Slideable cannula and method of use

• US 6,645,193 B2
• Filed: 08/28/2001
• Issued: 11/11/2003
• Est. Priority Date: 08/11/1998
• Status: Expired due to Term

• Current Assignee: Edwards Lifesciences Corporation
• Original Assignee: Edwards Lifesciences LLC (Edwards Lifesciences Corporation)
• Inventors: Mangosong, Lorraine
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): Sirmons, Kevin C.
• Application Number:
  US09/941,380
• Publication Number:
  US 20020026155A1
• Time in Patent Office: 805 Days
• Field of Search: 604/506-509, 604/164.11, 604/96.01, 604/264
• US Class Current: 604/506
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 2017/00243 cardiac
• CPC Class Codes: A61B 2017/003 Steerable
• CPC Class Codes: A61B 2017/00331 with preformed bends
• CPC Class Codes: A61B 2017/22067 Blocking; Occlusion A61B2017/22054 takes precedence
• CPC Class Codes: A61B 2017/2905 flexible
• 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 2025/0096 being laterally outward extensions or tools, e.g. hooks or fibres
• CPC Class Codes: A61M 25/0041 pre-formed, e.g. specially adapted to fit with the anatomy of body channels urethral catheters A61F2/04
• 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

Abstract

A cannula system having an internally slidable elongate tubular member frictionally anchored within a trocar, and optionally including a flange which acts as a positive stop against the trocar, that can be deployed for various treatments, including aortic cannulation during cardiopulmonary bypass, for example during CABG surgery. The tubular member has a proximal end, a lumen, and a flexible distal end which carries a preformed angled configuration relative to its proximal region and is bendable to a substantially linear configuration. The rigid trocar maintains the cannula in a substantially linear configuration. When the cannula is advanced through the lumen beyond the distal end of the trocar, the tubular member regains its angled configuration. Methods for using the devices herein are also disclosed.

Claims

1. A method for cannulating an artery, comprising the steps of:

providing a slideable cannula comprising an elongate tubular member having a proximal end, a distal end, and a lumen therebetween, the distal end having a preformed angled configuration relative to the proximal end, the slideable cannula further comprising a trocar having a proximal end, a distal end, and a lumen shaped to receive the elongate tubular member;

inserting the elongate tubular member into the lumen of the trocar, the trocar maintaining the tubular member in a substantially linear configuration;

inserting the trocar through an incision in the aorta; and

advancing the distal end of the tubular member beyond the distal end of the trocar into the aorta, wherein the distal end of the tubular member regains its preformed angle configuration.

2. The method of claim 1, wherein the distal end of the slideable cannula comprises a corrugated region.

3. The method of claim 1, wherein the incision is made using the distal end of the trocar.

4. The method of claim 1, wherein the incision is made using the distal end of the cannula.

5. The cannula of claim 4, wherein the elongate tubular member carries a retractable surgical blade and a lockout mechanism at its distal end.

6. The method of claim 1, wherein the slideable cannula further comprises a cardioplegia lumen communicating with a cardioplegia port, and wherein the method further comprises the step of delivering cardioplegia solution through the cardioplegia port.

7. The method of claim 1, wherein the lumen of the slideable cannula is adapted to carry oxygenated blood, and wherein the method further comprises the step of delivering oxygenated blood into the aorta through the lumen of the slideable cannula.

8. The method of claim 1, wherein the lumen of the trocar is further adapted to carry oxygenated blood, and wherien the method further comprises the step of delivering oxygenated blood into the aorta through the lumen of the trocar.