Objective To investigate the effects of early nasal intermittent positive pressure ventilation (NIPPV) compared with early continuous positive airway pressure (NCPAP) in low birth weight preterm infants with respiratory distress syndrome (RDS).Methods We performed a prospective,randomized controlled trial involving 364 low birth weight preterm infants with respiratory distress syndrome within 6 hours of birth.The infants were randomly assigned to NIPPV (n=188) or NCPAP (n=176) groups.Non invasive ventilation was initiated in the neonatal intensive care unit (NICU).The rate of mechanical intubation (within 3 days or 7 days),the use of pulmonary surfactant (PS),the rate of complications and mortality were compared between the two groups.Mann Whitney U,t and Chi-square tests were used for statistical analysis.Results The average time of invasive mechanical ventilation in NIPPV group were lower than that in NCPAP group[2.0 (1.0-4.0) d vs 7.0 (3.0-8.5) d,U=-3.457,P=0.001].The need for intubation and mechanical ventilation by day 3 and day 7 in the NIPPV group were less than those in the NCPAP group [day 3:4.8％ (9/188) vs 10.8％ (19/176),x2=4.621,P=0.032; day 7:9.0％ (17/188) vs 16.5％ (29/176),x2=4.551,P=0.033].In the NIPPV group,infants who got PS therapy was less than that in the NCPAP group [3.2％ (6/188) vs 8.5％ (15/176),x2=4.752,P=0.029].There was no significant difference in the fatality rate between the NIPPV and the NCPAP group [12.8％ (24/188) vs 10.8％ (19/176),P ＞ 0.05].There were no significant difference in the incidence of air leak,intracranial hemorrhage,periventricular leukomalacia,retinopathy of prematurity,necrotizing enterocolitis,patent ductus arteriosus,and bronchopulmonary dysplasia between the NIPPV group and the NCPAP group.Conclusion Among low birth weight prcterm infants with RDS,the early use of NIPPV reduces the need for PS,intubation and invasive ventilation compared with NCPAP.

OBJECTIVETo investigate the expression and significance of CD151 in pituitary adenomas.

METHODSThirty-six pituitary adenomas were collected immediately after surgery together with five normal pituitary tissue. Real time-PCR, Western blot and immunohistochemistry analysis were performed to detect the expression of CD151 mRNA and protein in thirty-six pituitary adenomases and five normal pituitary tissues.

RESULTSThe expression of CD151 in all pituitary adenomases was observed to be significantly higher than that in normal pituitary tissues by Western blot, real time PCR, and immunohistochemistry analysis (P < 0.01). The expression levels of protein and mRNA in invasive pituitary adenomas were much higher than those in non-invasive pituitary adenomas (P < 0.01).

CONCLUSIONThe results suggested that the expression of CD151 was closely correlated with malignant degree of pituitary adenomas, which indicated the expression of CD151 was intimately correlated with occurrence and development of pituitary adenomas. Detecting CD151 might be a vital index to predict prognosis of pituitary adenomas.

Adenoma ; metabolism ; Blotting, Western ; Humans ; Immunohistochemistry ; Pituitary Gland ; pathology ; Pituitary Neoplasms ; metabolism ; Prognosis ; RNA, Messenger ; Real-Time Polymerase Chain Reaction ; Tetraspanin 24 ; metabolism

OBJECTIVETo study the ECG features in children with dilated cardiomyopathy (DCM), and related factors for the occurrence of arrhythmia secondary to DCM.

METHODSData from 68 children with DCM from January 1998 to March 2011 were studied. The children were classified into three groups: severe arrhythmia (n=42), non-severe arrhythmia (n=20) and non-arrhythmia (n=6). Left ventricular end diastolic diameter (LVED), left ventricular ejection fraction (LVEF) and left ventricular fractional shortening (LVFS) were compared.

RESULTSAbnormal ECG results were found in all of the 68 children with DCM. Sinus tachycardia (91%) and ectopic pulsatile (86%) were common. LVED in the severe arrhythmia group (74±6 mm) was greater than that in the non-severe arrhythmia group (65±4 mm; P<0.05) and non-arrhythmia group (61±3 mm; P<0.05). LVED in the non-severe arrhythmia group was also greater than that in the non-arrhythmia group (P<0.05). LVEF and LVFS in the severe arrhythmia group were (30±11)% and (22±4)%, respectively, which were lower than those in the non-severe arrhythmia group［(37±12)% and (28±5)%, respectively］and non-arrhythmia group［(45±9)% and (34±7)%, respectively］(P<0.05). There were also significant differences in the LVEF and LVFS between the non-severe arrhythmia and non-arrhythmia groups (P<0.05).

CONCLUSIONSThe common abnormal ECG findings are sinus tachycardia and ectopic pulsatile in children with DCM. Arrhythmia is one of the main clinical manifestations of DCM. The occurrence of arrhythmia is associated with the left ventricular size and heart function.

Adolescent ; Arrhythmias, Cardiac ; etiology ; Cardiomyopathy, Dilated ; complications ; physiopathology ; Child ; Child, Preschool ; Electrocardiography ; Female ; Humans ; Infant ; Male

Objective To evaluate the effect of dynamic lung compliance ( Cydn)-guided positive end-expiratory pressure (PEEP) titration on lung injury in the patients undergoing robot-assisted radical prostatectomy. Methods Forty American Society of Anesthesiologists physical status Ⅱ or Ⅲ patients, aged 65-80 yr, with body mass index of 19-28 kg∕m2 , scheduled for elective robot-assisted radical prosta-tectomy under general anesthesia, were divided into 2 groups ( n=20 each) using a random number table method: control group (group C) and PEEP group (group P). Mechanical ventilation was performed ac-cording to preset parameters after tracheal intubation in group C, and PEEP was set by a double titration method after tracheal intubation and after pneumoperitoneum in group P. At 4 min after intubation (T1), 4 min, 1 h and 2 h after establishing pneumoperitoneum-Trendelenburg position ( T2-4 ) , and 1 and 30 min after extubation ( T5,6 ) in group C or at 4 min after completing the first PEEP titration ( T1 ) , 4 min, 1 h and 2 h after completing the second PEEP titration (T2-4) and T5,6 in group P, blood samples were collect-ed from the radial artery for determination of club cell protein 16, surfactant protein-D, tumor necrosis fac-tor-alpha and interleukin-6 concentrations in serum ( by enzyme-linked immunosorbent assay) . Results Compared with group C, the serum concentrations of club cell protein 16 at T2-6 and surfactant protein-D, tumor necrosis factor-alpha and interleukin-6 at T3-6 were significantly decreased in group P (P<0. 05). Conclusion Cydn-guided PEEP titration can reduce the lung injury in patients undergoing robot-assisted radical prostatectomy.

Objective To evaluate the effect of dynamic lung compliance ( Cdyn) -guided positive end-expiratory pressure (PEEP) titration on extravascular lung water in elderly patients undergoing robot-assisted radical prostatectomy. Methods Forty American Society of Anesthesiologists physical statusⅡ orⅢ patients, aged 65-80 yr, with body mass index of 19-28 kg∕m2 , scheduled for elective robot-assisted radical prostatectomy, were divided into 2 groups ( n=20 each) using a random number table method:control group (group C) and PEEP group (group P). In group P, immediately after endotracheal intuba-tion, immediately after establishing pneumoperitoneum-Trendelenburg position and after restoring the supine position, PEEP was set starting from the lowest PEEP allowed by the machine, increasing by 2 cmH2 O ev-ery 4 min until the maximum Cdyn was obtained. PEEP was not set in group C. Immediately after establis-hing the invasive blood pressure monitoring ( T1 ) , at 10 min after the first successful PEEP titration ( T2 ) , 10 min, 1 h and 2 h after the second successful PEEP titration ( T3-5 ) , 10 min after the third successful PEEP titration (T6), and 30 min after tracheal extubation (T7) in group P, or at T1, 10 min after intu-bation ( T2 ) , 10 min, 1 h and 2 h after establishing pneumoperitoneum-Trendelenburg position ( T3-5 ) , 10 min after restoring the supine position ( T6 ) and T7 in group C, blood samples were collected from the radial artery for blood gas analysis, and the oxygenation index was calculated. The B-line score was recor-ded at T1 and T7 . Results Compared with group C, the B-line score was significantly decreased at T7 , and the oxygenation index was increased at T5-7 in group P (P<0. 05). Conclusion Cdyn-guided PEEP titration can decrease the formation of extravascular lung water in elderly patients undergoing robot-assisted radical prostatectomy.

Toll - like receptors represents the first line of defense against foreign pathogens and play an essen-tial role in the innate immune response. Toll - like receptor 9(TLR9)is a major receptor mediating CpG DNA signal transduction,which can not only resist inflammation but also induce inflammatory damage. Studies show that the activa-tion of TLR9 which mediated by endogenous nucleic acid released during viral myocarditis (VMC)can cause the heart damage and be involved in the process of VMC. Further study on the role of TLR9 signal in VMC will provide a theoreti-cal foundation for further revealing the pathogenesis of VMC and seeking effective treatment.

OBJECTIVETo investigate the tissue distribution of the diallyl disulfide (DADS) and diallyl trisulfide (DATS) in solid lipid nanoparticles loaded garlic oil (GO-SLN) in rats.

METHODThe gas chromatography-electron capture detection (GC-ECD) method was established to determined the DADS and DATS simultaneously in the biological samples of rats after administration of 0.5 mL garlic oil injection or GO-SLN (containing about 10 mg garlic oil) via jugular vein cannula. The conditions for gas chromatographic separation were as follows. The oven temperature was set at 110 degrees C and maintained for 15 min. Temperatures at the injection port and detector were 180 degrees C and 300 degrees C, respectively. Ultra-pure nitrogen (purity > 99.999%, Shenyang Kerui Special Gases Co. Ltd., China) was used as a carrier gas and made-up gas at flow-rates of 1 mL x min(-1) and 60 mL x min(-1), respectively. All injections were carried out in the split injection mode with a split ratio of 1:10.

