PMID- 32964730 OWN - NLM STAT- MEDLINE DCOM- 20210524 LR - 20210524 IS - 1542-6270 (Electronic) IS - 1060-0280 (Linking) VI - 55 IP - 5 DP - 2021 May TI - Effectiveness of a Calculation-Free Weight-Based Unfractionated Heparin Nomogram With Anti-Xa Level Monitoring Compared With Activated Partial Thromboplastin Time. PG - 575-583 LID - 10.1177/1060028020961503 [doi] AB - BACKGROUND: Accurate monitoring of intravenous unfractionated heparin (UFH) is essential to mitigate the risk of adverse drug events associated with dosing errors. Although recent data support anti-factor Xa (anti-Xa) monitoring preferentially over activated partial thromboplastin time (aPTT) to improve time to therapeutic anticoagulation, the utility of incorporating anti-Xa monitoring with a calculation-free weight-based UFH nomogram has not been formally evaluated. OBJECTIVE: The primary objective of this study was to evaluate the time to therapeutic anticoagulation of a calculation-free weight-based UFH nomogram integrated with anti-Xa monitoring versus a historical control of aPTT monitoring utilizing manual dose calculations. METHODS: This was a retrospective analysis of patients with anti-Xa monitoring and a novel calculation-free weight-based UFH nomogram compared with a historical control with aPTT monitoring and manual calculations. RESULTS: A total of 103 patients in the aPTT cohort and 100 patients in the anti-Xa cohort were analyzed. The anti-Xa cohort achieved goal therapeutic target 3.8 hours sooner than the aPTT cohort (P = 0.03). Patients with anti-Xa monitoring required 1 fewer adjustment per 2.5 patient-days of UFH with the venous thromboembolism nomogram (P = 0.02). Patients in the aPTT cohort required more infusion interruptions because of supratherapeutic values (P = 0.007) and boluses because of subtherapeutic values (P = 0.044). There were no differences in rates of thromboembolism, major bleeding, or clinically relevant nonmajor bleeding between the cohorts. CONCLUSION AND RELEVANCE: This study demonstrated that anti-Xa UFH monitoring integrated with a calculation-free nomogram results in faster time to therapeutic anticoagulation and fewer dose adjustments compared with aPTT monitoring with manual calculations. FAU - Kindelin, Nicole M AU - Kindelin NM AUID- ORCID: 0000-0002-1503-5762 AD - VA Pittsburgh Healthcare System, Pittsburgh, PA, USA. FAU - Anthes, Ananth M AU - Anthes AM AUID- ORCID: 0000-0002-4461-9185 AD - VA Pittsburgh Healthcare System, Pittsburgh, PA, USA. FAU - Providence, Sarah M AU - Providence SM AD - VA Pittsburgh Healthcare System, Pittsburgh, PA, USA. FAU - Zhao, Xinhua AU - Zhao X AD - VA Center for Health Equity Research and Promotion, Pittsburgh, PA, USA. FAU - Aspinall, Sherrie L AU - Aspinall SL AD - VA Center for Health Equity Research and Promotion, Pittsburgh, PA, USA. AD - VA Center for Medication Safety, Hines, IL, USA. LA - eng PT - Comparative Study PT - Journal Article DEP - 20200923 PL - United States TA - Ann Pharmacother JT - The Annals of pharmacotherapy JID - 9203131 RN - 0 (Anticoagulants) RN - 0 (Factor Xa Inhibitors) RN - 9005-49-6 (Heparin) SB - IM MH - Aged MH - Aged, 80 and over MH - Anticoagulants/*administration & dosage/adverse effects MH - Blood Coagulation/drug effects/physiology MH - Cohort Studies MH - Drug Monitoring/*methods/standards MH - Factor Xa Inhibitors/*administration & dosage/adverse effects MH - Hemorrhage/blood/chemically induced MH - Heparin/*administration & dosage/adverse effects MH - Humans MH - Male MH - Middle Aged MH - *Nomograms MH - Partial Thromboplastin Time/methods/standards MH - Retrospective Studies MH - Thromboembolism/blood/drug therapy OTO - NOTNLM OT - anti-factor Xa OT - anticoagulants OT - dose-response relationship OT - unfractionated heparin EDAT- 2020/09/24 06:00 MHDA- 2021/05/25 06:00 CRDT- 2020/09/23 08:38 PHST- 2020/09/24 06:00 [pubmed] PHST- 2021/05/25 06:00 [medline] PHST- 2020/09/23 08:38 [entrez] AID - 10.1177/1060028020961503 [doi] PST - ppublish SO - Ann Pharmacother. 2021 May;55(5):575-583. doi: 10.1177/1060028020961503. Epub 2020 Sep 23.