Arthroplasty, Replacement, Hip ; Femoral Neck Fractures ; surgery ; Fracture Fixation, Internal ; Humans

China ; Humans ; Orthopedics ; methods ; trends ; Traumatology ; methods ; trends

Objective To study the mechanism of sacral plexus injury resulting from anteroposteri- or compression zone-Ⅱsacral fractures.Methods Six short-term(within one year)embalmed pelves were obtained from Anatomic Department of Hebei Medical University.The preserved sacral plexus and re- sected pubic symphysis were used to make the models of anteropesterior compression zone-Ⅱsacral frac- tures.Quantitative analysis for fracture displacement was carried out to observe the characteristics and mechanism of sacral plexus injury.The removed sacral plexus was replaced by proportional diameter silica gel pips filled with contrast medium.The experimental procedure was repeated under X-ray.The experi- mental data were analyzed by SPSS 10.0 statistic software to obtain result.Results In anteropostefior compression sacral fracture,sacral nerve canal was gradually opened and its volume raised.No sacral nerve was opressed in nerve canal.However ilium external rotation prolonged sacral nerves,especially S_1,S_4 and the more the pubic symphsis was separated the more the sacral plexus nerves were prolonged.At the same time,the sharp border of fracture segment stabbed the nerves,especially L_5(6 cases),S_1(5 cases)and S_2 (3 eases).Conclsions Sacral plexus is tightly connected with the wall of pelvic cavity and fixed. When zone-Ⅱsacral fractures happen sacral plexus is easily damaged.In anteroposterior compression sacral fracture,nerves S_1 and S_4 are likely to be damaged by dragment,and nerve compression injury is attributed to stabbing by fracture segment border,with L_5 and S_1.more hackneyed.

Objective To study the MRI manitestation of juvemle acute pure cartilage fracture of the knee joint.Methods The MRI changes of cartilage,subcartilage low signal line and subcartilage bone were analysed retrospectively in 26 juvenile patients with acute pure cartilage fracture confirmed by arthroscopy.Sagittal and coronal MRI scanning were performed in 26 patients.Using fast low angle shot fat saturation T_1-weighted image(FLASH-FS-T_1WI)sequences,spin echo T_1-weighted image(SE-T_1WI)and fast imaging with steady-state precession three dimensional fat saturation T_2-weighted image(FISP-3D-FS- T_2WI)sequences in sagittal plane,SE-T_1WI and multi echo data image combination T_2-weighted imaging (MEDIC or ME-T_2WI)in coronal plane.Using ME-T_2WI sequence,axial plane MRI scanning in 5 patients.Results Twenty-seven sites of 26 patients include 8 patella,7 femoral medial condyle, 11 femoral lateral condyle and 1 tibial plateau.Three types pure cartilage fracture were observed,totally defect of the cartilage in 7 sites(include 3 patella,2 femoral medial condyle,1 femoral lateral condyle and 1 tibial plateau),fissuring fracture in 3 sites(include 2 femoral medial and 1 femoral lateral condyles), superficial defect of the cartilage in 17 sites(include 5 patella,3 femoral medial and 9 femoral lateral condyle).Corpus liberum was found in 21 patients'knee joints by arthroscopy,but only 3 cases by MRI. Bone bruise was detected,and subcartilage low signal lines were normal.Conclusion Using FLASH-FS- T_1WI,SE-T_1WI,FISP-3D-FS-T_2WI and ME-T_2WI sequences,sagittal and coronal MRI scanning in femoral and tibial plateau pure cartilage fractures,and using ME-T_2WI sequence axial scanning in patella r cartilage fractures may show the position,extension and types of the acute pure cartilage fracture of the knee joint. MRI is the hest non-invasive method for studying cartilage fracture.

