Objective To evaluate the value of ultrasound-guided nasotracheal intubation in the patients undergoing oral maxillofacial surgery by comparing with blind intubation.Methods Forty ASA physical status Ⅰ or Ⅱ patients of both sexes,aged 18-75 yr,weighing 45-90 kg,scheduled for elective oral maxillofacial surgery,were randomly divided into blind intubation group (group B,n =20) and ultrasound group (group U,n =20) according to a random number table.Nasotracheal intubation was performed after routine topical analgesia and conscious sedation.The front end of catheter was adjusted to the aditus glottidis according to the sound of respiratory air,and tracheal intubation was placed when the strongest inspiratory phase appeared in group B.A linear array probe (frequency 7-15 MHz) was used,and the images of glottis expansion and wired catheter insertion were visualized in the thyroid cartilage window in U group.Before intubation and at 0,1,3 and 5 min after successful intubation,mean arterial pressure (MAP),HR and SpO2 were recorded.The development of responses to intubation was recorded during intubation.The successful intubation at first attempt,the number of intubation,intubation time,and postoperative complications such as sore throat or hoarseness were recorded.Results Compared with group B,the number of intubation was significantly reduced,intubation time was shortened,the rate of successful intubation at first attempt was increased,the failure rate of intubation and incidence of sore throat and hoarseness were decreased,and no significant changes were found in the parameters of hemodynamics and incidence of responses to intubation in group U.No intraoperative awareness of intubation occurred in patients.Conclusion Compared with blind intubation,ultrasound-guided nasotracheal intubation can raise the probability of successful intubation at first attempt,reduce the number of intubation,and shorten intubation time,and it is safe and convenient and provides significant value clinically for the patients undergoing oral maxillofacial surgery.

To increase the biotransfomation efficiency from the orotic acid to the uridine 5'-monophosphate(UMP),URA5 gene encoding orotate phosphoribosytransferase was amplified from Saccharomyces cerevisiae BY4742 by PCR,then it was inserted into the expression vector pYX212(contained orotidine monophosphate decarboxylase gene URA3)and the pYX212-URA5 was transformed into Saccharomyces cerevisiae BJX12 by electroporation.The recombinant strain was elementarily used to convert orotic acid to UMP.The results showed that pYX212-URA5/BJX12 could accumulate 7mmol/L UMP from 32mmol/L orotic acid in 26h,significantly higher than both control groups pYX212/BJX12(2.7mmol/L) and BJX12(2.4 mmol/L).

Objective To explore the relationship between TLR3 mRNA expression on peripheral blood mononuclear cells(PBMCs)and acute rotavirus(RV)diarrhea.Methods Sixty-one children with acute RV diarrhea served as study subject,the expression of TLR3 mRNA on PBMCs was detected by real-time fluorescence quantitative RT-PCR.the concentrations of IFN-γand TNF-α in serum were measured by the method of Enzyrme-linked immunosorbent assay(EUSA).Results The expression of TLR3 on PBMCs and the serum levels of IFN-γ and TNF-α in the serious diarrhea group were 0. 820±0.051,(33.67±12.88)Pg/ml, (62.21±14.65)pg/ml,respectively,while it were 0.717±0.040,(24.01±10.06)pg/ml,(50.99± 12.18)pg/ml in the slight diarrhea group,and 0.525±0.029,(12.52±5.19)pg/ml,(28.65±7.44)pg/ml in the control group.Compared with the control group.the expression of TLR3 on PBMCs and the serum levels of IFN-γ,TNF-α in the serious and slight diarrhea group were significantly higher(P<0.01).There were significant differences between the serious and slight diarrhea group(P<0.01).There were positive relationship between the expression of TLR3 on PBMCs and tHe serum IFN-γ,TNF-α levels(r=0.431,P< 0.05,r=0.372,P<0.05).Conclusion The expression of TLR3 on PBMCs in children with acute rotavirus dialThea iS up-regulated,TLR3 and its mediated immune response are associated with the development of acute rotavirus diarrhea.

