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Related Concept Videos

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 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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Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

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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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Aneurysm I: Introduction01:30

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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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The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a...
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Complementation Tests00:49

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A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
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Related Experiment Video

Updated: Jan 25, 2026

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage
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[Sequential changes in serum complement after aneurysmal subarachnoid hemorrhage].

T Kawano1, Y Yonekawa

  • 1Department of Neurosurgery, National Cardiovascular Center.

No Shinkei Geka. Neurological Surgery
|February 1, 1990
PubMed
Summary

Serum complement levels (C3 and C4) can predict outcomes after aneurysmal subarachnoid hemorrhage. Monitoring these levels aids in therapeutic decisions and prognosis for patients with subarachnoid hemorrhage.

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Last Updated: Jan 25, 2026

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Area of Science:

  • Neurology
  • Immunology

Context:

  • Aneurysmal subarachnoid hemorrhage (SAH) is a critical neurological event.
  • Serum complement system activation is implicated in SAH pathophysiology.
  • Understanding complement's role aids in patient management.

Purpose:

  • To investigate serum complement levels (CH50, C3, C4) in patients post-aneurysmal SAH.
  • To correlate complement levels with clinical parameters like vasospasm and neurological deficit.
  • To assess the utility of complement monitoring for prognosis and therapy selection.

Summary:

  • Serum complement levels (C3, C4) were monitored in 21 patients after aneurysmal SAH.
  • Complement levels showed no significant changes in controls (hypertensive intracerebral hemorrhage).
  • C4 correlated with preoperative grade; C3 and C4 decreased with severe vasospasm and neurological deficit, while mild vasospasm showed transient decreases.

Impact:

  • Sequential determination of serum C3 and C4 levels is a valuable tool.
  • This monitoring aids in selecting appropriate therapy for aneurysmal SAH patients.
  • It also provides a method for predicting the prognosis of patients following SAH.