Vascular closure device having a flowable sealing material
Various embodiments of a device are shown and disclosed for closing a vascular access puncture site following percutaneous diagnostic or therapeutic interventional procedures. The vascular closure device is configured to safely and accurately deploy a sealing material that undergoes a phase change when deployed inside the tissue tract. The sealing material may be a solid at room temperature and a liquid or gel at body temperature. Also, the sealing material may change from a liquid or gel to a cubic phase when it comes into contact with bodily fluids.
1. A vascular closure device comprising:
a vessel locating member configured to be inserted through a hole in a blood vessel to locate a wall of the blood vessel that is adjacent to the hole; and
sealing material configured to be deployed adjacent to the hole and outside of the blood vessel;
wherein the sealing material comprises a monoglyceride including a fatty acid group having 12 to 22 carbon atoms.
2. The vascular closure device of claim 1 wherein the sealing material has a melting point of about 27° C. to 37° C.
3. The vascular closure device of claim 1 wherein the sealing material undergoes a phase change when deployed adjacent to the hole in the blood vessel.
4. The vascular closure device of claim 1 wherein the sealing material changes to a cubic phase when deployed adjacent to the hole in the blood vessel.
5. The vascular closure device of claim 1 wherein the vascular closure device is configured to be inserted into a tissue tract that leads to the hole in the blood vessel, and wherein the sealing material is configured to be deployed by retracting a carrier tube to expose the sealing material to the tissue tract.
6. The vascular closure device of claim 1 wherein the vascular closure device is configured to be inserted into a tissue tract that leads to the hole in the blood vessel, and wherein the vascular closure device is configured so that the sealing material flows out of the vascular closure device in a direction that is not parallel to the tissue tract.
7. The vascular closure device of claim 1 wherein the vessel locating member moves between an expanded configuration to allow the vessel locating member to contact an interior surface of the wall of the blood vessel and a contracted configuration to allow the vessel locating member to pass through the hole in the blood vessel.
8. The vascular closure device of claim 1 wherein the vessel locating member is oriented at an oblique angle relative to a lengthwise axis of the vascular closure device.
9. The vascular closure device of claim 1 wherein the vessel locating member includes a plurality of structural support members covered by a resilient material.
10. The vascular closure device of claim 1 comprising an indicator that signals when the vessel locating member is positioned adjacent to the wall of the blood vessel.