Objective:To evaluate the viability and clinical effect of polyfoliate anterolateral thigh perforator flap (ALTPF) in reconstruction of large soft tissue defect around ankle.Methods:From June 2019 to October 2022, large soft tissue defects around ankle of 11 patients were reconstructed with ALTPF in the Department of Orthopaedics of the First Affiliated Hospital of Nanchang University. The causes of injury were traffic accident in 8 patients and heavy objects in 3 patients. All wounds were large defects (15.0 cm×14.0 cm-30.0 cm×20.0 cm) and combined with various degrees of infection. Intraoperatively, polyfoliate ALTPFs sized 16.0 cm×14.5 cm-23.0 cm×18.5 cm were used in reconstruction of the defects. Deep dead spaces were filled with antibiotic bone cement, and direct suture was performed to close the donor sites or by skin grafting repair. Postoperative follow-ups were scheduled at 1, 3 and 6 months, and 6 monthly thereafter at outpatient clinics and via telephone interviews. The appearance and colour of the flaps and healing of donor sites were recorded together with evaluation of the recovery of ankle motor function according to the ankle-hindfoot rating scale of American Orthopaedic Foot and Ankle Society (AOFAS).Results:All flaps survived. No haematoma or secondary infection occurred at the recipient site after surgery. All donor sites healed primarily. One patient had venous occlusion at the distal end of the polyfoliate ALTPF. The flap survived completely at 1 week after distal venous bloodletting. Postoperative follow-ups lasted 6-24 (15.27±5.21) months. All flaps had good blood supply with satisfactory appearance, similar colour and texture to the recipient sites, and without obvious bloat nor ulceration. Only a linear scar or few skin graft scar was left at the flap donor sites in concealed locations. The mean AOFAS ankle-hindfoot score was (88.36±10.21) point. There were 6 cases of excellent, 4 cases of good, and 1 case of fair.Conclusion:A polyfoliate ALTPF is an ideal flap for reconstruction of soft tissue defects around ankle by converting the length of a flap to the width.

The standardized workflow of computer-aided static guided implant surgery includes preoperative exami-nation,data acquisition,guide design,guide fabrication and surgery.Errors may occur at each step,leading to irrevers-ible cumulative effects and thus impacting the accuracy of implant placement.However,clinicians tend to focus on fac-tors causing errors in surgical operations,ignoring the possibility of irreversible errors in nonstandard guided surgery.Based on the clinical practice of domestic experts and research progress at home and abroad,this paper summarizes the sources of errors in guided implant surgery from the perspectives of preoperative inspection,data collection,guide de-signing and manufacturing and describes strategies to resolve errors so as to gain expert consensus.Consensus recom-mendation:1.Preoperative considerations:the appropriate implant guide type should be selected according to the pa-tient's oral condition before surgery,and a retaining screw-assisted support guide should be selected if necessary.2.Da-ta acquisition should be standardized as much as possible,including beam CT and extraoral scanning.CBCT performed with the patient's head fixed and with a small field of view is recommended.For patients with metal prostheses inside the mouth,a registration marker guide should be used,and the ambient temperature and light of the external oral scan-ner should be reasonably controlled.3.Optimization of computer-aided design:it is recommended to select a handle-guided planting system and a closed metal sleeve and to register images by overlapping markers.Properly designing the retaining screws,extending the support structure of the guide plate and increasing the length of the guide section are methods to feasibly reduce the incidence of surgical errors.4.Improving computer-aided production:it is also crucial to set the best printing parameters according to different printing technologies and to choose the most appropriate postpro-cessing procedures.

Objective By population survey,to explore the epidemiological characteristics of gastric precancerous lesions in Lishui District of Nanjing and provide objective basis for the prevention and treatment of early gastric cancer.Methods From July 2021 to December 2022,21 977 patients who received endoscopy and/or 13C-UBT in Lishui District People's Hospital and 6 medical community units in Nanjing City were retrospectively analyzed for demography characteristics,detection rate of gastric precancerous lesions,and H.Pylori infection rate.Results(1)590 cases of gastric precancerous lesions were detected(detection rate 2.68%);(2)The total detection rate of precancerous lesions and three pathological types in males were all higher than those in females(all P<0.001);(3)The minimum age for the total detection rate of precancerous lesions in males and the mini-mum age for each pathological type were lower than in females(P<0.001,0.009,0.005,0.002);(4)The popu-lation total H.pylori infection rate was 23.10%,the H.pylori infection rate in patients with precancerous lesions was higher than that in non-precancerous lesions(P<0.001),both H.pylori infection rate of male and female in precancerous lesions were all higher than those of non-precancerous lesions of the same sex(all P<0.001),in addition,the H.pylori infection rate of male whether in precancerous or non-precancerous lesions was higher than that of female(all P<0.001);(5)The precancerous lesions detection rate in male,female,and the overall age range of 20～29 to 70～79 years is positively correlated with age growth(P<0.001),and rapidly decreases after the age of 79,the of H.pylori infection rate was also positively correlated with age growth(P<0.001),and the trend of age change(P<0.001)was parallel to the precancerous lesions detection rate.Conclusions The detec-tion rate of gastric precancerous lesions in this region is above the average level in China;the total H.pylori infec-tion rate is at a relatively low level in China;the H.pylori infection rate is parallel to the age trend of the detection rate of gastric precancerous lesions,and increases with age.

