1.The short-term effect of using VISULYZE generated nomogram to assist SMILE for myopia and astigmatism correction
Yan ZHAO ; Wenjia CAO ; Di SHEN ; Jun CAI ; Xiaohuan MA ; Wei WEI
Recent Advances in Ophthalmology 2025;45(10):805-809
Objective To evaluate the short-term efficacy of the VISULYZE software generated nomogram in assis-ting small incision lenticule extraction(SMILE)for the correction of myopia and astigmatism.Methods Non-randomized controlled trial.Patients who underwent SMILE surgery with the original nomogram,assisted by the same surgeon at the Laser Myopia Treatment Center of Xi'an NO.1 Hospital between February 2023 and January 2024,were included.A total of 52 patients(102 eyes)of myopic astigmatism with 3-month postoperative follow-up were collected.VISULYZE software was then used to generate a new nomogram.Subsequently,a total of 40 patients(70 eyes)with myopic with-the-rule astigmatism and a preoperative cylinder of ≤2.00 D,who underwent SMILE assisted by the new nomogram at the same center between August and November 2024,were enrolled.Among them,50 eyes had a target refraction of plano and were assigned to the experimental group.In addition,from the database of patients who underwent SMILE assisted by the origi-nal nomogram,42 patients(70 eyes)with myopic with-the-rule astigmatism and a cylinder of ≤2.00 D were screened,of which 51 eyes had a target refraction of plano,and these were assigned to the control group.The postoperative visual and refractive outcomes of both groups were compared at 3 months.Astigmatism results were analyzed using Alpins vector analysis.Results At 3 months postoperatively,among eyes with a target refraction of plano,50 eyes(98.0%)in the control group and all 50 eyes(100.0%)in the experimental group achieved an uncorrected distance visual acuity(UDVA)of ≥ 20/20.No eye in either group experienced a loss of more than one line in corrected distance visual acuity(CDVA)compared with the preoperative level.At 3 months postoperatively,63 eyes(90.0%)in the control group and 66 eyes(94.3%)in the experimental group had a spherical equivalent(SE)within-0.50 to 0.50 D.The postoperative cylinder was significantly lower in the experimental group than in the control group(P<0.05).Vector analysis revealed that the ex-perimental group had smaller values for the difference vector,index of success,and absolute angle of error than the control group,with all differences being statistically significant(all P<0.05).At 3 months postoperatively,43 eyes(61.4%)in the control group and 57 eyes(81.4%)in the experimental group had an angle of error within-5° to 5°.Conclusion The use of the VISULYZE software generated nomogram can optimize SMILE surgery design,offering good efficacy,safety,and predictability,and improving the precision of SMILE surgery for correcting myopia and astigmatism.
2.Antimicrobial resistance surveillance in the bacterial strains isolated from pediatric intensive care units in China:results from 2020 to 2022
Jing LIU ; Huiyuan YAN ; Gangfeng YAN ; Guoping LU ; Pan FU ; Chuanqing WANG ; Danqun JIN ; Wenjia TONG ; Chenyu ZHANG ; Jianli CHEN ; Yi LIN ; Jia LEI ; Yibing CHENG ; Qunqun ZHANG ; Kaijie GAO ; Yuanyuan CHEN ; Shufang XIAO ; Juan HE ; Li JIANG ; Huimin XU ; Yuxia LI ; Hanghai DING ; Hehe CHEN ; Yao ZHENG ; Qunying CHEN ; Ying WANG ; Hong REN ; Chenmei ZHANG ; Zhenjie CHEN ; Mingming ZHOU ; Yucai ZHANG ; Yiping ZHOU ; Zhenjiang BAI ; Saihu HUANG ; Lili HUANG ; Weiguo YANG ; Weike MA ; Qing MENG ; Pengwei ZHU ; Yong LI ; Yan XU ; Yi WANG ; Yanqiang DU ; Huijun CAI ; Bizhen ZHU ; Huixuan SHI ; Shaoxian HONG ; Yukun HUANG ; Meilian HUANG
Chinese Journal of Infection and Chemotherapy 2025;25(3):303-311
Objective This study aimed to investigate the antimicrobial resistance profiles of bacterial strains isolated from pediatric intensive care units(PICU)in China for better antimicrobial therapy.Methods Clinical isolates were collected from 17 institutions,including tertiary care children's hospitals and pediatric department of tertiary general hospitals in China from January 1,2020 to December 31,2022.Antimicrobial susceptibility testing was carried out according to a unified protocol using Kirby-Bauer method or automated systems.Results were interpreted according to the breakpoints released by the Clinical and Laboratory Standards Institute(CLSI)in 2020.Results A total of 10 688 isolates were collected,including gram-positive