Blood monitoring system
First Claim
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1. A method to determine blood gas concentrations and partial pressures in a patient, comprising the steps of:
- exhausting at least one fluid from a fluid transfer device;
containing a fixed volume of the at least one fluid;
exposing the fixed volume of the at least one fluid to an excitation source; and
detecting a pressure change in the fixed volume of the at least one fluid.
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Abstract
A method and apparatus for measuring blood gas concentrations and partial pressures, in real time, using a pneumatic detector to indicate partial pressure variations in the blood gas.
9 Citations
20 Claims
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1. A method to determine blood gas concentrations and partial pressures in a patient, comprising the steps of:
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exhausting at least one fluid from a fluid transfer device;
containing a fixed volume of the at least one fluid;
exposing the fixed volume of the at least one fluid to an excitation source; and
detecting a pressure change in the fixed volume of the at least one fluid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method to determine a state of perfusion of a patient, comprising the steps of:
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exhausting at least one fluid from a fluid transfer device;
containing a fixed volume of the at least one fluid;
exposing the fixed volume of the at least one fluid to an excitation source;
determining a first partial pressure or concentration of the at least one gas present in the fluid in real time;
determining a second partial pressure or concentration of the at least one gas present in the fluid via a device selected from the group comprising a blood blood gas analyzer, an ATR device, and an ATR device configured with a pneumatic sensor; and
comparing a difference between first partial pressure or concentration and the second partial pressure or concentration to determine a gap. - View Dependent Claims (11, 12)
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13. An apparatus to determine a partial pressure of a gas, the apparatus comprising:
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a gas measurement device body defining a cavity, wherein the cavity has a finite volume;
a microphone fluidly connected to the cavity; and
an excitation source in optically connected to the cavity. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification