Browsing by Subject "Anticoagulant"

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    Incidence of Venous Thromboembolism in Critically Ill Coronavirus Disease 2019 Patients Receiving Prophylactic Anticoagulation
    (Wolters Kluwer, 2020-06-30) Trigonis, Russell A.; Holt, Daniel B.; Yuan, Rebecca; Siddiqui, Asma A.; Craft, Mitchell K.; Khan, Babar A.; Kapoor, Rajat; Rahman, Omar; Medicine, School of Medicine
    Objectives: One of the defining features of the novel coronavirus disease 2019 infection has been high rates of venous thromboses. The present study aimed to describe the prevalence of venous thromboembolism in critically ill patients receiving different regimens of prophylactic anticoagulation. Design: Single-center retrospective review using data from patients with confirmed severe acute respiratory syndrome coronavirus 2 requiring intubation. Setting: Tertiary-care center in Indianapolis, IN, United States. Patients: Patients hospitalized at international units Health Methodist Hospital with severe acute respiratory syndrome coronavirus 2 requiring intubation between March 23, 2020, and April 8, 2020, who underwent ultrasound evaluation for venous thrombosis. Interventions: None. Measurements and Main Results: A total of 45 patients were included. Nineteen of 45 patients (42.2%) were found to have deep venous thrombosis. Patients found to have deep venous thrombosis had no difference in time to intubation (p = 0.97) but underwent ultrasound earlier in their hospital course (p = 0.02). Sequential Organ Failure Assessment scores were similar between the groups on day of intubation and day of ultrasound (p = 0.44 and p = 0.07, respectively). d-dimers were markedly higher in patients with deep venous thrombosis, both for maximum value and value on day of ultrasound (p < 0.01 for both). Choice of prophylactic regimen was not related to presence of deep venous thrombosis (p = 0.35). Ultrasound evaluation is recommended if d-dimer is greater than 2,000 ng/mL (sensitivity 95%, specificity 46%) and empiric anticoagulation considered if d-dimer is greater than 5,500 ng/mL (sensitivity 53%, specificity 88%). Conclusions: Deep venous thrombosis is very common in critically ill patients with coronavirus disease 2019. There was no difference in incidence of deep venous thrombosis among different pharmacologic prophylaxis regimens, although our analysis is limited by small sample size. d-dimer values are elevated in the majority of these patients, but there may be thresholds at which screening ultrasound or even empiric systemic anticoagulation is indicated.
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    Prophylactic Enoxaparin Dosing and Anti-Xa Levels in Medicine Patients With Obesity
    (Sage, 2025-03-29) Phyo, Wint War; Deodhar, Karishma; Chang, Amy; Blair, Mary; Boyd, Allison N.; Geik, Christopher; Medicine, School of Medicine
    Introduction: Previous studies have shown that the manufacturer's standard fixed dosing of enoxaparin for venous thromboembolism (VTE) prophylaxis leads to sub-prophylactic anti-Xa levels in medicine patients with obesity. Yet, there is limited literature describing higher dosing strategies in this patient population, and an optimal dosing regimen has not been well-established. Objective: The primary objective was to evaluate mean doses (mg/kg/d) of prophylactic enoxaparin that are associated with goal anti-Xa levels in medicine patients with obesity across 3 body mass index (BMI) groups (40-49 kg/m2, 50-59 kg/m2, ≥60 kg/m2). Methods: This is a single-center, retrospective cohort study of adult patients (age ≥18 years) with BMI ≥40 kg/m2 admitted to a medicine team with at least 1 appropriately drawn anti-Xa level between January 2018 and July 2023. The institution's goal anti-Xa level for VTE prophylaxis was 0.2 to 0.4 units/mL. The primary outcome was the comparison of mean dose between those within anti-Xa at goal and not at goal. Secondary outcomes included the percentages of initial anti-Xa levels below, within, or above goal range and the incidence of new VTE and major bleeding events during hospitalization while on enoxaparin. All outcomes were stratified into 3 BMI groups: 40-49 kg/m2, 50-59 kg/m2, and ≥60 kg/m2. Results: Median dose of those with final anti-Xa level at goal was significantly higher than that of those not in goal anti-Xa range across all 3 BMI groups (0.57 vs 0.50 mg/kg/d; P < 0.05). The majority of the initial anti-Xa levels were subprophylactic, with only 35.7% of patients (or 75 of 210 patients) had initial anti-Xa within the goal range. There were no statistically significant differences in the number of blood transfusions or VTE events between the groups. Conclusion: Findings suggest that medicine patients with BMI ≥40 kg/m2 may require enoxaparin doses higher than 0.5 mg/kg/d to reach goal prophylactic anti-Xa level. However, more robust data are necessary to further validate these results and the clinical implications.