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- $Unique_ID{BRK01561}
- $Pretitle{}
- $Title{Do New Valves That Are Placed Inside Hearts Come From Organ Donations?}
- $Subject{heart valve replacements Circulatory System Valves Organ Donations
- surgery mechanical tissue blood flow pig pig's cow cow's replacement hearts
- Organs Donation surgeries}
- $Volume{G-3}
- $Log{}
-
- Copyright (c) 1991-92,1993 Tribune Media Services, Inc.
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- Do New Valves That Are Placed Inside Hearts Come From Organ Donations?
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- QUESTION: Can you please tell me where they get all the new valves that are
- placed inside of human hearts. Do they come from organ donations given by
- people who have died? I am very curious to find out about this. I am 12
- years old and want to be a doctor someday.
-
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-
- ANSWER: Your curiosity will serve you well in your future profession. Only
- one type of valve, of the many types that exist, comes from a human organ.
- There are two main types of valves used in modern valve replacement surgery.
- They are classified as mechanical and tissue. The mechanical valves come in
- several forms, including one shaped like a cage in which a ball moves to and
- fro to control the flow of blood. There are two other types, named for the
- way they function, a tilting disk and a type that has two leaflets that open
- and close a bit like a door. There are also three tissue types, a treated
- heart valve made from a pig's heart, another fashioned from the lining of a
- cow's heart, and finally a preserved valve taken from the heart of a human
- cadaver (a dead body). Though the mechanical hearts last longer, they also
- allow blood clots to form, and so the patient must take medicine that keeps
- the blood thin. The tissue valves don't have that problem, but they tend to
- wear out faster. You can see we haven't invented the perfect heart valve yet,
- so it is important to take care of those you were born with.
-
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-
- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
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-