Objective:To study the colonization ability of Streptococcus oligofermentans (S.oligofer-mentan)in the condition of high sucrose in oral cavity of rats.Methods:In this study,48 SPF-SD rats aged 21 days were selected.From 24th to 27th days,the rats were fed with water of antibiotic and fed with high glucose diet continuously.On the 28th day,the rats were divided into four groups randomly,12 rats per group.From the 28th day to 30th day,the first group (SMgroup)was inoculated with S.mutans,the second group (SO group)with S.oligofermentan,the third group (SO+SM group)with mixture of S. mutans and S.oligofermentan,the control group not with any bacteria.On the next day and the 10th day after inoculation of bacteria,the samples of dental plaque of the rats were acquired by scrubbing occlu-sal,buccal and lingual surfaces of bilateral mandibular molars with sterile swabs.The samples of SM group were inoculated on MSB and BHIS,of SO group on MSAE,of SO+SMgroup on MSB,MSAE and BHIS,of the control group on MSB and MSAE.S.mutans were screened and calculated on MSB,the suspected colonies of S.oligofermentan were screened and identified by the analysis of 16S rDNA.Re-sults:On the next day,the detection rate of S.oligofermentan was 33.3% (4/12)in the group of SO;in the group of SO+SM,the detection rate of S.oligofermentan was 0,the detection rate of S.mutans 100.00%,and the proportion of S.mutans 14.70%±4.53%;in the group of SM,the detection rate of S.mutans was 100.00%,the proportion of S.mutans 12.42%±4.27%.On the 10th day,in the group of SO,the detection rate of S.oligofermentan was 0;in the group of SO+SM,the detection rate of S.oligofermentan was 0,the detection rate of S.mutans 100.00%,and the proportion of S.mutans 15.78%±5.10%;in the group of SM,the detection rate of S.mutans was 100.00%,and the propor-tion of S.mutans 17.08%±5.75%.Conclusion:In the condition of the experiment where high glucose was maintained in the oral cavity in rats,S.oligofermentan appeared transiently and couldn’t colonize in the rats.

Objective To analyze the effect of Shuxuetong injection on microcirculation in patients with septic shock and its therapeutic effect. Methods A prospective study was conducted. Eighty patients with septic shock treated in Department of Critical Care Medicine of Hebei Provincial Traditional Chinese Medical Hospital were randomly divided into a Shuxuetong group and a conventional therapy group according to random number table, 40 cases in each group. The conventional treatment in the two groups was energetically carried out in accord to the sepsis shock guidelines, such as positive fluid resuscitation, anti-infection, etc. In the Shuxuetong group, additionally Shuxuetong injection 6 mL in 5% glucose injection 250 mL intravenous drip was given once a day for 7 days. The levels of urine output, lactic acid (Lac), blood urea nitrogen (BUN), creatinine (Cr), aspartate aminotransferase (AST), alanine aminotransferase (ALT), left ventricular ejection fraction (LVEF), and cardiac index (CI) in the two groups were observed before and after treatment; the total dosages of dopamine, dobutamine, noradrenaline, etc. vascoactive agent used for the patients and 28-day mortality in the two groups were also recorded. Results The comparisons of levels of urine output, Lac, BUN, Cr, AST, ALT, LVEF, and CI before treatment between the two groups were of no statistical significant differences (all P>0.05). After treatment in the two groups, the urine output, LVEF, and CI were increased compared with those before treatment, whereas the Lac, BUN, Cr, AST, and ALT were significantly decreased, and the changes were more obvious in Shuxuetong group [urine output (mL/h):112.1±39.8 vs. 73.3±28.5, LVEF:0.49±0.15 vs. 0.44±0.14, CI (mL·s-1·m-2):66.2±5.7 vs. 54.2±6.2, Lac (mmol/L):3.83±1.65 vs. 4.72±2.25, BUN (mmol/L):7.1±2.7 vs. 9.3±3.5, Cr (μmol/L): 73.9±16.2 vs. 95.7±15.8, AST (U/L): 39.8±9.5 vs. 45.8±12.7, ALT (U/L):34.3±9.7 vs. 41.7±11.3, all P<0.05]. The total dosages of all kinds of vascoactive agent of Shuxuetong group were remarkably less than those in the conventional therapy group [dopamine (mg): 993.1±261.7 vs. 1 340.9±356.4, dobutamine (mg):776.2±281.0 vs. 1 049.2±364.3, noradrenaline (mg):56.4±34.6 vs. 107.6±51.3, all P<0.05]. The 28-day mortality of Shuxuetong group was obviously lower than that of conventional therapy group [40.0%(16/40) vs. 60.0%(24/40), P<0.05]. Conclusion Shuxuetong injection can improve the microcirculation perfusion in patients with septic shock and reduce their mortality.

