Dual inflatable arterial prosthesis
A system includes an inner filling structure around a stent-structure and an outer filling structure around the inner filling structure. The inner filling structure can be configured to produce a proximal seal with a first portion of an artery at a proximal end and a distal seal with a second portion of an artery at a distal end when the inner filling structure is in an inflacted state. The outer filling structure can have an inner surface surrounding at least a portion of the inner filling structure. The outer filling structure can be configured to be inflatable to occupy a space within an aneurysm at a lower pressure than a pressure in the inner filling structure.
1. A system, comprising:
an inner filling structure configured to be inflated with a hardenable material to produce a first seal with a first portion of an artery at a first end of the inner filling structure; and
an outer filling structure having an inner surface that surrounds at least a portion of the inner filling structure, the outer filling structure inflatable to occupy a space within an aneurysm
wherein the inner filling structure is configured such that a diameter of the inner filling structure varies along a length of the inner filling structure when the inner filling structure is in an inflated state.
2. The system of claim 1 ,
wherein the inner filling structure is inflatable to produce a second seal with a second portion of the artery at a second end of the inner filling structure.
3. The system of claim 1 ,
wherein a pressure within the inner filling structure when the inner filling structure is in an inflated state is higher than a pressure within the outer filling structure when the outer filling structure is in an inflated state.
4. The system of claim 1 ,
wherein the inner filling structure comprises a semi-compliant material that is less compliant than a material of the outer filling structure.
5. The system of claim 1 ,
wherein the inner filling structure is configured to be inflatable to a pressure in a range of 300 to 600 mm Hg; and
wherein the outer filling structure is configured to be inflatable to a pressure in a range of 50 to 120 mm Hg.
6. The system of claim 1 ,
wherein the inner filling structure is fillable with a hardenable material to a pressure that is higher than a pressure in the outer filling structure.
7. The system of claim 1 ,
wherein the inner filling structure is configured to overlap a healthy region of the artery that is proximal the aneurysm.
8. The system of claim 1 ,
wherein the outer filling structure is configured to contact a wall of the aneurysm after being filled to a pressure that is lower than a pressure in the inner filling structure.
9. The system of claim 1 ,
wherein the inner filling structure has a hardness of at least about 55D shore-A.
10. The system of claim 1 ,
wherein the outer filling structure has a hardness of at least about 70 shore-A or 77 shore-A.
11. A system, comprising:
a stent;
an inner filling structure attached to the stent, the inner filling structure inflatable with a filling medium;
an outer filling structure having an inner surface that surrounds at least a portion of the inner filling structure, the outer filling structure inflatable to occupy a space within an aneurysm;
a first fill line connected to the inner filling structure; and
a second fill line connected to the outer filling structure.
12. A system, comprising:
a stent;
an inner filling structure attached to the stent, the inner filling structure inflatable with a filling medium; and
an outer filling structure having an inner surface that surrounds at least a portion of the inner filling structure, the outer filling structure inflatable to occupy a space within an aneurysm;
wherein the inner filling structure is configured such that a diameter of a proximal end of the inner filling structure is greater than a diameter of a distal end of the inner filling structure when the inner filling structure is in an inflated state.
13. A system, comprising:
a stent;
an inner filling structure attached to the stent, the inner filling structure inflatable with a filling medium; and
an outer filling structure having an inner surface that surrounds at least a portion of the inner filling structure, the outer filling structure inflatable to occupy a space within an aneurysm,
wherein the inner filling structure is configured such that a diameter of the inner filling structure varies along a length of the inner filling structure when the inner filling structure is in an inflated state.