Objective To determine whether attention allocation deficits contribute to nonfluent aphasia during orthography, phonology, and semantic processing with Chinese characters. Methods Sixteen patients and sixteen controls participated in single and dual tasks. In the single task participants were required to read Chinese characters silently and to make radical, semantic, and final sound judgments (for example, whether the charactersincluded the sound 'ang' ) simultaneously. During the dual task the only difference was that the participants wereasked to read the presented characters aloud and make the same three judgments. Reaction time and error rate were recorded and analysed. Results Reaction times in orthographic judgment were significantly longer for patients than for controls in both task setups. The error rate was also significantly higher. The patients' reaction times in makingphonological judgments in the dual task were significantly longer than in the single task, but there was no significantdifference in error rates between the patients and the controls. In making semantic judgments, neither reaction times nor error rates differed significantly with either the single or dual task protocol. Conclusion Attention allocation deficits play a key role in Chinese character orthographic and phonological processing for nonfluent aphasia sufferers.

:Mitochondrial respiratory rate,respiratory control rate(RCR),oxidative phospho-rylation efficiency(ADP/O),and hepatic ATP content were determined in rats under 5 conditions including acute obstructive cholangitis(AOC),bile duct ligation(BDL),verapamil pretreatment in AOC(VET),dexamethasone pretreatment in AOC(DET).and sham operation(SO).It was found that rnitochondrial respiratory rate especially its state 4 phase was significantly increased and RCR,ADP/O,and ATP were significantly decreased at 6th hour after AOC and at 24th after BDL.These changes occurred earlier and more dramatically in AOC than in BDL.Pretreatment with verapamil or dexamethasone in AOC could minimize the changes of RCR,ADP/O and ATP in varying intervals.The findings indicate that AOC and BDL can both result in severe functional impairment of the mitochondria of hepatocytes and verapamil and dexamethasone exert effective protection on the rnitochondrial functions of respiration and energy metablism.

Objective In the present study we examined the roles of three proinflammatory cytokines, i.e. tumor necrosis factor-?(TNF-?), interleukin 1?(IL-1?), and IL-8 in the early phase of APTE, and analyze the impact of these cytokines on the systemic circulation. Methods APTE was induced in 7 anesthetized dogs by injecting the thrombus of own blood into the right jugular vein. Seven animals receiving only warm sterile saline served as controls. Arterial serum samples were collected regularly (0h, 0.5h, 1h, 2h, 4h, 6h) and cytokine levels could be measured by radio-immunity assay. Results Introduction of clots into the pulmonary circulation caused significant increase in the mean pulmonary arterial pressure(from 99.1?5.7 to 66.8?15.3mmHg, P

10% was found in 5 patients (16%). Mesothelial hyperplasia was found to be significantly higher in patients with PTE than that in the control group (P

Objective To evaluate the characteristics of leptomeningeal metastasis of gliomas on magnetic resonance(MR) imaging and to provide evidence for clinical early diagnosis and treatment.Methods Twenty-one cases of intracranial gliomas with leptomeningeal metastases were scanned with conventional spin echo(SE) and fast spin echo(TSE),8 cases with fluid attenuated inversion recovery(FLAIR),and all of cases were operated with enhancement.Results ⑴ With MR plain scan,18 cases revealed vary range of distortion and illegibility structure of cerebral cistern and sulcus,and 6 cases revealed the asymmetrical enhancement of the wall of ventricle.Eleven meningeal neoplasms nodes were found in subarachnoid space in 7 cases,and some of the appearances could be seen in several cases.Eight cases of them were added with FLAIR,and the neoplasms nodes were showed more clearly and higher signal than TSE-T2W imaging.⑵ With MR enhancement,all cases with encephalic gliomas showed obvious enhancement with vary features of the enhancement of leptomeningeal metastasis,including tail sign(5/21),line sign(10/21),strip sign(3/21),node sign(7/21) and a few of cases included two signs.Conclusion It was very important for clinician to improve the cognition of MR imaging characteristics of leptomeningeal metastases of glioma,and to choose the proper MR imaging scan technique to increase the detection rate of early meningeal diseases.

This article explains the purpose of setting up the sperm bank, the role of the sperm bank in auxiliary reproduction technology, and exhaustively clarifies the ethical problems in the various aspects of the social life that are caused by the sperm bank, and finally it also proposes some relevant suggestions to these problems.

