Intravascular blood parameter measurement system
First Claim
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1. 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.
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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.
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Citations
21 Claims
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1. A probe for sensing at least one parameter in blood comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A probe for sensing at least one parameter in blood comprising:
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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. - View Dependent Claims (12, 13, 14, 15)
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16. An assembly for sensing at least one parameter in blood comprising:
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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. - View Dependent Claims (17, 18)
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19. A probe for sensing parameters in blood comprising:
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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. - View Dependent Claims (20, 21)
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Specification