Noninvasive blood pressure monitoring system
First Claim
1. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising a first input configured to receive a measurement signal indicative of the NIBP of a subject;
- a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to provide said output signal in a form suitable for input to an IBP monitor;
wherein said first input is connected to an NIBP sensor and said second input and said output are both connected to an IBP monitor.
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Accused Products
Abstract
The preferred embodiment of the present invention comprises a single microprocessor-based interface that connects between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor or module. The interface effectively emulates an IBP transducer in such a way that the IBP monitor sees the interface as if it were a regular IBP transducer from a fluid-filled blood pressure monitoring line. It receives the signal from an NIBP sensor and determines the blood pressure corresponding to the signal. It accepts the excitation voltage provided by the IBP monitor. From the excitation voltage and a known transducer sensitivity which the IBP monitor is configured to work with, the interface emulates the IBP transducer output signal corresponding to the blood pressure. The interface also emulates the input and output impedances of the IBP transducer which the IBP monitor is configured to work with. Zeroing of the interface with the IBP monitor can be easily performed in a way that is similar to that for a fluid-filled system. A noninvasive system comprising a suitable NIBP sensor and this interface can be used as an alternative to the fluid-filled monitoring line.
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Citations
70 Claims
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1. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to provide said output signal in a form suitable for input to an IBP monitor;
wherein said first input is connected to an NIBP sensor and said second input and said output are both connected to an IBP monitor. - View Dependent Claims (2, 3, 4, 5)
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6. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to provide said output signal in a form suitable for input to an IBP monitor;
wherein said processor(s) is configured such that a user can select from a predetermined range of processing options. - View Dependent Claims (7, 8, 9, 10)
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11. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to provide said output signal in a form suitable for input to an IBP monitor;
wherein said processor(s) is configured such that a user can select the sensitivity of said output signal in relation to said measurement signal from a predetermined range of choices. - View Dependent Claims (12, 13)
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14. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
configured to determine the differential voltage of said excitation signal; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal and said differential voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to receive said midpoint voltage and configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage. - View Dependent Claims (15, 16, 17, 18)
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19. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
configured to determine the differential voltage of said excitation signal; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal, said differential voltage and said midpoint voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
where the differential voltage of said output signal depends on said excitation signal, a predetermined or selectable transducer sensitivity, and said measurement signal; and
an output configured to provide said output signal in a form suitable for input said IBP monitors, including a digital-to-analog converter (DAC) to receive output signal from said processor(s), and said DAC is configured according to predetermined instructions such that its full-scale output voltage range includes the voltage corresponding to a predetermined maximum pressure range of the NIBP of a subject. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to determine the output differential voltage for said output signal; and
having at least two terminals configured to provide said output signal in a form suitable for input to an IBP monitor;
wherein said second input, said processor(s) and said output are configured such that the voltage level of each of said two terminals is substantially similar to that produced by an IBP transducer for the same pressure variations in a subject. - View Dependent Claims (36, 37, 38, 39)
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40. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to provide said output signal in a form suitable for input to an IBP monitor;
wherein said second input is configured to provide an input impedance that is within a predetermined range. - View Dependent Claims (41, 42, 43)
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44. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to provide said output signal in a form suitable for input to an IBP monitor;
wherein said output means is configured to provide an output impedance that is within a predetermined range. - View Dependent Claims (45, 46, 47)
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48. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions;
an output configured to provide said output signal in a form suitable for input to an IBP monitor; and
a calibration device configured to provide a calibration signal to said processor(s);
wherein said processor(s) is configured to calibrate said measurement signal according to predetermined instructions. - View Dependent Claims (49, 50, 51)
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52. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
at least one processor(s) configured to receive said measurement signal and said excitation signal and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to provide said output signal in a form suitable for input to an IBP monitor;
wherein said processor(s) is further configured to supply a zero signal to said output according to predetermined instructions. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59)
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60. A method of zeroing an interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising the steps of
preparing said IBP monitor to receive said zero signal through an output, according to operating instructions for said IBP monitor; -
sending said zero signal to said IBP monitor through said output;
zeroing on said IBP monitor, according to operating instructions for said IBP monitor; and
preparing said IBP monitor to receive said NIBP measurement signal through said output, according to operating instructions for said IBP monitor.
