Seal for controlling irrigation in basket catheters

A catheter system comprising:

• a guiding introducer housing a delivery sheath;
• a basket catheter insertable through the delivery shaft, the basket catheter including an outer tubing housing an inner fluid delivery tubing, and a plurality of splines operable to be moved to a deployed position and an undeployed position;
• a membrane provided within the outer tubing of the basket catheter over a fluid delivery port formed in a portion of the inner fluid delivery tubing of the basket catheter;
• and
• a seal molded to the membrane, the seal configured for irrigating between the plurality of splines of the basket catheter, while permitting movement of the fluid delivery tube to move the splines and preventing fluid ingress into the outer tubing.

A catheter system for delivering an anticoagulant comprising:

• an outer shaft housing a delivery sheath;
• a basket catheter insertable through the delivery shaft, the basket catheter including:
• an outer tubing housing an inner fluid delivery tubing, and
• a plurality of splines each connected at a proximal end of the splines to the outer tubing and at a distal end of the splines to the inner fluid delivery tubing, the inner fluid delivery tubing operable to be moved in a first direction relative to the outer tubing to expand the splines to a deployed position, and the inner fluid delivery tubing operable to be moved in a second direction relative to the outer tubing to collapse the splines to an undeployed position;
• and
• a porous membrane sealed between the outer tubing of the basket catheter and the inner fluid delivery tubing of the basket catheter, the porous membrane configured for irrigating between the plurality of splines of the basket catheter with the anticoagulant, while permitting movement of the fluid delivery tube to move the splines.