In the event of blood vessel damage, human platelets are promptly recruited on the site of injury and, after their adhesion, activation and aggregation, prevent blood loss with the formation of a clot. The consequence...In the event of blood vessel damage, human platelets are promptly recruited on the site of injury and, after their adhesion, activation and aggregation, prevent blood loss with the formation of a clot. The consequence of abnormal regulation can be either hemorrhage or the development of thrombosis. Qualitative and/or quantitative defects in platelets promote bleeding, whereas the residual reactivity of platelets, despite antiplatelet therapies, play an important role in promoting arterial thrombotic complications. Platelet function is traditionally assessed to investigate the origin of a bleeding syndrome, to predict the risk of bleeding prior surgery or during pregnancy or to monitor the efficacy of antiplatelet therapy in thrombotic syndromes that, now, can be considered a new discipline. "Old" platelet function laboratory tests such as the evaluation of bleeding time and the platelet aggregation analysis inplatelet-rich plasma are traditionally utilized to aid in the diagnosis and management of patients with platelet and hemostatic disorders and used as diagnostic tools both in bleeding and thrombotic diathesis in specialized laboratories. Now, new and renewed automated systems have been introduced to provide a simple, rapid assessment of platelet function including point of care methods. These new methodologies are also suitable for being used in non-specialized laboratories and in critical area for assessing platelet function in whole blood without the requirement of sample processing. Some of these methods are also beginning to be incorporated into routine clinical use and can be utilized as not only as first panel for the diagnosis of platelet dysfunction, but also for monitoring anti-platelet therapy and to potentially assess risk of both bleeding and/or thrombosis.展开更多
AIM:To investigate the diagnostic accuracy of the mean platelet volume and platelet distribution width in acute appendicitis.METHODS:This retrospective,case-controlled study compared 295 patients with acute appendicit...AIM:To investigate the diagnostic accuracy of the mean platelet volume and platelet distribution width in acute appendicitis.METHODS:This retrospective,case-controlled study compared 295 patients with acute appendicitis(Group?Ⅰ),100 patients with other intra-abdominal infections(GroupⅡ),and 100 healthy individuals(GroupⅢ)between January 2012 and January 2013.The age,gender,and white blood cell count,neutrophil percentage,mean platelet volume,and platelet distribution width values from blood samples were compared among the groups.Statistical analyses were performed using SPSS for Windows 21.0 software.In addition,the sensitivity,specificity,positive and negative predictive values and likelihood ratios,and diagnostic accuracy were calculated.RESULTS:The mean ages of patients were 29.9±12.0years for Group?Ⅰ,31.5±14.0 years for GroupⅡ,and30.4±13.0 years for GroupⅢ.Demographic features such as age and gender were not significantly different among the groups.White blood cell count,neutrophil percentage and platelet distribution width were significantly higher in Group?Ⅰ?compared to groupsⅡandⅢ(P<0.05).Diagnostically,the sensitivity,specificity and diagnostic accuracy were 73.1%,94.0%,and 78%for white blood cell count,70.0%,96.0%,and 76.0%for neutrophil percentage,29.5%,49.0%,and 34.0%for mean platelet volume,and 97.1%,93.0%,and 96.0%for platelet distribution width,respectively.The highest diagnostic accuracy detected was for platelet distribution width between Group?Ⅰ?and GroupⅢ(P<0.01).CONCLUSION:Platelet distribution width analysis can be used for diagnosis of acute appendicitis without requiring additional tests,thus reducing the cost and loss of time.展开更多
