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

Assessment of Ventilation I: Respiratory Rate

Assessment of Ventilation I: Respiratory Rate

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:

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...

Assessment of Ventilation II: Respiratory Depth and Rhythm

Assessment of Ventilation II: Respiratory Depth and Rhythm

Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:

Respiratory Volumes and Capacities

Respiratory Volumes and Capacities

The respiratory system is responsible for the intake of oxygen and the expulsion of carbon dioxide from the body. Respiratory volumes describe the volume of air in the lungs at different phases of the respiratory cycle. Tidal volume is the air breathed in and out during normal, quiet breathing. Inspiratory reserve volume is the air that can be forcefully inspired beyond the tidal volume. In contrast, expiratory reserve volume refers to the air that can be expelled from the lungs after a normal...

Pulmonary Function Tests

Pulmonary Function Tests

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...

Pipe Flowrate Measurement

Pipe Flowrate Measurement

In pipe flow measurement, orifice, nozzle, and Venturi meters are commonly used to determine fluid flowrates by constricting the flow area, which increases fluid velocity and reduces pressure. This pressure difference, governed by Bernoulli's principle and adjusted for real-world conditions, is essential for calculating flowrate. Each meter type is suited to specific applications based on accuracy, efficiency, and compatibility with various flow conditions.
The orifice meter is a simple,...

You might also read

Related Articles

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

Sort by

Same author

Public perception of food allergy.

Environmental toxicology and pharmacology·2011

Same author

Superior clinical outcomes of inner city asthma patients treated in an allergy clinic.

Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology·2001

Same author

Public perception of food allergy.

The Journal of allergy and clinical immunology·1996

Same author

Systemic reactions to measles-mumps-rubella vaccine skin testing.

Pediatrics·1993

Same author

Food sensitivity in asthma: perception and reality.

The Journal of asthma : official journal of the Association for the Care of Asthma·1991

Same author

Training perception of acute airflow obstruction.

Annals of allergy·1990

Search research articles

Related Experiment Video

Updated: Jun 27, 2026

Quality-Controlled Sputum Analysis by Flow Cytometry

Quality-Controlled Sputum Analysis by Flow Cytometry

Published on: August 9, 2021

Comparative evaluation of five peak flow devices

L T Chiaramonte, S L Prabhu

The Journal of Allergy and Clinical Immunology

|June 1, 1982

Summary

This summary is machine-generated.

This study compared five peak flow meters, finding the new peak flow whistle (PFW) unique in its consistent performance across varying airflows. Other devices showed increased resistance at higher flows, impacting accuracy.

More Related Videos

Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults

Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults

Published on: February 9, 2022

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

Related Experiment Videos

Last Updated: Jun 27, 2026

Quality-Controlled Sputum Analysis by Flow Cytometry

Quality-Controlled Sputum Analysis by Flow Cytometry

Published on: August 9, 2021

Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults

Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults

Published on: February 9, 2022

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

Area of Science:

Pulmonary Function Testing
Medical Device Evaluation
Respiratory Mechanics

Background:

Peak expiratory flow rate (PEFR) is crucial for monitoring respiratory conditions like asthma.
Accurate measurement devices are essential for effective patient management and treatment efficacy.
Existing peak flow meters have varying performance characteristics under different flow conditions.

Purpose of the Study:

To evaluate and compare the performance of established Wright peak flow meters (WPFM) and the Vitalograph pulmonary monitor (VPM) against a newly designed peak flow whistle (PFW).
To assess device accuracy, resistance characteristics, and reproducibility under controlled laboratory conditions, including steady and transient airflow.

Main Methods:

Comparative laboratory evaluation of five devices: WPFM, pediatric WPFM, mini-WPFM (MWPFM), VPM, and PFW prototypes.
Measurement against a pneumotachygraph standard under steady and transient flow conditions.
Assessment of device resistance, calibration, reproducibility, and temperature effects.

Main Results:

All devices showed significant correlation with the pneumotachygraph standard under steady flows (p < 0.001).
The VPM exhibited waveform distortion and reduced peak flow at transient flows; all devices except PFW showed increased resistance with higher flows.
The PFW demonstrated a unique progressive decrease in resistance with increasing flow, while WPFM and pediatric WPFM showed adequate calibration corrections.

Conclusions:

The newly designed peak flow whistle (PFW) offers a distinct advantage with its consistent performance across varying airflow rates, unlike other tested devices.
Established devices like WPFM and pediatric WPFM require calibration for increasing resistance, while the VPM shows limitations with transient flows.
All evaluated devices demonstrated good reproducibility, but the PFW's unique resistance profile warrants further investigation for clinical application in respiratory monitoring.