# US 5,707,358 A · Dual concentric balloon catheter for retrograde cardioplegia perfusion

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- Number: US 5,707,358 A
- Document ID: US5707358A
- Status: Granted
- Kind: A
- Application number: 08/645,309
- Filed: 1996-05-13
- Granted: 1998-01-13
- Earliest claimed: 1996-05-13
- Inventors: John T. M. Wright
- Web page: https://patentgrep.com/patent/US5707358A

## CPC

- A61M 25/1011: {Multiple balloon catheters}
- A61M 2025/1013: {with concentrically mounted balloons, e.g. being independently inflatable}
- A61M 2025/1095: {with perfusion means for enabling blood circulation while the balloon is in an inflated state or in a deflated state, e.g. permanent by-pass within catheter shaft}
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A perfusion catheter for use in open heart surgery having inner and outer concentric balloons adjacent to the distal end of the catheter wherein the inner balloon is a cuff that may be inflated by a syringe using either air or liquid via a second lumen in the catheter, the outer balloon self-inflating when perfusion liquid flows through the catheter, and a third and lumen of the catheter to monitor the infusion pressure at the distal end of the catheter, is disclosed.

## Claims

### Claim 1

A cardioplegia catheter for use in cardiac surgery comprising, in combination:
an elongate flexible tube of biocompatible material having a length and a proximal end for, in use, dwelling outside the patient's heart and a distal end for, in use, dwelling in the coronary sinus of the patient, said tube defining at least first and second lumina lengthwise there through;
a cardioplegia connector proximate the proximal end of the tube for selectively introducing cardioplegia into the first lumen;
a first expandable balloon having an exterior and an interior encompassing a portion of the tube proximate the distal end of the tube, the tube being so constructed and configured as to define a first passage from the first lumen to the exterior of the tube proximate the distal end thereof for directing cardioplegia into the coronary sinus of the patient and a second passage from the first lumen in fluid communication with the interior of the first expandable balloon for directing cardioplegia into the said first balloon for expanding the same;
a fluid pressure connector proximate the proximal end of the tube for selectively applying fluid into the second lumen of the tube; and
a second expandable balloon having an exterior and an interior encompassing a portion of the tube inside of the first expandable balloon, the tube being so constructed and configured as to define a third passage from the second lumen in fluid communication with the interior of the second balloon for applying fluid pressure from the fluid pressure connector to the interior of the second balloon for selectively inflating said balloon to a desired pressure.

### Claim 2 (depends on 1)

The cardioplegia catheter of claim 1 wherein:
the tube is so constructed and configured as to define a third lumen through the length thereof and a fluid passage from the third lumen opening into the coronary sinus of the patent, when the catheter is in use; and
further comprising a pressure sensing connector proximate the proximal end of the catheter for sensing the pressure in the patient's coronary sinus through the third lumen.

### Claim 3

A cardioplegia catheter for use in cardiac surgery comprising, in combination:
an elongate flexible tube of biocompatible material having a length and a proximal end for, in use, dwelling outside the patient's heart and a distal end for, in use, dwelling in the coronary sinus of the patient, said tube defining at least first and second lumina lengthwise there through;
a cardioplegia connector proximate the proximal end of the tube for selectively introducing cardioplegia into the first lumen;
a first expandable balloon having an exterior and an interior encompassing a portion of the tube proximate the distal end of the tube, the tube being so constructed and configured as to define a first passage from the first lumen to the exterior of the tube proximate the distal end thereof for directing cardioplegia into the coronary sinus of the patient and a second passage from the first lumen in fluid communication with the interior of the first expandable balloon for directing cardioplegia into the said first balloon for expanding the same;
a fluid pressure connector proximate the proximal end of the tube for selectively applying fluid into the second lumen of the tube; and
a second expandable balloon having an exterior and an interior encompassing a portion of the tube, the tube being so constructed and configured as to define a third passage from the second lumen in fluid communication with the interior of the second balloon for applying fluid pressure from the fluid pressure connector to the interior of the second balloon for selectively inflating said balloon to a desired pressure.

### Claim 4 (depends on 3)

The cardioplegia catheter of claim 3 wherein:
the tube is so constructed and configured as to define a third lumen through the length thereof and a fluid passage from the third lumen opening into the coronary sinus of the patent, when the catheter is in use; and
further comprising a pressure sensing connector proximate the proximal end of the catheter for sensing the pressure in the patient's coronary sinus through the third lumen.

### Claim 5

A multiple lumen catheter comprising a tube having a length and proximal and distal ends that defines at least first and second lumina, first and second balloons secured on said tube proximate the distal end thereof, said tube defining a fluid passage from the first lumen to the first balloon and a second fluid passage from the second lumen to the second balloon, the tube being so constructed as to define a fluid flow path proximate the distal end of the tube from only one of said lumen to the exterior of the tube for introducing fluid from the catheter into a balloon and for passing fluid from the distal end of the tube.

### Claim 6

A multiple lumen catheter comprising a tube having a length and proximal and distal ends that defines at least first and second lumina, first and second balloons secured concentrically on said tube proximate the distal end thereof, said tube defining a fluid passage from the first lumen to the first balloon and a second fluid passage from the second lumen to the second balloon, the tube being so constructed as to define a fluid flow path proximate the distal end of the tube from only one of said lumen to the exterior of the tube for introducing fluid from the catheter into a balloon and for passing fluid from the distal end of the tube.

### Claim 7 (depends on 6)

The catheter of claim 6 wherein the second balloon is inside the first balloon and the tube defines a passage from the first lumen to the exterior of the tube.