organisms(39.2%)and gram-negative organisms(60.8%).The top three organisms were S.aureus(13.6%,1 453/10 688),A.baumannii(10.0%,1 067/10 688),and coagulase-negative Staphylococcus(9.9%,1 058/10 688).Multi-drug resistant organisms(MDROs)were very common in children.The prevalence of methicillin-resistant Staphylococcus aureus(MRSA),carbapenem-resistant Enterobacterales(CRE),carbapenem-resistant E.coli,carbapenem-resistant K.pneumoniae(CRKP),carbapenem-resistant A.baumannii(CRAB),and carbapenem-resistant P.aeruginosa(CRPA)was 41.1%,19.4%,8.8%,30.9%,67.4%,and 28.8%,respectively.Overall,more than 50%of Enterobacteriales isolates were resistant to cephalosporins,while nearly 25%of Enterobacteriales isolates were resistant to carbapenems.MDROs were highly resistant to commonly used antibiotics.More than 80%of CRE and CRAB strains were resistant to all beta-lactam antibiotics.CRE and CRAB showed low resistance rates to tigecycline and polymyxin.CRPA showed lower resistance rates to piperacillin,beta-lactamase inhibitor combinations than the resistance rates to third and fourth generation cephalosporins.All of the Staphylococcus and Enterococcus isolates were susceptible to vancomycin and tigecycline.None of PRSP strains isolated from meningitis and nonmeningitis samples were resistant to rifampicin,vancomycin,or linezolid.The prevalence of β-lactamase-negative ampicillin-resistant(BLNAR)strains was 43.3%in Haemophilus influenzae.Conclusions MDROs were prevalent in PICU.It is necessary to establish an effective multidisciplinary team(MDT)to control the antimicrobial resistance.
3.The short-term effect of using VISULYZE generated nomogram to assist SMILE for myopia and astigmatism correction
Yan ZHAO ; Wenjia CAO ; Di SHEN ; Jun CAI ; Xiaohuan MA ; Wei WEI
Recent Advances in Ophthalmology 2025;45(10):805-809
Objective To evaluate the short-term efficacy of the VISULYZE software generated nomogram in assis-ting small incision lenticule extraction(SMILE)for the correction of myopia and astigmatism.Methods Non-randomized controlled trial.Patients who underwent SMILE surgery with the original nomogram,assisted by the same surgeon at the Laser Myopia Treatment Center of Xi'an NO.1 Hospital between February 2023 and January 2024,were included.A total of 52 patients(102 eyes)of myopic astigmatism with 3-month postoperative follow-up were collected.VISULYZE software was then used to generate a new nomogram.Subsequently,a total of 40 patients(70 eyes)with myopic with-the-rule astigmatism and a preoperative cylinder of ≤2.00 D,who underwent SMILE assisted by the new nomogram at the same center between August and November 2024,were enrolled.Among them,50 eyes had a target refraction of plano and were assigned to the experimental group.In addition,from the database of patients who underwent SMILE assisted by the origi-nal nomogram,42 patients(70 eyes)with myopic with-the-rule astigmatism and a cylinder of ≤2.00 D were screened,of which 51 eyes had a target refraction of plano,and these were assigned to the control group.The postoperative visual and refractive outcomes of both groups were compared at 3 months.Astigmatism results were analyzed using Alpins vector analysis.Results At 3 months postoperatively,among eyes with a target refraction of plano,50 eyes(98.0%)in the control group and all 50 eyes(100.0%)in the experimental group achieved an uncorrected distance visual acuity(UDVA)of ≥ 20/20.No eye in either group experienced a loss of more than one line in corrected distance visual acuity(CDVA)compared with the preoperative level.At 3 months postoperatively,63 eyes(90.0%)in the control group and 66 eyes(94.3%)in the experimental group had a spherical equivalent(SE)within-0.50 to 0.50 D.The postoperative cylinder was significantly lower in the experimental group than in the control group(P<0.05).Vector analysis revealed that the ex-perimental group had smaller values for the difference vector,index of success,and absolute angle of error than the control group,with all differences being statistically significant(all P<0.05).At 3 months postoperatively,43 eyes(61.4%)in the control group and 57 eyes(81.4%)in the experimental group had an angle of error within-5° to 5°.Conclusion The use of the VISULYZE software generated nomogram can optimize SMILE surgery design,offering good efficacy,safety,and predictability,and improving the precision of SMILE surgery for correcting myopia and astigmatism.
4.Based on Network Pharmacology to Explore the Mechanism of Compound Danshen Dripping Pills in Treating Psycho-cardiological Disease
Weihua LEI ; Jinyong CAI ; Mengying ZHANG ; Qian ZHAO ; Wenjia WANG ; Shuiping ZHOU ; Yunhui HU ; Ruiming LI
World Science and Technology-Modernization of Traditional Chinese Medicine 2025;27(4):1188-1200
Objective Based on Network pharmacology to explore the mechanism of Compound Danshen Dripping Pills in treating Psycho-cardiological disease.Methods To obtain the validated targets of the complete formulation of Compound Danshen Dripping Pills,data were sourced from databases including China National Knowledge Infrastructure,Wanfang,VIP,and PubMed.Additionally,genes associated with Psycho-cardiological disease were retrieved from the Genecards database.Utilizing the Digital Intelligence Traditional Chinese Medicine Innovation Platform,network proximity was calculated for the obtained targets and genes.The potential targets of Compound Danshen Dripping Pills in the treatment of Psycho-cardiological disease conduct enrichment analysis,trace the source of medicinal materials and effective components absorbed into the blood.Results Obtained 192 targets for the Compound Danshen Dripping Pills,1137 genes for Psycho-cardiological disease,and the network proximity calculation showed a significant correlation between the two(Z-score=-6.5282).The enrichment analysis of the 95 potential targets predominantly reveals their association with several key pathways,including AGE-RAGE signaling in diabetic complications,Lipid and atherosclerosis,fluid shear stress and atherosclerosis,the HIF-1 signaling pathway,TNF signaling.The traceability analysis indicates that 80 targets are associated with three distinct medicinal materials,10 targets are linked to two medicinal materials,and 5 targets are connected to a single medicinal material.95 targets are mainly related to 17 effective blood components such as salvianolic acid B,tanshinone ⅡA,and salvianolic acid A.The top 16 key genes were obtained by sorting the targets based on the Betweenness values corresponding to the blood components.The enrichment analysis of the key gene indicated that the treatment of Psycho-cardiological disease with Compound Danshen Dripping Pills is associated with the positive regulation of smooth muscle cell proliferation and the hypoxia response.Additionally,it is linked to the AGE-RAGE signaling pathway in diabetic complications,fluid shear stress and atherosclerosis,the relaxin signaling pathway,lipid and atherosclerosis,and the TNF signaling pathway,etc.Conclusion The Compound Danshen Dripping Pills may improve Psycho-cardiological disease by regulating inflammatory response,oxidative stress,myocardial ischemia,neuroprotection,and neurotoxicity inhibition through components such as salvianolic acid B,tanshinone ⅡA,tanshinone Ⅰ,salvianolic acid A,protocatechuic acid,etc.
5.Comparison of glucose fluctuation between metformin combined with acarbose or sitagliptin in Chinese patients with type 2 diabetes: A multicenter, randomized, active-controlled, open-label, parallel design clinical trial.
