Related Experiment Video
Updated: Jun 28, 2026

Retinal Vascular Reactivity as Assessed by Optical Coherence Tomography Angiography
Published on: March 26, 2020
Breathlessness rating type influences respiratory behavior during hypercapnia in the rebreathing test
Li Wan1, Ilse Van Diest, Steven De Peuter
1Department of Psychology, Tiensestraat 102, B-3000 Leuven, Belgium. li.wan@psy.kuleuven.be
Objective:
The online rating of perceived breathlessness in a rebreathing test (RT) is a new and powerful technique to analyze the psychological and physiological process related to the mechanisms of breathlessness. The aim of the present study was to assess the influence of rating type on respiratory sensation and behavior during repeated hypercapnic exposures.
Methods:
Sixty-one healthy women performed three rebreathing trials. Half of them were auditorily cued to rate breathlessness intensity every 12 s (CR, n=30), the other half was instructed to rate breathlessness each time a change in breathlessness intensity was perceived (UCR, n=31). The ventilatory response was assessed simultaneously.
Results:
The CR group yielded an earlier threshold in tidal volume (V(T)) than the UCR group. Only in the UCR group did changes occur across rebreathing trials: the V(T) threshold decreased, the respiratory rate (RR) threshold increased, and the sensitivity of the RR increased.
Conclusions:
The type of breathlessness rating influences respiratory behavior in the RT. The short-interval cued rating seems to be the best option for a standardized application of this test in research on panic disorder.
More Related Videos
08:34Investigation into Deep Breathing through Measurement of Ventilatory Parameters and Observation of Breathing Patterns
Published on: September 16, 2019
08:44Dual Test Gas Pulmonary Diffusing Capacity Measurement During Exercise in Humans Using the Single-Breath Method
Published on: February 2, 2024
Related Concept Videos
Alterations in Respiration II
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Hyperpnea and Hyperventilation
Acute Respiratory Failure-III
Physical Assessment of the Respiratory Tract II: Inspection
Chest Configuration
The chest configuration can...
Respiratory Volumes and Capacities I
Chemical Factors Affecting Respiration Centers
CO2 has a potent influence on respiration and is strictly regulated. Under...