NCT03917485

Bio Metrology of Nonfibrous Mineral Particles in Bronchoalveolar Lavage Fluids

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 105 (actual)
• Sponsor: Centre Hospitalier Intercommunal Creteil · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

The main purpose of this study is to update the pulmonary retention values of non-fibrous mineral particles in the general population. This study will provide reference values for the interpretation and diagnosis of the cause of certain respiratory diseases potentially related to mineral particles.

Detailed description

Some non-fibrous mineral particles are responsible for respiratory or systemic diseases, most often of occupational origin. Their use concerns multiple professional sectors. The bio metrology of these particles, namely their quantification in a biological medium requires reference values. These are essential for clinicians to interpret pulmonary retention in patients who may have been exposed professionally or environmentally to non-fibrous mineral particles. A comparative study conducted in 2015 by lafp showed an increase in the particulate load of nonfibrous mineral particles, including titanium, in lung parenchyma samples over time. Bronchoalveolar lavage fluid is typically considered to be representative of the lung for the analysis of nonfibrous mineral particles. The thresholds currently used for the bio metrology of nonfibrous mineral particles in bronchoalveolar lavage fluid samples are based on reference values established more than 20 years ago. It is therefore appropriate to update these reference values by establishing a new control population from the analysis of bronchoalveolar lavage fluid from subjects not exposed to the non-fibrous mineral particles in a professional or environmental manner.

Conditions

• Occupational Exposure

Timeline

• Start date: 2018-12-05
• Primary completion: 2023-06-02
• Completion: 2023-06-02
• First posted: 2019-04-17
• Last updated: 2023-09-06

Locations

1 site across 1 country: France