Abstract:
INTRODUCTION:Aging and renal impairment may prolong the half-life and lead to accumulation of low molecular weight heparins. Correct dosing is critical to prevent bleeding or thrombosis. MATERIALS AND METHODS:Open, parallel study. Healthy adult [n=13] and elderly (>65yrs) [n=12] volunteers; and subjects with mild (ClCr≥50 to ≤80mL/min, n=8), moderate (ClCr≥30 to <50mL/min, n=7), and severe (ClCr<30mL/min, n=8) renal impairment received four prophylactic doses (3,500IU/24h) and a single therapeutic dose (115IU/kg) of bemiparin with an interim washout period. Anti-FXa activity and the potential need for dose adjustment were evaluated. RESULTS:There were statistically significant differences in the severe renal impairment group vs. adult volunteers in all anti-FXa related parameters, but no significant differences in any of the anti-FXa related parameters between the adult and the elderly. Anti-FXa simulations after 10 prophylactic doses predicted mean Amax=0.59IU/mL in subjects with severe renal impairment and 0.33-0.39IU/mL in the rest. Simulations in the severe renal impairment group with dose adjustment (2,500IU/24h) predicted all individual Amax<0.60IU/mL (mean Amax=0.42IU/ml). Simulations after 10 therapeutic doses predicted mean Amax=1.22IU/mL in severe renal impairment group and 0.89-0.98IU/mL in the rest. Simulations in the severe renal impairment group with 75% dose adjustment predicted individual Amax≤1.60IU/mL (mean Amax=0.91IU/mL). CONCLUSIONS:No dose adjustments are required in elderly with preserved renal function. A dose adjustment of bemiparin is only advisable in patients with severe renal impairment when using prophylactic or therapeutic doses.
journal_name
Thromb Resjournal_title
Thrombosis researchauthors
Rico S,Antonijoan RM,Ballester MR,Gutierro I,Ayani I,Martinez-Gonzalez J,Borrell M,Fontcuberta J,Gich Idoi
10.1016/j.thromres.2014.03.038subject
Has Abstractpub_date
2014-06-01 00:00:00pages
1029-38issue
6eissn
0049-3848issn
1879-2472pii
S0049-3848(14)00168-6journal_volume
133pub_type
杂志文章,多中心研究abstract:INTRODUCTION:There is an exponential rise of thromboembolic risk with age because of co-morbidities, immobility and pharmacotherapy. We aimed to investigate the benefits and risks of heparin prophylaxis in very elderly patients ≥80 years and the type of heparin used in a subgroup analysis of the CERTIFY trial. PATIENT...
journal_title:Thrombosis research
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.thromres.2011.05.002
更新日期:2011-11-01 00:00:00
abstract:PURPOSE:Due to its specific pharmacokinetic profile, tinzaparin, a low-molecular-weight heparin (LMWH), appears not to be associated with anti-factor Xa accumulation. Our meta-analysis aimed at determining whether long-term curative doses of tinzaparin is a valuable alternative to vitamin K antagonists (VKA) for the tr...
journal_title:Thrombosis research
pub_type: 杂志文章,meta分析
doi:10.1016/j.thromres.2012.08.290
更新日期:2012-12-01 00:00:00
abstract::Understanding the intracellular events triggered by antiphospholipid (aPL) antibodies in platelets and endothelial cells (ECs) is important in designing new modalities of targeted therapies for the treatment of thrombosis in Antiphospholipid Syndrome (APS). A recent study showed a significant increase in the expressio...
journal_title:Thrombosis research
pub_type: 杂志文章,评审
doi:10.1016/j.thromres.2004.06.031
更新日期:2004-01-01 00:00:00
abstract::Heparin is known to exert its antithrombotic effects by accelerating the effect of antithrombin (AT) and by mobilizing tissue factor pathway inhibitor (TFPI) into the circulation from vascular endothelium. Heparin treatment has been reported to decrease FVIIa activity by 40%; this was suggested as a new antithrombotic...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/s0049-3848(00)00343-1
更新日期:2000-12-01 00:00:00
abstract:INTRODUCTION:Unicompartmental knee arthroplasty (UKA) has increased due to potential favourable complication rates when compared to total knee arthroplasty (TKA). Although venous thromboembolism (VTE) is a well-documented complication after TKA limited data is available after UKA and mostly presented as secondary findi...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2020.07.002
更新日期:2020-11-01 00:00:00
abstract:INTRODUCTION:Whether clinical prediction rules for pulmonary embolism are accepted and used among general internal medicine residents remains uncertain. We therefore evaluated the frequency of use and acceptability of the Revised Geneva Score (RGS) and the Pulmonary Embolism Severity Index (PESI), and explored which fa...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2017.09.028
更新日期:2017-12-01 00:00:00
abstract::In order to choose the proper method for evaluating the antithrombin activity in samples of chitosan polysulphate (CP) with different polymerization degrees and sulphation degrees, we estimated the ability of direct anticoagulants to depress the coagulability of recalcified sheep blood using the third international he...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/s0049-3848(01)00266-3
更新日期:2001-06-01 00:00:00
abstract::Analogs of the antithrombin peptide hirudin54-65 with C-terminal modifications have been synthesized in order to examine the requirements for alpha-thrombin inhibition. The C-terminal residue, Gln65, could be replaced with L-amino acids or amino alcohols with neutral or charged hydrophilic side chains without greatly ...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(89)90090-x
更新日期:1989-05-15 00:00:00
abstract::Red blood cells have historically been viewed as innocent bystanders in the process of blood coagulation and thrombin generation; however a century of clinical evidence linking red blood cells to thrombosis suggests the contrary. In this brief review, the biochemical evidence for red blood cell involvement in thrombin...
