Objective The purpose of this study is to compare the most comfortable levels and neural re-sponse imaging threshold between children of cochlear implants with large vestibular aqueduct syndrome and normal inner ears. Methods Thirty-eight implanted children participated in this study and were divided into two groups. Group A consisted of 32 patients with normal inner ears and group B 6 patients with radiographically proven large vestibular aqueduct syndrome. All of the patients were the recipients of the cochlear implants by Advanced Bionics. The initial time for the first programming session was approximately one month after surgery. The psychophysical tests included M- level tests. Programming techniques used in the test were suitable for the age of patients. Sound-Wave 1.4 software was used to test tNRI. Results Using the rank sum test, M-level and tNRI of electrode 3,7,11 and 15 did not differ significantly between group A and B(P>0. 05). Conclusion The parameters of mapping are not significantly different between the implanted children with large vestibular aqueduct syndrome and normal inner ear. The management and procedures of mapping used to the subjects with normal inner ear can be applied to the children with large vestibular aqueduct syndrome.

Objective To investigate the survival profile of the intradermally injected mouse autologous skin fibroblasts and the changes of the collagen fibers by using green fluorescent protein labeling and two-photon fluorescence microscopy. Methods The cultured cells were transfected by EGFP lentivirus, and then the cells were injected into the corresponding mouse skin. Biopsy was taken from the animals after 1 and 2 months. The specimens made serial frozen sections, the survival profile of the injected cells and the changes of the collagen fibers were observed by two-photon fluorescence microscopy. The collagenic area and dermal thickness were measured with image analysis software, and statistical analysis was also carried out. Results Two-photon fluorescence microscopy showed clear images of the injected cells and collagen fibers. Both the area of collagen fibers and the dermal thickness were significantly increased in injected cells after 2 months (P<0.05), however, there were no difference between injected cells and control after 1 mouth (P>0.05). Conclusions Autologous cultured fibroblasts could survive in a long time after transplantating into the skin, and collagen could be newly produced, the depth of dermis increases, which provides a possibility to treat mini-defects of the tissue.

Objective To investigate clinical effect of reattribution-cognitive-pharmacy model (RCPM) in the treatment for irritable bowel syndrome(IBS). Methods 125 subjects with diarrhea predominant irritable bowel syndrome (IBS-D) were divided into two groups randomly. 62 patients in group A were treated with 10 ～ 20 mg of paroxetine without any other medication or psychological interview and 63 patients in group B received RCPM with interviewing once a week for 6 sessions and took 10 ～ 20 mg of paroxetine in the same way as group A after a week. The effect was evaluated at the end of 4 weeks and 12 weeks by a questionnaire. Results At the end of 4 weeks,29 patients in group A reported a reduction in abdominal pain,and 28 reported a reduction in stool frequency ,and 12 patients stopped taking paroxetine because of worrying about those side effect . In group B 48 reported a reduction in abdominal pain ,and 42 reported a reduction in stool frequency ,and 3 patients stopped taking paroxetine. At the end of 12 weeks,36 patients in group A reported a reduction in abdominal pain ,and 30 reported a reduction in stool frequency,and 14 patients stopped taking paroxetine because of worry about those side effect. In group B,54 cases reported a reduction in abdominal pain,and 45 reported a reduction in stool frequency,and 5 patients stopped taking paroxetine because of no obvious improvement. Conclusion RCPM can alleviate the abdominal pain and bowl movement frequency of IBS-D,and it seems better than paroxetine treatment alone. RCPM can improve compliance of paroxetine in patients with IBS-D.

