近视患者准分子激光原位角膜磨镶术后动、静态对比敏感度的变化

目的观察近视患者准分子激光原位角膜磨镶术(laserinsitukeratomileusis,LASIK)后动、静态对比敏感度的变化。方法对2002年2月～2002年6月在我院接受LASIK手术的37例近视和近视散光患者(共73眼)进行了术前,术后1、3、6个月的视力,裂隙灯,散瞳眼底,散瞳检影验光,角膜地形图,动、静态对比敏感度0.7、1.4、2.7、5.5、11、22频率段的观察。结果LASIK术后1个月动态对比敏感度和静态对比敏感度较术前普遍下降,静态对比敏感度在2.7、5.5、11(P<0.01)和22cpd(P<0.05)有显著性下降,11cpd最敏感;而动态对比敏感度则在5.5(P<0.01)、11cps(P<0.05)下降有统计学意义,11cps最敏感;≥6.25D近视组和≥2DC散光组下降更明显。术后3个月,动、静态对比敏感度各频率段逐渐恢复并超过术前水平,术后6个月继续提高。静态对比敏感度所有频率段均超过术前水平(P<0.01),而动态对比敏感度在2.7、5.5、11cps(P<0.01)超过术前水平,≤6.0D近视组和<2.0DC散光组提高更明显。频率越高,提高率越大,以22cpd和22cps最明显。而≥2DC的散光组,动态对比敏感度在术后6个月无显著提高,且1.4cps段还低于术前水平(P<0.05)。结论LASIK术后病例确实有暂时的对比敏感度下降,但是在术后3个月可恢复并超过术前水平,术后6个月有进一步提高。     

准分子激光角膜屈光手术矫治RK术后近视散光

目的:探讨准分子激光原位角膜磨镶术(LASIK)和准分子激光屈光性角膜切削术(PRK)矫治角膜放射状切开术(RK)后残余近视散光的安全性和有效性.方法:对接受RK手术4～15年,近视散光稳定2年以上的患者19例(38眼)分别行PRK和LASIK手术,其中PRK组8例(16眼),术前屈光度为:球镜-1.00～-5.25D,平均-3.12±0.87D,柱镜0～-2.25D,平均-1.27±0.36D,LASIK组11例(22眼),术前屈光度:球镜-1.50～-9.50D,平均-3.54±2.79D,柱镜0～-3.0D,平均-1.58±0.69D,术后随访12个月.结果:两组患者术后3个月时视力和屈光状态趋于稳定,术后6个月屈光度均在±0.75D以内,术后1年裸眼视力33眼(86.84)≥1.0,38眼(100%)≥0.8,未有最佳矫正视力下降.结论:LASIK和PRK矫治RK术后近视散光均安全、有效,PRK安全简便,LASIK稳定性和预测性更好.     

准分子激光治疗近视散光的疗效观察

目的 :评价准分子激光角膜切削术 (PRK)及准分子激光原位角膜磨镶术 (LASIK)对近视散光的治疗效果。方法 :采用美国SCAN - 195型准分子激光系统对 74例 (138只眼 )近视散光的患者进行治疗 ,PRK组近视度数在 - 1 0 0～ - 5 0 0D ,散光度数在 - 0 5 0～ - 3 0 0D之间的患者 ,共 6 1只眼 ;LASIK组为近视度数大于 - 5 0 0D伴散光者或散光度数大于 - 3 0 0D的患者 ,共 77只眼。结果 :术后视力 :所有病例均随访 1a以上 ,PRK组视力均≥ 0 5 ,其中 91 98%的患者≥ 0 8;LASIK组视力均≥0 5 ,其中 90 12 %的患者≥ 0 8。结论 :PRK和LASIK治疗近视散光是安全、有效并且可行     

硬性透氧性隐形眼镜矫正LASEK或LASIK术后不规则散光的临床观察

目的 观察RGP在矫正LASEK或LASIK术后不规则散光方面的临床效果。方法 48例（52眼）LASIK术后4个月和LASEK术后6个月有3．0-6．0D的近视残留或回退同时伴有1．0D以上不规则散光，经综合验光无法达到术前最佳矫正视力的患者，验配RGP后，分别于1周，1个月，3个月，6个月测量其矫正视力和配适情况及角膜结膜有无损伤和病变。结果 52眼配带RGP视力均达到术前最佳矫正视力，其中37眼较术后综合验光结果视力提高3行，15眼提高2行。结论 配带RGP能有效矫正LAS1K或LASEK手术后的不规则散光问题，提高矫正视力，优化视觉质量。     

