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1. WO2021029920 - APPARATUS AND METHOD FOR ADVANCING CATHETERS OR OTHER MEDICAL DEVICES THROUGH A LUMEN

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[ EN ]

Claims:

1. A transporter catheter configured to be located inside a lumen of an outer catheter, the transporter catheter comprising:

a shaft, said shaft comprising a proximal end, a distal end, at least one orienting balloon and at least one anchoring balloon;

the at least one orienting balloon positioned on the shaft adjacent to the distal end of the shaft, the at least one orienting balloon configured to slidably engage an inner surface of a patient’s vasculature;

the at least one anchoring balloon located on the shaft between the at least one orienting balloon and the proximal end of the shaft, the at least one anchoring balloon configured to non-slidably anchor the transporter catheter to the outer catheter by pressing against an inner surface of the lumen of the outer catheter; and

the shaft configured to be pushed and/or torqued to advance and maneuver the outer catheter through the patient’s vasculature.

2. The transporter catheter of claim 1, further comprising a guidewire and wherein the shaft comprises at least one internal channel for the guidewire.

3. The transporter catheter of claim 1, wherein the at least one orienting balloon comprises a proximal portion and a distal portion, the distal portion of the at least one orienting balloon being located outside the distal end of the outer catheter and the proximal portion of the at least one orienting balloon being located inside the distal end of the outer catheter.

4. The transporter catheter of claim 1, wherein the at least one orienting balloon comprises a proximal portion and a distal portion, the distal portion of the at least one orienting balloon being contoured to assist with smooth advancing of the outer catheter through the patient's vasculature.

5. The transporter catheter of claim 1, wherein the at least one orienting balloon comprises a proximal portion and a distal portion, a surface of at least the distal portion of the at least one orienting balloon is coated with a friction-reduction coating.

6. The transporter catheter of claim 1, wherein the at least one orienting balloon comprises a proximal portion and a distal portion, a diameter of the distal portion of the at least one orienting balloon is about same or greater than an outer diameter of the outer catheter.

7. The transporter catheter of claim 1, wherein the transporter catheter is steerable using at least one pull-wire disposed longitudinally along a length of the transporter catheter.

8. The transporter catheter of claim 7, further comprising at least one steering ring mechanically coupling a distal end of the at least one pull-wire to a distal end portion of the transporter catheter, wherein the steering ring is disposed at a location on the shaft, said location selected from a group including (a) at or near the distal end of the anchoring balloon, (b) under the anchoring balloon, (c) near the proximal of the orienting balloon and (d) near the distal end of the orienting balloon.

9. The transporter catheter of claim 1, further comprising a stiffening stylet to stiffen the shaft.

10. The transporter catheter of claim 1, wherein the shaft comprises a torque-transfer layer comprising a helical coil and/or a plait-matrix.

11. The transporter catheter of claim 1, wherein the shaft comprises a plurality of segments having varying degrees of stiffness, and a degree of stiffness of the varying degrees of stiffness at the proximal end of the shaft is greater than a degree of stiffness of the varying degrees of stiffness at the distal end of the shaft.

12. The transporter catheter of claim 1, wherein the shaft comprises at least an inner layer and an outer layer, the outer layer comprising a braided-wire assembly, said braided-wire assembly being formed by braiding a plurality of flat wires, circular wires, or combinations thereof.

13. The transporter catheter of claim 1, wherein the at least one anchoring balloon comprises a coating and/or a material configured to provide frictional resistance thereby reducing slippage or uses a friction-based mechanism between an outer surface of the at least one anchoring balloon and the inner surface of the lumen of the outer catheter.

14. The transporter catheter of claim 1, wherein the shaft is tapered and the proximal end of the shaft has a diameter greater than a diameter of the distal end of the shaft.

15. The transporter catheter of claim 1, further comprising at least one radio-opaque marker, wherein the at least one radio-opaque marker is disposed on the transporter catheter at one or more locations selected from a group including the at least one orienting balloon, the at least one anchoring balloon, a length of the shaft, the distal end of the shaft, an area proximate to a front-end portion of the orienting balloon.