To investigate the effects of clonidine on controlled hypotension induced by sodium nitroprusside,twenty-four patients (male 17,femai 7,aged 20 to 58 years,ASA Ⅰ to Ⅱ)scheduled for elective craniotomy,were randomly assigned to two groups:control group (Ⅰ,n=12),clonidine group (Ⅱ,n=12) with premedication of clonidine 5?g/kg P. O.. The MAP of both groups decreased by 40% with the infusion of 0.01% sodium nitroprusside solution (SNP). The results showed that the blood pressure was more easily reduced and maitained in group Ⅱ,and the MAP after discontinuing of SNP in group Ⅱ was lower than in group Ⅰ(P

Objective To compare the gas and heat exchange performance of membrane oxygenator DDMO-100S and membrane oxygenator Terumo SX-10 in cardiopulmonary bypass(CPB)in children.Methods 39 children aged 3-12 yrs who suffered from congenital heart disease were selected,and the repair of ventricle septal defect or/and atrial septal defect was performed under cardiopulmonary bypass.The 39 children were randomly divided into Group DD(n =21)and Group SX(n = 18).Membrane oxygenator DDMO-100S(Made by Xi'an Daidai,China)was used in Group DD and Membrane oxygenator Terumo SX-10(Made by Terumo,Japan)in Group SX,respectively.The hypothermic cardiopulmonary bypass with high perfusion flow and the cool crystalloid cardioplegia were applied in all children.The artery blood samples were taken for measuring PO2 and PCO2 and the oxygenating index(OI)was calculated by the formulae(OI = PaO2/FiO2).The temperature at nasal pharynx was monitored and the rewarming time was recorded.Results The total priming volume in Group DD was bigger than in Group SX [(742.5 ± 107.3)ml vs(531.3 ± 84.3)ml,P ＜ 0.05].The PO2,OI and PCO2 at 15 min after CPB or at 5 min before cease of CPB had no differences in both group(P ＞0.05).The rewarming time had no difference in both group [(31.5 ± 10.2)min vs(30.61 ± 8.2)min,P ＞0.05].Conclusions Under our observation condition,the gas and heat exchange performance of membrane oxygenator DDMO-100S were the same as membrane oxygenator Terumo SX-10,when it was used in cardiopulmonary bypass in children,but it had a little bit more priming volume.

Objective To observe the expression and the clinical significance of P 170 and CD 34 in primary acute myeloblastic leukemia (AML)patients.Methods The expression of P 170 and CD 34 was determined by flow cytometry in 30 AML patients.Results The P 170 positive rate was 36.67%,the patients with the P 170 positive expression had higher resistant rate to chemotherapy as compared with P 170 negative group(P

DICOM is a standard for data format and transmission of digital medical image. DICOM Data Set is a binary data stream using DICOM encoding rule. DICOM Nesting Data Set is a kind of complex Data Set with a tree structure, and is widely used in DICOM services and encoding of DICOM files for its special structure. In this article, the functions and encoding rule of Data Set and Nesting Data Set in DICOM format are presented, and the way of parsing and organizing of them is put forward. The realization method and practical application are also discussed.

Objective:To prepare PLGA nanoparticles modified with folic acid conjugated chitosan oligosaccharide containing pa-clitaxel (F-CS-PLGA-NPs) and study the inhibitory effect on SKOV-3. Methods:F-CS-PLGA-NPs were prepared by an interface dep-osition method, 30% ethanol was used as the release medium for the in vitro release profiles of nanoparticles, and MTT was adopted to evaluate the inhibitory effect of paclitaxel with different formulations and concentrations on SKOV-3. Results:The particle size and zeta potential of F-CS-PLGA-NPs was (321 ± 0. 76) nm and (22. 6 ± 0. 26) mV, respectively, the drug loading was (5. 1 ± 0. 25)%, and the encapsulation efficiency was (41. 96 ± 1. 96)%. F-CS-PLGA-NPs had a similar in vitro release profiles with the ordinary nanoparti-cles ( PLGA-NPs) . About 35% of paclitaxel was released from the nanoparticles in the initial 24 h, and then a near zero order release at a relative slow rate was shown, and the cumulative release rate in 144 h was about 75%. The results of cell experiments suggested that at the same paclitaxel concentration, the inhibition effect of F-CS-PLGA-NPs group was stronger than that of the PLGA-NPs group and the solution group. The inhibition effect of F-CS-PLGA-NPs could be reduced by free folic acid. Conclusion:PLGA nanoparticles modified with folic acid conjugated chitosan oligosaccharide can increase the targeting efficiency in SKOVS-3 tumor cells.

Objective To compare the effect of different partition of nucleic acid protein complex on the affinity of enriched library in systematic evolution of ligands by exponential enrichment (SELEX). Methods Two protocols were adopted to select the enriched library to transforming growth factor ? receptor Ⅱ(TGF ? RⅡ). Protocol 1: protein was absorbed on the surface of 96 well plate; then, selection was carried out; the binding nucleotide acids were eluted from the supporter directly. Protocol 2: selection was done in solution; nucleotide acid protein complex was captured in nitrocellulose membrane; the binding nucleotide acids were obtained from membrane. Filter biding assay and gel shift assay were performed to detect the affinity of the enriched ssDNA library from different protocols. Results After 4 rounds of selection, the affinity to TGF ? RⅡ was obviously improved in the enriched library from protocol 2 compared with the initial library, while no such improvement was found in the enriched library from protocol 1. Conclusion In the SELEX experiment, the way of selection in solution, then partition of the binding nucleotide acids in filter is easier to enrich the binding fragment from initial ssDNA random library, compared with the way of fixation of target protein to solid supporter, then selection between the solid phase and liquid phase and elution of the binding nucleotide acids from supporter.