Objective To evaluate the value of reducing radiation dose with decreased size of ECG-pulsing windows and influence on image quality in dual-source CT coronary angiography. Methods 120 patients with stable heart rate(HR) were divided into four groups according to HR and the rang of ECG-pulsing windows in dual-source CT coronary angiography: HR ＜ 70 bpm and 61% ～ 77% R-R interval of ECG-pulsing windows, HR ＜ 70 bpm and 25% ～ 80% R-R interval of ECG-pulsing windows,HR ＞ 80 bpm and 31% ～47% R-R interval of ECG-pulsing windows, and HR ＞ 80 bpm and 25% ～ 80%R-R interval of ECG-pulsing windows was employed, respectively. The radiation dose parameters were recorded and image quality scores were performed. The image quality and radiation dose between two slow HR groups and between two fast HR groups were compared respectively. Result The effective doses were (7.06 ± 2. 13 ), ( 11.34 ± 3.65 ), ( 6. 67 ± 1.97 ) and ( 9. 92 ± 3. 15 ) mSy for four groups, respectively.The effective dose was decreased by 37.74% for slow HR and by 32. 76% for fast HR using narrow ECG-pulsing windows. There was no difference on image quality between two slow HR groups and two fast HR grouvs. Concluslons The proper application of narrow ECG-pulsing windows can reduce radiation exposure significantly to stable slow or fast HR patients in dual-source CT coronary angiography withont sacrificing the image quality.

Objective To explore the rules of early pregnancy related hormone changes in different pregnancy outcomes.Methods Three hundred and fourteen women at early pregnancy women were selected as our subjects.And they were followed up until 3 months of gestation.chemiluminescence analysis was used to test serum human chorionic gonadotropin (β-HCG),progesterone,estradiol and testosterone levels all pregnant women.According to the pregnancy outcome,clinical symptom and body mass index,all subjects were divided into normal and abnormal group.Results Among 314 cases of early pregnancy women,the normal pregnancy group was 53.18％ (167/314) and the abnormal pregnancy were 46.82％ (147/314).While in abnormal pregnancy group,women with the threatened abortion and continues pregnancy were 102 cases(69.39％),with inevitable abortion group were 29 cases (19.73％),and with embryos diapauses were 16 cases (10.88％).Serum estradiol level of cases in normal pregnancy group was (3104.6 ± 1507.1) pmol/L,higher than that in threatened abortion and continues pregnancy,threatened abortion group and inevitable abortion group((2 361.0 ±1 057.9) pmol/L,(1 250.0 ±624.5) pmol/L,(1 465.7 ±724.4) pmol/L)),and the differences were statistically significant(P ＜ 0.05).In normal pregnancy group,the level of serum β-HCG,estradiol and testosterone were positively correlated with gestational age (r =0.57,0.62 and 0.24 ; P ＜ 0.05).However,progesterone levels had no correlation with gestational age (r =0.15,P =0.06).Conclusion Dynamic detection of early pregnancy can guide clinicians to colytic therapy.

Objective To investigate the clinical value of multiple-slice spiral CT (MSCT) in identifying apical hypertrophic cardiomyopathy (AHCM) with giant negative T wave.Methods Sixteen patients with AHCM and giant negative T wave (AHCM group) underwent MSCT,electrocardiogram,echocardiography,coronary angiography and left ventriculography.Thirty patients without myocardial hypertrophy were enrolled as control group.Measurement results of two groups were compared.Results MSCT confirmed all patients with AHCM,but echocardiography missed 10 patients.In the end of diastole phase,left ventricular apical thickness (LVA) was (21.3 ± 3.6) mm and LVA/left ventricular posterior wall thickness (LVPW) was 2.2 ± 0.4 in AHCM group,which was (8.5 ± 1.6) mm and 0.9 ± 0.2 in control group.The level of LVA and LVA/LVPW in AHCM group were significantly higher than those in control group (P ＜0.01).Conclusion MSCT is a accurately diagnostic modality for AHCM with giant negative T wave,and the cardiac anatomy,function and coronary artery are also assessed simultaneously.

