Disposable blood pressure transducer and monitor interface
First Claim
1. A medical fluid pressure sensing system, comprising:
- a pressure transducing device, comprising;
a. a pressure-sensitive transducer capable of externally measuring fluid pressures and converting those pressures into electrical signals;
b. an identifier which characterizes the pressure transducing device; and
a signal receiving device adapted to communicate with the pressure transducing device and receive the electrical signals and being capable of sensing the identifier and therefore the characteristics of the pressure transducing device when placed in communication therewith;
wherein the identifier comprises electrical circuitry;
wherein the electrical circuitry comprises a resistance/capacitance (RC) combination that possesses a characteristic time constant;
wherein the signal receiving device includes decision-making circuitry that will only permit functioning of the system depending on a determination of the time constant; and
wherein the decision-making circuitry will only permit functioning of the system if the time constant is within 20% of a reference value.
1 Assignment
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Accused Products
Abstract
A medical blood pressure transducer that provides an identifier to a monitor that conveys characteristics of the transducer. The monitor can use the information to decide whether to function, or in calibration of the system. The transducer may be part of a disposable blood pressure monitoring system, and may include two transducers closely-spaced to provide two separate but identical outputs. In this way, the transducer may be connected to both a patient monitor and a cardiac output monitor at the same time measurements from a single line can be simultaneously supplied to two separate monitoring devices (for example a patient monitor and a cardiac output monitor). The identifier for the transducer may be circuitry, specifically a resistance/capacitance (RC) combination that possesses a characteristic time constant.
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Citations
10 Claims
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1. A medical fluid pressure sensing system, comprising:
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a pressure transducing device, comprising; a. a pressure-sensitive transducer capable of externally measuring fluid pressures and converting those pressures into electrical signals; b. an identifier which characterizes the pressure transducing device; and a signal receiving device adapted to communicate with the pressure transducing device and receive the electrical signals and being capable of sensing the identifier and therefore the characteristics of the pressure transducing device when placed in communication therewith; wherein the identifier comprises electrical circuitry; wherein the electrical circuitry comprises a resistance/capacitance (RC) combination that possesses a characteristic time constant; wherein the signal receiving device includes decision-making circuitry that will only permit functioning of the system depending on a determination of the time constant; and wherein the decision-making circuitry will only permit functioning of the system if the time constant is within 20% of a reference value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification