Heparin Therapy: regimens and management.

Area of Science:

• Pharmacology
• Hematology
• Thrombosis

Background:

• Heparin is a primary antithrombotic agent.
• It functions by potentiating plasma antithrombin, inhibiting coagulation factors like thrombin.
• Its use is critical in managing pulmonary embolism and deep venous thrombosis.

Purpose of the Study:

• To review the indications and administration methods of heparin.
• To assess the safety and efficacy of different heparin dosing strategies.
• To highlight the increasing incidence and importance of monitoring for heparin-induced thrombocytopenia.

Main Methods:

• Review of existing literature on heparin's mechanism of action, clinical applications, and adverse effects.
• Analysis of data regarding intravenous (full-dose and continuous infusion) versus subcutaneous (low-dose) heparin administration.
• Examination of trends in heparin-induced thrombocytopenia incidence.

Main Results:

• Full-dose intravenous heparin is indicated for established deep venous thrombosis and pulmonary embolism.
• Continuous intravenous infusion may be safer than intermittent injections.
• Low-dose subcutaneous heparin is effective for preventing thigh vein thrombi and fatal pulmonary embolism in specific surgical patients.
• Heparin's efficacy in preventing pulmonary emboli post-hip surgery is unproven.
• Severe heparin-induced thrombocytopenia incidence is reportedly increasing.

Conclusions:

• Heparin is a vital antithrombotic, but its administration requires careful consideration of risks and benefits.
• Continuous infusion and low-dose subcutaneous administration offer specific advantages.
• Vigilant monitoring of platelet counts is essential for all patients receiving heparin due to the rising risk of thrombocytopenia.