Objective To analyze the hidden blood loss following primary total hip arthroplasty (THA) and put forward corresponding treatment measures.Methods A retrospective study was done on the 138 patients with hip disease managed with THA for the preliminary unilateral replacement from January 2009 to January 2011.There were 48 males and 90 females,at age range of 45-71 years (mean,62 years).The pre-and post-operative blood routine and intra-and post-operative blood loss and transfusion were analyzed and hidden blood loss during peri-operation period was evaluated.Results All the patients were trnsfused with autologous blood intra-operatively.Intra-operative blood loss was (495 ± 105) ml and postoperative drainage volume was ( 121 ±29) ml.In addition,116 patients were given red cell suspension (RCS) and blood plasma to raise the level of hemoglobin and the RCS transfusion volume was (600 ± 225) ml.The total blood loss was (1 521 ±156) ml including hidden blood loss of (822 ±96) ml (57.2％).No obvious differences were observed in the indicators between males and females.Conclusions Hidden blood loss is an important factor that affects the prognosis of the patients treated by THA.In order to secure their safety in perioperative period and benefit their recovery,assessment of the amount of bleeding in THA should fully take the hidden blood loss into consideration and prompt treatment measures should be taken to fully and effectively recover their effective circulation blood volume.

Objective To investigate the molecular mechanisms of glial cell derived neurotrophic factor in promoting proliferation of spermatogonial stem cell.Methods RNAi expression vectors,targeted at GDNF,were constructed and transfected into SSCs from 5 to 7 days old mice.The SSCs with highest effectiveness of GDNF interfere was set as study group.And the SSCs without GDNF interfere was considered as control group.The ELISA method was used to compare the proliferative rate between study group and control group.Flow cytometry,RT-PCR were used to detect the expression of GDNF,RTKs,Fyn and FAK's mRNA,and the apoptosis of SSCs.Results From 1 to 4 days after transinfection,the absorbable A value in study group was 0.45 ± 0.02,0.68 ± 0.03,1.12 ± 0.03,2.24 ± 0.04,respectively.Meanwhile,the same item in control group was 0.46 ± 0.03、0.73 ± 0.02、1.32 ± 0.05、1.15 ± 0.06,respectively (P ＜ 0.05).There were significant different between experiment groups (25.43 ± 1.91) ％ and control group (5.61 ± 0.16)％ in the apoptosis rates of SSCs (P ＜ 0.05).Significant differences were noted between experimental group and control group(P ＜ 0.05).The mRNA expression rates of GDNF was (12.32 ± 1.22) ％ in study group and (54.25 ± 1.34)％ in control group (P ＜0.01).The mRNA expression rates of RTKs and Fyn and FAK in study group and control group were (16.24 ± 1.35)％ vs (45.35 ± 1.37)％,(18.32 ±1.34)％ vs (38.37 ± 1.55)％,(20.04 ± 1.65)％ vs (43.27 ± 1.28)％,respectively (P ＜0.05).Conclusions The glial cell line derived neurotrophic factor was important in course of SSCs' proliferation,which may up-regulating the expression of RTKs,Fyn and FAK.

