Temporary filter retrieval apparatus and method

Abstract

A temporary vena cava filter retrieval apparatus includes an introducer sheath for establishing access into a vessel via a patient access site and a retrieval sheath having a diameter sufficiently small to pass through the introducer sheath and sufficiently large to accommodate a partially or fully uncollapsed filter.

1 . A filter retrieval apparatus, comprising:
 a. an introducer sheath for establishing percutaneous access to a patient's blood vessel; and   b. a retrieval sheath passable through the introducer sheath and capable of accommodating an at least partially uncollapsed filter therein.   
     
     
         2 . The apparatus of  claim 1 , wherein the retrieval sheath includes a side lumen. 
     
     
         3 . The apparatus of  claim 1 , further including a catheter body having a filter attached to a distal end thereof. 
     
     
         4 . The apparatus of  claim 2 , wherein a proximal end of the catheter body passes through the side lumen of the retrieval sheath. 
     
     
         5 . The apparatus of  claim 1 , wherein the introducer sheath has a generally conical shape. 
     
     
         6 . The apparatus of  claim 5  wherein the introducer sheath is disposed in the patient at a depth such that the diameter of the introducer sheath at an access site sufficiently large to accommodate the retrieval sheath therein. 
     
     
         7 . The apparatus of  claim 1 , wherein the introducer sheath further comprises a frangible section adapted to break apart during insertion of the retrieval sheath therethrough. 
     
     
         8 . The apparatus of  claim 7 , wherein the frangible section of the introducer sheath resides within the patient's vasculature during use thereof. 
     
     
         9 .- 14 . (canceled)