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Related Concept Videos

Asthma III: Clinical Manifestations01:13

Asthma III: Clinical Manifestations

Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...
Asthma I: Introduction01:28

Asthma I: Introduction

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...
Asthma-IV: Diagnostic and Management01:30

Asthma-IV: Diagnostic and Management

The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
Clinical Assessment for Asthma:
This is the first step in diagnosing and managing asthma. It includes:
Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture01:26

Sputum Studies I: Gram Stain, cytology, and Acid-fast smear and culture

Sputum studies are a critical part of diagnosing and treating numerous respiratory conditions. These studies involve obtaining sputum samples for analysis to identify pathogenic organisms and assess the presence of abnormal cells indicative of malignant conditions. This lesson will delve into three fundamental sputum studies: Gram Stain, Cytology, and Acid-fast Smear and Culture.
Gram Stain
The Gram Stain is an integral part of sputum studies. It involves the staining of sputum, which permits...
Asthma-I: Introduction01:29

Asthma-I: Introduction

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...
Antiasthma Drugs: β2-Adrenoceptor Agonists01:25

Antiasthma Drugs: β2-Adrenoceptor Agonists

Bronchodilators are critical in managing asthma, a chronic respiratory condition characterized by airway constriction due to inflammation and hyper-reactivity. Specifically, bronchodilators ease this constriction by relaxing the bronchial muscles, facilitating easier breathing.
One class of bronchodilators includes β2-adrenoceptor agonists. These agents target the β2-adrenoceptors located on bronchial smooth muscle cells. By stimulating these receptors, β2-agonists induce relaxation in these...

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Related Experiment Video

Updated: May 19, 2026

Methodology for Sputum Induction and Laboratory Processing
13:28

Methodology for Sputum Induction and Laboratory Processing

Published on: December 17, 2017

Asthma biomarkers in sputum.

Joseph D Spahn1

  • 1Ira J. and Jacqueline Neimark Laboratory of Clinical Pharmacology in Pediatrics, National Jewish Health, Denver, CO 80206, USA. katialr@njhealth.org

Immunology and Allergy Clinics of North America
|August 11, 2012
PubMed
Summary

Induced sputum analysis reveals cellular and molecular details crucial for diagnosing obstructive pulmonary diseases like asthma. Targeting sputum eosinophilia significantly reduces asthma exacerbations compared to symptom-based management.

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Area of Science:

  • Pulmonology
  • Allergy and Immunology
  • Respiratory Medicine

Background:

  • Induced sputum analysis offers insights into cellular and molecular mechanisms of obstructive pulmonary diseases.
  • Sputum eosinophils correlate with asthma severity and control levels.
  • Distinguishing asthma from COPD in fixed airflow obstruction can be challenging.

Purpose of the Study:

  • To highlight the diagnostic and prognostic value of induced sputum in obstructive pulmonary diseases.
  • To emphasize the role of sputum eosinophilia in asthma management.
  • To compare the efficacy of treating sputum eosinophilia versus symptom-based management for asthma exacerbations.

Main Methods:

  • Analysis of induced sputum for cellular and molecular markers.
  • Correlation of sputum eosinophil counts with asthma severity and control.
  • Comparative study of treatment strategies for asthma exacerbations.

Main Results:

  • Induced sputum aids in diagnosing asthma and differentiating it from COPD.
  • Sputum eosinophil levels are directly associated with asthma severity and control.
  • Treating sputum eosinophilia leads to a significant reduction in asthma exacerbations.

Conclusions:

  • Induced sputum is a valuable tool for understanding and managing asthma and other obstructive pulmonary diseases.
  • Monitoring and treating sputum eosinophilia represent a targeted approach to reducing asthma exacerbations.
  • This approach offers improved asthma control compared to traditional symptom and lung function monitoring.