Systems for establishing supplemental blood flow in the circulatory system

• US 10,518,011 B2
• Filed: 11/02/2017
• Issued: 12/31/2019
• Est. Priority Date: 08/30/2006
• Status: Active Grant

• Current Assignee: Circulite Inc. (Medtronic Plc)
• Original Assignee: Circulite Inc. (Medtronic Plc)
• Inventors: Farnan, Robert C., Marseille, Oliver, Kerkhoffs, Wolfgang
• Primary Examiner(s): Hulbert, Amanda K
• Application Number:
  US15/801,618
• Publication Number:
  US 20180117228A1
• Time in Patent Office: 789 Days
• Field of Search: 600 16
• 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 system for inserting a cannula through tissue comprising:

a cannula having a lumen; and

an insertion device configured to be received within the lumen of the cannula to facilitate insertion of a portion of the cannula through the tissue, wherein the insertion device includes;

a shaft having proximal and distal end portions;

a tip on the distal end portion of the shaft, the tip being configured for insertion through the tissue; and

an expandable member coupled to the distal end portion of the shaft, the expandable member being movable between a first configuration wherein the expandable member is disengaged with the cannula, and a second configuration wherein the expandable member is releasably secured to the cannula.

2. The system of claim 1, wherein the insertion device further comprises:

a hub connected to the proximal end portion of the shaft.

3. The system of claim 1, wherein:

the tip has a stepped configuration.

4. The system of claim 1, wherein:

the expandable member is generally cylindrical when expanded.

5. The system of claim 1, wherein:

the shaft further comprises inner and outer cylindrical extrusions connected by a plurality of circumferentially spaced ribs.

6. The system of claim 1, wherein the cannula is an inflow cannula, and further comprising:

a blood pump having an inlet and an outlet; and

an outflow cannula coupled at one end thereof to the outlet of the blood pump and configured to be coupled, at an opposite end thereof, to an artery of the patient;

wherein

the proximal end portion of the inflow cannula is coupled to the inlet of the blood pump, the distal end portion of the inflow cannula being configured for insertion into a chamber of the heart.