What is a bio -uphletic valve?
Bio -up valve is a replacement valve, usually for a heart, made of human or animal tissue. Sometimes these valves are collected from a person who needs a valve replacement and is called autograph. To create prosthetic valves, alternately tissue from the dead from other people can be used, and these can be named homographs. Other times, the valves of some animals are used and referred to as xenographers or heteroštípy. Bio -up valves are usually contrasted with prosthetic mechanical valves, which are usually not made of bio or biological material.
What type of bio -up valve is to be used and the decision on whether to use mechanical valves instead is increasingly open. Many surgeons take precedence based on repairing a particular valve, or they can mostly establish their decision on the age of a person. Generally, all bio -up valves do not last as long as mechanical. May require frequent replacements in children, but on the contrary mechanical valves almost always requireAnticoagulant therapy (warfarin). Mechanical valves are also audible that some people consider irritating.
When the decision is made to replace the valve with a bio -up valve, it must be another decision on which species to use. Autograph can be the most popular, although it is not always possible to use them for every surgery and means doing another surgery to remove the blood vessel from the body of the patient that will function well as a valve somewhere else. Many people will not decide for this additional operation.
Another best option is homographing, which is a healthy valve taken from the corpse tissue. The only challenge with them is that they are not always available. Surgeons could also look at the bio -up talk harvested from a cow or pig. Beef valves seem to last a little longer, but with autographs, homographs and heterogremuffs, some problems remain.
bio -upic valves are made of biological material and may include artificial materials such as stents but do not grow and do not live. For children who need to replace the valve, this may mean replacing the valves quite often. Many people suggest that bio-up valve is best used in people who are older and who do not have to survive the life of 10-20 years that can give the valve. There is no complete consensus in this matter and there are many child cardiotorage surgeons who prefer to use bio -up valve when they can avoid the placement of children on warfarin.
In most cases, the body does not refuse bio -up valve or mechanical valves. They do not tend to cause the same reaction as it occurs when the organs are transplanted. Over time, the biological valves tend to solidify and narrow, and as already mentioned, small children can easily grow the valve and require replacement, which requires further operations.