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Related Concept Videos

Aneurysm I: Introduction01:30

Aneurysm I: Introduction

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An aortic aneurysm is a localized outpouching or dilation at a weak point in the artery wall. It may involve different parts of the aorta, such as the abdominal aorta, aortic arch, or thoracic aorta.Etiological factorsSeveral disorders are associated with aortic aneurysms.Congenital causes, such as primary connective tissue disorders like Marfan syndrome, impact the integrity and strength of connective tissues, notably affecting the aorta. Marfan syndrome is a genetic disorder that specifically...
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Aneurysm IV: Nursing Management01:22

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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...
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Aneurysm III: Interprofessional Care01:26

Aneurysm III: Interprofessional Care

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Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
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In Vitro Drug Dissolution: Compendial Testing Models I01:13

In Vitro Drug Dissolution: Compendial Testing Models I

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Compendial dissolution methods are standardized procedures defined by pharmacopeias to evaluate the rate at which a drug dissolves in a specific medium. These methods ensure batch-to-batch consistency, enable quality control, and support the prediction of drug bioavailability. They are critical for both immediate and modified-release drug products.The apparatuses used for dissolution testing differ in their design and mechanical function, but all aim to simulate the physiological environment of...
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In Vitro Drug Dissolution: Compendial Testing Models II01:09

In Vitro Drug Dissolution: Compendial Testing Models II

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Various dissolution methods are utilized to assess a drug’s dissolution rate, including the flow-through cell, paddle-over-disk, cylinder, and reciprocating disk methods.The flow-through cell apparatus (USP (United States Pharmacopeia) method 4) comprises a reservoir for the dissolution medium and a pump that propels the medium through the cell containing the test sample. This method is crucial for assessing modified-release dosage forms with minimally soluble active ingredients,...
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Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

Aneurysm II: Clinical Manifestations and Diagnostic Studies

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Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
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Related Experiment Video

Updated: Jan 28, 2026

Biodegradable Magnesium Stent Treatment of Saccular Aneurysms in a Rat Model - Introduction of the Surgical Technique
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Testing bioresorbable stent feasibility in a rat aneurysm model.

Basil Erwin Grüter1,2, Dominik Täschler2, Fabio Strange1,2

  • 1Department of Neurosurgery, Kantonsspital Aarau, Switzerland.

Journal of Neurointerventional Surgery
|March 11, 2019
PubMed
Summary

Bioresorbable magnesium-alloy stents (brMAS) show promise for treating cerebral aneurysms, promoting healing and degrading over time. This approach may reduce risks associated with traditional stents, potentially eliminating the need for long-term antiplatelet therapy.

Keywords:
aneurysmcoilstent

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Area of Science:

  • Biomaterials Science
  • Vascular Surgery
  • Endovascular Therapy

Background:

  • Endovascular treatment of complex cerebral aneurysms has advanced with stent-assisted coiling.
  • Bioresorbable stents could eliminate risks of in-stent thrombosis and lifelong antiplatelet therapy after aneurysm healing.

Purpose of the Study:

  • To evaluate the applicability and compatibility of a novel bioresorbable magnesium-alloy stent (brMAS) for assisted coiling in cerebral aneurysms.

Main Methods:

  • Saccular sidewall aneurysms were created in rats and treated with brMAS (alone, with aspirin, or with coils and aspirin).
  • Control groups included no treatment, aspirin alone, or conventional cobalt-chromium stents.
  • Healing, perfusion, inflammatory responses, and stent degradation were assessed over time using macroscopic, histological, and imaging techniques.

Main Results:

  • brMAS treatment led to advanced aneurysm healing and neointima formation with subsequent stent degradation.
  • Aspirin administration enhanced healing and reduced inflammatory responses.
  • No adverse interactions were observed between platinum coils and brMAS, and progressive degradation was confirmed.

Conclusions:

  • Bioresorbable magnesium-alloy stents (brMAS) effectively induced healing in a rat sidewall aneurysm model.
  • The concept of using bioresorbable materials for aneurysm treatment is promising, potentially leading to complete healing and stent disappearance.
  • Further device refinement and clinical evaluation are warranted for this cerebrovascular treatment strategy.