血小板平均体积在慢性阻塞性肺疾病急性加重期的变化

目的探讨血小板平均体积(MPV)在慢性阻塞性肺疾病急性加重期(AECOPD)的变化。方法 AECOPD患者327例,健康对照组98例,分别检测两组研究对象血清MPV,观察MPV在AECOPD患者血清中的变化。严重程度分级:Ⅰ级48例,Ⅱ级67例,Ⅲ级112例,Ⅳ级100例,用单因素方差分析对比各分级之间MPV的变化。结果 AECOPD患者MPV为(10.69±0.96)fl,健康对照组为(10.51±0.66)fl,两组差异显著(P0.05)。AECOPD患者各分级之间MPV比较差别无统计学意义(P0.05)。结论 AECOPD患者血清MPV较健康对照组明显升高,可能与AECOPD的发病及严重程度有关。     

平均血小板体积与心脑血管疾病的研究进展

正血小板主要参与凝血与血栓形成,其在正常的血液循环中不发挥其凝血等功能,但在血管内皮损伤或某些病理生理刺激因子作用下则发生黏附、变形、聚集、释放等活化过程~([1])。血小板参数中的血小板计数(PLT),血小板比容(PCT),平均血小板体积(MPV),血小板体积分布宽度(PDW)等指标均可反映血小板的情况和功能,其中MPV反映了血小板的大小及活化情况~([2]),是该领域当前的研究热点。既往研究证实,     

2型糖尿病伴急性脑梗死患者平均血小板体积的变化及意义

选取50例2型糖尿病伴急性脑梗死患者作为A组,50例2型糖尿病非急性脑梗死患者作为B组,50例无糖尿病的急性脑梗死患者作为C组;对三组的MPV等指标进行测定,并分析其变化和影响因素。结果 A组和C组患者的PLT水平均明显低于B组,MPV、PDW、FIB水平明显上升高于B组,组间比较P<0.05,差异显著;PT、APTT等指标间比较无明显差异(P>0.05)。A组和C组的舒张压和收缩压显著高于B组,P<0.05,差异明显;A组患者的餐后2h血糖、空腹血糖、糖化血蛋白水平均高于B组和C组,C组患者血糖各项指标趋于正常,B组餐后2h血糖、空腹血糖、糖化血蛋白水平高于C组,P<0.05,统计学差异显著;A组总胆固醇、三酰甘油、低密度脂蛋白显著升高,高于B组和C组,C组高于B组,且A组高密度脂蛋白低于B组和C组,C组低于B组,P<0.05,统计学差异显著。多因素回归性分析显示:血糖、血压的急骤波动、MPV、FIB、总胆固醇、三酰甘油、低密度脂蛋白水平升高、高密度脂蛋白水平降低是急性脑梗塞的危险因素(OR=2.571、1.726、1.953、2.417、1.863、2.868、1.397、0.462),P均<0.05,统计学差异显著。结论 2型糖尿病伴急性脑梗死患者MPV明显升高,MPV对急性脑梗死预防和治疗的一定指导意义。     

急性心肌梗死患者平均血小板体积变化的意义

平均血小板体积(MPV)可以很好地反映血小板的活化.体积大的血小板含有的颗粒多,代谢性、酶的活性以及聚集性都强,形成血栓的能力更强.临床研究中急性心肌梗死(AMI)患者MPV显著高于非AMI者,其中MPV较高者发生全因死亡、再缺血、无复流等临床事件的风险明显升高.对于AMI患者,MPV联合白细胞等指标对再灌注损伤有一定的预测作用.证据表明MPV有可能成为临床筛选AMI高危患者的简单指标.     

平均血小板体积在心脏介入治疗中的临床意义

近些年来,由于人口老龄化,经济的发展,生活、工作节奏的加快,人民生活水平的提高,部分人体力活动量减少,体重增加。为此,冠心病的发病量明显的增高,而且有发病年轻化的趋势,应引起人们的关注。自1977年9月16日瑞士苏黎世大学医院已故的Andreas R. Grüntzig对年轻的心绞痛患者实施的第一例球囊血管成形术以来,心脏介入治疗对心血管医学的兴起做出了重要作用。随着药物洗脱支架的出现,支架内再狭窄变得没那么重要,但无论它是否成为影响一些包括死亡率的不良预后的因素,它依然是存在争议的临床难题。血小板全程参与了冠状动脉粥样硬化的发展、斑块破裂和血栓的形成。血小板分泌和释放了介导凝血、炎症和导致动脉粥样硬化的物质。血小板活性与冠心病发病密切相关,而平均血小板体积(MPV)是血小板活性的一个标志。采用MPV是否可以快捷又经济对接受心脏介入治疗的冠心病患者进行危险分层、预测经皮冠状动脉介入治疗(PCI)术中和术后的合并症是学者们研究较多的题目之一。     

