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Related Concept Videos

Respiratory System Abnormal Finding I: Inspection and Percussion01:30

Respiratory System Abnormal Finding I: Inspection and Percussion

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Respiratory system abnormalities are a significant concern in healthcare due to their potential to indicate underlying severe conditions like Chronic Obstructive Pulmonary Disease (COPD), asthma, and pneumonia. These abnormalities can often be detected through physical examination methods like inspection and percussion.
Inspection Findings
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Imaging Studies for Cardiovascular System III: X-Ray01:20

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The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
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An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
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Respiratory System Abnormal Finding II: Palpation and Auscultation01:31

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In assessing respiratory abnormalities, palpation and auscultation are critical tools for detecting and interpreting various pathophysiological changes. These techniques provide insight into underlying disorders by evaluating tactile sensations and sounds produced by the respiratory system.
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Flail Chest-I01:24

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Overview of Flail Chest
Flail chest is a severe and potentially life-threatening condition characterized by the fracture of three or more adjacent ribs in multiple places. It is most commonly caused by direct impacts and trauma, such as motor vehicle accidents or injuries from a steering wheel impact. It can also occur due to falls in elderly individuals with osteoporosis, or assaults involving sharp objects.
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Physical Assessment of the Respiratory Tract II: Inspection01:27

Physical Assessment of the Respiratory Tract II: Inspection

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Physical assessment of the respiratory tract through inspection is a crucial step in understanding the patient's respiratory health. It provides insights into the functioning of the respiratory system, the musculoskeletal structure, and even the patient's nutritional status. This comprehensive approach involves observing several vital aspects: chest configuration, breathing patterns, respiratory rates, skin color, and use of accessory muscles.
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The chest configuration...
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Radiological Investigation I: X-ray and CT01:30

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Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and...
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Related Experiment Video

Updated: Jun 23, 2025

Point-of-Care Lung Ultrasound in Adults: Image Acquisition
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Unusual Air Crescents on Chest Radiographs.

Amanda Marlène Missi1, Denis Tack2, Nigel Howarth3

  • 1Université libre de Bruxelles (Fosfom), Brussels, Belgium.

Journal of the Belgian Society of Radiology
|June 24, 2024
PubMed
Summary
This summary is machine-generated.

The air crescent sign on chest radiographs has diverse causes beyond pulmonary aspergillosis. This study highlights four rare conditions, including esophageal bezoar and perforated emphysematous cholecystitis, expanding the differential diagnosis.

Keywords:
Air crescentchest radiographunusual aetiologies

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Area of Science:

  • Radiology
  • Pulmonology
  • Gastroenterology

Background:

  • The air crescent sign (AC) is a recognized finding on chest radiographs.
  • While pulmonary aspergillosis is the most frequent cause, other etiologies exist.

Observation:

  • This study details four uncommon causes of the air crescent sign.
  • These rare causes have not been previously documented in medical literature.

Findings:

  • The reported rare causes include esophageal bezoar, interstitial lung emphysema, central bronchial stenosis, and perforated emphysematous cholecystitis.
  • These conditions represent an expanded differential diagnosis for the air crescent sign.

Implications:

  • Broadens the differential diagnosis for the air crescent sign in radiological imaging.
  • Enhances diagnostic accuracy by considering less common etiologies.
  • Provides valuable teaching points for clinicians interpreting chest radiographs.