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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...
Atelectasis II: Pathophysiology01:10

Atelectasis II: Pathophysiology

Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...
Pneumothorax-II01:27

Pneumothorax-II

Pneumothorax is a medical condition defined by the buildup of air in the pleural space between the lungs and the chest wall. This accumulation of air can lead to partial or complete lung collapse, resulting in a range of clinical manifestations. Understanding the clinical presentation and effective management strategies is crucial for healthcare professionals in providing timely and appropriate care to individuals with pneumothorax.
Clinical Manifestations:
Breathing01:05

Breathing

The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
Assessment of Respiration01:23

Assessment of Respiration

The respiratory system's basic structures and primary functions lay the foundation for nurses' comprehensive respiratory assessments. This assessment includes subjective and objective data to gauge the patient's respiratory health.
Subjective Assessment: Nurses interview the patient to gather information directly during the subjective assessment. It includes questions about the individual's medical history, medications, and symptoms, focusing on past respiratory conditions like asthma or COPD,...

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Related Experiment Video

Updated: Jul 16, 2026

Automated Measurement of Pulmonary Emphysema and Small Airway Remodeling in Cigarette Smoke-exposed Mice
10:37

Automated Measurement of Pulmonary Emphysema and Small Airway Remodeling in Cigarette Smoke-exposed Mice

Published on: January 16, 2015

Subcutaneous emphysema during restorative dentistry.

Robert J Steelman1, Phyllis W Johannes

  • 1Pediatric Critical Care Medicine and Oral and Maxillofacial Surgery, Oregon Health and Science University, Portland, Oregon 97239, USA. steelmar@ohsu.edu

International Journal of Paediatric Dentistry
|April 3, 2007
PubMed
Summary

Subcutaneous emphysema, a rare dental complication, can be mistaken for allergic reactions. This condition requires accurate diagnosis and antibiotic treatment, with observation for resolution of subcutaneous air.

More Related Videos

Lung Fixation under Constant Pressure for Evaluation of Emphysema in Mice
05:48

Lung Fixation under Constant Pressure for Evaluation of Emphysema in Mice

Published on: September 26, 2019

Related Experiment Videos

Last Updated: Jul 16, 2026

Automated Measurement of Pulmonary Emphysema and Small Airway Remodeling in Cigarette Smoke-exposed Mice
10:37

Automated Measurement of Pulmonary Emphysema and Small Airway Remodeling in Cigarette Smoke-exposed Mice

Published on: January 16, 2015

Lung Fixation under Constant Pressure for Evaluation of Emphysema in Mice
05:48

Lung Fixation under Constant Pressure for Evaluation of Emphysema in Mice

Published on: September 26, 2019

Area of Science:

  • Dental medicine
  • Oral surgery
  • Anesthesiology

Background:

  • Subcutaneous emphysema is an uncommon complication in dental procedures.
  • It can be misdiagnosed as an anaphylactic reaction to medications.
  • Early recognition is crucial for appropriate management.

Observation:

  • During dental restorative treatment, air was introduced under an operculum.
  • This led to the establishment of communication with the submandibular, sublingual spaces, and mediastinum.
  • The case highlights a specific mechanism of air introduction during dental work.

Findings:

  • The patient developed subcutaneous emphysema following dental treatment.
  • The emphysema extended from the oral cavity to the mediastinum.
  • This demonstrates a potential pathway for air dissemination during dental procedures.

Implications:

  • Accurate diagnosis of subcutaneous emphysema is essential to avoid incorrect treatment.
  • Antibiotic coverage is a key component of therapy.
  • Subcutaneous air typically resolves with observation, making it a viable management strategy.