Vascular re-entry device
AssigneeC.R. Bard, Inc.
InventorJeff Sarge
Life of this patent
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Abstract
An ultrasonic device having a tri-axial configuration including an ultrasound transmission member, a dilator, and a sheath is disclosed. The ultrasound device may be used in a procedure to treat an occluded blood vessel. The ultrasound transmission member can transmit ultrasonic energy from an ultrasonic transducer to a distal end. The dilator facilitates entry of the ultrasonic transmission member into the subintimal space of a blood vessel. The sheath may articulate to aid in the process of re-entering the central lumen of the blood vessel.
Claims9
An ultrasonic reentry device comprising:
- an elongate ultrasound transmission member having a proximal end coupled to a sonic connector and a distal end configured to penetrate a vessel wall;
- a catheter body having a distal end and at least one lumen extending longitudinally therethrough, the lumen surrounding at least a portion of the ultrasound transmission member;
- a dilator removably coupled to the catheter body and surrounding at least a portion of the ultrasound transmission member, the dilator having a length sized to expose at least a portion of the distal end of the ultrasound transmission member when the ultrasound transmission member is disposed within the dilator;
- and
- a sheath disposed over at least a portion of the dilator, the catheter body, and the ultrasound transmission member,
- wherein
- the sheath includes an articulating distal end configured to articulate up to about 90° away from a longitudinal axis,
- and
- the at least one lumen has an inner diameter and the dilator has an outer diameter sized to fit inside the inner diameter.
An ultrasonic device for entering and exiting an extraluminal space of a vessel comprising:
- a catheter body having at least one lumen extending longitudinally therethrough;
- an elongate ultrasound transmission member extending longitudinally through the lumen, at least a portion of the ultrasound transmission member having an outer surface that tapers to a needle-like distal end;
- a dilator disposed over at least a portion of the ultrasound transmission member and configured to follow the ultrasound transmission member into the extraluminal space, at least a portion of the catheter body overlapping at least a proximal end of the dilator;
- and
- a sheath removably disposed over at least a portion of the dilator,
- wherein
- the sheath includes an articulating distal end,
- the needle-like distal end includes a rounded tip,
- and
- the dilator includes at least one portion tapered in a direction extending distally from the proximal end.
A method of re-entering a central lumen of a vessel from an extraluminal space of the vessel, comprising:
- advancing a sheath over a guidewire positioned in the extraluminal space of the vessel;
- removing the guidewire;
- advancing an ultrasonic device having a distal end through the sheath;
- articulating at least a portion of the sheath towards the central lumen of the vessel;
- advancing a dilator through the sheath;
- and
- transmitting a vibration to the distal end of the ultrasonic device;
- and re-entering the central lumen of the vessel with the distal end of the ultrasonic device,
- wherein the dilator is sized to prevent the ultrasonic device from being advanced entirely through the dilator.
Dependencies are inferred from the claim text.