Determination of SCE frequency, chromosomal aberration and micronucleus rate of cultured peripheral lymphocytes of 38 miners who worked in the well, and 40 non-miners who worked outside the well in Dachang Area and 27 other workers who didn't work and live there (as control group) was carried out. The result showed that the miners had higher SCE incidence and chromosomal aberration rate. The nonmining workers and the control group had much lower rates. There was a significant difference between the miners and non-miners or control group, but no statistically differences were found between the non-miners and the control group. Micronucleus rate among the miners, the non-miners and the control group were all the same level statistically. We proposed that some toxic substances in the Dachang Tin Mine might be respousible for the genetic damages in the miners. We suggested that a combined assay of SCE with chromosomal aberration or micronucleus might be a good screening method for the high risk population such as the miners in Dachang Tin Mine.

Apoptosis is involved in a variety of physiological and path ol ogical conditions. Bax is proapoptotic member in signal pathway of apoptosis. It will contribute to the survival of cells if reducing its expression and activit y. Advances in factors influencing Bax, biological effects induce d by Bax knock-out, and antisense nucleotides targeted to Bax-mRNA were r eviewed in this article during recent years.

0.05). Significant differences of post-operative VA, time of retinal detachment, and neurepithelial thickness were found (P0.05). Conclusions The time of retinal detachment and post-operative VA in patients with retinal detachment relate to the neurepithelial thickness detected by OCT. When the duration of retinal detachment becomes longer, the macular neurepithelium becomes thicker, the histomorphological changes increase, and the post-operative VA decreases.

Objective To get more detailed information about the microsurgery of the Willis circle,in order to provide evidence of clinical operation.Methods The microsurgical anatomy of the Willis circle via combined frontotemporal-orbitozygomatic approach was studied in 5 adult cadaver brains under microsurgical scope. Results The Willis circle was composed of anterior communicating artery (ACOA), A 1 segments of the right and left anterior cerebral arteries (ACA), right and left internal carotid arteries(ICA) right and left, posterior communicating artery (PCOA), Pi segments of the right and left posterior cerebral arteries (PCA).The variation are present obviously in A 1 segment of the ACA. The outer diameter of left A 1 segment are larger than that of right ones. There are many perforating arteries of each part of Willis circle. Most of them arise from their original arteries, then course medial-superiorly to the optic tract, the pituitary stalk, the optic chiasm, the thalamus, hypothalamus, the floor of third ventricle, basal nuclei and internal capsule etc blood supplied areas. Conclusion To understand the microsurgical anotamy of the Willis circle and protections against its penetrating branches perfectly are the key to gain a good curative effect during the concerned operation .

Objective To investigate the effect of salbutamol aerosol combined with magnesium sulfate on IL-2, IL-4, IL-5, IFN-γand T lymphocyte subsets in pediatric asthma patients.Methods 38 pediatric asthma patients were selected and randomly divided into control group and experimental group.Control group was treated by clinical routine method.Experimental group was treated by salbutamol aerosol combined with magnesium sulfate.The IL-2, IL-4, IL-5, IFN-γ, T lymphocyte subsets, blood pressure, heart rate, respiratory and clinical effects were observed and compared.ResuIts Compared with control group, the serum levels of IL-2 and IFN-γwere higher(P<0.05).The IL-5, IL-4 level were lower(P<0.05).The CD3 +, CD4 +, CD4 +/CD8 +level were higher(P<0.05).The serum CD8 +were lower(P<0.05).The total efficiency were higher(P<0.05).ConcIusion Salbutamol aerosol combined with magnesium sulfate can effectively regulate T lymphocyte subsets proportion and cytokine levels in asthmatic children, enhance immunity, and improve the clinical symptoms.

Objective To evaluate the efficacy and safety of two kinds of dosage of 5-aminosalicylic acid zinc enteric-coated capsule in treatment of active ulcerative colitis (UC). Methods The muhicentre, double blind, dosage reaction and contrast trial was conducted in six hospitals during March 2004 to Sep. 2004. One hundred and eight patients with UC were randomly allocated into the high dosage (n= 36, 1 g, bid) and the low dosage (n = 36, 0.5 g, bid) of 5-aminosalicylic acid zinc enteric-coated capsule groups, and the Olsalazine sodium group (n = 36, 1 g, tid) with a 8-week treatment. The efficacy and adverse events of 5-aminosalicylic acid zinc enteric-coated capsule were evaluated based on the clinical presentations and endoscopic findings. Results The clinical efficacy was 68.97% in high dosage group, 45. 45% in low dosage group and 62.86% in Olsalazine sodium group with no significant difference (P>0. 05). The endoscopic examination showed that the healing rate of UC in high dosage group and low dosage group was 51.72% and 21.21%, respectively, whereas the efficacy rate was 82.76% and 69.70% respectively. The results showed that high dosage was more effective than low dosage (P=0.023), but was similar to Olsalazine sodium (healing rate of 34.29% and effective rate of 88.57% ,P>0. 05). Diarrhea was main adverse event, which was accounted for 2.8% (1/36) in high dosage group and 2.8% (1/36) in the Olsalazine sodium group. There was no adverse event in low dosage group. Conclusions 5-aminosalicylic acid zinc enteric-coated capsule is an effective agent in treatment of UC, especially in high dosage. It is similar to Olsalazine sodium in treatment of UC, and has advantages in reducing medication times.

