目的分析我院的44例小主动脉瓣环(直径≤17mm)患者行St Jude Medica Regent瓣膜置换术后心功能等改变,探讨是否存在植入瓣膜与患者不匹配现象。方法2007年10月至2009年3月,我院有44例小主动脉瓣环(直径≦17mm)患者,置换17mm St Jude Med...目的分析我院的44例小主动脉瓣环(直径≤17mm)患者行St Jude Medica Regent瓣膜置换术后心功能等改变,探讨是否存在植入瓣膜与患者不匹配现象。方法2007年10月至2009年3月,我院有44例小主动脉瓣环(直径≦17mm)患者,置换17mm St Jude Medica Regent机械瓣膜组;随机选择同期44例直径为21mm患者,置换21mm St Jude机械瓣膜组。术后随访两组患者的临床症状、体征,心电图、超声心电图等指标,采用SPSS13.0统计软件进行比较分析。结果17mm St Jude Medica Regent机械瓣膜组中,心电图检查8例有ST段改变,术后3例仍存在胸闷症状,偶尔有胸痛不适3例;术后心功能Ⅱ级8例、Ⅲ级4例。21mm St Jude机械瓣膜组术后心电图检查6例有ST段改变,2例有胸闷症状,偶尔有胸痛不适2例;术后心功能Ⅱ级11例,Ⅲ级2例,两组间比较差异无统计学意义(P=0.32)。两组患者术后左心室舒张期末内径、左心室后壁厚度、左心室重量指数、主动脉跨瓣压差等均较术前明显改善(P<0.05),左心室射血分数(LVEF)术后6～12月与术前比较明显提高(P<0.05),但两组间比较差异无统计学意义((P>0.05)。结论对于体重较轻(≤60kg)、体表面积较小(≤1.6cm2)的小主动脉瓣环患者,置换17mm St Jude Medical Regent机械瓣后,能取得较好的效果,部分指标已经接近或达到置换外径21mm St Jude机械瓣膜组,无明显PPM现象,无须行主动脉瓣环扩大术。展开更多
目的探讨小主动脉瓣环（直径≤19mm）患者行St．Jude Medical Regent（SJM Regent）瓣膜置换术后的心功能改变，研究是否存在植入瓣膜与患者不匹配（Prosthesis-Patient Mismatch，PPM）现象．以及是否有行主动脉瓣瓣环扩大术的必要。方...目的探讨小主动脉瓣环（直径≤19mm）患者行St．Jude Medical Regent（SJM Regent）瓣膜置换术后的心功能改变，研究是否存在植入瓣膜与患者不匹配（Prosthesis-Patient Mismatch，PPM）现象．以及是否有行主动脉瓣瓣环扩大术的必要。方法2004年3月-2005年3月，22例主动脉瓣环直径≤19mm患者置换SJM Regent机械瓣，用彩色多普勒超声仪对左心功能进行术前、术后监测．并与22例置换St．Jude Medical Hemodynamic Plus Series（SJMHP）机械瓣及22例置换外径23mm常规机械瓣患者进行对比。结果置换SJM Regent机械瓣膜患者术后的左心功能指标较术前明显好转，左室射血分数、左室缩短分数、瓣膜有效开口面积／体表面积之比（EOA指数）明显上升，左室重量指数及主动脉跨瓣压差也有不同程度降低。左心功能各项指标改善明显好于置换SJMHP机械瓣患者．部分指标接近或好于置换外径23mm瓣膜者。结论对于小主动脉瓣环患者．置换Regent机械瓣后指标已经接近或达到置换外径23mm常规瓣膜者，无PPM现象，大部分患者无须行主动脉瓣瓣环扩大术。展开更多
A novel method for the determination of vitamin C（Vc） is proposed in this article. After the reaction with Folin-Ciocalteau reagent at ambient temperature, Vc solution was scanned at 750--1100 nm, and its first-orde...A novel method for the determination of vitamin C（Vc） is proposed in this article. After the reaction with Folin-Ciocalteau reagent at ambient temperature, Vc solution was scanned at 750--1100 nm, and its first-order derivative spectrum were obtained from the original spectrum. The values of derivative selected at 995 nm were used for determination. It was proved that Vc could quickly react with Folin-Ciocalteau reagent within 5 min and the product was quite stable for a long time. The conditions required for this method is not very complicated, its precision and accuracy are similar to those of the iodometric titration described in Chinese Pharmacopoeia, and the limit of detection is 0.312 μg/mL. The determination of the results of vitamin C tablet, pill, and injection demonstrates that this method has wide pharmaceutical applications.展开更多