Objective To determine the clinical significance of measuring the levels of 25-(OH) vitamin D3 [(25-(OH) D3)],immune globulins and serum alkaline phosphatase(AKP) in children with recurrent community-acquired pneumonia(CAP).Methods Serum samples were collected in children with recurrent CAP (recur-rent CAP group,n =38),first CAP (first CAP group,n =123),and age matched normal children (heath control group,n =39).The 25-(OH) D3 level,IgG,IgM,IgA and AKP levels were measured.Results The serum 25-(OH)D3 concentration of the recurrent CAP group was (47.87 ± 2.28)nmol/L,that of the first CAP group was (84.43 ± 4.12) nmol/L,and that of the heath control group was (91.2 ± 7.85) nmol/L,the differences among the three groups were statistically significant (t =3.716,8.881,all P ＜0.05).The differences of the serum IgA concen tration among the three groups had statistically significant differences (t =4.596,5.319,9.230,all P ＜ 0.05).But the serum IgG concentration among the three groups had no statistically significant differences(t =1.115,1.887,1.090,all P ＞ 0.05).The serum IgM concentration among the three groups had no statistically significant differences (t =0.804,0.942,0.918,all P ＞ 0.05).The serum AKP concentration among the three groups had no statistically signifi cant differences(t =0.277,0.661,0.866,all P ＞ 0.05).The serum 25-(OH) D3 levels in 161 cases of CAP patients were not correlated to any of the levels of IgM,IgG,IgA,or AKP.Conclusion The levels of 25-(OH) D3 and IgA are significantly lower in children with recurrent CAP,indicating that vitamin D deficiency may play a role in the pathogenesis of recurrent CAP.Prophylactic use of vitamin D supplementation may improve the immune function and reduce the development of recurrent CAP in children.

Objective To observe the preventive effect of Anduolin(ADL) on radiation-induced lung injury in mice.Methods Totally 180 of Kunming mice were randomly classified into six groups:normal control group ( N ),irradiation control group ( R),irradiation plus low dose ADL group ( L),irradiation plus middle dose ADL group ( M),irradiation plus high dose ADL group ( H),and irradiation plus Dexamethasone group (D).The mice except group N were irradiated with 20 Gy of 6 MV X-rays on whole lung.The mice in group L,M and H were given with ADL 1 d before irradiation and continued for 6 weeks after irradiation.At 2,4 and 6 weeks after irradiation,the general situation and the lung pathological changes of mice were observed.The lung wet weight,collagen contents of the whole lung tissue,hydroxproline concentration,and TGF-β1 expression in the lung were also delected.Results Compared to the group R,the mice breathing rate,hydroxproline concentration,and TGF-β1 expression in the group L were not significantly changed.While in the groups M,H and D,the breathing rate,the generation of hydroxproline and the expression of TGF-β1 were decreased significantly ( F =2.668-161.646,P ＜0.05).In addition,ADL alleviated the pathological changes on radiation-induced lung injury in mice.Conclusions ADL might have the preventive effect on radiation-induced lung injury in mice.

