Objective To investigate the indications and efficacy of endovascular stenting for the treatment of thoracic aortic aneurysm.Methods From March 2005 to October 2008,21 patients with Stanford type B aortic dissection,5 cases of pseudoaneurysm,and 2 patient with intramural hematoma complicated with ulcer of the aortic wall were treated by endovascular stenting under general(2 cases) or local(26 cases) anesthesia in our hospital.Medtronic Talent stent was employed in 10 cases,Medtronic Valiant stent was used in 12,and microinvasive straight-type stent was used in 6 patients.Results The operation was completed successfully in all of the 28 cases.Angiography showed that the gaps in the aorta were closed without endoleak.No patient had chest pain or neurological complications.The patients were discharged in(4.5?1.1) days(range 3-7 days).Five patients developed fever after the operation and were cured by indomethacin in one month.One week after the surgery,in 21 cases,CT scan showed enlarged aortic dissection,improved blood supply,thrombus in the false lumen of the thoracic aorta,and a false lumen in the abdominal aorta.In the 5 cases with pseudoaneurysm,CT scan confirmed that the rupture was closed with thrombus being detected in the lumen.The aortic ulcers that were detected in the 2 cases,who had intramural hematoma,were covered by the stents.Of the patients,a follow-up of(21.3?10.2) months(range 1-40 months) was available in 23 patients,who had no complications during the period.Conclusions Endovascular stenting is a simple,safe and effective method for Stanford type B aortic dissection,pseudoaneurysm,and intramural hematoma,resulting in quick recovery,less complications,and short hospital stay.

Objective To explore the correlation analysis of plasma TNF-?,D-lactate levels and serious case score and clinical significance.Methods Plasma TNF-?,D-lactate levels and results from serious case'score was contrastingly studied in 120 cases of serious sick children during hospitalization in our PICU.Results The study findings showed that the plasma TNF-? and D-lactate levels had produced an obviously influence on score.Conclusions The more high plasma TNF-? and D-lactate levels,the lower score and the more dangerous condition in children with serious disease.

Objectives:To investigate the effect of TP 5 on the immune function and infection rate in patients undergoing cardiopulmonary bypass(CPB) operation. Methods:Ninety four patients were divided into two groups to observe the effect of TP 5 on the immune function and infection rate. Results:The immunological parameters in the TP 5 group was better than the control group, and postoperative infection was prevented. Conclusions:TP 5 can improve patients' cell mediated immunity and reduce infection rate.

Applying combined PBL and traditional teaching method to medical chemistry experimental teaching.Questionnaire and course examination were used to evaluate teaching ef-fect.The conclusion was that PBL teaching method was more helpful and effective than that of single traditional teaching method.

ObjectiveTo determine optimal positive end expiratory pressure (PEEP) in mechanical ventilation in children with severe asthmatoid disease based on the quasistatic pressure-volume (P-V) curve.MethodsA serf-control study was done on 23 children with severe asthmatoid disease in the pediatric intensive care unit( PICU ).Quasistatic lung P-V curve of these patients was analyzed and the lower inflection point (LIP) from P-V curve was determined.Three different PEEP (0 cm H2O,LIP,LIP+2 cm H2O,1 mm H2O =0.098 kPa) were given to the patients.The effects of PEEP at different levels on gas exchange,hemodynamic and airway pressure were observed.ResultsThe quasistatic LIP were (2.70 ±2.00)cm H2O.When PEEP was increased to the level of LIP + 2 cm H2O,PaO2 / FiO2 and lung compliance improved significantly (P ＜ 0.01 ) and dynamic lung compliance was the highest,peak inspiratory pressure was (22.30 ± 3.00) cm H2O and mean airway pressure was( 14.11 ± 1.01 ) cm H2O,without obvious adverse effects on mean arterial blood pressure and heart rate.There was no difference in PaCO2,when compared PEEP =0 cmH2O to PEEP =LIP + 2 cmH2O.ConclusionThe application of PEEP is safe.LIP + 2 cm H2O from quasistatic P-V curve could be set as the optimal PEEP under which mechanical ventilation has the best efficacy and do not aggravate CO2 retention and abnormality of hemodynamics in children with severe asthmatoid disease.

Objective To investigate the mechanism of P/Q-type calcium channel in nitroglycerin induced migraine experimental model Methods Twenty Sprague-Dawley rats ( half female and half male) were randomly divided into control group and model group. The model of migraine rats was reproduced using Tasserelli Cristina method that wassubcutaneou injection of GTN of 10 mg/kg, once a week for four weeks. After the model of migraine had been established, trigeminal ganglion and trigeminocervical complex and cortex of frontal lobe were removed and the expressions of P/Q-type calcium channel were detected by RT- PCR and Western-blot, and at the same time the concentration of intracellular Ca2+ was investigated by Fluo- 3/AM fluorometric method. Results Compared with the control group, the expression of mRNA and protein of P/Q-type calcium channel of trigeminal ganglion and trigeminocervical complex (mRNA: 0. 472 36± 0. 049 54; protein: 0. 337 25 ± 0. 035 93 ) and cortex of frontal lobe ( mRNA: 0. 547 45 ± 0. 044 39 ; protein : 0. 402 13 ± 0. 029 83) in model group all upregulated (t = 2. 6697, 3. 1993, 3. 4398 and 3. 7661, all P <0. 05), at the same time the concentration of intracellular Ca2+ in model group increased (211 182 ± 12 973 vs 135 243 ± 18 105 in trigeminal ganglion and trigeminocervical complex; 186 511 ± 18 297 vs 143 289±25 175 in cortex of frontal lobe. t =10.7819 and 4. 3917, beth P<0.05). Conclusions P/Q- type calcium channel may play a role in the pathogenesis of migraine via its upregulated expression.

