Cavo-atrial cannula and method of use

• US 20010000528A1
• Filed: 12/04/2000
• Published: 04/26/2001
• Est. Priority Date: 03/23/1999
• Status: Abandoned Application

• Current Assignee: Peter Cho
• Original Assignee: Peter Cho
• Inventors: Cho, Peter
• Application Number:
  US09/728,996
• Publication Number:
  US 20010000528A1
• Time in Patent Office: Days
• US Class Current: 604/117
• CPC Class Codes: A61M 1/3623 Means for actively controlling temperature of blood
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation
• CPC Class Codes: A61M 25/0043 characterised by structural features
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked

Abstract

An improved method for performing cardiac surgery whereby one uses cavo-atrial cannula to remove blood from the body while performing cardiac surgery. The cavo-atrial cannula has at least two sets of openings, a removable obturator, a curved tip, a closed terminus, an open terminus, and a bend. The cavo-atrial cannula has the first openings located adjacent to the curved tip and the second openings on the side opposite the bend. The cavo-atrial cannula contains various markings to indicate the correct positioning of the cavo-atrial cannula. The cavo-atrial cannula is inserted into the superior vena cava or inferior vena cava. The tip of the cavo-atrial cannula can lie in either the right atrium or the vena cava opposite from the insertion point, depending on the type of surgery being performed.

Claims

1. An improved method of draining blood from a body during cardiac surgery, said improvement comprising:

making an incision in a vena cava;

inserting a cavo-atrial cannula into said incision in said vena cava, wherein said cavo-atrial cannula has an open terminus, a closed terminus, a bend, a first openings wherein said first openings are located adjacent to said closed terminus, a second openings wherein said second openings are located on the side of said cannula opposite said bend, and a removable obturator capable of occluding said second openings;

positioning said cavo-atrial cannula such that said closed terminus is located in the right atrium;

securing said cavo-atrial cannula to said vena cava;

withdrawing said removable obturator from said cavo-atrial cannula through said open terminus; and

attaching said cavo-atrial cannula to tubing wherein said blood travels through said tubing to a device for oxygenation and return to the body.

2. The method of

claim 1

wherein said vena cava is the superior vena cava.

3. The method of

claim 1

wherein said vena cava is the inferior vena cava.

4. An improved method of draining blood from a body during cardiac surgery, said improvement comprising:

making an incision in the vena cava;

inserting a cavo-atrial cannula into said incision in said vena cava, wherein said cavo-atrial cannula has an open terminus, a closed terminus, a bend, a first openings wherein said first openings are located adjacent to said closed terminus, a second openings wherein said second openings are located on the side of said cannula opposite said bend, a third openings wherein said third openings are located between said first openings and said second openings, and a removable obturator capable of occluding said second openings;

positioning said cavo-atrial cannula such that said closed terminus is located in the right atrium;

securing said cavo-atrial cannula to said vena cava;

withdrawing said removable obturator from said cavo-atrial cannula through said open terminus; and

attaching said cavo-atrial cannula to tubing wherein blood travels through said tubing to a device for oxygenation and return to the body.

5. The method of

claim 4

wherein said vena cava is the superior vena cava.

6. The method of

claim 4

wherein said vena cava is the inferior vena cava.

7. An improved method of draining blood from a body during cardiac surgery, said improvement comprising:

making an incision in the superior vena cava;

inserting a cavo-atrial cannula into said incision in said vena cava, wherein said cavo-atrial cannula has an open terminus, a closed terminus, a bend, a first openings wherein said first openings are located adjacent to said closed terminus, a second openings wherein said second openings are located on the side of said cannula opposite said bend, and a removable obturator capable of occluding said second openings;

positioning said cavo-atrial cannula such that said closed terminus is located in the inferior vena cava;

securing said cavo-atrial cannula to said superior vena cava;

withdrawing said removable obturator from said cavo-atrial cannula through said open terminus;

attaching said cavo-atrial cannula to tubing wherein said blood travels through said tubing to a device for oxygenation and return to the body; and

applying at least one tourniquet around said superior vena cava and said inferior vena cava.

8. An improved method of draining blood from a body during cardiac surgery, said improvement comprising:

making an incision in the inferior vena cava;

inserting a cavo-atrial cannula into said incision in said vena cava, wherein said cavo-atrial cannula has an open terminus, a closed terminus, a bend, a first openings wherein said first openings are located adjacent to said closed terminus, a second openings wherein said second openings are located on the side of said cannula opposite said bend, and a removable obturator capable of occluding said second openings;

positioning said cavo-atrial cannula such that said closed terminus is located in the superior vena cava;

securing said cavo-atrial cannula to said superior vena cava;

withdrawing said removable obturator from said cavo-atrial cannula through said open terminus;

attaching said cavo-atrial cannula to tubing wherein said blood travels through said tubing to a device for oxygenation and return to the body; and

applying at least one tourniquet around said superior vena cava and said inferior vena cava.