초록 ▼

A method for providing at least partial bypass of the heart to supplement the pumping function of the heart to thereby enable the surgeon to perform various surgical procedures thereon includes providing a circulatory assist system having a portable extracorporeal axial flow pump with a pump housing

A method for providing at least partial bypass of the heart to supplement the pumping function of the heart to thereby enable the surgeon to perform various surgical procedures thereon includes providing a circulatory assist system having a portable extracorporeal axial flow pump with a pump housing, a rotating pumping member disposed in the pump housing and inlet and outlet cannulated tubes respectively connected to inlet and outlet ports of the pump housing, accessing the patient's left atrium of the heart with the inlet cannulated tube, accessing the aorta with the outlet cannulated tube, actuating the rotating pumping member to draw oxygenated blood from the left atrium of the heart through the lumen of the inlet cannulated tube and into the inlet port of the pump housing whereby the pumping member imparts mechanical energy to the oxygenated blood passing through the pump housing and directs the oxygenated blood through the outlet port and through the lumen of the outlet cannulated tube to be transferred by the aorta to the systemic arteries and permitting the right side of the heart to function whereby oxygen-depleted blood returning through the systemic veins to the right atrium is directed through the right ventricle to the patient's lungs for oxygenation and subsequent pulmonary circulation.

대표청구항 ▼

[ What is claimed is:] [1.] A circulatory support system to supplement or temporarily replace the pumping function of a patient's heart to thereby enable a surgeon to perform surgical procedures thereon, comprising:an extracorporeal portable axial flow pump having inlet and outlet ports, a motor and

[ What is claimed is:] [1.] A circulatory support system to supplement or temporarily replace the pumping function of a patient's heart to thereby enable a surgeon to perform surgical procedures thereon, comprising:an extracorporeal portable axial flow pump having inlet and outlet ports, a motor and a rotating member rotatably mounted in the pump housing to impart mechanical energy to blood entering the inlet port and to direct the blood through the outlet port;an inlet cannula connected to the inlet port of the pump housing and having an inlet open end portion dimensioned for insertion within the patient's heart or blood vessel associated with the heart so that blood is drawn from the patient through a lumen of the inlet cannula and directed into the pump housing;an outlet cannula connected to the outlet port of the pump housing and having an outlet end portion dimensioned for insertion within the patient so that blood exiting the outlet port of the pump housing is conveyed through a lumen of the outlet cannulated tube into the patient for transfer by the arterial system of the patient;a control unit having a processor, operatively coupled to the flow pump, for controlling operation thereof,an air bubble sensor mounted to one of the cannulas for detecting air bubbles in the respective cannula and providing a bubble detect signal indicative of the presence of an air bubble;a clamping device mounted to one of the cannulas and operative to clamp down on the respective cannula when the bubble detect signal is generated to prevent air from entering the patient's bloodstream;wherein the control unit is operative, responsive to receiving a bubble detect signal, to generate first and second signals, the first signal being an alarm signal to produce an air bubble alarm and the second signal being a motor control signal to shut down the motor to cause rotation of the rotating member of the pump to cease.