Blood pressure transducer
First Claim
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1. A method of measuring the pressure of a fluid, comprising the steps of:
- transmitting light through an elastomeric optical fiber comprising an elastomeric core and an elastomeric cladding,deforming part of the side surface of the elastomeric optical fiber by imposing a pressurized fluid on the surface and thereby changing a transmission factor of the optical fiber,detecting the intensity of the light transmitted through the optical fiber using an optical sensor, andproducing a pressure measurement from the detected intensity wherein the optical fiber is a component of a blood pressure transducer system comprising;
a catheter having a first end and a second end,a pressure tube in fluid communication to one of the ends of the catheter, anda pressure transducer connected to an end of the pressure tube, wherein the pressure transducer comprises an optical fiber made of a transparent elastomer and having a deformable side surface, a first end and a second end, wherein the pressure transducer comprises a light source and an optical sensor, wherein the pressure tube is connected to the optical fiber at an intermediate part of the optical fiber, and wherein the optical sensor is capable of detecting the change of the intensity of the light of the light source resulting from the change of a transmission factor of the optical fiber in response to the change of pressure exerted through the pressure tube on the deformable side surface of the optical fiber.
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Abstract
This invention relates to a blood pressure transducer (8) and provides a safe and economical transducer by providing a novel optical fiber (80) made of a transparent elastomer. The present invention provides an invasive direct blood pressure transducer (8) of an external sensor system consisting of a catheter (1a), a pressure tub (6) connected to the catheter at one of the ends thereof and a pressure transducer (8) connected to the other end of the pressure tube (6), part of the pressure transducer is composed of an optical fiber (80) made of a transparent elastomer.
81 Citations
17 Claims
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1. A method of measuring the pressure of a fluid, comprising the steps of:
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transmitting light through an elastomeric optical fiber comprising an elastomeric core and an elastomeric cladding, deforming part of the side surface of the elastomeric optical fiber by imposing a pressurized fluid on the surface and thereby changing a transmission factor of the optical fiber, detecting the intensity of the light transmitted through the optical fiber using an optical sensor, and producing a pressure measurement from the detected intensity wherein the optical fiber is a component of a blood pressure transducer system comprising; a catheter having a first end and a second end, a pressure tube in fluid communication to one of the ends of the catheter, and a pressure transducer connected to an end of the pressure tube, wherein the pressure transducer comprises an optical fiber made of a transparent elastomer and having a deformable side surface, a first end and a second end, wherein the pressure transducer comprises a light source and an optical sensor, wherein the pressure tube is connected to the optical fiber at an intermediate part of the optical fiber, and wherein the optical sensor is capable of detecting the change of the intensity of the light of the light source resulting from the change of a transmission factor of the optical fiber in response to the change of pressure exerted through the pressure tube on the deformable side surface of the optical fiber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of measuring the pressure of a fluid, comprising the steps of:
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transmitting light through an elastomeric optical fiber comprising an elastomeric core and an elastomeric cladding, the optical fiber having a deformable side surface, a first end and a second end, deforming part of the side surface of the elastomeric optical fiber by imposing a pressurized fluid from a pressure tube onto the deformable side surface of the optical fiber, wherein a change of an applied pressure on the deformable side surface of the optical fiber causes a change of a transmission factor of the optical fiber, detecting the intensity of the light transmitted through the optical fiber using an optical sensor, and producing a pressure measurement from the detected intensity. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of measuring the pressure of a fluid, comprising the steps of:
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transmitting light through an elastomeric optical fiber comprising an elastomeric core and an elastomeric cladding, the optical fiber having a deformable side surface, a first end and a second end, providing a fluid packed means for transferring pressure, deforming part of the side surface of the elastomeric optical fiber by imposing a pressurized fluid from the means for transferring pressure onto the deformable side surface of the optical fiber, and thereby changing a transmission factor of the optical fiber, detecting the intensity of the light transmitted through the optical fiber using an optical sensor, and producing a pressure measurement from the detected intensity.
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Specification