Corkscrew shape for right-sided cardiac device

Patent metadata

Field	Value
Publication number	US-12458792-B2
Application number	US-202016902748-A
Country	US
Kind code	B2
Filing date	Jun 16, 2020
Priority date	May 17, 2016
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A catheter includes a catheter body, a pump assembly and a cannula. The pump assembly can be disposed at a distal end of the catheter body and has a distal portion. The cannula can be coupled to the distal end portion of the pump assembly and can include a proximal cannula portion and a distal cannula portion. The distal cannula portion has an approximately helical shape which can allow the cannula to be inserted into a patient's right heart and pump blood therethrough. In certain implementations, the distal tip of the helical shape has a slight bias relative to the main helix to further facilitate delivery of the device. In certain applications this bias is toward the central axis of the helix.

First claim

I claim:

1 . A heart pump assembly comprising:
a rotor; a housing sized for percutaneous insertion and enclosing the rotor, the housing having a distal end portion; and a cannula coupled to the distal end portion of the housing, the cannula comprising a proximal cannula portion and a distal cannula portion, the distal cannula portion having an approximately helical shape configured to conform to an anatomy of a heart of a patient when inserted in the heart of the patient, wherein the helical shape approximated by the distal cannula portion has a longitudinal axis parallel to and offset from a longitudinal axis of the proximal cannula portion.

2 . The heart pump assembly of claim 1 , wherein the helical shape approximated by the distal cannula portion has a diameter between about 20 mm and 40 mm.

3 . The heart pump assembly of claim 2 , wherein the helical shape approximated by the distal cannula portion has a pitch between about 70 mm and 120 mm.

4 . The heart pump assembly of claim 1 , wherein a distal tip of the cannula is angled toward a center of an axis of the helical shape approximated by the distal cannula portion.

5 . The heart pump assembly of claim 1 , wherein the helical shape approximated by the distal cannula portion is based upon CT scans of the patient.

Assignees

• Abiomed Inc

Inventors

• Zarins Christopher

Classifications

• A61M60/422

  the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps · CPC title

• A61M60/216

  including a rotating member acting on the blood, e.g. impeller · CPC title

• A61M60/546

  of blood flow, e.g. by adapting rotor speed · CPC title

• A61M60/178

  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 title

• A61M60/829

  having a purge fluid supply · CPC title