PMID- 15222660 OWN - NLM STAT- MEDLINE DCOM- 20041015 LR - 20191210 IS - 0277-0008 (Print) IS - 0277-0008 (Linking) VI - 24 IP - 6 DP - 2004 Jun TI - Achieving target antifactor Xa activity with a heparin protocol based on sex, age, height, and weight. PG - 713-9 AB - STUDY OBJECTIVES: To develop and validate an improved unfractionated heparin (UFH) dosage protocol, using antifactor Xa levels as the outcome variable. DESIGN: Prospective case series. SETTING: A 625-bed, adults-only private, tertiary care teaching hospital. PATIENTS: Three hundred seventy-two patients receiving UFH for eight different indications were in the protocol derivation group. One hundred ninety-seven patients were in the final validation group. Intervention. Variables that predicted successful UFH treatment were determined by analysis of variance and regression. MEASUREMENTS AND MAIN RESULTS: Sex, age, height, weight, UFH dosage, and antifactor Xa levels were variables. A regression model using sex, age, height, and weight was superior to a weight-only model in predicting UFH dosage. Target-range antifactor Xa levels were achieved with the new protocol in 122 (87%) of 140 patients within 24 hours of start of therapy. CONCLUSION: A UFH dosage protocol based on patient sex, age, height, and weight produced improved initial target antifactor Xa levels compared with a weight-based protocol. The protocol is computerized and easy to apply. FAU - Rosborough, Terry K AU - Rosborough TK AD - Medical Education Department, Abbott Northwestern Hospital, Minneapolis, Minnesota 55407, USA. FAU - Shepherd, Michele F AU - Shepherd MF LA - eng PT - Comparative Study PT - Journal Article PT - Validation Study PL - United States TA - Pharmacotherapy JT - Pharmacotherapy JID - 8111305 RN - 0 (Anticoagulants) RN - 0 (Factor Xa Inhibitors) RN - 9005-49-6 (Heparin) SB - IM MH - Adolescent MH - Adult MH - Age Factors MH - Aged MH - Aged, 80 and over MH - Anticoagulants/*administration & dosage/blood MH - Body Height MH - *Body Weight MH - Clinical Protocols MH - Drug Monitoring/methods/*standards MH - *Factor Xa Inhibitors MH - Female MH - Heparin/*administration & dosage/blood MH - Humans MH - Male MH - Middle Aged MH - Partial Thromboplastin Time MH - Prospective Studies MH - Sex Factors EDAT- 2004/06/30 05:00 MHDA- 2004/10/16 09:00 CRDT- 2004/06/30 05:00 PHST- 2004/06/30 05:00 [pubmed] PHST- 2004/10/16 09:00 [medline] PHST- 2004/06/30 05:00 [entrez] AID - 10.1592/phco.24.8.713.36067 [doi] PST - ppublish SO - Pharmacotherapy. 2004 Jun;24(6):713-9. doi: 10.1592/phco.24.8.713.36067.