Objective To evaluate the expression of RAR-? gene in cervical carcinoma cell lines SiHa,HeLa,C33A and Caski and to analyze the relation between their gene expression and the promoter methylation of RAR-? DNA.Methods The expression of mRNA and protein of RAR-? gene in the four cell lines were analyzed by RT-PCR,western blot and immunofluoreseence,respectively.Methylation specific PCR(MSP)was used to check whether there was methylation in the promoter of RAR-? gene.The demethylating agent 5-aza-2'-deoxycytidine(5-Aza-cdR)was used to treat methylated cell lines and the change of RAR-? gene methylation and RAR-? gene expression defects were observed.The cell proliferation was assayed with 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide method.Results The mRNA and protein expression levels of RAR-? in cell lines SiHa,HeLa,Caski and C33A were 0.25 ?0.08,0,0.60?0.19,3.12?0.92 and 0.23?0.07,0,0.14?0.05,0.68?0.21,respectively.The mRNA and protein expression of RAR-? in SiHa,HeLa and Caski cell lines were decreased or silenced, whereas its expression increased in C33A cell line.MSP method showed that there were RAR-? gene methylation in SiHa,HeLa and Caski cell lines,while there was no RAR-? gene methylation in C33A cell line.After treated with 5-Aza-cdR,the mRNA and protein expression levels of RAR-? in SiHa,HeLa, Caski and C33A cell lines were 1.82?0.59,2.13?0.62,1.67?0.43,2.95?0.89 and 0.69?0.21, 0.83?0.29,0.56?0.16,0.64?0.20 respectively.The mRNA and protein levels of RAR-? had a significant difference between before and after interference with 5-Aza-cdR in SiHa,Helm,and Caski cell lines(P0.05).The 5-Aza-cdR treatment could suppress cell proliferation.Conclusions The RAR-? gene expression defects play an important role in the carcinogenesis of cervical cancer.Aberrant methylation in promotor region of RAR-? gene may be an important mechanism for the loss of expression of RAR-? gene.

OBJECTIVETo explore the effect of Bushen Gujin Recipe (BGR) on serum and synovial expression of interleukin-1 (IL-1) and tumor necrosis factor-alpha (TNF-α) in knee osteoarthritis (KOA) model rabbits.

METHODSTotally 36 8-month-old healthy male New Zealand white rabbits were randomly divided into 4 groups, i.e., the normal control group, the model group, the Western medicine group (Meloxicam, at the daily dose of 6 mg/kg), and the TCM group (BGR, at the daily dose of 53 g/kg), 9 in each group. Modeling was performed in all rabbits except those in the normal control group by using Hulth A method. All medication was performed for 8 consecutive weeks. Contents of IL-1 and TNF-α were detected using ELISA from serum, partial synovial tissue of the front knee joint, cartilage and subchondral bone of the medial femoral condyle.

RESULTSThe joint space became narrowed in the Western medicine group, ranging between the model group and the TCM group. The articular surface was rough with obvious osteophytes. The joint space was slightly narrower in the TCM group; the articular surface was slightly rough with mild osteophytes. Compared with the normal control group, contents of IL-1 and TNF-α in serum and synovial increased in the model group (P < 0.01). Compared with the model group, contents of IL-1 and TNF-α in serum and the synovial fluid decreased in the two treatment groups (P < 0.01). There was no statistical difference in contents of IL-1 and TNF-α between the Western medicine group and the TCM group.

CONCLUSIONBGR promoted the synthesis of cartilage matrix and carti- lage repair through inhibiting the secretion of IL-1 and TNF-α, and prolonging cartilage degeneration.

Animals ; Drugs, Chinese Herbal ; pharmacology ; therapeutic use ; Interleukin-1 ; metabolism ; Knee Joint ; Male ; Osteoarthritis, Knee ; drug therapy ; metabolism ; Rabbits ; Synovial Fluid ; Synovial Membrane ; metabolism ; Tumor Necrosis Factor-alpha ; metabolism

Objective To explore the imageologic characteristics of pelvic fractures with artery injuries and the treatment methods for embolization of arteries.Methods From January 1999 to June 2005,60 cases(42 males and 18 females)aged 21-52 years(average 34.5 years)with pelvic fractures and unsteady blood dynamics were admitted into our hospital.There were 32 cases with traffic injury,13 with crushing injury,nine with fall injury and six with other injuries.The mean injury severity score was 39?16(16-66).All cases were hypetensive with systolic blood pressure less than 90 mm Hg on the arrival.Routine X-ray examination of dorsaventral,debouch and porch of pelvis was performed.The aver- age amount of blood transfusion was 2 886 ml.All cases underwent iliac artery angiography and pelvic ar- teriography.Results X-ray examination of pelvic fractures showed posterior pelvic fracture in 25 ca- ses,with 64 branches of blood vessels injured;anterior pelvic fracture in 13,with 17 branches of blood vessels injured;acetabular fracture in six,with 12 branches of blood vessels injured;and combined pel- vic fracture in 16,with 36 branches of blood vessels injured.Three cases died,with mortality rate of 5%.One case with common arterial thrombosis was treated with artificial blood vessel transplantation, four cases with external iliac artery injuries including one with artery rupture were treated with prosthesis, and among the three cases with external iliac artery thrombosis,one was treated with dislodgment of thrombosis,one treated with recanalization of thrombolysis and one did not give any treatment.Fifty cases with injury and bleeding of internal iliac artery and its branches were treated with arterial embolization. Five cases showed no obvious injury.Conclusions The types of artery injuries can be predicted through X-ray of pelvic fracture.Posterior pelvic fracture may easily cause injury to superior gluteal arter- ies,iliac lumber arteries,and lateral sacral arteries.While anterior pelvic fracture will cause injury to obturator arteries.Superior gluteal artery is susceptible to injury.Embolization of injured arteries and an- astomosis are preferred treatment for pelvic arterial disruptions.

