The postoperative neurological complications is associated with intraoperative cerebral emboli, which results from extracorporeal circulation and operation. It can effectively reduce the incidence of neurological complications with ultrasonic radiation. In fluids, a particle will change it's motion trail when it is acted by the radiation force generated by the ultrasound. This article mainly discuss how to shielding emboli with ultrasound. The equipment can transmit phased ultrasonic signals, which is designed on a FPGA development board. The board can generate a square wave, which is converted into a sine wave through a power amplifier. In addition, the control software has been developed on Qt development environment. The result indicates it's feasible to shielding emboli with ultrasonic radiation force. This article builds a strong foundation for the future research.
Humans ; Intracranial Embolism ; diagnostic imaging ; prevention & control ; Intraoperative Complications ; prevention & control ; Postoperative Complications ; prevention & control ; Ultrasonics ; instrumentation ; Ultrasonography

Objecttive: The article analyzed how neurophysiological signals of adolescent's working memory(WM) change with increasing age.Methods: We recorded ERP from 52 healthy subjects aged from 14 to 22 years old in three groups.Our experiment consisted of 4 subexperiments and had two types of working memory tasks: spatial working memory and verbal working memory tasks,furthermore,every task included two levels of difficulty.Results: ①Reaction time was faster with increasing age,there was significant difference in accuracy of complicated tasks in different age groups with junior high school group significantly lower than others;②There was significant difference between junior high school group and college group in frontal P200 amplitude and its latency had no significant difference in the three groups;③Occipital P100 amplitude was descending when age was increasing and there had significant difference in latency between junior high school group and college group;④Occipital N160 amplitude was increasing with age and the latency was descending with age and there was significant difference between junior high school group and college group;⑤Average amplitude of parietal P300 was increasing with age and junior high school group's was significantly lower than the other two groups'.Conclusion: Teenager's working memory changes unevenly with age.

Objective To establish a method to determine dicofol and eight pyrethroid pesticides residues in vegetables and fruits by gas chromatography.Methods The crushed samples were extracted with organic solvent,then the extract was analyzed by DM-17 capillary column gas chromatography after being purified by PestiCarb-NH2 cartridge and silica cartridge solid phase extraction.Results The detection curve covered the linear range of 0.10-2.0 ?g/ml .The minimum detection limit was 0.011-0.090 ?g/kg.The rates of recovery were 85.4%-105%.The variable coefficient(RSD) was under 7.0%.Conclusion This method has the advantages of less disturb, simple and high accuracy, and it can be applicable to the routine analysis of dicofol and pyrethroid pesticides residues.

Idiopathic pulmonary fibrosis(IPF), as one of the chronic and complex diseases, is with high incidence and mortality rate. It is also a difficult to treat disease in modern medicine. Traditional Chinese medicine (TCM) syndrome differentiation and treatment embodies characteristics and advantages. In recent years, the collateral disease theory guiding the prevention and treatment of the chronic and complex diseases has become a hot point and frontier in medical research, and achieved certain effects. This article is to summary the structures and functions of pulmonary collaterals based on the collateral disease theory. Combined with clinical manifestations of IPF, we put forward Fei-Re Luo-Y u as the fundamental role in the pathogenesis of IPF in its acute phase to lay the theoretical foundation to the further exploration of syndrome prevention and differentiation on IPF in its acute exacerbation.

Objective To investigate the effect of carbon dioxid insufflation on cerebral blood flow (CBF) during laparoscopic cholecystectomy. Methods Thirty patients ASA grade Ⅰ- Ⅱ undergoing laparoscopic cholecystectomy were selected. The values of jugular venous oxygen partial pressure(PjvO2 ) jugular venous oxygen saturation (SjvO2 ), arterial partial pressure of carbon dioxide (PaCO2), oxygen (PaO2) and saturation (SaO2 ) were measured before the insufflation, 10 min and 30 min after the insufnation, respectively. Results Compared with those before the insufflation, SjvO2 and PacO2 were increased significantly, and arterial--jugular venous oxygen content difference (Ca-jvDO2 ) decreased markedly 10 min and 30 min after insufflation (P

ObjectiveTo explore the physical growth and development conditions of the disabled children (except physical disability) aged 7～18 in Guangzhou and Dongying.MethodsA census was carried out among disabled children aged 7～18 in Guangzhou and Dongying. The physical growth and development condition was analyzed through height and weight of the disabled children.ResultsHeight and weight of the disabled children were both lower, compared with physically healthy children. The rate of thinness was 12.61% among the boys and 12.54% among the girls of the disabled children, the rate of growth retardation was 31.41% among the boys and 34.94% among the girls of the disabled children.ConclusionDisabled children aged 7～18 are in bad condition of physical growth and development. The rates of thinness and growth retardation are high among boys and girls with disability.

