公开(公告)号：US10695483B2

公开(公告)日：2020-06-30

申请号：US15526107

申请日：2015-11-11

申请人： UNIVERSITY OF MARYLAND, BALTIMORE

发明人： Zhongjun Wu ,  Bartley P. Griffith ,  Keshava Rajagopal

IPC分类号： A61M1/36 ,  A61M1/10 ,  A61B17/34 ,  A61B17/00 ,  A61M1/12

摘要： The present invention discloses a self-sealing cannula that through a self-sealing mechanism fixed on the ventricular wall or atrial wall, the cannula body is attached to the self-sealing fixture and blood is drawn into the lumen via an external pump and returned to the circulation system through a separate cannula; in the case of the double lumen cannula embodiment, the blood will be drawn into the drainage lumen of the double lumen cannula and returned through an infusion lumen at the desired location.

公开(公告)号：US12005177B2

公开(公告)日：2024-06-11

申请号：US16891655

申请日：2020-06-03

申请人： University of Maryland, Baltimore

发明人： Zhongjun Wu ,  Bartley P. Griffith ,  Keshava Rajagopal

IPC分类号： A61M1/36 ,  A61B17/00 ,  A61B17/34 ,  A61M60/178 ,  A61M60/38 ,  A61M60/857 ,  A61M60/861 ,  A61M60/148

CPC分类号： A61M1/3659 ,  A61B17/3417 ,  A61B17/3421 ,  A61B17/3439 ,  A61M60/178 ,  A61M60/38 ,  A61M60/857 ,  A61M60/861 ,  A61B2017/00247 ,  A61B2017/3419 ,  A61B2017/3425 ,  A61M60/148

摘要： The present invention discloses a self-sealing cannula and methods of its use. The self-sealing cannula can be minimally invasively placed into the heart for drawing and/or returning blood with a self-sealing function at the interface of the blood access site. The disclosed cannula can be implemented as a single lumen cannula or a double lumen cannula, which can be used with ventricular assist devices for heart support or pump-oxygenators for ECMO and respiratory support. Through a self-sealing mechanism fixed on the ventricular wall or atrial wall, a cannula body is attached to the self-sealing fixture and blood is drawn into the lumen via an external pump and returned to the circulation system through a separate cannula. In the case of the double lumen cannula embodiment, the blood will be drawn into the drainage lumen of the double lumen cannula and returned through an infusion lumen at the desired location. The present invention achieves minimally invasive insertion without surgical sutures to the heart, and allows for optimal drainage of the blood from the heart. With use of the double lumen cannula, it prevents need for multiple cannulation sites, and greatly reduces the blood recirculation. Removal of the cannula is simplified without need for suturing or insertion of a plugging member.