Objective:To evaluate the optical performance of two aspheric intraocular lenses (IOL) AcrySof IQ SN60WF and Proming A1-UV with identical negative spherical aberration values, using the optical bench OptiSpheric IOL R&D through an in vitro study. Methods:The optical performance of + 20.0 D blue-light filtering SN60WF and monofocal high-order aspheric non blue-light filtering A1-UV IOL was evaluated through cornea models with the spherical aberration of 0 μm (ISO-1) and + 0.28 μm (ISO-2) under apertures of 3.0 mm and 4.5 mm via the optical bench OptiSpheric IOL R&D.The modulation transfer function (MTF) and USAF 1951 resolution test chart were employed to measure the IOL with centering, decentration of 0.3, 0.5, 0.7, 0.9 and 1.1 mm, as well as tilt of 3°, 5°, 7°, 9° and 11°.The spectral transmittance of IOL was measured with the UV-3300 UV-VIS spectrophotometer.Results:Compared with the A1-UV IOL, the spectral transmittance of SN60WF for blue light with wavelengths of 400-500 nm was significantly reduced, which effectively reduced the passage of blue light.At an aperture of 3.0 mm, the MTF values at 100 lp/mm spatial frequency for the centered SN60WF and A1-UV were 0.576 and 0.598 under ISO-1 corneal measurement conditions, 0.564 and 0.563 under ISO-2 conditions.At an aperture of 4.5 mm, the MTF values were 0.238 and 0.404 under ISO-1 corneal measurement conditions, and 0.438 and 0.339 under ISO-2 conditions.The MTF values of A1-UV and SN60WF at 3.0 mm aperture and 100 lp/mm spatial frequency under ISO-1 corneal measurement conditions were larger than those under ISO-2 corneal measurement conditions.Under ISO-1 corneal measurement conditions with a 3.0 mm aperture, A1-UV had a better optical quality compared to SN60WF, whereas under ISO-2 corneal measurement conditions, the optical quality of both IOLs was similar.Under the 3.0 mm aperture, the MTF values of SN60WF and A1-UV at a decentration of 0.3 mm and 100 lp/mm spatial frequency were 0.414 and 0.571 under ISO-1 corneal measurement conditions, 0.438 and 0.512 under ISO-2 corneal measurement conditions, respectively.The MTF values of SN60WF and A1-UV at a tilt of 3° were 0.522 and 0.597 under ISO-1 corneal measurement conditions, and 0.532 and 0.531 under ISO-2 corneal measurement conditions.The MTF values and USAF resolution test chart of A1-UV had no significant change between the two corneal measurement conditions.When subjected to equal degrees of decentration or tilting, except for the ISO-1 corneal measurement conditions at a 4.5 mm aperture, the MTF values of A1-UV showed a gradual decline across various spatial frequencies compared to SN60WF.With the increase in aperture size, the impact of IOL decentration or tilting on MTF values and USAF 1951 resolution test chart became more notable for A1-UV relative to SN60WF.Conclusions:The SN60WF IOL effectively filters blue light within the wavelength range of 400-500 nm.However, when both IOL experience decentration greater than 0.3 mm or tilting beyond 3°, the optical quality of the IOL will decline.A1-UV has a distinct advantage over SN60WF in terms of resistance to both decentration and tilting-induced optical performance degradation in vitro.