脑梗死患者平均血小板体积改变的临床观察

脑梗死(CI)多在动脉粥样硬化基础上发生,CI的重要病理基础为血管内血栓的形成,在这一过程中血小板(PLT)的功能起重要决定作用。而平均血小板体积(MPV)是PLT活化的重要指标,为此,我们观察了152例CI病人的MPV的变化情况,以期发现两者之间的关系。1资料与方法1·1病例选择入选的15     

平均血小板体积与冠心病的相关性

目的通过分析不同类型冠心病患者的平均血小板体积水平,研究平均血小板体积和冠心病的相关性。方法 237例接受冠脉造影的患者分为3组:急性冠脉综合征、稳定型心绞痛和非冠心病组。冠心病的诊断标准为至少1根血管狭窄50%,所有的冠脉造影图像是由两个医生(双盲情况下)完成。对所有入选患者测量其平均血小板体积。结果与非冠心病组相比,急性冠脉综合征组平均血小板体积显著增高(P0.05);平均血小板体积在稳定型心绞痛组与急性冠脉综合征及非冠心病组患者之间无显著差异(P0.05)。结论平均血小板体积与冠心病存在显著相关性,但与冠心病的程度无显著相关性。     

平均血小板体积与急性冠状动脉综合征相关性的研究进展

正急性冠状动脉综合征(acute coronary syndrome,ACS)是临床上常见的严重冠心病类型,是指在各种危险因子作用下冠状动脉粥样斑块稳定性下降、破裂和血栓形成,引起冠状动脉血管腔急性部分或完全阻塞,导致病变血管供应区域心肌细胞发生急性缺血缺氧性损伤、坏死。血小板和炎症在动脉粥样硬化和血栓形成中起重要作用,对ACS的发生均有促进作用。平均血小板体积(mean platelet volume,MPV)作为反映血小板活化状态的生物学指标,与ACS的相关性一直是     

血小板活化因子与支气管哮喘

血小板活化因子是引起支气管哮喘的重要介质之一,当正常细胞或炎性细胞受到特异性和非特异性刺激后,可合成和释放血小板活化因子。它具有很强的缩支气管作用,并能提高支气管反应性,从而影响支气管哮喘的发生与发展。     

脑梗死病人平均血小板体积的改变及临床意义

目的 :探讨脑梗死 (CI)病人平均血小板体积 (MPV )的改变及临床意义。方法 :测定 12 7例CI病人急性发作期以及恢复期MPV、血小板计数 (PLT )、血小板体积分布宽度 (PDW )。 80例健康体检者作为对照。结果 :CI病人急性期较恢复期及对照组MPV、PDW明显升高 ,PLT显著下降 (P <0 .0 1)。CI病人不同梗死面积组之间MPV差异显著 ,梗死面积越大 ,MPV越大。结论 :MPV与CI密切相关 ,并且是CI的一个独立的危险因素。动态监测CI病人的MPV ,一方面有助于病人病情轻重程度的判定 ,一方面可以了解CI病人血小板的活化情况 ,及时调节抗血小板治疗 ,以便改善脑梗死的预后。     

Mean platelet volume and mean platelet volume/platelet count ratio in infective endocarditis

Abstract

Infective endocarditis (IE), an infection of the endocardial surface, frequently leads to life-threatening complications, such as thromboembolism due to platelet activation. We investigated the mean platelet volume (MPV) in Korean patients with IE and the serial changes thereof, in comparison with other laboratory parameters. We analyzed 248?MPV results from 22 patients diagnosed with IE in our hospital between January 2011 and April 2012. MPV was measured with an Advia 2120 (Siemens Healthcare Diagnostics, Tarrytown, NY) using EDTA-containing tubes. The mean MPV differed significantly between the patient and control groups, 8.74 vs. 7.96?fl, respectively. In addition, the platelet count and MPV/platelet count ratio were significantly decreased in the patient group. The total platelet mass and platelet size in IE might be increased. Further studies should examine more patients to verify the changes in the MPV and MPV/platelet count ratio in IE and assess in greater detail the relationship between MPV and thrombotic complications caused by platelet activation.     

