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Updated: Dec 30, 2025
11:17
Rapid Point-of-Care Assay of Enoxaparin Anticoagulant Efficacy in Whole Blood
Published on: October 12, 2012
14.3K
Evaluating anticoagulation sensitivity among elderly patients managed with an institution's heparin protocol using
Adley Lemke1, Jean Kohs1, Lynn Weber1
1Pharmacy Department, Hennepin Healthcare, Minneapolis, MN.
Summary
Elderly patients show higher initial anti-factor Xa levels with unfractionated heparin. This suggests a need for further study into potential age-specific dosing protocols for improved heparin therapy.
Area of Science:
- Pharmacology
- Geriatric Medicine
- Internal Medicine
Background:
- Heparin is a critical anticoagulant used in various clinical settings.
- Understanding age-related differences in drug response is essential for optimizing patient care.
Purpose of the Study:
- To compare unfractionated heparin response between elderly and nonelderly adult patients.
- To assess institutional heparin protocols for efficacy in different age groups.
Main Methods:
- Retrospective cohort study of 325 hospitalized adults receiving unfractionated heparin.
- Patients categorized as elderly (≥70 years) or nonelderly (18-69 years).
- Comparison of anti-factor Xa (anti-Xa) levels against a target range of 0.3-0.7 IU/mL.
Main Results:
- Elderly patients exhibited higher initial anti-Xa levels across ACS, DVT/PE, and surgery protocols (P < 0.05).
- The ACS protocol showed a higher frequency of above-target anti-Xa levels in the elderly (P = 0.03).
- No significant differences in other outcomes were detailed.
Conclusions:
- Elderly patients demonstrate increased sensitivity to unfractionated heparin.
- Further research is warranted to explore age-specific heparin dosing strategies.
- Potential need for distinct heparin protocols for geriatric populations.
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