Abstract: - （ ） ， Work related musculoskeletal disorders WMSDs are common occupational diseases in construction workers which have a high prevalence rate and involve a large number of construction workers. WMSDs affect daily work and quality of life of ， patients leading to absenteeism and burden. The main body parts of construction workers suffering from WMSDs are lower back/ ， ， ， ， ， waist neck shoulder knee elbow and hand/wrist and most of the patients are complicated in multiple sites. The prevalence ， of WMSDs varies by site with the lower back/waist being the most common sites. The influencing factors of WMSDs in （ ， ， ， ， ， construction workers mainly include individual factors age years of work gender smoking status sleep habits physical ， ）， （ ， ， ， fitness and physical exercise etc. occupational factors work load job type working posture work organization and ， ） management working environment and social psychological factors. The incidence of WMSDs is the result of multiple factors. ， ， Therefore tertiary prevention is the key to the prevention and control of WMSDs especially the etiological prevention. Chinese ， construction industry is in the period of rapid development and the demand of construction workers is large. It is urgent to carry out epidemiological and intervention studies on WMSDs for construction workers to guide the formulation of relevant guidelines and measures for prevention and control of WMSDs.

Abstract: - （ ） ， Work related musculoskeletal disorders WMSDs are common occupational diseases in construction workers which have a high prevalence rate and involve a large number of construction workers. WMSDs affect daily work and quality of life of ， patients leading to absenteeism and burden. The main body parts of construction workers suffering from WMSDs are lower back/ ， ， ， ， ， waist neck shoulder knee elbow and hand/wrist and most of the patients are complicated in multiple sites. The prevalence ， of WMSDs varies by site with the lower back/waist being the most common sites. The influencing factors of WMSDs in （ ， ， ， ， ， construction workers mainly include individual factors age years of work gender smoking status sleep habits physical ， ）， （ ， ， ， fitness and physical exercise etc. occupational factors work load job type working posture work organization and ， ） management working environment and social psychological factors. The incidence of WMSDs is the result of multiple factors. ， ， Therefore tertiary prevention is the key to the prevention and control of WMSDs especially the etiological prevention. Chinese ， construction industry is in the period of rapid development and the demand of construction workers is large. It is urgent to carry out epidemiological and intervention studies on WMSDs for construction workers to guide the formulation of relevant guidelines and measures for prevention and control of WMSDs.

Abstract: - （ ） ， Work related musculoskeletal disorders WMSDs are common occupational diseases in construction workers which have a high prevalence rate and involve a large number of construction workers. WMSDs affect daily work and quality of life of ， patients leading to absenteeism and burden. The main body parts of construction workers suffering from WMSDs are lower back/ ， ， ， ， ， waist neck shoulder knee elbow and hand/wrist and most of the patients are complicated in multiple sites. The prevalence ， of WMSDs varies by site with the lower back/waist being the most common sites. The influencing factors of WMSDs in （ ， ， ， ， ， construction workers mainly include individual factors age years of work gender smoking status sleep habits physical ， ）， （ ， ， ， fitness and physical exercise etc. occupational factors work load job type working posture work organization and ， ） management working environment and social psychological factors. The incidence of WMSDs is the result of multiple factors. ， ， Therefore tertiary prevention is the key to the prevention and control of WMSDs especially the etiological prevention. Chinese ， construction industry is in the period of rapid development and the demand of construction workers is large. It is urgent to carry out epidemiological and intervention studies on WMSDs for construction workers to guide the formulation of relevant guidelines and measures for prevention and control of WMSDs.