Dahl's sign
Dahl's Sign
Dahl's sign (/dɑːl/; named after the American physician, Dr. Lowell M. Dahl) is a clinical sign in medicine that indicates the presence of chronic obstructive pulmonary disease (COPD). It is characterized by the presence of bruising or ecchymosis on the posterior aspect of the chest wall, typically in patients with severe emphysema.
Etymology
The term "Dahl's sign" is derived from the name of Dr. Lowell M. Dahl, an American physician who first described the sign in patients with emphysema.
Pronunciation
The correct pronunciation of Dahl's sign is /dɑːl/.
Related Terms
- Chronic obstructive pulmonary disease (COPD): A type of obstructive lung disease characterized by long-term breathing problems and poor airflow.
- Emphysema: A type of COPD involving damage to the air sacs (alveoli) in the lungs.
- Ecchymosis: The medical term for a bruise, or discoloration caused by bleeding underneath the skin.
- Clinical sign: Observable evidence of medical condition, as opposed to symptoms which are felt by the patient.
See Also
External links
- Medical encyclopedia article on Dahl's sign
- Wikipedia's article - Dahl's sign
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