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A puncture force measurement device and measurement method based on the principle of laser speckle interference

A technology of laser speckle and measuring device, which is applied in the directions of measuring device, measuring force, puncture needle, etc., can solve the problems of inability to accurately obtain the force condition close to the puncture tip, large interference factors of the tip puncture force, and low precision, etc. The effect of information loss, low measurement environment requirements, and high accuracy

Active Publication Date: 2021-12-07
TIANJIN UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the puncture force is mainly obtained by the sensor installed at the end of the needle. This measurement method has low precision, and there are large interference factors during the measurement of the puncture force at the tip. It is impossible to accurately obtain the force near the puncture tip.

Method used

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  • A puncture force measurement device and measurement method based on the principle of laser speckle interference
  • A puncture force measurement device and measurement method based on the principle of laser speckle interference
  • A puncture force measurement device and measurement method based on the principle of laser speckle interference

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Embodiment Construction

[0047] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0048] as attached Figure 1 to Figure 3 As shown, a puncture force measurement device based on the principle of laser speckle interference includes a housing, a needle insertion unit, a laser irradiation unit and a camera unit.

[0049] (1) Shell

[0050] The outer shell includes an outer protective sheath 1 and an inner soft sleeve 2 , and the inner soft sheath 2 is arranged inside the outer protective sheath 1 . The outer protective sheath 1 is provided with a needle outlet duct 3, a lighting duct and a camera duct, the needle outlet duct 3, the lighting duct and the camera duct are arranged side by side in the longitudinal direction, and arranged in a triangular shape in the transverse direction. The needle pipeline 3 is located at the ...

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Abstract

The invention discloses a puncture force measurement device and a measurement method based on the principle of laser speckle interference, including a needle insertion unit, a laser irradiation unit and a camera unit; the needle insertion unit includes a puncture needle body, and the puncture needle body is driven by a Drive to realize automatic needle insertion; the laser irradiation unit includes laser fiber, beam splitter, beam expander I and beam expander II. The reflected light is collected through the camera pipe, and the other beam passes through the beam expander II to form the reference light; the camera unit includes an imaging lens, a mirror, a half-mirror, a CCD photoelectric sensor and a CCD conductive line, for the reference light and The reflected light interferes to form a speckle interference image, which is transmitted to the outside of the human body. The invention measures the force on the tip of the puncture needle by laser, improves the accuracy of puncture force measurement, ensures that the needle tip of the operation needle can be accurately controlled to a certain target position area, and ensures the success rate of the operation.

Description

technical field [0001] The invention relates to the medical technology of puncture surgery, in particular to a puncture force measurement device and a puncture force measurement method based on the principle of laser speckle interference. Background technique [0002] Percutaneous puncture into soft tissue with a surgical needle is a very important part of modern clinical medicine. There are more and more application requirements in clinical medicine, such as biopsy, injection, neurosurgery and cancer treatment. Similar minimally invasive treatments. The key point of puncture surgery is to precisely control the needle tip of the surgical needle to a certain target area. However, due to the interaction between the surgical needle and the surrounding tissue and the complex environment inside the tissue during the puncture process, both the tissue and the surgical needle are deformed. The needle will deviate from the intended path of motion and eventually fail to reach the tar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/24A61B17/34
CPCA61B17/3403G01L1/242
Inventor 宋乐侯宇鹏
Owner TIANJIN UNIV
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