Objective To explore the therapeutic effect of orthopedic robot assisted percutaneous cannulated screw internal fixation in the treatment of Tilt pelvic fractures.Methods A retrospective analysis was made on clinical data of 21 cases of Tilt pelvic fractures treated with"Tianji"orthopedic surgical robot combined with 3D C-arm fluoroscopy assisted percutaneous cannulated screw internal fixation from January 2020 to October 2023.The Tile classification included 11 cases of type B2.1,3 cases of type B2.2,2 cases of type B2.3,and 5 cases of type B3.Results The percutaneous insertion of cannulated screw was safe in all the 21 cases,with a total of 71 screws inserted,including 21 S1 screws,21 S2 screws,21 pubic branch screws(14 anterograde screws and 7 retrograde screws),4 LC-Ⅱ screws,and 4 modified LC-Ⅱ screws.The insertion time of a single screw was(31.1±10.8)min,the fluoroscopy time of a single screw was(5.9±1.7)min,the surgical time was(100.7±16.2)min,and the bleeding volume was(11.2±4.2)ml.According to the Matta criteria,8 cases had excellent fracture reduction quality,11 cases were good,and 2 cases were fair,with an excellent and good rate of 90.5％(19/21).According to the Gras classification,the quality of screw placement was excellent in 65 cases and good in 6 cases,with an excellent and good rate of 100％(71/71).The 21 cases were followed up for 4-18(mean,10.7±8.4)months.The bone healing was achieved in all the cases,with a fracture healing time of(12.7±1.8)weeks.At the last follow-up,according to the Majeed scoring system,7 cases were rated as excellent pelvic function,11 cases as good,and 3 cases as fair,with an excellent and good rate of 85.7％(18/21).Two cases of lateral femoral cutaneous nerve injury and two cases of intermuscular vein thrombosis were cured.Conclusion The use of orthopedic robot assisted percutaneous cannulated screw fixation for the treatment of Tilt pelvic fractures has satisfactory therapeutic effects,with accurate screw placement and no need for adjustment.

Objective To explore the therapeutic effect of orthopedic robot assisted percutaneous cannulated screw internal fixation in the treatment of Tilt pelvic fractures.Methods A retrospective analysis was made on clinical data of 21 cases of Tilt pelvic fractures treated with"Tianji"orthopedic surgical robot combined with 3D C-arm fluoroscopy assisted percutaneous cannulated screw internal fixation from January 2020 to October 2023.The Tile classification included 11 cases of type B2.1,3 cases of type B2.2,2 cases of type B2.3,and 5 cases of type B3.Results The percutaneous insertion of cannulated screw was safe in all the 21 cases,with a total of 71 screws inserted,including 21 S1 screws,21 S2 screws,21 pubic branch screws(14 anterograde screws and 7 retrograde screws),4 LC-Ⅱ screws,and 4 modified LC-Ⅱ screws.The insertion time of a single screw was(31.1±10.8)min,the fluoroscopy time of a single screw was(5.9±1.7)min,the surgical time was(100.7±16.2)min,and the bleeding volume was(11.2±4.2)ml.According to the Matta criteria,8 cases had excellent fracture reduction quality,11 cases were good,and 2 cases were fair,with an excellent and good rate of 90.5％(19/21).According to the Gras classification,the quality of screw placement was excellent in 65 cases and good in 6 cases,with an excellent and good rate of 100％(71/71).The 21 cases were followed up for 4-18(mean,10.7±8.4)months.The bone healing was achieved in all the cases,with a fracture healing time of(12.7±1.8)weeks.At the last follow-up,according to the Majeed scoring system,7 cases were rated as excellent pelvic function,11 cases as good,and 3 cases as fair,with an excellent and good rate of 85.7％(18/21).Two cases of lateral femoral cutaneous nerve injury and two cases of intermuscular vein thrombosis were cured.Conclusion The use of orthopedic robot assisted percutaneous cannulated screw fixation for the treatment of Tilt pelvic fractures has satisfactory therapeutic effects,with accurate screw placement and no need for adjustment.

Bone age, the most commonly used and effective indicator for understanding children's growth and development, plays an important role in the diagnosis and efficacy evaluation of various growth and development disorders. Clinically, X-rays of the left hand and wrist are mostly taken for bone age assessment, but there is a certain radiation risk. Ultrasound can clearly display the epiphysis and secondary ossification center, and conveniently perform multi-site scanning and dynamic measurement without radiation. In recent years, great progress has been made in the research and clinical application of ultrasound in bone age assessment. This article, by reviewing the latest literature, discusses the value of musculoskeletal ultrasound and quantitative ultrasound in bone age assessment, raises the problems in the study of ultrasound assessment of bone age, and suggests direction for improvement.

Preliminary exploration of using ultrasound to quantitatively evaluate the development of epiphyseal cartilage and analyze its correlation with bone age, based on the ultrasound findings of the long bone joint end.

