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Puncture force measuring device and measuring method based on laser speckle interference principle

A laser speckle and measurement device technology, which is applied in the direction of measurement devices, puncture needles, and measurement forces, can solve the problems of inability to accurately obtain the force close to the puncture tip, large interference factors of tip puncture force, and low precision, so as to reduce The effects of information loss, low measurement environment requirements, and high precision

Active Publication Date: 2021-03-02
TIANJIN UNIV
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  • Claims
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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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  • Puncture force measuring device and measuring method based on laser speckle interference principle
  • Puncture force measuring device and measuring method based on laser speckle interference principle
  • Puncture force measuring device and measuring method based on laser speckle interference principle

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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) Housing

[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 th...

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Abstract

The invention discloses a puncture force measuring device and measuring method based on the laser speckle interference principle. The puncture force measuring device comprises a needle inserting unit,a laser irradiation unit and a camera shooting unit. The needle inserting unit comprises a puncture needle body, and the puncture needle body is driven by a motor to achieve automatic needle inserting. The laser irradiation unit comprises a laser optical fiber, a spectroscope, a beam expander I and a beam expander II, the spectroscope divides laser into two beams, one beam passes through the beamexpander I and then irradiates the surface of a puncture tissue, reflected light is collected and formed through a camera shooting pipeline, and the other beam passes through the beam expander II andthen forms reference light; the camera shooting unit comprises an imaging lens, a reflector, a semi-transparent semi-reflective mirror, a CCD photoelectric sensor and a CCD conduction wire, interferes with reference light and reflected light to form a speckle interference image, and transmits the speckle interference image to the outside of a human body. The stress of the tip of the puncture needle is measured through laser, the accuracy of puncture force measurement is improved, the tip of the operation needle is accurately controlled to a certain target position area, and the success rate of an operation is guaranteed.

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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IPC IPC(8): G01L1/24A61B17/34
CPCA61B17/3403G01L1/242
Inventor 宋乐侯宇鹏
Owner TIANJIN UNIV
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