1.A Study on Arrenotokous Toxic Action of Diphenylmethane Diisocyanate and Its Mechanism
Jinpeng ZHOU ; Jie LI ; Dafeng LIN
Journal of Environment and Health 1992;0(02):-
Objective To evaluate the arrenotokous toxic action and the related mechanism of MDI in mature male KM mice. Methods The 8-month-old healthy KM mice were intraperitoneally injected with MDI maize oil solution at the dose of 0、62.5、125.0、250.0 mg/kg in normal control group and 3 experiment groups respectively for 14 days.The male mice were killed on day 15 for the measurement of the viscera coefficient of testis and epididymis, the sperm count in epididymis, the activities of enzymes of testis,and concentration of related hormone in testis and blood serum. Results There was no significant difference in body weight between the experiment and the control groups. The viscera coefficient of testis and epididymis in 250.0 mg/kg group decreased significantly compared with the control group(P
2.Effects of Diphenyl Methane Diisocyanate Exposure at Gestation on Energy Metabolism in Testis of Adult Male Offspring Mice
Dafeng LIN ; Xujian HOU ; Wenjing ZHANG
Journal of Environment and Health 1992;0(04):-
0.05). Comparing with 1/8 LD50 MDI group,all 1/16 LD50,1/32 LD50 MDI and the control group were significantly higher in testis coefficient (P
3.The causes and strategies for the postoperative shortening in distal radius fractures.
De-fu YANG ; Gong-lin ZHANG ; Li-ping XIA ; Yu HUI ; Jian-hua HUANG ; Jian-feng CHEN
China Journal of Orthopaedics and Traumatology 2010;23(8):581-584
OBJECTIVETo analyze the cause of the postoperative shortening in distal radius fractures and to find treatment strategies to enhance the reduction effect of distal radius fracture and long-term efficacy.
METHODSFrom June 2005 to January 2009, 46 patients with distal radius fractures were treated by surgical operation including 17 males and 29 females,ranging from 27 to 90 years old with an average age of 48 years. All fractures were reduced satisfactory with smooth articular surface. The postoperative radial shortening was analyzed.
RESULTSAll patients were followed-up for 6 to 24 months with an average of 14 months. Among them, 12 patients had radial shortening. The causes of postoperative radial shortening includes: (1) patients older than 60 years; (2) severe osteoporosis; (3) preoperative displacement and comminuted fractures; (4) inappropriate fixation methods; (5) inadequate bone graft; (6) premature load.
CONCLUSIONThe key points to enhance the treatment outcomes include precise judgement of the fracture type and bone quality, sufficient bone graft, firmly fixed after anatomical reduction and an appropriate plan for early loadless functional exercise. Traumatic arthritis may be avoided or delayed if the above-mentioned six causes can be taken into consideration or preventive measures can be taken.
Adult ; Age Factors ; Aged ; Aged, 80 and over ; Bone Transplantation ; Female ; Follow-Up Studies ; Fracture Fixation ; Humans ; Male ; Middle Aged ; Osteoporosis ; etiology ; Postoperative Complications ; etiology ; therapy ; Radius ; pathology ; Radius Fractures ; surgery
4.Hybrid external fixator combined with limited internal fixation for the treatment of high-energy tibial plateau fractures.
De-fu YANG ; Gong-lin ZHANG ; Ming ZHANG ; Li-ping XIA ; Ji-hua HE ; Jun-yang PENG
China Journal of Orthopaedics and Traumatology 2009;22(3):219-220
Adult
;
Aged
;
External Fixators
;
Female
;
Fracture Fixation, Internal
;
methods
;
Humans
;
Male
;
Middle Aged
;
Tibial Fractures
;
surgery
5.Occupational cancer surveillance in China
Dafeng LIN ; Yanfang ZHANG ; Xianqing HUANG
Global Health Journal 2018;2(2):24-32
Occupational cancer causes a large number of deaths every year, posing a great threat to public health in China and abroad. Occupational cancer surveillance can help to dynamically monitor and predict the trend of cancer occurrence and provide basic reference for the formulation of occupational cancer prevention and treatment measures. Occupational cancer surveillance started late in China relative to developed western countries, but formed its own characteristics through years of development of legislation and institutional reform, and large-scale epidemiological investigations and laboratory research. Occupational cancer surveillance is currently a part of cancer surveillance system of the National Cancer Center, as well as an integral part of occupational disease surveillance in China. It generally includes not only cancer incidence surveillance, but also cancer-related occupational risk factor surveillance, and surveillance of effects of occupational cancer prevention, treatment, and intervention. The methods of occupational cancer surveillance in China include passive monitoring, active monitoring, and sentinel monitoring. These methods have their respective advantages and disadvantages and would be best to be combined in practice. The rapid development of economy and technology, and continuous advancement of hospital informatization, especially the establishment and application of big data on occupational cancer, may point out directions for the development of occupational cancer surveillance in the future. Occupational cancer prevention and control in China still has a long way to go and the destination is to achieve primary prevention for occupational cancer.
6.Myocardial Protection Effect of Dexmedetomidine in Patients Undergoing Open-heart Surgery under CPB
Qiugu ZENG ; Dafeng LI ; Xiangru CEN ; Yiyou YANG ; Xianqin CHEN ; Baoliu LIN ; Yuexian TAN
Modern Hospital 2017;17(5):752-754
Objective To observe the myocardial protective effect of dexmedetomidine in patients undergoing open-heart surgery under cardiopulmonary bypass (CPB).Methods 50 patients of open-heart surgery under CPB were randomly divided into two groups equally, namely observation group and control group.Observation group was treated with injection of dexmedetomidine at 0.5 μg/kg for 15 min, and then maintained at 0.4 μg/kgoh.The control group was given equal volume of normal saline.Concentrations of IMA and cTnI were determined before anaesthesia (t0), after 30 minutes of CPB (t1) and after surgery (t2).Results IMA and cTnI concentrations of t1 and t2 in the observation group were significantly lower than those in the control group (P<0.05).Conclusion Dexmedetomidine has obvious protective effect on myocardium, which can reduce open-heart surgery of patients with myocardial ischemia reperfusion injury (MIRI).
