Objective To assess the performance of onboard oxygen generating and supplying system. Methods A model of a person and 8 volunteers in hypobaric chamber and rapid decompression chamber underwent the tests of producing oxygen ability of the oxygen concentrator of board oxygen generating system normal performance tests on oxygen supply at 0～8 000m, performance tests at cruising altitude for longrange, warning performance tests, secondary oxygen switch tests, positive pressure oxygen performance tests and rapid decompression performance tests. Results All the ability of producing and supply of oxygen, and the normal and the emergency performance of onboard oxygen generating system could fulfill the system physiological requirements. Conclusion On board oxygen generating and supplying system could meet pilots normal and emergeney needs when pilots aviate for long range in high altitude.

Objective To summarize the related factors and nursing countermeasures of complications after the laparoscopy-assisted surgery for congenital hypertrophic pyloric stenosis.Methods Clinical data about the occurrence of complications and nursing points were retrospectively analyzed in 106 cases of neonates and infants.Results Surgical complications occurred in 16 cases,including mucosal perforation in 2 cases,abdominal cavity hemorrhage in 1 case,puncture hole infection in 1 case,repeated postoperative vomiting caused by incomplete pyloric separation in 1 case,postoperative hypercapnia in 2 cases,subcutaneous emphysema in 1 case,8 cases of postoperative hypothermia.No operative deaths.No poking holes hernia and abdominal organ injury.By careful observation and nursing,all cases got rid of postoperative complucations.Within postoperative 3～7 days,they were recovered and discharged,no nursing complications occurred.Conclusions Early discovery of complications and timely nursing intervention are important guarantee for patients to pass through laparoscopic surgery smoothly and obtain swift recovery.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Carbon Monoxide Poisoning ; epidemiology ; therapy ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Inpatients ; statistics & numerical data ; Male ; Middle Aged ; Young Adult

Objective To investigate the effect of electroacupuncture at point Fenglong(ST40) on the expressions of macrophage surface antigen CD11b and intercellular adhesion molecule-1 (ICAM-1) in hyperlipidemia rats. Method Forty healthy SD rats were randomly allocated to normal control, high fat diet, high fat+common diet, high fat diet and treatment, and high fat+common diet and treatment groups. After 28 days of treatment with electroacupuncture at point Fenglong, blood lipid levels, namely, total cholesterol (TC), triglyceride (TG), low density lipoprotein cholesterol (LDL-C) and high density lipoprotein cholesterol (HDL-C) contents were measured in every group of rats. The expressions of peritoneal macrophage surface antigen CD11b and ICAM-1 were examined using flow cytometry (FCM) in every group of rats. Result Plasma TC and LDL-C increased significantly in the high fat diet group of rats compared with the normal control group (P<0.01). In the high fat+common diet group of rats, serum TC and LDL-C decreased significantly in comparison with the high fat diet group (P<0.01) but increased significantly in comparison with the normal control group (P<0.01). After treatment with electroacupuncture at point Fenglong, rat plasma TC and LDL-C decreased significantly (P<0.01) and TG and HDL-C did not change significantly (P>0.05). The expression rates of macrophage CD11b and ICAM-1 increased significantly in the high fat diet group of rats compared with the normal group (P<0.01). In the high fat+common diet group of rats, the expression rates of macrophage CD11b and ICAM-1 decreased significantly in comparison with the high fat diet group (P<0.05) but increased significantly in comparison with the normal group (P<0.01). The expression rates of CD11b and ICAM-1 decreased significantly in the high fat diet and treatment group compared with the high fat diet group (P<0.01) and decreased significantly in the high fat+common diet and treatment group compared with the high fat+common diet group (P<0.01) and the high fat diet and treatment group (P<0.01). Correlation analysis showed that CD11b and ICAM-1 levels had a significantly positive correlation (r=0.947, P<0.01). Conclusion Electroacupuncture at point Fenglong can significantly down-regulate blood fat TC and LDL-C levels and the expressions of macrophage CD11b and ICAM-1 in hyperlipidemia rats. It has a certain therapeutic effect on hyperlipidemia.

Objective To study the characteristics of mesenchymal stem cells(MSCs)derived from chronic myelogenous leukemia(CML)patients' bone marrow and examine their hematopoiesis support in vitro.Methods MSCs from CML were obtained and cultured.Immunophenotype and in vitro differentiation capacities were investigated.Moreover,the Ph chromosome and bcr/abl gene of CML derived MSCs were detected.The expression of cytokines was detected by RT-PCR,and hema- topoiesis support of MSCs in vitro was detected by long-term bone marrow culture and the methylcel- lulose progenitor assay.Results CML derived MSCs showed a typical fibroblast like morphology. They were positive for CD29,CD44 and CD105,while negative for CD14,CD31,CD45,CD34 and HLA-DR.Under suitable conditions,CML derived MSCs could differentiate into osteoblasts and adi- pocytes.Further,CML derived MSCs showed a normal choromosome,and did not express bcr/abl gene.At last,they expressed hematopoiesis cytokines and possessed ability of hematopoiesis support in vitro.Conclusion There are MSCs with multidirectional differentiation potential in CML bone mar- row and they possess the ability of hematopoiesis support.

