US4928694A
Expired / Lapsed
US
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Intravascular blood parameter measurement system
Assignee: Terumo Cardiovascular Systems Corp
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Filing: 1989-03-23
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Granted: 1990-05-29
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Expires: 2009-03-23
Abstract
Abstract A parameter of blood is sensed in vivo with a system which includes a catheter and a probe. The catheter has a lumen extending therethrough, a proximal end, a distal end and a distal opening at the distal end. The probe includes one or more sensors at its distal end. A saline solution is introduced into the lumen so that there is an interface adjacent the distal opening of the catheter between the blood and saline solution. The probe is received within the catheter and affixed thereto. The interface is moved back and forth in the lumen to expose the sensors to blood so that they can sense the blood parameters of interest.
Inventors
- 👤 Thomas P. Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/68; A61B5/6846; A61B5/6847; A61B5/6852; A61B5/02; A61B5/021; A61B5/0215; A61B5/02158; A61B5/145; A61B5/1455; A61B5/1459
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
116 words
A probe for sensing at least one parameter in blood comprising: first and second optical sensors for sensing at least one parameter in blood selected from the group consisting of blood gases, pH, electrolytes, glucose, and temperature and for providing a signal in response thereto; and elongated transmission means for transmitting the signals from the first and second sensors proximally; said first and second sensors being carried by a distal portion of the transmission means with the first and second sensors being at different longitudinal positions along the distal portion of the transmission means; and said transmission means and said first and second sensors being sized to be received in the cardiovascular system of a patient.
Claim 2
Dependent Claim
116 words
A probe for sensing at least one parameter in blood comprising: first and second optical sensors for sensing at least one parameter in blood selected from the group consisting of blood gases, pH, electrolytes, glucose, and temperature and for providing a signal in response thereto; and elongated transmission means for transmitting the signals from the first and second sensors proximally; said first and second sensors being carried by a distal portion of the transmission means with the first and second sensors being at different longitudinal positions along the distal portion of the transmission means; and said transmission means and said first and second sensors being sized to be received in the cardiovascular system of a patient.
Claim 3
Dependent Claim
16 words
A probe as defined in claim 1 wherein said transmission means includes means for transmitting light.
Claim 4
Dependent Claim
24 words
A probe as defined in claim 1 wherein said transmission means includes means for transmitting light and said first sensor is a fluorescent sensor.
Claim 5
Dependent Claim
32 words
A probe as defined in claim 1 wherein said first and second sensors sense first and second different parameters in blood, respectively, and said first and second parameters are different blood gases.
Claim 6
Dependent Claim
35 words
A probe as defined in claim 1 wherein said first and second sensors sense first and second different parameters in blood, respectively, and said first and second parameters are a blood gas and pH, respectively.
Claim 7
Dependent Claim
62 words
A probe as defined in claim 1 wherein said transmission means includes first and second elongated optical fibers, each of said first and second optical fibers has a distal end, said first and second sensors are carried by the first and second optical fibers, respectively, adjacent the distal ends thereof, and said first optical fiber extends distally beyond the second optical fiber.
Claim 8
Dependent Claim
32 words
A probe as defined in claim 6 wherein said first and second sensors sense first and second different parameters in blood, respectively, and said first and second parameters are different blood gases.
Claim 9
Dependent Claim
35 words
A probe as defined in claim 6 wherein said first and second sensors sense first and second different parameters in blood, respectively, and said first and second parameters are a blood gas and pH, respectively.
Claim 10
Dependent Claim
59 words
A probe as defined in claim 6 including a third optical sensor for sensing a parameter in blood, said transmission means includes a third elongated optical fiber having a distal end, said third optical sensor being carried by the third optical fiber adjacent the distal end thereof, and said second optical fiber extends distally beyond the third optical fiber.
Claim 11
Dependent Claim
29 words
A probe as defined in claim 1 wherein said first and second sensors sense oxygen and carbon dioxide and the first sensor is located proximally of the second sensor.
Claim 12
Dependent Claim
146 words
A probe for sensing at least one parameter in blood comprising: first and second sensors for sensing at least one parameter in blood selected from the group consisting of blood gases, ph, electrolytes, glucose, and temperature and for providing a signal in response thereto; and first and second elongated optical fibers, each of said first and second optical fibers having a distal end portion which terminates in a distal end, said first and second sensors being optical sensors and being carried by the first and second optical fibers, respectively, adjacent the distal ends thereof; said first optical fiber extending distally along the distal end portion of the second optical fiber and distally beyond the distal end of the second optical fiber; and said first and second optical fibers and said first and second sensors being sized to be received in the cardiovascular system of a patient.
