Patent ID: 7678098
Filing Date: 2010-03-16
Classification: A61M

Abstract:
1. A cardiopulmonary bypass system comprising: a venous cannula configured for withdrawing oxygen-depleted blood from a patient, the venous cannula having an elongated tubular body configured for insertion into a central venous location in the patient via a peripheral venous access site, the elongated tubular body having a proximal end and a distal end and a central lumen extending from the proximal end to the distal end, a proximal connector in fluid connection with the central lumen attached to the proximal end of the elongated tubular body, the proximal connector being configured for connecting to an inlet of a cardiopulmonary bypass machine, a distal end hole in fluid connection with the central lumen, a plurality of distal side ports in fluid connection with the central lumen configured to withdraw blood from the patient's right auricle and/or superior vena cava, a plurality of proximal side ports in fluid connection with the central lumen configured to withdraw blood from the patient's inferior vena cava, the elongated tubular body having an imperforate section separating the distal side ports from the proximal side ports, wherein the venous cannula has sixteen distal side ports arranged in four groups of four distal side ports along the distal portion of the elongated tubular body, each group of four distal side ports being evenly distributed at approximately 90 degree spacing from one another around the outer circumference of the elongated tubular body, the distal side ports of each group of four distal side ports being offset by 45 degrees from each adjacent group of four distal side ports; and wherein the venous cannula has twelve proximal side ports arranged in three groups of four proximal side ports along the proximal portion of the elongated tubular body, each group of four proximal side ports being evenly distributed at approximately 90 degree spacing from one another around the outer circumference of the elongated tubular body, the proximal side ports of each group of four proximal side ports being offset by 45 degrees from each adjacent group of four proximal side ports; a multichannel catheter configured for returning oxygen-rich blood to the patient, the multichannel catheter having an elongated catheter body including a first channel defined by a surrounding wall extending substantially the length of the catheter, the first channel being closed at its distal end and having a proximal end configured for connecting to an outlet of a cardiopulmonary bypass machine, a plurality of openings for outflow of blood in the wall of the catheter near the distal end of the catheter and communicating only with the first channel; a second channel extending substantially the length of the catheter parallel to the first channel but independent thereof, the second channel being open at its distal end; a third channel extending substantially the length of the catheter parallel to the first and second channels but independent thereof; and an inflatable member located on the distal end of the catheter between the first channel openings for the outflow of blood and the second channel distal opening and with a distal opening of the third channel in fluid communication with the interior of the inflatable member.