目的观察强直性脊柱炎(AS)患者血小板参数的变化及外周血B、T淋巴细胞衰减因子(BTLA)、调节性T细胞(Treg)的表达。方法选取60例AS患者,检测患者血小板参数,采用流式细胞术检测外周血BTLA及Treg的表达,观察AS患者血小板变化及其影响因素...目的观察强直性脊柱炎(AS)患者血小板参数的变化及外周血B、T淋巴细胞衰减因子(BTLA)、调节性T细胞(Treg)的表达。方法选取60例AS患者,检测患者血小板参数,采用流式细胞术检测外周血BTLA及Treg的表达,观察AS患者血小板变化及其影响因素。结果 AS患者存在血小板参数异常变化,表现为PLT、PCT的升高。与正常组比较,AS患者外周血BTLA及Treg的表达降低;与BTLA正常者比较,BTLA异常组血小板参数PLT、PCT升高;与Treg正常者比较,Treg异常者血小板参数PLT、PCT升高,MPV降低(P<0.05 or P<0.01)。血小板参数与BTLA、Treg及C3、hs-CRP、IGG存在一定相关性(P<0.05 or P<0.01)。结论 AS患者外周血BTLA、Treg表达降低可能是引起血小板参数异常的原因。展开更多
文摘In the event of blood vessel damage, human platelets are promptly recruited on the site of injury and, after their adhesion, activation and aggregation, prevent blood loss with the formation of a clot. The consequence of abnormal regulation can be either hemorrhage or the development of thrombosis. Qualitative and/or quantitative defects in platelets promote bleeding, whereas the residual reactivity of platelets, despite antiplatelet therapies, play an important role in promoting arterial thrombotic complications. Platelet function is traditionally assessed to investigate the origin of a bleeding syndrome, to predict the risk of bleeding prior surgery or during pregnancy or to monitor the efficacy of antiplatelet therapy in thrombotic syndromes that, now, can be considered a new discipline. "Old" platelet function laboratory tests such as the evaluation of bleeding time and the platelet aggregation analysis inplatelet-rich plasma are traditionally utilized to aid in the diagnosis and management of patients with platelet and hemostatic disorders and used as diagnostic tools both in bleeding and thrombotic diathesis in specialized laboratories. Now, new and renewed automated systems have been introduced to provide a simple, rapid assessment of platelet function including point of care methods. These new methodologies are also suitable for being used in non-specialized laboratories and in critical area for assessing platelet function in whole blood without the requirement of sample processing. Some of these methods are also beginning to be incorporated into routine clinical use and can be utilized as not only as first panel for the diagnosis of platelet dysfunction, but also for monitoring anti-platelet therapy and to potentially assess risk of both bleeding and/or thrombosis.
文摘AIM:To investigate the diagnostic accuracy of the mean platelet volume and platelet distribution width in acute appendicitis.METHODS:This retrospective,case-controlled study compared 295 patients with acute appendicitis(Group?Ⅰ),100 patients with other intra-abdominal infections(GroupⅡ),and 100 healthy individuals(GroupⅢ)between January 2012 and January 2013.The age,gender,and white blood cell count,neutrophil percentage,mean platelet volume,and platelet distribution width values from blood samples were compared among the groups.Statistical analyses were performed using SPSS for Windows 21.0 software.In addition,the sensitivity,specificity,positive and negative predictive values and likelihood ratios,and diagnostic accuracy were calculated.RESULTS:The mean ages of patients were 29.9±12.0years for Group?Ⅰ,31.5±14.0 years for GroupⅡ,and30.4±13.0 years for GroupⅢ.Demographic features such as age and gender were not significantly different among the groups.White blood cell count,neutrophil percentage and platelet distribution width were significantly higher in Group?Ⅰ?compared to groupsⅡandⅢ(P<0.05).Diagnostically,the sensitivity,specificity and diagnostic accuracy were 73.1%,94.0%,and 78%for white blood cell count,70.0%,96.0%,and 76.0%for neutrophil percentage,29.5%,49.0%,and 34.0%for mean platelet volume,and 97.1%,93.0%,and 96.0%for platelet distribution width,respectively.The highest diagnostic accuracy detected was for platelet distribution width between Group?Ⅰ?and GroupⅢ(P<0.01).CONCLUSION:Platelet distribution width analysis can be used for diagnosis of acute appendicitis without requiring additional tests,thus reducing the cost and loss of time.
文摘目的观察强直性脊柱炎(AS)患者血小板参数的变化及外周血B、T淋巴细胞衰减因子(BTLA)、调节性T细胞(Treg)的表达。方法选取60例AS患者,检测患者血小板参数,采用流式细胞术检测外周血BTLA及Treg的表达,观察AS患者血小板变化及其影响因素。结果 AS患者存在血小板参数异常变化,表现为PLT、PCT的升高。与正常组比较,AS患者外周血BTLA及Treg的表达降低;与BTLA正常者比较,BTLA异常组血小板参数PLT、PCT升高;与Treg正常者比较,Treg异常者血小板参数PLT、PCT升高,MPV降低(P<0.05 or P<0.01)。血小板参数与BTLA、Treg及C3、hs-CRP、IGG存在一定相关性(P<0.05 or P<0.01)。结论 AS患者外周血BTLA、Treg表达降低可能是引起血小板参数异常的原因。
