Objective To evaluate the efficacy and side-effects of 595 nm pulsed dye laser (PDL) in the treatment of cutaneous vascular diseases.Methods We analyzed 572 cases of cutaneous vascular diseases treated with 595 nm PDL retrospectively and compared the efficiency among different type of diseases.Results There were totally 243 cases of infantile hemangioma,186 cases of port wine stain,69 cases of telangiectasis,42 cases of spider angioma and 32 cases of rhinophyma.The efficiency was 93.8％,54.3％,95.7％,100％ and 56.3％,respectively,with 2.27％ of side-effect rate.The efficacy was correlated to age,type and location of the diseases.Conclusions 595 nm PDL is a safe option for cutaneous vascular diseases with high efficacy and low side-effect rate.

Objective To propose the nursing measures with the analysis of free tissue transplant donor site poor healing.Methods 19 cases which suffered wound poor healing were analysed and gived donor site expansion training strengthen,nutrition support,reduce the tension of incision to reduce the incidence of complications.Results 19 cases which suffered wound poor healing with free tissue transplantation were all delayed healed.The reasons could be summed up in four aspects as high tension incision,incision liquefaction,incision hematoma,infection of incision.Conclusions Predictive nursing intervention,postoperative close observation of incision condition,early treatment can effectively prevent complications of donor site.

Objective To evaluate the clinical effects of partial fascicle from the ulnar nerve to biceps branch of musculocutaneous nerve to treat brachial plexus injury. Methods Six cases of brachial plexus injury were involved in this group.3 cases were upper trunk injury and 3 cases were accompanied partial lower trunk injury.A partial fascicle of ulnar nerve transfered to repair biceps branch underwent in all cases,phrenic nerve or accessory nerve were transfered to repair suprascapular nerve.The mean time from injury to surgery was 2.8 months.Patients were evaluated with regard to elbow flexion and should abduction ansle,grip strengthen,morbidity of ulnar nerve function lose. Results Five cases out of six got follow up.The mean period of follow-up was 18 months(range from 9-30 months).The average reinnervation time for the biceps muscle was 3.3 months. All the patients' recovery of elbow flexion Was M_3~+-M_5; and the shoulder adduction was 90°-180°;the grip strength was not downgraded. No notable impairment of the donor site nerve function was observed in 4 cases,just 1 case with a little more fascicle been harvested had partial ulnar nerve impairments. Conclusion The use of ulnar nerve partial fascicle to biceps branch combined with phrenic nerve or accessory nerve to suprascapular nerve to reconstruct upper roots avulsion of the brachial plexus is a valid and convenient procedure.It can obtain good functional restoration in elbow flexion and shoulder adduction in a resonable time.The cases with partial lower trunk injury of brachial plexus,the partial fascicle of ulnar nerve can still be used for repair the musculocutaneous nerve.

Objective To investigate the effect of perforator identification before DIEP flap dissection for the patient with abdominal scar.Methods Preoperative multidetector-row computed tomography angiography was used to identify that the dominant perforators of the abdominal wall were not damaged completely.During the second stage breast reconstruction operation,the located dominant perforator and the DIEP flap were dissected.Results The dominant perforator located by MDCTA was identified with the exploration in operation.Follow-up for half a year,the flap survived well and the patient was satisfied with the appearance.Conclusion Abdominal scar was not the definite contraindication for DIEP flap.MDCTA provided a good quality evaluation of the perforator vessels.The located dominant perforator was dissected to confirm the blood supply of the DIEP flap.Identification of perforator can be used as a routine preoperative evaluation for patients with scar on donor site.

Objective To explore the therapeutic effects of the folic acid,vitaminB12on Helicobacter pylori(Hp)-negative patients with chronic atrophic gastritis(CAG).Methods we enrolled 67 patients who were diagnosed as CAG of Hp-negative from the First Affiliated Hospital of Xi′an Medical University.The patients were divided into control group and treatment group. Control group were given routine treatment(pepsin tablets), treatment group were given routine treatment and folic acid,vitaminB12. Then respective compared the folic acid, vitaminB12,clinical symptoms scores,gastroscopic scores and histopathological scores in the two groups before treatment and after treatment of 12 weeks and 24 weeks.Results After treatment of 12 weeks,there were signifi-cant differences in the gastroscopic scores and histopathological scores(activity),folic acid,vitaminB12status (P<0.05);no significant difference existed in clinical symptoms scores,histopathological scores(chronic inflam-mation,atrophic,intestinal metaplasia)between the two groups(P > 0.05). After treatment of 24 weeks,the differences of clinical symptoms scores,gastroscopic scores,histopathological scores(chronic inflammation, activity,atrophic,intestinal metaplasia)and folic acid,vitaminB12status were significant(P < 0.05);no significant difference existed in histopathological scores(intestinal metaplasia)between the two groups(P >0.05). Conclusion Folic acid and vitaminB12can improve the clinical symptoms and histological situation of the Hp-negative patients with CAG,worthy of further popularizing in clinic.

Objective To establish reference ranges of venous blood cell parameters in Lanzhou area ,through investigating 1 880 cases of healthy people .Methods Retrospective analysis method was adopted ,and changes of 26 venous blood cell parameters were observed by using Sysmex XE‐5000 automatic hematology analyzer .Results Some parameters ,including platelet(PLT) and hemo‐globin(Hb) ,were close to normal distribution ,while most of parameters were skewed distribution .In the 6 parameters of white blood cells ,except for percentage of lymphocyte and neutrophi ,the 95% CI of the rest of parameters had statistically significant differences between male and female(P<0 .05) .In the 8 parameters of red blood cell ,except for mean corpuscular haemoglobin con‐centration (MCHC) and standard deviation of red blood cell volume distribution width (RDWSD) ,the 95% CI of the rest of parame‐ters had statistically significant differences between male and female (P<0 .05) .The 95% CI of PLT related parameters and per‐centage of juvenile cells had no statistically significant differences between male and female (P>0 .05) .In some parameters ,there were significant differences between 95% CI observed in this study and reference ranges currently used .Conclusion There are sig‐nificant differences between 95% CI of these parameters and original reference ranges ,so the original reference ranges are lack of ac‐curacy and applicability ,which indicates that it is necessary to scientificlly and rationally establish reference ranges of blood cell in region .

