Objective To analyze the multiple factors affecting the postoperative mechanical ventilation supporting time of chil-dren with congenital heart diseases ,and to preferably master the offline period and offer intervention techniques about shortening mechanical ventilation supporting time and improving efficacy .Methods A total of 217 with congenital heart diseases in 2012 from January to October were retrospectively studied to seek the factor affecting the duration of ventilation .The factors including the age ,weight ,cardiopulmonary bypass time(CBP) ,aortic cross-clamping time(ACC) ,preoperative albumin ,preoperative pulmonary infection ,preoperative pulmonary artery pressure ,postoperative complications were analyzed by the stepwise Logistic regression . Results The ventilation supporting time was 0 .5 -312 .0 h ,average(28 .42 ± 2 .99)h .Multivariate stepwise Logistic analysis showed that the postoperative complications ,preoperative pulmonary infection and CPB were mechanical ventilation use time of the main influence factors .Conclusion Postoperative complications ,preoperative pulmonary infection and CPB are the main influencing factors of mechanical ventilation supporting time .

Objective: To study the ionic diffusion and the distri bu tion character in the interfacial area of aurogalvano form ceramic crown, and t o discuss the bond mechanism of porcelain fused to 99.9% gold. Method s: The ionic diffusion and the distribution character in the interfac ial area of aurogalvano form ceramic crown were observed by electron probe and scanning electron microscope. Results: The examination wit h electron microprobe showed that from gold to porcelain aluminum ascended from zero to peak value, aurum dropped from the peak value to zero, and the bandwidt h was about 3～4 ?m.There were obvious mechanical table and tuber. C onclusion: There is ionic diffusion and no crack in the interfacial a rea;there are physical and chemical combinations between porcelain and 99.9% gol d.

Perepherial blood lymphocytes from normal donors were isolated by Haemonetice V50 Ampheresis System, and incubated in RPMI 1640 contained 1000U/ml rIL-2 and 10%AB serum at 37癈, 5%CO2. Five days later, these cells were harvested and tested their LAK activity. Then 10 patients with malignant metastases were treated by transfer of allo-LAK cells. After 2 and 6 months, the PEL from patients were seperated for the test of response to IL-2, proliferation to ConA and production of IL-2. The result showed that no significantly reducing of these value after patients being treated by Allo-LAK cells. Combined with clinical observation and pathological biopsy, it was concluded that GVHD couldn't be caused by transfer 6f allogenic LAK cells.

Objective:To investigate the effect of sintering temperature on the shrinkage and microstructure of dental fluorosilicic mica glass-ceramic with two different particle size. Methods:Fluorosilicic mica glass powder with average particle diameter of 72.8 ?m was named PO and that with average diameter of 4.5 ?m was named Pm. PO and Pm were molded by cool isostatic pressing technique and then sintered at different temperatures between 600-1 000 ℃. The shrinkage and microstructure of the sintered blocks of PO and Pm were systematically compared with each other. Results:The shrinkage of PO and Pm blocks were all increased as the temperature ascended. However, the shrinkage curves were distinctly different. At the same sintering temperature the shringkage of Pm was larger than that of PO. Moreover, the turning points of temperature (reflecting transition of the sintering mechanisms) of Pm was higher than that of PO. The microstructure observation showed that sintering at 950 ℃ resulted in mica crystal in glass-ceramics and the best compactness of the sintered blocks of both PO and Pm. Conclusion:Sintering glass powder of smaller particle size at 700-850 ℃ may achieve better sintering compactness.

Objective To study the clinical and pathological characteristics, treatment results and prognosis of primary parotid non-Hodgkin's lymphoma (NHL). Methods All of our 21 patients received operative resection first and were histologically comfirmed as having T-cell (intermediate grade) and 20 B-cell lineage (2 high grade, 6 intermediate grade ,12 low grade) including 7 mucosa-associatied lymphoid tissue (MALT) phenotype. Ann Anbor stages were 16 stage Ⅰ E and 5 stage Ⅱ E lesions. All patients were treated by radiotherapy,of them 11 were also given 2～6 cycle chemotherapy. Results The overall 5-year survival rate was 77.0%. All 5 patients who died did so of distant involvement. Conclusions Our data show that MALT lymphoma can be present as a primary paroid NHL,although it is not included in the Working Formulation. Low-dose radiotherapy is of choice in the treatment. Patients with intermediate or high grade NHL should be given multi-modality therapy.

