Final answer:
Strangulated hernias are those which greatly reduce the blood supply to the hernia contents, leading to a potential medical emergency.
Step-by-step explanation:
Hernias that significantly reduce the blood supply to the hernia contents are said to be strangulated hernias. This is a serious condition, as the lack of blood supply (ischemia) can lead to tissue death (necrosis). A hernia becomes strangulated when it is so tightly trapped outside its normal position that blood flow is cut off. This condition requires immediate medical attention to prevent further complications. A strangulated hernia occurs when the hernia contents are ischemic due to a compromised blood supply. This phenomenon occurs most commonly when there is a small opening in the musculature and a significant quantity of contents within the hernia itself.