Retrograde coronary sinus perfusion device and method

Claim 2

A retrograde coronary sinus perfusion device for a patient comprising: a multiple lumen catheter, a portion of which is to be inserted into the coronary sinus of said patient's heart, said catheter including first and second lumens and a tip end which is inserted into the coronary sinus; a ballon surrounding said catheter at a distance from said multiple lumen catheter tip end preset to at least substantially the length of said catheter portion to be inserted into the coronary sinus, said multiple lumen catheter portion including a flow path between said balloon and said first lumen so that gas in said first lumen may inflate said ballon; a reservoir of blood coupled to a distal end of said second lumen of said multiple lumen catheter opposite to said tip end, said reservoir including means for providing a supply of blood into the coronary sinus from said second lumen at a relatively constant pressure, said blood supply providing means including entrance means for allowing blood to enter said reservoir, and a ball float valve positioned proximate said entrance means to keep the level of blood in said reservoir relatively constant by controlling the supply of blood into said reservoir; and a balloon pump coupled to said first lumen to force gas into said first lumen at a rate synchronized with the pulse rate of said heart.

Claim 3

The device of claim 1 further including a supply catheter connected between an artery of said patient and said reservoir to supply blood to said reservoir.

Claim 4

The device of claim 2 further including a pump coupled to said supply catheter to pump blood from said artery to said reservoir through said catheter.

Claim 5

The device of claim 1 wherein said multiple lumen catheter is tapered downward from said balloon to said tip end.

Claim 6

The device of claim 1 wherein said balloon pump sets the pressure in said balloon approximately equal to the pressure from said reservoir.

Claim 7

The device of claim 1 wherein said balloon is located on said catheter to coincide with the valve of said coronary sinus when said catheter is properly inserted into said sinus.

Claim 8

A retrograde coronary perfusion device for a patient comprising: a multiple lumen catheter, a portion of which is to be inserted into the coronary sinus of said patient's heart, said catheter including first and second lumens and a tip end which is inserted into the coronary sinus; a two-chambered balloon surrounding said multiple lumen catheter at a distance from said tip end approximately equal to the portion of said multiple lumen catheter to be inserted into the coronary sinus such that said balloon and the valve of said coronary sinus coincide when said catheter is properly inserted in said sinus, said multiple lumen catheter containing a flow path between said balloon and said first lumen so that gas in said first lumen may inflate said balloon; a reservoir of blood coupled to a distal end of said second lumen of said multiple lumen catheter opposite to said tip end, said reservoir including means for providing a supply of blood into the coronary sinus from said second lumen at a relatively constant pressure, said blood supply providing means including entrance means for allowing blood to enter said reservoir, and a ball float valve positioned proximate said entrance means to keep the level of blood in said reservoir relatively constant by controlling the supply of blood to said reservoir; and a balloon pump coupled to said first lumen to force gas into said first lumen at a rate synchronized with the pulse rate of said heart.

Claim 9

A retrograde coronary perfusion device for a patient comprising: a multiple lumen catheter, a portion of which is to be inserted into the coronary sinus of said patient's heart, said catheter including first and second lumens and a tip end which is inserted into the coronary sinus; a two-chambered balloon surrounding said multiple lumen catheter at a distance from said tip end approximately equal to the portion of said multiple lumen catheter to be inserted into the coronary sinus such that said balloon and the valve of said coronary sinus coincide when said catheter is properly inserted in said sinus, said multiple lumen catheter containing a flow path between said balloon and said first lumen so that gas in said first lumen may inflate said balloon; a reservoir of blood coupled to a distal end of said second lumen of said multiple lumen catheter opposite to said tip end, said reservoir including means for providing a supply of blood into the coronary sinus from said second lumen at a relatively constant pressure, said blood supply providing means including entrance means for allowing blood to enter said reservoir, and a ball float valve positioned proximate said entrance means to keep the level of blood in said reservoir relatively constant by controlling the supply of blood to said reservoir; and a balloon pump coupled to said first lumen to force gas into said first lumen at a rate synchronized with the pulse rate of said heart.

Claim 10

The device of claim 7 wherein a first chamber of said two-chambered balloon is located closer to said tip end of said multiple lumen catheter than a second chamber of said two-chambered balloon and wherein said first and second chambers are constructed such that when gas is supplied from said first lumen, said first chamber inflates before said second chamber inflates.

Claim 11

The device of claim 7 wherein a first chamber of said two-chambered balloon is located closer to said tip end of said multiple lumen catheter than a second chamber, said first chamber having a second elasticity and including means for pushing said first balloon toward said tip end when said second chamber inflates.

Claim 12

The device of claim 7 further including means on said catheter for fixing said multiple lumen catheter in said coronary sinus.

Claim 13

The device of claim 10 where in said fixing means includes a positioning balloon on said multiple lumen catheter between said tip end and said two-chambered balloon, and wherein said multiple lumen catheter includes a third lumen and a flow path between said positioning balloon and said third lumen.

Claim 16

The method in claim 12 further including the step of pumping blood from an artery of said patient into said reservoir.

Claim 17

The method in claim 15 wherein said blood pumping step includes the step of using an externally-controlled pump to pump blood to said reservoir.

Claim 18

The method of claim 14 wherein said inflating step includes the step of inflating said balloon to the pressure on said blood from said reservoir.

Claim 19

The method in claim 14 wherein said inflating step includes the step of completely blocking the coronary sinus when said balloon is inflated.

Claim 20

The method of claim 16 wherein said inflating step includes the step of inflating a two-chambered balloon positioned adjacent said coronary sinus valve.

Claim 21

The method of claim 17 wherein said two-chambered balloon inflating step includes the steps of inflating a first chamber of said two-chambered balloon before a second chamber of said two chambered balloon, said first chamber being located closer to said tip end than said second chamber.

Claim 22

The method of claim 17 wherein said two-chambered balloon inflating step includes the steps of maintaining a first chamber of said two-chambered balloon inflated while said multiple lumen catheter is inserted into said coronary sinus, and inflating a second chamber of said two-chambered balloon in synchronism with said heart rate so, when inflated, said second chamber presses against said first chamber.

Claim 23

The method of claim 12 further including the step of fixing said multiple lumen catheter in said coronary sinus by inflating a positioning ballon.