Objective:To investigate the speech-evoked brainstem response (speech-ABR) of normal young people under different recording periods,which can provide the experimental evidences for researches on the stability of speech-ABR and promote its applications in clinical researches.Methods:40 healthy young people were randomly divided into two groups,which were tested following the same protocol at different time of two months interval.Latencies and amplitudes of the feature peaks in these groups were compared and the rates of appearance (detection rate) of the feature peaks were analyzed statistically.Results:Speech-ABRs were recorded successfully in two groups.The latencies and amplitudes of feature peaks in these groups were not different statistically,and the detection rates of V,A,C and F peaks were higher than others.Conclusion:The speech-ABRs of the two groups are stable,and the V,A,C and F peaks can be used as important indicators of clinical observation,showing that Speech-ABR is a promising tool in the study of Speech perception mechanism.

OBJECTIVE:To observe the efficacy and safety of Guizhi fuling capsule combined with leuprolide acetate in the treatment of endometriosis (EMS) after laparoscopicsurgery. METHODS:87 EMS patients were randomly divided into control group(44 cases)and observation group(43 cases). Control group received EMS resection under laparoscope,3.75 mg Leuprolide acetate for injection was given in the first day of postoperative first menstruation by intramuscular injection,once a day. Observa-tion group additionally received 0.93 g Guizhi fuling capsule,3 times a day. The treatment course for both groups was 6 months. Clinical efficacy,estradiol(E2),follicle stimulating hormone(FSH),luteinizing hormone(LH)and prolactin(PRL)levels before and after treatment,recurrence after 6 months and the incidence of adverse reactions in 2 groups were observed. RESULTS:The to-tal effective rate in observation group was significantly higher than control group,recurrence rate was significantly lower than con-trol group,the differences were statistically significant (P<0.05). Before treatment,there were no significant differences in E2, FSH,LH and PRL in 2 groups(P>0.05);after treatment,E2,FSH,LH and PRL in 2 groups were significantly lower than be-fore,and E2,FSH and LH in observation group were lower than control group,the differences were statistically significant (P<0.05),but there was no significant difference in PRL in 2 groups (P>0.05). And there was no significant difference in the inci-dence of adverse reactions in 2 groups (P>0.05). CONCLUSIONS:After laparoscope resection,Guizhi fuling capsule combined with leuprolide acetate can effectively improve efficacy,reduce sex hormone level and recurrence rate,and do not increase the inci-dence of adverse reactions in the treatment of EMS.

Objective To analyze ultrasonographic imaging feature of primary fallopian tube carcinoma (PFTC) and the reasons for misdiagnosis.Methods Clinical data and ultrasonographic imaging feature of 41 patients with pathologically confirmed PFTC were retrospectively analyzed from August 2008 to November 2016 in General Hospital of Chinese People's Liberation Army.Results Ultrasonographic characteristics of 41 PFTC cases:(1) Type Ⅰ (6 cases),the cystic adnexal mass with single or multiple papillary projections and circuity tubular structures,color Doppler flow imaging showed abundant blood flow signal inside the nipples.(2) Type Ⅱ (2 cases),the sausage shaped complex adnexal mass showed clear boundary,the cystic area that lined along the fallopian tube was around or at the side of the solid part,color Doppler flow imaging showed rich or abundant blood flow signal inside the solid part.(3) Type Ⅲ (13 cases),the sausage shaped hypoechoic adnexal mass showed clear boundary,color Doppler flow imaging showed rich or abundant blood flow signal inside the mass.(4) Type Ⅳ (14 cases),the single or multiple adnexal masses showed irregular surface,with predominant solid components,color Doppler showed rich or abundant blood flow signal inside the tumor;the normal ovarian structure was not detected in unilateral or bilateral adnexa area;and one or more signs of metastasis were found,such as the peritoneal thickening of vesicouterine pouch,uterine rectum pouch and omental,metastasis to other distant organs,and so on.(5) Type Ⅳ (6 cases),only hydrosalpinx or no abnormal ultrasonographic changes in the adnexal area.Nineteen (46.3％,19/41) cases were correctly diagnosed by preoperative ultrasonography,while 22 (53.7％,22/41)cases were missed or misdiagnosed.Conclusions Ultrasonography imaging of PFTC has certain characteristics,but it tends to be missed or misdiagnosis when the lesion is small.Ultrasound can show the location,size,internal echo,blood flow and distant metastasis of lesion,which can be taken as the first choice of imaging methods for preoperative diagnosis and postoperative follow-up of PFTC.

Objective To explore the track of professional identity of undergraduate nursing students,so as to provide reference for improving their professional identity and reducing the brain drain of nursing students.Methods In-depth interviews were conducted with 12 undergraduate nursing students,and the data were analyzed by grounded theory.Results One core category is the track of professional identity,and five categories are the reasons of major choice,inherent professional cognition,systematic learning improvement,practical experience change and career choice inclination.Conclusion Inherent professional cognition may run through all stages of nursing stu-dents'professional identity.Systematic study and clinical practice will change nursing students'professional iden-tity,and professional identity is no longer a sufficient and necessary condition for determining nursing students'career choice.Nursing educators and nursing managers should understand the track of nursing students'profes-sional identity,improve their professional identity,reduce the brain drain of nursing talents and promote the stabili-ty of nurses.