Xiaoling CAI ; Suiyuan HU ; Chu LIN ; Jing WU ; Junfen WANG ; Zhufeng WANG ; Xiaomei ZHANG ; Xirui WANG ; Fengmei XU ; Ling CHEN ; Wenjia YANG ; Lin NIE ; Linong JI
Chinese Medical Journal 2025;138(9):1116-1125
BACKGROUND:
Alpha-glucosidase inhibitors or dipeptidyl peptidase-4 inhibitors are both hypoglycemia agents that specifically impact on postprandial hyperglycemia. We compared the effects of acarbose and sitagliptin add on to metformin on time in range (TIR) and glycemic variability (GV) in Chinese patients with type 2 diabetes mellitus through continuous glucose monitoring (CGM).
METHODS:
This study was a randomized, open-label, active-con-trolled, parallel-group trial conducted at 15 centers in China from January 2020 to August 2022. We recruited patients with type 2 diabetes aged 18-65 years with body mass index (BMI) within 19-40 kg/m 2 and hemoglobin A1c (HbA1c) between 6.5% and 9.0%. Eligible patients were randomized to receive either metformin combined with acarbose 100 mg three times daily or metformin combined with sitagliptin 100 mg once daily for 28 days. After the first 14-day treatment period, patients wore CGM and entered another 14-day treatment period. The primary outcome was the level of TIR after treatment between groups. We also performed time series decomposition, dimensionality reduction, and clustering using the CGM data.
RESULTS:
A total of 701 participants received either acarbose or sitagliptin treatment in combination with metformin. There was no statistically significant difference in TIR between the two groups. Time below range (TBR) and coefficient of variation (CV) levels in acarbose users were significantly lower than those in sitagliptin users. Median (25th percentile, 75th percentile) of TBR below target level <3.9 mmol/L (TBR 3.9 ): Acarbose: 0.45% (0, 2.13%) vs . Sitagliptin: 0.78% (0, 3.12%), P = 0.042; Median (25th percentile, 75th percentile) of TBR below target level <3.0 mmol/L (TBR 3.0 ): Acarbose: 0 (0, 0.22%) vs . Sitagliptin: 0 (0, 0.63%), P = 0.033; CV: Acarbose: 22.44 ± 5.08% vs . Sitagliptin: 23.96 ± 5.19%, P <0.001. By using time series analysis and clustering, we distinguished three groups of patients with representative metabolism characteristics, especially in GV (group with small wave, moderate wave and big wave). No significant difference was found in the complexity of glucose time series index (CGI) between acarbose users and sitagliptin users. By using time series analysis and clustering, we distinguished three groups of patients with representative metabolism characteristics, especially in GV.
CONCLUSIONS:
Acarbose had slight advantages over sitagliptin in improving GV and reducing the risk of hypoglycemia. Time series analysis of CGM data may predict GV and the risk of hypoglycemia.
TRIAL REGISTRATION
Chinese Clinical Trial Registry: ChiCTR2000039424.