Objective To investigate the effect of different optimization algorithms on accurate reconstruction of traffic accidents. Methods Non-dominated sorting genetic algorithm-II ( NSGA-II), neighborhood cultivation genetic algorithm (NCGA) and multi-objective particle swarm optimization (MOPSO) were used to optimize the multi-rigid body dynamic reconstruction of a real case. The effects of different optimization algorithms on convergence speed and optimal approximate solution were studied. The optimal initial impact parameters were simulated as boundary conditions of finite element method, and the simulated results were compared with the actual injuries. Results NCGA had a faster convergence speed and a better result in optimization process. The kinematic response of pedestrian vehicle collision reconstructed by the optimal approximate solution was consistent with the surveillance video. The prediction of craniocerebral injury was basically consistent with the cadaver examination. Conclusions The combination of optimization algorithm, rigid multibody and finite element method can complete the accurate reconstruction of traffic accidents and reduce the influence of human factors.

Objective:To analyze the surveillance data of Kashin-Beck disease (KBD) in Shandong Province, master the changes of KBD, and provide scientific basis for formulating prevention and control strategies of KBD and adjustment of the prevention and control focus of KBD.Methods:According to the requirements of the "National KBD Monitoring Plan" and the "Shandong KBD Monitoring Plan", from 2016 to 2020, the disease monitoring was carried out in the villages of KBD areas in Shandong Province, including the number of clinical positive cases, the number of X-ray positive cases, and the number of metaphyseal positive cases. The detection rate was calculated, and the dynamic changes of the disease was analyzed macroscopically.Results:From 2016 to 2020, a total of 1 816 children aged 7 - 12 years were clinically examined in Shandong Province, and no child with KBD was found. A total of 1 224 children were examined by X-ray, among which 1 positive patient was found in 2016 and 2017, respectively, both of whom were metaphyseal changes, with a total detection rate of 0.16%. There were 367 adult patients with KBD in Shandong Province, including 304 patients with grade Ⅰ, 47 patients with grade Ⅱ and 16 patients with grade Ⅲ. All villages in the KBD areas in Shandong Province had reached the elimination standard, with the elimination rate of 100%.Conclusion:No clinical case of KBD is detected in children aged 7 - 12 years in Shandong Province from 2016 to 2020, which has reached the elimination standard and is in a continuous elimination state.

Objective To investigate the clinical features and maternal and infant outcomes of super-aged pregnant women.Methods The clinical data of pregnant women who gave birth in Maternity and Child Health Care Hospital Affiliated to Xuzhou Medical University from January 2017 to June 2022 were retrospectively analyzed.According to the age of pregnant women,they were divided into super-aged group(≥40 years old,1822 cases)and age-appropriate group(<35 years old,1827 cases).The general conditions,pregnancy complication and comorbidity,delivery outcomes and neonatal outcomes of two groups were compared.Results The number of pregnancies and number of delivery in super-aged group were significantly higher than those in age-appropriate group,and the gestational week of delivery was earlier than that in age-appropriate group(P<0.01).There was no statistical significance in the proportion of assisted reproduction between two groups(P>0.05).The incidences of gestational hypertension,gestational diabetes mellitus,scarring uterus,placenta previa and preterm delivery in super-aged group were significantly higher than those in age-appropriate group(P<0.05),while the incidences of premature rupture of membranes,placental abruption and fetal distress were lower than those in age-appropriate group(P<0.05).The rate of cesarean section and the proportion of uterine binding in super-aged group were significantly higher than those in age-appropriate group(P<0.05),and the rates of vaginal delivery and lateral perineal resection were significantly lower than those in age-appropriate group(P<0.05).There was no significant difference in the average body weight of newborns between the two groups(P>0.05),but the rates of low birth weight infants,macrosomia and neonatal asphyxia in super-aged group were significantly higher than those in age-appropriate group(P<0.05).Conclusion The incidences of pregnancy complications and comorbidity,cesarean section and neonatal complications increased in super-aged pregnant women.We should attach great importance to the prenatal health care and perinatal management of super-aged pregnant women.

