Computer-assisted heparin monitoring

Area of Science:

• Biomedical Engineering
• Anesthesiology
• Hematology

Background:

• Effective anticoagulation management is critical during cardiopulmonary bypass (CPB) to prevent thromboembolic events and bleeding complications.
• Traditional heparin monitoring methods may lack real-time precision, potentially leading to suboptimal anticoagulation or excessive protamine administration.
• The Bull protocol provides a framework for heparin management, but its practical implementation requires efficient monitoring tools.

Purpose of the Study:

• To develop and evaluate a microcomputer-based program for real-time heparin monitoring during CPB using the Bull protocol.
• To enhance the precision of heparin dosing and protamine neutralization during CPB procedures.
• To provide operators with immediate feedback on heparin tolerance and identify unusual response patterns.

Main Methods:

• A microcomputer program was developed to implement the Bull protocol for heparin monitoring.
• The program displays the in-vivo heparin tolerance curve and the patient's effective plasma heparin level.
• It calculates necessary incremental heparin doses for anticoagulation and determines protamine doses for neutralization.
• The system is designed to flag unusual heparin response curves and suggest potential causes.

Main Results:

• The program successfully displays in-vivo heparin tolerance curves and calculates effective heparin levels.
• It accurately determines incremental heparin doses required for maintaining anticoagulation during CPB.
• The system calculates and displays the precise protamine dose needed for heparin neutralization post-procedure.
• Unusual heparin response curves are flagged, with suggested explanations provided to the operator.

Conclusions:

• The developed microcomputer program offers a precise and efficient method for heparin monitoring during CPB.
• This tool facilitates optimized anticoagulation and accurate protamine dosing, potentially improving patient outcomes.
• The program's ability to identify and explain unusual heparin responses enhances clinical decision-making and reduces training time.