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Related Concept Videos

Chronic Obstructive Pulmonary Disease II: Emphysema01:23

Chronic Obstructive Pulmonary Disease II: Emphysema

Emphysema, a major phenotype of chronic obstructive pulmonary disease (COPD), is characterized by irreversible destruction of alveolar walls and permanent enlargement of distal airspaces. Unlike chronic bronchitis, which primarily affects the airways, emphysema predominantly involves the lung parenchyma, where structural damage leads to airflow limitation.PathophysiologyIt most commonly results from prolonged exposure to cigarette smoke and other toxic gases, particularly cigarette smoke.
Chronic Obstructive Pulmonary Disease IV: Clinical Manifestations01:19

Chronic Obstructive Pulmonary Disease IV: Clinical Manifestations

Chronic Obstructive Pulmonary Disease, or COPD, is a long-term condition marked by persistent and only partially reversible airflow limitation. It involves two overlapping conditions—chronic bronchitis and emphysema—which often co-appear but differ in dominant symptoms and underlying mechanisms.Chronic Bronchitis FeaturesChronic bronchitis presents with a persistent productive cough and thick, sometimes purulent mucus due to airway inflammation, enlarged mucus glands, and goblet cell...
Chronic Obstructive Pulmonary Disease I: Introduction01:23

Chronic Obstructive Pulmonary Disease I: Introduction

Chronic obstructive pulmonary disease is a common, preventable, and treatable respiratory disorder characterized by persistent symptoms and progressive airflow limitation. This limitation results from a combination of small-airway disease (obstructive bronchiolitis) and parenchymal destruction (emphysema), both driven by chronic inflammation from exposure to harmful particles or gases.The disease includes two main pathological entities: emphysema, marked by destruction of alveolar walls and...
Chronic Obstructive Pulmonary Disease01:24

Chronic Obstructive Pulmonary Disease

COPD is defined as a heterogeneous lung condition marked by persistent respiratory symptoms such as dyspnea, cough, and sputum production, caused by abnormalities in the airways that cause airflow obstruction.
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies

Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
Medical History
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features01:24

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...

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Related Experiment Video

Updated: Jun 11, 2026

Alternative Therapy for Acute Exacerbation of Chronic Obstructive Pulmonary Disease: Moving Cupping Along Meridians
04:03

Alternative Therapy for Acute Exacerbation of Chronic Obstructive Pulmonary Disease: Moving Cupping Along Meridians

Published on: September 27, 2024

Emphysema Phenotype and 1‑Year Readmission Risk After Acute Exacerbation of COPD: A Real-World Study Using Propensity

Chengfeng Fu1,2, Yanling Wu1, Aixia Huang1

  • 1Respiratory and Critical Care Medicine, The Second People's Hospital of Banan District, Chongqing, 400054, People's Republic of China.

International Journal of Chronic Obstructive Pulmonary Disease
|June 10, 2026
PubMed
Summary
This summary is machine-generated.

Patients with emphysema phenotype face higher readmission risks following acute exacerbation of chronic obstructive pulmonary disease (AECOPD). This finding may help stratify COPD patients and personalize treatment strategies.

Keywords:
AECOPDemphysemapropensity score matchingreadmission

Related Experiment Videos

Last Updated: Jun 11, 2026

Alternative Therapy for Acute Exacerbation of Chronic Obstructive Pulmonary Disease: Moving Cupping Along Meridians
04:03

Alternative Therapy for Acute Exacerbation of Chronic Obstructive Pulmonary Disease: Moving Cupping Along Meridians

Published on: September 27, 2024

Area of Science:

  • Pulmonary Medicine
  • Respiratory Health
  • Clinical Epidemiology

Background:

  • The link between emphysema phenotype and readmission rates after acute exacerbation of chronic obstructive pulmonary disease (AECOPD) requires clarification.
  • Real-world data is crucial for understanding this association under controlled conditions.

Purpose of the Study:

  • To investigate the association between emphysema phenotype and 1-year readmission risk post-AECOPD.
  • To apply rigorous statistical methods for confounding control in evaluating this association.

Main Methods:

  • Retrospective cohort study of patients hospitalized for AECOPD in 2023.
  • Emphysema diagnosis via chest CT; outcome measured as 1-year acute exacerbation-related readmission.
  • Propensity score matching (PSM), multiple-weighting, doubly robust analysis, Schoenfeld residuals test, Kaplan-Meier curves, and subgroup analyses were employed.

Main Results:

  • Emphysema was significantly associated with increased 1-year readmission risk (adjusted HR=1.64, PSM HR=1.81).
  • Consistent findings across weighting methods; Kaplan-Meier curves indicated lower readmission-free survival in the emphysema group.
  • Subgroup analysis highlighted a stronger association in patients not using inhaled corticosteroids.

Conclusions:

  • The emphysema phenotype is linked to a higher risk of 1-year readmission following AECOPD.
  • Identifying the emphysema phenotype could enhance risk stratification and guide personalized COPD management.
  • Findings warrant cautious interpretation, emphasizing the need for further clinical validation.