Objective:To introduce a new surgical method that retains the sensory nerve branches of the upper eyelid to achieve a more physiological double eyelid effect.Methods:Data of patients in the Department of Plastic Surgery of Jiangsu Province Hospital of Chinese Medicine from March 2021 to February 2022, who underwent full-incision double-eyelid blepharoplasty with selective sensory nerve preservation were retrospectively analyzed. During the procedure, the skin and orbicularis oculi muscle were incised along the design line, the orbicularis oculi muscle was separated, and the pretarsal fascia layer was exposed. One or two oblique inward nerve branches could be seen on the medial side of the midline of the pupil, which were carefully dissected and preserved. The deep orbital septum was separated and part of the orbital septum fat was removed. Orbicularis oculi muscle-pretarsal fascia sutures were placed to form a natural double eyelid. Suture the skin without tension. Complications were followed up after operation. After 3 to 12 months of surgery, the tactile sensation of the corresponding areas above and below the double eyelid line was examined using the Semmens-Weinstein monofilament with light touch method. The tactile loss of the skin below the double eyelid line was evaluated and divided into three levels: no difference, mild difference, and significant difference. The patient’s satisfaction with the surgical outcome was evaluated and divided into four levels: very satisfied, satisfied, average, and dissatisfied.Results:A total of 79 patients (158 eyes) with double eyelid blepharoplasty were enrolled in the study. The follow-up time was 3-12 months, with an average follow-up time of 9.4 months. The upper eyelid sensation of 89.9% (142/158) was evaluated as "no difference", and 10.1% (16/158) was evaluated as "mild difference". No patient reported discomfort symptoms such as upper eyelid numbness or sensory abnormalities. Two patients had slight asymmetry. One patient developed a hematoma, which was self-absorbed two weeks later with mild asymmetry of double eyelids. One patient had a hypertrophic scar, which was treated with an external application of silicone gel combined with laser therapy. The patients recovered 9 months after surgery.Conclusion:Full-incision double eyelid blepharoplasty with the preservation of the upper eyelid sensory nerve branch is a new operation with a natural effect, retaining the skin sensation below the double eyelid line, reducing postoperative complications and recovery period.

Objective:To introduce a new surgical method that retains the sensory nerve branches of the upper eyelid to achieve a more physiological double eyelid effect.Methods:Data of patients in the Department of Plastic Surgery of Jiangsu Province Hospital of Chinese Medicine from March 2021 to February 2022, who underwent full-incision double-eyelid blepharoplasty with selective sensory nerve preservation were retrospectively analyzed. During the procedure, the skin and orbicularis oculi muscle were incised along the design line, the orbicularis oculi muscle was separated, and the pretarsal fascia layer was exposed. One or two oblique inward nerve branches could be seen on the medial side of the midline of the pupil, which were carefully dissected and preserved. The deep orbital septum was separated and part of the orbital septum fat was removed. Orbicularis oculi muscle-pretarsal fascia sutures were placed to form a natural double eyelid. Suture the skin without tension. Complications were followed up after operation. After 3 to 12 months of surgery, the tactile sensation of the corresponding areas above and below the double eyelid line was examined using the Semmens-Weinstein monofilament with light touch method. The tactile loss of the skin below the double eyelid line was evaluated and divided into three levels: no difference, mild difference, and significant difference. The patient’s satisfaction with the surgical outcome was evaluated and divided into four levels: very satisfied, satisfied, average, and dissatisfied.Results:A total of 79 patients (158 eyes) with double eyelid blepharoplasty were enrolled in the study. The follow-up time was 3-12 months, with an average follow-up time of 9.4 months. The upper eyelid sensation of 89.9% (142/158) was evaluated as "no difference", and 10.1% (16/158) was evaluated as "mild difference". No patient reported discomfort symptoms such as upper eyelid numbness or sensory abnormalities. Two patients had slight asymmetry. One patient developed a hematoma, which was self-absorbed two weeks later with mild asymmetry of double eyelids. One patient had a hypertrophic scar, which was treated with an external application of silicone gel combined with laser therapy. The patients recovered 9 months after surgery.Conclusion:Full-incision double eyelid blepharoplasty with the preservation of the upper eyelid sensory nerve branch is a new operation with a natural effect, retaining the skin sensation below the double eyelid line, reducing postoperative complications and recovery period.

