초록 ▼

Pulsatile blood flow in a heart-lung machine is accomplished by pumping blood into a bladder at a constant rate, and cyclically emptying the bladder into aortic line of the heart-lung machine either by means of the bladder's own elasticity or by a mechanical compression mechanism which can be progra

Pulsatile blood flow in a heart-lung machine is accomplished by pumping blood into a bladder at a constant rate, and cyclically emptying the bladder into aortic line of the heart-lung machine either by means of the bladder's own elasticity or by a mechanical compression mechanism which can be programmed to simulate the human heartbeat.

대표청구항 ▼

[ We claim:] [1.] Apparatus for producing pulsatile blood flow in a heart-lung machine, comprising:a) an extracorporeal blood circuit having an expandable bladder;b) a blood intake connected to said bladderc) a pump connected to said extracorporeal blood circuit, said pump pumping a supply of blood

[ We claim:] [1.] Apparatus for producing pulsatile blood flow in a heart-lung machine, comprising:a) an extracorporeal blood circuit having an expandable bladder;b) a blood intake connected to said bladderc) a pump connected to said extracorporeal blood circuit, said pump pumping a supply of blood to said bladder at a substantially constant rate;d) a blood outlet for said bladder; ande) a pressure-sensitive valve having a hysteresis so as to open said blood outlet when the blood volume in said bladder rises to a first predetermined level, and to close said blood outlet when the blood volume in said bladder drops to a second predeteremined level.