-
公开(公告)号：DE69723936D1
公开(公告)日：2003-09-11
申请号：DE69723936
申请日：1997-01-23
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE , MATTHEWS JOSEPH , 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 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.
-
公开(公告)号：DE69030254T2
公开(公告)日：1997-10-30
申请号：DE69030254
申请日：1990-11-28
Applicant: BAXTER INT
Inventor： MATTHEWS JOSEPH , BOWMAN GEORGE
-
公开(公告)号：DE69022586T2
公开(公告)日：1996-05-30
申请号：DE69022586
申请日：1990-11-28
Applicant: BAXTER INT
Inventor： MATTHEWS JOSEPH , BOWMAN GEORGE
Abstract: The present invention provides a drive signal for a peristaltic pump motor. A first circuit is provided which generates a first series of pulses at a given frequency. A second circuit is provided which generates a second series of pulses having a frequency higher than the frequency of the first series of pulses. A third circuit is provided which generates a third series of pulses having a frequency between the frequency of the first and second series of pulses. Finally, a circuit is provided which combines the three series of pulses into a drive signal. The drive signal length is determined by the frequency of the first series of pulses. The drive signal further is divided into two sections, an initial pulse stage determined by the frequency of the third series of pulses, and a modulated pulse stage being a series of pulses determined by the frequency of the second series of pulses.
-
公开(公告)号：NZ329317A
公开(公告)日：1999-06-29
申请号：NZ32931797
申请日：1997-01-23
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE , MATTHEWS JOSEPH , 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 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.
-
公开(公告)号：CA2223972A1
公开(公告)日：1997-10-16
申请号：CA2223972
申请日：1997-01-23
Applicant: BAXTER INT
Inventor： EYSTER KURT , MATTHEWS JOSEPH , BOWMAN GEORGE
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.
-
Patent Agency Ranking
公开(公告)号：DE69723936T2
公开(公告)日：2004-06-03
申请号：DE69723936
申请日：1997-01-23
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE , MATTHEWS JOSEPH , 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 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.
-
公开(公告)号：DK0837709T3
公开(公告)日：2003-11-24
申请号：DK97903028
申请日：1997-01-23
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE , MATTHEWS JOSEPH , 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 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.
-
公开(公告)号：AU1705497A
公开(公告)日：1997-10-29
申请号：AU1705497
申请日：1997-01-23
Applicant: BAXTER INT
Inventor： BOWMAN GEORGE , MATTHEWS JOSEPH , 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 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.
-
公开(公告)号：DE69022586D1
公开(公告)日：1995-10-26
申请号：DE69022586
申请日：1990-11-28
Applicant: BAXTER INT
Inventor： MATTHEWS JOSEPH , BOWMAN GEORGE
Abstract: The present invention provides a drive signal for a peristaltic pump motor. A first circuit is provided which generates a first series of pulses at a given frequency. A second circuit is provided which generates a second series of pulses having a frequency higher than the frequency of the first series of pulses. A third circuit is provided which generates a third series of pulses having a frequency between the frequency of the first and second series of pulses. Finally, a circuit is provided which combines the three series of pulses into a drive signal. The drive signal length is determined by the frequency of the first series of pulses. The drive signal further is divided into two sections, an initial pulse stage determined by the frequency of the third series of pulses, and a modulated pulse stage being a series of pulses determined by the frequency of the second series of pulses.
-
公开(公告)号：CA2223972C
公开(公告)日：2003-04-15
申请号：CA2223972
申请日：1997-01-23
Applicant: BAXTER INT
Inventor： MATTHEWS JOSEPH , EYSTER KURT , BOWMAN GEORGE
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 ul- trasonic transmitter and ultrasonic re- ceiver are separated by the IV tube. The apparatus further provides cir- cuit means for generating at least two transmitting signals to actuate the ul- trasonic 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 appara- tus further relies on logarithmic de- tection of air in fluids rather than lin- ear detection which provides a larger safety factor in prediction of air em- bolus.
-
-
-
-
-
-
-
-
-
Search Results
12
records
(took 0.02 seconds)