Objective:To investigate the repeatability and correlation in tilt and decentration measurement of crystalline lens and intraocular lens (IOL) under non-mydriatic and mydriatic conditions using swept-source ocular coherence tomography CASIA2.Methods:A diagnostic test study was conducted.A total of 109 cataract patients (157 eyes) who received phacoemulsification with IOL implantation surgery in the Affiliated Hospital of North Sichuan Medical College from March to July 2020 were enrolled.The decentration and tilt of crystalline lens and IOL under non-mydriatic and mydriatic conditions were measured for three times by a single examiner using CASIA2 before and one week after surgery.The 0.5% compound tropicamide eye drops were used to dilate.Repeatability was evaluated by within-standard deviation, test-retest repeatability (TRT), coefficient of variation (CoV) and intraclass correlation coefficient (ICC). The correlation in decentration and tilt of crystalline lens and IOL between before and after mydriasis was assessed by Pearson correlation coefficient.This study adhered to the Declaration of Helsinki, and the study protocol was approved by an Ethics Committee of the Affiliated Hospital of North Sichuan Medical College (No.2020ER030-1). Written informed consent was obtained from all subjects before any medical examination.Results:The decentration of crystalline lens under non-mydriatic and mydriatic conditions was (0.217±0.112)mm and (0.220±0.110)mm, respectively, and the tilt was (5.017±1.422)° and (5.310±1.645)°, respectively.The decentration of IOL under non-mydriatic and mydriatic conditions was (0.245±0.136)mm and (0.250±0.145)mm, respectively, and the tilt was (5.144±1.345)° and (5.437±1.646)°, respectively.No significant difference was found between non-mydriatic and mydriatic conditions (all at P>0.05). Under both non-mydriatic and mydriatic conditions, the crystalline lenses of both eyes decentered and tilted toward the inferotemporal direction, and the IOL of right eyes decentered toward the inferior and tilted toward the inferotemporal direction, and the IOL of left eyes decentered and tilted toward the inferotemporal direction.Except the crystalline lens decentration, the measurement repeatability of crystalline lens tilt, IOL decentration and tilt in cataract patients before and after mydriasis was good, with ICC range in 0.815-0.984, TRT<50% and CoV≤14.840%.The measurement repeatability of crystalline lens decentration was poor, and the measurement repeatability of decentration axis, tilt and tilt axis of crystalline lens, and the repeatability of decentration and tilt of IOL were good in both eyes, with ICC range in 0.757-0.998, TRT<50% and CoV≤17.763%.There were good correlations in decentration, decentration axis, tilt and tilt axis of crystalline lens and IOL between non-mydriatic and mydriatic conditions (all r≥0.679, all at P<0.01). Conclusions:The measurement repeatability of decentration axis, tilt and tilt axis of crystalline lens and IOL, as well as the decentration of IOL by CASIA2 before and after mydriasis is good.The correlations of the measured parameters before and after mydriasis are good.

Objective:To explore the risk factors of urinary incontinence (UI) in China by using random forest algorithm, and to evaluate the predictive effect of each risk factor on UI.Methods:A baseline survey with a multistage stratified cluster sampling design was conducted between February 2014 and January 2016, and followed up by telephone from June to December 2018. A total of 55 477 adult women from six provinces of China participated the survey. According to the ratio of 1:1, under sampling method was used to randomly select the same number of women as UI from the non UI women. The data were randomly divided into training set and verification set according to 7:3. The training set was used to establish the random forest model, which including the candidate variables with P<0.2 in univariate analysis, and the verification set was used to verify the predictive effects. Results:A total of 30 658 patients (55.26%, 30 658/55 477) completed the follow-up, the median follow-up time was 3.7 years. Among the 24 985 women without UI at baseline, 1 757 (7.03%, 1 757/24 985) had UI at followed up, including 1 117 (4.47%, 1 117/24 985) with stress UI, 243 (0.97%, 243/24 985) with urgency UI and 397 (1.59%, 397/24 985) with mixed UI. When fixed the number of features as 2 and the number of random trees as 300 in the random forest model, the out of bag error rate estimation was the lowest; with such parameter settings, the classification accuracy was 64.3%, the sensitivity was 64.2%, and the specificity was 64.4%. The top10 predictive UI factors that screening by the variable importance measure in random forest model were obtained as follows: age, parity, delivery pattern, body mass index (BMI), menopause, history of diabetes, education level, history of pelvic surgery, regions, and marital status.Conclusion:We identified the top10 predictive UI factors that screening by the variable importance in random forest model as follows: age, parity, delivery pattern, BMI, menopause, history of diabetes, education level, history of pelvic surgery, regions, and marital status.

Objective This study aimed to explore the practice and effect of PAD Class (presentationassimilation-discussion Class) in the teaching of Medical Genetics.Methods We randomly selected a teaching class (117) for PAD Class and the other class (115) for lecture-style teaching.The two classes took the same exam in the end,with the PAD class taking an extra questionnaire on teaching conditions at the same time.The average scores of the two classes were tested by SPSS 19.0.Results The scores of the final exams for PAD and control classes were (72.21 ± 7.42) and (69.77 ± 8.89),differences were statistically significant (t=2.27,P=0.02).Questionnaire results showed that in PAD Class,68.81％ (75/109) of the students could complete homework,93.58％ (102/109) thought that PAD class had (obviously) increased their initiative and enthusiasm for learning,and 53.21％ (58/109) were very satisfied with their learning results.Conclusion PAD Class is suitable for the teaching of Medical Genetics and improves the teaching efficiency.

