相关实验视频
Updated: Feb 5, 2026

11:13
Porcine Model of Infrarenal Abdominal Aortic Aneurysm
Published on: November 21, 2019
9.8K
针对腹腔大动脉动脉瘤结构完整性的个性化评估
Mostafa Jamshidian1, Adam Wittek1, Saeideh Sekhavat1
1Intelligent Systems for Medicine Laboratory, The University of Western Australia, Perth, Australia.
概括
一种新的非侵入性方法使用4D-CTA和血压评估腹腔大动脉动脉瘤 (AAA) 壁完整性. 它揭示了AAA壁比健康的大动脉更硬,在扩张的区域有弱区域.
科学领域:
- 生物医学工程 生物医学工程
- 计算生物力学 计算生物力学
- 医疗成像医学成像
背景情况:
- 腹腔大动脉瘤 (AAA) 存在破裂风险,需要准确的结构完整性评估.
- 目前用于破裂风险估计的生物力学方法需要体内壁强度数据,而这在人类中是无法获得的.
- 需要使用非侵入性方法来评估AAA墙壁生物力学.
研究的目的:
- 引入一种新的,针对患者的,非侵入性方法来评估AAA墙壁的结构完整性.
- 开发一种生物力学评估,同时考虑AAA壁的张力和应变.
- 计算一个新的指数,相对结构完整性指数 (RSII),用于量化局部墙壁刚度.
主要方法:
- 利用时间解析的3D计算机断层扫描血管造影 (4D-CTA) 和血压数据.
- 综合墙壁应变 (心脏周期) 和墙壁张力分析.
- 计算了相对结构完整性指数 (RSII) 来测量局部墙壁刚度,独立于混因素.
主要成果:
- 该方法在三家医院的20名患者中显示出一致性,显示出类似的RSII值.
- 与健康的大动脉壁相比,AAA壁表现出明显更高的刚度.
- 较低刚度的局部区域主要在AAA壁的最扩张区域被确定.
结论:
- 开发的非侵入性方法提供了AAA墙壁结构完整性的可靠评估.
- 研究结果支持AAA壁比健康的大动脉更硬,有特定的脆弱区域.
- RSII为了解AAA生物力学和潜在预测破裂风险提供了一个有价值的工具.
相关概念视频
Aneurysm I: Introduction
423
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...
423
Abdominal Aorta
2.4K
Once the aorta traverses the diaphragmatic plane at the aortic hiatus, it is known as the abdominal aorta. This anatomical structure is positioned leftward of the spinal column, encased within a cocoon of adipose tissue behind the peritoneal cavity. It terminates at the L4 vertebra, where it splits into the common iliac arteries. Prior to this bifurcation, the abdominal aorta gives rise to several vital branches.
The celiac trunk, a singular artery, divides into the left gastric artery, which...
The celiac trunk, a singular artery, divides into the left gastric artery, which...
2.4K
Integration by Parts: Indefinite Integrals
175
Integration by parts is a fundamental technique in calculus for evaluating integrals involving the product of two functions. It is particularly useful when direct integration is not feasible. The method is based on the product rule for differentiation, which states that the derivative of a product equals the derivative of the first function times the second, plus the first function times the derivative of the second. By integrating this identity and rearranging terms, the integration by parts...
175
Integration by Parts: Definite Integrals
82
Definite integrals involving the product of two functions over a fixed interval can be evaluated using integration by parts. This method rewrites the integral as the difference of a product evaluated at the endpoints and a remaining definite integral that is often simpler to compute.A representative example is the definite integral of the inverse tangent function. Since there is no direct integration formula for arctan x, the integrand is rewritten as a product of arctan x and the...
82
Ultrasound I: Abdominal Ultrasonography
1.6K
Introduction:
Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
Procedure:
This diagnostic tool allows the clinician to visually inspect internal structures within the abdomen, including vital organs such as the liver, gallbladder, pancreas, kidneys, and spleen.
The abdominal ultrasound process begins with applying a special gel to the patient's skin over the abdomen. This gel enhances the...
Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
Procedure:
This diagnostic tool allows the clinician to visually inspect internal structures within the abdomen, including vital organs such as the liver, gallbladder, pancreas, kidneys, and spleen.
The abdominal ultrasound process begins with applying a special gel to the patient's skin over the abdomen. This gel enhances the...
1.6K
Abdominal Regions and Quadrants
17.4K
To promote clear communication, for instance, about the location of a patient's abdominal pain or a suspicious mass, anatomists and clinicians typically use imaginary lines to categorize the abdominopelvic cavity into either four quadrants or nine regions to identify organs in the cavity.
The simpler quadrants approach, which is more commonly used in medicine, subdivides the cavity with one horizontal and one vertical line that intersects at the patient's umbilicus (navel). The four...
The simpler quadrants approach, which is more commonly used in medicine, subdivides the cavity with one horizontal and one vertical line that intersects at the patient's umbilicus (navel). The four...
17.4K

