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Related Concept Videos

Diagnosing Acidosis and Alkalosis01:24

Diagnosing Acidosis and Alkalosis

845
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...
845
Disorders of Acid-Base Balance01:29

Disorders of Acid-Base Balance

1.6K
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...
1.6K
Acid-Base Balance01:25

Acid-Base Balance

2.0K
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...
2.0K
Acute Respiratory Failure-III01:30

Acute Respiratory Failure-III

555
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...
555
Compensation Mechanisms01:28

Compensation Mechanisms

1.7K
The human body employs intricate mechanisms to counteract changes in blood pH, preventing conditions like acidosis (pH < 7.35) and alkalosis (pH > 7.45). These compensatory responses aim to restore normal arterial blood pH by engaging respiratory or renal systems, depending on the source of the imbalance.
Respiratory Compensation
This mechanism addresses metabolic-induced pH imbalances by adjusting breathing rates. Respiratory compensation begins within minutes of detecting a pH...
1.7K
Bicarbonate-Carbonic Acid Buffer01:22

Bicarbonate-Carbonic Acid Buffer

4.6K
The carbonic acid-bicarbonate buffer system is critical for maintaining the body's pH balance. It operates on the equilibrium:
4.6K

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Related Experiment Video

Updated: Dec 2, 2025

Measurement and Analysis of Extracellular Acid Production to Determine Glycolytic Rate
06:47

Measurement and Analysis of Extracellular Acid Production to Determine Glycolytic Rate

Published on: December 12, 2015

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[Metabolic acidosis].

Anna Yamina Stumpff-Niggemann, Thorsten Feldkamp

    Deutsche Medizinische Wochenschrift (1946)
    |November 3, 2020
    PubMed
    Summary
    This summary is machine-generated.

    Accurate diagnosis of acid-base disorders is crucial for effective treatment. A structured diagnostic pathway, focusing on etiology, is essential to avoid harmful interventions like bicarbonate therapy.

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    Area of Science:

    • Clinical Medicine
    • Nephrology
    • Internal Medicine

    Background:

    • Acid-base disorders are common in clinical practice and can be life-threatening.
    • Understanding their diagnosis and treatment is vital for clinicians.
    • Treatment must target the underlying cause, not just buffer acids.

    Purpose of the Study:

    • To outline a systematic diagnostic approach for acid-base disorders.
    • To emphasize the importance of identifying the etiology.
    • To caution against indiscriminate use of bicarbonate therapy.

    Main Methods:

    • Analysis of pH to determine acidemia or alkalemia.
    • Assessment of partial pressure of carbon dioxide (pCO2) and bicarbonate (HCO3-) to identify primary disorders.
    • Evaluation of regulatory mechanisms for detecting additional disorders.
    • Calculation of anion gap and its relation to HCO3- changes for further metabolic assessment.

    Main Results:

    • Metabolic acidosis is categorized into two main types: acidosis with increased anion gap (due to acid addition) and normal anion gap (due to HCO3- loss).
    • A systematic diagnostic pathway is proposed to guide clinicians.
    • Avoidance of undirected buffering with HCO3- is recommended due to potential severe side effects.

    Conclusions:

    • A rigorous diagnostic pathway is essential for managing acid-base disorders.
    • Identifying the specific etiology is the most critical step in patient care.
    • Bicarbonate therapy should be used cautiously and only when indicated by the underlying cause.