文摘目的分析我院的44例小主动脉瓣环(直径≤17mm)患者行St Jude Medica Regent瓣膜置换术后心功能等改变,探讨是否存在植入瓣膜与患者不匹配现象。方法2007年10月至2009年3月,我院有44例小主动脉瓣环(直径≦17mm)患者,置换17mm St Jude Medica Regent机械瓣膜组;随机选择同期44例直径为21mm患者,置换21mm St Jude机械瓣膜组。术后随访两组患者的临床症状、体征,心电图、超声心电图等指标,采用SPSS13.0统计软件进行比较分析。结果17mm St Jude Medica Regent机械瓣膜组中,心电图检查8例有ST段改变,术后3例仍存在胸闷症状,偶尔有胸痛不适3例;术后心功能Ⅱ级8例、Ⅲ级4例。21mm St Jude机械瓣膜组术后心电图检查6例有ST段改变,2例有胸闷症状,偶尔有胸痛不适2例;术后心功能Ⅱ级11例,Ⅲ级2例,两组间比较差异无统计学意义(P=0.32)。两组患者术后左心室舒张期末内径、左心室后壁厚度、左心室重量指数、主动脉跨瓣压差等均较术前明显改善(P<0.05),左心室射血分数(LVEF)术后6～12月与术前比较明显提高(P<0.05),但两组间比较差异无统计学意义((P>0.05)。结论对于体重较轻(≤60kg)、体表面积较小(≤1.6cm2)的小主动脉瓣环患者,置换17mm St Jude Medical Regent机械瓣后,能取得较好的效果,部分指标已经接近或达到置换外径21mm St Jude机械瓣膜组,无明显PPM现象,无须行主动脉瓣环扩大术。
文摘目的探讨小主动脉瓣环（直径≤19mm）患者行St．Jude Medical Regent（SJM Regent）瓣膜置换术后的心功能改变，研究是否存在植入瓣膜与患者不匹配（Prosthesis-Patient Mismatch，PPM）现象．以及是否有行主动脉瓣瓣环扩大术的必要。方法2004年3月-2005年3月，22例主动脉瓣环直径≤19mm患者置换SJM Regent机械瓣，用彩色多普勒超声仪对左心功能进行术前、术后监测．并与22例置换St．Jude Medical Hemodynamic Plus Series（SJMHP）机械瓣及22例置换外径23mm常规机械瓣患者进行对比。结果置换SJM Regent机械瓣膜患者术后的左心功能指标较术前明显好转，左室射血分数、左室缩短分数、瓣膜有效开口面积／体表面积之比（EOA指数）明显上升，左室重量指数及主动脉跨瓣压差也有不同程度降低。左心功能各项指标改善明显好于置换SJMHP机械瓣患者．部分指标接近或好于置换外径23mm瓣膜者。结论对于小主动脉瓣环患者．置换Regent机械瓣后指标已经接近或达到置换外径23mm常规瓣膜者，无PPM现象，大部分患者无须行主动脉瓣瓣环扩大术。
基金Natural Science Foundation of Jilin Province, China(No.200305502)
文摘A novel method for the determination of vitamin C（Vc） is proposed in this article. After the reaction with Folin-Ciocalteau reagent at ambient temperature, Vc solution was scanned at 750--1100 nm, and its first-order derivative spectrum were obtained from the original spectrum. The values of derivative selected at 995 nm were used for determination. It was proved that Vc could quickly react with Folin-Ciocalteau reagent within 5 min and the product was quite stable for a long time. The conditions required for this method is not very complicated, its precision and accuracy are similar to those of the iodometric titration described in Chinese Pharmacopoeia, and the limit of detection is 0.312 μg/mL. The determination of the results of vitamin C tablet, pill, and injection demonstrates that this method has wide pharmaceutical applications.