To investigate the effects of different surface conditioning methods on the shear bonding strength of glass-infiltrated ceramic to dentine, 24 glass-infiltrated ceramic testing-pieces were divided into four groups randomly. Among them 3 groups were treated with A(sandblasting+silance), B(etching+silace) or C(silance), separately, while group D was set as the control. Bonding the ceramic pieces to dentine with Super-Bond and the shear bonding strengths was measured. The results showed that the shear bonding strength of group D was lower than that of group A, B and C (P0.05). It is suggested that surface conditioning using combined sandblasting with silance can remarkbly improve the shear bonding strength of glass-infiltrated ceramic to dentine.

Objective To screen for nonresponding cases of superficial transitional cell carcinoma of the bladder at an early stage of intravesical bacillus Calmette Guetin(BCG) therapy. Methods IL 8 and urine pH were assayed both before intravesical BCG instillation and after the 1st and 6th instillation for 32 cases of superficial transitional cell bladder cancinoma following TURB or partial cystectomy.Urinary IL 8 was measumed by chemiluminescence enzyme immunomeric assay and urine pH by routine examination.The result was studied with reference to the clinical outcome of the patients. Results All the patients have been followed up for 6～25 months with tumor recurrence in 5.Urinary IL 8 in these 5 dropped to 161.3?64.5 ng/L after the 1st instillation whereas it was 579.4?77.8 ng/L in the others ( P

objective: To study the metal ceramic bond of reused surplus alloy of a precious metal ceramic alloy. Methods: The samples in control group for reused surplus alloy were treated by only remelting without adding any fresh alloy up to four generations, those in the test group by adding one third fresh alloy in each generation and up to four generations. Metal ceramic bond strength of the samples was surveied by pull shear test. Results: In control group, the pull shear bond strength (MPa) from generation Ⅰto Ⅳcastings was 47.53?2.02, 33.23?2.03, 25.08?1.88 and 14.61?1.56 respectively( P

Objective: To investigate the influence of repeated infiltrating on the microstucture of In-Ceram alumina substrate. Methods:6 disks of aluminum oxide with the height of 3 mm and diameter of 12 mm were perpared and infiltrated with infiltrating glass for 0～5 times for each disk respectively.The fractured surfaces of the samples were observed by scanning elctron microscope. Results:After sintering,a net -shaped porous coping of alumina was formed. The glass infiltration resulted in a dense ceramic mass. The porous coping matrix was infiltrated with low-viscosity glass in void.3-time-infiltration resulted in the best results. Conclusion: With repeated infiltrating firing,the micro-stucture of In-Ceram alumina substrate may become a dense mass.

Objective To explore the distribution and development characters of the accidental injury and death in urban residents in Chifeng city.Method The data came from the annals of death caused by illness or injury and of the demography of the residents from Hongshan district of the Chifeng city(urban area),Ningcheng county(rural area) and Balin You Banner(pasturing area) during 2001-2003.The causes of the death were classified with ICD-9.Results The mortality of the accidental injury during 2001-2003 were 14.17/100 000 in urban area,48.13/100 000 in rural area and 38.02/100 000 in pasturing area,respectively;and which accounted for 5.63%,10.42% and 9.83% of the total deaths,respectively.The death caused by accidental injury ranked the top 5th in urban and rural areas,and the 4th in pasturing area.The main cause for the potential life losing was traffic accidents of the motor vehicles for men and suicides for women.The mortality of the accidental injury in urban and rural residents of over 20 s yrs was higher,and it was higher in male that in female.Conclusion The main causes for the death of the residents in Chifeng city were traffic accidents,suicides and accidental poisoning.It is necessary to adopt correspond measures and make prevention for it according to the epidemic and different ages and sex characters.