journal_title:Thrombosis research
pub_type: 杂志文章,评审
doi:10.1016/j.thromres.2013.01.023
更新日期:2013-05-01 00:00:00
abstract::The role of thrombin in vascular physiology and pathophysiology continues to impact our understanding of many cellular processes and systems including the function of platelets, endothelial cells, smooth muscle cells, leukocytes and the regulation of the coagulation cascade. Recent acute coronary syndrome clinical tri...
journal_title:Thrombosis research
pub_type: 杂志文章,评审
doi:10.1016/j.thromres.2015.02.013
更新日期:2015-05-01 00:00:00
abstract::An extensive study of the pharmacokinetics and the pharmacokinetics of the profibrinolytic activity of Defibrotide (D) in the rabbit has been made. a two compartment model was used to describe D's pharmacokinetics. The parameters of drug disposition and the rate constant of release from tissues to central compartment ...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(83)90391-2
更新日期:1983-04-01 00:00:00
abstract:INTRODUCTION:Warfarin is the most widely used oral anticoagulant. It has been suggested that anticoagulation effect of warfarin is significantly associated with the polymorphism of certain genes, including Cytochrome P450 complex subunit 2C9 (CYP2C9), Vitamin K Epoxide Reductase Complex Subunit 1 (VKORC1), Gamma-Glutam...
journal_title:Thrombosis research
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.thromres.2009.10.017
更新日期:2010-04-01 00:00:00
abstract:INTRODUCTION:Profuse postpartum hemorrhage (PPH) and red blood cell (RBC) transfusion have been suggested to be associated with venous thromboembolic events (VTE). However, it is not fully clear if they are independent major risk factors. METHODS:Women who gave birth in the Stockholm area between 1999 and 2002 were th...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2018.03.002
更新日期:2018-05-01 00:00:00
abstract:INTRODUCTION:Plasma viscosity (PV) constitutes an independent important predictor of initial and recurrent cardiac events and mortality. It has been suggested that there is a geographical variation in PV values related to coronary event rates. Little information exists regarding PV in Spain. Therefore, our objective wa...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2006.11.009
更新日期:2007-01-01 00:00:00
abstract::Antiphospholipid antibodies (APAs) are considered risk factors in patients with thromboembolic diseases. Although the incidence of such acquired coagulation disturbances in adults are well described, only few data exist for children. Therefore, in a first step to collect new data we analyzed the presence of different ...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/s0049-3848(99)00241-8
更新日期:2000-05-15 00:00:00
abstract::Human platelets contain a single membrane glycoprotein which is susceptible to thrombin proteolysis, glycoprotein V. We have purified 1 mg of glycoprotein V from 10(13) platelets using a combination of gel filtration, hydroxylapatite and ion-exchange chromatographies. Glycoprotein V has a blocked amino-terminus. Follo...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(89)90113-8
更新日期:1989-01-01 00:00:00
abstract:BACKGROUND:Integrin αIIbβ3 mediates platelet adhesion, aggregation and fibrin clot retraction. These processes require activation of αIIbβ3 and post-ligation signaling. Disulfide bond exchanges are involved in αIIbβ3 and αvβ3 activation. METHODS:In order to investigate the role of integrin activation and disulfide bon...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2014.02.001
更新日期:2014-05-01 00:00:00
abstract::Venous thromboembolism remains an important cause of maternal mortality. For women at risk during pregnancy, the recommended venous thromboembolismprophylaxis is unfractionated heparin. Low molecular weight heparins, such as dalteparin, also may be suitable, but randomised trials have not been performed. Pregnant wome...
