Transseptal cannula, tip, delivery system, and method

• US 9,211,367 B2
• Filed: 04/28/2015
• Issued: 12/15/2015
• Est. Priority Date: 10/24/2007
• Status: Active Grant

• Current Assignee: Circulite Inc. (Medtronic Plc)
• Original Assignee: Circulite Inc. (Medtronic Plc)
• Inventors: Farnan, Robert C., Olson, Scott A., Jung, Elizabeth, Dusbabek, Andrew J., Hudgins, Robert G.
• Primary Examiner(s): Lavert, Nicole F
• Application Number:
  US14/697,767
• Publication Number:
  US 20150224240A1
• Time in Patent Office: 231 Days
• Field of Search: 600 16- 17, 607/101, 607/115, 607/130
• US Class Current: 1/1
• CPC Class Codes: A61M 1/36 Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
• CPC Class Codes: A61M 1/3653 Interfaces between patient blood circulation and extra-corporal blood circuit
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation
• CPC Class Codes: A61M 1/3666 Cardiac or cardiopulmonary bypass, e.g. heart-lung machines
• CPC Class Codes: A61M 1/3667 with assisted venous return
• CPC Class Codes: A61M 2025/0233 specifically adapted for attaching to a body wall by means which are on both sides of the wall, e.g. for attaching to an abdominal wall
• CPC Class Codes: A61M 2205/04 implanted
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00
• CPC Class Codes: A61M 60/165 implantable in, on, or around the heart
• CPC Class Codes: A61M 60/508 Electronic control means, e.g. for feedback regulation
• CPC Class Codes: A61M 60/857 Implantable blood tubes
• 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 cannula assembly, further comprising a cannula body for directing blood from the heart of a patient, having distal and proximal ends and a lumen therebetween. A tip coupled to the distal end of the body, the tip having an opening. A pump for drawing blood into the cannula assembly and dispensing the blood from the cannula assembly and into the patient circulatory system. The lumen of the cannula body further comprises a first inner diameter at the proximal end and a second inner diameter at the distal end, the first inner diameter being larger than the second inner diameter. A tapered portion defined as a decrease in inner diameter from the first inner diameter to the second inner diameter between the proximal and distal ends, the tapered portion configured to prevent cavitation of the blood within the cannula.

Claims

1. A system for assisting the flow of blood through a patient circulatory system, comprising:

an outflow cannula configured to provide fluid communication between a pump outlet and the cardiovascular system of a patient; and

an adaptor device configured to fluidicly communicate a pump inlet and a cannula body, having a proximal end, the adaptor device including a proximal end, a distal end, and a lumen therebetween;

wherein the distal end of the adaptor device is configured to couple with the proximal end of the cannula body and the proximal end of the adaptor device is configured to couple with the pump inlet;

wherein the adaptor device is configured such that blood flowing into the distal end of the adaptor device flows in a generally lateral direction relative to the patient and blood flowing out of the proximal end of the adaptor device and into the pump inlet flows in a generally medial direction relative to the patient.

2. The system of claim 1, wherein the lumen of the adaptor device includes a tapered portion between the proximal and distal ends, of the adaptor device, the tapered portion defined as a decrease in inner diameter from a first inner diameter to a second inner diameter between the proximal and distal ends of the adaptor device, respectively.

3. The system of claim 2, wherein the decrease in inner diameter is constant along the tapered portion.