To research on area ossification ratio (AOR), a novel parameter for quantitatively assessing adolescent bone age by conventional ultrasonography, and evaluate the correlation between AOR and radiographic bone age.

To evaluate the correlation between ultrasound ossification ratio(OR) and exercise intensity among adolescents.

Different degrees of visual function impairment is the main reason for first visit of children with optic pathway glioma; it seriously affects the quality of life of children. Early diagnosis, timely treatment, maximum preservation or restoration of the children's vision function, and improvement of quality of life of children are major challenges. This article reviews the recent advance in visual function assessments for children with optic pathway glioma, aiming to provide some references for early clinical objective assessment of visual function impairment and clear diagnosis.

Objective: To propose the concept of a novel regional control and prevention (RCP) system for the outbreak of COVID-19 infectious disease, design an emergency epidemic prevention information system based on the existing network architecture and information system in the region, and a remote intelligent medical consultation and remote office platform, research and develop the technology of risk assessment and early warning for people in the region, and improve the regions’prevention and control ability facing emergency of major infectious diseases. Methods: Taking colleges, affiliated (teaching) hospitals, and cloud applications as typical RCP regional units, the existing local area network interaction methods between the cloud and universities and affiliated (teaching) hospitals are established to realize remote work in the network environment, remote medical imaging, psychological and ethical consultation and interaction; applying multi-agent propagation model based on complex network, combining Global Positioning System (GPS), Radio Frequency Identification (RFID), and electronic fence technology, to realize the risk classification and early warning of units and personnel in the area. Results: In the RCP, a system architecture combining campus network, affiliated (teaching) hospital intranet, and the Internet is used. Dynamic connection is made using distributed technology and cloud storage. The data buffer mechanism of the intermediary database in the network realized telemedicine consultation and telecommuting. Relying on the platform, multi-agent propagation model based on complex network and cellular automaton model are used to realize the score and early warning of population exposure risk in the region by using GPS, RFID and electronic fence technology. Conclusions In the epidemic phase of major infectious diseases, the construction of RCP can improve the response speed of wartime epidemic prevention, provide reasonable data-based warnings and risk ratings, and reduce the exposure risk of susceptible people. The design and development of RCP is a systematic project that needs to combine regional structural and functional characteristics, and the foundation of the early informatization work in the region and the level of the emergency development team determine the development progress, maintenance, and actual application effects. It is recommended to establish a peacetime and wartime combined RCP mode and incorporate it into the government's disease control system to improve the national and regional level of prevention and control of major infectious diseases.

Objective To evaluate the quality of different parts of agarwood formed by stimulation with biological induction method, thus to provide evidence for agarwood quality control. Methods The identification of agarwood and the determination of alcohol extracts from agarwood were achieved by the methods of Chinese Pharmacopeia. The determination of total chromones from agarwood was achieved by ultraviolet spectrophotometry(UVS), with aquilarone E as reference substance and 760 nm as the detective wavelength. Results The UVS method was stable within 5 h and the recovery rate was 95.71%(sR=2.09%). The average alcohol extract content of the outside part of the xylem of Aquilaria sinensis(Lour.) Gilg(part B) was 109.4 mg/g,which was higher than that (100 mg/g) of the Chinese Pharmacopoeia standard. The average content of total chromones was 15.73 mg/g. The rest identification results were accorded with the requirements of Chinese Pharmacopeia. The average alcohol extract content of the inside part of the xylem(part Z) was 47.6 mg/g, and the average content of total chromones was 2.66 mg/g. The rest identification results did not reach the requirements of Chinese Pharmacopeia. Conclusion The obtained part B of the agarwood meets the requirements of Chinese Pharmacopeia, while part Z has color changed and its quality has not yet reached the requirements. The results indicated that the biological induction method impacts Aquilaria sinensis xylem from outside to inside, and then the xylem grows into agarwood gradually.

Objective To establish a method for fingerprint analysis of amino acids from honey by high performance liquid chromatography ( HPLC). Methods Amino acids of honey were concentrated by 732 cation exchange resin, and then were treated by pre-column derivatization with phenyl isothiocyanate, with praline as control peak. The chromatography was performed on a Waters Symmetry C18 ( 250 mm × 4.6 mm × 5 μm) column, with acetonitrile ∶ water (4∶1) as mobile phase A and 30 mmol/L sodium acetate ∶ acetonitrile (355∶15, acetic acid adjusting pH value to be 6.5) as mobile phase B by gradient elution. The detection wave length was set at 254 nm. The flow rate was 1.0 mL/min. The column temperature was 40℃, and the injection volume was 5μL. Results Sixteen common peaks were shown in the fingerprint of 15 batches of honey samples. The similarity for 15 batches of honey samples was in the range of 0.910 ~ 0.996 . Conclusion The fingerprint detection method is simple, practical, reproducible and specific, and can provide certain reference for quality control of honey.