Skip to content

The characteristics of patients and breathing causing dynamic pulmonary hyperinflation, a factor in dyspnea in chronic obstructive pulmonary disease; a retrospective study.

The characteristics of patients and breathing causing dynamic pulmonary hyperinflation, a factor in dyspnea in chronic obstructive pulmonary disease; a retrospective study. - The characteristics of patients and breathing causing dynamic pulmonary hyperinflation.

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
JPRN
Registry ID
JPRN-UMIN000048373
Enrollment
174
Registered
2022-08-01
Start date
2022-08-24
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

chronic obstructive pulmonary disease

Interventions

None listed

Sponsors

Nagoya University
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: COPD patients Patients aged 20 years or older diagnosed with chronic obstructive pulmonary disease (Guidelines for the Diagnosis and Treatment of COPD, 4th Edition, Japanese Respiratory Society) Patients who visited Shinshu University Hospital for diagnosis and treatment of COPD. Patients who have given written consent for participation and enrollment in clinical research. Healthy volunteers Healthy subjects over 18 years of age without respiratory disease or respiratory dysfunction. Outpatients with diseases other than COPD, such as sleep apnea syndrome, who has normal respiratory function. Persons who have given written consent for participation and enrollment in the clinical study.

Exclusion criteria

Exclusion criteria: Persons with heart failure. Patients with exacerbations or respiratory infections within 3 months. Patients with serious cardiac disease or arrhythmia. Patients who have difficulty in walking due to motor or cognitive dysfunction. Patients on long-term oxygen therapy.

Design outcomes

Primary

MeasureTime frame
The decrease of the inspiratory capacity after 20, 30, and 40 bpm of hyperventilations relative to the inspiratory capacity at rest, as a index of dynamic pulmonary hyperinflation.

Countries

Japan

Contacts

Public ContactShohei Kawachi

Nagoya University Department of Integrated Health Sciences Nagoya University Graduate School of Medicine

kawachi@met.nagoya-u.ac.jp052-719-1365

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026