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21. 发明授权

US5053747A Ultrasonic air-in-line detector self-test technique 失效
标题翻译：超声空气检测器自检技术
公开(公告)号：US5053747A
公开(公告)日：1991-10-01
申请号：US403259
申请日：1989-09-05
申请人： John B. Slate , James L. Henke
发明人： John B. Slate , James L. Henke
IPC分类号： G01N29/00 , A61M5/00 , A61M5/36 , G01H3/00 , G01N29/036 , G01V1/00
CPC分类号： G01H3/005 , A61M5/365 , G01N29/036 , G01V1/001 , A61M2205/702 , G01N2291/02433 , Y10S128/06 , Y10S128/13 , Y10S128/912
摘要： An ultrasonic air-in-line detection system for use in detecting air bubbles in the fluid line of a disposable cassette mounted on a main pump unit is disclosed in which a self-test procedure is periodically used to ensure that any faults in the ultrasonic air-in-line detector which do not fail safe are automatically detected. After a pumping cycle is completed, if the ultrasonic air-in-line detector indicates that there is fluid in the fluid line at the location of the ultrasonic sensor, the operating frequency of the transmitting ultrasonic transducer is changed to a non-resonant frequency for the self-test procedure. If the ultrasonic air-in-line detector still produces a signal indicating that there is fluid in the line, this indicates that there is a failure in the ultrasonic detector and a fault is indicated and the system is shut down.

22. 发明授权

US4863425A Patient-side occlusion detection system for a medication infusion system 失效
标题翻译：用于药物输注系统的患者侧闭塞检测系统
公开(公告)号：US4863425A
公开(公告)日：1989-09-05
申请号：US129013
申请日：1987-12-04
申请人： John B. Slate , James L. Henke
发明人： John B. Slate , James L. Henke
IPC分类号： A61M5/00 , A61M5/168 , G05D16/20
CPC分类号： A61M5/16854 , A61M2005/16868
摘要： A system for detecting an occlusion in a fluid line is disclosed which can detect occlusions in the downstream or patient side of a disposable cassette containing a fluid pump thereon. The cassette includes a pressure diaphragm and is for installation onto and use with a main pump unit including a pressure transducer therein for monitoring fluid pressure downstream of the pump. The system utilizes control circuitry to provide an alarm in the event of a patient-side occlusion, and the occlusion detection system works when the system is configured as any of a number of difference device types, including both a flow controller emulation and several different infusion pump configurations.

23. 发明授权

US5064412A Ultrasonic air-in-line detector for a medication infusion system 失效
标题翻译：用于输液系统的超声空中检测器
公开(公告)号：US5064412A
公开(公告)日：1991-11-12
申请号：US403512
申请日：1989-09-05
申请人： James L. Henke , Paul A. Koenig
发明人： James L. Henke , Paul A. Koenig
IPC分类号： G01N29/00 , A61M5/00 , A61M5/36 , G01N29/032
CPC分类号： A61M5/365 , G01N29/032 , G01N29/4454 , Y10S128/13
摘要： An ultrasonic air-in-line detection system for use in detecting air bubbles in the fluid line of a disposable cassette mounted on a main pump unit is disclosed which can accurately detect air bubbles in any type of fluid, whether clear or opaque. The system uses a windowing technique to determine when a threshold amount of air bubbles in a predetermined volume of material pumped occurs, with the alarm being sounded only when this threshold amount of air bubbles is present in the window volume. The system of the present invention thus avoids so-called nuisance alarms due to the presence of small isolated air bubbles in the fluid due to the fluid pumped not having been degassed.

24. 发明授权

US4919596A Fluid delivery control and monitoring apparatus for a medication infusion system 失效
标题翻译：用于药物输注系统的流体输送控制和监测装置
公开(公告)号：US4919596A
公开(公告)日：1990-04-24
申请号：US344494
申请日：1989-04-26
申请人： John B. Slate , James L. Henke
发明人： John B. Slate , James L. Henke
IPC分类号： A61M5/142 , A61M5/168 , A61M5/172 , G05D7/06
CPC分类号： G05D7/0688 , A61M5/172 , A61M5/14216 , A61M5/16827
摘要： A fluid delivery monitoring and control apparatus for use in a medication infusion system is designed for use with a disposable fluid pathway that incorporates a sterile cassette containing pumping elements and sensor interfaces. The apparatus comprises a multi-segment drive mechanism, controller, and monitoring system. Fluid pumping is accomplished by controlling DC motors in the drive mechanism, each of which is coupled to two valves and a reciprocating piston for an individual pumping channel in the cassette. The motor is geared down to provide an appropriate maximum speed and torque. A cam sequentially actuates an inlet valve, piston, and an outlet valve in the cassette. A range of fluid delivery rates is achieved by periodically sending pulses to the motor. The output flow rate of the pump is maintained by a digital feedback controller which uses closed-loop feedback control to provide accurate regulation. At regular time intervals, the controller computes the motor voltage pulse width based upon feedback information from an encoder.
摘要翻译：用于药物输注系统中的流体输送监测和控制装置被设计成与包含含有泵送元件和传感器接口的无菌盒的一次性流体通道一起使用。该装置包括多段驱动机构，控制器和监控系统。流体泵送通过控制驱动机构中的DC电动机来实现，驱动机构中的每一个联接到两个阀和用于盒中的单独泵送通道的往复活塞。马达被减速以提供适当的最大速度和扭矩。凸轮顺序地致动盒中的入口阀，活塞和出口阀。通过周期性地向电动机发送脉冲来实现一定范围的流体输送速率。泵的输出流量由数字反馈控制器维持，该控制器采用闭环反馈控制来提供精确的调节。以规律的时间间隔，控制器根据来自编码器的反馈信息计算电机电压脉冲宽度。

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