scholarly journals Intensity of lamella growth as morphofunctional feature of human platelets

2020 ◽  
pp. 30-33
Author(s):  
M. S. Makarov
Keyword(s):  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Growth Velocity ◽  
Blood Donors ◽  
Platelet Adhesion ◽  
Vital Staining ◽  
Human Platelets ◽  
Original Method ◽  
Morphofunctional Analysis

Aim. To study morphofunctional properties of platelet lamella′s forming in donors and patients with thrombotic disorders.Materials and methods. We studied platelets of blood donors, patients with deep venous thrombosis, burned patients with thrombotic disorders. Morphofunctional analysis was performed, using original method, based on cell vital staining.Results. In patients with deep venous thrombosis morphofunctional platelet value was enhanced, in burned patients with thrombotic disorders platelet integrity was low. After 10–15 minutes of adhesion on glass spreading platelets maintained 3 subpopulations: cells without lamella, able to fluent granule efflux (1th type); cell with lamellipodias (2th type); cells with wide lamella, covering cell perimeter (3th type). In donors′ blood most of spreading platelets formed lamella at 1–2 hours, in patients with deep venous thrombosis this process was noticeably accelerated, estimating 30–35 minutes, what is more, spreading platelets viewed both intensive lamella′s growth and rapid degranulation of cells without lamella, followed by aggregation on the glass. Burned patients had significant decay of platelet adhesion, lamella formation was low-identified – less than 20 % of spread platelets formed lamellipodias. Among blood donors one could notice heterogeneous level of platelets, capable to rapid granules′ release during contact with adhesive substrate.Conclusion. The lack of lamella forming may occur both at low and high morphofunctional platelet rate. During deep venous thrombosis lamella′s growth velocity was noticeably increased. Among spreading platelets with granules one could find subpopulation of cells, capable to rapid granules′ release in norm and pathology.

scholarly journals USE OF VITAL STAINING IN STORED HUMAN PLATELETS MORPHOFUNCTIONAL ANALYSIS

2016 ◽  
pp. 83-87
Author(s):  
M. S. Makarov ◽  
E. N. Kobzeva ◽  
I. V. Vysochin ◽  
N. V. Borovkova ◽  
V. B. Khvatov
Keyword(s):  
Vital Staining ◽  
Human Platelets ◽  
Morphofunctional Analysis

Morphofunctional Analysis of Human Platelets by Vital Staining

2014 ◽  
Vol 156 (3) ◽  
pp. 409-412 ◽  
Author(s):  
M. S. Makarov ◽  
E. N. Kobzeva ◽  
I. V. Vysochin ◽  
N. V. Borovkova ◽  
V. T. Khvatov
Keyword(s):  
Vital Staining ◽  
Human Platelets ◽  
Morphofunctional Analysis

Proximal deep venous thrombosis following PTA of the superficial femoral artery – an obligation to disclose a complication that is rarely taken into account

VASA ◽  
2006 ◽  
Vol 35 (1) ◽  
pp. 41-44 ◽  
Author(s):  
Klein-Weigel ◽  
Pillokat ◽  
Klemens ◽  
Köning ◽  
Wolbergs ◽  
...  
Keyword(s):  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Femoral Artery ◽  
Superficial Femoral Artery ◽  
Rare Complication ◽  
Femoral Vein ◽  
Vein Thrombosis ◽  
Explicit Information ◽  
Life Threatening ◽  
Legal Consequences

We report two cases of femoral vein thrombosis after arterial PTA and subsequent pressure stasis. We discuss the legal consequences of these complications for information policies. Because venous thrombembolism following an arterial PTA might cause serious sequel or life threatening complications, there is a clear obligation for explicit information of the patients about this rare complication.

