公开(公告)号：US3890969A

公开(公告)日：1975-06-24

申请号：US43522374

申请日：1974-01-21

Applicant: BAXTER LABORATORIES INC

Inventor： FISCHEL HALBERT

IPC: A61M1/14 ,  A61M1/36 ,  A61M1/03

CPC classification number: A61M1/3624 ,  A61M1/3666 ,  Y10S128/03

Abstract: An emergency alertable gravity feed cardiopulmonary bypass system is disclosed in which a blood volume responsive transducer is utilized in returning oxygenated blood to a human circulatory system at a pumping rate corresponding to venous drainage or selected norms. The transducer is coupled to a standpipe and is responsive to a confined gas volume therein related to the blood volume in a first air evacuable, gravity fed, collapsible bag and is coupled to a rate setting control. Blood flow from the first bag is directed by a control responsive oxygenation pump through a membrane oxygenator and heat exchanger and air evacuable collapsible bag and a main pump before return to the patient. The oxygenation pump rate slaved to the main pump is greater than the gravity feed rate, and a pressure relieving conduit recirculates excess blood flow from the second bag to the first bag. Supervisory control of the flow rate of the main pump may be exercised by manual adjustment of the flow rate.

Abstract translation: 公开了一种紧急警报的重力饲料心肺分流系统，其中使用血容积响应换能器以将氧合血液以对应于静脉引流或选定标准的泵送速率将氧合血液返回给人类循环系统。 换能器联接到立管，并且响应于其中与第一空气可排出的重力供给的可折叠袋中的血液体积相关的限制气体体积并且耦合到速率设定控制。 来自第一袋的血液流通过控制响应的氧合泵通过膜氧合器和热交换器以及空气可排出的可折叠袋和主泵在返回到患者之前。 主泵所具有的氧合泵速率大于重力供给速率，并且减压导管将多余的血液从第二袋再循环到第一袋。 可以通过手动调节流量来对主泵的流量进行监控。

公开(公告)号：US3877843A

公开(公告)日：1975-04-15

申请号：US36196073

申请日：1973-05-21

Applicant: BAXTER LABORATORIES INC

Inventor： FISCHEL HALBERT

IPC: A01N1/02 ,  A61M1/10 ,  F04B49/06 ,  A61B19/00 ,  F04B43/00 ,  F15B21/02

CPC classification number: F04B49/06 ,  A01N1/0247 ,  A01N1/0289 ,  A61M1/1005 ,  A61M1/1006 ,  A61M1/1037 ,  A61M1/1086 ,  Y10S128/03

Abstract: A portable pulsatile pumping system simulates the pumping mechanism of a human heart in pumping fluid for such applications as organ perfusion systems. The pumping system includes a regulated source of pressurized gas, a pulsatile pump having an aorta chamber providing a sustained minimum diastolic pressure and a ventricle chamber providing a higher systolic pressure during a selectively variable part (1 to 99 percent) of each cyclic pumping action, the periodicity of which may be varied from 5 to 150 cycles per minute. The gas source is connected to the pump by a first adjustable pressure regulator to maintain the chosen diastolic pressure in the aorta chamber. The ventricle chamber is alternately coupled to gas pressure taken through a second pressure regulator and vented by a solenoid mechanism operated by a digital electronic timing control circuit. The digital electronic control system employs digital counters and selector switches to generate square wave pulses of varying duration and periodicity in a manner which provides both conservation of electrical battery energy and high reliability. At the same time, an optimum pumping system is achieved because the elasticity of the gas and connecting tubing are employed to smooth the sharp signal transitions.

Abstract translation: 便携式脉冲泵送系统模拟人体心脏在泵送流体中的泵送机制，用于器官灌注系统。 泵送系统包括调节压缩气体源，脉动泵，其具有提供持续最小舒张压的主动脉腔和在每个循环泵动作用的选择性可变部分（1至99％）期间提供较高收缩压的心室， 其周期可以从每分钟5到150个循环变化。 气源通过第一可调压力调节器连接到泵，以维持主动脉腔中选择的舒张压。 所述心室与所述第二压力调节器所采取的气体压力交替耦合，并由数字电子定时控制电路操作的螺线管机构排气。 数字电子控制系统采用数字计数器和选择器开关，以提供电池节能和高可靠性的方式产生不同持续时间和周期性的方波脉冲。 同时，由于使用气体和连接管的弹性来平滑尖锐的信号转换，所以实现了最佳的泵送系统。