Differential pressure sensor for respiratory monitoring
First Claim
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1. A differential pressure sensor for measuring respiratory gas flow, said differential pressure sensor comprising:
- a tubular housing having a bore and a longitudinal axis;
a strut diametrically disposed and longitudinally extending within said tubular housing bore,said strut having a first end face, a second end face, a first side face, a second side face, and an axial length along the longitudinal axis of said tubular housing;
first and second longitudinally spaced notch means in said strut located proximate said longitudinal axis of said tubular housing for allowing said respiratory gas flow thereinto, said first notch means extending from said first end face axially inward into said strut and from said first side face to said second side face, said second notch means extending from said second end face axially inward into said strut and from said first side face to said second side face; and
first and second pressure ports respectively opening into said first and second notch means from first and second lumens contained within said strut and extending to the exterior of said tubular housing.
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Abstract
A differential pressure sensor for measuring respiratory gas flow including a tubular housing containing a diametrically-oriented, longitudinally extending strut containing first and second lumens having longitudinally-spaced pressure ports opening into respective axially-located notches at each end of the strut.
135 Citations
40 Claims
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1. A differential pressure sensor for measuring respiratory gas flow, said differential pressure sensor comprising:
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a tubular housing having a bore and a longitudinal axis;
a strut diametrically disposed and longitudinally extending within said tubular housing bore,said strut having a first end face, a second end face, a first side face, a second side face, and an axial length along the longitudinal axis of said tubular housing; first and second longitudinally spaced notch means in said strut located proximate said longitudinal axis of said tubular housing for allowing said respiratory gas flow thereinto, said first notch means extending from said first end face axially inward into said strut and from said first side face to said second side face, said second notch means extending from said second end face axially inward into said strut and from said first side face to said second side face; and first and second pressure ports respectively opening into said first and second notch means from first and second lumens contained within said strut and extending to the exterior of said tubular housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A differential pressure sensor for measuring respiratory gas flow, said differential pressure sensor comprising:
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a tubular housing having a bore and a longitudinal axis, said bore having a first portion and a second portion, the diameter of said first portion being greater than the diameter of said second portion; a strut diametrically disposed and longitudinally extending within said tubular housing bore, said strut having a first end face proximate said first portion of said bore of said tubular housing and having a second end face proximate said second portion of said bore of said tubular housing; first and second longitudinally spaced notch means in said strut located proximate said longitudinal axis of said tubular housing for allowing said respiratory gas flow thereinto; and first and second pressure ports respectively opening into said first and second notch means from first and second lumens contained within said strut and extending to the exterior of said tubular housing. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A differential pressure sensor for measuring respiratory gas flow, said differential pressure sensor comprising:
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tubular housing means for said flow of said respiratory gas therethrough, said tubular housing means having a bore having, in turn, a diameter and a longitudinal axis; strut means for providing resistance to said flow of said respiratory gas, said strut being diametrically disposed and longitudinally extending within said tubular housing bore; first and second longitudinally spaced notch means in said strut for allowing said respiratory gas flow thereinto, said first and second longitudinally spaced notch means each having a first wall portion for providing an area for measuring the pressure of said respiratory gas flow and a second back wall portion for said respiratory gas flow therearound from said notch means through said tubular housing; and first and second pressure port means for allowing said flow of respiratory gas thereinto, said first and second pressure port means respectively opening into said first wall portion of each of said first and second notch means from first and second lumens contained within said strut means and extending to the exterior of said tubular housing wherein each of said first and second pressure port means being located in said first wall portion a distance away from said second back wall portion of said notch means. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification