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System and method for measuring oxygenation parameters

A parametric, oxygen delivery technology used in blood flow measurement, diagnostic recording/measurement, medical science, etc.

Inactive Publication Date: 2000-02-23
联合药品公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the model cannot be used to provide real-time measurements of patient tissue oxygenation under changing clinical conditions

Method used

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  • System and method for measuring oxygenation parameters
  • System and method for measuring oxygenation parameters
  • System and method for measuring oxygenation parameters

Examples

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example 1

[0121] Calculation of PvO for evaluating the invention 2 accuracy, a moderate-scale study was conducted in Europe where the PvO derived from the disclosed system 2 The level of PvO with direct measurement 2 values ​​were compared. In this study, 17 surgical subjects were recruited and placed with an arterial line and PA catheter, and a series of measurements were obtained for the calculation of PvO using the present invention. 2 Provide input. Measurements were taken as frequently as possible during surgery at 30-minute intervals during a 6-hour period in the recovery room during inspired oxygen (FiO 2 ) levels range from 0.4 to 0.8 (for a wide range of PvO 2 value) measured in the case of. As mentioned, in the present invention to determine the PvO 2 The variables included cardiac output, arterial hemoglobin, blood gases, VO 2 , and body temperature. In this study, continuous cardiac output was determined in-line within the system (i.e., using the Modelflo device) as ...

example 2

[0125] Figures 8 and 9 illustrate typical systems and video display screens compatible with the techniques herein. In the embodiment shown a blood chemistry monitor and arterial pressure sensor are included in the system. In any case, it should be understood that the integrated system described is, but only, one embodiment, and components compatible with the present invention may be assembled in many different forms.

[0126] In particular, Figure 8 shows a patient monitoring system 800 comprising tissue oxygenation monitor 801, blood chemistry monitor 805 and an arterial pressure sensor (not shown) operably interconnected. System 800 is operably interconnected with patient 802 via blood chemistry monitor connector 806 . Blood chemistry monitor connector 806 communicates information between blood chemistry monitor 805 and blood chemistry sampler 804, which is in fluid conductive communication with the patient's circulatory system. Sampler 804 draws a small sample of blood fr...

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Abstract

Systems and methods are described for calculating, in real-time, various oxygenation parameters including total oxygen transport (DO 2), mixed venous blood oxygen tension (RO 2) and mixed venous blood oxyhemoglobin saturation (SvO 2) in a patient. The system preferably uses a computer (140), an arterial pressure line (160) and a blood chemistry monitor (150) to assist a physician in accurately determining when to give a patient a blood transfusion or otherwise alter the clinical management of the patient.

Description

field of invention [0001] The present invention relates to systems and methods for non-invasively determining physiological parameters related to a patient's oxygenation status. More specifically, the present invention relates to systems and methods for determining in real time parameters related to overall tissue oxygenation in a patient undergoing treatment. Background of the invention [0002] A problem that has long puzzled physicians is how to accurately measure the oxygenation status of a patient's tissue without resorting to an invasive method. This is important in many medical procedures because doctors need to know when to administer medicine or transfuse more blood to a patient. When a patient's tissues are low in oxygenation, doctors will infuse the patient with more blood or other oxygen carriers to increase the rate of oxygen delivery and maintain proper cellular respiration. [0003] During surgery and postoperative adjustments, the need for blood transfusion...

Claims

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Application Information

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IPC IPC(8): A61B5/0205A61B5/00A61B5/0215A61B5/029A61B5/145A61B5/1473
CPCA61B5/412A61B5/0215A61B5/1455A61B5/029A61B5/145A61B5/14551A61B5/14539A61B5/742
Inventor N·S·费斯福尔G·洛尔德斯
Owner 联合药品公司
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