Related Experiment Videos

In patients post cardiac surgery do high doses of protamine cause increased bleeding?

Kenneth Edward McLaughlin1, Joel Dunning

  • 1Department of Cardiothoracic Surgery, Wythenshawe, South Moor Road, Manchester, M23 9LT, UK.

Interactive Cardiovascular and Thoracic Surgery
|August 3, 2007
PubMed

Insights

High doses of protamine may increase bleeding and affect platelet function after cardiac surgery. These adverse effects are not seen below a 2.6:1 protamine to heparin ratio.

Area of Science:

  • Cardiovascular Surgery
  • Anesthesiology
  • Hematology

Background:

  • Protamine is used to reverse the anticoagulant effects of heparin in cardiac surgery.
  • Concerns exist regarding potential adverse effects of high-dose protamine, including bleeding.

Purpose of the Study:

  • To evaluate the evidence regarding the association between high-dose protamine and increased bleeding in patients undergoing cardiac surgery.

Main Methods:

  • A systematic literature search was conducted to identify relevant studies.
  • Five studies were selected for a best-evidence synthesis based on predefined criteria.

Main Results:

  • High doses of protamine were associated with increased postoperative bleeding.
  • Impaired platelet function was also observed with high-dose protamine administration.
  • These adverse effects were not evident when the protamine to heparin ratio was below 2.6:1.

Conclusions:

  • High-dose protamine administration in cardiac surgery can lead to increased bleeding and impaired platelet function.
  • Maintaining a protamine to heparin ratio below 2.6:1 may mitigate these risks.

Related Concept Videos

Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

Cardiomyopathy VII: Pre and Post Operative Nursing Management

Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
Aneurysm IV: Nursing Management01:22

Aneurysm IV: Nursing Management

Vigilant monitoring for aneurysm rupture is essential for patients undergoing aortic surgery.Preoperative Nursing ManagementContinuously monitor the patient for manifestations of aneurysm rupture, such as pallor, weakness, tachycardia, hypotension, abdominal, back, groin, or periumbilical pain, changes in consciousness, and a pulsating abdominal mass. Regularly assess the patient's peripheral pulses.Instruct the patient to consume a clear liquid diet the day before surgery and administer...
Cardiac Catheterization I: Pre-Procedure Overview01:28

Cardiac Catheterization I: Pre-Procedure Overview

Cardiac catheterization is an invasive diagnostic technique used to identify and evaluate structural and functional diseases of the heart and major blood vessels. This technique diagnoses congenital heart disease, coronary artery disease, valvular heart disease, and coronary spasms and assesses ventricular function. It helps guide treatment decisions, including the need for revascularization procedures like percutaneous coronary intervention (PCI) or coronary artery bypass grafting (CABG) and...
Cardiac Catheterization IV: Nursing Management01:26

Cardiac Catheterization IV: Nursing Management

Nursing responsibilities before cardiac catheterization include:Assess for allergies and establish baseline health status.Before cardiac catheterization, assess the patient for allergies to contrast dye. Perform a comprehensive baseline assessment, including vital signs, heart and breath sounds, and a neurovascular assessment of the extremities, noting distal pulses, skin color, and temperature. Instruct the patient to fast for 8-12 hours before the procedure. Evaluate baseline laboratory...
Cardiac Catheterization II: Right Heart Catheterization01:21

Cardiac Catheterization II: Right Heart Catheterization

Right Heart Catheterization: An OverviewRight heart catheterization is an invasive diagnostic procedure that measures right-sided cardiac and pulmonary artery pressures, calculates cardiac output, and identifies intracardiac shunts. It provides detailed hemodynamic data essential for diagnosing and managing various cardiovascular conditions, such as pulmonary hypertension.Access SitesCommon access sites for right heart catheterization include the internal jugular vein in the neck region, the...