Objective To compare the effect of spinal anesthesia by using 0.75% ropivacaine or 0.5% bupivacaine in a simulated state of rocking naval vessels, in order to choose an optimal anesthetic agent in a rocking naval vessels at sea. Methods Eighty patients undergoing elective surgery of abdomen or lower limb were randomly divided into 4 groups (n=20). Namely, horizontal level with 0.75% ropivacaine control group (R1), horizontal level with 0.5% bupivacaine control group (B1), simulated rocking with 0.75% ropivacaine group (R2), simulated rocking with 0.5% bupivacaine group (B2). The effect of anesthesia, the changes in hemodynamics and the incidence of relevant side-effects were determined and compared among the four groups. Results The anesthetic level (analgesic level) of group B2 was 2.7 segments higher than that in group B1, and the durations for fixed level was longer than group B1 (P

The effects of hypertonic saline solution (HS) on prostacyclin (PGI2) and endothelin (ET) were evaluated.30 patients under epidural anesthesia during elective operations were infused with 7.5% HS (n=20) or 5% dextrose (n=10) 4ml/kg before anesthesia.PGI2, ET and hemodynamic indices were measured before and 10, 60 min after infusion.In HS group, the PGI2 increased about 51.4%, ET decreased 49.6% and the aortic compliance increased 37.5%. However.after dextrose infusion, PGI2 increased about 23.7% at 60 min, ET increased but dispersedly, with increased TPR and decreased CO, SV.Systolic pressure were declined over 20% in four out of ten patients.It demonstrated that HS could stimulate the secretion of PGI2 and depress ET. These hormonal changes revealed an important role in the course of decreasing TPR, with improving hemodynamios.

Objective:Study on a kind of meet the war wounded, public emergency safety, first aid and transportation of severely injured patients with safe, simple, and without lifting height of the liquid infusion apparatus. Methods:The negative pressure of transfusion bag from the eletrical air pump transfusion (blood) pipe extrusion, The transfusion apparatus weight, bubble, drop speed, sound, light alarm device parameters input to the control system by the sensor, according to the parameters set to safely complete transfusion or stop. Steps:Infusion apparatus mounted on the liquid and the transfusion pipe for infusion after stetting the number of drops of liquid infusion, the remaining parameters such as. Results:Infusion apparatus can be placed in any position, the peripheral infusion tube length range without the suspension liquid device and changing the existing infusion (blood) products and procedures, which create convenient, comfortable infusion conditions without position limitation The controllable range of the infusion speed is 50ml-1000ml/h,which can monitor the infusion and the air in the pipeline, liquid flow rate, the remaining amount, According to the set alarm timely and automatically stop the transfusion. Conclusion:To improve the safety of transfusion, save human resources. and it’s dual-use, small volume, easy to carry.

AIM: To explore the effect of receptor tyrosine kinase system mediated by phosphotyrosine phosphatase (PTP) on tau phosphorylation in rat hippocampus. METHODS: Pervanadate (PVN), inhibitor of PTP or inhibitor of glycogen synthase kinase-3 (GSK-3), LiCl were injected into rat hippocampus by stereotaxy technique. The level of tau phosphorylation was detected by Western blot and immunohistochemistry after 24 h of injection. RESULTS: PVN significantly inhibited tau phosphorylation at PHF-1 epitope and the inhibition of tau phosphorylation by PVN was stronger than that of LiCl (P

Objective To investigate the effects of dexmedetomidine on oxidative stress response after operation in patients with acute craniocerebral trauma. Methods Sixty patients who underwent intracranial hematoma and decompressive craniectomy within 24 h after acute craniocerebral trauma,were randomly divided into midazolam group and dexmedetomidine group(n=30). All patients were maintained seda-tion for 12 h after operation. Mean arterial blood pressure (MAP),heart rate (HR),blood glucose,S-100B protein (S-100B),malond-ia1ehyde(MDA) and superoxide dismutase (SOD) were recorded at the end of operation(T0),3 h(T1),6 h(T2),12 h(T3) after opera-tion. Results Postoperative MAP, HR and blood glucose were stability in two groups. MAP, HR and blood glucose of dexmedetomidine group were lower than those of midazolam group(P<0. 05). The serum concentrations of S-100B and MDA gradually reduced,and the serum levels of SOD gradually increased at T1 ~T3 in two groups. Compared with midazolam group, these changes were significantly higher in dexmedetomidine group(P<0. 05). Conclusion Dexmedetomidine can protect the brain by maintaining haemodynamic stability and attenu-ating oxidative stress response after operation in patients with acute craniocerebral trauma.

