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Related Concept Videos

Administering Oxygen by Mask01:30

Administering Oxygen by Mask

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Administering Oxygen by Mask
Administering oxygen by mask is a common nursing intervention that provides supplemental oxygen to patients with respiratory distress or chronic lung conditions. This procedure involves delivering oxygen at a specified rate through a face mask connected to an oxygen source.
Equipment
The equipment necessary for this procedure includes:
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Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

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Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
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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:...
644
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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Assessment of Ventilation I: Respiratory Rate01:20

Assessment of Ventilation I: Respiratory Rate

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Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
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Administering Oxygen by Nasal Cannula01:29

Administering Oxygen by Nasal Cannula

1.1K
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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Updated: Sep 20, 2025

Retinal Vascular Reactivity as Assessed by Optical Coherence Tomography Angiography
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Time to adequate preoxygenation when using flush rate oxygen.

Alec J Bunting1, Brian E Driver1, Andrew M Pearson1

  • 1Department of Emergency Medicine, Hennepin County Medical Center, Minneapolis, MN 55404, USA; Department of Emergency Medicine, University of Minnesota Medical School, Minneapolis, MN 55455, USA.

The American Journal of Emergency Medicine
|May 24, 2025
PubMed
Summary
This summary is machine-generated.

Achieving adequate preoxygenation with a non-rebreather (NRB) mask at flush rate oxygen takes a median of 90 seconds. This study suggests 3 minutes is a reasonable target time for effective preoxygenation in emergency airway management.

Keywords:
AirwayCritical careEnd tidal oxygenPreoxygenationResusitation

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Area of Science:

  • Emergency Medicine
  • Respiratory Physiology

Background:

  • Non-rebreather (NRB) mask preoxygenation at maximal flow rate is common in emergency airway management.
  • Current guidance for 3-minute preoxygenation is based on devices not typical in emergency settings.

Purpose of the Study:

  • To determine the median time to adequate preoxygenation using an NRB mask with flush rate oxygen.
  • To evaluate the efficacy of NRB mask preoxygenation in a simulated emergency setting.

Main Methods:

  • Healthy volunteers underwent 5-minute preoxygenation trials with an NRB mask and flush rate oxygen.
  • End-tidal oxygen (EtO2) was measured every 15 seconds, with adequate preoxygenation defined as EtO2 ≥ 85%.

Main Results:

  • The median time to achieve an EtO2 of 85% was 90 seconds (IQR 60-135s).
  • All 50 participants achieved EtO2 > 80%, with a median maximum EtO2 of 87%.
  • At 3 minutes, 86% of participants reached adequate preoxygenation levels.

Conclusions:

  • The median time to adequate preoxygenation using an NRB mask with flush rate oxygen is 90 seconds.
  • 86% of healthy participants achieved adequate preoxygenation by 3 minutes.
  • Three minutes appears to be a reasonable preoxygenation target time with this method.