Claim 13
Dependent Claim
146 words
A probe for sensing at least one parameter in blood comprising: first and second sensors for sensing at least one parameter in blood selected from the group consisting of blood gases, ph, electrolytes, glucose, and temperature and for providing a signal in response thereto; and first and second elongated optical fibers, each of said first and second optical fibers having a distal end portion which terminates in a distal end, said first and second sensors being optical sensors and being carried by the first and second optical fibers, respectively, adjacent the distal ends thereof; said first optical fiber extending distally along the distal end portion of the second optical fiber and distally beyond the distal end of the second optical fiber; and said first and second optical fibers and said first and second sensors being sized to be received in the cardiovascular system of a patient.
Claim 14
Dependent Claim
15 words
A probe as defined in claim 11 wherein said first sensor is a fluorescent sensor.
Claim 15
Dependent Claim
32 words
A probe as defined in claim 11 wherein said first and second sensors sense first and second different parameters in blood, respectively, and said first and second parameters are different blood gases.
Claim 16
Dependent Claim
34 words
A probe as defined in claim 11 wherein said first and second sensors first and second different parameters in blood, respectively, and said first and second parameters are a blood gas and pH, respectively.
Claim 17
Dependent Claim
79 words
A probe as defined in claim 11 including a third optical sensor for sensing a parameter in blood and a third elongated optical fiber having a distal end portion which terminates in a distal end, said third optical sensor being carried by the third optical fiber adjacent the distal end thereof, and said second optical fiber extends distally along the distal end portion of the third optical fiber and distally beyond the distal end of the third optical fiber.
Claim 18
Dependent Claim
141 words
An assembly for sensing at least one parameter in blood comprising: a catheter having a lumen extending therethrough and being sized to be received in the cardiovascular system of a patient; and a probe including first and second optical sensors for sensing at least one parameter in blood selected from the group consisting of blood gases, pH, electrolytes, glucose, and temperature and for providing a signal in response thereto and elongated transmission means for transmitting the signals from the first and second optical sensors proximally, said first and second optical sensors being carried by a distal portion of the transmission means with the first and second optical sensors being at different longitudinal positions along the distal portion of the transmission means, and said elongated transmission means extending into said lumen and said first and second optical sensors being within said lumen.
Claim 19
Dependent Claim
141 words
An assembly for sensing at least one parameter in blood comprising: a catheter having a lumen extending therethrough and being sized to be received in the cardiovascular system of a patient; and a probe including first and second optical sensors for sensing at least one parameter in blood selected from the group consisting of blood gases, pH, electrolytes, glucose, and temperature and for providing a signal in response thereto and elongated transmission means for transmitting the signals from the first and second optical sensors proximally, said first and second optical sensors being carried by a distal portion of the transmission means with the first and second optical sensors being at different longitudinal positions along the distal portion of the transmission means, and said elongated transmission means extending into said lumen and said first and second optical sensors being within said lumen.
Claim 20
Dependent Claim
22 words
An assembly as defined in claim 16 wherein the lumen has a distal opening and the sensors are adjacent the distal opening.
Claim 21
Dependent Claim
38 words
An assembly as defined in claim 17 wherein the lumen is of reducing cross section toward the distal opening in a tapered zone adjacent the distal opening and the first and second sensors are in the tapered zone.
Claim 22
Dependent Claim
116 words
A probe for sensing parameters in blood comprising: first and second sensors for sensing first and second different parameters in blood, respectively, said parameters being selected from the group consisting of blood gases, pH, electrolytes, and temperature and for providing a signal in response thereto; and elongated transmission means for transmitting the signals from the first and second sensors proximally; said first and second sensors being carried by a distal portion of the transmission means with the first and second sensors being at different longitudinal positions along the distal portion of the transmission means; and said transmission means and said first and second sensors being sized to be received in the cardiovascular system of a patient.
Claim 23
Dependent Claim
116 words
A probe for sensing parameters in blood comprising: first and second sensors for sensing first and second different parameters in blood, respectively, said parameters being selected from the group consisting of blood gases, pH, electrolytes, and temperature and for providing a signal in response thereto; and elongated transmission means for transmitting the signals from the first and second sensors proximally; said first and second sensors being carried by a distal portion of the transmission means with the first and second sensors being at different longitudinal positions along the distal portion of the transmission means; and said transmission means and said first and second sensors being sized to be received in the cardiovascular system of a patient.
Claim 24
Dependent Claim
17 words
A probe as defined in claim 19 wherein said first and second parameters are different blood gases.
Claim 25
Dependent Claim
20 words
A probe as defined in claim 19 wherein said first and second parameters are a blood gas and pH, respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |