Chronic Obstructive Pulmonary Disease (COPD) is a public health problem responsible for high mortality rate and significant costs for society. The disease evolution is punctuated by exacerbations worsening the health state of patients.

Many guidelines of care procedures have been written but many disparities persist in medical practices.

This pilot prospective observational study is an overview of current local practices in the university health center of Grenoble Alpes and it is the first step towards developing a regional observatory in order to standardize and improve patient cares. The primary outcome is to compare the international guidelines to the local practices regarding the prescription of key treatments of exacerbation, especially antibiotics.

Inclusion Criteria:

• Patient older than 18 years (included)
• Known or suspected Chronic Obstructive Pulmonary Disease
• Admitted for COPD exacerbation in emergency department or pneumology department or intensive care unit of university health center of Grenoble Alpes during the period of data collection.

Exclusion Criteria:

• opposition to participate at the study
• Patients under the law

Every Patient who is admitted for COPD exacerbation in emergency department or pneumology department or intensive care unit of university health center of Grenoble Alpes during the period of data collection.