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Related Concept Videos

Administering Oxygen by Nasal Cannula01:29

Administering Oxygen by Nasal Cannula

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Oxygen therapy is critical to patient care, especially for those struggling with respiratory issues. This intervention increases the oxygen concentration in the lungs, enhancing the amount of oxygen transported to the body's tissues. One standard method of delivering supplemental oxygen is through a nasal cannula, a non-invasive device that provides low to medium oxygen concentrations.
Nasal Cannulas
A nasal cannula is a lightweight tube split into two prongs placed in the nostrils,...
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Oxygen Delivering System I: Nasal Cannula and Face Mask01:26

Oxygen Delivering System I: Nasal Cannula and Face Mask

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The human body requires oxygen to function, and when the natural process of respiration is hindered, external devices, including the following, are needed to help deliver this vital gas.
Nasal Cannula
A nasal cannula is a lightweight tube split at one end into two prongs and placed in the nostrils. It is typically used to deliver low to medium levels of oxygen.
Suggested flow rate: The suggested flow rate for a nasal cannula typically ranges between 1 and 6 L/min.
Oxygen percentage setting:...
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Nose and Nasal Cavity01:24

Nose and Nasal Cavity

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The nose is composed of an observable exterior segment (external nose) and an internal segment within the skull known as the nasal cavity (internal nose). The external nose, visible on the face, consists of a framework of bone and hyaline cartilage enveloped in skin and muscle and lined with a mucous membrane. This structure is supported by the frontal bone, nasal bones, and maxillary bone and is supplemented by a cartilaginous framework comprising the septal nasal cartilage, lateral nasal...
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Oxygen Transport in the Blood01:27

Oxygen Transport in the Blood

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Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
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Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen01:16

Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen

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Oxygen therapy is a pivotal aspect of medical care, particularly for patients with respiratory ailments. Two prominent oxygen-delivering systems include the Venturi mask and the transtracheal oxygen catheter.
Venturi Mask
The Venturi mask, named after the Venturi effect, is designed to deliver precise oxygen concentrations. It consists of a large tube with an oxygen inlet that narrows down, causing a pressure drop that pulls air in through adjustable side ports. The mask is a lightweight,...
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Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

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Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
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Related Experiment Video

Updated: Feb 15, 2026

Novel Methods for Intranasal Administration Under Inhalation Anesthesia to Evaluate Nose-to-Brain Drug Delivery
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[Can we not do without oxygen administration through a nasal cannula?]

Y M Smulders1, J G van den Aardweg

  • 1VUmc, afd. Interne Geneeskunde, Amsterdam.

Nederlands Tijdschrift Voor Geneeskunde
|February 3, 2018
PubMed
Summary

Nasal cannulae are widely used but may cause discomfort and are unlikely to prevent severe hypoxemia. They are often used unnecessarily when oxygen saturation is already adequate.

Area of Science:

  • Clinical Medicine
  • Respiratory Care

Background:

  • Nasal cannulae are frequently used for oxygen administration in clinical settings.
  • Patient discomfort is a known issue associated with nasal cannula use.

Purpose of the Study:

  • To evaluate the efficacy and appropriate use of nasal cannulae in oxygen therapy.
  • To assess the impact of nasal cannulae on patient comfort and oxygenation levels.

Main Methods:

  • Review of clinical practices regarding nasal cannula application.
  • Analysis of patient outcomes related to oxygen saturation and reported dyspnea.

Main Results:

  • Nasal cannulae may offer limited improvement in oxygen uptake.
  • Severe hypoxemia is unlikely to be prevented by nasal cannulae.

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  • Cannulae are often employed when arterial oxygen saturation is already sufficient (≥ 90%).

    • Conclusions:

    • The routine use of nasal cannulae may not always be clinically indicated or effective.
    • Current application practices may not align with patient needs for oxygenation or dyspnea relief.