Objective To explore the feasibility of dual-source CT coronary angiography (CTCA) using 80 kV tube voltage setting in patients with low body mass index (BMI).Methods A total of 240 patients with suspected coronary artery disease (BMI range 18.6-21.5 kg/m2) underwent dual-source CTCA.They were randomly assigned to group A (120 kV tube voltage),B (100 kV tube voltage) and C (80 kV tube voltage) based on a random number table.The contrast media dose,volume CT dose index (CTDIvol),dose length product (DLP),and effective dose (ED) were evaluated for each patient.Image noise,CT value,contrast,signal-to-noise ratio (SNR),contrast-to-noise ratio (CNR) and figure of merit (FOM) of coronary artery were all evaluated.Tie image quality of coronary artery was assessed with a threepoint scale (3 points:excellent,2 points:general,1 point:poor).Scan length,CTDIvol,DLP,ED,and contrast media dose for patients,image noise,CT value,contrast,SNR,CNR,and FOM of coronary artery were all analyzed using one-way ANOV4 analysis for 3 groups.Time windows of ECG-pulsing protocol were analyzed using x2 test,and the image quality scores of coronary artery were analyzed using Kruskal-Wallis test.Results There were no differences in scan length and Time windows of ECG-pulsing protocol among 3 groups (scan length F =2.58,P ＞ 0.05,Time windows of ECG-pulsing protocol x2 =0.77,P ＞ 0.05).The average contrast media doses were (82.0 ± 6.4),(76.8 ± 6.1),and (59.1 ± 3.5) ml,the average CTDIvol were(27.5 ±6.2),(18.7 ±4.4),and(11.4 ±2.4)mGy,the average DLPs were (427.7 ±92.4),(295.4 ± 77.1),and (183.9 ± 41.3) mGy · cm,and the average EDs were (6.1 ± 1.3),(4.1 ± 1.1),and (2.6 ± 0.6) msy for group A,B and C,respectively.There were statistical differences in contrast media dose,CTDIvoI,DLP,and ED among 3 groups (the F values for contrast media dose,CTDIvol,DLP,and ED were 383.08,248.13,221.05,and 234.81,respectively,all P ＜0.01).Compared to group A and B,the contrast media dose in group C decreased 27.9％ and 23.0％,and the ED decreased 57.4％ and 36.6％,respectively.The average image noise was (22.6 ±2.2),(26.1 ±3.0),and(29.1 ±3.4)HU for group A,B and C,respectively,and there was statistical difference in image noise among 3 groups (F=101.32,P ＜0.01).The average CT value,contrast,SNR,CNR and FOM were (438.3 ± 66.3)HU,(517.3 ± 67.8)HU,19.5 ±2.8,23.0 ±3.0,and 92.9 ± 31.0 in proximal RCA and (440.2 ±59.9) HU,(509.5 ± 62.6) HU,19.6 ±2.6,22.7 ±2.9,and 90.1 ±29.7 in LMA for group A,(534.2 ± 68.8) HU,(628.9 ±70.0) HU,20.7 ± 3.2,24.3 ± 3.6,and 157.6 ± 59.8 in proximal RCA and (528.4 ± 61.2) HU,(607.9 ± 71.2) HU,20.4±3.0,23.5 ±3.4,and 147.6 ±57.6 in LMA for group B,and (602.1 ±78.8)HU,(696.8 ±83.3) HU,20.8 ± 2.9,24.1 ± 3.2,and 239.3 ± 74.8 in proximal RCA and (592.5 ± 72.3) HU,(671.8 ±82.5) HU,20.5 ± 2.5,23.2 ± 3.0,and 221.8 ± 65.7 in LMA for group C,respectively.The CT value,contrast,SNR,CNR and FOM of coronary artery for group C did not decrease (the F values for CT value,contrast,SNR,CNR and FOM were 106.06,119.90,4.69,3.70,and 127.50 in proximal RCA,and 111.79,101.57,2.68,1.39,and 123.00 in LMA,and the P values were ＜0.01,＜0.01,＜0.05,＜0.05,and ＜0.01,in proximal RCA,and ＜0.01,＜0.01,＞0.05,＞0.05,and ＜0.01,in LMA,respectively).Image quality was rated as excellent,general and bad for 631,330,and 37 segments in group A,640,323,and 41 segments in group B,and 615,348,and 45 segments in group C,respectively,there was no significant difference in image quality scores among 3 groups (x2 =1.90,P ＞ 0.05).Conclusion For the patient with BMI≤21.5 kg/m2,dual-source CTCA with 80 kV tube voltage setting can be used to diagnose coronary artery disease and the contrast media lose and radiation dosage can be reduced obviously.

OBJECTIVE:To optimize the extraction technology of oleanolic acid from Elsholtzia bodinieri V.METHODS:The extraction technology was optimized by orthogonal-test using microwave-assisted dynamic extraction method with oleanolic acid as index;And the content of oleanolic acid was determined by TLC-spectrophotometry.RESULTS:The opti-mum extraction condition was described as follows,the microwave power is600W with methanol as extracting solvent,the flow rate was8ml/min and the inner diameter of extraction tube was10mm.CONCLUSIONS:The microwave-assisted dynamic extraction method is simple,safe,rapid,accurate and with high extraction yield.The optimized extraction technology is stable and feasible,and suitable for industrialized production.