Objective To observe any therapeutic effect of transcutaneous electric nerve stimulation (TENS) on patients with shoulder-hand syndrome after stroke (SHSAS) and to examine the influence of TENS on sympathetic skin response (SSR).Methods Sixty-eight patients with SHSAS were randomly divided into a treatment group (35 cases) treated with routine rehabilitation training and TENS therapy and a control group (33 cases)treated with routine rehabilitation training only.The therapy for both groups lasted 3 weeks.The severity of pain and edema of the affected upper limb was assessed with a visual analogue scale (VAS) while sympathetic skin response was recorded from the affected upper limb before and after treatment.Results VAS scores improved significantly in the treatment group,and significantly more than in the control group.There was no significant difference in the SSR latencies,amplitudes or abnormality rates between the two groups before treatment.The latencies and abnormality rates of both groups improved significantly after treatment,but the improvement in the treatment group was more obvious.The SSR amplitudes did not change significantly after treatment in either group.There was a positive correlation between the SSR latencies and abnormality rates and the VAS scores,but no significant correlation between SSR amplitude and the VAS scores.Conclusions TENS therapy combined with routine rehabilitation training showed not only good clinical results,but also significant changes in SSR among patients with SHSAS.This indicates that SSR could be used to evaluate therapeutic effects in SHSAS patients.

Objective To investigate the correlation of HIF-1α and hypoxia in keloids fibroblasts, and to investigate the mechanism that hypoxia promotes abnormal scarring by HIF-1α pathway. Methods Keloid fibroblasts cultured in vitro were placed in an incubator with different O2 concentrations. After 24 h, the keloid fibroblasts were collected for further study. Western blotting was performed to detect the expression of HIF-1α in the keloid fibroblasts. Results Relative amounts of HIF-1α in keloid fibroblasts cultured under O2 concentrations at 20 %, 10 %, 5 % and 1 % were 0. 007 ±0. 006, 0. 133 ±0. 006, 0. 537±0. 015 and 0. 903±0. 021, respectively. It indicated that hypoxia could increase the expression of HIF-lα in keloid fibroblasts. Conclusions Hypoxia can induce the expression of HIF-1α in fibroblasts of keloids. Moreover, there still is a positive relation between hypoxia and the expression of HIF-1α. Therefore, a close relationship exists between abnormal scarring and HIF-1α pathway by hypoxia.

Objective To investigate the effect of pretreatment with parecoxib for postoperative analgesia in patients undergoing laparoscopic hernia repair. Methods Sixty patients undergoing laparoscopic hernia repair were assigned in two groups by random digits table with 30 cases each. The patients in pretreating group received parecoxib 40 mg intravenously before anesthesia, and in control group with the same capacity of normal saline. All patients were anesthetized with combined spinal epidural blockage and tranquilized with pethidine, droperidol and diazepam. Postoperative pain of the abdomen incision was assessed by visual analogue scale (VAS) and the pain of shoulder or back was judged by a 4 grade scale. Side-effects, supplement analgesic, passage of gas by anus 24 h after surgery were observed as well. Results The abdomen incision VAS at 4,8,12,24 h after surgery in pretreating group were lower than those in control group (P ＜ 0.05). And the incidence of pain of shoulder or back was lower in pretreating group (13.3% ,4/30) than that in control group (33.3% ,10/30)(P ＜0.05). While the cases needing supplement analgesic also decreased in pretreating group (13.3% ,4/30) compared with control group (40.0%, 12/30)(P ＜ 0.05). And the side effects and passage of gas by anus 24 h after surgery had no significant difference in two groups. Conclusion Pretreatment with parecoxib in patients undergoing laparoscopic hernia repair may relieve the postoperative incision pain and the pain of shoulder or back while reducing the analgesic supplement without side effects.

Objective The aim of this study was designed to investigate the changes of macrophages and activated microglias in white matter damage (WMD) in premature infants and effects of allopurinol. Methods An animal model for WMD was established by bilateral carotid artery occulation (BCAO). Forty-two newborn SD rats (1 day old) were divided randomly into 3 groups: sham surgery group (Sham), BCAO group (BCAO) and allopurinol treated group (ALLO). Pathological changes were studied 7 days and 14 days after BCAO, respectively. Macrophages and activated microglias were detected by immunohistochemistry 7 days and 14 days after BCAO, respectively. Results In BCAO group, Ten cases had mild or severe rarefaction in the corpus callosum area, especially at the cingulum. Pathological changes of white matter were found in 4 cases in internal capsule. Eight cases had subcortex white matter rarefaction. The extent of white matter rarefaction in ALLO group was reduced significantly. Enlargement of bilateral ventricles was found in 6 of 8 cases in BCAO group. Compared to BCAD group [(3.27±0.73)%] the average ventricle size was reduced significantly in ALLO group [(2.44±0.71)%] (P<0.05). ED1 positive cells were found in corpus callosum,hippocampus, and internal capsule in all groups. BCAO group had more ED1 positive cells than the other two groups, and the staining extent in BCAO group was stronger than that in the other two groups. Conclusions BCAO could be used in newborn rats (1 day old) to establish a premature WMD animal model. Macrophages and microglias may play an important role in premature WMD. ALLO may have a potential protective effect on premature SD rat with ischemic WMD.