Universal connector means for transducer/monitor systems
First Claim
1. A system for use in environment having electromagnetic interference to monitor blood pressure in living tissue, comprising:
- a transducer for converting a blood pressure into an electrical signal, said transducer exhibiting an electrical output impedance;
electrical signal monitoring means having an input electrical impedance different form said electrical output impedance; and
electrical amplifying means having an input connected to the transducer and an output connected to the monitoring means, said input of said amplifying means having an impedance acceptability range including the electrical output impedance of the transducer and said output of said amplifying means having an output impedance compatible with the input impedance of the monitoring means.
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Accused Products
Abstract
A system for monitoring physiological conditions in humans and other animals includes a transducer for monitoring such conditions as blood pressure, a monitor for displaying or recording signals from such transducers, or both, and a connector for linking the transducer to the monitor and for transforming the impedance level of signals from such transducer to levels appropriate for such monitors and for drawing and adapting power from the monitor for effecting this impedance transformation. The connector may also include a mechanism for adjusting the offset or sensitivity of the signal from the transducer, a mechanism for detecting the absence of the transducer, and a mechanism for detecting an open circuit between the monitor and the transducer. A connector may also include a device for converting power drawn from a monitor to direct current where the power drawn from the monitor is, before conversion, either sine wave or pulsed; a mechanism for regulating the current from the monitor; and a mechanism for eliminating common-mode voltage errors from the transducer signal.
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Citations
6 Claims
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1. A system for use in environment having electromagnetic interference to monitor blood pressure in living tissue, comprising:
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a transducer for converting a blood pressure into an electrical signal, said transducer exhibiting an electrical output impedance; electrical signal monitoring means having an input electrical impedance different form said electrical output impedance; and electrical amplifying means having an input connected to the transducer and an output connected to the monitoring means, said input of said amplifying means having an impedance acceptability range including the electrical output impedance of the transducer and said output of said amplifying means having an output impedance compatible with the input impedance of the monitoring means.
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2. A system for use in an environment having electromagnetic interference to monitor blood pressure in living tissue, comprising:
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blood pressure transducing means having an electrical output signal and a transducer output impedance; monitoring means having a monitor input impedance for monitoring signals from said blood pressure transducing means; means for interconnecting said blood pressure transducing means and said monitoring means, said interconnecting means including means for matching the output impedance of said transducer means to a value compatible with the input impedance of said monitoring means; and means for drawing power from said monitoring means for effecting said impedance matching. - View Dependent Claims (3, 4, 5, 6)
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Specification