MEDICAL DEVICE AND TECHNIQUE FOR USING SAME
First Claim
Patent Images
1. A method for determining placement of a tracheal tube in a subject comprising:
- emitting light from an optical conductor disposed in or on a tracheal tube disposed in a subject;
receiving returned light from an anatomical structure within the subject;
measuring an intensity of the returned light; and
determining a placement parameter based upon the intensity of the returned light.
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Accused Products
Abstract
According to various embodiments, a tracheal tube may employ optical sensing techniques for determining a distance between the inserted tube and an anatomical structure, such as a carina. The distance information may provide an indication as to whether or not the tracheal tube is properly placed within the trachea. The optical techniques may include backscattered intensity measurements.
57 Citations
20 Claims
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1. A method for determining placement of a tracheal tube in a subject comprising:
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emitting light from an optical conductor disposed in or on a tracheal tube disposed in a subject; receiving returned light from an anatomical structure within the subject; measuring an intensity of the returned light; and determining a placement parameter based upon the intensity of the returned light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for determining placement of a tracheal tube in a subject comprising:
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emitting light from an optical conductor disposed in or on a tracheal tube disposed in a subject; determining an intensity of the emitted light; receiving returned light from an anatomical structure within the subject; determining an intensity of the returned light; and determining a placement parameter based upon an algorithm that implements an equation generally of the form;
R=½
(Io/Ir)1/2,where R is the placement parameter, is a function of optical properties of the anatomical structure, Io is the intensity of the emitted light, and Ir is the intensity of the returned light. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A system for determining placement of a tracheal tube in a subject comprising:
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a light source configured to emit light through an optical conductor disposed in or on a tracheal tube disposed in a subject; a photodetector configured to receive returned light from an anatomical structure within the subject and to determine an intensity of the returned light; and a processor configured to determine a placement parameter based upon the intensity of the returned light. - View Dependent Claims (18, 19, 20)
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Specification