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Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
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Treatment for Pulmonary Arterial Hypertension: Oxygen Therapy for Respiratory Failure01:16

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Related Experiment Video

Updated: Apr 24, 2026

Preoxygenation Techniques for Tracheal Intubation in Critically Ill Adults Utilizing Oxygen Mask and Noninvasive Ventilation
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[Oxygen in medicine - basics, applications and risks].

Daniel Franzen1,2,3, Ingo Hülter4, Alexander Turk5

  • 1Departement Innere Medizin, Pneumologie, Spital Uster AG, Uster, Schweiz.

Praxis
|April 23, 2026
PubMed
Summary

Oxygen therapy is crucial for hypoxemia but should be carefully controlled. Administering oxygen without confirmed hypoxemia risks adverse effects and offers no benefit for breathlessness alone.

Keywords:
Oxygendyspnoeahypoxaemialiquid oxygenoxygen concentrator

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Area of Science:

  • Clinical Medicine
  • Respiratory Medicine
  • Critical Care

Background:

  • Oxygen therapy is vital for hypoxemia but often misused in clinical practice.
  • Hypoxemia is the primary indication for oxygen, not dyspnea alone.
  • Improper oxygen use can lead to serious complications.

Purpose of the Study:

  • To review the physiological principles of oxygen therapy.
  • To outline indications, risks, and delivery systems for oxygen administration.
  • To discuss reimbursement considerations for primary care.

Main Methods:

  • Literature review of physiological principles.
  • Analysis of clinical guidelines and evidence for oxygen therapy indications and risks.
  • Overview of technical aspects of oxygen delivery systems.

Main Results:

  • Oxygen is essential for hypoxemia but requires controlled titration to target ranges.
  • Risks of inappropriate oxygen use include hypercapnia, vasoconstriction, and increased mortality.
  • Long-term oxygen therapy is beneficial for stable chronic hypoxemia.

Conclusions:

  • Appropriate oxygen therapy requires documented hypoxemia and controlled titration.
  • Avoiding unnecessary oxygen administration mitigates significant patient risks.
  • Understanding oxygen therapy principles is essential for primary care providers.