Powering a guide wire mounted sensor for intra-vascular measurements of physiological variables by means of inductive coupling
First Claim
1. A sensor assembly arranged to be disposed in a body for measuring a physiological variable, the sensor assembly comprising:
- a sensor element fixedly mounted at a distal portion of a guide wire for measuring the physiological variable and to provide a signal representing the measured physiological variable; and
a first coil positioned at the distal portion of the guide wire and arranged to receive energy by inductive coupling with a second coil that is coupled to an energy supply, wherein the second coil and energy supply are adapted to be located outside the body, in order to form a power supply for the sensor element, wherein the second coil is detachably arranged around a core wire at a proximal portion of the guide wire.
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Accused Products
Abstract
The present invention relates to a sensor assembly arranged to be disposed in a body for measuring a physiological variable. A basic idea of the present invention is to provide a sensor and guide wire assembly which communicates with an external unit by an inductive coupling between a first coil provided in the sensor assembly and a second, external coil which is disposed in or connected to the external unit. The external unit is preferably the same unit that is used to numerically or graphically display the physiological variables that are measured with the sensor and guide wire assembly. With the terminology introduced above, it should here be clear that both the signal transfer from the sensor as well as the energy feeding from the external unit to the sensor may be accomplished through the inductive coupling between the first and second coils.
64 Citations
8 Claims
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1. A sensor assembly arranged to be disposed in a body for measuring a physiological variable, the sensor assembly comprising:
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a sensor element fixedly mounted at a distal portion of a guide wire for measuring the physiological variable and to provide a signal representing the measured physiological variable; and a first coil positioned at the distal portion of the guide wire and arranged to receive energy by inductive coupling with a second coil that is coupled to an energy supply, wherein the second coil and energy supply are adapted to be located outside the body, in order to form a power supply for the sensor element, wherein the second coil is detachably arranged around a core wire at a proximal portion of the guide wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification