Device and method for measuring the viscoelastic properties of a viscoelastic medium

A viscoelastic, medium technology, applied in the field of viscoelastic devices, can solve the problems of difficult operation of probes, defects, and high sound energy

Active Publication Date: 2018-10-16
ECHOSENS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This protocol is not suitable for applying transient shear pulses to tissue, only for continuous wave shear wave oscillations
Furthermore, the elastography probe consists of two separate components, which is a serious drawback for in-vivo applications
For example, the above probes are difficult to manipulate due to the presence of multiple parts
[0016] Also, depending on the operator, it can be difficult to control the force applied when placing the ultrasound transducer on the patient's body
Therefore, the device cannot perform accurate and reproducible measurements independently of the operator
[0017] Finally, the acoustic energy delivered to the patient by the sensor's ultrasonic transducer is high, and unnecessary use may result in injury to the patient, electrical failure, and premature failure of the ultrasonic transducer

Method used

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  • Device and method for measuring the viscoelastic properties of a viscoelastic medium

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Embodiment Construction

[0104] A first aspect of the invention provides a device DEV for measuring the viscoelasticity of a viscoelastic medium which has an ultrasound signal after ultrasound irradiation. Specifically, the device DEV of the present invention can quantify liver fibrosis in an immediate and non-invasive manner.

[0105] According to selected to illustrate an aspect of the invention according to, figure 2 In the example shown, the device DEV comprises an ultrasound probe 1 . figure 2 A cross-sectional view of the probe 1 is shown.

[0106] Described ultrasonic probe 1 comprises:

[0107] a probe housing PC comprising at least one vibrator or electric actuator VIB; in a particular embodiment, said vibrator VIB comprises a fixed part FIX and a movable part MOV;

[0108] a first vertical bar F1 , a second vertical bar F2 and a horizontal bar F configured to fix said fixing portion FIX of said vibrator VIB to said probe housing PC;

[0109] - an ultrasonic transducer US with an axis o...

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Abstract

The invention relates to a device (DEV) and a method for measuring the viscoelastic properties of a viscoelastic medium, and the medium has ultrasonic signals after receiving ultrasonic wave pulses. The device comprises: at least one probe (1) for elastography, comprising at least one ultrasonic transducer (2) constructed and arranged to transmit and receive ultrasonic signals, a movable tip (3) constructed and arranged to be embedded in the end of the ultrasonic transducer (2), and an electric actuator (4) constructed and configured to cause displacement of the movable tip (3). The device (DEV) comprises a signal generator (9) that emits a contact completion signal when the transducer (2) of the ultrasonic probe (1) contacts the viscoelastic medium to be measured.

Description

technical field [0001] The present invention relates to a device for measuring the viscoelasticity of viscoelastic media, such as human or animal organs. In particular, the present invention can be used to measure the viscoelasticity of the liver, allowing the quantification of the amount of fibrosis present in said liver. The invention also relates to a method for measuring the viscoelasticity of a viscoelastic medium. Background technique [0002] Chronic hepatitis, alcoholic, viral, or otherwise, has a fibrotic effect, which is important to evaluate and determine the optimal time to treat hepatitis. [0003] One of the most reliable and valid techniques for measuring liver stiffness is transient elastography (see, for example, "WFUMBguidelines and Recommendations for clinical use of ultrasound elastography part 3: liver"). [0004] Applicant has developed and commercialized a method called (See for example the devices of patents EP1169636 and EP1531733). The device ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/08A61B8/00
CPCA61B8/0833A61B8/44A61B8/4483A61B8/485A61B8/08A61B8/4254A61B8/429A61B8/543A61B8/4494
Inventor 洛朗·桑德兰
Owner ECHOSENS SA
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