Objective To study the normal ranges and features for click-auditory brainstem responses of children in 3~5 years old.Methods Normal results of click-ABR from 132 normal children (224 ears)were ana-lyzed.The children were divided into three groups:Group A (74 ears from children of 3 years old),Group B (78 ears from children of 4 years old)and Group C (72 ears from children of 5 years old).The ABR data were statisti-cally analyzed by ANOVA with SPSS.Results At 80 dB nHL,the wave Ⅰ,Ⅲ,and Ⅴ latencies and intervals of wave Ⅰ- Ⅲ,and wave Ⅰ-Ⅴ of ABR for 3 -year old children were 1.24 ±0.09 ms,3.53 ±0.16 ms,5.39 ± 0.23 ms,2.30±0.15ms and 4.15 ±0.22 ms,respectively,and for 4 -year-old children,they were1.23 ±0.10 ms,3.52±0.39 ms,5.30±0.21 ms,2.28±0.39 ms and 4.07 ±0.22 ms,respectively.For 5 - year-old chil-dren,they were1.24±0.10 ms,3.67±0.63 ms and 5.34±0.19 ms,2.42±0.63 ms and 4.09±0.19 ms,respec-tively.The thresholds for 3-year children were 22.57 ±4.40 dB nHL,for 4 - year children,21.15 ±4.83 dB nHL,and for 5 - year children,21.11±3.48 dB nHL.Among three groups,only latency of wave V and interval of wave I-V had statistical differences,and a further analysis showed the statistical differences in Groups A and B. No statistical differences were observed in Groups B and C.The latency of wave I and thresholds of ABR for the children of different ages were not significantly different.Conclusion The resvits of this study suggest the brainstem may mature at 4 years old.

Objective:To study the relationship of retaining time of tympanic ventilation tube and aural complications. Method:Three-hundred-five patients(659 ears)with otitis media with effusion(OME)received tympanostomy tube insertion. The tube were removed 6-36 months after tube insertion. Then aural complications were recorded in different tube retaining time, followed with a statistic analysis. Result: Fifty-five tubes of 29 patients were removed at 1-6 months after tube insertion, with spontaneous extrusion 3.4%, blocked tube 10. 3%, intrusion into the middle ear O, granulation 'tissue O, cholesteatoma O, otorrhea 6.9%, perforation O. One hundred and ninty tubes of 96 patients were removed at 6-12 months after tube insertion,with spontaneous extrusion 7. 3%,blocked tube 15.6%, intrusion into the middle ear 1%, granulation tissue O, cholesteatoma O, otorrhea 5.2%,perforation O. Three huandred and eight tubes of 156 patients were removed at 12-24 months after tube insertion, with spontaneous extrusion 9%,blocked tube 12.8% ,intrusion into the middle ear 1.3%,granulation tissue 1.9% ,cholesteatoma 0.6%,otorrhea 2.5%,perforation was O. One hundred and sixty one tubes of 83 patients were removed at 24-36 months after tube insertion, with spontaneous extrusion 36.1%, blocked tube 53%, intrusion into the middle ear 6%, granulation tissue 3. 6%, cholesteatoma 2.4%, otorrhea 2.4%, perforation 2.4%. Conclusion:The occurrence of complication didn't increase with time going by when the ventilation tube retained less than two years. However, when the ventilation tube retained more than two years, the occurrence of spontaneous extrusion and blocked tube increased obviously.

The cell suspensions prepared from surgically resected hepatoma specimens were used to immunize BALB/c mice and, with the hybridoma technique, a battery of high affinity monoclonal anti-hepatoma antibodies were obtained which were designated HAbl8, Fll, E5 and A10 separately. Immunohistochimical staining showed that the above 4 antibodies possessed good selective reactivity with hepatoma tissue. After radioiodination of Fll, E5, A10, HAbl8 IgG and It's F(ab')_(2) fragments, the labelled reagents were employed for radioimmunoimaging in hepatoma-bearing nude mice and the in vivo detection appeared promising, with tumor/non-tumor ratios being 6.88, 5.14, 5.67, 5.15 and 14.47 respectively. The in vivo localization ablities of the antibodies seemed better compared to other similar findings published elswhere (Dunk AA, 1987). Also, ~(131) I -HAbl8 I gG and its radiolabelled fragments were utilized for radioimmunotherapy in hepatoma-bearing nude mice, with complete response rate and partial response rate being 42%(5/12) and 50% (6/12)respectively. When the HAbl8 conjugate with radioiodine was introduced for the in vivo imaging in hepatoma patients, a positivity rate of 86.5% (45/52)was witnessed, with the smallest tumor foci detected being only 0.5cm in diameter. In the in vivo targeting therapy with the immunoconjugate, a partial response rate of 69.6% (16/23) was obtained. In summary, the antibodies reported here have lended a novel regime for the present comprehensive therapy protocol of hepatoma.