We have discovered and synthesized a series of indole-based derivatives as novel sigma-2 (σ ₂) receptor ligands. Two ligands with high σ ₂ receptor affinity and subtype selectivity were then radiolabeled with F-18 in good radiochemical yields and purities, and evaluated in rodents. In biodistribution studies in male ICR mice, radioligand [¹⁸F]9, or 1-(4-(5,6-dimethoxyisoindolin-2-yl)butyl)-4-(2-[¹⁸F]fluoroethoxy)-1H-indole, was found to display high brain uptake and high brain-to-blood ratio. Pretreatment of animals with the selective σ ₂ receptor ligand CM398 led to significant reductions in both brain uptake (29%-54%) and brain-to-blood ratio (60%-88%) of the radioligand in a dose-dependent manner, indicating high and saturable specific binding of [¹⁸F]9 to σ ₂ receptors in the brain. Further, ex vivo autoradiography in male ICR mice demonstrated regionally heterogeneous specific binding of [¹⁸F]9 in the brain that is consistent with the distribution pattern of σ ₂ receptors. Dynamic positron emission tomography imaging confirmed regionally distinct distribution and high levels of specific binding for [¹⁸F]9 in the rat brain, along with appropriate tissue kinetics. Taken together, results from our current study indicated the novel radioligand [¹⁸F]9 as the first highly specific and promising imaging agent for σ ₂ receptors in the brain.

Objective:To evaluate the effect of health education of a three-year special action for prevention and control of drinking water-borne endemic fluorosis (referred to as drinking water-borne fluorosis) in Shandong Province, and to provide basis for formulating health education measures in the next step.Methods:Nineteen of the disease affected counties (cities and districts) were selected as project counties (cities and districts) in key areas for prevention and control of drinking water-borne fluorosis in Shandong Province in 2018, and 50 disease affected counties (cities and districts) were selected in 2019, and the project counties (cities and districts) were expanded to all of the 105 disease affected counties (cities and districts) in Shandong Province in 2020. Three disease affected townships (towns) were selected in each county (city and district), and health education activities on drinking water-borne fluorosis were carried out in Grade 4 to Grade 6 of the central primary schools and the three villages under its jurisdiction. Students and housewives were selected to conduct questionnaire surveys on prevention and control knowledge of drinking water-borne fluorosis before and after health education. The incidence of dental fluorosis among children aged 8 - 12 years was investigated annually in 6 villages (with children aged 8 - 12 years > 50) , where health education activity was implemented and the incidence of dental fluorosis among children was > 30%, water fluoride content was > 1.5 mg/L and water improvement time was < 5 years.Results:After health education, the awareness rates of drinking water-borne fluorosis in fifth grade pupils [92.46% (4 571/4 944) vs 65.80% (3 334/5 067) in 2018; 94.84% (12 897/13 599) vs 73.55% (9 993/13 587) in 2019; 95.59% (30 407/ 31 809) vs 77.52% (24 463/31 557) in 2020] and housewives [94.12% (2 400/2 550) vs 76.04% (1 939/2 550) in 2018; 94.99% (6 412/6 750) vs 72.00% (4 860/6 750) in 2019; 95.53% (16 183/16 941) vs 78.43% (12 971/16 539) in 2020] were significantly improved (χ 2 = 1 070.47, 2 315.27, 4 456.40, 328.25, 1 294.80, 2 174.63, P < 0.05). After health education in 2020, there were significant differences in the correct answer rates of epidemic causes, hazards and preventive measures of drinking water-borne fluorosis in the questionnaire of fifth grade pupils and housewives (χ 2 = 390.78, 164.94, P < 0.05). The awareness rates of drinking water-borne fluorosis in fifth grade pupils and housewives in the eastern region (Qingdao City, Yantai City and Weifang City) were significantly higher than those in the western region (Dezhou City, Liaocheng City and Heze City) before health education (χ 2 = 547.43, 210.12, P < 0.05), and after health education, the awareness rates increased to more than 90%. The detection rate of dental fluorosis in children decreased year by year (χ 2trend = 27.95, P < 0.05). Conclusions:Through implementation of a three-year special action for prevention and control of drinking water-borne fluorosis in Shandong Province, the awareness rate of fluorosis among target populations has been significantly improved. However, it is still necessary for government departments to further increase investment in health education and carry out health education activities in a deep-going way.