Devices and methods for minimally-invasive surgical procedures

Abstract

Devices, instruments and tools for minimally invasive surgical procedures. Port devices and methods for hemostatically sealing and providing a port through a tissue wall that interfaces with a fluid containing chamber, by minimally invasive techniques. Assemblies, instruments and methods for minimally invasive access to and through a tissue wall that interfaces with a fluid containing chamber, and for visualizing same. Instruments, assemblies and methods for minimally invasive surgical procedures, including ablation.

1 - 29 . (canceled) 
     
     
         30 . A hemostatic port device, comprising:
 a cannula;   a needle located within the cannula, wherein a distal end portion of the needle is distal to a distal end portion of the cannula;   a first expandable member mounted over the distal end portion of the cannula; and   a second expandable member mounted over the distal end portion of the needle so there is a gap located between the first expandable member and the second expandable member, wherein the second expandable member and the first expandable member are annular, and wherein when the first expandable member and the second expandable member are expanded, the first expandable member and the second expandable member expand to capture tissue therebetween so as to form a hemostatic seal with the tissue.   
     
     
         31 . The hemostatic port device of  claim 30 , further comprising:
 a pressurized fluid source disposed to deliver pressurized fluid to each of the first expandable member and the second expandable member so as to inflate the first expandable member and the second expandable member.   
     
     
         32 . The hemostatic port device of  claim 30 , wherein the first expandable member is an inflatable balloon stretched over the distal end portion of the cannula, and the second expandable member is an inflatable balloon stretched over the distal end portion of the needle.