BACKGROUND: Most scholars believed that injured vertebral body needs to be fixed in the open surgery of thoracolumbar vertebral fractures; however, it is unclear whether injured vertebra needs to be fixed in the minimaly invasive surgery. OBJECTIVE: To investigate the clinical outcomes of minimaly invasive percutaneous self-dilating pedicle in repair of injured vertebral fixation in thoracolumbar vertebral fractures. METHODS: Totaly 36 patients with thoracolumbar vertebral fractures without nervous system injury who received treatment in Honghui Hospital, Xi’an Jiaotong University Health Science Center from February 2013to February 2014 were enroled and divided into injured vertebral fixation and cross-injured vertebral fixation groups (n=18/group). Patients in these two groups were al subjected to minimaly invasive percutaneous self-dilating pedicle treatment. The injured vertebral body, upper, and lower vertebrae of injured vertebral body were fixed in injured vertebral fixation group, and the upper and lower vertebrae of injured vertebral body was fixed in cross-injured vertebral fixation group. RESULTS AND CONCLUSION: Compared with the injured vertebral fixation group, the cross-injured vertebral fixation group had smaler incisions, less intraoperative blood loss, less operation tine and intraoperative X-ray fluoroscopy time (P < 0.05). After one year of internal fixation, the anterior vertebral height, anterior vertebral height percentage and kyphotic Cobb angle of patients in these two groups improved compared with those before internal fixation (P < 0.05), but there were no significant differences in anterior vertebral height percentage, kyphotic Cobb angle and Oswestry disability index between these two groups (P > 0.05). These results demonstrate that anterior vertebral height cross-injured vertebral fixation has the similar clinical effect with injured vertebral fixation, but cross-injured vertebral fixation had more advantage in the operation. Therefore, there is little significance of conducting injured vertebral fixation in the surgery of minimaly invasive percutaneous self-dilating pedicle in repair of thoracolumbar vertebral fractures.

Objective To explore the clinial value of airbronchogram in diagnosis of peripheral lung cancer (diameter≤3). Methods Comparing study between thin section CT and pathology was done on 174 nodules (129malignant and 45 benigin) in 150 patients. Results Thin section CT showed 30 cases (23%) of airbronehogram in nodules,only seen in bronchioalveolocarcinoma, adenocarcinoma and squamous cell carcinoma (significance difference). Conclusion Airbronchogram in peripheral small nodules was a certain sign of malignant nodule. The sign suggested diagnosis of histologic types in lung center.

Naturally occurring mutations in surface proteins of Hepatitis B virus(HBV)usually result in altered hepatitis B surface antigen(HBsAg)secretion efficiency.In the present study,we reported two conserved residues,M75 and M103 with respect to HBsAg,mutations of which not only attenuated HBsAg secretion(M75 only),but also suppressed HBV genome replication without compromising the overlapping p-gene product.We also found M75 and M103 can initiate truncated surface protein(TSPs)synthesis upon over-expression of full-length surface proteins,which may possibly contribute to HBV genome replication.However,attempts to rescue replicationdefective HBV mutant by co-expression of TSPs initiated from M75 or M103 were unsuccessful,which indicated surface proteins rather than the putative TSPs were involved in regulation of HBV genome replication.

Protein phosphorylation is one of the most common post-translational modification processes that play an essential role in regulating protein functionality.The Helicoverpa armigera single nucleopolyhedrovirus (HearNPv) orf2-encoded nucleocapsid protein HA2 participates in orchestration of virus-induced actin polymerization through its WCA domain,in which phosphorylation status are supposed to be critical in respect to actin polymerization.In the present study,two putative phosphorylation sites (232Thr and 250Ser) and a highly conserved Serine (245Ser) on the WCA domain of HA2 were mutated,and their phenotypes were characterized by reintroducing the mutated HA2 into the HearNPV genome.Viral infectivity assays demonstrated that only the recombinant HearNPV bearing HA2 mutation at 245Ser can produce infectious virions,both 232Tbr and 250Ser mutations were lethal to the virus.However,actin polymerization assay demonstrated that all the three viruses bearing HA2 mutations were still capable of initiating actin polymerization in the host nucleus,which indicated the putative phosphorylation sites on HA2 may contribute to HearNPV replication through another unidentified pathway.

Protamines are a group of highly basic proteins first discovered in spermatozoon that allow for denser packaging of DNA than histones and will result in down-regulation of gene transcription[1].It is well recognized that the Autographa californica multicapsid nucleopolyhedrovirus (AcMNPV) encodes P6.9,a protamine-like protein that forms the viral subnucleosome through binding to the viral genome[29].Previous research demonstrates that P6.9 is essential for viral nucleocapsid assembly,while it has no influence on viral genome replication[31].In the present study,the role of P6.9 in viral gene transcription regulation is characterized.In contrast to protamines or other protamine-like proteins that usually down-regulate gene transcription,P6.9 appears to up-regulate viral gene transcription at 12-24 hours post infection (hpi),whereas it is non-essential for the basal level of viral gene transcription.Fluorescence microscopy reveals the P6.9's co-localization with DNA is temporally and spatially synchronized with P6.9's impact on viral gene transcription,indicating the P6.9-DNA association contributes to transcription regulation.Chromatin fractionation assay further reveals an unexpected co-existence of P6.9 and host RNA polymerase Ⅱ in the same transcriptionally active chromatin fraction at 24 hpi,which may probably contribute to viral gene transcription up-regulation in the late infection phase.