1, 2 It contains all normal layers of the intestinal wall and, in approximately 50 percent of cases, contains tissue from other sites (ectopic tissue). 2 This ectopic, or heterotopic, tissue can often be the cause of complications occurring in Meckel's diverticulum. Meckel's diverticulum occurs in about 2 percent of the population, making it the most prevalent congenital abnormality of the gastrointestinal tract.
A common helium-filled latex balloon lasts from about 12 hours up to two days. However, the size, type of material, and presence of a sealant all affect the balloon's lifespan. The treatment and level of activity to which the balloon is subjected also affects how long it floats.
Experts caution that many of the earth's helium reserves could be depleted within the next 40 to 100 years. Congress ultimately voted to renew a 1996 law authorizing helium sales that would have expired this month. The medical field is one of the biggest users of liquid helium, for sure, Dr. Wicklund said. And thanks to the actions of Congress, the MRI machines can keep scanning. President Obama signed the Helium Stewardship Act of 2013 into law Oct. 2.