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Related Concept Videos

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...
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants01:18

Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants

Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Parenteral Anesthetics: Overview01:24

Parenteral Anesthetics: Overview

Intravenous anesthetics are drugs administered parenterally to induce anesthesia or sedation. Propofol is a widely used agent formulated as a 1% emulsion in soybean oil, glycerol, and egg phosphatide. It induces rapid anesthesia primarily due to its rapid distribution from the bloodstream to target tissues and is metabolized in the liver. However, it can cause significant pain on injection and hypertriglyceridemia. Fospropofol, a water-based prodrug of propofol, lacks these adverse effects.
Local Anesthetics: Clinical Application as Epidural Anesthesia01:29

Local Anesthetics: Clinical Application as Epidural Anesthesia

Epidural anesthetics are administered in the fat-filled epidural space, the outermost part of the spinal canal. This technique is commonly employed for pain management and anesthesia during lower abdomen and pelvis surgeries or labor and delivery.
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Venous Thrombosis III: Interprofessional Care01:29

Venous Thrombosis III: Interprofessional Care

Venous thrombosis requires effective prevention and treatment strategies to improve patient outcomes and reduce potential complications.Prevention StrategiesHealthcare providers must prioritize preventing venous thromboembolism (VTE) for all adult patients upon admission. Interventions depend on bleeding and thrombosis risk, medical history, current medications, diagnoses, planned procedures, and patient preferences. Patients on bed rest should change positions every two hours and, if not...
Disorders of Hemostasis01:24

Disorders of Hemostasis

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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Related Experiment Video

Updated: Jun 23, 2026

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice
08:13

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice

Published on: September 30, 2021

Factor XI deficiency and obstetrical anesthesia.

Amarjeet Singh1, Miriam J Harnett, Jean M Connors

  • 1Division of Obstetric Anesthesiology, Department of Anesthesiology, Harvard Medical School, Brigham and Women's Hospital, 75 Francis St., Boston, MA 02115, USA.

Anesthesia and Analgesia
|May 19, 2009
PubMed
Summary
This summary is machine-generated.

Women with Factor XI (FXI) deficiency can safely receive neuraxial anesthesia during delivery. Careful management with hematology consultation and factor replacement is key to preventing complications.

Related Experiment Videos

Last Updated: Jun 23, 2026

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice
08:13

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice

Published on: September 30, 2021

Area of Science:

  • Obstetrics and Gynecology
  • Hematology
  • Anesthesiology

Background:

  • Factor XI (FXI) deficiency is a rare inherited bleeding disorder.
  • Bleeding severity in FXI deficiency often lacks correlation with plasma factor levels.
  • Management of FXI deficiency during childbirth requires careful consideration.

Purpose of the Study:

  • To evaluate the safety and outcomes of neuraxial anesthesia in parturients with Factor XI deficiency.
  • To determine if FXI deficiency contraindicates neuraxial anesthesia for delivery.

Main Methods:

  • Retrospective review of medical and anesthetic records of 13 parturients with FXI deficiency.
  • Analysis of anesthetic techniques used (neuraxial vs. general anesthesia).
  • Assessment of factor replacement strategies and hematology consultation.

Main Results:

  • Nine parturients received neuraxial anesthesia (epidural, spinal, or combined spinal-epidural).
  • Three received general anesthesia, and one had an unmedicated vaginal delivery.
  • No hematological or anesthetic complications were reported in any cases.

Conclusions:

  • Factor XI deficiency is not an absolute contraindication for neuraxial anesthesia in obstetrics.
  • Appropriate hematology consultation and factor replacement are crucial for safe management.
  • Clinical and laboratory hemostatic evaluation guides anesthetic and factor replacement decisions.