Kay-Shiley Mitral Heart Valve
date: label: date made
content: after 1965
name: label: maker
content: Shiley Incorporated
notes: label: Description
content: This is a type 1 Kay-Shiley non-tilting disc valve, the most common type of Kay-Shiley valve. It has four vertical struts form two parallel bars made of Stellite, and the disc is made of a radiolucent silicone rubber. It was first used in 1965. Dr. Viking Bjork (1918-2009) implanted Kay-Shiley aortic valves in 60 patients, but results were disappointing. There were incidences of thromoembolism, sudden death, disc wear (particularly the edges), the narrowing of the artery, valvular leaks, disc cocking, and disc variance. Another weakness of this design is that it only took a small amount of thrombus to interfere with disc mobility. In contrast, there is another case of a woman who received a Kay-Shiley mitral implant and went 299 months without valve dysfunction. The accompanying label reads, "KAY--SHILEY #7 Heart Valve"
label: Description
content: In 1956, Dr. Earle B. Kay (1911-2000) of St. Vincent Charity Hospital in Cleveland, Ohio helped to perform open-heart surgery using his own heart-lung machine, the Kay-Cross Disc Oxygenator. Donald Shiley (1920-2010), an engineer, was one of the co-inventors of the Bjork–Shiley artificial heart valve. He graduated from the University of Portland in 1951, where he studied engineering. Later, he established his own company, Shiley Laboratories. His first valve was developed with heart-surgeon Dr. Earle Kay, and it was the first disc valve.
label: Location
content: Currently not on view
place: label: place made
content: United States: California, Irvine
topic: label: Subject
content: Cardiology
label: Subject
content: Prosthesis
label: Subject
content: Artificial Organs
setName: label: See more items in
content: Medicine and Science: Medicine
label: See more items in
content: Health & Medicine
label: See more items in
content: Artificial Heart Valves
creditLine: label: Credit Line
content: Gift of Manuel Villafaña
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2015.0031.44
label: catalog number
content: 2015.0031.44
label: accession number
content: 2015.0031
label: serial number
content: 7K527
objectType: label: Object Name
content: cardiology
label: Object Name
content: artificial heart valve
physicalDescription: label: Physical Description
content: stellite (overall material)
label: Physical Description
content: silicone rubber (overall material)
label: Physical Description
content: cloth (overall material)
label: Measurements
content: overall: 1.6 cm x 3.5 cm x 3.5 cm; 5/8 in x 1 3/8 in x 1 3/8 in