The study of allergic laryngitis using an environmental challenge chamber

The study of allergic laryngitis using an environmental challenge chamber - The study of allergic laryngitis

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000015667

Enrollment

Registered

2014-11-11

Start date

2013-05-10

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

Allergic laryngitis

Interventions

Cedar pollen Cypress pollen Cedar pollen with nasal plug control with nasal plug

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: a history of rhinitis for at least 2 consecutive cedar and cypress pollen seasons and met the following inclusion criteria: a serum both cedar and cypress pollen-specific IgE score >2 in a CAP-radioallergosorbent test

Exclusion criteria

Exclusion criteria: nasal diseases including AR induced by other allergens, asthma, cough variant asthma, gastroesophageal reflux disease, post nasal discharge, history of having a cold within 2 weeks, use of antiallergic drugs within 4 weeks before each study, abnormal patients in respiratory function test, patients who are sensitive in the larynx before the study, women who were pregnant or planned to become pregnant during the study period and breastfeeding women.

Design outcomes

Primary

Measure	Time frame
laryngeal symptoms score	—

Countries

Japan

Contacts

Public ContactTakeshi Suzuki

University of Chiba Otolaryngology

ttn3hyi@yahoo.co.jp+81432227171

Outcome results

None listed

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