the treatment of Stage Ⅲ reducible Kummell disease.Method The 35 paients with Stage Ⅲ reducible Kummell disease were treated with bone filling mesh bag combined with pedicle anchoring from January 2018 to December 2022.The operation Time,intraoperative blood lose,bone cement injection volume and surgical complications were recorded.The VAS score,ODI value,kyphosis Cobb angle and midline height of the injured vertebral were compared at preoperative,postoperative 1 day and last follow-up.Results All patients were followed up for 12-24 months[(15±3.5)months].Operation time was 35-63 min[(45±5.8)min],intraoperative blood loss was 10-35 ml[(20±5)ml],bone cement injection volume was 4.5-7.8 ml[(5.5±1.8)ml].There were 4 cases of bone cement leakage,there were 1 case of intervertebral leakage,2 cases of lateral leakage,1 case of anterior leakage and no patient with intracanal leakage.All bone cement leakage did not lead to clinical symptoms,bone cement poisoning and pulmonary embolism.No cement mass slip.All patients were followed up for 12 to 24 months[(15±3.5)months].VAS scores and Oswestry Disability Index(ODI)values were significantly lower on the first day after surgery than before surgery,with statistical significance(P＜0.05).The 3-month follow-up was slightly higher than that on the first day after surgery,and the difference was not statistically significant(P＞0.05).The midline height and Cobb Angle of the injured vertebra were measured by imaging.The height of the injured vertebra recovered significantly on the first day after operation,and the Cobb Angle decreased significantly,the difference was statistically significant(P＜0.05).The midline height of the injured vertebrae decreased and the Cobb Angle increased slightly at 3 months after the operation,but the difference was not statistically significant(P＞0.05).Conclusion In the the treatment of Stage Ⅲ reducible Kummell disease,Bone filling mesh bag combined with Pedicle anchoring have good clinical efficacy,which can significantly reduce the pain of patients,relieve clinical symptoms,improve spinal function,improve quality of life,and reduce the incidence of bone cement leakage and slippage.

OBJECTIVETo investigate the differences in free influenza vaccination rate among different family structures of the elderly population in Beijing under the free vaccination policy.

METHODSA cross sectional study was conducted by a multi-stage cluster sampling from July to August in 2013. A total of 1 717 individuals were selected to answer a self-designed questionnaire of demographic characteristics and basic information about receiving free influenza vaccination and 1 637 of which were valid. The chi-square test for dichotomous variables was calculated to examine the relationship between vaccine status and family characteristics. Predictor variables were selected as variables for non-conditional logistic regression model to determine potential independent predictors of vaccine uptake.

RESULTSThe free influenza vaccination rate in elderly population was 38.8% (634/1 637) in 2013. The rate in the old people who lived alone was the highest which was 47.5% (58/122). The rate in the old people who lived with children and spouse was 34.6% (175/506). There was a significant difference in coverage rate among different family structures (χ(2)=11.57, P=0.009). The rate in the old people who lived with spouse only, lived with children only and other types were 41.5% (322/778) , 34.7% (69/201), and 33.3% (10/30), respectively. In a multi-factor model, there was a significant difference in vaccination rate among different family structures after other confounding factors were controlled. The odds ratios (95% CI) of the people living with spouse only, people living with children only and people living with spouse and children were 0.90 (0.60-1.33) , 0.59 (0.37-0.96) , and 0.63 (0.42-0.96), respectively.

CONCLUSIONThe vaccination rate in the old people living alone was low. The health education should be conducted not only in the elderly people but also in their family members.

