scholarly journals The Effect of Mean Platelet Volume/Platelet Count Ratio on Dipper and Non-Dipper Blood Pressure Status

Medicina ◽  
2019 ◽  
Vol 55 (11) ◽  
pp. 742 ◽  
Author(s):  
Murat Meric ◽  
Serkan Yuksel ◽  
Metin Coksevim ◽  
Okan Gulel
Keyword(s):  
Blood Pressure ◽  
Platelet Count ◽  
Mean Platelet Volume ◽  
Platelet Reactivity ◽  
Area Under The Curve ◽  
Platelet Activity ◽  
Platelet Volume ◽  
Roc Curve Analysis ◽  
The Mean ◽  
Baseline Characteristics

Background and Objectives: The mean platelet volume (MPV) represents a possible marker of platelet activation. There is an association between the platelet count (PC) and inflammation and platelet reactivity. We assessed the association between the MPV/PC ratio and circadian alterations in blood pressure (BP). Material and Methods: One hundred and twenty subjects in total, 80 hypertensive subjects and 40 healthy subjects (controls), were enrolled in the study group. Twenty four hour ambulatory BP monitoring (ABPM) was applied to all subjects. According to ABPM results, the hypertensive subjects were separated into two groups, such as dippers (n = 40) and non-dippers (n = 40). In all subjects, the collection of venous peripheral blood samples was performed on admission for PC and MPV measurements. Results: The two groups exhibited similar clinical baseline characteristics. A significantly higher MPV/PC ratio was determined in non-dippers compared to that in dippers and normotensives. The higher MPV/PC ratio was observed in non-dippers in comparison with that in dippers and normotensives (0.046 ± 0.007 to 0.032 ± 0.004 fL/[109/L]; 0.046 ± 0.007 to 0.026 ± 0.004 fL/[109/L], p < 0.001, respectively). A receiver operating characteristic (ROC) curve analysis showed that the optimum cut-off value of the MPV/PC ratio for predicting non-dipping patterns in hypertensive patients was 0.036 (area under the curve [AUC]: 0.98, p < 0.001). According to the cut-off value, sensitivity and specificity were found to be 95% and 95%, respectively. Conclusions: The higher MPV/PC ratio was determined in non-dipper hypertensive subjects in comparison with that in dipper hypertensive subjects. An elevation of platelet activity and an increase in thrombus burden are reflected by an increase in the MPV/PC ratio. The MPV/PC ratio may underlie the increase in cardiovascular risk in non-dippers compared to that in dippers.

scholarly journals An Adjunct Indicator for the Diagnosis of Fracture-Related Infections: Platelet Count to Mean Platelet Volume Ratio

2020 ◽  
Vol 5 (2) ◽  
pp. 54-59
Author(s):  
John Strony ◽  
Taylor Paziuk ◽  
Brianna Fram ◽  
Kyle Plusch ◽  
Gerard Chang ◽  
...  
Keyword(s):  
Platelet Count ◽  
Roc Curve ◽  
Mean Platelet Volume ◽  
Area Under The Curve ◽  
Volume Ratio ◽  
Curve Analysis ◽  
Platelet Volume ◽  
Roc Curve Analysis ◽  
Significant Difference ◽  
Fracture Nonunion

Abstract. Introduction: Fracture-related infection (FRI) is a common complication associated with orthopaedic fracture care. Diagnosing these complications in the preoperative setting is difficult. Platelets are a known acute phase reactant with indices that change in accordance with infection and inflammation. The purpose of our study was to assess the diagnostic utility of platelet indices at assessing FRI.Methods: A retrospective review performed for all patients who underwent revision surgery for fracture nonunion between 2013 and 2018. Radiographs were employed to define nonunion. Intraoperative cultures were used to define FRI. Receiver operator characteristic (ROC) curve analysis was used to assess the diagnostic ability of preoperative erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), and the platelet count/mean platelet volume ratio (P/V) at recognizing FRI.Results: Of the 53 revision surgeries that were performed for fracture nonunion, 17 (32.1%) were identified as FRI. There were no significant demographic differences between the two cohorts. Patients with FRIs exhibited higher values for ESR (54.82 vs. 19.16, p<0.001), CRP (0.90 vs. 0.35, p=0.003), and P/V (37.4 vs. 22.8, p<0.001) as compared to those within the aseptic nonunion cohort. ROC curve analysis for P/V demonstrated that at an optimal ratio of 23, area under the curve (AUC) is 0.814, specificity is 55.6%, and sensitivity is 100.0%. There was no significant difference in the diagnostic performance of the serum biomarkers but only ESR and P/V had an AUC greater than 0.80. The negative predictive value (NPV) for P/V, ESR, and CRP was 100.0%, 84.6%, and 78.6%, respectively.Conclusion: The P/V ratio may serve as a reliable screening test for FRI.

Acute and Chronic Changes in Platelet Volume and Count After Cardiopulmonary Bypass Induced Thrombocytopenia in Man

1987 ◽  
Vol 57 (01) ◽  
pp. 55-58 ◽  
Author(s):  
J F Martin ◽  
T D Daniel ◽  
E A Trowbridge
Keyword(s):  
Platelet Count ◽  
Mean Platelet Volume ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Control Group ◽  
Artery Bypass Graft ◽  
Platelet Volume ◽  
Young Males ◽  
The Mean

SummaryPatients undergoing surgery for coronary artery bypass graft or heart valve replacement had their platelet count and mean volume measured pre-operatively, immediately post-operatively and serially for up to 48 days after the surgical procedure. The mean pre-operative platelet count of 1.95 ± 0.11 × 1011/1 (n = 26) fell significantly to 1.35 ± 0.09 × 1011/1 immediately post-operatively (p <0.001) (n = 22), without a significant alteration in the mean platelet volume. The average platelet count rose to a maximum of 5.07 ± 0.66 × 1011/1 between days 14 and 17 after surgery while the average mean platelet volume fell from preparative and post-operative values of 7.25 ± 0.14 and 7.20 ± 0.14 fl respectively to a minimum of 6.16 ± 0.16 fl by day 20. Seven patients were followed for 32 days or longer after the operation. By this time they had achieved steady state thrombopoiesis and their average platelet count was 2.44 ± 0.33 × 1011/1, significantly higher than the pre-operative value (p <0.05), while their average mean platelet volume was 6.63 ± 0.21 fl, significantly lower than before surgery (p <0.001). The pre-operative values for the platelet volume and counts of these patients were significantly different from a control group of 32 young males, while the chronic post-operative values were not. These long term changes in platelet volume and count may reflect changes in the thrombopoietic control system secondary to the corrective surgery.

scholarly journals Dynamic Change in Mean Platelet Volume and Delayed Cerebral Ischemia After Aneurysmal Subarachnoid Hemorrhage

2020 ◽  
Vol 11 ◽  
Author(s):  
Liuwei Chen ◽  
Quanbin Zhang
Keyword(s):  
Subarachnoid Hemorrhage ◽  
Cerebral Ischemia ◽  
Mean Platelet Volume ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Dynamic Change ◽  
Delayed Cerebral Ischemia ◽  
Area Under The Curve ◽  
Platelet Volume ◽  
The Mean ◽  
Change In Mean

Background: The mean platelet volume (MPV) has been shown to predict short-term outcomes in patients who have experienced aneurysmal subarachnoid hemorrhage (aSAH). The purpose of this study was to explore the temporal variation of MPV in patients with aSAH and its relationship to the development of delayed cerebral ischemia (DCI).Methods: Data from 197 consecutive aSAH patients who were treated at our institution between January 2017 and December 2019 were collected and analyzed. Blood samples to assess MPV were obtained at 1–3, 3–5, 5–7, and 7–9 d after the initial hemorrhage. Univariate and multivariate analyses were performed to investigate whether MPV was an independent predictor of DCI and the receiver operating characteristic (ROC) curve and area under the curve (AUC) were determined.Results: The MPV values in patients with DCI were significantly higher compared to those without DCI at 1–3, 3–5, 5–7, and 7–9 d after hemorrhage (P &lt; 0.001). The trend for MPV in patients with DCI was increased at first and then decreased. The transition from increases to decreases occurred at 3–5 d after hemorrhage. The optimal cutoff value for MPV to accurately predict DCI was 10.35 fL at 3–5 d after aSAH in our cohort. Furthermore, the MPV observed at 3–5 d was an independent risk factor for DCI [odds ratio (OR) = 4.508, 95% confidence interval (CI): 2.665–7.626, P &lt; 0.001].Conclusions: MPV is a dynamic variable that occurs during aSAH, and a high MPV at 3–5 days after hemorrhage is associated with the development of DCI.

scholarly journals The behavior of Mean Platelet Volume in Sepsis in critical patients with and without sepsis

Bionatura ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 1812-1817
Author(s):  
Pablo Andrés Vélez ◽  
Lucy Baldeón R ◽  
Jorge Luis Vélez-Paez
Keyword(s):  
Mean Platelet Volume ◽  
Statistical Significance ◽  
Area Under The Curve ◽  
Biological Behavior ◽  
P Value ◽  
Platelet Volume ◽  
Significant Area ◽  
The Mean ◽  
Critical Patients ◽  
Elevated Lactate

