Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Rapidly Varying Flow01:24

Rapidly Varying Flow

57
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
57
Design Example: Designing a Residential Plumbing System01:25

Design Example: Designing a Residential Plumbing System

669
The design of residential plumbing systems requires carefully evaluating water demand, flow rates, and pressure dynamics to ensure both efficiency and reliability. The nature of water flow within pipes is defined by its Reynolds number, which classifies flow as either laminar (smooth) or turbulent.
669
Typical Model Studies01:30

Typical Model Studies

354
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
354
Poiseuille's Law and Reynolds Number01:10

Poiseuille's Law and Reynolds Number

6.5K
Any fluid in a horizontal tube can flow due to pressure differences—fluid flows from high to low pressure. The flow rate (Q) is the ratio of pressure difference and resistance through a horizontal tube. The greater the pressure difference, the higher the flow rate. The flow resistance is expressed as:
6.5K
Dimensionless Groups in Fluid Mechanics01:15

Dimensionless Groups in Fluid Mechanics

319
Dimensionless groups in fluid mechanics provide simplified ratios that help analyze fluid behavior without relying on specific units. The Reynolds number (Re), which represents the ratio of inertial to viscous forces, distinguishes between laminar and turbulent flows, making it essential in the design of pipelines and aerodynamic surfaces. The Froude number (Fr), the ratio of inertial to gravitational forces, is particularly useful in predicting wave formation and hydraulic jumps in...
319
General External Flow Characteristics01:26

General External Flow Characteristics

109
The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
109

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Coronary Computed Tomography Angiography for the Diagnosis and Revascularization Guidance of Coronary Bifurcation Lesions: A Contemporary Review.

Journal of clinical medicine·2026
Same author

Temporal Trends and Clinical Characteristics of Incretin-Based Therapy Use in Women With Polycystic Ovary Syndrome: A Real-World Cohort Study From a Polish Private Healthcare Network.

Diabetes, obesity & metabolism·2026
Same author

Vascular Endothelial Function, Carotid Intima-Media Thickness and Coronary Artery Calcification in Women.

Journal of clinical medicine·2026
Same author

Adherence and Persistence with GLP-1-Based Therapies: International Real-World Evidence and the Role of Nutritional and Lifestyle Support-A Narrative Review.

Nutrients·2026
Same author

Switching patterns of GLP-1 receptor agonists from 2018 to 2025 in the largest private healthcare network in Poland.

Acta diabetologica·2026
Same author

Primary Results of the SALAMANDER Registry: A Multicenter Observational Cohort Study.

Journal of the American Heart Association·2026

相关实验视频

Updated: Jun 18, 2025

Ultrasound Based Assessment of Coronary Artery Flow and Coronary Flow Reserve Using the Pressure Overload Model in Mice
06:39

Ultrasound Based Assessment of Coronary Artery Flow and Coronary Flow Reserve Using the Pressure Overload Model in Mice

Published on: April 13, 2015

14.9K

分数流量储备利用的性别差异.

Marta Bujak1, Krzysztof Malinowski2,3, Zbigniew Siudak4

  • 1Division of Cardiology and Structural Heart Diseases, Medical University of Silesia, 40-055 Katowice, Poland.

Journal of clinical medicine
|July 27, 2024
PubMed
概括

尽管女性越来越多地使用分量流量储备 (FFR),但女性接受分量流量储备 (FFR) 引导程序的可能性较低. 女性性别是FFR在心血管干预中利用的独立负面预测因素.

关键词:
在FFR中,FFR是FFR.这是PCI的PCI.生理评估生理评估.在性爱中,性爱是性爱.

更多相关视频

Ultrasound Assessment of Flow-Mediated Dilation of the Brachial and Superficial Femoral Arteries in Rats
09:40

Ultrasound Assessment of Flow-Mediated Dilation of the Brachial and Superficial Femoral Arteries in Rats

Published on: November 3, 2016

11.6K
Author Spotlight: Enhancing Diagnostic Strategies and Biomarker Development for Comprehensive Lung Function Analysis
05:56

Author Spotlight: Enhancing Diagnostic Strategies and Biomarker Development for Comprehensive Lung Function Analysis

Published on: August 9, 2024

1.2K

相关实验视频

Last Updated: Jun 18, 2025

Ultrasound Based Assessment of Coronary Artery Flow and Coronary Flow Reserve Using the Pressure Overload Model in Mice
06:39

Ultrasound Based Assessment of Coronary Artery Flow and Coronary Flow Reserve Using the Pressure Overload Model in Mice

Published on: April 13, 2015

14.9K
Ultrasound Assessment of Flow-Mediated Dilation of the Brachial and Superficial Femoral Arteries in Rats
09:40

Ultrasound Assessment of Flow-Mediated Dilation of the Brachial and Superficial Femoral Arteries in Rats

Published on: November 3, 2016

11.6K
Author Spotlight: Enhancing Diagnostic Strategies and Biomarker Development for Comprehensive Lung Function Analysis
05:56

Author Spotlight: Enhancing Diagnostic Strategies and Biomarker Development for Comprehensive Lung Function Analysis

Published on: August 9, 2024

1.2K

科学领域:

  • 心脏病学 心脏病学
  • 干预心脏病学 干预心脏病学
  • 医疗保健服务研究 医疗服务研究

背景情况:

  • 心血管疾病诊断和结果的性别相关差异得到了充分证实.
  • 诊断不足和诊断延迟在女性患者中更为普遍.
  • 认识到性别差异对于改善心血管保健和结果至关重要.

研究的目的:

  • 调查使用分流储备 (FFR) 指导程序的基于性别的差异.
  • 分析在接受血管造影和/或皮肤冠状动脉干预 (PCI) 的患者中使用FFR.

主要方法:

  • 从国家注册表 (2014-2022) 中回顾分析了超过140万个血管造影和/或PCI手术.
  • 后勤回归分析以确定女性性别与FFR利用之间的关联.
  • 在不同临床表现的男性和女性之间的FFR率的比较.

主要成果:

  • 总体而言,与男性相比,女性 (3.45%) 的FFR利用率较低 (4.15%).
  • 虽然FFR在急性冠状动脉综合征的女性中更为频繁,但与男性相比,慢性冠状动脉综合征患者的发病率较低.
  • 接受FFR指导手术的女性年龄较大,但与男性相比,心肌梗塞,CABG或之前的PCI病史的可能性较小.

结论:

  • 尽管FFR的采用增加了,但女性的使用率仍然低于男性.
  • 女性性别是FFR利用的独立负面预测因素.
  • 解决FFR使用中的性别差异对于公平的心血管护理至关重要.