7.AIDS patients with opportunistic infections in Sichuan province:clinical analysis of 1 465 cases
Shenghua HE ; Ruifeng ZHOU ; Dafeng LIU ; Lin CAI ; Yin WANG ; Xiaofei ZHOU ; Yi ZHANG ; Chunlan ZHANG ; Xiaoxia LIU ; Yao ZHANG
Chongqing Medicine 2014;(5):592-593,596
Objective To study clinical characters and prognosis of AIDS patients with opportunistic infections in Sichuan prov-ince .Methods We performed an retrospective analysis of 1 465 AIDS patients with opportunistic infections who were admitted into the transmitted disease hospital of Chengdu in recent 10 years .Results The overall mortality during hospitalization was 15 .49% . The leading cause of death was respiratory failure due to pneumonia (n=150 ,74 .62% ) or meningitis(n=47 ,23 .86% ) .Descending rank order of common opportunistic infections were respiratory tract ,the mouth swallows ,central nervous system ,gastrointestinal tract skin ,blood system .Descending rank order of common sites of infections were respiratory tract ,oropharynx ,central nervous system ,gastrointestinal tract skin ,reproductive tract .The multiple infections are common :more than 50% of patients suffering from two or more infections(50 .77% ) .Complexity of infection sites :42 .18% dual infection sites and 17 .20% three or more infec-tion sites .Conclusion The opportunistic infections disease spectrum of AIDS in Sichuan area has its own characteristics :multiple infections and multiple infections sites are both common ,death risks are high ,conditions of patients are severe generally ,and respir-atory failure is the main cause of death .
8.Determination of indiumin urine by inductively coupled plasma mass spectrometry.
Yiran LIN ; Juntao HE ; Xiaozuo XU ; Jiangwei YIN ; Liuzhuo ZHANG ; Dafeng LIN ; Zhimin LI ; Juan YI
Chinese Journal of Industrial Hygiene and Occupational Diseases 2015;33(8):630-631
Humans
;
Indium
;
urine
;
Mass Spectrometry
;
methods
;
Spectrum Analysis
;
methods
9. Detection of HLA-B*13:01 gene by dual allele-specific real-time polymerase chain reaction in patients with trichlorethylene-induced dermatitis
Dafeng LIN ; Yanhua YANG ; Dianpeng WANG ; Peimao LI ; Zhimin ZHANG ; Yanfang ZHANG ; Xianqing HUANG
Chinese Journal of Industrial Hygiene and Occupational Diseases 2017;35(8):589-591
Objective:
To investigate the detection of a human leukocyte antigen-B (HLA-B) allele
10.Analysis on work-related musculoskeletal disorders and sickness absence among key industry workers in Shenzhen City
Shaofan WENG ; Wei ZHOU ; Xinyun ZHUANG ; Dafeng LIN ; Liuzhuo ZHANG ; Dexiang ZHU ; Naixing ZHANG
China Occupational Medicine 2023;50(6):689-693
{L-End}Objective To understand the prevalence of work-related musculoskeletal disorders (WMSDs) and sickness absence due to WMSDs among key industry workers in Shenzhen City. {L-End}Methods A total of 14 949 workers exposed to dust, noise, chemical and radiation (hereinafter referred to as "traditional occupational groups") in some key industries in Shenzhen City, as well as bus drivers, teachers, medical staff, policemen, courier, sanitation workers and video operators were selected as the research subjects using stratified cluster sampling. The Musculoskeletal Disorders Questionnaire was used to investigate the prevalence of WMSDs and sickness absence due to WMSDs in the past year. {L-End}Results The overall prevalence of WMSDs among the study subjects was 56.3% (8 423/14 949). The prevalence of WMSDs in different body parts from high to low was neck, waist, shoulder, back, knee, wrist, ankle, hip, and elbow, which was 37.6%, 35.7%, 31.7%, 25.2%, 18.3%, 15.4%, 14.9%, 12.4%, and 11.6%, respectively (P<0.01). The overall prevalence of WMSDs among different occupational groups from high to low was teachers, video operators, bus drivers, couriers, medical staff, policemen, traditional occupational groups, and sanitation workers, which was 82.2%, 75.7%, 74.9%, 73.9%, 67.9%, 64.3%, 43.3%, and 31.9%, respectively (P<0.01). The overall rate of sickness absence due to WMSDs was 18.3% (2 736/14 949). The overall rate of sickness absence among different occupational groups from high to low was bus drivers, couriers, teachers, traditional occupational groups, policemen, video operators, medical staff, and sanitation workers, which was 31.6%, 24.5%, 20.9%, 20.2%, 15.2%, 12.4%, 9.3%, and 6.7%, respectively (P<0.01). Among different parts of the body, the highest correlation coefficient of WMSDs was found between neck and shoulder [correlatioon cofficient (r)=0.648, P<0.01], while the lowest was between neck and ankle (r=0.303, P<0.01). {L-End}Conclusion The prevalence of WMSDs and sickness absence due to WMSDs among key industry workers in Shenzhen City is relatively high. Comprehensive prevention and control measures should be taken according to the characteristics of occupational population to reduce the impact of WMSDs on the health of occupational population.