OBJECTIVETo study the influence of different shape of lower jaw on stress distribution at bone interface in the mandibular molar region of implant restoration models.

METHODSSix models with different lower jaw shapes were constructed by using three-dimensional finite element method. Implant-bone interface stresses in these models were studied under vertical and lateral loads.

RESULTSNo matter in the condition of vertical loading of lateral loading, stress distribution patterns were similar in variant models and differences of stress values were not statistically significant. The maximal differences in Von-Mises stress, compressive stress and tensile stress among the six models were 6.4%, 2.8% and 6.2%respectively.

CONCLUSIONIt is rational to simplify the lower jaw shape in finite element analysis.

Dental Implantation ; Dental Models ; Dental Prosthesis Design ; methods ; Dental Stress Analysis ; methods ; Female ; Finite Element Analysis ; Humans ; Male ; Mandible ; anatomy & histology

Objective:To investigate the effect of resveratrol (Res) on the fat synthesis in the liver cancer HepG2cells, and to elucidate its possible mechanism.Methods:The HepG2cells were cultured in vitro and divided into Res group (treated with 40μmol·L-1 DMSO-diluted Res for 24h) and control group (treated with the same concentration of DMSO for 24h) .The cell supernatant was collected, and the levels of triglyceride (TG) and total cholesterol (TC) in the cells in various groups were measured by ELISA.The mRNA and protein expression levels of lipase synthase acetyl-CoA carboxylase (ACC1) , fatty acid synthetase (FASN) and stearoyl-CoA desaturase (SCD1) in the cells in various groups were detected by qRT-PCR and Western blotting method.The levels of O-linked N-acetylglucosamine (O-GlcNAc) glycosylation in the cells in various groups were detected by Western blotting method.Results:Compared with control group, the levels of TG and TC in the cells in Res group were decreased, but the difference was not statistically significant (t1=1.886, P＞0.05;t2=2.457, P＞0.05) .Compared with control group, the levels of expressions of ACC1, FASN and SCD1mRNA and proteins in the cells in Res group were significantly decreased (P＜0.05or P＜0.01) ;the O-GlcNAc glycosylation level in the cells in Res group was significantly decreased (t=2.87, P＜0.05) .Conclusion:Res has the effect of inhibiting the fat synthesis in the liver cancer HepG2 cells.Its mechanism may be related to the reduction of cellular O-GlcNAc glycosylation level and the reduction of the expression of FASN.

Objective Comparison of induction time on the proliferation of induced adipose-derived stem cells (ADSC) to differentiate into Schwann-like cells (iSC).Methods From March,2017 to October,2018,ADSCs were isolated from inguinal adipose tissue of healthy adult female SD rats.Flow cytometry was performed to detect ADSC positive markers CD29,CD90 and negative marker CD45.iSC induction medium was used to culture ADSC.S-100 and GFAP were detected by immunofluorescence staining to confirm that ADSC had differentiated into iSC.Morphological changes of cells were observed by inverted microscope on day 1st,4th,7th,10th,13rd,16th and 19th after induction.MTS assay was used to evaluate cell proliferation ability.Tunel staining was applied to assess cell apoptosis.Results Both S100 and GFAP were expressed in iSC.On day 7th,the cell proliferation rate was significantly slower than that before induction (A value was 0.330±0.020 vs.0.400±0.004,P＜0.05).It was negatively correlated with induction time.On day 19th,the proliferation rate of iSC was lower than 50％ of the proliferation rate before induction (A value was 0.016±0.003 vs.0.400±0.004,P＜0.05).Apoptosis of iSC was more obvious than ADSC at the same time point.Conclusion The proliferation ability of ADSC-induced iSC is optimal within 7 days after induction.

Objective:To introduce an improved method for reconstruction of thumb by transplanting partial second toe combined with hallucis flap.Methods:Since April, 2015 to December, 2019, 12 thumbs were reconstructed by transplanting partial second toe combined with hallucis flap. The average age of the patients was 28.5 years old. The severity of thumb defect was grade III-V. The compound tissue flap of common vascular pedicle was obtained from the hallux and the partial second toe of the contralateral foot, according to the condition of the defect of thumb. The hallucis flap was rotated transversely and connected with the partial second toe. Make up the characteristics and defects for the reconstructed thumb. The remaining skin and soft tissue of the second toe and the donor area were tiled to cover the wound. The patients were followed-up regularly.Results:All of the 12 transplantations completely survived. Postoperative follow-up period ranged from 6 to 26 months, 14 months in average. Appearances of all reconstructed thumbs and the donor toes was satisfactory. According to the Functional Assessment Criteria of the Upper Limb set by the Hand Surgery Society of Chinese Medical Association, the outcomes were graded excellent in 9 cases and good in 3 cases. All patients were able manage daily activities and living independently. Shape and function of donor foot were good.Conclusion:Part of the second toe combined with the hallucis flap transfer for thumb reconstruction may effectively improve the appearance of the reconstructed thumb. The reconstructed thumb is symmetrical, good in shape and satisfactory in function.