Objective: To optimize the preparation technology of Bushen Yinao Dispersible Tablets (BYDT) and establish a method for the quality control of BYDT. Methods: The prescription of BYDT was optimized by single factor test with the disintegrating time as index. The contents of psoralen and isopsoralen were determined by HPLC. The dissolution of BYDT was determined and compared with other two preparations. Results: PVPP was optimized as the disintegrants, MCC was optimized as the stuffing bulking agents, the proportion of PVPP and MCC was 1:2.7, and 80% ethanol was optimized as adhesives. The concentration of psoralen and isopsoralen showed a good linear relationship at the range of 4.2-52.5 and 4.6-57.5 μg/mL (r=0.9998), respectively. The average recoveries of psoralen and isopsoralen were 98.89% with RSD of 0.53%; and 100.65% with RSD of 0.93%, respectively. The total content and dissolution of psoralen and isopsoralen had no significant differences among different batches. BYDT had the higher dissolution speed and could reach the highest dissolution rate in vitro compared with the other preparations. Conclusion: This prescription of BYDT is reasonable and effective. The method is simple and accurate and could be used for the quality control of BYDT.

Objective: In order to find out the prevalence and death of pneumoconiosis in Qingyuan City, to explore the regularity of pneumoconiosis and lay a foundation for the prevention and management of pneumoconiosis. Methods: In August to December 2019, the basic data of pneumoconiosis from 1949 to 2018 were obtained through the monitoring of death causes of residents, occupational disease management system, Guangdong population information system and other means. The reported cases of pneumoconiosis were followed up, and retrospective investigation was conducted to analyze the basic conditions, the length of service exposed to dust, the time of diagnosis, the type of disease, the stage and the combined status of tuberculosis of pneumoconiosis cases. Results: From 1949 to 2018, a total of 466 cases of new pneumoconiosis were reported in Qingyuan City, including 325 cases of death (69.74%) , 114 cases of survival (24.46%) and 27 cases of loss of follow-up (5.80%) . The cases were mainly concentrated in the age group of 40-89 years (80.04%, 373/466) . There were 411 male cases (88.20%) and 7 female cases (1.50%) . The median length of service exposed to dust was 10.7 (6.0, 16.0) years. The diagnosis time of pneumoconiosis cases was mainly from 1949 to 1986 (68.67%, 320/466) , and the death cases were mainly from 1949 to 1986 (82.77%, 269/325) . Silicosis was the main type of pneumoconiosis (398 cases, 85.41%) . 200 cases (42.92%) were diagnosed as stage I pneumoconiosis, 185 cases (39.69%) were stage II pneumoconiosis, 81 cases (17.38%) were stage III pneumoconiosis at the first diagnosis. 102 cases (21.89%) were pneumoconiosis with tuberculosis. The proportion of death and lost follow-up cases diagnosed as stage I pneumoconiosis for the first time was significantly lower than that of survival cases, and the proportion diagnosed as stage II pneumoconiosis and the complication rate of tuberculosis were significantly higher than those of survival cases (χ(2)=15.48, 11.29, 32.73, P<0.001) . Conclusion: Pneumoconiosis in Qingyuan City is mainly silicosis. The number of new cases has been increasing in the past decade, and the prevention and control situation is still severe. The comprehensive prevention and treatment of silica dust should be included in the focus of supervision of government functional departments.
Adult ; Aged ; Aged, 80 and over ; China/epidemiology* ; Dust ; Female ; Humans ; Male ; Middle Aged ; Occupational Diseases/epidemiology* ; Pneumoconiosis/epidemiology* ; Retrospective Studies ; Silicosis/epidemiology*

The fact that incision inflammation ratio is related to the time of preoperative skin preparation was explored.227 cases made skin preparation a day or two hours before surgical operation were analysed prospectively in this study.There is statistical significant difference between the two periods of preoperative skin preparation:the second (two hours before surgical operation) can greatly lower the ratio of incision inflammation.

Objective:To evaluate the effectiveness and safety of endovascular treatment in solving symptomatic cerebral artery tandem lesions.Methods:From June 201 2 to February 201 4,1 2 cases (24 lesions)with symptomatic cerebral artery tandem lesions were accepted for the endovascular treatment. The distributions of the tandem lesions were as follows:the common carotid artery and internal carotid ar-tery (1 case),the internal carotid artery and the proximal of the carotid cavernous sinus segment (3 ca-ses),the internal carotid artery and the distal of the carotid cavernous sinus segment (4 cases),the in-tracranial segment of internal carotid artery and middle cerebral artery M1 segment (2 cases),the first segment of vertebral artery and intracranial segment of vertebral artery (2 cases).All of these cases were treated from distal lesions to proximal lesions except for tandem lesions in the internal carotid artery and the distal of the carotid cavernous sinus segment in order to obtain better support.Tandem lesions were treated in the same operation with local anesthesia or general anesthesia.The procedures of the 1 2 cases retrospectively were analyzed and the peri-operation complications and responsibility region recurrent is-chemic stroke incidents observed.Results:All tandem lesions were solved successfully all at once.There were no peri-operation complications or recurrent ischemic stroke incidents.There were no recurrent is-chemic stroke incidents or stent restenosis cases in the follow-up.Conclusion:It is safe and effective for selective endovascular treatment in solving symptomatic cerebral artery tandem lesions at the same time, but we should take careful preoperative evaluation and improve the operation plan.

Objective:To anslysis the hemodynamic states of vertebrobasilar dolichoectasia based on computational fluid dynamics technique.Methods:The original DICOM format image data from a patient with vertebrobasilar dolichoectasia (VBD), were imported by the Mimics software directly,and the 3D Objects were constructed.The simulation of model was made with Ansys software, the hemodynamic pa-rameters such as streamlines, wall shear stress( WSS) and wall pressure were described.Results:There was stable laminar flow in proximal basilar artery and was no blood flow mixed by bilateral vertebral arter-y.However, Spiral flows were appeared in distal tortuous basilar artery.The low WSS regions in the ver-tebra-basilar junction section and inferior segment of basilar artery were coincide with the high wall pres-sure regions.It could be speculated the initial growth regions might be located in the vertebra-basilar junction section and inferior segment of basilar artery.Local regions with low WSS and high wall pressure might be associated with the occurrence and development of VBD.Conclusion: CFD numerical simula-tion maybe can provide a theoretical basis for the role of hemodynamic factors in occurrence and develop-ment of VBD.

Objective:To analyze correlation factors of hemodynamic damage after carotid artery stenting.Methods:In this study, 66 cases (71 lesions) who undertook carotid artery stenting were col-lected and the correlation factors of hemodynamic damage were analyzed .Results:Hemodynamic damage emerged in 23 cases (32.4%), of which, 11.3%developed hypotension.The distance between bifurca-tion and lesions (P=0.002 0), plaque distribution (P=0.000 2), plaque character (P=0.001 9), post-dilation ( P =0.002 6 ) were associated with hemodynamic damage by single factor analysis . However, only eccentric plaque (P=0.015 3) and calcified plaque (P=0.009 7) were associated with hemodynamic damage by multiple factors analysis .All the patients could reach stable circulation by drugs during operation , and no cerebral ischemic events ( transient ischemic attack or stroke ) and cardiovascu-lar ischemic events happened .Conclusion: The distance between bifurcation and lesions , eccentric plaques, calcified plaques are correlation factors of hemodynamic damage .

OBJECTIVETo review the clinical features of duodenal gastrointestinal stromal tumors(GISTs), and to compare the clinical efficacy among different surgical treatments for duodenal GISTs.

METHODSClinicalpathological data of 36 cases of duodenal GISTs undergoing operation in The First Affiliated Hospital of Sun Yat-sen University from January 2000 to July 2013 were retrospectively analyzed. All the patients received surgical treatments, including 15 cases with regional resection, 8 cases with segmental resection, 12 cases with pancreaticoduodenectomy (PD), and 1 case with liver biopsy, respectively. Clinical efficacy between pancreaticoduodenectomy (PD) and non-PD (NPD) was compared.

RESULTSNine of 36 cases (25%) developed postoperative complications who were all in the PD group. Eight patients recovered and healed finally after active treatment, and 1 case was complicated with acute pancreatitis, pancreatic fistula and intra-abdominal infection. The median follow-up time was 54 months and the 5-year overall survival (OS) rate and 5-year recurrence-free survival (RFS) rate were 78.1% and 72.1%, respectively. The 5-year OS rate in the PD group and the NPD group was 61.1% and 61.1% respectively. The 5-year RFS rate in the PD group and the NPD group was 85.8% and 78.8% respectively. Statistical analysis showed no significant difference between the both groups (P=0.71 and P=0.89).

CONCLUSIONSFor duodenal GISTs patients, regional resection and segmental resection have similar clinical outcomes to pancreaticoduodenectomy while the former two can obviously decrease the incidence of postoperative complications. Based on the premise of R0 resection guaranteed, regional sectional and segmental resection with less injury should be the surgical treatment of choice.

Duodenal Neoplasms ; Gastrointestinal Stromal Tumors ; Humans ; Intraabdominal Infections ; Pancreatic Fistula ; Pancreaticoduodenectomy ; Postoperative Complications ; Retrospective Studies ; Survival Rate

OBJECTIVETo establish subcutaneous xenograft models of gastric cancer in nude mice and to screen the predictive biomarkers of bevacizumab effectiveness.

