Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen

Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen

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,...

Lung Capacity

Lung Capacity

The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures.

Respiratory Capacities

Respiratory Capacities

Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
The Functional Residual Capacity (FRC) represents the air in the...

Respiratory Volumes and Capacities I

Respiratory Volumes and Capacities I

Assessing the respiratory rate and rhythm for a complete minute is crucial for evaluating the breathing pattern. Even a minor increase in the patient's average respiratory rate, by as little as three to five breaths per minute, is an early and vital indicator of respiratory distress. Patients with a respiratory rate exceeding twenty-four breaths per minute require close monitoring to determine the physiological alterations. This careful observation is essential for prompt recognition and...

Physiological Control of Respiration

Physiological Control of Respiration

Introduction
Breathing, a seemingly passive process, is regulated by the respiratory center in the brainstem. This center coordinates the involuntary control of respirations, which means it occurs without conscious effort, ensuring a smooth and uninterrupted pattern.
Regulation of Ventilation
The body maintains ventilation by monitoring levels of carbon dioxide (CO2), oxygen (O2), and hydrogen ion concentration (pH) in the arterial blood. Among these factors, the level of CO2 plays a crucial...

Factors Affecting Pulmonary Ventilation

Factors Affecting Pulmonary Ventilation

Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Occupational health surveillance of compressed air workers: a scoping review.

Occupational medicine (Oxford, England)·2026

Same author

Medical care in submarine accidents.

Critical care (London, England)·2026

Same author

Reply to Letter to the Editor "Lung cancer detection by electronic nose analysis of exhaled breath: a multi-center prospective external validation study" by Liu et al., G. Rocco, and Szarpak et al.

Annals of oncology : official journal of the European Society for Medical Oncology·2025

Same author

Lung cancer detection by electronic nose analysis of exhaled breath: a multicentre prospective external validation study.

Annals of oncology : official journal of the European Society for Medical Oncology·2025

Same author

Recommendations on scuba diving in Birt-Hogg-Dubé syndrome.

Expert review of respiratory medicine·2023

Same author

Frostbite: a treatment guideline for prehospital treatment in a military environment.

BMJ military health·2023

Search research articles

Related Experiment Video

Updated: May 21, 2026

Dual Test Gas Pulmonary Diffusing Capacity Measurement During Exercise in Humans Using the Single-Breath Method

Dual Test Gas Pulmonary Diffusing Capacity Measurement During Exercise in Humans Using the Single-Breath Method

Published on: February 2, 2024

Lung function before and after oxygen diving: a randomized crossover study.

P J A M van Ooij¹, R A van Hulst, A Houtkooper

¹Diving Medical Centre, Royal Netherlands Navy. Pjam.v.ooij.01@mindef.nl

Undersea & Hyperbaric Medicine : Journal of the Undersea and Hyperbaric Medical Society, Inc

|June 8, 2012

Summary

This summary is machine-generated.

A three-hour oxygen dive did not cause significant lung function changes compared to an air dive. This suggests that pulmonary oxygen toxicity (POT) was not detected, and the study could not compare the sensitivity of diffusing capacity for nitric oxide (DL(NO)) versus carbon monoxide (DL(CO)) for POT monitoring.

More Related Videos

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise

Published on: February 20, 2017

Related Experiment Videos

Last Updated: May 21, 2026

Dual Test Gas Pulmonary Diffusing Capacity Measurement During Exercise in Humans Using the Single-Breath Method

Dual Test Gas Pulmonary Diffusing Capacity Measurement During Exercise in Humans Using the Single-Breath Method

Published on: February 2, 2024

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise

Assessment of Pulmonary Capillary Blood Volume, Membrane Diffusing Capacity, and Intrapulmonary Arteriovenous Anastomoses During Exercise

Published on: February 20, 2017

Area of Science:

Physiology
Diving Medicine
Pulmonary Medicine

Background:

Breathing hyperbaric oxygen can lead to pulmonary oxygen toxicity (POT).
Diffusing capacity for carbon monoxide (DL(CO)) is a potential indicator of POT.
Diffusing capacity for nitric oxide (DL(NO)) may offer more specific POT detection.

Purpose of the Study:

To compare lung function changes after oxygen versus air dives.
To evaluate DL(NO) and DL(CO) as indicators of POT.
To test the hypothesis that DL(NO) is more sensitive than DL(CO) for detecting POT.

Main Methods:

Eleven healthy male divers participated in two 3-hour immersed dives to 150 kPa.
Divers randomly breathed either 100% oxygen or air during the dives.
Lung function tests including vital capacity (VC), DL(NO), and DL(CO) were measured repeatedly over 26 hours.

Main Results:

No significant changes in DL(CO), DL(NO), or other spirometric parameters were observed after either oxygen or air dives.
Lung function remained comparable between the oxygen and air dive conditions.

Conclusions:

A single 3-hour oxygen dive at 150 kPa did not induce detectable signs of pulmonary oxygen toxicity (POT).
Lung function responses to oxygen and air dives under these conditions were similar.
The hypothesis regarding DL(NO) sensitivity could not be tested due to the absence of POT indicators.