Aged ; Beijing ; Child ; Cross-Sectional Studies ; Family Characteristics ; Health Education ; Humans ; Influenza Vaccines ; administration & dosage ; Logistic Models ; Spouses ; Surveys and Questionnaires ; Vaccination ; statistics & numerical data

Objective To analyze the imported measles cases who came to Beijing seeking for better medical services and to explore the feasible strategies for prevention and control of the situation.Methods Descriptive analysis was conducted for all the measles cases noted from the Measles Surveillance System,between January 1,2014 and December 31,2014.Results 3 328 measles cases were reported in Beijing,including 2 397 (2 397/3 328,72.0％) native residents and 931 (931/3 328,28.0％) came from other provinces.Peak of the imported cases appeared earlier than those native cases,with 934 cases (934/2 397,39.0％) having had hospital exposure 7-21 days prior to the onset of the disease.Majority of the imported were children,including 718 of them (718/931,77.1％) under the age of 15.Most cases were reported from 3 infectious disease hospitals (567/1 156 person-time,49.0％) and 2 children' s hospitals (445/1 156 person-time,38.5％).Original addresses of the imported cases distributed in 24 provinces,with 705 of them (705/931,75.7％) coming from Beijing' s neighboring province (Hebei).Clinic symptoms with epidemiological information were analyzed on 712 cases.704 cases (704/712,98.9％) presented rash at home town while another 621 cases(621/712,87.2％) developed rash 4 days after arriving in Beijing and were still in the infectious period.Conclusion There was a big amount of imported measles cases in Beijing that called for the elimination of the disease in a urgent phase.It is necessary to timely develop and conduct targeted prevention and control measures on the disease in Beijing.

Objective To investigate the clinical efficacy of modified open-door laminoplasty with preservation ofthe unilateral paraspinal muscle ligament complex in treating ossification of posterior longitudinal ligament (OPLL) of the cervical spine.Methods From June 2015 to July 2017,thirty-two patients with OPLL of the cervical spine who underwent modified open-door laminoplasty with preservation of the unilateral paraspinal muscle ligament complex were retrospectively analyzed(modified group).There were 20 males and 12 females with the average age of 61.72±8.41 years (range 46-75 years).The decompression segment range included three cases of C2-C6,seven cases of C2-C7,eight cases of C3-C6,and fourteen cases of C3-C7.Moreover,twenty-three patients with OPLL of the cervical spine who underwent traditional unilateral open-door laminoplasty at the same time were included as controls (control group).The demographics,operation duration,and blood loss volume was recorded.The visual analogue scale (VAS),Japanese Orthopaedic Association scores (JOA),improvement rate of JOA score and neck disability index (NDI) were recorded and analyzed at preoperation,three months after operation,six months after operation and at the final follow-up.The cervical curvature,cervical curvature index (CCI),range of motion (ROM) were measured and statistically analyzed on the lateral X-ray film of the cervical spine.The union rate of the lamina hinge and that of spinous process-lamina was measured on the cross section of the CT scan.Bilateral cervical posterior muscle volume was recorded and analyzed at cross-section plane on MRI.Axial symptoms,C5 nerve root palsy and other complications were also recorded.Results All the patients were followed-up for 6 to 18 months (mean,13.04±4.67 months in control group,11.81±4.93 months in modified group).At the final follow-up,the JOA,VAS and NDI scores improved from preoperatively 6.09±0.79 to 13.43± 1.53,4.22±1.04 to 2.83±1.15 and 25.48％±3.20％ to 8.83％±5.41％ in the control group,versus 6.28±1.05 to 13.88±1.48,4.09± 1.00 to 1.16±0.57 and 25.06％±3.24％ to 5.66％±2.46％ in the modified group.The postoperative JOA score and recovery rate of the two groups was not significantly different,whereas the VAS and NDI scores were significantly reduced in the modified group compared to the control group.The maximum cervical flexion angle,cervical curvature,ROM and CCI of control group were 6.26°± 3.31°,30.17°±4.56°,11.39°±1.95° and 9.74％±4.05％ at the final follow-up,which were reduced significantly compared to pre-operation.The maximum cervical flexion angle,cervical curvature,ROM and CCI of modified group were 10.06°± 1.93°,35.03°± 5.01°,17.03°±2.86° and 14.22％±5.00％,and there were no significant differences compared to pre-operation.There were significant differences among two groups.At the final follow-up,the posterior muscle volume of the two groups at open side was decreased compared to preoperation,but there was no significant difference between the two groups.At the last follow-up,the posterior muscle volume at hinge side was not changed compared to preoperation in modified open-door laminoplasty group,while the volume of the posterior muscle at hinge side in the traditional control group decreased compared to preoperation.The difference was statistically significant.A total of eight patients with axial symptom were present after operation.There were two patients (6％,2/ 32) in the modified group and six patients (26％,6/23) in the control group.The difference of axial symptoms incidence was statistically significant between the two groups.Conclusion Modified open-door laminoplasty with preservation of the unilateral paraspinal muscle ligament complex is an effective technique in treating OPLL of the cervical spine.The technique not only guaranteed to have good recovery of neurological function and to maintain cervical curvature and range of motion,but also contributed to decrease the occurrence of postoperative axial symptoms.

