Calibration system for blood pressure transducer
First Claim
1. In a physiological pressure transducing system having a monitor, a transducer assembly including a six contact first connector and bridge-type transducer element having four legs, two excitation leads and two signal leads between said monitor and said bridge, said leads being connected to four of said contacts, a calibration system comprising:
- a factory adjusted calibration resistor mounted on said transducer assembly and connected to the two remaining connector contacts,a monitor cable connected to said monitor and having six leads and a second connector for connecting said leads to said six contacts,a calibration unit connected in said monitor cable, said unit includinga shunt resistor having one side connected to one side of said calibration resistor,a switch connected between the other side of said shunt resistor and one side of one of said bridge legs,and means connecting the other side of said calibration resistor to the other side of said one bridge leg, whereby, closing of said switch connects said calibration and shunt resistors in series across said one bridge leg.
6 Assignments
0 Petitions
Accused Products
Abstract
A system for calibrating a blood pressure transducer and monitor combination. The transducer assembly has a calibration resistor. The monitor cable has a housing which contains a switch and a shunt resistor. Electrical connections are provided to place the calibration resistor and shunt resistor in series with each other and in shunt across one leg of a transducer bridge to produce a reading of 100 mmHg on the monitor.
43 Citations
6 Claims
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1. In a physiological pressure transducing system having a monitor, a transducer assembly including a six contact first connector and bridge-type transducer element having four legs, two excitation leads and two signal leads between said monitor and said bridge, said leads being connected to four of said contacts, a calibration system comprising:
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a factory adjusted calibration resistor mounted on said transducer assembly and connected to the two remaining connector contacts, a monitor cable connected to said monitor and having six leads and a second connector for connecting said leads to said six contacts, a calibration unit connected in said monitor cable, said unit including a shunt resistor having one side connected to one side of said calibration resistor, a switch connected between the other side of said shunt resistor and one side of one of said bridge legs, and means connecting the other side of said calibration resistor to the other side of said one bridge leg, whereby, closing of said switch connects said calibration and shunt resistors in series across said one bridge leg. - View Dependent Claims (2, 3, 4)
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5. In a physiological pressure transducing system having a monitor, a transducer assembly including a bridge-type transducer having four legs and means including a monitor cable for connecting said transducer assembly to said monitor, a calibration system comprising:
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a calibration resistor mounted on said transducer assembly, a shunt resistor connected to said monitor cable, and means on said monitor cable including a switch for connecting said calibration resistor and said shunt resistor in series across a leg of said bridge to produce an output on said monitor equivalent to 100 mmHg of pressure, said monitor cable being separable from said transducer assembly. - View Dependent Claims (6)
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Specification