The nitrite-reducing activity of aerobic denitrifying bacterial strain N6-1 was studied. It showed that the nitrite-reducing activity reached the highest at 30℃, 120 r/min, pH 8.5 and C/N ratio 12, using CH3COONa and NaNO2 as the sole carbon source and nitrogen source, respectively. When the initial NaNO2 concentration was 2 g/L, NO2--N was reduced completely after 20 hours cultivation with the reducing rate of 20.3 mg/L?h. There would be no effect on its nitrite-reducing activity in the present of 1.5% NaCl or 1% peptone. The cell concentration could reach 1.2?1011 CFU/mL after 24 hours cultivation in 10 L fermentor.

Objective To observe the effect of pulsed electromagnetic fields(PEMFs)of different daily treatment durations on biomechanical properties of femur in ovariectomized rats,so as to find out the optimal daily treatment time.Methods Fifty female Sprague-Dawley rats were randomly divided into five groups:(1)SHAM control(no PEMFs treatment),(2)OVX control(no PEMFs treatment),(3)OVX I(PEMFs treatment at 8Hz fre- quency with 3.8 mT intensity,20 min daily for 30 days),(4)OVX 11(PEMFs treatment at 8 Hz frequency with 3.8 mT intensity,40 min daily for 30 days),and(5)OVXⅢ(PEMFs treatment at 8Hz frequency with 3.8 mT in- tensity,60 rain daily for 30 days).All the rats were subject to bilateral overiectomy except those in the SHAM control group.The biomechanical properties of the femur were assessed after 30 days of PEMFs treatment.Results The values of the parameters of the biomechanical properties obtained with the OVX control group were significantly lower than those of the other 4 groups(P0.05).Conclusion PEMFs of the three different daily treatment durations can maintain the biomechanical properties of the femur in ovariectomized rats.Under certain in- tensity(3.8 mT)and frequency(8 Hz),PEMFs of the three different treatment durations can significantly maintain biomechanical properties of femur in ovariectomized rats approximately to the nomal level,but among the three groups,the difference is not significant.It was shown that exposure to PEMFs for 20 to 60 minutes daily had similar effect of maintaining biomechanical properties of the femur in ovariectomized rats.

Objective To establish an simple and convenient animal model of cardiac arrest for studying cerebral resuscitation.Method Clean male Sprague Dawley rats were randomly divided into sham group and experimental group.Cardiac arrest was induced by asphyxiation and ice-cold 0.5 mol KCl with blood flow cut off for 5 minutes.Animals were resuscitated with external cardiopulmonary resuscitation (CPR),mechanical ventilation,and epinephrine injection.Blood pressure,heart rate,successful ratio of resuscitation after 72 hours, time of cardiac arrest (T_(CA)) and return of spontaneous circulation (T_(ROSC)) were recorded.Neural deficit scores (NDS) and levels of maleic dialdehyde (MDA) in plasma were evaluated at 3,6,12,24,48,72 hours after ROSC.The damage score of cortex was measured by transmission electron microscope examination at 3 hours and 72 hours after ROSC.Results All the rats in experimental group had cardiac arrest rapidly.T_(CA) and T_(ROSC) were (137.3?10.2) seconds and (64.4?9.3) seconds,respectively,while the successful rate of resuscitation was 82.5%.The lowest NDS was at 3 hours after ROSC,while the NDS increased gradually.After CPR,the level of MDA in plasma increased significantly,slightly declined at 72 hours after ROSC,but still significantly higher than before the model.Electron microscope examination of cortex showed neuron slightly,organelle and astrocyte,but became better after 72 hours post ROSC.Conclusions The model of cardiac arrest was easy to establish,and the data provided was accurate,which is useful to study the mechanism of cerebral resuscitation.