准分子激光原位角膜磨削术治疗复性近视散光效果分析

目的 :探讨准分子激光原位角膜磨削术 (LASIK)治疗复性近视散光的有效性和预测性。方法 :采用LASIK对6 0例 (110只眼 )复性近视散光进行治疗。根据散光度大小分为二组 :A组 (- 2 2 5～ - 3 0 0 )D ;B组 (- 3 2 5～ -6 0 0D)。观察手术前后的视力和屈光度。结果 :A组术后平均散光度从术前 (- 2 5 1± 0 6 8)D下降为 (- 0 5 1± 0 2 5 )D。B组术后的平均散光度从术前 (- 3 85± 0 4 6 )D下降为 (- 0 5 2± 0 2 2 )D。术后 12个月时两组残留散光度无明显差别。两组术后的平均裸眼视力均好于术前矫正视力。结论 :LASIK治疗高度近视伴中高度散光 ,效果明显。     

波前像差引导的飞秒LASIK治疗近视的临床研究

目的探讨波前像差引导的飞秒激光原位角膜磨镶术(LASIK)治疗近视的临床效果。方法选取2019年6月至2020年5月于本院接受治疗的60例近视患者作为研究对象,根据随机数字表法分为两组,每组30例(60眼)。对照组采用单纯飞秒激光手术治疗,观察组采用波前像差引导的飞秒LASIK治疗。比较两组裸眼视力、视空间对比敏感度、高阶像差总RMS值、散光度数、裂隙灯显微镜检查结果和角膜地形图检查结果。结果术后1、3个月,观察组裸眼视力均高于对照组,3 c/d和12 c/d条件下对比敏感度均低于对照组,差异有统计学意义(P<0.05);术后3个月,观察组高阶像差总RMS值低于对照组,散光度数低于对照组,差异有统计学意义(P<0.05);术后1个月,两组角膜纹出现率和平滑型角膜例数比较差异均无统计学意义,术后3个月,两组角膜纹均基本消失,角膜逐渐向平滑过渡。结论波前像差引导的飞秒LASIK治疗近视术后恢复效果优于常规飞秒LASIK,术后残留散光值低,视力恢复快,对比敏感度低,值得临床推广应用。     

波前引导飞秒激光制瓣LASIK治疗LASIK术后近视的临床疗效

目的观察波前引导飞秒激光制瓣LASIK治疗LASIK术后近视的临床疗效。方法选择LASIK术后再次出现近视的患者50例(50眼)。用飞秒激光制瓣,在波前引导下行准分子激光切削。术后6个月时的裸眼视力、屈光度、最佳矫正视力、对比敏感度(CSF)、波前像差与术前相比较。结果术后6个月的裸眼视力较术前显著提高(P0.01)。术后6个月的屈光度较术前显著改善(P0.01)。术后6个月的最佳矫正视力较术前差异无统计学意义(P0.05)。术后6个月CSF在6.0c·d~(-1)和18.0c·d~(-1)空间频率上比术前显著改善(均为P0.05)。术后6个月眩光CSF在18.0c·d~(-1)空间频率上比术前显著改善(P0.05)。术后6个月高阶像差比术前显著减少(P0.01)。结论波前引导飞秒激光制瓣LASIK治疗LASIK术后近视疗效确切,可有效降低高阶像差,提高术后视觉质量。     

三维频域光学相干断层扫描、彩色中心视野对诊治脉络膜新生血管疾病的意义

目的分析三维频域光学相干断层扫描(3D-OCT)在脉络膜新生血管疾病(CNV)治疗中的形态学图像及彩色中心视野对黄斑功能检测的临床意义。方法前瞻性分析51例62眼确诊为CNV且行光动力疗法(PDT)治疗的患者3D-OCT图像及10°、30°彩色中心视野,比较治疗前后患者黄斑中心凹厚度、视野平均敏感度(mean sen-sitivity,MS)平均值及视力的改变。结果 CNV患者PDT治疗后3、6个月黄斑中心凹厚度与治疗前比较差异有统计学意义(P<0.05)。治疗后1、3、6个月10°及30°视野的MS较治疗前均明显提高,差异有统计学意义(P<0.05)。治疗后6个月有54.8%的患眼视力提高超过2行。结论 3D-OCT可诊断CNV,并进行PDT治疗前后视网膜形态结构的观察;彩色中心视野能定量评估CNV患者PDT治疗后黄斑功能的恢复。     