Humans
;
Metformin/therapeutic use*
;
Sitagliptin Phosphate/therapeutic use*
;
Acarbose/therapeutic use*
;
Diabetes Mellitus, Type 2/blood*
;
Middle Aged
;
Male
;
Female
;
Adult
;
Blood Glucose/drug effects*
;
Hypoglycemic Agents/therapeutic use*
;
Aged
;
Glycated Hemoglobin/metabolism*
;
Adolescent
;
Young Adult
;
China
;
East Asian People
6.Impact of digital fitting of orthokeratology on decentration and corneal aberration
Jun CAI ; Wenjia CAO ; Haoxi CHEN ; Jiaqian ZHANG ; Juanjuan WU ; Di SHEN ; Wei WEI
International Eye Science 2025;25(11):1893-1898
AIM: To investigate the decentration of the treatment zone(TZ)and the early impact on corneal higher-order aberrations(HOAs)induced by orthokeratology(OK)lenses fitted with digital corneal topography.METHODS: A retrospective longitudinal clinical study was conducted on 28 patients(28 right eyes)who were digitally fitted with OK lenses at the Laser Vision Center of Xi'an No.1 Hospital since 2023. Longitudinal measurements were taken at baseline, 1 wk, 1 and 3 mo post-treatment to assess changes in TZ diameter, decentration magnitude and direction. Furthermore, changes in corneal HOAs were observed, and correlations of decentration with each HOAs were also analyzed.RESULTS: The mean age of patients was 10.29±2.00 years, with 15 males and 13 females, and the average baseline spherical equivalent was -2.92±0.94 D. The average TZ diameters at 1 wk, 1, and 3 mo were 3.64±0.58, 3.83±0.57, and 3.69±0.55 mm, respectively, with no statistically significant differences between 1 wk and 3 mo. Horizontal decentration values were -0.43±0.28, -0.38±0.33, and -0.31±0.37 mm after wearing lenses for 1 wk, 1 and 3 mo, respectively, while vertical decentration values were -0.33±0.20, -0.33±0.23, and -0.36±0.23 mm across the same time points. The TZ consistently decentered inferotemporally, and changes in both horizontal and vertical decentration over time were not statistically significant(Fhorizontal=1.416, Phorizontal=0.252; Fvertical=0.126, Pvertical=0.882). Significant increases in total corneal HOAs, coma, and spherical aberration were observed at 5 mm optical zone post-wear(F=45.695, 33.401, and 45.091, all P<0.001). Vertical decentration at 1 wk and 1 mo was negatively correlated with total HOAs and coma(all P<0.05), while horizontal decentration at 3 mo showed a weak negative correlation with spherical aberration(P=0.037).CONCLUSION: Digitally-fitted OK lenses achieved stable TZ diameter by 1 wk post-wear, with minor inferotemporal decentration. Early post-wear corneal total HOAs, coma and sphercal aberration increased significantly, and vertical downward decentration was associated with elevated total HOAs and coma. However, correlations between decentration and HOAs weakened by 3 mo.
7.Based on Network Pharmacology to Explore the Mechanism of Compound Danshen Dripping Pills in Treating Psycho-cardiological Disease
Weihua LEI ; Jinyong CAI ; Mengying ZHANG ; Qian ZHAO ; Wenjia WANG ; Shuiping ZHOU ; Yunhui HU ; Ruiming LI
World Science and Technology-Modernization of Traditional Chinese Medicine 2025;27(4):1188-1200
Objective Based on Network pharmacology to explore the mechanism of Compound Danshen Dripping Pills in treating Psycho-cardiological disease.Methods To obtain the validated targets of the complete formulation of Compound Danshen Dripping Pills,data were sourced from databases including China National Knowledge Infrastructure,Wanfang,VIP,and PubMed.Additionally,genes associated with Psycho-cardiological disease were retrieved from the Genecards database.Utilizing the Digital Intelligence Traditional Chinese Medicine Innovation Platform,network proximity was calculated for the obtained targets and genes.The potential targets of Compound Danshen Dripping Pills in the treatment of Psycho-cardiological disease conduct enrichment analysis,trace the source of medicinal materials and effective components absorbed into the blood.Results Obtained 192 targets for the Compound Danshen Dripping Pills,1137 genes for Psycho-cardiological disease,and the network proximity calculation showed a significant correlation between the two(Z-score=-6.5282).The enrichment analysis of the 95 potential targets predominantly reveals their association with several key pathways,including AGE-RAGE signaling in diabetic complications,Lipid and atherosclerosis,fluid shear stress and atherosclerosis,the HIF-1 signaling pathway,TNF signaling.The traceability analysis indicates that 80 targets are associated with three distinct medicinal materials,10 targets are linked to two medicinal materials,and 5 targets are connected to a single medicinal material.95 targets are mainly related to 17 effective blood components such as salvianolic acid B,tanshinone ⅡA,and salvianolic acid A.The top 16 key genes were obtained by sorting the targets based on the Betweenness values corresponding to the blood components.The enrichment analysis of the key gene indicated that the treatment of Psycho-cardiological disease with Compound Danshen Dripping Pills is associated with the positive regulation of smooth muscle cell proliferation and the hypoxia response.Additionally,it is linked to the AGE-RAGE signaling pathway in diabetic complications,fluid shear stress and atherosclerosis,the relaxin signaling pathway,lipid and atherosclerosis,and the TNF signaling pathway,etc.Conclusion The Compound Danshen Dripping Pills may improve Psycho-cardiological disease by regulating inflammatory response,oxidative stress,myocardial ischemia,neuroprotection,and neurotoxicity inhibition through components such as salvianolic acid B,tanshinone ⅡA,tanshinone Ⅰ,salvianolic acid A,protocatechuic acid,etc.
