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Related Concept Videos

Bronsted-Lowry Acids and Bases02:58

Bronsted-Lowry Acids and Bases

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...
Introduction to Language of Pathophysiology l01:25

Introduction to Language of Pathophysiology l

Pathophysiology investigates how biological mechanisms—typically starting at the cellular level—disrupt normal bodily functions. It bridges anatomy and physiology to explain the progression of disease. With this foundation, it is important to understand the following key terms used to describe disease processes: Diagnosis:The process of identifying a disease using clinical evaluation, including signs (objective evidence like rashes), symptoms (subjective experiences like pain), laboratory test...
Disorders of Acid-Base Balance01:29

Disorders of Acid-Base Balance

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...
Diagnosing Acidosis and Alkalosis01:24

Diagnosing Acidosis and Alkalosis

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 HCO3−  values are examined to...
Acid-Base Balance01:25

Acid-Base Balance

The human body maintains a narrow pH range regulated through acid-base balance. This balance is crucial as changes in the hydrogen ion concentration can disrupt cell membrane stability, alter protein structures, and change enzyme activities. The normal pH of arterial blood is 7.4, venous blood and interstitial fluid is 7.35, and intracellular fluid averages 7.0.
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Intravenous Endotoxin Challenge in Healthy Humans: An Experimental Platform to Investigate and Modulate Systemic Inflammation
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Acid-base pathophysiology after 130 years: confusing, irrational and controversial.

Kenrick Berend1

  • 1Department of Internal Medicine and Nephrology, St. Elisabeth Hospital, Curacao, Netherlands Antilles. kberend@sehos.an

Journal of Nephrology
|September 15, 2012
PubMed
Summary

Despite advances in acid-base physiology, confusion persists regarding acid-base balance and blood gas interpretation. This review identifies and suggests solutions for remaining controversies in acid-base disorders.

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Area of Science:

  • Physiology
  • Biochemistry
  • Medical Diagnostics

Background:

  • The study of acid-base balance has a long history, with significant progress made over 130 years.
  • Despite advancements, understanding of acid-base balance mechanisms remains incomplete.
  • Recent years have seen increased controversy in classifying and understanding acid-base derangements.

Purpose of the Study:

  • To analyze the medical literature on acid-base disorders.
  • To identify gaps in knowledge and controversial issues in acid-base assessment and management.
  • To provide suggestions for reducing confusion in the field.

Main Methods:

  • A comprehensive literature search was conducted using MEDLINE and EMBASE.
  • Internal medicine, critical care, and nephrology textbooks were reviewed.
  • Reference lists of relevant articles and texts were also searched.

Main Results:

  • Several confusing and controversial issues were identified concerning acid-base nomenclature.
  • Irrationalities in reference values, pathophysiology, and assessment of acid-base disorders were found.
  • Therapeutic controversies related to acid-base derangements were also noted.

Conclusions:

  • Significant progress in acid-base knowledge has been achieved.
  • However, numerous confusing, irrational, and controversial issues persist.
  • The study offers recommendations to clarify and resolve these ongoing debates.