Transbronchial reflectance oximetric measurement of mixed venous oxygen saturation, and device therefor
First Claim
1. A reflectance oximeter probe device for continuously measuring hemodynamic state of a patient based upon venous oxygen saturation in a cardiac vessel of the patient as determined transbronchially or transtracheally, said device comprising:
- a fiber-optic cable that provides near-infrared light and means for detecting the light, a spectrophotometer, and an inflatable cuff adapted to be positioned within the bronchus or trachea, wherein the fiber-optic cable and means for detecting the light are operably connected to the spectrophotometer and are arranged on the inflatable cuff to illuminate blood within the cardiac vessel and detect reflectance therefrom.
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Accused Products
Abstract
Provided are methods and a system for the transbronchial reflectance oximetric measurement of mixed venous oxygen saturation in the pulmonary artery of a patient, and a device therefor. Thus, provided is a quick, minimally invasive, method and system for determining an important endpoint of resuscitation, particularly for a patient in shock, because the probe used to measure the venous oxygen saturation is configured to permit insertion through an endotracheal tube until the probe is placed in contact with the bronchial luminus mucosa of the patient'"'"'s right bronchus, left bronchus or distal trachea, directly adjacent to the patient'"'"'s pulmonary artery.
59 Citations
24 Claims
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1. A reflectance oximeter probe device for continuously measuring hemodynamic state of a patient based upon venous oxygen saturation in a cardiac vessel of the patient as determined transbronchially or transtracheally, said device comprising:
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a fiber-optic cable that provides near-infrared light and means for detecting the light, a spectrophotometer, and an inflatable cuff adapted to be positioned within the bronchus or trachea, wherein the fiber-optic cable and means for detecting the light are operably connected to the spectrophotometer and are arranged on the inflatable cuff to illuminate blood within the cardiac vessel and detect reflectance therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for continuously measuring hemodynamic state of a patient in terms of venous oxygen saturation, the method comprising:
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placing a fiber-optic cable within the patient'"'"'s bronchus or trachea;
transmitting near-infrared light through the bronchial or tracheal wall to illuminate blood within an adjacent cardiac vessel of the patient;
detecting light reflected from the illuminated blood; and
measuring venous oxygen saturation in the adjacent cardiac vessel, as determined transbronchially or transtracheally. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification