Objective To explore the treatment opportunity of mechanical ventilation for acute severe organophosphorus pesticide poisoning patients with respiratory failure.Methods According to the different indications of mechanical ventilation,115 acute severe organophosphorus pesticide poisoning patients with respiratory failure were divided into the observation group A (40 cases),the observation group B(38 cases)and the control group(37 cases).The cure rate,aspiration pneumonia incidence,duration of mechanical ventilation,length of hospital stay of the three groups were analyzed.Results The cure rate of the observation group A(97.5％) was significantly higher than that of the control group(83.4％)and the observation group B (92.1％) (P ＜ 0.05 or P ＜ 0.01) ;The aspiration pneumonia of the observation group(2 cases) was significantly less than that of the control group(8 cases)(P ＜ 0.05) ;The hospitalization time [(4.46 ± 0.51) d,(7.11 ± 0.83) d] and the duration of mechanical ventilation [(55.40 ± 5.24)h,(79.47 ± 2.44) h] of the observation group A and the observation group B were significantly shorter than those of the control group [(10.40 ± 1.12) d,(100.30 ± 2.15) h] (all P ＜ 0.01) ; The hospitalization time and the duration of mechanical ventilation of the observation group A [(4.46 ± 0.51) d,(55.40 ± 5.24) h] were significantly shorter than those of the observation group B [(7.11 ± 0.83)d,(79.47 ± 2.44)h] (all P ＜ 0.01).Conclusion Respiratory rate ≥30 times/min and ＜ 34 times/min or ≤ 10 times/min,or spontaneous breathing weakened,and blood gas analysis prompted hypoxemia(60 mm Hg ＜ PaO2 ≤ 70 mm Hg)is best opportunity of mechanical ventilation for acute severe organophosphorus pesticide poisoning patients with respiratory failure.

BACKGROUND: Compared with normal physiological flap, main advantage of venous skin flap is that it throws off the limitation of arterial vascular territory on donor site and recipient site of traditional axial skin flap. However, its survival rate is unstable. OBJECTIVE: To explore effects of basic fibroblast growth factor (bFGF)-poly(lactic-co-glycolic-acid)] (PLGA)-sustained release microspheres on the survival of rabbit venous flaps.DESIGN, TIME AND SETTING: A randomized controlled animal study was performed at the University of South China from May to October 2008.MATERIALS: A total of 24 healthy New Zealand rabbits were equally randomly assigned to bFGF-PLGA sustained release microsphere, blank microsphere and blank control groups.METHODS: The formulation of bFGF microspheres was optimized by orthogonal design. bFGF-PLGA microspheres were prepared by optimized method. Lateral abdominal wall skin flap was created in rabbits from 3 groups. Five days before operation, 28.85 g/L bFGF-PLGA microspheres 3 mL (containing bFGF 20 μg) was intradermally injected into rabbits from the bFGF-PLGA sustained release microsphere group. An equal volume of blank microsphere + bFGF was injected in the rabbits of the blank microsphere group. Rabbits from the blank control group were infused with the same volume of saline. MAIN OUTCOME MEASURES: Morphology and particle distribution of bFGF-PLGA microspheres, drug loading volume, encapsulation efficiency, in vitro drug release characteristics were measured. After seven days, the survival area of skin was determined. Rabbit skin samples received CD34~+ immunohistochemical staining to detect the expression of CD34~+ and average number of blood vessels. RESULTS: The bFGF microsphere prepared based on optimized formulation exhibited well-defined properties, with the even and uniform sphere in appearance, regular particles without adhesion, about 98% of particles with a size distribution between 12.50 to 43.49 μm, with a mean particle size of 26.93μm and size span of (0.611 ± 6.60). The drug loading volume and encapsulation efficiency of bFGF microsphere reached [(23.11 ±0.44 )x10~3]% and (86.51±0.83)%, respectively. In the burst release phase, the rate of in vitro drug release amounted to 27.78%, but rose to 81.56% accumulatively 30 days later. The in vitro drug release of bFGF microsphere corresponded with Higuichi equation (r= 0.997). The sustained-release microspheres, blank microspheres and normal saline group, the average survival of the flap and the average number of blood vessels were similar (P=0.597, P=0.336), but still significantly lower than the bFGF-PLGA sustained release microsphere group (P=0.000). Results of immunohistochemical staining revealed that bFGF-PLGA promoted blood supple between flap and surroundings, improved flap survival and abundant CD34~+ expression. CONCLUSION: bFGF microsphere with good morphology, high drug loading volume and encapsulation efficiency can be obtained using W/O/W multiple emulsion evaporation method. The bFGF microsphere can promote the survival of rabbit venous flaps through a long period due to sustained release of bFGF.

The article is to study the status of academic communications,providing useful exploration to enhance the scientific research ability of postgraduate students.In the base of summing up the forms of the internal and external multi-level academic communications,we point out varies of problems existing inall levels.The level and publicity of some academic communications are poor; the postgraduate students' participation is not powerful enough; the guide form supervisors and graduate management are in shortage. These factors are restricting the role of academic communications in training postgraduate's research ability.Therefore,we should take some appropriate improvements.The effect of academic communications in training graduate students' research ability should be enhanced via improvements at various aspects.

BACKGROUND: The soft tissues would shrink with nasal framework collapse following surgical trauma, which cause aseptic inflammation, lead to parts of cartilage resorption. Accordingly, long-term saddle nose deformity usually accompanied by short nasal columella. Complications such as skin perforation or ulceration would appear if corrected the deformity using medical silicone rubber with large tension.OBJECTIVE: To explore the effectiveness of repairing post-traumatic saddle nose deformity with autologous costal cartilage transplantation.METHODS: A total of 21 cases with post-traumatic saddle nose deformity accompanied by short nasal columella were selected, including 6 males and 15 females, aged 16 45 years. All of the cases had trauma history and agreed with the treatment. The costal cartilage was obtained from the seventh rib and formed to babylon weeping willow leaf shape and columella nasi stent to repair post-traumatic saddle nose deformity. The "V-Y" progradation suture was used in the philtrum introcession and the botton of nasal columella to extend the nasal columella. The recovery of saddle nose deformity after transplantation, discharge of transplanted cartilage, as well as the incision scar status was observed.RESULTS AND CONCLUSION: The results were satisfactory and there were no complications after transplantation. All the cases were followed up from 6 months to 2 years. No case suffered costal cartilage grafts discharge or chondral deformation. The scar was little at the bottom of nasal columella. It is an ideal method for repairing post-traumatic saddle nose deformity using transplantation of autologous costal cartilage with "V-Y" progradation suture.

Objective:To evaluate the clinical effect of combination of autologous tissue reconstruction of tarsal plate with temporal flap on repair of full-thickness lower eyelid defect.Methods:Eleven patients (11 eyes) underwent hard palate mucosa or ear cartilage combined the emporal flap with the orbicularis oculi muscle to repair full-thickness defect ofpalpebra inferior.Of the 11 patients,6 had more than 75％ eyelid defect area,and 5 had more than 50％ eyelid defect area.Results:All 11 eyes closed completely,with no entropion or ectropion,and returned to normal basically.Postoperative follow-up was performed for 6 months to 5 years,3 years and 4 months on average.The function and form of eyelid remained stable.Infection,leakage or contracture was not found on reconstruction tarsus.Conclusion:Reconstruction of eyelid with autogenous hard palate mucosa or ear cartilage combined the emporal flap with the orbicularis oculi muscle is a simple,convenient and effective method.

BACKGROUND:Compared with normal physiological flap,main advantage of venous skin flap is that it throws off the limitation of arterial vascular territory on donor site and recipient site of traditional axial skin flap.However,its survival rate is unstable.OBJECTIVE:To explore effects of basic fibroblast growth factor (bFGF)-[poly(lactic-co-glycolic-acid)] (PLGA)-sustained release microspheres on the survival of rabbit venous flaps.DESIGN,TIME AND SETTING:A randomized controlled animal study was performed at the University of South China from May to October 2008.MATERIALS:A total of 24 healthy New Zealand rabbits were equally randomly assigned to bFGF-PLGA sustained release microsphere,blank microsphere and blank control groups.METHODS:The formulation of bFGF microspheres was optimized by orthogonal design.bFGF-PLGA microspheres were prepared by optimized method.Lateral abdominal wall skin flap was created in rabbits from 3 groups.Five days before operation,28.85 g/L bFGF-PLGA microspheres 3 mL (containing bFGF 20 ?g) was intradermally injected into rabbits from the bFGF-PLGA sustained release microsphere group.An equal volume of blank microsphere + bFGF was injected in the rabbits of the blank microsphere group.Rabbits from the blank control group were infused with the same volume of saline.MAIN OUTCOME MEASURES:Morphology and particle distribution of bFGF-PLGA microspheres,drug loading volume,encapsulation efficiency,in vitro drug release characteristics were measured.After seven days,the survival area of skin was determined.Rabbit skin samples received CD34+ immunohistochemical staining to detect the expression of CD34+ and average number of blood vessels.RESULTS:The bFGF microsphere prepared based on optimized formulation exhibited well-defined properties,with the even and uniform sphere in appearance,regular particles without adhesion,about 98% of particles with a size distribution between 12.50 to 43.49 ?m,with a mean particle size of 26.93 ?m and size span of (0.611 ? 6.60).The drug loading volume and encapsulation efficiency of bFGF microsphere reached [(23.11?0.44)?10-3]% and (86.51?0.83)%,respectively.In the burst release phase,the rate of in vitro drug release amounted to 27.78%,but rose to 81.56% accumulatively 30 days later.The in vitro drug release of bFGF microsphere corresponded with Higuichi equation (r=0.997).The sustained-release microspheres,blank microspheres and normal saline group,the average survival of the flap and the average number of blood vessels were similar (P=0.597,P=0.336),but still significantly lower than the bFGF-PLGA sustained release microsphere group (P=0.000).Results of immunohistochemical staining revealed that bFGF-PLGA promoted blood supple between flap and surroundings,improved flap survival and abundant CD34+ expression.CONCLUSION:bFGF microsphere with good morphology,high drug loading volume and encapsulation efficiency can be obtained using W/O/W multiple emulsion evaporation method.The bFGF microsphere can promote the survival of rabbit venous flaps through a long period due to sustained release of bFGF.

Objective To clone and study the antimicrobial-resistant gene in Neisseria gonorrhoeae.Methods The gene library,which contains the differential genes of antimicrobial resistant strains and stan-dard reference strains of Neisseria gonorrhoeae,was constructed using a technique known as suppression subtractive hybridization(SSH).Then the antimicrobial resistance associated genes were cloned and ana-lyzed.Results Subtractive gene library in antimicrobial-resistant Neisseria gonorrhoeae was successfully constructed,which contains2500positive clones.Sequence analysis was performed on5clones.The se-quences of these five clones were unknown previously.Conclusions The subtractive DNA library is succes-sively constructed which may provide an important clue for studying the mechanism of antimicrobial resis-tance in Neisseria gonorrhoeae.

Objective To study the role of the outer membrane protein Rmp of Neisseria gonor-rhoeae strain in immunosuppression and the strategy of eliminating it .Methods The rmp gene of Neisseria gonorrhoeae strain was amplified by PCR and inserted into pMD 19-T vector .The recombinant vector pMD 19△rmp∷Kan containing Kan and the 5′-and 3′-flanking regions of rmp (△rmp∷Kan) was constructed by replacing 200 nucleotide residues of pMD 19-rmp with kanamycin resistance gene Kan and transformed into Neisseria gonorrhoeae WHO-A strain.PCR and Western blot assay were used to screen and identify the re-combinant mutant strains that could not express Rmp .Mice were immunized with mutant strains and bacteri-cidal activities of the immune sera were detected by antibody-mediated complement-dependent cytotoxicity assay.Results The mutant strains that could not encode Rmp were successfully constructed .Antibodies in-duced by mutant strains showed stronger bactericidal activity against Neisseria gonorrhoeae in comparison with those induced by wild strains .Conclusion The recombinant Neisseria gonorrhoeae strain with rmp gene de-letion might eliminate the immunosuppressive effects of Rmp expressed in wild gonococcal strains , which provides a reference for further development of novel live attenuated whole-cell vaccines of Neisseria gonor-rhoeae.

Objective To assess the effect of ultrasound-guided percutaneous 125I seed implantation for the treatment of osteolytic metastases. Methods From February 2011 to December 2013, a total of 18 patients with advanced cancer complicated by osteolytic metastases received ultrasound-guided percutaneous implantation of 125I seeds. According to visual analog score (VAS) the pain was estimated before and 3 days as well as one month after the treatment. One month after the treatment follow-up CT scan was performed in all patients to check the tumor size and the distribution of 125I seeds, and the therapy was repeated if necessary. The efficacy was evaluated according to Response Evaluation Criteria in Solid Tumors (RECIST). Results A total of 33 times of procedure were carried out in the 18 patients. Three days after the treatment, local pain was obviously relieved in all cases. Compared with preoperative VAS, the postoperative VAS was significantly improved (P=0.000). The pain was well controlled even one month after the treatment (P=0.000). One month after the last treatment the complete remission (CR) rate was 0% (n=0), partial remission (PR) rate 61.1% (n=11), stable disease (SD) 33.3% (n=6) and progress disease (PD) 5.6% (n=1), and local control rate (CR+PR) was 61.1%. No severe brachytheray-related complications occurred. Conclusion Ultrasound-guided percutaneous 125I seed implantation brachytherapy is technically simple and repeatable, it can safely and effectively guide the performance of percutaneous 125I seed implantation for the treatment of osteolytic metastases. Even in the circumstance of not using TPS, this technique can also obtain satisfactory local control rate and significant pain relief.

Objective:To explore effects of trehalose as a cryopreserve agent on survival rate of fatty tissue after cryopreservation.Methods:The liposuction was used on the abdomen of adult female.After centrifugation and purification,adipose was randomized into the following three groups,the trehalose group,the fetal bovine serum (FBS)+ 10％DMSO group and the physiological saline group.The specimens were cryopreserved at-196 ℃ for 3 months and then the HE staining,glucose transfer method and CK method were used to detect the cell survival rate in each group.Results:The activity of adipose in the trehalose group and FBS+10％DMSO group adipose was higher than that in the physiological saline group (P＜0.05);while there was no significant difference between the trehalose group and FBS+10％DMSO group (P＞0.05).Conclusion:As cryoprotectant,trehalose could keep fat cell viability,and adipose tissue can be used for clinical transplantation after 3 months' freezing.