Perforation of inferior vena cava during filter placement

VASA ◽  
2011 ◽  
Vol 40 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Piecuch ◽  
Wiewiora ◽  
Nowowiejska-Wiewiora ◽  
Szkodzinski ◽  
Polonski
Keyword(s):  
Pulmonary Embolism ◽  
Inferior Vena Cava ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Inferior Vena ◽  
Vena Cava ◽  
Retroperitoneal Hematoma ◽  
Ivc Filter ◽  
Filter Placement ◽  
Therapeutic Method

The placement of an inferior vena cava (IVC) filter is a therapeutic method for selected patients with deep venous thrombosis and pulmonary embolism. However, insertion and placement of the filter may be associated with certain complications. For instance, retroperitoneal hematoma resulting from perforation of the wall by the filter is such a very rare but serious complication. We report the case of a 64-year-old woman with perforation of the IVC wall and consecutive hematoma caused by the filter who was treated surgically.

Efficacy of compression stockings in preventing post-thrombotic syndrome in patients with deep venous thrombosis: a systematic review and metaanalysis

VASA ◽  
2016 ◽  
Vol 45 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Jakob Martin Burgstaller ◽  
Johann Steurer ◽  
Ulrike Held ◽  
Beatrice Amann-Vesti
Keyword(s):  
Systematic Review ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Cochrane Library ◽  
Compression Stockings ◽  
Post Thrombotic Syndrome ◽  
Study Results ◽  
Preventive Efficacy ◽  
One Year ◽  
The Cochrane Library

Abstract. Background: Here, we update an earlier systematic review on the preventive efficacy of active compression stockings in patients with diagnosed proximal deep venous thrombosis (DVT) by including the results of recently published trials. The aims are to synthesize the results of the original studies, and to identify details to explain heterogeneous results. Methods: We searched the Cochrane Library, PubMed, Scopus, and Medline for original studies that compared the preventive efficacy of active compression stockings with placebo or no compression stockings in patients with diagnosed proximal DVT. Only randomized controlled trials (RCTs) were included. Results: Five eligible RCTs with a total of 1393 patients (sample sizes ranged from 47 to 803 patients) were included. In three RCTs, patients started to wear compression stockings, placebo stockings or no stockings within the first three weeks after the diagnosis of DVT. The results of two RCTs indicate a statistically significant reduction in post-thrombotic syndrome (PTS) of 50% or more after two or more years. The result of one RCT shows no preventive effect of compression stockings at all. Due to the heterogeneity of the study results, we refrained from pooling the results of the RCTs. In a further RCT, randomization to groups with and without compression stockings took place six months after the diagnosis of DVT, and in another RCT, only patients with the absence of PTS one year after the diagnosis of DVT were analyzed. One RCT revealed a significant reduction in symptoms, whereas another RCT failed to show any benefit of using compression stockings. Conclusions: At this time, it does not seem to be justifiable to entirely abandon the recommendations regarding compression stockings to prevent PTS in patients with DVT. There is evidence favoring compression stockings, but there is also evidence showing no benefit of compression stockings.

Is Quantitative Determination of Fibrin(ogen) Degradation Products and Thrombin-Antithrombin III Complexes Useful to Diagnose Deep Venous Thrombosis in Outpatients?

1989 ◽  
Vol 62 (04) ◽  
pp. 1043-1045 ◽  
Author(s):  
Paul F M M van Bergen ◽  
Eduard A R Knot ◽  
Jan J C Jonker ◽  
Auke C de Boer ◽  
Moniek P M de Maat
Keyword(s):  
Quantitative Determination ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Antithrombin Iii ◽  
Degradation Products ◽  
Family Doctor ◽  
Diagnostic Value ◽  
Impedance Plethysmography ◽  
Fibrin Degradation Products

SummaryWe studied the diagnostic value of recently introduced ELISA’s for the determination of thrombin-antithrombin III (TAT) complexes, fibrin degradation products (FbDP), fibrinogen degradation products (FgDP) and total degradation products (TDP) for deep venous thrombosis (DVT) in plasma of 239 consecutive outpatients, suspected for DVT by their family doctor. DVT was confirmed by impedance plethysmography in 60 patients. Using the 95th percentile range of 42 healthy volunteers the sensitivity for the detection of DVT was: 37% for TAT, 95% for TDP, 92% for FbDP and 90% for FgDP. Specificity was: 88% for TAT, 16% for TDP, 20% for FbDP and 25% for FgDP.We conclude that these assays are of little value in the diagnosis of DVT in outpatients.

