Objective To investigate the auditory condition in adults with hearing-impairment and evaluate the outcome of the hearing aid. Methods The threshold of air-bone-conduction audiometry and binaural hearing aid in 91 adults were determined with pure tone audiometry,and their satisfaction to hearing aids were investigated with free interview. Results The threshold of hearing and hearing aid were positively correlated. The satisfaction did not significantly correlate with the threshold of hearing aid, but with the time of deprivation of hearing. The hearing threshold classification was better in the patients with the audiogram of flat, raising, slow down type than with audiogram of Shu type, which defined as hearing reacted only in 1 or 2 frequency. Conclusion It is important to improve the primary otology protection, as well as the rehabilitation from the hearing aids.

Objective To analyze and compare the accuracy and utility of determining sperm DNA integrity by sperm chromatin dispersion (SCD) test and acridine orange staining (AO) test.Methods The level of DNA fragmentation was determined by SCD test and AO test in 32 adult healthy fertile men and 27 idiopathic oligozoospermia (IO) patients.Sperm nuclei with large DNA dispersion halos or with mediumsized halos were normal and nuclei with small-sized halos or no halo were abnormal.The normal sperm DNA was double strands and stained by AO as green.The damaged sperm DNA was single strand,which were stained as green for native DNA and red for denatured DNA.Results The percentage of sperm nuclei with large halos,medium-sized halos,small-sized halos and no halo evaluated bv SCD test in IO patients were (49.9±13.8)%,(11.5±5.4)%,(11.9±6.1)%and(26.7±10.0)%,and they were(73.2±6.2)%,(14.7±6.3)%,(6.8±2.9)%and(5.3±2.2)%in healthy control group,respectively.There was significant difference between two groups(t=8.576,P＜0.01;t=2.083,P＜0.05;t=4.284,P＜0.01;t=11.823,P＜0.01).The percentage of sperm DNA fragmentation was (38.6±12.1)%in IO patients and was (12.1±5.2)% in fertile men,respectively.A statistically significant difference was found between IO patients and healthy control group under SCD test (t=11.995,P＜0.01).AO test showed no significant differences between IO patients and healthy control group (t=1.626,P＞0.05).The percentage of sperm DNA fragmentation evaluated by AO test in IO patients was (45.5 ±13.8)%,and it was (39.8±13.3)%in healthy control group.Conclusions Sperm DNA fragmentation may lead to male infertility.The SCD is effective in testing the sperm DNA fragmentation as a screening procedure to determine semen quality during basic infertility investigation for clinical use.

Objective To investigate the effects of cochlear implantation on residual hearing and to evaluate the potential impact of long -term electrical stimulations on residual hearing .Methods 58 hearing impaired children with cochlear implants were included in this study .All subjects could cooperate with behavioral audiometry .Audio-metric evaluations were carried out pre -implantation and 3 ,12 ,24 months post -implantation respectively .Of 58 subjects ,43 were followed up more than 1 year and 17 were followed up more than 2 years .Results All 58 subjects showed significant differences (P<0 .05) between pre- and 3 months post-implantation of residual hearing at the individual frequencies of 0 .25 ,0 .5 ,1 ,2 and 4 kHz .43 subjects followed up more than 1 year showed statistic differences (P<0 .05) between pre- and 3 months post -implantation ,pre- and 12 months post-implantation at 0 .25 ,0 .5 ,1 ,2 and 4 kHz respectively .Comparing 3 months with 12 months post -implantation ,there were sta-tistic differences at 0 .25 and 0 .5 kHz ,while no significant difference (P>0 .05) at 1 ,2 and 4 kHz .Of 17 subjects followed up more than 2 years ,there were significant differences (P<0 .05) between pre- and various return visits post-implantation .Post-implantation return visits ,there were significant differences between 3 months and 12 , 24 months at 0 .25 and 0 .5 kHz respectively ,not any significant differences on 1 ,2 and 4 kHz .There were no sig-nificant differences on each frequency between 12 months and 24 months post- implantation .Conclusion Residual hearing after cochlear implantation could decrease to some extent for various reasons .There were significant differ-ences between 3 and 12 months post-implantation at 0 .25 and 0 .5 kHz .Not any significant differences were ob-served between 12 months and 24 months post-implantation at each frequency .

Objective To investigate the association between DNA methyltransferase 3B(DNM T3B) promoter single nucleotide polymorphism(SNP) with susceptibility to gastric cancer (GC) in Han population of Suqian region .Methods A total of 233 pa-tients with gastric cancer were recruited into the study group ,208 healthy persons were recruited in the control group .Genomic DNA was extracted from peripheral blood ,and the frequency distribution of -579G> T locus in DNMT3B promoter region was de-tected by polymerase chain reaction with restriction fragment length polymorphism (PCR-RFLP) .Results The distribution of TT genotypes compared with GT +GG in all the two groups were significantly different (χ2 =6 .517 ,P<0 .05) .When stratified by age , there was significant difference between TT and GT + GG genotypes at the age range ≥60 years(χ2 = 4 .728 ,P< 0 .05) .When stratified by gender ,there was no significant difference between different gender groups (χ2 = 3 .541 ,P> 0 .05 ;χ2 = 3 .676 ,P>0 .05) .Conclusion The DNMT3B -579G> T is associated with the genetic susceptibility of gastric cancer .It might be a risk fac-tor of gastric cancer .