Objective:To study the effects of the fastigial nucleus electrostimulation on the ability of learning and memory and the Apoptosis of the neurons in the hippocampal district in ratymodel of Alzheimer's D isease induced by?-amyloid(A?).Methods:Forty rats were randomly divided into:A?1-40 micro-injection groups(AD),sham-operation roup(SC),A?1-40 micro-injection and fastigial nucleus stimulation group(FNS),a A?1-40 micro-injection and corpus dentatum stimulation group(DNS).The effect of fastigial nucleus electrostimulation on learning and memory retention disorder in the model rats was studied by the test of Morris water maze;the brain protection of fastigial nucleus electrostimulation in model rats was observed through pathomorphology changes;the Apoptosis of the neurons in the hippocampal CA1 district was detected by Terminal deoxynucleotidyl transferase-mediated dUTP nick-end-labeling method.Results:The escape latency of the place navigation in the AD grou,FNS group and DNS group were singnificiantly longer than that in the SC group(P

Objective: To study the influence of inflammatory cytokine TNF-? on the expression of adhesion molecules and specific markers of rat MSCs, and to study the optimal stimulation of MSCs with inflammatory factors in inducing adhesion molecule expression which promotes migration of MSCs to the ischemic area in liver. Methods: The MSCs stimulated with different concentration of TNF-? were detected for adhesion molecules and stem cells markers on cell surface with the method of flow-cytometry, MSCs which were stimulated with the optimal concentration of TNF-? and labeled with 1, 1-Dioctadecyl-3, 3, 3, 3-tetramethylindocarbocyanine Iodade(DiI)were delivered intravenously to the rats whose liver was injured by ischemia, the liver function of the experimented animals were tested, and liver samples in the ischemic area were obtained, the number of MSCs was counted under a fluorescent microscope. Results: Stimulated with TNF-?, MSC ex-pression of VCAM-1 increased, while that of stem cell markers did not change markedly. Exposed to lower concentration of TNF-?, the adhesion ability of MSCs obviously increased and more MSCs rested in the ischemic areas in the rat liver, compared to the control groups. Conclusions: TNF-? can increase the expression of VCAM-1 on rat MSCs while exert little effect on the stem cell character of MSCs. Suitable concentration of TNF-? can promote MSCs migration to the damaged tissue, which provides rationale for the treatment of liver disease.

Objective To evaluate the effect of CT temporal subtraction(TS) for detection of lung nodules.Methods 80 cases of CT images (current and previous CT images) and corresponding CT TS images were presented, which included 30 cases with nodules(75 nodules) and 50 controls.4 observers, including 2 radiologists and 2 residents, indicated their confidence level regarding the presence of a new emerging or larger or solid component than before,which first used standard CT images, then with the addition of CT TS images.Receiver operating characteristic(ROC) curve analysis was used to evaluate the observers'' performance.Results The mean value of the area under the ROC curve (AUC) were 0.860 and 0.925 for four observers without and with TS images,respectively(P<0.01).Average sensitivity for detection of lung nodules was improved from 77.3%(58/75) to 89.3%(67/75) by using CT TS images.Conclusion The use of CT TS images can significantly improve radiologists'' performance for detection of lung nodules,especially when a small size solid or subsolid nodule presents near the pulmonary hilum.CT TS is more helpful for residents.

Objective To study the feasibility of TNF-α promoting migration of rat mesenchymal stem cells (MSCs) to local damaged tissues. Methods The MSCs was exposed to TNF-α at different concentrations and the expression rate of surface adheslon molecules and specific markers as well as their adhesion to endothelial cells were detected.Based on the above steps,the MSCs stimulated with the optimal concentration of TNF-α were obtained and were injected intravenously to the rats whose hindlimbs experienced ischemia damage.The rats were executed for achieving the muscle samples in the ischemic area,which were made into frozen section to count the number of MSCs. Results ( 1 ) Twenty-four hours after the TNF-o stimulation,the expression of adhesion molecule (VCAM-1) of MSCs increased in a concentration-dependent manner,while the expression of adhesion molecules (ICAM-1,L-Selectin and VLA4) of MSCs showed no significant changes.Besides,the expression rate of specific markers of MSCs was also obscure.(2) Exposed to 10 ng/ml TNF-o,MSCs presented an obviously increased ability in adhesion to the endothelial cells.(3) MSCs stimulated with 10 ng/ml TNF-α showed a larger number in the ischemia-damaged tissue of rat hindlimbs than that in the control group. Conclusion TNF-α at concentration of 10 ng/ml is effective within a short term in increasing VCAM-1 expression in rat MSCs and promoting the adhesion of MSCs to endothelial cells without affecting their character.

Objective To provide the oxygen supply apparatus when the civil aviator and airforce pilot are inspected the hypoxia tolerance and altitude tolerance in the hypobaric environment.Methods Demand oxygen and contstant flow oxygen were supplied.Results The portable hypobaric oxygen supply apparatus can supply mixed oxygen below the altitude 8 000 m,and the oxygenous concentration of mixed oxygen was adjusted according to the altitude.The pure oxygen was supplied when the altitude was at 8 000～12 000 m.Conclusion The normal and emergency oxygen supply performance can fulfill the system physiological requirements.The portable hypobaric oxygen supply apparatus may be used by the persons engaging in special task on plateau also.