The mean platelet volume is an anatomical biomarker that has shown its usefulness in various cardiovascular and metabolic pathologies; in sepsis, it has been positioning itself as an indicator of mortality, easily accessible and immediately applicable when reported in the routine blood count. This study demonstrates the mean platelet volume's biological behavior in critical patients with sepsis compared with non-septic patients. An observational, longitudinal, prospective, monocentric cohort study was conducted in 250 patients treated at the intensive care unit of the Pablo Arturo Suárez Hospital, Quito- Ecuador, from January 2019 January 2020. A group of patients with sepsis (n = 125) and without infectious pathologies (n = 125) were studied. The inclusion criteria were patients over 18 years of age of both genders, diagnosed with sepsis or septic shock using SEPSIS 3 criteria, and patients without septic pathology. The mean platelet volume (MPV) of days 1, 2, and 3 were studied. Septic patients had a mean APACHE (18.74 SD 9.52) higher than the non-septic ones (11.93 SD 7.01) (p = < 0.000). The MPV was consistently higher in patients with sepsis than non-septic patients, but it reached statistical significance on day 3 (9.13 SD 1.55 vs. 8.66 SD 1.34, p=0.042). The MPV on day 3 presented a significant area under the curve (AUC =0.580) (CI. 0.500-0.661), where the cut-off point according to Youden's index was positive for sepsis if MPV≥ 9.85 femtoliter (fL) with OR=3.30 and p-value= 0.005. Likewise, lactate on admission showed an AUC of 0.625 (CI. 0.555-0.694), with a cut-off point ≥of 1.15 mmol / L, OR=2.51, and p=0.007. Age and hypertension did not show a multivariate relationship with the presence of sepsis. It was shown that MPV is higher in patients with sepsis compared to non-septic ones. This observation reaches significance on day 3. Additionally, elevated lactate at admission was also associated with a septic state. On the other hand, platelet count did not show the expected behavior.

scholarly journals MEAN PLATELET VOLUME DI STROK

2016 ◽  
Vol 19 (1) ◽  
pp. 37
Author(s):  
Besse Rosmiati ◽  
Sulina Y Wibawa ◽  
Darmawaty ER
Keyword(s):  
Cohort Study ◽  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mean Platelet Volume ◽  
Modified Rankin Scale ◽  
Platelet Activity ◽  
Stroke Patients ◽  
Platelet Volume ◽  
P Values ◽  
The Mean

Ischemic stroke is the cause of most cases which occur due to obstruction, this pathogenesis can be caused by the formation of thrombus in the cerebrum blood vessels. Platelet aggregation plays a role in the pathogenesis of thromboembolic cerebrovascular disease. Platelets size, measured as Mean Platelet Volume (MPV) is a marker of platelet function and is associated with the indicator of platelet activity. Several studies have found that there was an increased of MPV in acute ischemic stroke while the correlation with the severity and outcome of stroke was still controversial. The aim of study is to determine the MPV and their association with outcomes in acute ischemic stroke patients. A cohort study during May up to July 2010 was carried out, the researchers measured MPV and analyze their correlation with its outcome using modified Rankin scale score 10 days after the onset in 33 acute ischemic stroke patients. The mean of MPV for the first three days of the onset was 8.9 fl, on the 5th day was increased up to 9.4 but at the 10th day of onset the MPV remains the same value as the 5th day. The MPV of first three days and 5th day have a positive correlation, but insignificant with their outcome, with p values 0.158 and 0.06, respectively. From this study can be concluded that the increased of MPV on the fifth day onset did not have any significant correlation with the outcome of acute ischemic stroke illness.

scholarly journals Determination of Platelet Parameters with Impedance Automated Analyzers in Diabetic Patients with Coronary Artery Disease

2019 ◽  
Vol 70 (4) ◽  
pp. 1242-1244
Author(s):  
Maria-Cristina Apavaloaie (Vladeanu) ◽  
Iris Bararu Bojan ◽  
Oana Viola Badulescu ◽  
Carmen Elena Plesoianu ◽  
Daniela Jitaru ◽  
...  
Keyword(s):  
Coronary Artery Disease ◽  
Coronary Artery ◽  
Mean Platelet Volume ◽  
Cardiovascular Complications ◽  
Diabetic Patients ◽  
Platelet Activity ◽  
Platelet Volume ◽  
Distribution Width ◽  
The Mean ◽  
Artery Disease

Atherosclerosis and platelet activity are two important chain factors linked together in the onset and the severity of coronary artery disease. Our study included 60 diabetic patients with ischemic heart disease, all having underwent coronary angiography. In this substudy from a larger epigenetical and genetical study, we phocused on the interrelationship between vessel disease and primary hemostasis. The haematological parameters included were platelet count (PLT), the platelet distribution width (PDW), the mean platelet volume (MPV) and the platelet larger cell ratio (P-LCR). ). The severity of the coronary disease was defined by the number of stenotic/occluded coronary arteries. We demonstrated a positive corelation with the duration of diabetes (p=0.032), as 34% of the patients with a long duration of the diabetes had a higher number of platelets. The mean platelet volume was slightly elevated in diabetic females over 65 years old, compared to younger diabetic men, though not statistically significant (p=0.101). Although the investigated parameters were mostly in the normal range, the fact that for some cathegories of patients they were orientated towards the upper limit, raises some questions for the next studies. Future adjustments of lot number and selection criteria for the following studies are needed. Using the MPV as a prediction test for cardiovascular complications is still a controversial subject, since the scientifical background contains both positive and negative studies on this matter.

