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相关概念视频

Renal Drug Excretion: Glomerular Filtration01:02

Renal Drug Excretion: Glomerular Filtration

276
The kidney serves as the primary organ responsible for eliminating drugs and their metabolites from the body. This process, known as renal elimination, starts with glomerular filtration and results in urine formation. Each kidney houses millions of functional units called nephrons, where urine production occurs. A nephron has two main components: a renal corpuscle and a renal tubule.
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
276
Glomerular Filtration Rate and its Regulation01:28

Glomerular Filtration Rate and its Regulation

2.8K
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...
2.8K
Renal Clearance01:23

Renal Clearance

985
The glomerular filtration rate (GFR) is a critical marker of kidney function, reflecting the efficiency of filtration by the glomeruli. Renal clearance of specific substances, such as inulin or creatinine, is commonly used to measure GFR.
Renal clearance refers to the volume of plasma cleared of a specific substance, such as creatinine, per unit of time. To measure clearance, urine samples are collected over a 24-hour period during each bladder voiding, followed by a single blood sample at the...
985
Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

99
Renal dysfunction significantly impairs the renal clearance of drugs, leading to potential complications in drug therapy. Renal failure, which can be caused by various factors, poses a significant challenge in the elimination of drugs from the body.
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
99
Glomerular Filtration: Net Filtration Pressure01:26

Glomerular Filtration: Net Filtration Pressure

2.5K
Glomerular filtration, a key process in the kidneys, is regulated by three main pressures: Glomerular blood hydrostatic pressure (GBHP), Capsular hydrostatic pressure (CHP), and Blood colloid osmotic pressure (BCOP).
GBHP, with an average value of 55 mmHg, promotes filtration by pushing water and solutes through the filtration membrane. This is balanced by two opposing forces: CHP, a "back pressure" exerted against the filtration membrane by fluid already in the capsular space and renal...
2.5K
Renal Corpuscle01:20

Renal Corpuscle

2.3K
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...
2.3K

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相关实验视频

Updated: Jul 9, 2025

Assessment of Kidney Function in Mouse Models of Glomerular Disease
09:16

Assessment of Kidney Function in Mouse Models of Glomerular Disease

Published on: June 30, 2018

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评估使用proenkephalin的GFR.

Remi Beunders1,2, Leslie J Donato3, Roger van Groenendael1,2,4

  • 1Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, The Netherlands.

Kidney international reports
|November 29, 2023
PubMed
概括

一个新的基于proenkephalin (PENK) 的方程用于估计球过率 (eGFR) 显示了比传统基于肌素的方法更好的准确性. 这种新的生物标志物为监测不同患者群体的功能提供了更敏感的方法.

关键词:
急性脏损伤急性脏损伤肌氨酸是什么意思 肌氨酸是什么意思估计的淋巴膜过率.黄金标准就是黄金标准.功能 功能 功能这就是为什么proenkephalin.

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Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat
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Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat

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A High-throughput Method for Measurement of Glomerular Filtration Rate in Conscious Mice
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A High-throughput Method for Measurement of Glomerular Filtration Rate in Conscious Mice

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相关实验视频

Last Updated: Jul 9, 2025

Assessment of Kidney Function in Mouse Models of Glomerular Disease
09:16

Assessment of Kidney Function in Mouse Models of Glomerular Disease

Published on: June 30, 2018

17.7K
Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat
06:58

Physiology Lab Demonstration: Glomerular Filtration Rate in a Rat

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A High-throughput Method for Measurement of Glomerular Filtration Rate in Conscious Mice
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科学领域:

  • 腎臟病學 (nephrology) 是一種醫學專業.
  • 生物标志物发现发现
  • 临床化学 临床化学

背景情况:

  • 目前对膜过率 (eGFR) 的估计依赖于肌素,这种生物标志物以其不敏感性和晚期检测功能障碍而闻名.
  • 需要新的生物标志物来克服基于肌素的eGFR计算的局限性.

研究的目的:

  • 开发和验证一种基于基素 (PENK) 的新式方程,用于估计淋巴细胞过率 (eGFR).
  • 将基于PENK的eGFR方程与已建立的基于肌素的方程 (MDRD和CKD-EPI) 的性能进行比较.

主要方法:

  • 一项国际多中心研究,涉及1354名患者 (稳定和危急病) 测量GFR (mGFR) 使用iohexol或iothalamate清除.
  • 方程开发使用了一个通用线性模型与一个西格形非线性转移函数,并以数据驱动的方式选择共变量.
  • 在一个验证集中,对偏差,精度和准确性 (P30) 的性能进行了评估,并与MDRD和CKD-EPI方程进行了比较.

主要成果:

  • 基于PENK的方程包括PENK,肌和年龄,在不考虑性别或种族的情况下表现出卓越的表现.
  • 与MDRD和2009年CKD-EPI相比,基于PENK的方程表现出明显较低的偏差,与2021年CKD-EPI相比,具有相似的偏差.
  • 基于PENK的方程的精度 (P30) 为83%,明显高于MDRD (68%) 和2009年的CKD-EPI (76%),与2021年的CKD-EPI (80%) 相似.

结论:

  • 基于proenkephalin (PENK) 的eGFR方程表现出与大多数基于肌素的方程相比的性能提升.
  • 这种新奇的方程提供了一个更准确的,可能更早的功能评估,独立于性别或种族.