This article elaborated the theory of chronic and complex disease treatment based on collaterals. It put forward that complex virtual evil stasis was the common pathogenesis of chronic and complex disease treatment. Combined with articles published in recent 5 years, from the perspective of cytokines and genes, it summarized traditional Chinese medicine (TCM) compound targets in chronic and complex disease treatment. It put forward the transforming growth factor-β1 (TGF-β1), tumor necrosis factor-α(TNF-α), interleukin-6 (IL-6), vascular endothelial growth factors (VEGFs), matrix metalloproteinases/tissue inhibitor of metalloproteinase (MMPs/TIMPs) were its high-frequency targets. It provided a basis for future experiment design on chronic and complex disease treatment based on collaterals as well as new drug development.

Objective To investigate the application data of 6-minute walk test to evaluate the surgical effect of congenital heart disease with pulmonary hypertension.Methods 83 cases of congenital heart disease with pulmonary hypertension were selected and divided into mild(28 patients) ,moderate(30 patients) and severe(25 patients)three groups according to the ultrasound preoperative pulmonary artery systolic pressure estimation (SPAP), all patients underwent surgery correction of heart defects, and before and after surgery the patients were detected SPAP and 6MWT,6MWT observed for evaluating the effect of surgery. Results After surgery,the SPAP of, mild, moderate and severe group were ( 28.7 ± 5. 6) mm Hg, ( 28.7 ± 5.6 ) mm Hg, ( 28.7 ± 5.6 )mm Hg, significantly decreased, 6 MWT were (436. 5 ± 37. 0) m, ( 411.0 ± 39. 8 ) m, ( 338.7 ± 32. 4 ) m, significantly increased, more significant changes in moderate group; The mechanical ventilation and ICU stay of severe group were ( 12. 6 ± 3.2) h, ( 5.5 ± 1.0) d, significandy longer than the mild and moderate groups ( t = 11. 770,6. 118,18. 721,9. 970, all P ＜ 0. 05 ). Conclusion 6-minute walk test to evaluate the surgical effect of congenital heart disease with pulmonary hypertension had clinical significance,and in moderate to severe pulmonary hypertension in patients with clinical assessment more meaningful,and it was worthy of attention.

Objective To introduce several commonly used puncture techniques for retroperitoneal lymph node metastases in order to provide technical guidance in performing 125I seed implantation therapy. Methods The puncture methods used at authors’ interventional department in performing 125I seed implantation therapy for retroperitoneal lymph node metastases were summarized. Results The commonly used puncture methods included parallel needle puncturing technique , trans-viscera puncturing technique , broadening path puncturing technique and coaxial needle puncturing technique. Conclusion An effective combination use of various puncturing techniques to uniformly implant the radioactive 125I seeds into the lesion can improve the therapeutic result and reduce the occurrence of complications.

Objective To discuss the blood perfusion characteristic of benign and malignant gallbladder disease by contrast-enhanced ultrasound(CEUS).Methods The enhancement characteristic of 62 patients with occupying lesions in gallbladder were observed.Four case of cholecystolithiasis accompany biliary sludge were proven by surgery and remaining 58 case were confirmed by histopathological examination.Their enhancement time and enhancement pattern were analyzed.Results The Time-to peak of benign and malignant disease were (22.4± 4.0)s and (27.7± 2.6)s (t =5.756,P ＜0.01),the Time-to-hypoenhancement of benign and malignant disease were (58.0 ± 7.3)s and (41.5 ± 4.0)s (t =10.33,P ＜0.01),respectively.The peak intensity of benign and malignant disease were (19.2 ± 3.6)dB and (25.1 ± 2.9) dB (t =6.85,P ＜0.01),the mean transit time of benign and malignant disease were (22.72 ± 4.7)s and (6.3± 6.4)s (t =15.001,P ＜0.01),respectively.The destruction of the gallbladder wall of benign and malignant disease were 0％ (0/36) and 57.7％ (15/26) (x2 =25.05,P ＜ 0.01),the inhomogeneous enhancement of benign except biliary sludge and malignant disease were 43.8％ (14/32) and 57.7％ (15/26) (x2 =1.115,P =0.291,respectively).In early phase,78.1％ (25/32) and 80.8 ％ (21/26) of benign disease except biliary sludge and malignant showed hyperenhancement respectively(x2 =3.15,P =0.207).In later phase,84.4％ (27/32) and 76.9％ (20/26) of benign disease except biliary sludge and malignant showed hypoenhancement respectively(x2 =3.615,P =0.164).Conclusions CEUS can obtain the information of blood perfusion and make quantitatively analysis about the enhancement time.It also facilitate the diagnosis of solid occupying lesion in gallbladder.