Guidewire with fiber Bragg grating strain sensors

A guidewire including an optical fiber containing three fiber cores, each supporting a strain-sensing fiber Bragg grating (FBG) is described. The three FBGs are susceptible to changes in strain so that axial and lateral force vectors imparted to the FBGs can be ascertained. An optical connector deta...

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Bibliographic Details
Main Author Hayes, John Michael
Format Patent
LanguageEnglish
Published 21.02.2023
Subjects
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEASURING
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE
MEDICAL OR VETERINARY SCIENCE
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
SURGERY
TESTING
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Summary:A guidewire including an optical fiber containing three fiber cores, each supporting a strain-sensing fiber Bragg grating (FBG) is described. The three FBGs are susceptible to changes in strain so that axial and lateral force vectors imparted to the FBGs can be ascertained. An optical connector detachably connects the guidewire optic fiber to a proximal optical fiber. The proximal optical fiber in turn is connected to a controller, which in addition to ascertaining the axial and lateral force vectors imparted to each of the FBGs, is programmed to calculate the spatial orientation of the guidewire as it is advanced through the vasculature. This capability is extremely useful for positioning the guidewire at a body site of interest prior to performing a medical procedure. A temperature-sensing FBG is used to compensate for changes in the ambient temperature.
Bibliography:Application Number: US202117492846