CATHETERS AND DILATORS FOR TRANS-SEPTAL PROCEDURES AND METHODS FOR MAKING AND USING THEM

摘要

Devices and methods are provided for performing a medical procedure using a trans-septal approach. The device includes a dilator including a proximal end, a distal end terminating in a distal tip, and a lumen extending between the dilator proximal and distal ends, and a needle device including a proximal end, a distal end sized for introduction into the dilator lumen and terminating in a sharpened distal tip. The needle is movable relative to the dilator to selectively expose the needle device distal tip distally from the dilator lumen and advance the dilator relative to the needle device. The dilator may have a complex tapered shape on its distal tip, e.g., including first and second tapered regions. The needle device may include an inner needle including the sharpened distal tip and an outer tube including a substantially blunt distal end that slidably receives the inner needle.

主权项

1. An access device for performing a medical procedure using a trans-septal approach, comprising:
a dilator comprising a proximal end, a distal end sized for introduction into a patient's body and terminating in a tapered distal tip, and a lumen extending between the dilator proximal and distal ends; an outer tube comprising a proximal end, a distal end sized for introduction into the dilator lumen and terminating in a substantially blunt distal tip, and a lumen extending between the outer tube proximal and distal ends; and a needle comprising a proximal end, a distal end sized for introduction into the outer tube lumen and terminating in a sharpened distal tip, wherein the needle is movable relative to the outer tube to selectively expose the needle distal tip distally from the outer tube lumen and retract the needle distal tip into the outer tube lumen, and wherein the dilator is movable relative to the outer tube for advancing the dilator distal tip relative to the outer tube.