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, an axial length along the longitudinal axis of said tubular housing, and material affixed thereto to restrict said respiratory gas flow through 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 having a bore containing a diametrically-oriented, longitudinally extending strut containing first and second lumens having longitudinally spaced pressure ports at axially spaced locations of the strut, the ports being located on opposite sides of a bore restriction.
98 Citations
30 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, an axial length along the longitudinal axis of said tubular housing, and material affixed thereto to restrict said respiratory gas flow through 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)
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14. 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 in a portion of said tubular housing bore and longitudinally extending within said tubular housing bore, said strut having a first end face, a second end face, a longitudinal bore surface, an axial length along the longitudinal axis of said strut and material affixed to said longitudinal bore surface along a portion of said axial length of said strut to restrict said respiratory gas flow through said tubular housing; and first and second pressure ports respectively opening into said longitudinal bore surface of said strut from first and second lumens contained within said strut and extending to the exterior of said tubular housing, said first and second pressure ports located on first and second sides of said material affixed to said longitudinal bore surface of said tubular housing. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification