Final answer:
The 'target sign' seen on abdominal ultrasound in the RLQ of a 7-month-old refers to a distinct appearance of the intestines, characterized by two concentric circles. This finding is associated with a condition called intussusception, which causes a blockage when one segment of the intestine folds into another. An abdominal ultrasound can help diagnose intussusception by identifying the 'target sign.'
Step-by-step explanation:
The 'target sign' seen on abdominal ultrasound in the right lower quadrant (RLQ) of a 7-month-old refers to a distinct appearance of the intestines. It is characterized by the presence of two concentric circles, with a hypoechoic (dark) inner ring and a hyperechoic (bright) outer ring. This pattern can be seen in conditions such as intussusception, where one segment of the intestine telescopes into the adjacent segment.
Intussusception occurs when the bowel folds in on itself, causing a blockage. It is a medical emergency that often presents with symptoms like abdominal pain, vomiting, and the passage of red, currant jelly-like stool. The 'target sign' on abdominal ultrasound is a classic finding that helps diagnose intussusception in infants.
If a 7-month-old is showing signs of abdominal pain and other symptoms like vomiting, an abdominal ultrasound can be performed to examine the bowels and look for the presence of the 'target sign' as an indication of intussusception.