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The continuous diaphragm sign is a radiological finding seen on chest X-rays that indicates the presence of gas within the thoracic cavity, specifically in the mediastinum (pneumomediastinum) [1], the peritoneal cavity (pneumoperitoneum) or pericardium (pneumopericardium) [2]. This sign is characterized by the uninterrupted visualization of the ...
It's when the zone of apposition ( the portion of the diaphragm in contact with the parietal pleura during expiration in the base of the pleural cavity') is reduced by the flattening of the diaphragm during inspiration and the pressure in the last intercostal spaces changes from intra-abdominal to intra-thoracic pressure.
The chest x-ray shows hyperinflation of the lungs including prominent pulmonary vascular markings, flattening of the diaphragm, and fluid in the horizontal fissure of the right lung. Signs and symptoms
A chest radiograph with the angle parts of the ribs and some other landmarks labeled. Mediastinal structures on a chest radiograph. In the average person, the diaphragm should be intersected by the 5th to 7th anterior ribs at the mid-clavicular line, and 9 to 10 posterior ribs should be viewable on a normal PA inspiratory film.
Hoover's sign in pulmonology is one of two signs named for Charles Franklin Hoover. [1]It refers to inward movement of the lower rib cage during inspiration, [2] - instead of outward as is normal - implying a flat, but functioning, diaphragm, often associated with COPD. [3]
The cupola sign is seen on a supine chest or abdominal radiograph in the presence of pneumoperitoneum. It refers to dependent air that rises within the abdominal cavity of the supine patient to accumulate underneath the central tendon of the diaphragm in the midline. It is seen as lucency overlying the lower thoracic vertebral bodies.
A) Normal chest radiograph; B) Q fever pneumonia affecting the right lower and middle lobes. Note the loss of the normal radiographic silhouette (contour) between the affected lung and its right heart border as well as between the affected lung and its right diaphragm border. This phenomenon is called the silhouette sign: Differential diagnosis
Pneumoperitoneum is pneumatosis (abnormal presence of air or other gas) in the peritoneal cavity, a potential space within the abdominal cavity.The most common cause is a perforated abdominal organ, generally from a perforated peptic ulcer, although any part of the bowel may perforate from a benign ulcer, tumor or abdominal trauma.