What symptom could indicate mechanical bowel obstruction specifically?

A distended abdomen is a classic symptom of mechanical bowel obstruction. This condition occurs when there is a physical blockage preventing the normal passage of contents through the intestines. As the bowel becomes obstructed, gas and fluids can accumulate, leading to an increase in pressure within the intestinal lumen. This buildup results in abdominal distension, which is often accompanied by discomfort or pain.

While decreased appetite, nausea, and rapid breathing may also arise in a variety of gastrointestinal issues, they are not specific indicators of mechanical bowel obstruction. In this context, distension is directly correlated with the obstruction causing a notable physical change in the abdomen, thereby making it a more distinguishing symptom of this particular condition.