BACKGROUND: Establishment of individual femoral model can describe the stereochemical structure of femoral accurately,which is conductive to measuring femoral anatomic forms. This model possesses unified standard, and removing the potential confounding factors, thus, it is more suitable for biomechanical test.OBJECTIVE: To explore a method for establishing an accurate individual femoral model.METHODS: A male, healthy, volunteer was selected from General Hospital of Tianjin Medical University, and the cross section of femur was successive scanned by 16 slice CT. In accordance with Dicom 3.0 standard, the CT image was reconstructed using Mimics software to establish the space model, and UG software was used to type on the workpiece, and cimatron software was used to sort, then set the coordinate system of computer numerical control machining, clamp and correct the workpiece to produce mold toolpath, so the mold was established. The femur model made by mould was compared with the femur by the method of point cloud.RESULTS AND CONCLUSION: An individual femur model was produced. The comparison results of point cloud showed that error was in allowing range. This is an advisable method to make a femoral model, which can achieve predetermined requirement.

Objective To evaluate the multi-slice spiral CT (MSCT) features of crush pulmonary parenchymal injuries in the massive Wenchuan earthquake. Methods One hundred and seventeen patients with crush pulmonary parenchymal injuries in the massive Wenchuan earthquake were reviewed, the location, extent and MSCT appearances of the injuries and associated thoracic injuries were evaluated. The MSCT appearances of the injuries on 1 d, 2--5 d and 6--14 d were compared using Chi-square test. Results One hundred and thirteen patients had pulmonary contusion and bilaterally in 70 cases, 7 had pulmonary laceration. A total of two hundreds and eighty-three lung lobes were involved and 3 or more lobes involved in 47 patients. Ill-defined patchy opacity was detected in 75 patients, associated ground-glass opacity (GGO) in 24 cases. Lung laceration presented as pneumatocele in 4 cases and demarcated hematoma in 3 cases. Coexisted rib fractures were detected in 98 patients and flail chests were in 29 patients. Forty-three patients had coexisted fractures of scapula, clavicle and (or) sternum. Ninety-nine patients had coexisted pleural injuries. Conclusions Crush pulmonary parenchymal injuries in the Wenchuan earthquake are severe. The bilateral, multifocal and multiple lobes involved injuries with a high incidence of coexisted other severe thoracic injuries are the noticeable features.

Clinically, atrial fibrillation (AF) is one of the most common cardiac arrhythmia, and patients with arterial fibrillation carry high risk of stroke. Oral administration of anticoagulation such as warfarin for the prevention of stroke has some risks to induce bleeding; moreover, some patients are not able to tolerate the medication. Percutaneous occlusion of the left atrial appendage is safe and effective for the prevention of stroke in patients with atrial fibrillation, although at present it is only used for the patients who have contraindications to anticoagulation medication. This paper aims to review a variety of left atrial appendage occlusion devices and to analyze the relationship between the different shape design of occluder and the left atrial appendage morphology.

Objective To apply 360 degree evaluation in competence assessment of community general practice trainers.Methods The 360 degree evaluation questionnaire was designed by authors and the evaluation was applied to assess the personal comprehensive quality,competence in general practice and teaching of 16 general practice trainers in Fenglin Community Health Service Center of Shanghai Xuhui District.Results The scores of personal comprehensive quality,competency in general practice and teaching were 7.73 ± 0.73,6.91 ± 0.91 and 6.44 ± 1.38,respectively.The total scores from different evaluators were 6.93 ± 0.12 for peers,6.68 ± 0.74 for hospital executives,8.17 ± 0.12 for nurses and 6.43 ± 0.89 from self evaluation (F =27.91,P =0.000).Conclusion The variance between different evaluators in 360 degree evaluation can avoid bias of single one.The results of 360 degree evaluation show that the teaching ability of community general practice trainer is relatively low,suggesting the training of teaching ability should be strengthened for these trainers.