Optimal enoxaparin dosing strategies for venous thromboembolism prophylaxis and treatment of high body weight patients

Author(s):  
Annalise M. Martin ◽  
Paola Polistena ◽  
Asma Mahamud ◽  
Brett Bettridge ◽  
Alan Morling ◽  
...  
2018 ◽  
Vol 52 (9) ◽  
pp. 898-909 ◽  
Author(s):  
Jamie Sebaaly ◽  
Kelly Covert

Objective: To review the literature on both thromboprophylaxis and treatment of venous thromboembolism (VTE) with enoxaparin in low- and high-body-weight patients and to make dosing and monitoring recommendations in these patient populations. Data Sources: A search using PubMed was conducted (1995 to January 2018) using the following key words: enoxaparin, body weight, AND thromboprophylaxis, or AND treatment. Additional references were identified from a review of citations. Study Selection and Data Extraction: Studies included examined the effect of body weight and/or body mass index (BMI) on VTE, bleeding, enoxaparin dosing, and/or anti-Xa concentrations for thromboprophylaxis and treatment-dose enoxaparin. Studies in pediatric and pregnant patients were excluded. Data Synthesis: Optimal enoxaparin dosing strategies for VTE prophylaxis and treatment for patients at extremes of weight have not yet been elucidated by clinical trials; however, data suggest that standard dosing regimens may not be appropriate in these patients. Relevance to Patient Care and Clinical Practice: This review provides a thorough discussion on both thromboprophylaxis and treatment of VTE with enoxaparin in low- and high-body-weight patients. It includes dosing recommendations to guide clinicians caring for these patient populations. Conclusions: Patients at extremes of weight require special consideration to determine appropriate enoxaparin doses. Specifically, low-body-weight patients may benefit from 30 mg subcutaneously daily for VTE prophylaxis, and standard weight-based dosing for VTE treatment. Conversely, in patients with BMIs ≥40 kg/m2, 40 mg subcutaneously twice daily is recommended, with consideration for higher doses in patients with BMIs ≥50 kg/m2.


2019 ◽  
Vol 54 (4) ◽  
pp. 344-350 ◽  
Author(s):  
Isaac J. Perales ◽  
Kimberly San Agustin ◽  
Jessica DeAngelo ◽  
Ashley M. Campbell

Background: Limited clinical data exist describing the use of direct-acting oral anticoagulants (DOACs) in patients with body mass index (BMI) >40 kg/m2 or body weight >120 kg. Thus, DOAC therapy in this population remains controversial. Objectives: To investigate rivaroxaban as a safe and effective alternative to warfarin for venous thromboembolism (VTE) treatment and prevention of stroke in patients with atrial fibrillation identified as extremely obese or of high body weight. Methods: A retrospective chart review was performed at 2 academic medical centers in patients ≥18 years old and BMI >40 kg/m2 or weight >120 kg, newly initiated on warfarin or rivaroxaban for atrial fibrillation or VTE treatment. The primary end point was incidence of clinical failure, defined as VTE recurrence, stroke incidence, and mortality, within 12 months of initiation. Secondary end points included length of stay (LOS) and bleeding complications. Results: A total of 176 patients were included, with 84 and 92 patients in the rivaroxaban and warfarin arms, respectively. Clinical failure was lower in the rivaroxaban group but did not reach statistical significance when compared with warfarin (5% vs 13%; P = 0.06). LOS was significantly shorter in the rivaroxaban arm (2 days [1-3] vs 4 days [2-7], P < 0.0001). Percentage of bleeding complications was higher in the rivaroxaban arm but not statistically significant (8% vs 2%, P = 0.06). Conclusion and Relevance: Although not statistically significant, rivaroxaban trended toward a lower incidence of clinical failure while demonstrating a significantly shorter LOS when compared with warfarin for VTE treatment or atrial fibrillation in morbidly obese or high-body-weight patients.


Author(s):  
Alexander T. Cohen ◽  
Sharon Pan ◽  
Wonkyung Byon ◽  
Bushra S. Ilyas ◽  
Thomas Taylor ◽  
...  

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