METHODS FOR ESTABLISHING SUPPLEMENTAL BLOOD FLOW IN THE CIRCULATORY SYSTEM

• US 20110137234A1
• Filed: 02/07/2011
• Published: 06/09/2011
• Est. Priority Date: 08/30/2006
• Status: Active Grant

• Current Assignee: Circulite Inc. (Medtronic Plc)
• Original Assignee: Circulite Inc. (Medtronic Plc)
• Inventors: Marseille, Oliver, Farnan, Robert C., Kerkhoffs, Wolfgang
• Granted Patent: US 9,566,375 B2
• Time in Patent Office: Days
• US Class Current: 604/22
• CPC Class Codes: A61B 17/3415 for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters A61B17/3417 takes precedence; body piercing catheter guide needles A61M25/06
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 25/09 Guide wires
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/178 drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices
• CPC Class Codes: A61M 60/216 including a rotating member acting on the blood, e.g. impeller
• CPC Class Codes: A61M 60/861 Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of the patient's body
• CPC Class Codes: A61M 60/865 Devices for guiding or inserting pumps or pumping devices into the patient's body

Abstract

A blood circulation assist system comprising an inflow cannula having a lumen and an insertion device configured to be received therein and to facilitate insertion of a portion of the inflow cannula into a heart chamber. The insertion device includes a shaft having distal and proximal end portions and a plurality of lumens. A first lumen is configured to receive a guidewire and a second lumen is configured to receive a pressurized fluid. A tip connected to the distal end portion of the shaft is configured for insertion into the heart chamber. The tip has a hollow interior communicating with the first shaft lumen. An inflatable member is coupled to the distal end portion of the shaft and includes a hollow interior in fluid communication with the second shaft lumen. The inflatable member is movable between deflated and inflated configurations for releasably securing the insertion device to the inflow cannula.

Claims

1. A method of inserting an inflow cannula having a lumen into a chamber in a heart of a patient comprising:

inserting an insertion device into the lumen of the inflow cannula wherein at least a portion of a tip of the insertion device protrudes beyond a distal end portion of the inflow cannula, the insertion device further including a shaft, with the tip being secured to a distal end portion of the shaft, and an expandable member coupled to the distal end portion of the shaft and proximal to the tip;

expanding the expandable member to releasably secure the inflow cannula to the insertion device; and

inserting the tip of the insertion device and the distal end portion of the inflow cannula into the chamber of the heart.

2. The method of claim 1, further comprising:

securing the inflow cannula to tissue of the heart defining the chamber; and

disengaging the expandable member from the cannula after securing the cannula to the heart tissue.

3. The method of claim 2, wherein the expandable member is an inflatable member and wherein:

expanding further comprises inflating the inflatable member; and

disengaging further comprises deflating the inflatable member.

4. The method of claim 3, further comprising:

removing the insertion device from the chamber of the heart and the lumen of the inflow cannula after deflating the inflatable member.

5. The method of claim 3, wherein inflating the inflatable member further comprises:

directing a pressurized fluid through a lumen formed in the shaft of the insertion device into a hollow interior of the inflatable member.

6. The method of claim 1, further comprising:

creating a puncture in the tissue defining the chamber; and

gradually dilating the puncture with the tip of the insertion device to a larger size to facilitate inserting the distal end portion of the inflow cannula into the chamber of the heart.

7. The method of claim 1, wherein the inflow cannula is secured by the expandable member while inserting the tip into the chamber of the heart.

8. A method of inserting an inflow cannula into a chamber in a heart of a patient comprising:

temporarily securing a distal end portion of an insertion device to a distal end portion of the inflow cannula;

inserting a tip of the insertion device into the chamber of the heart;

inserting the distal end portion of the inflow cannula into the chamber of the heart;

releasing the distal end portion of the insertion device from the distal end portion of the inflow cannula; and

withdrawing the insertion device from the inflow cannula.

9. The method of claim 8, further comprising:

creating an opening in the tissue defining the chamber; and

gradually dilating the opening with the tip of the insertion device to a larger size to facilitate inserting the distal end portion of the inflow cannula into the chamber of the heart.

10. A method of inserting a cannula having a lumen through biologic tissue comprising:

inserting an insertion device into the lumen of the cannula wherein at least a portion of a tip of the insertion device protrudes beyond a distal end portion of the cannula, the insertion device further including a shaft, with the tip being secured to a distal end portion of the shaft, and an expandable member coupled to the distal end portion of the shaft and proximal to the tip;

expanding the expandable member to releasably secure the cannula to the insertion device; and

inserting at least the tip of the insertion device and the distal end portion of the cannula through the tissue.

11. The method of claim 10, wherein the expandable member is an inflatable member and wherein expanding further comprises:

inflating the inflatable member to releasably secure the cannula to the insertion device.

12. The method of claim 10, wherein expanding further comprises:

creating an opening in the tissue defining the chamber; and

gradually dilating the opening with the tip of the insertion device to a larger size to facilitate inserting the distal end portion of the cannula through the tissue.

13. The method of claim 10, wherein the cannula is secured by the expandable member while inserting the tip through the tissue.