准分子激光原位角膜磨镶术治疗近视散光的疗效分析

目的 探讨准分子激光原位角膜磨镶术(LASIK)治疗近视散光的临床疗效. 方法 按照术前散光度数分为3组,A组(无散光0～-0.5 DC)235眼、B组(散光-0.75～-2.00 DC)217眼、C组(散光＞-2.00 DC)61眼,三组近视散光轴位均在(180±30)°,术前等量球镜差异无统计学意义(P＞0.05),范围-0.25～-14 D并用LASIK对其近视及散光治疗,随访半年以上,观察手术前后的视力、屈光度、散光及其散光轴位的变化. 结果 三组术后裸眼视力均较术前明显提高,术后6个月与术前最佳矫正视力一致,差异无统计学意义(P＞0.05),B、C两组术后残留屈光度低于A组,差异有统计学意义(P＜0.05),B、C两组术后残留散光度较术前明显降低,C组残留散光度大于B组(P＜0.05),B、C两组矫正散光的轴向差小于10°. 结论 LASIK治疗近视散光疗效确切,轴向准确,但散光度越高,术后欠矫增大趋势.     

准分子激光原位角膜磨镶术治疗复性近视散光的疗效观察

目的探讨准分子激光原位角膜磨镶术(LASIK)治疗复性近视散光的有效性和预测性。方法采用LASIK手术对50例(90只眼)复性近视散光进行治疗。根据散光度大小分为二组:A组-2.25~-3.00 D,B组-3.25~-6.00 D。观察手术前后的视力和屈光度。结果A组术后平均散光度从术前(-2.51±0.68)D下降为(-0.51±0.22)D,B组术后的平均散光度从术前(-3.85±0.46)D下降为(-0.53±0.29)D,术后12个月时两组残留散光度差异无统计学意义(P>0.05)。两组术后的平均裸眼视力均好于术前矫正视力。结论LASIK手术治疗治疗复性近视散光,效果明显。     

Value of D-Dimers in patients with acute aortic dissection

Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P ＜ 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (＞0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P ＜0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P ＜ 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.     

Research of combined liver-kidney transplantation model in rats

Objective： To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods： SD rats served as both donors and recipients. 4℃ sodium lactate Ringer＇s was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava （IVC） inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results： Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion： This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.     

BLOOD PRESSURE CHANGE WITH AGE IN SALT-SENSITIVE TEENAGERS

Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P＜ 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P＜ 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.     

安心颗粒对急诊经皮冠状动脉介入术后生活质量影响的研究

目的：评价使用安心颗粒对急诊经皮冠状动脉介入术（PPCI）术后生活质量的影响.方法：将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组（术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次）和对照组（仅接受基础药物治疗）.所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表（MIDAS）、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果：入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异（P＞0.05）;出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低（P＜0.05）;组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低（P＜0.05）.两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血（P＞0.05）.两组发生轻度血小板减少症的患者数比较无差异（P＞0.05）.结论：PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.     

The comparative studies of the influences of Urapidil and Nicardipine on sino-atrial node function, atrio-ventricular node function and hemodynamics

Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P＜0.01);the MAP decreased(P＜0.01)and the HR increased drastically(P＜0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.     

Expression of OPGmRNA and ODFmRNA in the patients of hip fracture due to osteoporosis

Objective：To investigate the gene expression of osteoprotegerin（OPG） and osteoclast differentiation factor（ODF） in the bone tissue of patients with hip fracture due to osteoporosis. Methods：OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers（over 50 years old） with hip fracture（Observer Group） and 30 cases of hip facture sufferers with no osteoporosis（Control group） were analyzed with the Semi-Quantitative RT-PCR method. Results：The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion：Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.     

The clinicopathological and immuohistochemical analysis of solid-pseudopapillary tumor of the pancreas： report of 9 cases

Objective：To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas（SPTP）. Methods：Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin（HE） staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results：Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin（9/9 cases）, AAT（9/9 cases）, NSE（9/9 cases）, ACT（7/9 cases）, CK20（2/9 cases）, CgA（1/9 cases）, S-100（3/gcases）, PR（4/gcases）, Syn（3/9 cases） and CD56（5/9cases）, negative in CEA and ER. Conclusion：SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.     

Dynamic Changes in Serum Estradiol and Progesterone levels in Patients of Premenstrual Syndrome with Adverse Flow of Liver-qi

Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.     

Real-time Three-dimensional Echocardiography in Assessment of Left Ventricular and Right Ventricular Volumes

Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.     

SCREENING FOR A 21-CHROMOSOME ABNORMALITY IN PREIMPLANTED EMBRYOS OF ELDERLY WOMEN

Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.