Objective To evaluate the effects of different doses of dexmedetomidine administered intranasally on the median effective concentration (EC50) of sevoflurane inhibiting responses to laryngeal mask airway (LMA) insertion in the pediatric patients.Methods American Society of Anesthesiologists physical status Ⅰ or Ⅱ pediatric patients of both sexes, aged 1-3 yr, with body mass index of 20-25 kg/m2, scheduled for elective surgery under general anesthesia, were randomly divided into 3 groups: control group (group C) , dexmedetomidine 1 μg/kg group (group D1) , and dexmedetomidine 2 μg/kg group (group D2).In D1 and D2 groups, dexmedetomidine 1 and 2 μg/kg (in 1 ml of normal saline) were administered intranasally at 1 h before induction of anesthesia, respectively.Group C received the equal volume of normal saline administered intranasally.The children were separated from their parents at 45-60 min after intranasal administration and admitted to the operating room.The children inhaled 8％ sevoflurane until they lost consciousness.After loss of consciousness, the end-tidal concentration of sevoflurane was determined using the modified Dixon's up-and-down method.The initial end-tidal concentration of sevoflurane was set at 2％.The concentration was increased/decreased by 0.2％ in the next patient according to the response to LMA insertion.The patient's sedation status and with LMA acceptance were evaluated, and the patient's satisfaction with sedation and with LMA acceptance was recorded.Probit analysis was used to calculate the EC50 and 95％ confidence interval of sevoflurane inhibiting responses to LMA insertion.Results The patient's satisfaction with sedation and with LMA acceptance was significantly higher in D1 and D2 groups than in group C, and in group D2 than in group D1 (P＜0.05).The EC50 (95％ confidence interval) of sevoflurane inhibiting responses to LMA insertion was 2.03％ (1.91％-2.15％), 1.76％ (1.65％-1.87％) and 1.63％ (1.53％-1.73％) in C, D1 and D2 groups, respectively.The EC50 was significantly lower in D1 and D2 groups than in group C, and in group D2 than in group D1 (P＜0.05).Conclusion Dexmedetomidine 1 and 2 μg/kg administered intranasally can decrease the EC50 of sevoflurane inhibiting responses to LMA insertion in the pediatric patients, and 2 μg/kg produces better efficacy.

Objective To investigate the tracing value of drug-loaded nano-active carbon for lymphatic visualization and its potential application in the lymphadenectomy of gastric cancer. Methods Sixty-three patients with advanced gastric carcinoma were randomized into 2 groups:control group and tracing group. For the tracing group, 5-Fu-loaded nano-active carbon (NP-5-FU) suspension was intratumorally administered by preoperative gastroscope-guided or intra-operative injection. No tracing reagents was given in the control group. The numbers of removed lymph nodes and metastasis-involved lymph nodes as well as the lymph node staining were recorded and compared between the two groups. The adverse effects was monitored. Results The resected lymph nodes in the tracing group were much more than that of control group (43.73 ± 9. 25 vs. 25. 36 ± 4. 73, t = 3.82,P ＜ 0. 05). For the N1, N2 and N3 lymph nodes, 27. 17 ± 5. 82,13.73 ± 4. 61 and 2. 83 ± 0. 15 per case of the tracing group were desected, while they were 14. 45 ± 2. 75,8. 27 ± 1.89, and 2. 64 ± 0. 11 per case in the control group,respectively (P ＜ 0. 05 ). 26. 2% (211/842) of the lymph nodes in the tracing group showed black intensity,higher than that of unstain lymph nodes (4. 5% ,21/470,χ2 =95. 108,P ＜0. 05) and that in control group (16.9%, 142/837)( χ2 =7.485 ,P ＜ 0.05, ). No local and systemic adverse reactions were observed for the local injection of nano-active carbon. No extension of operating time and increased complications occurred. Conclusion Local injection of nano-active carbon which was loaded with 5-FU around the tumor is a very useful measure to trace the lymph nodes and facilitate the lymphedetectomy and chemotherapy.

Objective To determine the clinical characteristics of hospitalized patients who died of pulmonary thromboembolism (PTE) confirmed by autopsy. Methods The medical and autopsy records of 36 cases of autopsy proven fatal PTE in General Hospital of PLA from 1982 to 2001were reviewed. Cases of tumor embolism, fat embolism, and amniotic fluid embolism were excluded from the study. Results Six patients [16 7% (95% confidence interval, 6 4% to 32 8%)] were diagnosed as PTE prior to death. The diagnosis of PTE was significantly lower in patients with COPD or coronary artery disease. No risk factors were noted in only 4 patients (13 9%). Only a minority of patients had pleuritic pain or hemoptysis(8 3% and 11 1% respectively), while a significantly larger proportion of patients (25%, P

Objective To detect the expression of p16 and discuss the significance in genesis and development of cervical cancer. Methods FQ-PCR method was used to detect the expression levels of p16 mRNA in cervical cancer(CC),cervical intraepithelial neoplasia(CIN),and normal tissues.And in situ hybridization was used to detect HR-HPV in these tissues.Results The expres-sion levels of p16 were 0.79±0.34,0.70±0.36,0.26±0.21 in CC,CIN and normal cervical tissues,respectively.The difference was significant (P <0.05).The expression level of p16 was significantly associated with FIGO stage (P <0.05),but it showed no significant relationship with age,tumor size,cell differential degree and lymphoid node metastasis (P >0.05).The expression level of p16 in HR-HPV positive cases was significantly higher than that in HR-HPV negative cases (P <0.05).Conclusion p16 shows high expression level in cervical cancer,which is closely related to the infection of HR-HPV infection.It suggests that the high ex-pression of p16 play an important role in genesis and development of cervical cancer.