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相关概念视频

Determination of Renal Drug Clearance: Graphical and Midpoint Methods01:07

Determination of Renal Drug Clearance: Graphical and Midpoint Methods

122
Renal clearance, a crucial parameter in pharmacokinetics, can be determined using two different methods: the graphical method and the midpoint method. These methods provide insights into the rate of drug excretion by the kidneys and aid in assessing renal function.
The graphical method involves plotting the rate of drug excretion in urine against the plasma drug concentration. By analyzing the graph, the clearance can be calculated and obtained. Drugs rapidly excreted by the kidneys exhibit a...
122
Factors Affecting Renal Clearance: Renal Impairment01:17

Factors Affecting Renal Clearance: Renal Impairment

95
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...
95
Renal Clearance01:23

Renal Clearance

939
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...
939
One-Compartment Open Model: Urinary Excretion Data and Determination of k01:11

One-Compartment Open Model: Urinary Excretion Data and Determination of k

175
The one-compartment open model leverages urinary excretion data to estimate renal clearance, which gauges the kidney's capacity to expel a drug. This method offers several benefits, including directly measuring drug elimination and assessing the kidney's contribution to overall drug clearance. However, this approach has limitations. It assumes sole renal excretion of the drug, which is not true for all drugs. Accurate urinary excretion and plasma drug concentration measurement can also...
175
Renal Drug Excretion: Glomerular Filtration01:02

Renal Drug Excretion: Glomerular Filtration

271
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....
271
Dialysis01:27

Dialysis

314
Renal failure occurs when the kidneys lose their ability to filter waste products from the blood effectively. It can be classified into two types: acute renal failure (ARF) and chronic renal failure (CRF).
Acute kidney injury develops suddenly and can be caused by pre-renal causes (e.g., hypovolemia, shock), intrinsic renal causes (e.g., acute tubular necrosis), or post-renal causes (e.g., urinary obstruction). In contrast, chronic renal failure progresses gradually over time and is often...
314

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相关实验视频

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Use of Ultra-high Field MRI in Small Rodent Models of Polycystic Kidney Disease for In Vivo Phenotyping and Drug Monitoring
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在慢性病中评估功能,使用基于多重扩散模型的组图分析.

Guimian Zhong1,2, Luyan Chen2, Zhiping Lin3

  • 1The First Affiliated Hospital of Jinan University, Guangzhou 510632, China.

The British journal of radiology
|January 31, 2024
PubMed
概括

扩散指标的组图分析有效地预测慢性病 (CKD) 中的早期损伤. 这种非侵入性方法使用先进的扩散模型提供了对功能障碍的准确评估.

关键词:
扩散扩散是一种扩散.历史图分析分析 历史图分析磁共振成像技术的使用功能 功能 功能

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科学领域:

  • 医疗成像医学成像
  • 放射学 放射学是一门学科.
  • 腎臟病學 (nephrology) 是一種醫學專業.

背景情况:

  • 慢性病 (CKD) 对健康构成重大负担.
  • 早期发现功能障碍对于及时干预至关重要.
  • 需要使用非侵入性诊断方法来评估早期的CKD.

研究的目的:

  • 为了评估从多重扩散模型的组图特征的诊断性能,在预测慢性病患者的早期功能障碍.
  • 为了比较不同扩散模型 (单指数,IVIM,SEM,DKI) 的有效性和它们的联合使用.

主要方法:

  • 在77名CKD患者和30名健康对照中进行了扩散权重成像 (DWI).
  • 多种扩散模型 (单指数,IVIM,SEM,DKI) 应用于DWI数据.
  • 分析了扩散指标的历史图特征,并与功能相关联 (eGFR,血清肌素).

主要成果:

  • 所有的扩散模型都表现出高的诊断效率,可以从健康对照中区分轻微的CKD.
  • 综合扩散模型实现了预测早期功能障碍的最高AUC (0.861).
  • 在基因图特征和功能临床标志物之间观察到显著的相关性.

结论:

  • 多种扩散指标的基因组图分析是一种可行的方法,用于对CKD早期功能障碍进行非侵入性评估.
  • 先进的扩散模型与组图分析相结合,可提供早期损伤的准确,非侵入性评估.
  • 这种技术有望改善CKD的管理和监控.