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61. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
configured to determine the differential voltage of said excitation signal; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal and said differential voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions;
an output configured to receive said midpoint voltage and configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage;
said processor(s) and output are configured to provide an output differential voltage in relation to said measurement signal in a form suitable for input to an IBP monitor; and
said output is configured to add said midpoint voltage to the midpoint of said output differential voltage.
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62. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
configured to determine the differential voltage of said excitation signal; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal and said differential voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions;
an output configured to receive said midpoint voltage and configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage;
said processor(s) and output are configured to provide an output differential voltage in relation to said measurement signal in a form suitable for input to an IBP monitor; and
said output is configured to add said midpoint voltage to the voltage at either terminal for said output differential voltage.
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63. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
configured to determine the differential voltage of said excitation signal; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal, said differential voltage and said midpoint voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions;
an output configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage;
said processor(s) and output are configured to provide an output differential voltage in relation to said measurement signal in a form suitable for input to an IBP monitor; and
said output is configured to add said midpoint voltage to the midpoint of said output differential voltage.
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64. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive a transducer excitation signal provided by an IBP monitor;
configured to determine the differential voltage of said excitation signal; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal, said differential voltage and said midpoint voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions;
an output configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage;
said processor(s) and output are configured to provide an output differential voltage in relation to said measurement signal in a form suitable for input to an IBP monitor; and
said output is configured to add said midpoint voltage to the voltage at either terminal for said output differential voltage.
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65. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive the differential voltage of an excitation signal provided by an IBP monitor; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal and said differential voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to receive said midpoint voltage and configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage.
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66. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive the differential voltage of an excitation signal provided by an IBP monitor; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal and said differential voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions;
an output configured to receive said midpoint voltage and configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage;
said processor(s) and output are configured to provide an output differential voltage in relation to said measurement signal in a form suitable for input to an IBP monitor; and
said output is configured to add said midpoint voltage to the midpoint of said output differential voltage.
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67. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive the differential voltage of an excitation signal provided by an IBP monitor; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal and said differential voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions;
an output configured to receive said midpoint voltage and configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage;
said processor(s) and output are configured to provide an output differential voltage in relation to said measurement signal in a form suitable for input to an IBP monitor; and
said output is configured to add said midpoint voltage to the voltage at either terminal for said output differential voltage.
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68. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive the differential voltage of the excitation signal provided by an IBP monitor; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal, said differential voltage and said midpoint voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions; and
an output configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage.
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69. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive the differential voltage of the excitation signal provided by an IBP monitor; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal, and said differential voltage and said midpoint voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions;
an output configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage;
said processor(s) and output are configured to provide an output differential voltage in relation to said measurement signal in a form suitable for input to an IBP monitor; and
said output is configured to add said midpoint voltage to the midpoint of said output differential voltage.
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70. An interface configured to connect between a noninvasive blood pressure (NIBP) sensor and an invasive blood pressure (IBP) monitor comprising
a first input configured to receive a measurement signal indicative of the NIBP of a subject; -
a second input configured to receive the differential voltage of the excitation signal provided by an IBP monitor; and
configured to determine the midpoint voltage of said excitation signal;
at least one processor(s) configured to receive said measurement signal, said differential voltage and said midpoint voltage and emulate an output signal indicative of the IBP of a subject according to predetermined instructions;
an output configured to provide said output signal in a form suitable for input to an IBP monitor; and
such that the midpoint of said output signal is substantially similar to that of said midpoint voltage;
said processor(s) and output are configured to provide an output differential voltage in relation to said measurement signal in a form suitable for input to an IBP monitor; and
said output is configured to add said midpoint voltage to the voltage at either terminal for said output differential voltage.
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Specification