OBJECTIVE:To observe the clinical efficacy and safety of Kangfuxin solution combined with rhEGF solution for external use in the treatment of vitamin B12 deficiency atrophic glossitis. METHODS:Totally 94 patients with vitamin B12 deficien-cy atrophic glossitis in Xinjiang Production and Construction Corps Hospital during Jul. 2012-Jun. 2015 were divided into observa-tion group and control group according to random number table,with 47 cases in each group. Both groups received etiological treat-ment of vitamin B12 supplement. Control group was additionally given rhEGF solution for external use on tongue surface,qid. Based on control group,observation group was additionally given Kangfuxin solution and applied medical gauze saturated with liq-uid medicine to the affected area,more than 30 min each time,tid. Treatment course of 2 groups lasted for 4 week,a referral of the week. Clinical efficacies were compared between 2 groups as well as average pain indexes and lesion areas of tongue before and after treatment,and the occurrence of ADR. RESULTS:Cure rate(76.6% vs. 57.4%)and total response rate(97.9% vs. 83.0%) of observation group were significantly higher than those of control group,with statistical significance (P<0.05). Before treat-ment,there was no statistical significance in average pain indexes and lesion areas of tongue between 2 groups (P>0.05). 1-4 weeks after treatment,average pain indexes and lesion areas of tongue in 2 groups were significantly decreased,with statistical sig-nificance compared to before treatment (P<0.05). The average pain indexes of observation group were significantly lower than those of control group (3,4 weeks after treatment),and lesion areas of tongue was significantly smaller than control group (2-4 weeks after treatment),with statistical significance(P<0.05). No obvious ADR was found in 2 groups. CONCLUSIONS:For vita-min B12 deficiency atrophic glossitis,Kangfuxin solution combined with rhEGF solution for external use can significantly improve tongue lesion and have good analgesic effect and safety.

Objective: To investigate the clinical implications of p16 gene deletion in adult Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph⁺ ALL) . Methods: Retrospective analysis of clinical, immunophenotypic, cytogenetics, molecular characteristics and prognosis of 80 newly diagnosed Ph⁺ ALL patients with p16 deletion. Results: Of 80 adult Ph⁺ ALL, the prevalence of p16 gene deletion was 31.3%. p16 gene deletion carriers frequently accompanied with high WBC counts (WBC≥30×10⁹/L) and CD20 expression. The incidence of complex chromosome abnormality in p16 gene deletion group was higher than that in non-deletion group, with alternations in chromosome 7, 8, 19 and der (22) more frequently observed. There was no difference occurred between patients with or without p16 gene deletion in complete remission (CR) rate following induction chemotherapy combined with tyrosine kinase inhibitors (TKIs) . However, after three cycles of chemotherapy, the MMR and CMR rate in the p16 gene deletion group was lower than patients with wild-type p16 gene (P=0.034, P=0.036) . The p16 gene deletion patients showed no significant differences in MMR, CMR and relapse rate between Imatinib or Dasatinib plus chemotherapy (P>0.05) . Deletion of p16 gene was significantly associated with poor outcomes including worse overall survival (OS) (37.1% vs 54.1%, P=0.037) , lower disease free-survival (DFS) (12.4% vs 45.9%, P=0.026) , and increased cumulative incidence of relapse (P=0.033) . Among the 25 patients with p16 deletion, 14 underwent allo-HSCT and the median survival was 21 months, better than that of patients received chemotherapy alone (12 months) (P=0.030) . Conclusion This study indicated that deletion of p16 was associated with poor prognosis in adult Ph⁺ ALL, and the utility of second-generation TKI (Dasatinib) does not necessarily have an edge on efficacy over Imatinib, but allo-HSCT has the potential of elongating life expectancy. It is an important significance to define the status of p16 in Ph⁺ ALL for predicting prognosis and guiding therapy decision-making.