0.05).Conclusion The peaked tympanogram of 1 000 Hz probe tone tympanometry in infants indicates normal results while flat tympanograms and other irregular shapes are abnormal.The middle ear functions are affected with flat tympanograms.The 1 000 Hz probe tone tympanometry is a valuable diagnostic tool to evaluate the middle ear functions in infants while 226 Hz probe tone tympanometry is considered inappropriate for infants.The 1000Hz tympanometry is more sensitive than ABR Wave Ⅰlatency and DPOAE responses.

Objective: To prepare the conjugate of supcrantigen (SAg) staphylococcal enterotoxin A (SEA) and monoclonal antibody (McAb) against human hepatocellular carcinoma HAbl8 F(ab' )_(2) fragment and to investigate the anti-human hepatoma effect of peripheral blood mononuclear cells (PBMC) targeted by HAbl8 F(ab' )i-SEA. Methods: McAb HAbl8 was extracted and its F(ab' )_(2) fragment was prepared with papain; the conjugate HAblS F(ab' )_(2)-SEA was prepared with N-succinimidyl-3-(2-pyridyldithio) propionate (SPDP); eveny collected peak after purification was identified with gel chromatography; the activity of antibody in the conjugate was identified with immunohistocheinical ABC method; the anti-hepatoma effect of PBMC targeted by HAbl8 F(ab' )_(2)-SEA was observed with MTT method. Results: The conjugate HAbl8 F(ab' )_(2)-SEA was prepared successfully and it had obvious effect of targeting PBMC to kill hepatoma cells, and this effect is correlated positively with the dose of HAbl8 F(ab')_(2)-SEA. Control groups had no such effect. Conclusion: Targeting therapy of hepatoma with McAb-SAg conjugate might be a kind of hopeful model of hepatoma im-munotherapy.

Objective: To explore influence of long-term oral valsartan-angiotensin II type 1 receptor blocker on ventricular arrhythmia after myocardial infarction (MI) in rabbits and its possible mechanism. Methods: A total of 24 New Zealand rabbits were randomly divided into sham operation group (n=8), MI group (n=8) and valsartan group (n=8) according to number table. Sham operation group only received thoracotomy without ligation of anterior descending branch of left coronary artery (LAD), while MI group and valsartan group received ligation of anterior descending branch of LAD. Valsartan group received valsartan gavage (10 mg•kg-1•d-1) since the second day after operation, three groups all were fed for 12 weeks. Mono active potential (MAP) of left ventricular myocardial cells of subendocardial myocardium（inner layer myocardium）, subepicardial myocardium（outer layer myocardium）and middle layer myocardium were recorded before MI and 12 weeks after MI, and times of provocative malignant arrhythmias were recorded on 12 weeks after MI in three groups. Results: 1. Ventricular tachycardia or fibrillation (VT/ VF) episodes were markedly decreased in VAL group than that in MI group on 12 weeks after MI [(3.1±0.8) vs. (12.7±1.5), P＜0.05]; 2. After MI 12 w, the action potential duration to 90% repolarization (APD90) of three-layer ventricular myocytes in MI group was prolonged than that before MI [（259.2±22.1）ms,（288.0±25.8）ms,（244.6±22.6）ms vs.（230.1±23.2）ms,（244.2±23.4）ms,（229.0±21.7）ms, P＜0.05 or＜0.01]；but there were no significant difference in APD90 of three layers ventricular myocytes between before and after MI in valsartan group (P>0.05 all); Compared with sham operation group and valsartan group, there was significant prolonged in transmural dispersion of repolarization (TDR) [(18.8±6.2) vs. (23.9±7.7) vs. (37.2±10.2), P<0.05 or＜0.01] in MI group; There was no significant difference in TDR between valsartan group and sham operation group (P>0.05). Conclusions: Long-term oral valsartan can significantly reduce malignant ventricular arrhythmia incidence in rabbits after MI, which may be related to improving TDR in rabbits after MI.