OBJECTIVETo analyze the polio immunity level of persistent population in Beijing, 2012.

METHODSA total of 1 676 subjects residing more than 6 months in Beijing were selected by stratified random cluster sampling design in 2012. Demographic characteristics, history of oral poliovirus vaccine (OPV) immunization were investigated by questionnaire. All 5 ml blood sample were collected for testing of polio neutralizing antibody using the method of microcell neutralization. The positive rate and the geometric mean titer (GMT) of polio neutralizing antibody type I, II and III were analyzed in different groups.

RESULTSThe positive rate of type I, II and III were 98.2% (1 645/1 676), 98.1% (1 644/1 676), 97.6% (1 635/1 676); The GMT were 1:130.2, 1: 113.4 and 1: 79.7. Three types of positive rates in<15 years group (99.7% (664/666), 99.8% (665/666), 99.5% (663/666)) were higher than those of ≥ 15 years group (97.1% (981/1 010), 96.9% (979/1 010), 96.2% (972/1 010)), the differences were significant (all the values of P < 0.01); The GMT in<15 years group (1:325.9, 1:250.5, 1:190.7) were higher than that of ≥ 15 years group (1: 71.1, 1: 67.2, 1: 44.8), the difference was significant (all the values of P < 0.01). The positive rate (99.0%-100%) and GMT (1: 128.8-1: 300.7) in vaccination information confirmed population were higher. The highest positive rate (all were 100%) and GMT(1: 409.7-1: 636.7) were observed in children who vaccinated three times.

CONCLUSIONThe polio antibody of healthy population was at a high level in Beijing in 2012; Especially the age groups of < 15 years which were covered by vaccines.Immunization barrier had been formed firmly to interrupt the transmission of wild poliovirus and vaccine-derived poliovirus.

Adaptive Immunity ; Adolescent ; Antibodies, Neutralizing ; Antibodies, Viral ; Child ; Humans ; Poliomyelitis ; Poliovirus ; Poliovirus Vaccine, Oral ; Vaccination ; statistics & numerical data

Objective: To investigate the source and the transmission chain of a cold-chain product associated COVID-19 epidemic caused by 2019-nCoV Delta variant in Beijing. Methods: Epidemiological investigation were used to verify the exposure points of the cases. Close contacts were traced from the exposure points, and human and environmental samples were collected for nucleic acid tests. Positive samples were analyzed by gene sequencing. Results: A total of 112 cases of COVID-19 were reported in the epidemic from January 18 to February 6, 2022 in Beijing. Except for 1 case was uncertain, there were epidemiological links among 111 cases. The source of infection was the packages of imported cold-chain products from Southeast Asia, which were harvested and stored in a local cold-storage in January 2021, and packaged and sent to the cold-storage A in A district in June 2021, and then sold in batches in cold-storage B in B district from January 2022. The first case was infected in the handling of positive frozen products, and then 77 cases occurred due to working, eating and living together with the index case in the cold-storage B, cold-storage C and restaurant D. Besides the cold-storage B, C and the restaurant D, there were 16 sub-transmission chains, resulting in additional 35 cases. Conclusion: The epidemic indicated that the risk of 2019-nCoV infection from imported cold-chain products contaminated by package and highlighted the importance to strengthen the management of cold-chain industry in future.
Beijing/epidemiology* ; COVID-19/epidemiology* ; Epidemics ; Humans ; SARS-CoV-2