scholarly journals Evaluation of an Optimal Dose of Low-Molecular-Weight Heparin for Thromboprophylaxis in Pregnant Women at Risk of Thrombosis Using Coagulation Activation Markers

2001 ◽  
Vol 31 (2) ◽  
pp. 90-98 ◽  
Author(s):  
T. Bombeli ◽  
P. Raddatz Mueller ◽  
J. Fehr
Keyword(s):  
At Risk ◽  
Molecular Weight ◽  
Pregnant Women ◽  
Low Molecular Weight Heparin ◽  
Optimal Dose ◽  
Low Molecular Weight ◽  
Coagulation Activation ◽  
Activation Markers

Prospective evaluation of coagulation activation in pregnant women receiving low-molecular weight heparin

2004 ◽  
Vol 91 (05) ◽  
pp. 935-940 ◽  
Author(s):  
Matthias Hoke ◽  
Paul Kyrle ◽  
Karl Philipp ◽  
Ingrid Pabinger ◽  
Alexandra Kaider ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Pregnant Women ◽  
Low Molecular Weight Heparin ◽  
Activated Protein C ◽  
Normal Pregnancy ◽  
Coagulation System ◽  
Control Group ◽  
Low Molecular Weight ◽  
Coagulation Activation ◽  
D Dimer

SummaryPregnancy is a major risk factor for venous thromboembolism (VTE), and low-molecular weight heparin (LMWH) seems to be safe and effective in pregnant women. Normal pregnancy is accompanied by a state of hypercoagulability, indicated by an increase in markers of coagulation activation. In a prospective cohort study, we followed 61 women who received LMWH thromboprophylaxis throughout pregnancy because of a history of VTE, hereditary thrombophilia and/or previous pregnancyrelated complications. The control group consisted of 113 healthy pregnant women without antithrombotics. D-Dimer, prothrombin fragment F1+2 (F1+2) and the resistance to activated protein C (APC-ratio) were measured in all women during the first, second and third trimester. Patients and controls did not significantly differ with regard to baseline characteristics and pregnancy outcome. A (recurrent)VTE was seen in one patient despite LMWH. D-Dimer levels significantly increased among patients and controls during pregnancy (p <0.0001), and were significantly higher among patients compared with the controls (p <0.0001) [395 ng/ml (95% CI 340-458) and 249 ng/ml (95%CI 234-266); 710 ng/ml (95% CI 602-838) and 475 ng/ml (95% CI 431-523); 1089 ng/ml (95% CI 931-1273) and 822 ng/ml (95% CI 741-911); respectively]. Levels of F1+2 significantly increased while the APC-ratio significantly decreased during pregnancy among patients and controls. Despite LMWH, pregnancy is accompanied by a substantial activation of the coagulation system.

Thrombocytopenia in pregnant women with thrombophilia treated with low-molecular-weight heparin

2019 ◽  
Vol 1 (67) ◽  
pp. 30
Author(s):  
Melinda-Ildiko Mitranovici ◽  
Smaranda Ilea ◽  
Mihai Morariu ◽  
Daniel Mureşan ◽  
Izabella Petre
Keyword(s):  
Molecular Weight ◽  
Pregnant Women ◽  
Low Molecular Weight Heparin ◽  
Low Molecular Weight

Thrombin generation and low-molecular-weight heparin prophylaxis in pregnant women with thrombophilia

2015 ◽  
Vol 113 (02) ◽  
pp. 283-289 ◽  
Author(s):  
Anna Selmeczi ◽  
Rachel E. J. Roach ◽  
Csaba Móré ◽  
Zoltán Batta ◽  
Jolán Hársfalvi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Pregnant Women ◽  
Low Molecular Weight Heparin ◽  
Thrombin Generation ◽  
Factor Xa ◽  
Peak Effect ◽  
Low Molecular Weight ◽  
Endogenous Thrombin Potential ◽  
Increased Risk ◽  
Optimal Approach

SummaryPregnancy is associated with increased risk of venous thromboembolism, especially in the presence of thrombophilia. However, there is no consensus on the optimal approach for thromboprophylaxis in this population. Recent evidence suggests that thrombin generation correlates with the overall procoagulant state of the plasma. Our aim was to evaluate thrombin generation in a prospective cohort of thrombophilic pregnant women, and investigate the effectiveness of low-molecular- weight heparin (LMWH) prophylaxis in pregnancy. Women with severe (n=8), mild (n=47) and no (n=15) thrombophilia were followed throughout their pregnancies. Thrombin generation was evaluated in each trimester as well as five days and eight weeks postpartum (as a reference category). In women undergoing LMWH prophylaxis, thrombin generation and anti-Factor-Xa activity were measured just before and 4 hours after administration (peak effect). Thrombin generation was determined using Technothrombin TGA assay system. For the analysis, median peak thrombin and endogenous thrombin potential were used. Peak thrombin and endogenous thrombin potential were increased during pregnancy compared to the non-pregnant state with the highest results in the severe thrombophilia group. In women receiving LMWH prophylaxis a decrease was observed in thrombin generation at peak effect but over the progression of pregnancy the extent of this decrease reduced in a stepwise fashion. Our results show that thrombin generation demonstrates the hypercoagulable state in thrombophilic pregnancies. In addition, we found the effect of LMWH prophylaxis to progressively decrease with advancing stages of pregnancy.

