The mechanism of high affinity pentasaccharide binding to antithrombin, insights from Gaussian accelerated molecular dynamics simulations

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Inherited thrombophilia and the risk of myocardial infarction: current evidence and uncertainties

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Inherited thrombophilia and the risk of myocardial infarction: current evidence and uncertainties

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Platelet count and mean volume in acute stroke: a systematic review and meta-analysis

Changes of mean platelet volume (MPV) and platelet count (PC) could be a marker or a predictor of acute stroke (AS). We conducted a systematic review and meta-analysis of the published literature on the reporting of MPV and PC in AS. Studies were included in accordance with Patient Population or Problem, Intervention, Comparison, Outcomes, and Setting framework. The PRISMA strategy was used to report findings. Risk of bias was assessed with the Newcastle-Ottawa Scale. We included 34 eligible articles retrieved from the literature. PC was significantly lower in AS patients [standardized mean difference (SMD) = - 0.30, (95% CI: - 0.49 to - 0.11), N = 2492, P = .002] compared with controls (N = 3615). The MPV was significantly higher [SMD = 0.52 (95% CI: 0.28-0.76), N = 2739, P < .001] compared with controls (N = 3810). Subgroup analyses showed significantly lower PC in both ischemic stroke (Difference SMD = -0.18, 95% CI: -0.35-0.01) and hemorrhagic stroke (-0.94, -1.62 to -0.25), but only samples by citrate anticoagulant showed significantly lower result for patients compared to controls (-0.36, -0.68 to -0.04). Ischemic stroke patients had higher MPV (0.57, 0.31-0.83), and samples by Ethylenediaminetetraacetic acid (EDTA) anticoagulant showed significantly higher result for patients compared to controls (0.86, 0.55-1.17). PC and MPV appeared to be significantly different between patients with AS and control populations. MPV was significantly higher in ischemic stroke and PC was significantly lower in both ischemic and hemorrhagic strokes. These characteristics might be related to AS and associated with it. It is advisable to pay attention to elapsed time between phlebotomy and hematology analysis, anticoagulant and hemocytometer types in AS. Systematic review registration: This meta-analysis is registered on the International Prospective Register of Systematic Reviews (PROSPERO) under registration number CRD42017067864 (https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=67864)

Az új orális antikoagulánsokkal történő kezelés laboratóriumi vonatkozásai | Laboratory aspects of novel oral anticoagulant treatment

Absztrakt: Az évtizedek óta várt új orális antikoagulánsok (NOAC) egyre bővülő körben alkalmazott gyógyszerekké váltak a terápiában, hiszen az orális antikoagulánsként korábban egyedüliként alkalmazott kumarinszármazékokhoz képest számos klinikai indikációban a kumarinokkal azonos vagy annál jobb klinikai hatékonyságot mutatnak. Ennek következtében a direkt trombininhibitor dabigatran, majd a direkt X-es alvadási faktort gátló szerek (rivaroxaban, apixaban, edoxaban) az elmúlt években a napi terápiás gyakorlat részévé váltak. Elterjedésüket nem kis részben segítette azon ajánlás, hogy nem igényelnek laboratóriumi monitorizálást, ami mind a beteg, mind a kezelőorvos számára rendkívül nagy előnyt jelent. Az elmúlt évek tapasztalatai azonban bebizonyították, hogy a ‘one size fits all’ szemlélet erősen szimplifikált a NOAC-terápia során, és számos olyan eset van, amikor ezen gyógyszerek koncentrációjának monitorizálása elkerülhetetlen vagy erősen ajánlott. Ez az összefoglaló tanulmány a NOAC-kezelés laboratóriumi vonzatait tárgyalja, kiemelten a hemosztázis alap- és speciális tesztjeire való hatásukat, valamint a korrekt NOAC-koncentráció meghatározására szolgáló laboratóriumi módszereket. Orv Hetil. 2017; 158(49): 1930–1945. | Abstract: The introduction of novel oral anticoagulants (NOAC) have long been expected drugs and they quickly became used widespread as their clinical effectiveness was as good as, or even better than the previously used only oral anticoagulant drug, the coumarins. Thus, the direct thrombin inhibitor dabigatran and the activated factor X inhibitors (rivaroxaban, apixaban, edoxaban) have become the part of daily therapeutic practice. Their permeation was facilitated by the guideline which suggested that no laboratory monitoring was required during NOAC treatment and this was very convenient for both patients and doctors. The clinical experience obtained in the past years, however have proved that the ‘one size fits all’ view is oversimplified and there are numerous situations when the determination NOAC levels is unavoidable or highly recommended. This review discusses the laboratory aspects of NOAC treatment, primarily summarizing their effect on the screening tests and special assays of hemostasis and we also describe the correct methods to determine their plasma concentrations. Orv Hetil. 2017; 158(49): 1930–1945

Platelet count and mean volume in acute stroke: a systematic review and meta-analysis

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Management and outcome of pregnancies in women with antithrombin deficiency: a single-center experience and review of literature

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