Hypertension is an independent predictor of mean platelet volume in patients with acute ischaemic stroke

Introduction: Mean platelet volume (MPV) was shown to be significantly increased in patients with acute ischaemic stroke, especially in non‐lacunar strokes. Moreover, some studies concluded that increased MPV is related to poor functional outcome after ischaemic stroke, although this association is still controversial. However, the determinants of MPV in patients with acute ischaemic stroke have never been investigated. Subjects and methods: We recorded the main demographic, clinical and laboratory data of consecutive patients with acute (admitted within 24 h after stroke onset) ischaemic stroke admitted in our Neurology Service between January 2003 and December 2008. MPV was generated at admission by the Sysmex XE‐2100 automated cell counter (Sysmex Corporation, Kobe, Japan) from ethylenediaminetetraacetic acid blood samples stored at room temperature until measurement. The association of these parameters with MPV was investigated in univariate and multivariate analysis. Results: A total of 636 patients was included in our study. The median MPV was 10.4 ± 0.82 fL. In univariate analysis, glucose (β= 0.03, P= 0.05), serum creatinine (β= 0.002, P= 0.02), haemoglobin (β= 0.009, P < 0.001), platelet count (β=?0.002, P < 0.001) and history of arterial hypertension (β= 0.21, P= 0.005) were found to be significantly associated with MPV. In multivariate robust regression analysis, only hypertension and platelet count remained as independent determinants of MPV. Conclusions: In patients with acute ischaemic stroke, platelet count and history of hypertension are the only determinants of MPV.     

Use of the platelet histogram maximum in evaluating thrombocytopenia

The purpose of this study was to compare the mean platelet volume (MPV) and the highest peak of the platelet volume distribution curve (maximum of the platelet histogram) with regard to their ability to discriminate between thrombocytopenia due to decreased platelet production or increased platelet destruction. A total of 156 children were studied. Twenty-eight had a diagnosis of idiopathic thrombocytopenic purpura (ITP) and 128 had a low platelet count due to decreased production. MPV and maximum of the platelet histogram were obtained by using the Coulter Counter Max M (Coulter Diagnostics, Hialeah, FL). A comparison of the sensitivity and specificity for the MPV and the maximum of the histogram has been made using the method of the receiver operating characteristic curves. The results show that the maximum of the histogram is superior to the MPV and is a highly effective test for the evaluation of thrombocytopenia. We recommend the use of the maximum rather than the MPV to help distinguish between ITP and thrombocytopenia secondary to decreased platelet production. Am. J. Hematol. 60:19–23, 1999. © 1999 Wiley-Liss, Inc.     

The effect of aspirin on mean platelet volume in patients with paroxysmal atrial fibrillation

Aspirin is one of the preferred therapies in the primary prevention of ischemic stroke in paroxysmal atrial fibrillation (PAF). Mean platelet volume (MPV) is a marker of platelet size and activation. Increased MPV reflects active and large platelets. The present observational study was designed to investigate whether aspirin treatment does affect MPV levels in patients with PAF. The study included 101 patients who were detected to have PAF by 24-hour Holter monitoring and divided into two groups based on aspirin treatment [ASA (+) and ASA (?)]. MPV was measured. Patients with aortic and mitral stenosis, hyperthyroidism, hypothyroidism, malignancy, infection, and pregnancy were excluded from the study. Of the 101 patients, 50 had no antiplatelet therapy and 51 had daily aspirin (100?mg) intake. Mean age of the patients was 66?±?10 years and 35 (68%) were male in ASA (+) group. There was no difference in median levels of MPV (9.9 vs. 10.2?fl, respectively; p?=?0.9) between groups. Both uni- and multivariate logistic regression analyses did not show an association between MPV and ASA use. Our results indicate that MPV as a predictive marker of platelet size and activity is not affected by aspirin use in patients with PAF.     

The effect of weight loss on the mean platelet volume in obese patients

Obesity is a chronic metabolic disorder associated with cardiovascular disease and atherosclerosis. Platelet activation and aggregation are central processes in the pathophysiology of cardiovascular disease. Mean platelet volume (MPV), a determinant of platelet activation, is a newly emerging risk marker for atherothrombosis. Our objective was to evaluate the effect of weight loss on the MPV in obese patients. We selected 30 obese women patients and 30 non-obese healthy women subjects. All obese patients took the same content and caloric diet treatment for 3 months. Body mass index (BMI), metabolic parameters and MPV were measured at baseline and after 3 months diet treatment. Before diet treatment, obese group had significantly higher MPV levels than in the non-obese control group (8.18?±?1.09 fl vs. 8.01?±?0.95 fl, p?=?0.004). MPV showed positive correlations with BMI level in the obese group (r?=?0.43, p?=?0.017). BMI significantly decreased after diet treatment (36.2?±?3.2?kg/m² vs. 34.7?±?3.6?kg/m², p?<?0.001), in the obese group. MPV significantly decreased after diet treatment in the obese group (8.18?±?1.09 fl vs. 8.08?±?1.02 fl, p?=?0.013). There was a positive correlation between weight loss and reduction in MPV (r?=?0.41, p?=?0.024). In addition to its well-known positive effects on cardiovascular disease risk, weight loss may also possess significant anti-platelet activation properties that can contribute its antiatherogenic effects in obese patients.     

