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Related Concept Videos

Disorders of Acid-Base Balance01:29

Disorders of Acid-Base Balance

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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...
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Diagnosing Acidosis and Alkalosis01:24

Diagnosing Acidosis and Alkalosis

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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...
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Acid-Base Balance01:25

Acid-Base Balance

2.9K
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.
When the pH of arterial blood rises above 7.45, it results in a condition called alkalosis. Conversely, a drop below 7.35 leads to...
2.9K
Respiratory Regulation of Acid-Base Balance01:18

Respiratory Regulation of Acid-Base Balance

2.0K
Respiratory compensation is a vital physiological process that stabilizes blood plasma pH by regulating the partial pressure of carbon dioxide (PCO2), a key determinant of pH levels. Most carbon dioxide in the blood dissolves and converts into carbonic acid (H2CO3). It dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3⁻). There is also an inverse relationship between PCO2​​ and pH.
When carbon dioxide levels increase in the blood, more H+ and HCO3⁻ are...
2.0K
Altered States of Awareness01:06

Altered States of Awareness

1.3K
Altered states of consciousness represent significant deviations from one's normal mental state. These deviations can range from subtle changes in awareness to profound transformations in perception, thought processes, and sensory experiences. Altered states of consciousness can be triggered by various factors, including drug use, meditation, hypnosis, illness, or even intense fatigue.
The ingestion of substances like stimulants or hallucinogens leads to chemical alterations in the brain...
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Acute Respiratory Failure-IV01:23

Acute Respiratory Failure-IV

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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...
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Correction: Altered mental status and an acid-base disturbance.

Shylaja Mani1, Gregory W Rutecki2

  • 1Department of Internal Medicine, Cleveland Clinic, Cleveland, OH, USA.

Cleveland Clinic Journal of Medicine
|March 22, 2017
PubMed
Summary
This summary is machine-generated.

This article corrects errors in a previous publication regarding osmol gap interpretation in metabolic acidosis. It clarifies how toxic ingestions can elevate the osmol gap, aiding differential diagnosis.

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Area of Science:

  • Medical Science
  • Clinical Medicine
  • Toxicology

Background:

  • Anion gap metabolic acidosis requires accurate diagnostic interpretation.
  • The osmol gap is a critical parameter in evaluating metabolic disturbances.

Purpose of the Study:

  • To correct errors in a published table and text regarding osmol gap calculations.
  • To clarify the role of the osmol gap in diagnosing multifactorial anion gap metabolic acidosis.

Main Methods:

  • Review and correction of Table 2 from a prior publication.
  • Revision of specific sentences within the text to improve clarity on osmol gap interpretation.

Main Results:

  • Identified and corrected two errors in the original Table 2.
  • Revised text emphasizes the osmol gap's utility in identifying toxic ingestions.

Conclusions:

  • Accurate osmol gap interpretation is crucial for diagnosing metabolic acidosis.
  • The osmol gap is increasingly valuable in the differential diagnosis of elevated anion gap metabolic acidosis due to toxic ingestions.