Multichannel catheter
A single, multichannel catheter is useful for extracorporeal circulation of blood to a patient undergoing cardiovascular treatments or surgery. The catheter has three independent channels and an expandable balloon at one end of the catheter. The first channel is largest and allows for delivery of blood to a patient in an amount sufficient to maintain the patient's metabolism and perfusion throughout the treatment or surgery. The second and third channels are smaller and integrated into the wall of the first channel. The second channel is for delivering a biologically active fluid to the heart and/or venting the left heart. The third channel is for delivering a fluid to the balloon for its expansion when positioned in the ascending aorta to occlude the flow of blood to the heart. One or more perfusion openings may be located in the descending aorta.
1. A single multichannel catheter useful for delivering extracorporeal blood to a mammalian patient in need thereof wherein the catheter has defined length and available channel volume with distal and proximal ends and comprises:
at least three independent channels and an expandable balloon at one end of the catheter,
a first largest channel defined by a surrounding wall and of a size to allow delivery of an amount of blood to the patient that is sufficient to support the patient's metabolism and perfusion throughout the delivery of blood to the patient,
a second channel, smaller than the first channel and integrated into the wall of the first channel, the second channel suitable for (a) drug delivery to the heart, (b) accepting accessory surgical devices and providing a pathway for the accessory surgical devices to the heart, and (b) venting the left heart,
a third channel also smaller than the first channel and integrated into the wall of the first channel, the third channel is suitable for delivery of a fluid to the balloon for its expansion when positioned in the ascending aorta to occlude the flow of blood to the heart from the first channel, and wherein a plurality of openings for the outflow of blood, all of which are located in the wall of the catheter, communicate only with the first channel, and
a removable insertion stylet configured to be received within the first channel,
whereby the insertion stylet prevents blood from entering the first channel until the insertion stylet is removed.