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相关概念视频

Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

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Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of...
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Glomerular Filtration01:15

Glomerular Filtration

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The filtration membrane in the renal system is a highly specialized structure essential for filtering blood. It consists of glomerular capillaries and podocytes, forming a selective barrier that permits the passage of water and small solutes while restricting most plasma proteins and blood cells.
Components of the Filtration Membrane
The filtration process involves three key layers: the glomerular endothelial cells, the basement membrane, and the podocyte-formed filtration slits.
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Renal Corpuscle01:20

Renal Corpuscle

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The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous...
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Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Nephrons01:10

Nephrons

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The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma...
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Glomerular Filtration Rate and its Regulation01:28

Glomerular Filtration Rate and its Regulation

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The Glomerular Filtration Rate (GFR) is a measure of kidney function, reflecting the volume of filtrate formed per minute in the kidneys. On average, GFR is approximately 125 mL/min in males and 105 mL/min in females. Maintaining a relatively constant GFR is essential for the kidneys to effectively regulate body fluid homeostasis and maintain extracellular stability.
GFR regulation involves two primary intrinsic controls: the myogenic and tubuloglomerular feedback mechanisms.
The myogenic...
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相关实验视频

Updated: Jan 10, 2026

Nephrotic Syndrome I : Introduction
01:24

Nephrotic Syndrome I : Introduction

Published on: June 19, 2025

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全球调查人类心房动的导管切除方法,疗效和安全性.

Riccardo Cappato1, Hugh Calkins, Shih-Ann Chen

  • 1Arrhythmia and Electrophysiology Center, Policlinico San Donato, Via Morandi 30, 20097 San Donato Milanese, Milan, Italy. rcappato@libero.it

Circulation
|February 23, 2005
PubMed
概括

导管切除 (CA) 用于心房动 (AF) 显示在世界各地不断发展的方法和越来越多的使用. 这种程序具有显著的疗效,超过75%的患者无症状,但需要仔细考虑其6%的并发症率.

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相关实验视频

Last Updated: Jan 10, 2026

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Published on: June 19, 2025

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科学领域:

  • 心脏病学 心脏病学
  • 电子生理学 电子生理学
  • 医疗技术 医疗技术 医学技术

背景情况:

  • 心房动 (AF) 是一种普遍存在的心律失常症,需要有效治疗.
  • 导管切除 (CA) 已成为AF的关键治疗选择.
  • 了解AF的CA全球实践对于临床指导至关重要.

研究的目的:

  • 开展一个全面的全球性关于导管切除 (CA) 对心房动 (AF) 的调查.
  • 在全球范围内调查CA对AF的不断发展的方法,疗效和安全性.
  • 为当前CA在管理AF的实践提供一个基准.

主要方法:

  • 在全球777个中心分发了详细的问卷.
  • 从181个中心收集了数据,这些中心正在进行AF的CA计划 (1995-2002).
  • 分析包括患者数量,治疗的AF类型,切除技术,成功率和并发症数据.

主要成果:

  • 对于AF的CA,患者人数从1995年的18人大幅增加到2002年的5050人.
  • 到2000年至2002年,肺静脉电气断开成为主要的技术.
  • 超过75%的患者在废除后实现了无症状状态,主要并发症率为6.0%.

结论:

  • 对于AF中CA的全球实践是多样化和不断发展的.
  • CA在管理AF方面表现出相当大的有效性,大多数患者实现了症状缓解.
  • 这项调查为临床医生提供了关于CA作为AF治疗选择的宝贵指南.