相关实验视频
Updated: Jun 29, 2025

08:50
Assessment of Vascular Function in Patients With Chronic Kidney Disease
Published on: June 16, 2014
16.2K
在慢性病中,脑血管二氧化碳的反应性是完整的
Justin D Sprick1, Jeann Sabino-Carvalho2,3, Elsa Mekonnen2,3
1Department of Kinesiology, Health Promotion and Recreation, University of North Texas, Denton, Texas, USA.
Physiological reports
|April 3, 2024
概括
慢性病 (CKD) 不会影响脑血管二氧化碳反应 (CVR). 然而,CVR被发现与慢性瘤患者的估计球过率 (eGFR) 相反相关,这表明了其他中风风险因素.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 神经学 神经学
- 心血管科学 心血管科学
背景情况:
- 慢性病 (CKD) 与脑血管疾病 (如中风) 的更高风险有关.
- 脑血管二氧化碳反应能力 (CVR) 的受损是导致这种风险增加的潜在机制.
- 了解CKD患者的CVR对于识别中风风险因素至关重要.
研究的目的:
- 为了比较CKD患者 (III-IV阶段) 和对照组之间的CVR,对高血压和糖尿病进行了匹配.
- 在CKD患者中研究CVR和估计的淋巴球过率 (eGFR) 之间的关系.
主要方法:
- 使用5%的二氧化碳吸入和自愿高通风来测量CVR.
- 持续监测平均动脉压,潮尾二氧化碳 (etCO2) 和中脑动脉血速 (MCAv).
- 量化为etCO2和MCAv之间的线性关系的CVR.
主要成果:
- 在CKD患者和对照人群之间没有观察到CVR的显著差异.
- 超性心血管回路:CKD = 1.2 ± 0.9厘米/秒/mmHg与CON = 1.3 ± 0.8厘米/秒/mmHg相比.
- 低皮性心血管回路:CKD = 1.3 ± 0.9厘米/秒/mmHg与CON = 1.5 ± 0.7厘米/秒/mmHg相比.
- 综合心血管回路:CKD = 1.5 ± 1.1厘米/秒/mmHg与CON = 1.7 ± 0.8厘米/秒/mmHg (p ≥0.48) 相比.
- 在CKD患者中发现CVR和eGFR之间存在显著的反向关系 (R2 = 0.37,p = 0.02).
结论:
- 脑血管二氧化碳反应性 (CVR) 在慢性病 (CKD) 患者中保持不变.
- 在CKD中,CVR与估计的淋巴膜过率 (eGFR) 有反向关系.
- 这些发现表明,除了CVR之外的其他机制有助于CKD中风风险增加.
相关概念视频
Renal Regulation of Acid-Base Balance
428
Metabolic reactions in the body produce nonvolatile acids, such as sulfuric acid, which generate an acid load of approximately 1 mEq of H+ per kilogram of body weight daily. Excreting H+ in the urine is essential to balance this acid load.
In the kidneys, cells within the proximal convoluted tubules (PCT) and the collecting ducts secrete hydrogen ions (H+) into the tubular fluid. Specifically, in the PCT, Na+/H+ antiporters secrete H+ while reabsorbing Na+.
However, the intercalated cells in...
In the kidneys, cells within the proximal convoluted tubules (PCT) and the collecting ducts secrete hydrogen ions (H+) into the tubular fluid. Specifically, in the PCT, Na+/H+ antiporters secrete H+ while reabsorbing Na+.
However, the intercalated cells in...
428
Renal Drug Excretion: Effect of Urine pH, Flow Rate, and Drug pKa
166
The pH of urine, the drug's pKa, and the urine flow rate are vital parameters for drug reabsorption and excretion. Urinary pH varies between 4.6 and 8.0 and is influenced by diet, drug intake, and the patient's pathophysiology. It affects a drug's ionization state and reabsorption. For instance, carbohydrate-rich food produces alkaline urine promoting drug excretion, while proteins and certain medications like ascorbic acid lead to acidic urine enhancing reabsorption.
The pKa of a...
The pKa of a...
166
Renal Failure: Dose Adjustments
88
In patients with renal impairment, drugs undergo significant changes in their pharmacokinetics, which require dosage adjustments to ensure safe and effective therapy.
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
88
Factors Affecting Renal Clearance: Renal Impairment
91
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...
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...
91
Renal Drug Excretion: Glomerular Filtration
255
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....
Drugs gain access to the kidney via the renal artery, which progressively branches off into afferent arterioles....
255
Renal Corpuscle
2.0K
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...
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...
2.0K

