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Related Concept Videos

Ionic Bonds00:42

Ionic Bonds

Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
Disorder of Water Balance01:29

Disorder of Water Balance

Water balance disorders are medical conditions that occur when there is a deviation from the body's water volume or osmolarity, disrupting normal homeostasis and leading todehydration, hypotonic hydration, hyperhydration, edema, or water intoxication.
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
Regulation of Water Intake01:25

Regulation of Water Intake

Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
Hyperosmolar Hyperglycemic State01:21

Hyperosmolar Hyperglycemic State

Hyperosmolar Hyperglycemic State, or HHS, is a serious and life-threatening complication of type 2 diabetes mellitus. It is characterized by three main features: severe hyperglycemia, profound dehydration, and elevated serum osmolality, all occurring without significant ketoacidosis.HHS typically develops in older adults or individuals with limited access to fluids. This may result from illness, cognitive impairment, or medications such as diuretics or corticosteroids. These factors reduce...
Antihypertensive Drugs: Potassium-Sparing Diuretics01:28

Antihypertensive Drugs: Potassium-Sparing Diuretics

Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...
Diabetes Insipidus I: Introduction01:29

Diabetes Insipidus I: Introduction

Definition Diabetes insipidus is a disorder marked by the production of large amounts of dilute urine because of impaired vasopressin production, release, or kidney response. The lack of effective vasopressin action limits water reabsorption in the renal collecting ducts, which leads to excessive urinary water loss and intense thirst.Clinical PresentationIndividuals with diabetes insipidus report persistent thirst and very high urine output. In severe cases, fluid intake can reach up to 20...

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Related Experiment Video

Updated: May 18, 2026

Description of a Swine Infant Model of Volume-Controlled Hemorrhagic Shock
09:09

Description of a Swine Infant Model of Volume-Controlled Hemorrhagic Shock

Published on: November 3, 2023

[Hyponatremia].

S Heinrich1, A Wagner, P Gross

  • 1Medizinische Klinik III/Abteilung Nephrologie, Universitätsklinikum Carl Gustav Carus, Fetscherstrasse 74, Dresden, Germany. sebastian.heinrich@uniklinikum-dresden.de

Medizinische Klinik, Intensivmedizin Und Notfallmedizin
|September 6, 2012
PubMed
Summary
This summary is machine-generated.

Hyponatremia, a common hospital condition, involves low serum sodium. New vasopressin antagonists offer an effective and safe treatment for euvolemic hyponatremia.

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Exploring Arterial Smooth Muscle Kv7 Potassium Channel Function using Patch Clamp Electrophysiology and Pressure Myography
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Exploring Arterial Smooth Muscle Kv7 Potassium Channel Function using Patch Clamp Electrophysiology and Pressure Myography

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Last Updated: May 18, 2026

Description of a Swine Infant Model of Volume-Controlled Hemorrhagic Shock
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Description of a Swine Infant Model of Volume-Controlled Hemorrhagic Shock

Published on: November 3, 2023

Evaluation of Hydration Status by Bioelectrical Impedance Vector Analysis in Patients with Ischemic Heart Disease Undergoing Exercise Stress Test
10:21

Evaluation of Hydration Status by Bioelectrical Impedance Vector Analysis in Patients with Ischemic Heart Disease Undergoing Exercise Stress Test

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Exploring Arterial Smooth Muscle Kv7 Potassium Channel Function using Patch Clamp Electrophysiology and Pressure Myography
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Exploring Arterial Smooth Muscle Kv7 Potassium Channel Function using Patch Clamp Electrophysiology and Pressure Myography

Published on: September 14, 2012

Area of Science:

  • Internal Medicine
  • Nephrology
  • Endocrinology

Context:

  • Hyponatremia is the most frequent electrolyte disturbance in hospitalized patients.
  • It is defined by serum sodium concentration <135 mmol/l, with varying symptoms based on severity and duration.
  • Distinguishing between euvolemic, hypervolemic, and hypovolemic hyponatremia is crucial for treatment.

Purpose:

  • To review the pathophysiology and therapeutic options for hyponatremia.
  • To highlight the limitations of traditional treatments for euvolemic and hypervolemic hyponatremia.
  • To introduce vaptans as a novel pharmacological approach.

Summary:

  • Hyponatremia presents with symptoms ranging from mild cognitive issues to severe neurological deficits.
  • Pathogenesis involves increased ADH levels and fluid intake, necessitating tailored treatment strategies.
  • Vaptans, specifically tolvaptan, represent a new, effective, and safe oral therapy for euvolemic hyponatremia.

Impact:

  • Vaptans offer a targeted and efficient treatment for hyponatremia, improving patient outcomes.
  • This advancement provides a much-needed therapeutic option for euvolemic hyponatremia, a condition with limited effective treatments.
  • The availability of tolvaptan in Europe marks a significant step forward in managing this common electrolyte disorder.