Medical sealing device
View Patent ↗The invention relates to a medical sealing device ( 1 ) for the sealing of a puncture hole in a vessel wall, and comprises an inner member ( 2 ), which is adapted to be positioned at an interior surface of the vessel wall, and an outer member ( 3 ), which is adapted to be positioned outside the vessel wall, the inner member ( 2 ) and the outer member ( 3 ) being held together by a retaining member ( 4 ), wherein at least one of said inner member ( 2 ), outer member ( 3 ) and retaining member ( 4 ) is made from at least one shape memory polymer.
1. A medical sealing device for sealing a hole in a wall of a body organ, comprising:
an inner member adapted to be positioned against an interior surface of the wall;
a retaining member attached to the inner member; and
an outer member adapted to be positioned outside the wall, the outer member having a hole through which the retaining member passes;
wherein at least one of the inner member and the outer member comprise a shape memory material;
wherein in a first state the at least one of the inner member and the outer member has a surface with a flat cross-section configured to face the wall of the body organ and in a second state the surface of the at least one of the inner member and the outer member has a non-flat shape configured to clamp the wall between the inner member and the outer member,
wherein the at least one of the inner member and the outer member has the flat cross-section at a temperature below a transition temperature and the non-flat shape above the transition temperature.
2. A medical sealing device according to claim 1 , wherein in the second state the at least one of the inner member and the outer member has a concave shape.
3. A medical sealing device according to claim 1 , wherein the body organ is a blood vessel, and wherein:
the inner member is adapted to be positioned against an interior surface of the wall of the blood vessel; and
the outer member is adapted to be positioned outside the wall of the blood vessel.
4. A medical sealing device according to claim 1 , wherein the shape memory material is a shape memory polymer.
5. A medical sealing device according to claim 1 , further comprising a locking member to lock the inner member and the outer member in place in the second state.
6. A medical sealing device according to claim 5 , wherein the locking member is the retaining member, which includes a portion along a long axis of the retaining member that is thicker than other portions along the long axis of the retaining member.