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Related Concept Videos

Disorders of Hemostasis01:24

Disorders of Hemostasis

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Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
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Introduction to Hemostasis01:05

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Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized,...
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Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

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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...
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Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

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Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
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Pharmacokinetics in Pediatric Patients: Drug Distribution01:17

Pharmacokinetics in Pediatric Patients: Drug Distribution

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Drug distribution in the pediatric population exhibits unique challenges and considerations due to the physiological differences between children, particularly neonates and infants, and adults. A crucial aspect of pediatric pharmacology is understanding how these differences impact the pharmacokinetics of various drugs, necessitating age-specific dosing strategies to ensure efficacy and safety.Neonates and infants have a higher total body water content, ~75%–90% of their body weight,...
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Rh Blood Group01:19

Rh Blood Group

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The Rhesus (Rh) antigen is crucial in determining blood groups and ensuring compatibility during blood transfusions.
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Updated: Nov 12, 2025

Modeling Neonatal Intraventricular Hemorrhage Through Intraventricular Injection of Hemoglobin
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Modeling Neonatal Intraventricular Hemorrhage Through Intraventricular Injection of Hemoglobin

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Hemostatic Challenges in Neonates.

Patricia Davenport1, Martha Sola-Visner1

  • 1Division of Newborn Medicine, Boston Children's Hospital, Boston, MA, United States.

Frontiers in Pediatrics
|March 19, 2021
PubMed
Summary
This summary is machine-generated.

Neonatal hemostasis differs from adults, yet is balanced. Treating non-bleeding neonates with low platelets or prolonged clotting times using blood products may increase harm.

Keywords:
FFP transfusionbleedinghemostasisneonateplatelet functionplatelet transfusion

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Area of Science:

  • Neonatal hemostasis
  • Pediatric coagulation
  • Hematology

Background:

  • Neonatal hemostasis presents unique characteristics compared to adults, including hyporeactive platelets and reduced coagulation factors.
  • Pre-term neonates face a high risk of bleeding, such as intraventricular hemorrhages, prompting frequent blood product administration.
  • Current practices often involve transfusing platelets and fresh frozen plasma (FFP) to neonates with low platelet counts or prolonged clotting times to mitigate bleeding risks.

Purpose of the Study:

  • To provide a clinical overview of neonatal bleeding, including incidence, common sites, and risk factors.
  • To delineate key developmental differences in primary and secondary hemostasis between neonates and adults.
  • To review current and emerging strategies for predicting, evaluating, and treating neonatal bleeding.

Main Methods:

  • Literature review focusing on neonatal hemostasis and bleeding.
  • Analysis of developmental differences in coagulation and platelet function.
  • Evaluation of clinical tests for neonatal bleeding assessment.

Main Results:

  • Neonatal hemostasis is a balanced system, counteracting apparent deficiencies with factors like high von Willebrand factor (vWF) and hematocrit.
  • Administration of platelets and FFP to non-bleeding neonates based on lab values has not reduced bleeding and may increase morbidity/mortality.
  • Existing clinical tests for neonatal bleeding have limitations due to the unique neonatal hemostatic system.

Conclusions:

  • The neonatal hemostatic system is effectively balanced, despite differences from adults.
  • Transfusing blood products to non-bleeding neonates based solely on laboratory results is not recommended and may be harmful.
  • Accurate prediction, evaluation, and treatment of neonatal bleeding require consideration of the unique neonatal hemostatic profile.