| 主权项 |
1. A device for sealing an opening in body tissue, the device comprising:
a hollow elongated member comprising a proximal end and a distal end and having a lumen extending therethrough, wherein the distal end of the hollow elongated member is configured to extend through the opening in the body tissue; a shaft member configured to fit within the lumen of the hollow elongated member; and a deformable sealing member coupled to a distal portion of the shaft member at a coupling point, the deformable sealing member comprising a flexible cover portion coupled to the distal portion of the shaft at the coupling point and a sealing ring; wherein the deformable sealing member is configured to move from a first configuration to a second configuration, and from a second configuration to a third configuration, wherein:
in the first configuration, the deformable sealing member is held within the lumen of the hollow elongated member, wherein the coupling point is located distal to the sealing ring;in the second configuration, the deformable sealing member is positioned distal to and outside of the lumen of the hollow elongated member, and wherein movement of the deformable sealing member from the first configuration to the second configuration allows the sealing ring to enlarge to a dimension larger than that of the hollow elongated member, the flexible cover portion having generally a cup-like shape with an opening that faces proximally, wherein the sealing ring when enlarged is configured to seal against body tissue surrounding the opening in the body tissue; andin the third configuration, the deformable sealing member is held within the lumen of the hollow elongated member, wherein the sealing ring is located distal to the coupling point. |