8.Antimicrobial resistance surveillance in the bacterial strains isolated from pediatric intensive care units in China:results from 2020 to 2022
Jing LIU ; Huiyuan YAN ; Gangfeng YAN ; Guoping LU ; Pan FU ; Chuanqing WANG ; Danqun JIN ; Wenjia TONG ; Chenyu ZHANG ; Jianli CHEN ; Yi LIN ; Jia LEI ; Yibing CHENG ; Qunqun ZHANG ; Kaijie GAO ; Yuanyuan CHEN ; Shufang XIAO ; Juan HE ; Li JIANG ; Huimin XU ; Yuxia LI ; Hanghai DING ; Hehe CHEN ; Yao ZHENG ; Qunying CHEN ; Ying WANG ; Hong REN ; Chenmei ZHANG ; Zhenjie CHEN ; Mingming ZHOU ; Yucai ZHANG ; Yiping ZHOU ; Zhenjiang BAI ; Saihu HUANG ; Lili HUANG ; Weiguo YANG ; Weike MA ; Qing MENG ; Pengwei ZHU ; Yong LI ; Yan XU ; Yi WANG ; Yanqiang DU ; Huijun CAI ; Bizhen ZHU ; Huixuan SHI ; Shaoxian HONG ; Yukun HUANG ; Meilian HUANG
Chinese Journal of Infection and Chemotherapy 2025;25(3):303-311
Objective This study aimed to investigate the antimicrobial resistance profiles of bacterial strains isolated from pediatric intensive care units(PICU)in China for better antimicrobial therapy.Methods Clinical isolates were collected from 17 institutions,including tertiary care children's hospitals and pediatric department of tertiary general hospitals in China from January 1,2020 to December 31,2022.Antimicrobial susceptibility testing was carried out according to a unified protocol using Kirby-Bauer method or automated systems.Results were interpreted according to the breakpoints released by the Clinical and Laboratory Standards Institute(CLSI)in 2020.Results A total of 10 688 isolates were collected,including gram-positive organisms(39.2%)and gram-negative organisms(60.8%).The top three organisms were S.aureus(13.6%,1 453/10 688),A.baumannii(10.0%,1 067/10 688),and coagulase-negative Staphylococcus(9.9%,1 058/10 688).Multi-drug resistant organisms(MDROs)were very common in children.The prevalence of methicillin-resistant Staphylococcus aureus(MRSA),carbapenem-resistant Enterobacterales(CRE),carbapenem-resistant E.coli,carbapenem-resistant K.pneumoniae(CRKP),carbapenem-resistant A.baumannii(CRAB),and carbapenem-resistant P.aeruginosa(CRPA)was 41.1%,19.4%,8.8%,30.9%,67.4%,and 28.8%,respectively.Overall,more than 50%of Enterobacteriales isolates were resistant to cephalosporins,while nearly 25%of Enterobacteriales isolates were resistant to carbapenems.MDROs were highly resistant to commonly used antibiotics.More than 80%of CRE and CRAB strains were resistant to all beta-lactam antibiotics.CRE and CRAB showed low resistance rates to tigecycline and polymyxin.CRPA showed lower resistance rates to piperacillin,beta-lactamase inhibitor combinations than the resistance rates to third and fourth generation cephalosporins.All of the Staphylococcus and Enterococcus isolates were susceptible to vancomycin and tigecycline.None of PRSP strains isolated from meningitis and nonmeningitis samples were resistant to rifampicin,vancomycin,or linezolid.The prevalence of β-lactamase-negative ampicillin-resistant(BLNAR)strains was 43.3%in Haemophilus influenzae.Conclusions MDROs were prevalent in PICU.It is necessary to establish an effective multidisciplinary team(MDT)to control the antimicrobial resistance.
