Final answer:
Hernias that significantly reduce the blood supply to their contents are called strangulated hernias and can lead to serious complications like hypoxia and hypovolemic shock.
Step-by-step explanation:
Hernias that significantly reduce the blood supply to the hernia contents are known as strangulated hernias. A strangulated hernia is a severe condition and represents a medical emergency because it can lead to tissue death due to lack of blood flow and oxygen (hypoxia), and can potentially result in a type of circulatory shock known as hypovolemic shock if left untreated. The affected area does not receive adequate blood through the arteries, which in severe cases, can lead to ischemia and necrosis of the entrapped tissues. Prompt diagnosis and surgical intervention are essential to restore blood flow and prevent complications.