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Related Concept Videos

Pulmonary Cycle: Exhalation01:17

Pulmonary Cycle: Exhalation

In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...
Pneumonia I: Introduction01:30

Pneumonia I: Introduction

Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
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...
The Bronchial Tree01:23

The Bronchial Tree

The human bronchi and bronchial tree play a crucial role in the respiratory system, facilitating the exchange of oxygen and carbon dioxide. Let's delve into the intricate structure and functions of these respiratory components.
The trachea, commonly known as the windpipe, is a tube that connects the larynx (voice box) to the bronchi. At a point called the carina, it bifurcates into two primary bronchi. The right primary bronchus is wider, shorter, and more vertical than the left primary...
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
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Related Experiment Video

Updated: May 25, 2026

Murine Intrapulmonary Tracheal Transplantation: A Model for Investigating Obliterative Airway Disease After Lung Transplantation
06:15

Murine Intrapulmonary Tracheal Transplantation: A Model for Investigating Obliterative Airway Disease After Lung Transplantation

Published on: November 10, 2023

[Bronchiolitis].

C Kroegel1, P Haidl, M Kohlhäufl

  • 1Medizinische Klinik I, Abt. Pneumologie & Allergologie, Friedrich-Schiller-Universität Jena. claus.kroegel@med.uni-jena.de

Pneumologie (Stuttgart, Germany)
|January 31, 2012
PubMed
Summary
This summary is machine-generated.

Diagnosing bronchiolar disorders is challenging due to varied presentations. This paper offers a structured diagnostic algorithm, incorporating clinical evaluation, imaging like high-resolution CT, and histology for accurate small airway disease identification.

Related Experiment Videos

Last Updated: May 25, 2026

Murine Intrapulmonary Tracheal Transplantation: A Model for Investigating Obliterative Airway Disease After Lung Transplantation
06:15

Murine Intrapulmonary Tracheal Transplantation: A Model for Investigating Obliterative Airway Disease After Lung Transplantation

Published on: November 10, 2023

Area of Science:

  • Pulmonology
  • Radiology
  • Pathology

Context:

  • Bronchiolar disorders present with diverse clinical and pathological features, complicating diagnosis.
  • Small airway diseases are often overlooked in the differential diagnosis of respiratory conditions.
  • Accurate diagnosis is crucial for effective management of bronchiolar diseases.

Purpose:

  • To present a clinically applicable algorithmic approach for diagnosing bronchiolar disorders.
  • To outline a systematic method for the differential diagnosis of small airway diseases.
  • To integrate clinical, functional, imaging, and histological data for improved diagnostic accuracy.

Summary:

  • Initial diagnostic steps include patient history, physical examination, chest radiography, and pulmonary function tests.
  • High-resolution CT (HR-CT) reveals characteristic patterns such as the tree-in-bud sign, ill-defined centrilobular nodules, and mosaic attenuation.
  • When HR-CT is inconclusive, histological examination is essential for definitive diagnosis of bronchiolar involvement.

Impact:

  • Provides a clear diagnostic pathway for clinicians managing patients with suspected small airway diseases.
  • Enhances the recognition and differentiation of various bronchiolar disorders.
  • Aims to improve patient outcomes through timely and accurate diagnosis.