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公开(公告)号：DE69002674T2
公开(公告)日：1994-03-17
申请号：DE69002674
申请日：1990-04-24
Applicant: SHARP KK , BAXTER INT
Inventor： GOI NOBUAKI , BOWMAN GEORGE A , MATTHEWS JOSEPH B
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公开(公告)号：AU645710B2
公开(公告)日：1994-01-20
申请号：AU2180092
申请日：1992-06-05
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE A , GOLOSKI LEONARD F SR
Abstract: The present invention provides an improved, low cost method and apparatus for monitoring the intravenous metering of fluids to a patient. The present invention provides a strain gauge which is preferably a balanced metal beam. Conditioning circuitry is provided which has as input the strain gauge output. The output of the conditioning circuit is inputted into occlusion sensing circuit. The output of occlusion sensing circuit is inputted into an air sensing circuit. The output of both the occlusion sensing circuit and the air sensing circuit are inputted into an analog to digital convertor which is monitored by a microprocessor for abnormal signals.
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公开(公告)号：CA2047231C
公开(公告)日：2001-10-02
申请号：CA2047231
申请日：1990-11-28
Applicant: BAXTER INT
Inventor： MATTHEWS JOSEPH B , BOWMAN GEORGE A
Abstract: An encoder wheel (60) is provided for monitoring a peristaltic pump (20). Th e encoder wheel (60) provides a plurality of equispaced sectors (62) and a reference sector (66) provided at the outer radius of the encoder wheel (60). A vane slit (68) is pro- vided radially offset from the sectors (62, 66). A pair of optical couplers (72, 74) are provided to read the sectors (62, 66) and the vane slit (68).
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公开(公告)号：HK1002291A1
公开(公告)日：1998-08-14
申请号：HK98101116
申请日：1998-02-12
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE A , ESCHE GRACE
Abstract: The present invention provides an estimate of the amount of time left on the battery by monitoring not only the voltage available from the battery, but also the amount of current flowing from the battery. It has been found that periodic sampling of the battery voltage and current drain enables accurate battery monitoring. The sampling technique alternates between sampling battery voltage and sampling current drain. An electric circuit is provided which enables the cost-effective sampling to occur. A method is then applied to the sampling signals by a microprocessor which determines the amount of time left under battery power. In a preferred embodiment, a graphic representation is provided of the amount of battery time left.
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公开(公告)号：DE69030132D1
公开(公告)日：1997-04-17
申请号：DE69030132
申请日：1990-04-24
Applicant: SHARP KK , BAXTER INT
Inventor： SAKAI EIICHI , BOWMAN GEORGE A , D SILVA EDMUND D
Abstract: An air detector (13) according to the present invention utilizes a unitary type sensor for detecting air bubbles or columns in an infusion solution flowing through a tube (23). Because of a unique design for a tube-receiving groove (15) and a cooperating abutting nember (25), the difficulty in loading a tube heretofore encountered with the use of unitary type sensor is obviated. Thus, the tube can be loaded in the air detector easily with good reliability.
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Patent Agency Ranking
公开(公告)号：GB2312049B
公开(公告)日：2001-01-10
申请号：GB9614161
申请日：1996-07-05
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE A , ESCHE GRACE
Abstract: The present invention provides an estimate of the amount of time left on the battery by monitoring not only the voltage available from the battery, but also the amount of current flowing from the battery. It has been found that periodic sampling of the battery voltage and current drain enables accurate battery monitoring. The sampling technique alternates between sampling battery voltage and sampling current drain. An electric circuit is provided which enables the cost-effective sampling to occur. A method is then applied to the sampling signals by a microprocessor which determines the amount of time left under battery power. In a preferred embodiment, a graphic representation is provided of the amount of battery time left.
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公开(公告)号：HK1004819A1
公开(公告)日：1998-12-11
申请号：HK98102355
申请日：1998-03-19
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE A , MATTHEWS JOSEPH B , EYSTER KURT
IPC: A61M5/00 , A61M5/36 , G01F1/00 , G01F13/00 , G01N29/00 , G01N29/02 , G01N29/032 , G01N29/34 , G01N , A61M
Abstract: The present invention provides an apparatus for detecting excessive air in a liquid flow-through tube. The apparatus includes an ultrasonic transmitter for transmitting ultrasonic signals and an ultrasonic receiver for receiving ultrasonic signals. The ultrasonic transmitter and ultrasonic receiver are separated by the IV tube. The apparatus further provides circuit means for generating at least two transmitting signals to actuate the ultrasonic transmitter and circuit means for detecting received signals. Means are provided for determining whether the received signal is indicative of air or liquid in the IV tube. The apparatus further relies on logarithmic detection of air in fluids rather than linear detection which provides a larger safety factor in prediction of air embolus.
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公开(公告)号：GB2312046A
公开(公告)日：1997-10-15
申请号：GB9614624
申请日：1996-07-11
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE A , MATTHEWS JOSEPH B , EYSTER KURT
Abstract: The present invention provides an apparatus for detecting excessive air in a liquid flow-through tube. The apparatus includes an ultrasonic transmitter 146 for transmitting ultrasonic signals and an ultrasonic receiver 172 for receiving ultrasonic signals. The ultrasonic transmitter and ultrasonic receiver are separated by the IV tube. The apparatus further provides circuit means 301 for generating at least two transmitting signals to actuate the ultrasonic transmitter and circuit means for detecting received signals. Means are provided for determining whether the received signal is indicative of air or liquid in the IV tube. The apparatus further relies on logarithmic detection of air in fluids rather than linear detection which provides a larger safety factor in prediction of air embolus.
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公开(公告)号：DE69005924D1
公开(公告)日：1994-02-24
申请号：DE69005924
申请日：1990-06-27
Applicant: SHARP KK , BAXTER INT
Inventor： KAWAHARA MASAFUMI , BOWMAN GEORGE A , MATTHEWS JOSEPH B
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公开(公告)号：DE69002674D1
公开(公告)日：1993-09-16
申请号：DE69002674
申请日：1990-04-24
Applicant: SHARP KK , BAXTER INT
Inventor： GOI NOBUAKI , BOWMAN GEORGE A , MATTHEWS JOSEPH B
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