Evidence of Phylogenetic Canalisation of the Circulating Platelet Mass in Man

1972 ◽  
Vol 27 (01) ◽  
pp. 159-172 ◽  
Author(s):  
W. E von Behrens
Keyword(s):  
Platelet Count ◽  
Mean Platelet Volume ◽  
Total Mass ◽  
Prognostic Significance ◽  
Platelet Volume ◽  
Platelet Size ◽  
Biochemical Function ◽  
Objective Classification ◽  
The Mean ◽  
Platelet Mass

SummaryPhylogenetically mammalian platelets are an apocrine secretion from nucleated thrombocytes, and biologically the number of circulating fragments is irrelevant compared with their total mass and biochemical function. The literature on human genetic derangements affecting the circulating platelet mass is reviewed. The product of platelet count and platelet volume is shown to be “canalised” since many congenital forms of thrombocytopenia are associated with a reciprocal increase in the mean platelet volume. Considerations of platelet size are essential since macrothrombocytopenia is a racial characteristic of many Mediterranean peoples and probably also occurs frequently in others races. The location of platelet disorders in relation to the phylogenetic canal provides an objective classification which has diagnostic, therapeutic and prognostic significance.

Effects of biological variations on platelet count in healthy subjects in China

2004 ◽  
Vol 91 (02) ◽  
pp. 367-372 ◽  
Author(s):  
Jing Yang ◽  
Xiaojun Lu ◽  
Tokuhiro Okada ◽  
Tamiaki Kondo ◽  
Changgeng Ruan ◽  
...  
Keyword(s):  
Platelet Count ◽  
Mean Platelet Volume ◽  
Healthy Subjects ◽  
Bleeding Time ◽  
Platelet Volume ◽  
Platelet Counts ◽  
Normal Platelet Count ◽  
Normal Platelet ◽  
Low Platelet Count ◽  
The Mean

SummaryThe effects of biological variations on platelet counts were investigated in 694 healthy subjects aged 18 to 60 years living in three cities including Chengdu (Sichuan Province), Suzhou (Jiangsu Province) and Harbin (Heilongjang Province) in China. Platelet counts in healthy subjects were significantly lower in Chengdu (52∼202 X 109/L) and Suzhou (60∼259 X 109/L) than in Harbin (154∼348 X 109/L)(p <0.0001), but the mean platelet volume (MPV) determined concurrently was negatively correlated with platelet count, the MPV values were significantly higher in Chengdu (11.8∼15.6 fl) and Suzhou (10.9∼15.8 fl) than in Harbin (9.5∼12.9 fl) (p < 0.0001). Platelet counts were significantly higher in summer (73∼289 X 109/L) than in winter (52∼202 X 109/L) (p <0.0001), but the MPV values were lower in summer (11.2∼14.7 fl) than in winter (11.8∼15.6 fl) (p <0.05) in Chengdu. Platelet associated immunoglobulin (PA-IgG) in Chengdu was revealed to be significantly higher in the low platelet count group (<150 X 109/L, 13.5 ± 7.1 ng/107 PLT) than in the normal platelet count group (≥150 X 109/L, 8.3 ± 2.7 ng/107 PLT)(p <0.0001). Similar results were observed in Suzhou for the reticulated platelet ratio, which was significantly higher in the low platelet count group (19.5 ± 7.1%) than in the normal platelet count group (11.6 ± 2.7%)(p <0.01). The bleeding time in Chengdu showed a significantly longer time in the low platelet count group (8.6 ± 2.3 min) than in the normal platelet count group (6.0 ± 1.2 min)(p <0.01). With regard to the effects of lipids on platelet counts, the HDL values were significantly higher in the normal platelet count group (1.60 ± 0.76 mmol/L) than the low platelet count group (1.23 ± 0.31 mmol/L) (p <0.01); but no significant differences in cholesterol and triglycerides values between the normal and low platelet count groups (p >0.05) were recorded. These findings suggest that the platelet counts could be greatly influenced in healthy subjects by biological variations such as geographical, seasonal, and lipid variations.

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