|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B65H-081/00 B29D-023/00 A61F-001/02|
|미국특허분류(USC)||156/167 ; 156/2731 ; 264/24|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 147 인용 특허 : 0|
Vascular grafts are provided that have an external surface which has a porous structure that is conducive to tissue ingrowth thereinto after the vascular graft has been implanted. The vascular graft is prepared by winding an extruded fiber onto a mandrel in the presence of intermittently applied electrostatic forces. Such vascular graft may include an internal surface that was formed under the influence of the electrostatic charge, which internal surface has a porosity that is substantially less than that of said porous external surface.
A method of forming biocompatible vascular graft, comprising: extruding a continuous fiber forming biocompatible polymeric material through an orifice in order to form an elongated fiber; winding said elongated fiber on a mandrel such that the continuous fiber forms a plurality of windings that define a non-woven cylinder having overlying fibers that contact one another; intermittently applying an electrostatic charge between said extrusion orifice and said mandrel, said intermittent electrostatic force application procedure including accelerating the el...