System for deploying a device to a distal location across a diseased vessel
A method for deploying a medical device such as a heart valve to a desired location in a blood vessel comprising first deploying a tubular filter adjacent to at least one tributary vessel location with a filter deployment member, disengaging said deployment member and removing it, inserting an expandable sheath into the blood vessel, passing a medical device through said sheath to deploy its removing said sheath and removing said filter.
1. A method for deploying a medical device to a distal location across a diseased vessel, comprising:
inserting an elongate deployment member removably coupled to a collapsed tubular filter having a substantially unobstructed lumen which is capable of expanding into a lumen of a blood vessel;
advancing said deployment member to a location adjacent to at least one tributary vessel junction;
expanding said tubular filter into contact with said blood vessel;
disengaging said deployment member from said tubular filter;
removing said deployment member from said blood vessel;
inserting a collapsed expandable sheath into the blood vessel, the collapsed expandable sheath comprising one or more rails extending axially along the collapsed expandable sheath into said blood vessel;
advancing said collapsed expandable sheath to the location where it is desired to deploy a medical device;
distally advancing an elongate obturator assembly through the expandable sheath thereby removing a constraint provided by a distal obturator jacket assembly coupled to the elongate obturator assembly and disposed over the expandable sheath so as to allow the expandable sheath to radially expand, wherein removing the constraint comprises tearing the distal obturator jacket assembly;
inserting a medical device having an outer diameter larger than an inner diameter of said collapsed expandable sheath into said expandable sheath until said medical device passes out of said expandable sheath at its desired deployment location;
collapsing said expandable sheath and withdrawing said expandable sheath from said blood vessel;
inserting an elongate tubular filter removal member into said blood vessel and causing it to engage with said tubular filter; and
withdrawing said tubular filter removal member and said tubular filter from said blood vessel.
2. The method of claim 1 , wherein said tubular filter is self-expanding.
3. The method of claim 2 , wherein said deployment member restrains said tubular filter from expanding until said tubular filter reaches its desired location.
4. The method of claim 1 , wherein said tubular filter is expanded by an expansion element.
5. The method of claim 4 , wherein said expansion element is a balloon.
6. The method of claim 1 , wherein said tubular filter is deployed at a location adjacent to at least three tributary vessel junctions.
7. The method of claim 1 , wherein said tubular filter is coupled to at least one tether which is capable of causing said tubular filter to at least partially collapse and said at least one tether is subjected to tension to aid in the withdrawal of said tubular filter.
8. The method of claim 1 , wherein said medical device is a heart valve.
9. The method of claim 1 , wherein collapsing said expandable sheath comprises actuating a tensile member coupled to a collapsible hoop coupled to an end of the expandable sheath.
10. The method of claim 1 , wherein the substantially unobstructed lumen of the tubular filter extends between walls of the tubular filter configured to be in engagement with the blood vessel.
11. The method of claim 1 , wherein tearing the distal obturator jacket assembly comprises tearing a perforation.