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Pharmacy-managed, weight-based heparin protocol

M P Rivey¹, J P Peterson

¹Department of Pharmacy Practice, School of Pharmacy, University of Montana, Missoula 59812.

American Journal of Hospital Pharmacy

|February 1, 1993

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A revised heparin therapy protocol, managed by pharmacists and based on patient weight, improved anticoagulation management. This new approach achieved therapeutic partial thromboplastin times faster and more safely than the old fixed-dose method.

Area of Science:

Pharmacology
Clinical Pharmacy
Internal Medicine

Background:

Traditional fixed-dose heparin protocols often lack individualized adjustments, potentially leading to suboptimal anticoagulation.
Nursing staff management of heparin therapy may have limitations in dose adjustment accuracy and documentation.
Optimizing heparin dosing is crucial for effective anticoagulation and patient safety.

Purpose of the Study:

To evaluate a revised heparin therapy protocol emphasizing weight-based dosing and pharmacy-led management.
To compare the efficacy and safety of the revised protocol against a traditional fixed-dose protocol.
To assess improvements in achieving therapeutic anticoagulation and minimizing PTT variability.

Main Methods:

A revised protocol was implemented, incorporating weight-based dosing, diagnosis-specific adjustments, and enhanced laboratory monitoring.

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Pharmacy staff assumed responsibility for managing the revised heparin treatment protocol.

Data on patient demographics, heparin therapy, laboratory results, and warfarin conversion were collected and compared to historical data from a fixed-dose protocol managed by nursing staff.

Main Results:

The revised protocol demonstrated significant improvements in achieving target partial thromboplastin times (PTTs) more rapidly.
Patients on the revised protocol spent more time within the therapeutic PTT range and experienced fewer instances of sub-therapeutic or supra-therapeutic anticoagulation.
Pharmacy management led to more accurate dosing, better documentation, and enhanced overall heparin therapy monitoring.

Conclusions:

A weight-based, pharmacy-managed heparin protocol significantly enhances anticoagulation efficacy and safety.
The revised protocol leads to faster achievement of therapeutic anticoagulation and improved patient outcomes.
Pharmacy involvement in managing heparin therapy improves accuracy, documentation, and adherence to treatment goals.