US 5,695,457 A · Cardioplegia catheter system

Abstract

A catheter system is provided for accessing the coronary ostia transluminally from a peripheral arterial access site, such as the femoral artery, and for inducing cardioplegic arrest by direct infusion of cardioplegic solution into the coronary arteries. In a first embodiment, the catheter system is in the form of a single perfusion catheter with multiple distal branches for engaging the coronary ostia. In a second embodiment, multiple perfusion catheters are delivered to the coronary ostia through a single arterial cannula. In a third embodiment, multiple perfusion catheters are delivered to the coronary ostia through a single guiding catheter. In a fourth embodiment, multiple catheters are delivered to the coronary ostia through a single guiding catheter which has distal exit ports that are arranged to direct the perfusion catheters into the coronary ostia. In each embodiment, the catheters are equipped with an occlusion means at the distal end of the catheter for closing the coronary ostia and isolating the coronary arteries from the systemic blood flow. The occlusion means can take the form of an inflatable occlusion balloon cuff, a tapered occlusion device or an O-ring encircling the distal end of the catheter. An optional ventricular venting catheter can be included in the system for venting blood and fluids from the left ventricle of the heart. The catheter system is combined with a femoral-to-femoral cardiopulmonary bypass system to provide a system for cardioplegic arrest and total cardiopulmonary support during minimally invasive cardiac surgical procedures.

Claims23

Dependent claims

A perfusion catheter for inducing cardioplegic arrest in a patient's heart, said perfusion catheter comprising:

a shaft having a proximal end and a distal end, said distal end being sized for entering a patient's first coronary ostium, said catheter shaft having a length sufficient to allow said distal end to enter the first coronary ostium when said proximal end extends out of a peripheral artery of the patient;
a first occlusion member mounted to the shaft, the first occlusion member being sized to occlude the first coronary ostium;
a first lumen extending through the shaft, the first lumen having an inlet at said proximal end and a perfusion port positioned distal to said first occlusion member for infusing cardioplegic fluid into the patient's coronary ostium, and
an arterial cannula having a distal end which is adapted for introduction into the peripheral artery of said patient and an infusion lumen communicating with an opening in said arterial cannula for infusing blood into said peripheral artery of said patient, said arterial cannula having a fitting configured to connect said infusion lumen to a cardiopulmonary bypass system for returning oxygenated blood to the patient;
the shaft being slidably coupled to the arterial cannula.

2 more elements

A cardioplegia catheter system for occluding a patient's left and right coronary ostia, comprising:

a first catheter having a shaft, a first occluding member and a first lumen, the shaft having a proximal portion, a distal portion, a proximal end and a distal end, said distal portion being shaped to enter a patient's right coronary ostium when the proximal portion extends through a peripheral artery, said shaft having a length sufficient to allow said distal end to enter the right coronary ostium when the proximal portion extends through a peripheral artery, the first occlusion member being mounted to the shaft and being sized to occlude the right coronary ostium, the first lumen extending through the shaft and having an inlet at said proximal end and a perfusion port positioned distal to the first occlusion member;
a second catheter having a shaft, a second occluding member and a second lumen, the shaft having a proximal portion, a distal portion, a proximal end and a distal end, said distal portion being shaped to enter the patient's left coronary ostium when the proximal portion extends through the peripheral artery, said shaft having a length sufficient to allow said distal end to enter the left coronary ostium when the proximal portion extends through the peripheral artery, the second occlusion member being mounted to the shaft and being sized to occlude the left coronary ostium, the second lumen extending through the shaft and having an inlet at said proximal end and a perfusion port positioned distal to the second occlusion member;
and
an arterial cannula having a blood flow lumen configured to be coupled to an arterial return line of a cardiopulmonary bypass system for returning oxygenated blood to the patient;
first and second catheters extending through the arterial cannula and being slidably coupled to the arterial cannula.

2 more elements

Dependencies are inferred from the claim text.

Cardioplegia catheter system

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Cardioplegia catheter system

Life of this patent

Abstract

Claims23