Atrial fibrillation is associated with increased mean platelet volume in patients with type 2 diabetes mellitus

Platelet abnormalities in diabetes mellitus (DM) and atrial fibrillation (AF) may underline the etiology of a prothrombotic state in these conditions. Increased mean platelet volume (MPV) is a marker of abnormal platelet function and activation. We aimed to investigate the possible association of chronic AF with MPV in patients who have type 2 DM. Patients who had type 2 DM with either chronic (≥6 months) AF or normal sinus rhythm (NSR) were included in the study. A total of 162 patients (aged 38–89 years) were divided into 2 groups according to the presence of either AF or NSR. Group 1 consisted of 81 diabetic patients with AF, and group 2 consisted of 81 diabetic patients with NSR. The two groups were not significantly different in terms of age, and gender, as well as in hypertension, smoking, history of coronary artery disease, previous cerebrovascular accidents, microalbuminuria, retinopathy, duration of DM, body mass index, hemoglobin A_1c, total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, and triglyceride (p?>?0.05 for all variables). Although no significant difference was present between groups concerning platelet count; for patients with AF, MPV was higher compared with patients with NSR (9.0?±?0.2?fl vs. 8.4?±?0.2?fl; p?=?0.001). Furthermore, no significant difference was noted between groups regarding routine medications received by patients. In multivariate logistic regression analysis, MPV was the only variable independently related to AF (OR?=?2.659; 95% CI, 1.286–5.498; p?=?0.008). Consequently, it is concluded that AF is associated with increased MPV in patients with type 2 DM, suggesting the presence of tentatively related processes leading to reciprocal interaction.     

The relationship between mean platelet volume with microalbuminuria and glycemic control in patients with type II diabetes mellitus

Microalbuminuria is the best predictor of diabetic nephropathy development in patients with type II diabetes mellitus (DM). It is also accepted as an indicator of diabetic microangiopathy. Increased activation of platelets has been suggested to be involved in the pathogenesis of vascular complications. In light of these findings, this study was designed to investigate the association of microalbuminuria — an indicator glycemic control and microangiopathy — with mean platelet volume (MPV). Subjects underwent laboratory analyses and their MPV, HbA1c, serum creatinine, fasting, and postprandial blood glucose levels and 24-hour urine albumin levels were recorded. All statistical analyses were performed using SPSS v13.0 for Windows XP. Mann–Whitney U-test, student's t-test, spearman correlation analysis, ROC analysis, categorical regression analysis, and chi-square test were used for statistical evaluations. The study included 354 patients with type II DM. The median MPV value of microalbuminuria-positive patients was 9 (8–9.5)?fl while MPV of patients without microalbuminuria was 8.5 (8–9.2)?fl and the difference was statistically significant (p?=?0.004). We determined positive correlation between MPV and 24-hour urine microalbuminuria (r?=?0.14, p?=?0.009). There were no significant differences between patients with HbA1c levels below and above 7% in terms of MPV (p?>?0.05). We determined no correlation between MPV and HbA1c levels (r?=??0.36, p?=?0.64). This study determined a significant positive relationship between microalbuminuria — a microvascular complication of diabetes — and MPV. No significant correlation was identified between poor glycemic control and MPV in diabetic patients. However, we are in the opinion that the association between poor glycemic control and MPV in type II diabetic patients should be investigated in prospective studies with larger samples.     

Increased mean platelet volume and mean platelet volume/platelet count ratio in Korean patients with deep vein thrombosis

The mean platelet volume (MPV) is a laboratory marker associated with platelet function and activity. Increased MPV in thromboembolic disease is considered an important risk factor. The aim of this study was to compare the MPV and MPV/platelet count (MPV/P) ratio between deep vein thrombosis (DVT) and control subjects. We retrospectively reviewed the medical records of patients (n?=?91) admitted due to newly diagnosed DVT from December 2010 to March 2012. The control group (n?=?311) underwent health screening at our Hospital. Median MPV was higher in DVT patients compared to controls (8.6?fl vs. 7.9?fl, p?<?0.0001). The DVT patients also had a higher MPV/P ratio compared to the control group (0.0388?fl/(10⁹/l) vs. 0.0308?fl/(10⁹/l), p?<?0.0001). MPV was inversely correlated with platelet count in DVT patients (correlation coefficient?=??0.33, p?=?0.001). Receiver operator characteristic analysis revealed that an MPV cutoff value of 8.2?fl provided 70.3% sensitivity and 72.7% specificity. An MPV/P cutoff value of 0.0363?fl/(10⁹/l) showed 60% sensitivity and 73% specificity. MPV and MPV/P ratio could be considered meaningful laboratory markers for the risk of DVT.