To study the chemical constituents from the root of Berchemia lineata (L.) DC., nine compounds were isolated from the EtOAc extract by using silica gel, RP-C18 silica gel column chromatography and preparative HPLC. Based on the spectroscopic analysis, their structures were identified as 5-hydroxy-7-(2'-hydroxypropyl)-2-methyl-chromone (1), (-)-(1'R, 2'S)-erythro-5-hydroxy-7-(1', 2'-dihydroxypropyl)-2-methyl-chromone (2), naringenin (3), eriodictyol (4), (+)-aromadendrin (5), (+)-taxifolin (6), (+)-catechin (7), (+)-epigallocatechin (8) and quercetin (9). Among them, compound 2 is a new chromone derivative. Compound 1 is a known chromone derivative and isolated from this genus for the first time. Compounds 3-9 are known flavonoids and isolated from this plant for the first time.

Objective:To study the effect and safety of transradial percutaneous coronary intervention (PCI).Meth-ods:Clinical data of 306 patients,who received PCI in our hospital from Mar 2012 to Jan 2014,were retrospectively analyzed,including radial group (n=153),and femoral group (n=153).Therapeutic effect,time and postoperative complications etc.were compared between two groups.Results:A total of 151 cases completed PCI successfully in radial group,the success rate was 98.7%;a total of 150 cases completed PCI successfully in femoral group,the suc-cess rate was 98.0%,there was no significant difference in success rate of operation between two groups,P >0.05. Compared with femoral group,there were significant reductions in hospitalization time [(8.0±3.5)d vs.(3.5± 1.7)d],treatment cost [(3.74±2.06) × 104 yuan vs.(2.61 ± 1.4) × 104 yuan],P <0.01 both,in incidence rates of postoperative coronary occlusion (3.92% vs.0%),arrhythmia (11.76% vs.1.31%),vascular spasm (6.54% vs.1.96%)and hematoma (7.19% vs.0.65%)etc.in radial group,P < 0.05 or < 0.01. Conclusion:Transradial PCI possesses better effect than that of transfemoral ,and it can reduce hospitalization time,cost and postoperative complications,which is worth extending.

Objective:To examine the temperatment of children with vocal fold nodules.Method:To compare the temperatment dimension and temperatmental types of 42 children with vocal fold nodules with 46 vocally normal children, using Chinese children's Temperament Problem Screening system(CCTPSs).Result:The children with vocal fold nodules differed significantly from the comparasion group in their temperament dimension's adaptability,intensity of reaction, mood value, persistency and temperatmental types.Conclusion:There are more difficult and slow-to-warm-up children in patients with vocal fold nodules than vocally normal children.

Objective To evaluate the teaching effectiveness of applying article structure analysis to improve medical graduate students' ability to read research articles.Methods 48 medical graduate students from basic medicine school of the Fourth Military Medical University were randomly and equally divided into the experimental group and control group.In the reading ability training of scientific research papers,the experimental group used the teaching of the structure analysis,while the control group used the collective self study.Before and after the training,the two groups of students were implemented a unified reading ability test and self reading ability evaluation survey,and after the training,the teaching satisfaction survey was conducted among the experimental group only.SPSS 16 was used to analyze the correlation data and Wilcoxon for signed-rank t est.Results After training the reading ability test results showed that reading ability score (P=0.013),consumed reading time score (P=0.003) and reading efficiency (P=0.004) of the experimental group were significantly higher than those of control group.The two groups of students' self-evaluation of the reading ability showed that after training,the scores of the students in the experimental group were higher than those in the control group,and the differences were statistically significant (P values were less than 0.05).The experimental group students' teaching satisfaction survey to article structure analysis showed students' score in 6 survey contents were greater than 3,namely degree of evaluation was more than general,among which,the score of four survey contents was more than 4,that is to achieve satisfied or very satisfied.Conclttsion Applying article structure analysis can significantly improve medical graduate students' ability to read research articles.