Interventional study that aims to identify the airflow obstractive area of obstructive ventilatory impairment by forced expiration 3D-CT

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCT1050260014

Enrollment

Registered

2026-04-08

Start date

2026-04-08

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 or Bronchial Asthma obstructive ventilatory defect

Interventions

CT imaging while instructing the participant to perform maximal forced expiration.

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Aged 20 years or older. Understand this study and provide written informed consent. Diagnosed with bronchial asthma or chronic obstructive pulmonary disease. At the time of examination, feeling no change in physical condition, without dyspnea at rest by regular treatment and SpO2 95 % over at rest (regardless of the use of home oxygen therapy).

Exclusion criteria

Exclusion criteria: Unable to maintain a supine resting position for more than 10 minutes. Unable to sustain maximal forced expiration for more than 3 seconds. Pregnant or possibly pregnant. Any other reason deemed inappropriate for study participation by the treating physician.

Design outcomes

Primary

Measure	Time frame
To identify the airflow obstractive area of obstructive ventilatory impairment	—

Secondary

Measure	Time frame
To analyze the mechanism of obstructive ventilatory impairment by comparison 3D-CT data with pulmonary function tests data.	—

Contacts

Public ContactNegi Yoshiki

Hyogo Medical University

ynegi@hyo-med.ac.jp+81-798-45-6596

Outcome results

None listed

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