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Related Concept Videos

Disorders of Acid-Base Balance01:29

Disorders of Acid-Base Balance

427
The human body maintains a precise pH range of arterial blood between 7.35 and 7.45. Deviations result in either acidosis (pH < 7.35) or alkalosis (pH > 7.45). These conditions are further classified as respiratory or metabolic disorders based on their underlying cause.
Respiratory Acidosis and Alkalosis
Respiratory acidosis occurs due to an increase in the partial pressure of carbon dioxide PCO2 in the blood. It often arises from shallow breathing or impaired gas exchange caused by...
427
Acute Respiratory Failure-IV01:23

Acute Respiratory Failure-IV

205
Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
205
Acute Respiratory Failure-III01:30

Acute Respiratory Failure-III

292
Hypercapnic respiratory failure, also known as Type 2 or ventilatory respiratory failure, is a severe condition characterized by the body's inability to effectively remove carbon dioxide (CO2) from the bloodstream. It leads to an arterial CO2 pressure (PaCO2) exceeding 45 mmHg and a blood pH above 7.35. This situation indicates that the body's ventilatory demand, or the ventilation needed to maintain normal PaCO2 levels, surpasses its supply or the maximum gas flow achievable without...
292
Bronsted-Lowry Acids and Bases02:58

Bronsted-Lowry Acids and Bases

93.1K
The acid-base reaction class has been studied for quite some time. In 1680, Robert Boyle reported traits of acid solutions that included their ability to dissolve many substances, to change the colors of certain natural dyes, and to lose these traits after coming in contact with alkali (base) solutions. In the eighteenth century, it was recognized that acids have a sour taste, react with limestone to liberate a gaseous substance (now known to be CO2), and interact with alkalis to form neutral...
93.1K
Diagnosing Acidosis and Alkalosis01:24

Diagnosing Acidosis and Alkalosis

487
Diagnosing acid-base imbalances involves systematically analyzing arterial blood samples, focusing on three key measurements: pH, bicarbonate (HCO3−) concentration, and carbon dioxide partial pressure (PCO2). This analysis follows a four-step process that helps identify the imbalance's underlying cause and nature.
First, the pH level is assessed to determine whether the blood pH is normal (7.35–7.45), low (acidosis), or high (alkalosis).
Next, the PCO2  and...
487
Roles of Electrolytes: Chloride and Bicarbonate01:29

Roles of Electrolytes: Chloride and Bicarbonate

343
Chloride ions contribute to the osmotic pressure gradient distinguishing the intracellular fluid (ICF) from the extracellular fluid (ECF). They counterbalance positively charged ions in the ECF and ensure its electrochemical stability. The renal system's process of chloride absorption and release generally mirrors that of sodium ions.
Conditions such as hypochloremia can arise from insufficient chloride reabsorption by the kidneys, often compounded by extended bouts of diarrhea, vomiting,...
343

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Halogenated Agent Delivery in Porcine Model of Acute Respiratory Distress Syndrome via an Intensive Care Unit Type Device
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Acid-Base Disorders in the Critically Ill Patient.

Anand Achanti1, Harold M Szerlip

  • 1Internal Medicine/Nephrology, Medical University of South Carolina, Charleston, South Carolina.

Clinical Journal of the American Society of Nephrology : CJASN
|August 23, 2022
PubMed
Summary
This summary is machine-generated.

Intensive care unit patients frequently develop acid-base disorders. A systematic approach aids in diagnosing metabolic and respiratory acidosis and alkalosis, guiding targeted treatment for better outcomes.

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Area of Science:

  • Critical Care Medicine
  • Nephrology
  • Pulmonology

Background:

  • Acid-base disorders are prevalent in intensive care units (ICUs).
  • Accurate diagnosis of simple and mixed acid-base disturbances is crucial for patient management.
  • Understanding the categories—metabolic acidosis, metabolic alkalosis, respiratory acidosis, and respiratory alkalosis—is fundamental.

Purpose of the Study:

  • To outline a systematic approach for diagnosing acid-base disorders in critically ill patients.
  • To differentiate between anion gap and non-gap metabolic acidosis.
  • To discuss the management strategies for various acid-base disturbances encountered in the ICU.

Main Methods:

  • Categorization of acid-base disorders into four main types.
  • Subdivision of metabolic acidosis into anion gap and non-gap types.
  • Review of etiologies and treatment principles for metabolic and respiratory acid-base disorders.

Main Results:

  • Anion gap acidosis, often due to sepsis or toxins, requires treatment of the underlying cause.
  • Metabolic alkalosis is common in critically ill patients, frequently linked to therapeutic interventions.
  • Respiratory disorders are managed by addressing ventilation, with permissive hypercapnia as a standard approach.

Conclusions:

  • A systematic diagnostic approach simplifies the identification of complex acid-base disorders in the ICU.
  • Treatment should focus on the underlying pathology rather than solely on pH normalization.
  • Current guidelines support specific management strategies for different acid-base disturbances, including permissive hypercapnia and avoiding bicarbonate therapy.