Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Pulmonary Function Tests01:25

Pulmonary Function Tests

768
Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
768
Impulse01:13

Impulse

21.4K
According to Newton’s second law of motion, the rate of change of the momentum of an object is the net external force acting on it. The total change in momentum between two timepoints thus depends on both the external force acting on it and the time over which it acts. Describing this mathematically, the total change of an object’s motion is proportional to the force vector and the time over which it is applied. This product is called impulse.
Additionally, it can be shown that the...
21.4K
Impulse Response01:17

Impulse Response

730
The impulse response is the system's reaction to an input impulse. In an RC circuit, the voltage source is the input, and the capacitor's voltage is the output. The system's state and output response before and after input excitation are distinctly defined.
Kirchhoff's law forms an input signal equation, with the capacitor's current and voltage providing the output. Substituting the current and dividing by RC yields a differential equation. The output for an impulse input is the impulse...
730
Principle of Impulse and Moment01:15

Principle of Impulse and Moment

505
When one considers a rigid body undergoing a plane motion, which is essentially a blend of translational and rotational movement, the application of Newton's second law gives the formula for the translational movement of such a body. If this equation is multiplied by a time interval, dt, and then integrated over the limits of integration, it results in an equation that embodies the principle of linear impulse.
505
Impulse-Momentum Theorem00:49

Impulse-Momentum Theorem

19.0K
The total change in the motion of an object is proportional to the total force vector acting on it and the time over which it acts. This product is called impulse, a vector quantity with the same direction as the total force acting on the object.
By writing Newton's second law of motion in terms of the momentum of an object and the external force acting on it, and simultaneously using the definition of the impulse vector, it can be shown that the total impulse on an object is equal to its...
19.0K
Principle of Angular Impulse and Momentum01:23

Principle of Angular Impulse and Momentum

1.2K
The angular impulse and momentum principle provides insights into how forces applied at a distance from an object's rotational axis influence its angular velocity. It builds upon the crucial relationship between the moment of force and angular momentum. By integrating this equation, substituting the limits for the initial and final times, a comprehensive expression representing the angular impulse and momentum principle is derived.
1.2K

You might also read

Related Articles

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

Sort by
Same author

The Effectiveness of a Novel Sleep Test Based on Cardiopulmonary Coupling to Detect Obstructive Sleep Apnea: A Multicenter Prospective Study.

Nature and science of sleep·2026
Same author

Association between fluid status and small airway dysfunction in hemodialysis patients: A prospective paired study.

Respiratory physiology & neurobiology·2026
Same author

Reply to Liu et al., Zhou et al., and Dong et al.

American journal of respiratory and critical care medicine·2025
Same author

Taiwan consensus on pulmonary chronic graft-versus-host disease: A joint statement from the Taiwan Society of Blood and Marrow Transplantation (TBMT) and Taiwan Society of Pulmonary and Critical Care Medicine (TSPCCM).

British journal of haematology·2025
Same author

Response to Biologics Along a Gradient of T2 Involvement in Patients With Severe Asthma: A Data-Driven Biomarker Clustering Approach.

The journal of allergy and clinical immunology. In practice·2025
Same author

Management of COPD With Cardiovascular Risk in Asia: A Review by the Asian Pacific Society of Respirology COPD Assembly.

Respirology (Carlton, Vic.)·2025

Related Experiment Video

Updated: Jan 22, 2026

Fertility Preservation in Patients with Severe Ovarian Dysfunction
12:03

Fertility Preservation in Patients with Severe Ovarian Dysfunction

Published on: March 25, 2021

5.0K

Small Airway Dysfunction by Impulse Oscillometry in Symptomatic Patients with Preserved Pulmonary Function.

Hwa-Yen Chiu1, Yi-Han Hsiao2, Kang-Cheng Su2

  • 1Department of Chest Medicine, Taipei Veterans General Hospital, Taipei, Taiwan.

The Journal of Allergy and Clinical Immunology. in Practice
|July 13, 2019
PubMed
Summary

Impulse oscillometry (IOS) can detect small airway dysfunction (SAD) in patients with respiratory symptoms and preserved pulmonary function (PPF). IOS parameters, particularly resonant frequency (Fres), show higher sensitivity than spirometry for identifying SAD.

Keywords:
Forced expiratory flowImpulse oscillometryPreserved pulmonary functionSmall airway dysfunctionSpirometry

More Related Videos

Conducting Respiratory Oscillometry in an Outpatient Setting
14:49

Conducting Respiratory Oscillometry in an Outpatient Setting

Published on: April 8, 2022

8.4K
Label-free Neutrophil Enrichment from Patient-derived Airway Secretion Using Closed-loop Inertial Microfluidics
07:37

Label-free Neutrophil Enrichment from Patient-derived Airway Secretion Using Closed-loop Inertial Microfluidics

Published on: June 7, 2018

6.7K

Related Experiment Videos

Last Updated: Jan 22, 2026

Fertility Preservation in Patients with Severe Ovarian Dysfunction
12:03

Fertility Preservation in Patients with Severe Ovarian Dysfunction

Published on: March 25, 2021

5.0K
Conducting Respiratory Oscillometry in an Outpatient Setting
14:49

Conducting Respiratory Oscillometry in an Outpatient Setting

Published on: April 8, 2022

8.4K
Label-free Neutrophil Enrichment from Patient-derived Airway Secretion Using Closed-loop Inertial Microfluidics
07:37

Label-free Neutrophil Enrichment from Patient-derived Airway Secretion Using Closed-loop Inertial Microfluidics

Published on: June 7, 2018

6.7K

Area of Science:

  • Pulmonary Medicine
  • Respiratory Physiology
  • Diagnostic Imaging

Background:

  • Asthma and COPD involve airway inflammation and airflow limitation.
  • Early detection is challenging in patients with respiratory symptoms and preserved pulmonary function (PPF).
  • Impulse oscillometry (IOS) may offer superior sensitivity over spirometry for detecting small airway dysfunction (SAD).

Purpose of the Study:

  • To identify SAD in patients presenting with respiratory symptoms and PPF using IOS.
  • To evaluate the diagnostic performance of IOS parameters for SAD detection.

Main Methods:

  • Retrospective analysis of medical records for symptomatic patients without structural lung disease.
  • Patients underwent spirometry and IOS with bronchodilator testing.
  • Correlations between respiratory symptoms, spirometry (FEF25%-75%), and IOS parameters were assessed.

Main Results:

  • 255 out of 349 patients had PPF.
  • IOS parameters (resistance difference, reactance at 5 Hz, Fres, reactance area) correlated significantly with FEF25%-75%.
  • Fres and reactance at 5 Hz demonstrated high sensitivity and specificity for SAD; Fres was more sensitive than FEF25%-75% for SAD in PPF patients.

Conclusions:

  • SAD can be present in symptomatic patients with PPF.
  • IOS serves as a valuable tool for identifying SAD alongside spirometry.
  • IOS parameters, especially Fres, offer enhanced sensitivity for early SAD detection in this population.