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Related Concept Videos

Other Pulmonary Disorders01:17

Other Pulmonary Disorders

1.8K
Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
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Asthma-I: Introduction01:29

Asthma-I: Introduction

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Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
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Inhaled Medications01:23

Inhaled Medications

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Inhaled medications are crucial for managing chronic obstructive pulmonary disease (COPD) and asthma. They are essential for effective treatment and control, ensuring optimal respiratory health and well-being. Inhaled medication delivers drugs directly to the lungs, providing a rapid onset of action and reducing systemic side effects compared to oral or injectable medications. Three primary types of inhalation devices are used to administer these medications: nebulizers, metered-dose inhalers...
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Microbiota of the Respiratory Tract01:29

Microbiota of the Respiratory Tract

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The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more...
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Asthma I: Introduction01:28

Asthma I: Introduction

112
Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...
112
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features01:24

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

40
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

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Culturing of Human Nasal Epithelial Cells at the Air Liquid Interface
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Inhaled particles and respiratory disease

J E Salvaggio1

  • 1Tulane University Medical Center, New Orleans, LA 70112.

The Journal of Allergy and Clinical Immunology
|August 1, 1994
PubMed
Summary

Inhaled particles are crucial in lung diseases, acting as sensitizers, causing inflammation, and even carrying infections. Understanding their deposition and clearance is key to addressing various respiratory illnesses.

Area of Science:

  • Environmental Health
  • Pulmonary Medicine
  • Toxicology

Background:

  • Inhaled particles are ubiquitous environmental exposures.
  • Particulate matter is linked to numerous human health conditions.
  • The mechanisms by which particles affect lung health are complex.

Purpose of the Study:

  • To review the significance of inhaled particles in human disease.
  • To highlight the multifaceted roles of particulate agents in respiratory pathology.
  • To emphasize the importance of understanding particle deposition and clearance.

Main Methods:

  • Literature review and synthesis of existing knowledge.
  • Discussion of particle properties and their biological effects.
  • Categorization of particle-induced lung conditions.

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Dry Powder and Nebulized Aerosol Inhalation of Pharmaceuticals Delivered to Mice Using a Nose-only Exposure System
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Main Results:

  • Inhaled particles act as sensitizers through allergen content.
  • Particles cause lung inflammation via immunotoxic properties.
  • Antigens and adjuvant-like materials in particles induce alveolitis.
  • Particles can function as infectious agents.

Conclusions:

  • Particulate agents contribute to allergic, infectious, and industrial lung diseases.
  • Building-related illnesses can be associated with inhaled particles.
  • Understanding particle interactions is vital for preventing and managing lung diseases.