9.Progress of peripheral defocus design framework eyeglasses in myopia control
Haoxi CHEN ; Di SHEN ; Jun CAI ; Xiyu SUN ; Wenjia CAO ; Mengchen LI ; Wei WEI
International Eye Science 2024;24(8):1275-1279
Myopia is becoming more and more common all over the world, and the incidence of myopia is gradually increasing. Many treatments have been used to prevent and control myopia, including optics, drugs, environment or behavior, but the results are different and lack standardization. At present, many experiments have proved that peripheral defocus technology has a certain effect on myopia control. Based on this technology, three kinds of framed eyeglass lenses with peripheral defocus design, namely defocus incorporated multiple segments(DIMS), highly aspherical lenslets(HAL)and cylindrical annular reactive elements(CARE), are commonly used in medical and optometry institutions in China. These lenses provide not only clear vision in the central area, but also a certain amount of myopic defocus in the periphery to control the progression of myopia. This paper aims to focus on the design principle and myopia prevention and control effect of the above three peripheral defocus lenses, and evaluate their effectiveness in clinical practice.
10.Clinical effect of cross positioning method for correcting low and moderate astigmatism during small incision lenticule extraction
Wenjia CAO ; Di SHEN ; Jun CAI ; Wei WEI
International Eye Science 2024;24(2):301-306
AIM: To evaluate the clinical outcomes of using the cross-positioning method for correcting low and moderate astigmatism during small incision lenticule extraction(SMILE)surgery with Alpins vector analysis.METHODS: A total of 50 patients(81 eyes)with low and moderate astigmatism with the rule ≤1.50 D who underwent SMILE surgery at the laser myopia treatment center of Xi'an No.1 Hospital from May 2022 to November 2022 were included in the prospective randomized controlled study, and they were divided into two groups according to the random table, with 25 case(41 eyes)in cross-positioning group and 25 cases(40 eyes)in control group. In the cross-positioning group, the patients' head position was adjusted based on the cross intersection lines before the standard SMILE procedure, aligning the lateral canthi with the horizontal line and the midpoint of the eyebrows and the nose bridge with the vertical line. Postoperative visual acuity and refractive results at 3 mo were observed in both groups, and astigmatic changes were analyzed and evaluated using the Alpins vector analysis method.RESULTS: During the follow-up period, 6 cases(11 eyes)in the cross-positioning group were lost to follow-up, while in the control group, 8 cases(14 eyes)were lost to follow-up, with 19 cases(30 eyes)and 17 cases(26 eyes)finally included in the cross-positioning group and the control group, respectively. At 3 mo postoperatively, the uncorrected visual acuity(UCVA)of both groups' operated eyes was ≥1.0, and no serious complications occurred, with no significant differences in UCVA, best corrected visual acuity(BCVA), spherical power, and spherical equivalent between the cross-positioning group and the control group(all P>0.05). The cylindrical power in the cross-positioning group was 0.00(0.00, 0.00)D, which was lower than -0.13(-0.50, 0.00)D in the control group(P=0.01). The vector analysis results showed that the difference vector(DV)in the cross-positioning group was lower than that in the control group [0.00(0.00, 0.00)vs 0.13(0.00, 0.50), P=0.01], and the index of success(IOS)was better than that of the control group [0.00(0.00, 0.00)vs 0.18(0.00, 0.77), P<0.01]. At 3 mo postoperatively, 26(87%)and 15(58%)eyes in the cross-positioning group and control groups achieved an angle of error(AE)within ±5°, respectively.CONCLUSION: The cross positioning method was used to calibrate the patients' head position during SMILE surgery, which reduced the axial position error and improved the accuracy of SMILE in correcting low and moderate astigmatism.

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