Objective To investigate the correlation of the polymorphisms of angiotensin Ⅱtype 1 receptor (AT1R)gene A1166C and angiotensinogen(AGT)gene M235T and blood biochemical indicators with essential hypertension(EH)in the male of Yi nationality in Yunnan province. Methods 92 hypertensive and 70 normotensive of Yi people were recruited in Yunnan province. Their basic information and blood biochemical indicators were obtained by questionnaire and standardized physical examination. The genes polymorphisms were determined by polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP)technique. Results(1)For the male EH patients of Yi nationality,1166C and 235T allele frequencies were 0.038 and 0.772. No significant differences in allele frequency or genotype frequency were observed between the two groups(P > 0.05).(2)The levels of TC,LDL-C and TG in EH were significantly higher than those in controls(P < 0.05). Conclusion The AT1R A1166C and AGT M235T polymorphisms were not related to the pathogenesis of EH in the male of Yi people. However,the high levels of TC,TG and LDL-C might be the risk factors of EH.

ObjectiveTo explore relationship between psychological resilience and life events of Tibetan nursing students receiving free vocational nursing education.Method The questionnaire of Symptom Checklist 90(SCL-90)and ASLEC were used in the survey among 120 nursing students to investigate the psychological resilience and life events and SPSS 17.0 was used to look into the correlations between them.Results The scores on psychological resilience of Tibetan nursing students was higher than the norm (P<0.05).There were negative correlations between life events and psychological resilience(P<0.05).Their psychological resilience was positively related to personal relations and health conditions(P<0.05)but negatively to learning pressure,punishment and losses (P<0.05).Conclusion The school and hospital should make teaching measures to psychologically support them in daily life to strengthen the abilities to handle failure and adjust to the society.

Objective To improve the teaching quality of medical genetics. Methods A medi-cal genetics questionnaire survey was designed and conducted among 2012 grade undergraduates of Kunming Medical University. The results of the questionnaire were statistically analyzed by Kruskal-wallis test. Results The students felt that, there were differences in the importance and difficulty of teaching sections (Z=395.818,Z=117.786,P<0.001). The practical abilities were different after learn-ing (Z=139.364,P<0.001). Most of the students had strong demand for clinical practice and genetic counseling, there were differences in the degree of demand in students of different majors (Z=8.432, P=0.038). Conclusion Method of adjusting teaching content and method was proposed and adding clinical practice in the future was recommend to improve the teaching quality .

Objective To evaluate the dosimetric characteristics of helical tomotherapy (HT),intensity-modulated radiation therapy (IMRT) and three-dimensional conformal radiation therapy (3D-CRT) for postoperative radiotherapy of rectal cancer.Methods Ten male patients with stage Ⅱ or Ⅲ middle or low position rectal cancer were selected retrospectively.All of the 10 patients underwent Dixon surgery and CT simulation orientation.The target volumes and normal organs were drawn in the CT images and the plans for HT,IMRT and 3D-CRT were designed.The prescribed dose was given 50 Gy in 25 fractions,covering at least 95％ of the planning target volume.Results All plans met the needs of the prescribed doses.The HT and IMRT plans met the needs of dose limit to organs at risk,however,the 3D-CRT plans failed to do that.The conformity indexes of HT,IMRT and 3D-CRT plans were 0.86,0.82 and 0.62,respectively (F =206.81,P ＜ 0.001),and the homogeneity indexes were 0.001,0.157,and 0.205,respectively (x2 =15.8,P ＜ 0.001).The 3D-CRT plans had larger volumes than the HT plans and IMRT plans in the high-dose regions such as pelvic V50,bladder V40,bowel V50 and femoral head D5 (P ＜ 0.05),but the differences between the HT plans and IMRT plans were not statistically significant (P ＞0.05).The V15 value of bowel of HT plans were higher than those of the IMRT and 3D-CRT plans (71.1％ vs.63.3％ and 67.7％,respectively).However,there was no significantly difference.Conclusions All of the HT,IMRT and 3D-CRT plans are able to meet the prescription dose requirement of the target regions of rectal cancer.The HT plans show the best dose homogeneity and target conformity,followed by the IMRT plans,and then the 3D-CRT plans.The HT plans meet the needs of all OARs slightly better than the IMRT plans.3D-CRT plans are simple and practical with poor protective ability toward the OARs.