Patent ID: 8628552

Claim:
A medical device configured to engage and penetrate a pericardial sac, said device comprising: an outer tubular body comprising a proximal end, a distal end and a first lumen extending between the ends; an inner tubular body comprising a proximal end and a distal end and a second lumen extending between the ends, the inner tubular body located in the lumen of the outer tubular body, the proximal end of the inner tubular body operably coupled to the proximal end of the outer tubular body, the distal end of the inner tubular body being extendable out of the distal end of the outer tubular body and defining an opening sized for passage of a guidewire through the second lumen and the opening; and a helical tissue engagement member having a longitudinal axis, the engagement member: displaceable along the length of the outer tubular body from a first position to a second position, the first position being in the lumen of the outer tubular body recessed relative to the distal end of the outer tubular body, and the second position extending out of the distal end of the outer tubular body and displaceable relative to the inner tubular body; and rotatable about the longitudinal axis and relative to the outer tubular body wherein the inner tubular body in the vicinity of the distal end of the inner tubular body extends through at least one coil of the helical tissue engagement member.