Jyros Bileaflet Heart Valve

Description (Brief)
The Jyros Bileaflet Heart Valve has a hinge that rotates inside the housing/valve ring. In one study, those who received the implant showed no signs of hinge rotation. Over all the valve had good clinical results, but there were some incidences of thrombosis. It has two pyrolytic carbon leaflets (impregnated with Boron carbide) within carbon housing. In 1992, 100 valves were implanted in patients 33 to 80 years old. 92 patients left the hospital. At that time there were no instances of thromboembolic events. The idea behind rotating hinges is that lack of stasis would mean a lesser likelihood of thromboembolism. In another study of 19 patients, only 50% of valves showed rotation of the leaflets. It was decided that the performance of the valve was successful, irrespective of whether or not the leaflets rotate.
In Russia, the valve was named "Carbonix-1" and was clinically used beginning in 1988. In 1990, the valve was first used in the United States under the trademark, "Jyros." The development of artificial heart valves took place in many countries around the world, and there were many international collaborations.
Location
Currently not on view
Object Name
cardiology
artificial heart valve
date made
ca 1992
Physical Description
pyrolytic carbon (overall material)
cloth (overall material)
Measurements
overall: .9 cm x 3.6 cm; 11/32 in x 1 13/32 in
place made
Russia
ID Number
2015.0031.52
catalog number
2015.0031.52
accession number
2015.0031
subject
Cardiology
Prosthesis
Health & Medicine
Artificial Heart Valves
Artificial Organs
See more items in
Medicine and Science: Medicine
Artificial Heart Valves
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Manuel Villafaña
Additional Media

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