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Methods for the use of inherent frequency shifting mechanisms for sensors response reading with continuous wave excitation

A frequency comb, resonant frequency technology, applied in the field of monitoring the pressure in the body cavity, can solve the problem of environmental pressure that cannot provide enough information

Pending Publication Date: 2020-11-27
MICROTECH MEDICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some cases (for example, nonlinear systems), the information obtained by exciting the first harmonic of the system may not provide enough information to accurately calculate the ambient pressure

Method used

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  • Methods for the use of inherent frequency shifting mechanisms for sensors response reading with continuous wave excitation
  • Methods for the use of inherent frequency shifting mechanisms for sensors response reading with continuous wave excitation
  • Methods for the use of inherent frequency shifting mechanisms for sensors response reading with continuous wave excitation

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Embodiment Construction

[0015] The methods and apparatus of the present invention relate generally to measuring ambient pressure in systems including incompressible fluids. For purposes of this application, "incompressible fluid" generally refers to non-vaporizing, incompressible, flowable media such as liquids, slurries, and gels. The miniature size of the device, as well as the relatively low invasiveness of the device and method compared to conventional devices currently used to measure pressure in environmental fluids, are particularly suitable for medical and physiological applications, including but not limited to measuring: i) Vascular / arterial / venous pressure such as in portal hypertension; ii) cerebrospinal fluid pressure; iii) intra-abdominal pressure such as in the urethra, bladder, kidneys, and bile ducts; and the like. Ambient pressure can be measured by transmitting a frequency comb at a passive sensor with non-uniform spacing between the transmitted frequencies and measuring the freque...

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Abstract

A method and system of the invention generally relate to measuring ambient pressure in systems comprising incompressible fluids. Particularly, the method and system relate to monitoring pressure within body lumens. The ambient pressure may be measured by transmitting a frequency comb having non-uniform spacing between transmitted frequencies at the passive sensor and measuring the frequency response of the passive sensor. In one embodiment, a higher-order harmonic of the sensor is excited and measured to determine the ambient pressure. In another embodiment, the frequency response of frequencies in-between the transmitted frequencies are measured to determine the ambient pressure.

Description

[0001] This application claims priority to U.S. Provisional Application Serial No. 62 / 661,925, filed April 24, 2018. technical field [0002] The present invention generally relates to a method and system for measuring ambient pressure in a system including an incompressible fluid. In particular, the methods and systems relate to monitoring pressure within a body cavity. Background technique [0003] Prior art pressure measurement systems are based on the measurement of the resonant frequency of a passive mechanical resonator (ie transducer). In the standard mode of operation, this transducer is excited by a drive force provided by an externally located ultrasonic transducer which emits a set of ultrasonic signals spanning a predetermined frequency range. Due to the driving force, the sensor will oscillate with an amplitude and phase that reflect its spectral response, with a maximum amplitude response expected to occur at the resonant frequency. In the case of a pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0215A61B5/03G01H13/00G01L9/00G01N29/036A61B8/04A61B90/00
CPCG01H13/00G01L9/0008G01N29/036A61B8/04G01N29/42G01N2291/02872G01H11/08G01L11/06A61B8/12
Inventor 阿米尔·科恩尤瓦尔·贝克尔埃里奇·S·塔马姆
Owner MICROTECH MEDICAL TECH