Objective To analyze the clinical features of the hyperamylasemia in critically ill children and investigate the related risk factors in order to provide the basis for prevention and treatment. Methods A total of 1036 critically ill children admitted in pediatric intensive care unit (PICU)from April,2011 to Oct,2012 were studied.They were divided into the high amylase group (n=82)and the normal group (n=954).According to the outcomes,the high amylase group was divided into survival group (n=61 ) and death group (n =21 ).The related risk factors of the occurrence and outcome of hyperamylasemia were analyzed by univariate and multivariate Logistic regression.Results There were statistically significant differences in rates of coagulation disorders, convulsions, disturbance of consciousness,pediatric critical illness score (PCIS)≤80,multiple organ dysfunction (MODS)≥3, sepsis,shock,and lactic acid (LA),procalcitonin (PCT),blood glucose (BG)between the high amylase group and the normal group (P<0.05 ).The differences in the rates of coagulation disorders,convulsions, mechanical ventilation,PCIS≤80,MODS≥3,and LA,PCT,oxygenation index,albumin,C-peptide,BG were statistically significant between the survival group and the death group (P <0.05 ).Multivariate Logistic regression analysis showed that the risk factors of the hyperamylasemia's occurrence were LA,PCT, BG,PCIS<80,MODS>3.Adjusted ORs confidence intervals of them were 1.662 (1.236-2.234),1.042 (1.025-1.060),1.612 (1.411-1.843),3.219 (1.311-7.905),3.411 (1.370-8.494),respectively. The hyperamylasemia's prognostic risk factors were PCT,C-peptide,PCIS ≤80,MODS >3,shock. Adjusted ORs confidence intervals of them were 1.066(1.021-1.113),1.437(1.017 ~2.030),16.137 (1.876-138.836),10.437(1.528-71.925),20.928(1.938-226.009),respectively.Conclusions The severity of the disease,the levels of LA,PCT,BG in critically ill children were positively correlated to the occurrence of hyperamylasemia.The severity of the disease,the incidence of organ failures,the levels of PCT,C-peptide combined shock in children with hyperamylasemia were positively correlated to the prognosis of hyperamylasemia.

Objective To analyze the clinical features of critically ill children with abnormal pancreatic ultrasound findings in order to explore the related risk factors for offering evidence-based diagnosis of pancreatic damage secondary to critical illness.Methods A prospective study was performed in 531 critically ill children admitted to pediatric intensive care unit(PICU) of 17 children' hospitals from January 2012 to March 2014.All patients were divided into control group(513 cases) and abnormal group(18 cases) according to the pancreatic ultrasound findings.Comparison of clinical features and biochemical indicators were made between two groups.The related risk factors associated with abnormal pancreatic ultrasound findings were analyzed by using Logistic regression analysis.ROC curves were used to evaluate the role of amylase and lipase in the diagnose of abnormal pancreatic ultrasound findings.Results The incidence of abnormal pancreatic ultrasound findings in critically ill children was 3.39%, the average age of abnormal group was significantly older than that in control group (P<0.01).There were not statistically significant differences in gender and primary disease between two groups.The incidence of hypotension was 22.2% and the incidence of abdominal muscle tension was 16.7% in abnormal group,which were statistically higher than those in control group (P<0.05).The levels of calcium, albumin of abnormal group were significantly lower than those in control group (P<0.01), and levels of serum amylase, lipase, lactate dehydrogenase in abnormal group were significantly higher than those in control group (P<0.01).The risk factors associated with abnormal pancreatic ultrasound findings were age, blood pressure, calcium,amylase.Area under the ROC curve of abnormal pancreatic ultrasound findings determined by amylase and lipase were 0.803 and 0.745,respectively (P<0.05).The sensitivity was 0.667, specificity was 0.881 when the serum amylase was 101.5 U/L, the sensitivity was 0.722, specificity was 0.928 when the serum lipase was 96.9 U/L.Conclusions The incidence of abnormal pancreatic ultrasound findings was rather low in critically ill children.The risk factors associated with abnormal pancreatic ultrasound findings were hypotension, hypocalcemia, and hyperamylasemia.The elevated serum amylase and lipase might be the most likely factors associtaed with abnormal pancreatic ultrasound findings.

Objective To id scuss the role and safety of fiberoptic bronchoscopy for diagnosing and treating respiratory dsi ease in PICU.Methods A total of 95 eil gible children with respri atory diseases admi-tted ni PICU of Hu′nan Prvo inec Children′s Hospital were enroll ed in this retrospectvi e study from January 2013t o December 2013, and the efficacy and complications of fiberoptic bronchoscopy were assessed.Results A total of 95 children underwented bronchoscopy 112 timest, he most common of microscopic examination resutl s was tracheal bronchitis ( 62.1%) , followed by congenital airway abnormality ( 21.1%); 58 times (56.9%) showed becteria positive in 102 times lavage and sputum culture results, including 16 times (27.6%) of Klebsiella pneumoniae bacteria,12 times(20.7%) of Acinetobacter baumannii.After under-wenting bronchoscopy and lavage wash,blood gas analysis of pH value,PaO2 ,PaCO2 ,SaO2 had significant improvement than before( P<0.05 ) , respiratory rate had improved than before ( P<0.05 ) , little effect in heart rate(P>0.05).The inrt aopear tive and postoperative transient comlp ications were obserev d in 38 times (33.9%).Conclusion The appil cation of fiberoptic bronchoscopy for diagnosing and ter ating disease in PICU has a cetr ia n value, its vo erall safety is reliable.