Percutaneous bioprosthetic venous valve: a long-term study in sheep.
A long-term evaluation of a new percutaneously placed bioprosthetic, bicuspid venous valve (BVV) consisting of a square stent and small intestinal submucosa (SIS) covering was performed in 12 sheep. Of 26 BVVs placed into the jugular veins, 25 exhibited good valve function on immediate venography and 22 on venograms obtained before the sheep were killed. Gross and histologic examination results demonstrated incorporation of remodeled and endothelialized SIS BVVs into the vein wall. Slight to moderate leaflet thickening was found mostly at their bases. Percutaneously placed SIS BVV is a promising one-way, competent valve that resists venous back-pressure while allowing forward flow.
Pavcnik
Dusan
D
Dotter Interventional Institute, Oregon Health Sciences University and Portland Veterans Administration Medical Center, 97201, USA. pavcnikd@ohsu.edu
Uchida
Barry T
BT
Timmermans
Hans A
HA
Corless
Christopher L
CL
O'Hara
Michael
M
Toyota
Naoyuki
N
Moneta
Gregory L
GL
Keller
Frederick S
FS
Rösch
Josef
J
D000818:Animals; D001705:Bioprosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000295:instrumentation; D004869:Equipment Safety; D005260:Female; D005500:Follow-Up Studies; D007601:Jugular Veins / Q000000981:diagnostic imaging / Q000601:surgery*; D023421:Models, Animal; D010690:Phlebography; D011474:Prosthesis Design; D012756:Sheep; D013525:Surgical Instruments; D013995:Time; D013997:Time Factors; D016896:Treatment Outcome; D014654:Vascular Patency / Q000502:physiology