EP0354736A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Intravascular blood gas sensing system
Assignee: Terumo Cardiovascular Systems Corp
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Filing: 1989-08-04
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Granted: —
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Expires: 2009-08-04
Abstract
Abstract An assembly useful in conjunction with a signal transmission means for the measurement of a compositional parameter of the blood of a patient is disclosed. This assembly comprises a housing adapted and sized to be located outside the body of a patient and having a fluid flow passage therethrough into which blood from the patient is passed from a hollow tube, the fluid flow passage being defined by a wall which is substantially impermeable to blood, the housing being adapted to be removably secured to a signal transmission system such that the housing is capable of being removed from the signal transmission system without disrupting the fluid flow passage; and a sensing element located in the housing in or near the fluid flow passage for provding a signal directly to the signal transmission system in response to a compositional parameter of blood located in the fluid flow passage.
Inventors
- 👤 John L. C/O Cdi 3M Health Care Gehrich
- 👤 Thomas P. C/O Cdi 3M Health Care Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:04
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/1455; A61B5/1459; Y; Y10; Y10S; Y10S128/00; Y10S128/13
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
147 words
An assembly useful for the measurement of a compositional parameter of the blood of a patient comprising: a housing adapted and sized to be located outside the body of a patient and having a fluid flow passage therethrough into which blood from said patient is passed from a hollow tube in fluid communication with a blood vessel of said patient, said fluid flow passage being defined by a wall which is substantially impermeable to blood, said housing being adapted to be removably secured to a signal transmission means such that said housing is capable of being removed from said signal transmission means without disrupting said fluid flow passage; and a sensing element located in said housing in or near said fluid flow passage for providing a signal directly to said signal transmission means in response to a compositional parameter of blood located in said fluid flow passage.
Claim 2
Dependent Claim
147 words
An assembly useful for the measurement of a compositional parameter of the blood of a patient comprising: a housing adapted and sized to be located outside the body of a patient and having a fluid flow passage therethrough into which blood from said patient is passed from a hollow tube in fluid communication with a blood vessel of said patient, said fluid flow passage being defined by a wall which is substantially impermeable to blood, said housing being adapted to be removably secured to a signal transmission means such that said housing is capable of being removed from said signal transmission means without disrupting said fluid flow passage; and a sensing element located in said housing in or near said fluid flow passage for providing a signal directly to said signal transmission means in response to a compositional parameter of blood located in said fluid flow passage.
Claim 3
Dependent Claim
153 words
An assembly useful for the measurement of a compositional parameter of the blood of a patient comprising: a housing adapted and sized to be located outside the body of a patient and having a fluid flow passage therethrough into which blood to be measured is passed; and a sensing element located in said housing in or near said fluid flow passage for providing a signal to a signal transmission means in response to a compositional parameter of blood located in said fluid flow passage, said fluid flow passage at or near the location of said sensing element being at least two times as wide as it is deep, the deep direction of said fluid flow passage extending directly outwardly from said sensing element and the wide direction of said fluid flow passage being substantially perpendicular to both the general direction of fluid flow in said fluid flow passage and to said deep direction.
Claim 4
Dependent Claim
153 words
An assembly useful for the measurement of a compositional parameter of the blood of a patient comprising: a housing adapted and sized to be located outside the body of a patient and having a fluid flow passage therethrough into which blood to be measured is passed; and a sensing element located in said housing in or near said fluid flow passage for providing a signal to a signal transmission means in response to a compositional parameter of blood located in said fluid flow passage, said fluid flow passage at or near the location of said sensing element being at least two times as wide as it is deep, the deep direction of said fluid flow passage extending directly outwardly from said sensing element and the wide direction of said fluid flow passage being substantially perpendicular to both the general direction of fluid flow in said fluid flow passage and to said deep direction.
Claim 5
Dependent Claim
176 words
An assembly useful for the measurement of a compositional parameter of the blood of a patient comprising: a housing adapted and sized to be located outside the body of a patient and having a fluid flow passage therethrough into which blood from said patient is passed from a hollow tube, in fluid communication with a blood vessel of said patent, said housing including a first housing component defining a portion of said fluid flow passage, and including first and second tubing fittings acting to secure first and second segments of hollow tubing to said housing and first portions of first and second fluid flow channels each of which terminate in said fluid flow passage, said second housing component defining a portion of said fluid flow passage, and including second portions of said first and second fluid flow channels, and a sensing element located in said housing in or near said fluid flow passage for providing a signal to a signal transmission means in response to a compositional parameter of blood located in said fluid flow passage.
Claim 6
Dependent Claim
176 words
An assembly useful for the measurement of a compositional parameter of the blood of a patient comprising: a housing adapted and sized to be located outside the body of a patient and having a fluid flow passage therethrough into which blood from said patient is passed from a hollow tube, in fluid communication with a blood vessel of said patent, said housing including a first housing component defining a portion of said fluid flow passage, and including first and second tubing fittings acting to secure first and second segments of hollow tubing to said housing and first portions of first and second fluid flow channels each of which terminate in said fluid flow passage, said second housing component defining a portion of said fluid flow passage, and including second portions of said first and second fluid flow channels, and a sensing element located in said housing in or near said fluid flow passage for providing a signal to a signal transmission means in response to a compositional parameter of blood located in said fluid flow passage.
Claim 7
Dependent Claim
56 words
The assembly of any of claims 1, 2 or 3 which comprises more than one said sensing element, each of said sensing elements providing a signal to a signal transmission means in response to a different compositional parameter of blood located in said fluid flow passage, each of said sensing elements being a fluorescent sensing element.
Claim 8
Dependent Claim
59 words
The assembly of any of claims 1, 2, 3 or 4 which further comprises volume oscillator means in fluid communication with said fluid flow passage for urging blood from said patient to flow in said fluid flow passage, said volume oscillator means being structured and located so that substantially no net pumping of blood results from the operation thereof.
Claim 9
Dependent Claim
32 words
The assembly of any of claims 1, 2, 3, 4 or 5 which further comprises signal transmission means for transmitting said signal or signals from said sensing element or said sensing elements.
Claim 10
Dependent Claim
36 words
The assembly of claim 6 wherein said signal transmission means includes at least one optical fiber for each said sensing element and is adapted and sized to be removably secured to the body of said patent.
Claim 11
Dependent Claim
36 words
The assembly of claim 7 wherein said housing includes a recess which is sized and adapted to receive a portion of said signal transmission means when said housing is removably secured to said signal transmission means.
Claim 12
Dependent Claim
42 words
The assembly of any of claims 1, 2, 3, 4, 5, 6, 7 or 8 wherein said housing includes one or more indents open to said fluid flow passage, each said indent containing at least a portion of one said sensing element.
Claim 13
Dependent Claim
68 words
The assembly of any of claims 1, 2, 3, 4, 5, 6, 7, 8 or 9 which further comprises one or more support elements on each of which one said sensing element is located and which physically separates said sensing element from said housing, each of said support elements is at least partially located in a support indent in said housing and being substantially impermeable to blood gases.
References Cited (Backward Citations)
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