In order to study and appraise the application of artificial dermis in repairing skin defect or organization damage, 20 patients underwent artificial dermis transplantation at the Department of Burn and Plastic Surgery, Beijing Jishuitan Hospital from January 2008 to April 2009 were collected. Patients with skin damage or depth portion organization (tendon, joint and bone appears externally) was perform debridement and artificial dermis transplantation, followed by split thickness autoskin transplantation. The survival of artificial dermis and split thickness autoskin was observed. After transplantation, the depth portion organization of patients were covered efficiently, all grafts survived without obvious scar proliferation. The results demonstrated that the prompt application of artificial dermis can reduce the surgery risk, relieve the surgery to damage, and reduce the scar production in repairing organization damage or depth portion organization expose.

Objective To compare the effectiveness of enteral nutritional emulsion (TPF-D) and enteral nutritional emulsion (TP) in patients with chronic wound and diabetes (CWD). Methods Totally 20 CWD patients in Beijing Jishuitan Hospital from June 2008 to June 2010 were enrolled in this study. Enteral nutritional emulsion (TP) was used for the first 5 days ( TP group) and enteral nutritional emulsion (TPF-D) was used for the second 5 days (TPF-D group). Changes of mean amplitude of glycemic excursions (MAGE), insulin dosage, and prealbumin (PA) were compared between TPF-D group and TP group. The adverse effects and post-operational complications were also observed. Results The every-day MAGE was (2. 56 ±0. 35) mmol/L in TPF-D group, which was significantly lower than that in TP group [ (3.23 ± 0. 42) mmol/L] ( P = 0. 01 ). The mean insulin dosage was (9.6 ± 1.7) U in TPF-D group, which was significantly lower than that in TP group [ ( 12. 2 ± 2. 5 ) U ] ( P =0.03 ). The increase of PA showed no significant difference between TPF-D group [ ( 12.7 ± 3. 3) mg/L] and TP group [ ( 13.4 ± 2. 8 ) mg/L ] ( P = 0. 08 ). No enteral nutrition-related adverse effect or post-operation complication was noted. Conclusion Compared with TP, TPF-D is more suitable for the CWD patients.

Objective To explore the psychometric properties of the Chinese version of integrated visual and auditory continuous performance test (IVA-CPT) ,and to assess the diagnosis value of the Chinese version of IVA-CPT in two samples of children with attention deficit hyperactivity disorder (ADHD) in clinic and school.Methods 112 participants were divided into 4 groups:clinic group, clinic control group, school group and control group from school.The participants were measured by IVA-CPT and the results were compared.Results ①The integrated quotients of IVA-CPT had concordance with the dimensions of the DSM-ⅣV and ASRS.Each integrated quotients of IVA-CPT and each dimension of the DSM-ⅣV and ASRS were negatively correlated(school: r=-0.277, P＜0.05;clinic: r=-0.423, P＜0.05).The score of HI dimension was negatively correlated with integrated attention quotient and integrated inhibition quotient of IVA-CPT (r=-0.480, P＜0.01;r=-0.452, P＜0.01).② The results of the IVA-CPT and the comprehensive assessment had consistency for diagnosis of children with ADHD from the total subjects,the clinic ,and the school.And there were no difference between the sensitivity, the specificity, the coincidence rate, the missed diagnosis rate and the misdiagnosis rate of IVA-CPT when used to diagnose children with ADHD in clinic and school(x2=3.396, P＞0.05).③The IVA-CPT evaluation system had good stability according to the retest of a random sample of 25 subjects(P＜0.01).The pretest and posttest results of each full quotients of IVA-CPT were significantly correlated (P＜0.01).Conclusion The IVA-CPT not only can be used as auxiliary diagnostic tools to diagnose children with ADHD in clinic,it can be used as auxiliary diagnostic tools to diagnose children with ADHD in the community.

Objective To explore the nutrition risk,undemutrition rates,and nutrirlon support in the hos-pitalized patients with respiratory disorders.Methods Totally 100 hospitalized patients in department of respirato-ry medicine of our hospital from October to December 2008 were enrolled in this study.The nutrition risks were screened on the next day after admission and then two weeks later using Nutrition Risk Screening(NRS2002).Body mass index(BMI)lower than 18.5 ks/m2,serum albumin(sALB)lower than 35 g/L,or pre-ALB was lower than 20 g/L Wag regarded as undemutrition.Results Among all these 100 patients evaluated by NRS2002,59 patients were judged at the risk of malnutrition and 54 patients developed undemutrition two weekB later The nutrition risk and undernutuition rate among non-ambulatory patients were 87.7%and 82.9%,which were signifi-cantly higher than in ambulatory patients(32.2%and 30.5%)(P<0.001).The nutrition risk and undernutu-ition rate were also significantly higher in patients who stayed in the hospital for more than 2 weeks than those for less than 2 weeks(75.0% vs 9.4%and 66.2% vs 21.9%,respectively)(P<0.001).Twenty-two patients received nutritional support.The ratio of parenteral nutrition and enteral nutrition wag 1.2:1.Conclusions NRS2002 can be used in the nutrition assessment in hospitalized patients with respiratory disorders.Non-ambulato-ry and a hospital stay of more than 2 weeks increase the nutritional risk and undemutrition rate.Only a small per-centage of patients receive nutritional support.

Objective To evaluate the influence of peritoneal transport characteristics on nutritional status of peritoneal dialysis patients and estimate the role of peritoneal transport characteristics and nutritional status in evaluation of peritoneal dialysis adequacy. Methods Peritoneal transport properties (D/Pcr) were evaluated by Short Peritoneal Equilibration Test and then 53 cases were divided into high transport group (D/Pcr ≥0. 65) and low transport group (D/Pcr < 0. 65). Urea kinetics (Kt/v) and total clearance of creatinine (TCcr) were calcu- lated. Serum albumin (ALB), prealbumin, transferring (TF), hemoglobin (Hb), lean body mass (LBM) and LBM% were examined or calculated. Subjective global assessment (SGA) was used to evaluate the nutritional sta- tus of patients. Results There were 30 cases in high transport group and 23 cases in low transport group. D/Pcr (0. 82±0.15 vs. 0. 55±0. 08, P < 0. 01), TCcr (62. 93%±25. 98% vs. 49. 69%±16. 92% , P < 0. 05) and age were significantly higher in high transport group than those in low transport group, while ALB, TF, Hb, LBM% , and SGA were significantly lower than those in low transport group (P < 0.05). ALB was negatively cor-related with Kt/v (r= -0.2708, P<0. 05). Conclusions High peritoneal transport patients have better solute clearance but worse nourishment status compared with low transport ones. Nutritional status is one of the factors to evaluate dialysis adequacy. Nutrition management and guidance should be strengthened for the continuous ambula- tory peritoneal dialysis patients, especially for the elderly ones.

Objective To study the mechanism of glutamine dipeptide on wound healing after operations on bums. Methods Totally, 30 burned patients were randomly divided into study group and control group (15 cases in each group). All patients received parental nutrition support after operation. Study group patients were supplemented with glutamine dipeptide at a dose of 0. 5 g ·kg-1· d-1. The plasma free hydroxyproline level was measured by a standard amino acid analyzer 1 day before operation and 7 days after operation and the wound healing time was recor- ded. Results The plasma free hydroxyproline levels of both groups were higher than the normal values before opera- tion but without significant difference [control group: (2. 24±0. 84) μg/ml, study group: (2. 32±0.92) jig/ml, normal value: (1.27±0.44) μg/ml]. On the post-operative 7 day, the plasma free hydroxyproline level of study group [ (4. 31±1. 05) ng/ml] was significantly higher than that of control group [ (3. 04±1. 01) μg/ml] (P = 0.002). The wound healing time of study group [ (29. 7±5.3) d] was shorter than that of control group but with- out significant difference [ (33. 3±7.5) d, P = 0. 14 ]. Conclusion The intravenous supplementation of glutamine dipeptide may increase the plasma hydroxyproline level after operation and thus promote wound healing.

Objective To investigate the relations of the expression of bcl-xL in superficial bladder tumor and prognosis. Method The expression of bcl-xL was detected by envision system in 80 cases of superficial bladder tumor. Results In patients with high expression of bcl-xL, the recurrence rate was higher than that of normal expression [71.4%(30/42) vs 50.0%(19/38) ,P < 0.05], and the recurrence of time as early as normal expression [(16.0 ± 1.2) months vs (36.0 ± 4.5) months](P < 0.05). Conclusion The expression of bcl-xL could effectively predict the prognosis of patients with bladder tumor, those who with high expression of-bcl-xL have bad prognosis.

Objective To investigate the effect of low molecular weight heparin (LMWH) on the expression of endothelial protein C receptor (EPCR) and protease activated receptor 1 (PAR1) in abdominal vascular endothelial cells (VECs) of septic rats. Methods VECs were cultured by tissue-sticking method, and the purity was determined with flow cytometry (FCM). VECs were randomly divided into three groups: control group, septic group (LPS 1 μg/ml) and LMWH group (LPS 1 μg/ml+LMWH 5 μg/ml). The VECs were collected at 1st, 3rd, 5th days after stimulated. The expression of EPCR and PAR1 were assessed by FCM. Results The expression of EPCR and PAR1 of septic group decreased significantly compared with control group at each time point (P＜0.05 or P＜0.01), and the expression decreased most obviously on day 5 (26.53±7.21 vs 39.26±2.62,q＝6.45,P＜0.01;53.21±15.10 vs 86.54±11.34,q＝6.94,P＜0.01). In LMWH group, the levels of EPCR and PAR1 expression were higher than setpic group at each time point (P＜0.05). Compared to control group, the expression of EPCR had a significantly decrease on day 1 (40.86±1.63 vs 45.41±2.82,q＝3.51,P＜0.05), which had no significantly different on day 3 and 5 (41.20±3.32 vs 42.83±2.66,P＞0.05;39.23±3.33 vs 39.26±2.62,P＞0.05), and the expression of PAR1 were not significantly decrease compared with control group at each time point (P＞0.05). Conclusions LMWH could improve the inhibition status and the expression of EPCR and PAR1 on VECs in septic rats.

Fracture problem of orthodontic wires was discussed in this paper. The calculation formulae of bending stress and tensile stress were obtained. All main factors that affect bending stress and tensile stress of orthodontic wires were analyzed and discussed. It was concluded that the main causes of fracture of orthodontic wires were fatigue and static disruption. Some improving proposals for preventing fracture of orthodontic wires were put forward.
Dental Alloys ; Elasticity ; Equipment Failure Analysis ; Mechanics ; Orthodontic Wires ; Tensile Strength

Objective: To investigate the role of T cell in the antitumor immune responses induced by MIF gene-modified tumor vaccine. Methods: MIF gene was transferred into FBL3 erythroleukemia cel l by adenovirus carrier and a new type of tumor vaccine was prepared. The chang es of the number and the function of T cell in spleen and lymph node was observe d. Results: After the mice were immunized with MIF gene-m odified FBL3 vaccine, the number of lymphocyte in spleens and lymph nodes increa sed markedly and the specific CTL activities of splenocytes also increased great ly. FACS analysis showed that the CD3+,　CD4+,　CD8+ T cells and CD28 posi tive cells in draining lymph nodes of MIF-FBL3 group mice increased more marked ly than that of control groups. When the wild type FBL3 cells were injected into the mice immunized with MIF gene-modified FBL3 vaccine, the growth of tumors w ere obviously inhibited and the survival rate of the mice was increased. Conclusion: It is suggested that MIF gene-modified tumor vaccine can induce specific antitumor immune responses mediated by T cells and may be a candidate for gene therapy of tumor.