METHODSSubcutaneous xenograft models were established using BGC823 gastric cancer cell line in 20 male 4-week old BALB/C-nu/nu nude mice and were randomly divided into four groups, bevacizumab group(15 mg/kg), 5-FU group(15 mg/kg), combined group and control group, with 5 mice in each group. Bevacizumab and 5-FU were administered intraperitoneally every other day for three weeks. After treatment, tumor size and inhibition rate were calculated. Expression of CD31 was examined by immunohistochemistry for evaluation of microvascular density(MVD). Levels of human vascular endothelial growth factor(VEGF), basic fibroblast growth factor (bFGF), placental growth factor (PIGF) and interleukin 8(IL-8) were tested by enzyme linked immunosorbent assay(ELISA).

RESULTSCompared to the control group, bevacizumab group and combined group had a significantly lower MVD(5.2±1.0 and 4.3±1.2 vs. 13.8±1.6, P<0.05), a smaller tumor volume [(305.6±184.1) mm(3) and (242.2±71.4) mm(3) vs.(1535.2±625.1) mm(3), P<0.05], and lower levels of VEGF and IL-8 in tumor tissues [VEGF:(351.6±84.1) ng/L and (242.2±71.4) ng/L vs. (1256.7±702.1) ng/L, P<0.05); IL-8:(20 903±1485) ng/L and (27 489±6772) ng/L vs. (57 032±2437) ng/L, P<0.05]. The above parameters were not significantly different between 5-FU group and control group(all P>0.05). Levels of bFGF and IGF were not significantly different among four groups as well(all P>0.05).

CONCLUSIONVEGF and IL-8 may be used to be biomarkers candidates to predict bevacizumab effectiveness on human gastric cancer.

Animals ; Antibodies, Monoclonal, Humanized ; Bevacizumab ; Biomarkers ; Cell Line, Tumor ; Fluorouracil ; Heterografts ; Humans ; Immunohistochemistry ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Stomach Neoplasms ; Vascular Endothelial Growth Factor A ; Xenograft Model Antitumor Assays

Objective:To investigate the clinical efficacy of femoral component revision surgery in addressing polyethylene sleeve wear in rotating hinge knee joints.Methods:A retrospective analysis was conducted on 21 patients who underwent treatment for polyethylene sleeve wear in rotating hinge knee joints at the Department of Orthopaedics, the Fourth Medical Center, PLA General Hospital, spanning from August 2008 to April 2023. There were 8 males and 13 females with a median age of 63(38, 76) years. Among them, 11 cases involved the left side, and 10 cases involved the right side. The average body mass index (BMI) was 25.0(22.5, 31.0) kg/m 2, and all cases underwent unilateral knee joint revision. The time interval from receiving the hinge knee joint prosthesis to revision was 10.5(6.0, 17.0) years, with 18 cases undergoing primary revision and 3 cases undergoing revision for the second time. Revision surgery of the femoral component sleeve was performed in all patients due to polyethylene sleeve wear. Visual analogue scale (VAS), range of motion (ROM) of the knee joint, changes in hip-knee-ankle angle (HKA), and Knee Society score (KSS) were collected and recorded to assess the surgical outcomes. Results:All patients were followed up for a median duration of 12.5(11.7, 13.4) months. Preoperatively, the VAS score was 5(3, 7) points, which significantly decreased to 0(0, 1) points at the last follow-up ( Z=5.721, P<0.001). At the last follow-up, the KSS scores decreased from 41.19±13.65 points preoperatively to 79.81±7.80 points, indicating a statistically significant difference ( t=12.560, P<0.001). HKA increased from 174.65°±5.20° preoperatively to 178.71°±2.79°, with a statistically significant difference ( t=5.533, P<0.001). Knee joint ROM increased from 69.05°±34.37° preoperatively to 110.00°±10.12°, also demonstrating a significant improvement ( t=5.960, P<0.001). Notably, patients exhibited knee joint stability with no passive flexion or extension laxity. Conclusion:Femoral component sleeve revision surgery effectively addresses polyethylene sleeve wear in rotating hinge knee joint prostheses, thereby mitigating the substantial loss of bone and soft tissue associated with overall revision procedures. The early postoperative clinical outcomes are promising and indicative of the efficacy of this surgical intervention.

The first bite syndrome is a rare maxillofacial pain syndrome easily ignored by clinicians. The pain caused by it not only makes it difficult for patients to eat and delays surgical wound healing, but also rises fear and anxiety of patients while they eat, which would severely reduce their life quality. There are few case reports about the first bite syndrome in China, and clinicians know little about it. Therefore, the early diagnosis and treatment of such a disease are important. In this review, we thoroughly reviewed the etiology and classification, pathogenesis, clinical manifestation, and current treatments of the first bite syndrome, aiming at providing some suggestions for clinicians.