Catheter and probe-catheter assembly
First Claim
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1. An assembly for insertion into a blood vessel of a patient comprising:
- an elongated extruded catheter having first and second lumens and a distal port, said first lumen opening at a proximal end and opening at the distal port so as to allow the flow of fluid through said catheter and so as to provide fluid communication between said first lumen and the blood vessel of the patient, said second lumen having a closed end to prevent the flow of blood into said second lumen; and
a probe including an optical sensor responsive to a constituent of the blood for providing a signal which is related to the constituent of the blood and said transmission means comprising an optical fiber;
said probe, including said optical sensor and said optical fiber, being received in the second lumen such that said optical sensor is within the catheter but outside the first lumen and not in contact with the blood in the blood vessel of the patient; and
said catheter including means for allowing the constituent of the blood to pass from the blood to the optical sensor in the second lumen while substantially preventing at least some other components of the blood from passing from the blood to the optical sensor.
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Abstract
An assembly for insertion into the cardiovascular system of a patient comprising a catheter having first and second lumens and a distal port. The first lumen opens at the distal port. A probe is received in the second lumen. The probe includes a sensor responsive to a constituent of blood for providing a signal which is related to the constituent. The catheter has a window for allowing the constituent of blood to pass from outside the catheter to the sensor while substantially preventing other constituents of blood from passing from the outside of the catheter to the sensor.
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Citations
31 Claims
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1. An assembly for insertion into a blood vessel of a patient comprising:
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an elongated extruded catheter having first and second lumens and a distal port, said first lumen opening at a proximal end and opening at the distal port so as to allow the flow of fluid through said catheter and so as to provide fluid communication between said first lumen and the blood vessel of the patient, said second lumen having a closed end to prevent the flow of blood into said second lumen; and a probe including an optical sensor responsive to a constituent of the blood for providing a signal which is related to the constituent of the blood and said transmission means comprising an optical fiber; said probe, including said optical sensor and said optical fiber, being received in the second lumen such that said optical sensor is within the catheter but outside the first lumen and not in contact with the blood in the blood vessel of the patient; and said catheter including means for allowing the constituent of the blood to pass from the blood to the optical sensor in the second lumen while substantially preventing at least some other components of the blood from passing from the blood to the optical sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. An assembly for insertion into the cardiovascular system or a patient comprising:
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an elongated catheter having first and second lumens and a distal port, said first lumen opening at the distal port, said catheter having an exterior wall with an opening leading to the second lumen; and a probe including a sensor responsive to a constituent of blood for providing a signal which is related to the constituent of blood and transmission means for transmitting the signal from the sensor; said probe being received in the second lumen and said sensor being within the catheter outside the first lumen; and said catheter including a window in communication with the sensor and the exterior of the catheter, said window being selectively permeable to the constituent of blood and located to allow the constituent to pass from the exterior of the catheter into the opening and through the window to the sensor, said window including an inner layer of a porous polymer and an outer layer of a more dense polymer which is selectively permeable to the constituent of blood.
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29. An assembly for insertion into a region of a patient containing a body fluid comprising:
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an elongated catheter having first and second lumens and a distal port, said first lumen opening at the distal port; and a probe including a sensor responsive to a constituent of the body fluid for providing a signal which is related to the constituent of the body fluid and transmission means for transmitting the signal from the sensor; said probe being received in the second lumen and said sensor being within the catheter outside the first lumen; and said catheter including means for allowing the constituent of the body fluid to pass from outside the catheter to the sensor while substantially preventing at least some other components of the body fluid from passing from outside the catheter to the sensor, said allowing means comprising an inner layer of a porous polymer and an outer layer of a more dense polymer which is selectively permeable to the constituent of the body fluid. - View Dependent Claims (30, 31)
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Specification