RESULTThe GC-ECD method was fit for determing the concentration of DADS and DATS in garlic oil. The distribution character of GO-SLN in rats had changed to some extent and the concentration of GO-SLN in tissues was higher than that of GO-Injection.

CONCLUSIONThe SLN can elevate the passive targeting of drugs and lengthen their action time in tissues.

Allyl Compounds ; analysis ; pharmacokinetics ; Animals ; Disulfides ; analysis ; pharmacokinetics ; Female ; Garlic ; chemistry ; Male ; Nanoparticles ; administration & dosage ; chemistry ; Plant Oils ; administration & dosage ; chemistry ; pharmacokinetics ; Rats ; Rats, Wistar ; Sulfides ; analysis ; pharmacokinetics

A new type of floating osmotic pump of dipyridamole was designed in this paper. Apparatus three (Chinese Pharmacopeia 2005, appendix XD) was employed for in vitro dissolution test in order to evaluate the release and floating behavior in a same experiment. The system was optimized using central composite design-response surface methodology; where similarity factor (f2) between the dissolution profile of prepared formulation and the target dissolution profile was taken as dependent factor, usage amount of polyoxyethylene (X1, mg), NaCl (X2, mg) and pore former (PEG4000, X3, %) were taken as independent factors. The optimization model was f2 = -29.3 + 2.35X3 - 0.123X1(2) - 0.046X2(2) + 0.145X1X2 (R = 0.996). It was found that the dissolution profile could match the target dissolution profile under the condition of weight gain 8%-9%, X1 (20-34), X2 (30-57), X3 = 50. It is also found that the minimum usage percentage of pore former is 35.1%. The prediction results of the optimization model were good in the experiments.
Administration, Oral ; Delayed-Action Preparations ; Dipyridamole ; administration & dosage ; chemistry ; Drug Compounding ; methods ; Drug Delivery Systems ; Osmosis ; Osmotic Pressure ; Platelet Aggregation Inhibitors ; administration & dosage ; chemistry ; Polyethylene Glycols ; chemistry ; Sodium Chloride ; chemistry ; Solubility ; Surface Properties

AIMTo investigate the in vitro influencing factors on drug release from matrices with sodium alginate as the hydrophilic polymer.

METHODSSodium alginate hydrophilic matrix tablets were prepared by direct compression method with theopylline as a model drug. The in vitro influencing factors on drug release behavior from matrices were studied by investigating the swelling, water uptake and erosion characteristics of pure sodium alginate matrices.

RESULTSThe results showed that drug release rate and drug release mechanism were both related to the viscosity of sodium alginate used in matrices, pH values and ionic strength of dissolution media and rotation speeds.

CONCLUSIONSodium alginate can be tailor-made to suit the demands of applicants in sustained delivery systems as a good candidate of hydrophilic polymer.

Alginates ; administration & dosage ; chemistry ; Chemistry, Pharmaceutical ; Delayed-Action Preparations ; Drug Carriers ; Drug Delivery Systems ; Glucuronic Acid ; administration & dosage ; chemistry ; Hexuronic Acids ; administration & dosage ; chemistry ; Hydrogen-Ion Concentration ; Solubility ; Tablets ; Theophylline ; administration & dosage ; chemistry ; Viscosity

The three-step dissolution experiment was established to investigate the in vitro release of budesonide colon-specific tablet and to elucidate the drug release mechanism by fitting to different mathematical models. The physiological parameters of stomach, small intestine and colon such as pH value, intestinal flora, specific organic enzyme, vermiculation and conveying time were mimicked to plot the in vitro dissolution, separately. Sample were taken at predetermined time intervals in 24 h and the accumulated drug releases were determined by using HPLC method. Drug release curves of the localization tablets were fitted to various mathematical models. It shows that no drug release was found in 2 h. About 5% release was determined after 6 h while 77.5% accumulated release was reached within 24 h. Drug release from the in house formulation fitted well into first-order model. The three-step dissolution method could be used to evaluate the colon-specific characteristics of budesonide colonic localization tablet. The drug release behavior of the localization tablet conforms to the drug release mechanisms of controlled porosity osmotic pump where osmotic pressure is the main driving force for controlled delivery of drugs.
Animals ; Anti-Inflammatory Agents ; administration & dosage ; pharmacokinetics ; Budesonide ; administration & dosage ; pharmacokinetics ; Colon ; metabolism ; Delayed-Action Preparations ; Drug Carriers ; Drug Compounding ; Drug Delivery Systems ; methods ; Excipients ; Hydrogen-Ion Concentration ; In Vitro Techniques ; Intestinal Secretions ; Models, Theoretical ; Rats ; Tablets