Carnett's sign
Carnett's Sign
Carnett's sign (/kɑːrˈnɛts saɪn/) is a clinical sign in medicine that is used to differentiate between abdominal wall pain and visceral pain. It is named after the British surgeon, John Brian Carnett, who first described it in 1926.
Etymology
The term "Carnett's sign" is derived from the name of its discoverer, John Brian Carnett. The word "sign" in this context is used to denote a characteristic indication of a particular medical condition, which in this case is abdominal pain.
Procedure
To test for Carnett's sign, the patient is asked to tense their abdominal muscles, often by lifting their head and shoulders off the examination table. If the pain increases when the muscles are tensed, the pain is likely to be originating from the abdominal wall. If the pain decreases or remains unchanged, it is likely to be visceral in origin.
Clinical significance
Carnett's sign is particularly useful in the diagnosis of chronic abdominal pain, where it can help to distinguish between pain arising from the abdominal wall and pain arising from the internal organs. A positive Carnett's sign suggests that the pain is likely to be due to a problem with the abdominal wall, such as a muscle strain or hernia, rather than a problem with the internal organs.
Related terms
See also
External links
- Medical encyclopedia article on Carnett's sign
- Wikipedia's article - Carnett's sign
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