Hoover's sign in
pulmonology is one of two signs named for
Charles Franklin Hoover.
It refers to inward movement of the lower
rib cage
The rib cage, as an enclosure that comprises the ribs, vertebral column and sternum in the thorax of most vertebrates, protects vital organs such as the heart, lungs and great vessels.
The sternum, together known as the thoracic cage, is a sem ...
during inspiration,
- instead of outward as is normal - implying a flat, but functioning, diaphragm, often associated with
COPD
Chronic obstructive pulmonary disease (COPD) is a type of progressive lung disease characterized by long-term respiratory symptoms and airflow limitation. The main symptoms include shortness of breath and a cough, which may or may not produce ...
.
COPD, and more specifically emphysema, often lead to hyperexpansion of the lungs due to air trapping. The resulting flattened diaphragm contracts downwards on inspiration, thereby paradoxically pulling the inferior ribs inwards with its movement.
See also
*
Hoover's sign (leg paresis)
References
{{Eponymous medical signs for respiratory system
Physical examination