Platelet Adhesiveness and Fibrinolysis after Recent Cerebro-Vascular Accidents and their Relationship with Subsequent Deep Venous Thrombosis of the Legs

1976 ◽  
Vol 36 (01) ◽  
pp. 127-132 ◽  
Author(s):  
C. P Warlow ◽  
J. A. N Rennie ◽  
D Ogston ◽  
A. S Douglas
Keyword(s):  
Platelet Count ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Plasminogen Activator ◽  
Fibrinogen Level ◽  
Plasma Fibrinogen ◽  
Platelet Adhesiveness ◽  
Plasma Fibrinogen Level ◽  
Vascular Accidents ◽  
Subsequent Rise

SummaryIn fifteen patients with a cerebro-vascular accident resulting in an acute hemiplegia there was a subsequent rise in the platelet count and plasma fibrinogen level. There were no significant alterations in platelet adhesiveness, plasminogen activator, plasminogen, FR-antigen and haematocrit. Patients diagnosed as developing deep venous thrombosis with the 125I-fibrinogen technique had a significantly lower platelet adhesiveness and plasminogen level than those who were not.

Markers of Hemostatic System Activation in Acute Deep Venous Thrombosis-Evolution during the First Days of Heparin Treatment

1993 ◽  
Vol 70 (06) ◽  
pp. 0909-0914 ◽  
Author(s):  
Keyword(s):  
Molecular Weight ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Unfractionated Heparin ◽  
Low Molecular Weight Heparin ◽  
Factor Xa ◽  
Low Molecular Weight ◽  
Dose Adaptation ◽  
Heparin Treatment ◽  
Lung Scan

SummaryFibrin D-Dimer (D-Di), prothrombin activation fragment (F 1+2) and thrombin-antithrombin III complexes (TAT) were measured using ELISA procedures in the plasma of patients with an acute deep venous thrombosis (DVT), at presentation and on days 2, 6 and 10 after initiation of heparin treatment. Patients were randomly allocated into two treatment groups: 44 patients received adapted doses of continuous intravenous unfractionated heparin (UH) whereas 47 received 1 mg/kg every twelve hours of a low molecular weight heparin (enoxaparin) subcutaneously. A phlebography and a perfusion lung scan were performed before inclusion and on day 10. Failure of therapy (n = 9) was defined by venogram worsening or confirmed pulmonary embolism. Improvement (n = 44) or stationary state (n = 38) were defined by venogram evolution in the absence of new leg scan defects.At presentation, D-Di, F 1 + 2 and TAT were above cut-off values in 97, 66 and 89% of patients respectively. D-Di levels correlated with the extent of venous thrombosis whereas TAT and F 1 + 2 did not. Mean levels of D-Di decreased sharply during the first days of treatment but were still abnormal on day 10. A secondary increase of D-Di on days 6 or 10 by more than 3 μg/ml occurred in 4 of the 9 patients who developed a thromboembolic recurrence but in none of the 72 patients who had a more favorable outcome. F 1 + 2 and TAT time-courses were not related to clinical evolution. In the Enoxaparin group, there was no relationship between antifactor Xa activities and any biological markers. TAT and F 1 + 2 levels fell on day 2 and remained stable until day 10. In contrast, in the UH group, TAT and F 1 + 2 did not significantly decrease on day 2, probably due to a delay in dose adaptation, but they declined slowly until day 10.In conclusion, D-Di displays a higher sensitivity than F 1 + 2 or TAT for the diagnosis of D\T. D-Di, but not TAT or F 1 + 2, follow-up seems to be of potential value for early detection of recurrency. Hemostatic activation is controlled earlier by fixed doses of a low molecular weight heparin, irrespective of the plasma anti-factor Xa activities, than by unfractionated heparin at adapted doses.

Effects of Bupranolol, a New β-Blocker, on Platelet Functions of Rabbit and Human in Vitro

1976 ◽  
Vol 36 (02) ◽  
pp. 376-387 ◽  
Author(s):  
Teruhiko Umetsu ◽  
Kazuko Sanai ◽  
Tadakatsu Kato
Keyword(s):  
Platelet Aggregation ◽  
Platelet Adhesion ◽  
Human Platelets ◽  
Rabbit Platelet ◽  
Rabbit Platelets ◽  
Β Blocker ◽  
Platelet Aggregates ◽  
Induced Aggregation ◽  
Platelet Functions

SummaryThe effects of bupranolol, a new β-blocker, on platelet functions were investigated in vitro in rabbits and humans as compared with propranolol, a well-known β-blocker. At first, the effect of adrenaline on ADP-induced rabbit platelet aggregation was studied because adrenaline alone induces little or no aggregation of rabbit platelets. Enhancement of ADP-induced rabbit platelet aggregation by adrenaline was confirmed, as previously reported by Sinakos and Caen (1967). In addition the degree of the enhancement was proved to be markedly affected by the concentration of ADP and to increase with decreasing concentration of ADP, although the maximum aggregation (percent) was decreased.Bupranolol and propranolol inhibited the (adrenaline-ADP-)induced aggregation of rabbit platelets, bupranolol being approximately 2.4–3.2 times as effective as propranolol. Bupranolol stimulated the disaggregation of platelet aggregates induced by a combination of adrenaline and ADP, but propranolol did not. Platelet adhesion in rabbit was also inhibited by the β-blockers and bupranolol was more active than propranolol. With human platelets, aggregation induced by adrenaline was inhibited by bupranolol about 2.8–3.3 times as effectively as propranolol.From these findings. We would suggest that bupranolol might be useful for prevention or treatment of thrombosis.

Investigations into the Clinical Utility of Latex D-Dimer in the Diagnosis of Deep Venous Thrombosis

1993 ◽  
Vol 69 (01) ◽  
pp. 008-011 ◽  
Author(s):  
Cedric J Carter ◽  
D Lynn Doyle ◽  
Nigel Dawson ◽  
Shauna Fowler ◽  
Dana V Devine
Keyword(s):  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Lower Limb ◽  
Clinical Utility ◽  
Rapid Test ◽  
Fibrin Degradation Product ◽  
Current Form ◽  
Non Invasive ◽  
Clinically Significant ◽  
D Dimer

SummaryThe serial use of non-invasive tests has been shown to be a safe method of managing outpatients who are suspected of having lower limb deep venous thrombosis (DVT). Objective testing has shown that the majority of these outpatients do not have venous thrombosis. A rapid test to exclude DVT in these patients, without the need for expensive and inconvenient serial non-invasive vascular testing, would have practical and economic advantages.Studies measuring the fibrin degradation product D-dimer using enzyme-linked immunoassays (EIA) in patients with veno-graphically proven DVT suggest that it should be possible to exclude this condition by the use of one of the rapid latex bead D-dimer tests.We have examined 190 patients with suspected DVT using both a latex and an EIA D-dimer assay. The latex D-dimer test used in this study was negative in 7 of the 36 proven cases of DVT. This sensitivity of only 80% is not sufficient to allow this type of assay, in its current form, to be used as an exclusion test for DVT. The same plasma samples were tested with an EIA assay. This information was used to mathematically model the effects of selecting a range of D-dimer discriminant cut off points for the diagnosis of DVT. These results indicate that 62% of suspected clinically significant DVT could have this diagnosis excluded, with a 98% sensitivity, if the rapid latex or equivalent D-dimer test could be reformulated to measure less than 185 ng/ml of D-dimer.

Sign in / Sign up

Export Citation Format

Share Document