journal_title:Thrombosis research
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1016/s0049-3848(99)00110-3
更新日期:1999-11-15 00:00:00
abstract:BACKGROUND:Impaired endothelial-dependent flow-mediated dilatation (FMD) has been used to demonstrate endothelial dysfunction in a wide variety of cardiovascular disease, but previous studies have excluded patients with atrial fibrillation(AF). We therefore hypothesised that endothelial dysfunction exists in AF and tha...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2007.09.008
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:Coronary collateral circulation (CCC) plays an important role in protecting myocardium from ischemic damage. The studies on factors which impact on CCC might be of great clinical interest. The aim of the present study was to evaluate endothelin-1 (ET-1) as a potential predictor for poor or good CCC in patien...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2016.04.007
更新日期:2016-06-01 00:00:00
abstract::Three collagenases were purified from the culture medium of human skin fibroblasts using ammonium sulfate fractionation, ion-exchange chromatography and gel filtration. The cationic collagenase had a molecular weight of 42,000; two anionic collagenases had molecular weights of 63,000 and 115,000. Preincubation of the ...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(84)90211-1
更新日期:1984-07-15 00:00:00
abstract::Separation of plasma, erythrocytes, and platelets was studied in T-shaped bifurcations prepared by a casting technique. The diameters of the side and main channel were 100 microns and 200 microns, respectively. Small blood samples (about 20 microliters) were collected from the side channel for determination of erythro...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(87)90314-8
更新日期:1987-03-01 00:00:00
abstract::A new type of assay for heparins has been devised, in which the test material competes with 125I-labelled heparin for binding to protamine-Sepharose. The assay is very sensitive and will measure heparin concentrations down to 10 ng ml-1. It responds to both the degree of sulphation and the molecular weight of acidic p...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(82)90056-1
更新日期:1982-08-15 00:00:00
abstract::The levels of protein C (PC) and other coagulation factors were monitored during endotoxin-induced disseminated intravascular coagulation (DIC) in the dog. Initial evaluation of the effectiveness of intradermal administration of bolus endotoxin quantities into the dog, demonstrated induction of DIC in the canine, with...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(89)90062-5
更新日期:1989-08-01 00:00:00
abstract:BACKGROUND:Few studies investigated the relationship between fibrinolysis abnormalities and residual pulmonary perfusion defects after acute pulmonary embolism (PE). OBJECTIVE:To assess the fibrinolytic profile in patients with prior PE in relation to the extent of scintigraphically detectable residual perfusion abnor...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/j.thromres.2014.07.013
更新日期:2014-09-01 00:00:00
abstract::Cell based models of coagulation (CBM) have provided mechanistic insight into numerous hematological issues for nearly two decades. This review discusses another coagulation model system--the clot lifespan model (CLSM)--that has been designed to compliment the CBM-based approach to elucidating the mechanisms responsib...
journal_title:Thrombosis research
pub_type: 杂志文章,评审
doi:10.1016/j.thromres.2007.09.003
更新日期:2008-01-01 00:00:00
abstract::We have investigated fibrinolytic parameters in 33 patients with peripheral arterial occlusive disease (PAOD) before and 6, 24, and 48 hours after percutaneous transluminal angioplasty (PTA) as well as in 35 gender-matched healthy controls, whose mean age was not significantly different from the mean age of the patien...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/s0049-3848(99)00002-x
更新日期:1999-05-15 00:00:00
abstract::This study investigates the effect on human platelet function of two sesquiterpene lactones from Arnica montana L., helenalin (H) and 11 alpha,13-dihydrohelenalin (DH). Both compounds inhibited collagen-induced platelet aggregation, thromboxane formation and 5-hydroxytryptamine secretion in a concentration-dependent m...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(90)90151-2
更新日期:1990-03-15 00:00:00
abstract::We have previously described a stimulus-specific defect in platelet aggregation in polycythaemia vera (PV) after stimulation with surface receptor dependent agonists such as platelet activating factor (PAF). In contrast, responses to phorbol myristate acetate (PMA) were normal. We now report that after PAF stimulation...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/s0049-3848(98)00096-6
更新日期:1998-09-15 00:00:00
abstract::Bovine myelin basic protein (BP) induced a shape change and endogenous phosphorylation of a 45,000 (45K) molecular weight protein of intact human platelets. This effect occurred rapidly over an effective concentration range of 5-100 microM BP. BP peptides encompassing residues 1-42, 43-88, and 89-169 from the BP molec...
journal_title:Thrombosis research
pub_type: 杂志文章
doi:10.1016/0049-3848(82)90090-1
更新日期:1982-03-15 00:00:00