Peripherally inserted central catheter (PICC) has the advantages of long-term indwelling, avoiding repeated puncture and effectively protecting peripheral blood vessels, and has been widely used in various clinical fields. The correct position of the PICC tip is an important guarantee for the safe use of catheter. If malposition occurs, it will shorten the catheter indwelling time, increase the incidence of complications, and even life-threatening in severe cases. This article summarizes the methods of PICC tip positioning and the related factors of malposition. In this article, in addition to conventional positioning methods, new positioning techniques such as Sherlock 3CG tip confirmation system and VasoNova vascular positioning system (VPS) combined with electrocardiogram (ECG) are proposed. This article points out that factors such as vascular factors, respiratory motion and intrathoracic pressure changes can lead to changes in the position of the PICC tip, in order to provide a reference for clinical medical and nursing staff to determine the position of the catheter tip and prevent catheter tip malposition.

Objective To explore the track of professional identity of undergraduate nursing students,so as to provide reference for improving their professional identity and reducing the brain drain of nursing students.Methods In-depth interviews were conducted with 12 undergraduate nursing students,and the data were analyzed by grounded theory.Results One core category is the track of professional identity,and five categories are the reasons of major choice,inherent professional cognition,systematic learning improvement,practical experience change and career choice inclination.Conclusion Inherent professional cognition may run through all stages of nursing stu-dents'professional identity.Systematic study and clinical practice will change nursing students'professional iden-tity,and professional identity is no longer a sufficient and necessary condition for determining nursing students'career choice.Nursing educators and nursing managers should understand the track of nursing students'profes-sional identity,improve their professional identity,reduce the brain drain of nursing talents and promote the stabili-ty of nurses.

Objective To explore the track of professional identity of undergraduate nursing students,so as to provide reference for improving their professional identity and reducing the brain drain of nursing students.Methods In-depth interviews were conducted with 12 undergraduate nursing students,and the data were analyzed by grounded theory.Results One core category is the track of professional identity,and five categories are the reasons of major choice,inherent professional cognition,systematic learning improvement,practical experience change and career choice inclination.Conclusion Inherent professional cognition may run through all stages of nursing stu-dents'professional identity.Systematic study and clinical practice will change nursing students'professional iden-tity,and professional identity is no longer a sufficient and necessary condition for determining nursing students'career choice.Nursing educators and nursing managers should understand the track of nursing students'profes-sional identity,improve their professional identity,reduce the brain drain of nursing talents and promote the stabili-ty of nurses.

Objective To explore the track of professional identity of undergraduate nursing students,so as to provide reference for improving their professional identity and reducing the brain drain of nursing students.Methods In-depth interviews were conducted with 12 undergraduate nursing students,and the data were analyzed by grounded theory.Results One core category is the track of professional identity,and five categories are the reasons of major choice,inherent professional cognition,systematic learning improvement,practical experience change and career choice inclination.Conclusion Inherent professional cognition may run through all stages of nursing stu-dents'professional identity.Systematic study and clinical practice will change nursing students'professional iden-tity,and professional identity is no longer a sufficient and necessary condition for determining nursing students'career choice.Nursing educators and nursing managers should understand the track of nursing students'profes-sional identity,improve their professional identity,reduce the brain drain of nursing talents and promote the stabili-ty of nurses.

Objective To explore the track of professional identity of undergraduate nursing students,so as to provide reference for improving their professional identity and reducing the brain drain of nursing students.Methods In-depth interviews were conducted with 12 undergraduate nursing students,and the data were analyzed by grounded theory.Results One core category is the track of professional identity,and five categories are the reasons of major choice,inherent professional cognition,systematic learning improvement,practical experience change and career choice inclination.Conclusion Inherent professional cognition may run through all stages of nursing stu-dents'professional identity.Systematic study and clinical practice will change nursing students'professional iden-tity,and professional identity is no longer a sufficient and necessary condition for determining nursing students'career choice.Nursing educators and nursing managers should understand the track of nursing students'profes-sional identity,improve their professional identity,reduce the brain drain of nursing talents and promote the stabili-ty of nurses.

Objective To explore the track of professional identity of undergraduate nursing students,so as to provide reference for improving their professional identity and reducing the brain drain of nursing students.Methods In-depth interviews were conducted with 12 undergraduate nursing students,and the data were analyzed by grounded theory.Results One core category is the track of professional identity,and five categories are the reasons of major choice,inherent professional cognition,systematic learning improvement,practical experience change and career choice inclination.Conclusion Inherent professional cognition may run through all stages of nursing stu-dents'professional identity.Systematic study and clinical practice will change nursing students'professional iden-tity,and professional identity is no longer a sufficient and necessary condition for determining nursing students'career choice.Nursing educators and nursing managers should understand the track of nursing students'profes-sional identity,improve their professional identity,reduce the brain drain of nursing talents and promote the stabili-ty of nurses.