International Journal of Clinical Pharmacy

, Volume 39, Issue 3, pp 569–572 | Cite as

Transition of stable patients from traditional anticoagulation clinic services to telephonic management

  • Brian T. CryderEmail author
  • Margaret A. Felczak
  • Adwoa Darkwa
  • Hiral Patel
  • Justine D. Janociak
  • Rami Rihani
Short Research Report


Background Outpatient warfarin dosing and monitoring with telephonic anticoagulation management (TAM) could be an effective alternative to other more labor intensive management models. Objectives To evaluate the time in therapeutic range (TTR) and number of extreme INR values (<1.5 or >4.5) of a telephonic system of warfarin management for stable patients who currently utilized traditional anticoagulation management services (AMSs). Method A retrospective, observational cohort with three groups (1) patients transitioned from an office-based anticoagulation clinic to TAM, (2) patients continuously enrolled in office-based AMS, (3) patients continuously managed by usual physician care without specialized anticoagulation services (UPC). Data was collected for six months before and six months after transition. Results All groups demonstrated decreased TTR from baseline to active phase, with the TAM and AMS groups showing similar magnitude of reduction (−10.61 and −12.66% respectively) but UPC group producing a greater drop (−20.08%). The TAM and AMS groups had similar rates of extreme INR levels; UPC had higher numbers of extreme INRs in three of the four measurements. Conclusion Stable patients transitioned from office-based anticoagulation clinic to a telephonic model of management performed equally as well as those who continued traditional enrollment.


Anticoagulation clinic International normalized ratio Pharmacist Telehealth United States Warfarin 



This study received no external funding.

Conflicts of interest

The authors have no relevant conflicts of interest to disclose.


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Copyright information

© Springer International Publishing 2017

Authors and Affiliations

  1. 1.Advocate Medical GroupChicagoUSA
  2. 2.Chicago College of PharmacyMidwestern UniversityDowners GroveUSA

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