Related Experiment Video
Updated: Nov 20, 2025
Prehospital Thrombolysis: A Manual from Berlin
Published on: November 26, 2013
Prophylactic anticoagulation for preterm premature rupture of membranes: a decision analysis
Cassandra B Iroz1, Carly M Dahl2, Irina R Cassimatis2
1Feinberg School of Medicine, Northwestern University, Chicago, IL.
Insights
For women hospitalized with preterm premature rupture of membranes, routine prophylactic anticoagulation is not recommended. Decision analysis suggests that avoiding anticoagulation maximizes maternal well-being and minimizes risks.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Thrombosis Research
Background:
- Hospitalization for preterm premature rupture of membranes increases venous thromboembolism (VTE) risk due to reduced activity.
- Prophylactic anticoagulation is considered but carries risks like precluding neuraxial analgesia or increasing postpartum hemorrhage.
Purpose of the Study:
- To determine the optimal VTE prophylaxis strategy for hospitalized patients with preterm premature rupture of membranes.
- Utilize a decision analysis model to compare anticoagulation options.
Main Methods:
- A decision-analytical Markov model was developed comparing unfractionated heparin, low-molecular-weight heparin, and no anticoagulation.
- Model evaluated maternal outcomes including VTE, postpartum hemorrhage, and analgesia/anesthesia.
- Probabilities and utilities were sourced from existing literature; sensitivity analyses were performed.
Main Results:
- The decision model indicated that no prophylactic anticoagulation maximized maternal utilities.
- Sensitivity analyses supported the conclusion that avoiding anticoagulation is preferred.
- Monte Carlo simulations showed no prophylaxis as the preferred choice in 56% of cases.
Conclusions:
- Routine prophylactic anticoagulation is not supported for women hospitalized with preterm premature rupture of membranes.
- Findings can guide clinical decisions for low-risk singleton pregnancies in this setting.
Background:
The current standard of care in the setting of preterm premature rupture of membranes involves antenatal hospitalization until delivery. The reduced physical activity during this time compounds the heightened risk for venous thromboembolism in pregnancy. Prophylactic anticoagulation can decrease this risk of venous thromboembolism; however, this benefit must be balanced against the risks of precluding neuraxial analgesia or increasing the risk of postpartum hemorrhage.
Objective:
The objective of this study was to determine the optimal modality for venous thromboembolism prophylaxis during hospitalization for preterm premature rupture of membranes using a decision analysis model.
Study Design:
A decision-analytical Markov model was constructed using the TreeAge software comparing the use of unfractionated heparin, low-molecular-weight heparin or no anticoagulation in women with a singleton pregnancy who were hospitalized for preterm premature rupture of membranes after 24 weeks and remained hospitalized until delivery. Maternal outcomes examined included attainment of neuraxial analgesia (vs no analgesia for vaginal delivery or general anesthesia for cesarean delivery), venous thromboembolism, postpartum hemorrhage, and maternal death. Probabilities and utilities were derived from existing literature. Sensitivity analyses were performed to interrogate model assumptions, and a Monte Carlo probabilistic sensitivity analysis was performed to examine the robustness of the model.
Results:
In this decision-analytical model, no prophylactic anticoagulation maximized maternal utilities. Clinical outcomes among a theoretical cohort of 100,000 women are shown in the Table. The 1- and 2-way sensitivity analyses supported this conclusion. Monte Carlo probabilistic sensitivity analysis indicated that no prophylaxis was the preferred choice in 56% of simulations, unfractionated heparin in 34% of simulations, and low-molecular-weight heparin in 10% of simulations.
Conclusion:
Our results do not support the routine use of prophylactic anticoagulation in women admitted to the hospital for preterm premature rupture of membranes. These findings can be used to inform clinical decisions when admitting low-risk singleton pregnancies to the hospital in the setting of preterm premature rupture of membranes.
Related Concept Videos
01:29Venous Thrombosis III: Interprofessional Care
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
01:29Pulmonary Embolism II: Diagnostic Studies and Interprofessional Care
01:18Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
01:22Aneurysm IV: Nursing Management