Anti-factor Xa Plasma Levels in Pregnant Women Receiving Low Molecular Weight Heparin Thromboprophylaxis

2008 ◽  
Vol 112 (4) ◽  
pp. 884-889 ◽  
Author(s):  
Nathan S. Fox ◽  
S Katherine Laughon ◽  
Samuel D. Bender ◽  
Daniel H. Saltzman ◽  
Andrei Rebarber
Keyword(s):  
Molecular Weight ◽  
Pregnant Women ◽  
Plasma Levels ◽  
Low Molecular Weight Heparin ◽  
Factor Xa ◽  
Low Molecular Weight

The Relationship between Use of Low Molecular Weight Heparin during Pregnancy and Risk of Peripartum Adverse Events: A Meta-Analysis

2021 ◽  
Vol 8 (11) ◽  
Author(s):  
Xiaorong Y ◽  
◽  
Shan L ◽  
Shengji S ◽  
Tao S ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Adverse Events ◽  
Pregnant Women ◽  
Low Molecular Weight Heparin ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Premature Delivery ◽  
Low Molecular Weight ◽  
Significant Difference ◽  
Fetal Complications

Introduction: To summarize the trials investigated on relationship between low molecular weight heparin use during pregnancy and peripartum adverse events. Meta-analysis was performed to evaluate the effect of Low Molecular Weight Heparin (LMWH) on maternal and fetal complications. Methods: Electronic research was performed in Cochrane Library, MEDLINE and EMBASE through October 2020. The primary outcome was the incidence of maternal and fetal complications during peripartum period. RevMan 5.3 was used for data analysis. Results: 11 articles were finally included. Meta-analysis showed there was no significant difference in abortion, premature delivery, stillbirth, preeclampsia and postpartum hemorrhage events between pregnant women who used LMWH and those who not. Conclusion: Using LMWH in pregnant women does not increase pregnancy related maternal and fetal complications.

The effects of low-molecular-weight heparin at two different dosages on thrombin generation in cancer patients.

2010 ◽  
Vol 104 (07) ◽  
pp. 92-99 ◽  
Author(s):  
Ludwig Traby ◽  
Alexandra Kaider ◽  
Rainer Schmid ◽  
Alexander Kranz ◽  
Peter Quehenberger ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Cancer Patients ◽  
Low Molecular Weight Heparin ◽  
Thrombin Generation ◽  
Low Molecular Weight ◽  
Prothrombotic State ◽  
Coagulation Activation ◽  
Thrombotic Risk ◽  
Baseline Levels ◽  
D Dimer

SummaryNon-surgical cancer patients are at high thrombotic risk. We hypothesised that the prothrombotic state is reflected by elevated thrombin generation and can be mitigated by increasing the low-molecularweight heparin (LMWH) dose. Non-surgical cancer patients were randomised to enoxaparin 40 or 80 mg. D-dimer, prothrombin fragment F1+2 (F1+2) and peak thrombin (PT) were measured 2, 4, 6 hours (h) after LMWH (day 1) and daily for 4 days. A total of 22 and 27 patients received enoxaparin 40 and 80 mg, respectively. D-dimer and F1+2 moderately decreased after 6 h in both groups. After enoxaparin 80 mg, D-dimer baseline levels [median (quartiles)] decreased from day 1 to 4 [1054.9 (549.5, 2714.0) vs. 613.0 (441.1, 1793.5) ng/ml] (p<0.0001), while no difference was seen after 40 mg. Baseline PT levels [median (quartiles)] were 426.2 nM (347.3, 542.3) (40 mg) and 394.0 nM (357.1, 448.8) (80 mg). After 80 mg, PT significantly decreased to 112.4 nM (68.5, 202.4), 57.1 nM (38.0, 101.2) and 43.6 nM (23.4, 112.8) after 2, 4 and 6 h, which was lower than after 40 mg (p=0.003). After 80 mg, PT decreased from day 1 to 4 [358.6 nM (194.2, 436.6); p=0.06] while no difference was seen after 40 mg. In conclusion, in cancer patients coagulation activation and thrombin generation is substantially increased. Peak thrombin levels are sensitive to the anticoagulant effects of LMWH at different dosages. The prothrombotic state is substantially attenuated by higher LMWH doses.

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