Combination Sensor Guidewire and Methods of Use
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Abstract
The present invention provides for an improved combination sensor tip that includes an ultrasound transducer and a pressure sensor both disposed at or in close proximity to the distal end of the combination sensor tip. The present invention also provides for an improved connector to couple a guide wire to a physiology monitor that reduces torsional resistance when maneuvering the guide wire.
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Citations
50 Claims
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1-30. -30. (canceled)
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31. A system for measuring blood pressure and a blood flow characteristic other than blood pressure at a region of interest in a vessel without restricting flow in the vessel, comprising:
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a flexible elongate member having a proximal portion, a distal portion, and an outer diameter less than or equal to 0.018 inches, a pressure sensor secured to the distal portion of the elongate member, and a sensor for measuring a blood flow characteristic other than blood pressure secured to the distal portion of the elongate member, wherein the separation between the pressure sensor and the sensor for measuring a blood flow characteristic other than blood pressure is less than 3 cm; a control console in communication with the pressure sensor and the sensor for measuring a blood flow characteristic other than blood pressure, the control console configured to; obtain from the pressure sensor a first blood pressure measurement at the region of interest within the vessel in a first flow state; obtain from the pressure sensor a second blood pressure measurement at the region of interest within the vessel in a second flow state; obtain from the sensor for measuring a blood flow characteristic other than blood pressure a first blood flow characteristic measurement other than blood pressure in the first flow state; obtain from the sensor for measuring a blood flow characteristic other than blood pressure a second blood flow characteristic measurement other than blood pressure in the second flow state; and
measuring a second blood flow characteristic other than blood pressure in a second flow state; anddetermine a severity of a stenosis in the region of interest by performing at least one of the following steps; comparing the first blood pressure measurement and the second blood pressure measurement; and comparing the first blood flow characteristic measurement other than blood pressure and the second blood flow characteristic measurement other than blood pressure. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A system for measuring blood pressure and a blood flow characteristic other than blood pressure at a region of interest in a vessel without restricting flow in the vessel, comprising:
a control console configured to communicate with a flexible elongate member having a pressure sensor and a sensor for measuring a blood flow characteristic other than blood pressure such that the control console; obtains from the pressure sensor a first blood pressure measurement at the region of interest within the vessel in a first flow state; obtains from the pressure sensor a second blood pressure measurement at the region of interest within the vessel in a second flow state; obtains from the sensor for measuring a blood flow characteristic other than blood pressure a first blood flow characteristic measurement other than blood pressure in the first flow state; obtains from the sensor for measuring a blood flow characteristic other than blood pressure a second blood flow characteristic measurement other than blood pressure in the second flow state; and
measuring a second blood flow characteristic other than blood pressure in a second flow state; anddetermines a severity of a stenosis in the region of interest by performing at least one of the following steps; comparing the first blood pressure measurement and the second blood pressure measurement; and comparing the first blood flow characteristic measurement other than blood pressure and the second blood flow characteristic measurement other than blood pressure. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50)
Specification