Endoscope stiffness measurement device and measurement method

Abstract

The present invention discloses an endoscope stiffness measuring device and a measuring method, and relates to the technical field of medical endoscopes. The endoscope stiffness measuring device comprises a stiffness measuring structure, a conducting structure and a detecting structure, wherein the stiffness measuring structure comprises a contact, the stiffness measuring structure comprises a constant force structure, a resistor, a sliding structure and a contact, the constant force structure is used to drive the contact to move, the sliding structure is respectively connected to the resistor and the contact in a sliding manner, the conducting structure comprises a pull rope, the front end of the pull rope is connected to the constant force structure, and the pull rope is pulled so that the constant force structure drives the contact to move, and the detecting structure comprises a current detecting module and a voltage detecting module, the current detecting module and the voltage detecting module are respectively connected to the resistor through an input wire, and the current detecting module and the voltage detecting module are respectively connected to the contact through an output wire. The present invention can realize the measurement of human tissue stiffness.

Description

Technical Field

[0001] The present invention relates to the technical field of medical endoscopes, and in particular to an endoscope stiffness measuring device and a measuring method. Background Art

[0002] Endoscopic surgery is an important means of "early detection and early treatment" for natural cavity cancers such as the digestive tract, and has gradually been popularized nationwide. During the operation, doctors diagnose lesions by analyzing the color, texture, hardness and other tissue information of abnormal tissues. The narrow-band light imaging and optical magnification functions of the endoscope system can highlight the color and texture information of the tissue, which is convenient for doctors to diagnose. However, there is currently no tool that can directly judge the hardness of tissues. At present, biopsy forceps and other instruments are mostly used clinically to extend through the endoscope instrument channel, touch the suspicious lesions, and make manual judgments. The biopsy forceps themselves are flexible materials and cannot accurately transmit the stiffness information of the object. At the same time, this method has no quantitative indicators and is easily affected by the feel and experience of the operating doctor, and the misjudgment rate is relatively high. If the hardness (rigidity) of the suspected lesion tissue can be measured by an instrument device, the quantitative indicators can be used to effectively reduce the misjudgment rate, which is conducive to the discovery of early lesions and the comparative observation of the condition, and improve the accuracy of the diagnosis results in endoscopic examinations. Summary of the invention

[0003] The purpose of the present invention is to provide an endoscope stiffness measurement device and a measurement method to achieve the measurement of human tissue stiffness.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides an endoscope stiffness measuring device, comprising: a stiffness measuring structure, a conducting structure and a detecting structure, wherein the stiffness measuring structure comprises a contact, the stiffness measuring structure comprises a constant force structure, a resistor, a sliding structure and the contact, the constant force structure is used to drive the contact to move, the sliding structure is respectively slidably connected to the resistor and the contact, the conducting structure comprises a pull rope, the front end of the pull rope is connected to the constant force structure, and the constant force structure drives the contact to move by pulling the pull rope, and the detecting structure comprises a current detecting module and a voltage detecting module, the current detecting module and the voltage detecting module are respectively connected to the resistor through an input wire, and the current detecting module and the voltage detecting module are respectively connected to the contact through an output wire.

[0006] Preferably, the stiffness measurement structure further comprises a stiffness measurement shell, the constant force structure, the resistor and the sliding structure are all located in the stiffness measurement shell, and the contact can extend from the front end of the stiffness measurement shell.

[0007] Preferably, the constant force structure includes a first elastic element, a second elastic element, a third elastic element, a rotating block, a first pull rod and a second pull rod, the first elastic element is sleeved on the contact, one end of the first elastic element is abutted against the first step on the contact, and the other end of the first elastic element is abutted against the second step on the inner side of the stiffness measuring shell, the rotating block is rotatably connected to the stiffness measuring shell, and the rotating block can contact the baffle at the rear end of the contact, the first pull rod is hinged to the rotating block and the second pull rod respectively, the second pull rod is hinged to the front end of the pull rope, one end of the second elastic element is abutted against the second step on the inner side of the stiffness measuring shell, the other end of the second elastic element is abutted against the rotating block, one end of the third elastic element is abutted against the limiting groove in the stiffness measuring shell, and the other end of the third elastic element is abutted against the first pull rod.

[0008] Preferably, the first elastic element, the second elastic element and the third elastic element are all springs.

[0009] Preferably, the expansion and contraction direction of the first elastic element and the expansion and contraction direction of the second elastic element are both the same as the axial direction of the contact, and the expansion and contraction direction of the third elastic element is perpendicular to the axial direction of the contact.

[0010] Preferably, the stiffness measurement structure also includes an outer shell cover and a fixed shaft, the outer shell cover is arranged at the front end of the stiffness measurement outer shell, the outer shell cover is provided with an opening for the contact to pass through, one end of the fixed shaft is connected to the outer shell cover, and the other end of the fixed shaft is connected to the stiffness measurement outer shell.

[0011] Preferably, the conductive structure further comprises a conductive shell, the pull rope, the input wire and the output wire are all located in the conductive shell, and the pull rope is slidably connected to the conductive shell.

[0012] Preferably, a handle is provided at the rear end of the pull rope.

[0013] Preferably, the resistor, the sliding structure and the contact are all made of copper.

[0014] The present invention also provides a measurement method using the endoscope stiffness measurement device, comprising:

[0015] The total impedance of the resistor is R The total length of the resistor is L R , pull the rope, the constant force structure drives the touch movement, the contact contacts the object to be measured, and the change displacement of the contact is , the corresponding resistance impedance change is ,because:

[0016] ,

[0017] So we get for:

[0018] ,

[0019] At the same time, due to:

[0020] ,

[0021] in, It is the voltage detected by the voltage detection module before the resistance displacement changes. is the current detected by the current detection module before the resistance displacement changes. is the voltage detected by the voltage detection module after the resistance displacement changes. It is the current size detected by the current detection module after the resistance displacement changes;

[0022] Then we get:

[0023] ,

[0024] The constant force provided by the constant force structure is F , the stiffness of the object being measured for:

[0025] ,

[0026] Then we get:

[0027] .

[0028] Compared with the prior art, the present invention has achieved the following technical effects:

[0029] The present invention pulls the pull rope to make the constant force structure drive the contact to eject, and the contact contacts the human tissue. The current detection module detects the current, and the voltage detection module detects the voltage, and then the stiffness is obtained, so as to achieve the purpose of measuring the stiffness of the object being measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the endoscope stiffness measurement device of the present invention;

[0032] Figure 2 It is a cross-sectional schematic diagram of the stiffness measurement structure of the present invention;

[0033] Figure 3 It is a principle diagram of a stiffness measurement method of an endoscope stiffness measurement device of the present invention;

[0034] Figure 4 is a flow chart of the stiffness measurement method of the present invention;

[0035] In the figure: 1-stiffness measurement structure, 2-conduction structure, 3-detection structure, 4-contact, 5-resistance, 6-sliding structure, 7-adapter, 8-pull rope, 9-current detection module, 10-voltage detection module, 11-input wire, 12-output wire, 13-stiffness measurement housing, 14-first elastic element, 15-second elastic element, 16-third elastic element, 17-rotating block, 18-first pull rod, 19-second pull rod, 20-first step, 21-second step, 22-blocking piece, 23-limiting groove, 24-housing cover, 25-fixed shaft, 26-handle. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The purpose of the present invention is to provide an endoscope stiffness measurement device and a measurement method to achieve the measurement of human tissue stiffness.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Embodiment 1

[0040] like Figure 1 to Figure 2As shown, this embodiment provides an endoscope stiffness measurement device, including: a stiffness measurement structure 1, a conductive structure 2 and a detection structure 3, the stiffness measurement structure 1 includes a contact 4, the stiffness measurement structure 1 includes a constant force structure, a resistor 5, a sliding structure 6 and a contact 4, the resistor 5, the sliding structure 6 and the contact 4 are all made of copper, the constant force structure is used to drive the contact 4 to move, the sliding structure 6 is slidingly connected to the resistor 5 and the contact 4 respectively, the conductive structure 2 includes a pull rope 8, the front end of the pull rope 8 is connected to the constant force structure, and the rear end of the pull rope 8 is provided with a handle 26, when the pull rope 8 is pulled, the constant force structure drives the contact 4 to move, and the detection structure 3 includes a current detection module 9 and a voltage detection module 10, the current detection module 9 and the voltage detection module 10 are respectively connected to the resistor 5 through an input wire 11, and the current detection module 9 and the voltage detection module 10 are respectively connected to the contact 4 through an output wire 12.

[0041] Specifically, in this embodiment, the stiffness measurement structure 1 further includes a stiffness measurement housing 13 , the constant force structure, the resistor 5 and the sliding structure 6 are all located in the stiffness measurement housing 13 , and the contact 4 can extend from the front end of the stiffness measurement housing 13 .

[0042] In this embodiment, the stiffness measurement structure 1 also includes an outer shell cover 24 and a fixed shaft 25. The outer shell cover 24 is arranged at the front end of the stiffness measurement housing 13. The outer shell cover 24 is provided with an opening for the contact 4 to pass through. One end of the fixed shaft 25 is connected to the outer shell cover 24, and the other end of the fixed shaft 25 is connected to the stiffness measurement housing 13. The fixed shaft 25 is used to fix the outer shell cover 24 on the stiffness measurement housing 13.

[0043] In this embodiment, the constant force structure includes a first elastic element 14, a second elastic element 15, a third elastic element 16, a rotating block 17, a first pull rod 18 and a second pull rod 19. The first elastic element 14, the second elastic element 15 and the third elastic element 16 are all springs. The first elastic element 14 is sleeved on the contact 4, one end of the first elastic element 14 is against the first step 20 on the contact 4, and the other end of the first elastic element 14 is against the second step 21 inside the stiffness measurement housing 13. The rotating block 17 is against the stiffness measurement housing. 13 is rotatably connected, the rotating block 17 can contact the baffle 22 at the rear end of the contact 4, the first pull rod 18 is hinged to the rotating block 17 and the second pull rod 19 respectively, the second pull rod 19 is hinged to the front end of the pull rope 8, one end of the second elastic element 15 is abutted against the blind hole in the second step 21 on the inner side of the stiffness measuring housing 13, the other end of the second elastic element 15 is abutted against the rotating block 17, one end of the third elastic element 16 is abutted against the limiting groove 23 in the stiffness measuring housing 13, and the other end of the third elastic element 16 is abutted against the first pull rod 18. Pull the pull rope 8, the pull rope 8 drives the second pull rod 19 to move, the second pull rod 19 drives the first pull rod 18 to move, the third elastic element 16 is compressed, the first pull rod 18 drives the rotating block 17 to move, the rotating block 17 rotates, so that the rotating block 17 is separated from the baffle 22, the second elastic element 15 is compressed, the limiting of the baffle 22 by the rotating block 17 is released, the first elastic element 14 is extended, so that the contact 4 can be ejected under the action of the elastic force of the first elastic element 14, the second elastic element 15 and the third elastic element 16 are used for the return of the rotating block 17, the first pull rod 18, the second pull rod 19 and the pull rope 8.

[0044] In this embodiment, the expansion and contraction direction of the first elastic element 14 and the expansion and contraction direction of the second elastic element 15 are both the same as the axial direction of the contact 4 , and the expansion and contraction direction of the third elastic element 16 is perpendicular to the axial direction of the contact 4 .

[0045] In this embodiment, the conductive structure 2 also includes a conductive shell, which is connected to the stiffness measurement shell 13 through the adapter 7. The pull rope 8, the input wire 11 and the output wire 12 are all located in the conductive shell, and the pull rope 8 is slidably connected to the conductive shell.

[0046] The contact 4, the sliding structure 6 and the resistor 5 form a sliding rheostat, and the displacement of the contact 4 can be calculated by measuring the resistance of the rheostat. , the contact 4 can be ejected by pulling the pull rope 8 backward for a certain distance. When there is no contact with the tissue, the pull rope 8 only produces a fixed relative displacement with the stiffness measurement housing 13. When the tissue appears, the displacement distance of the contact 4 ejected will be shortened, and the displacement distance of the resistor 5 is the same as the displacement distance of the object deformation. equal, that is, the distance that the current flows through the resistor 5 is shortened, the resistance is reduced, and the current becomes larger. If the deformation of the object is smaller, the relative stiffness is greater.

[0047] Embodiment 2

[0048] like Figure 3 to Figure 4 As shown, this embodiment provides a measurement method using the endoscope stiffness measurement device of embodiment 1, comprising:

[0049] The endoscope stiffness measurement device enters the human body through the endoscope instrument channel, and the total impedance of resistor 5 is R , the total length of resistor 5 is L R , pull the pull rope 8, the constant force structure drives the touch movement, the contact 4 contacts the object to be measured (human tissue), and the change displacement of the contact 4 is , the corresponding impedance change of resistor 5 is ,because:

[0050] ,

[0051] So we get for:

[0052] ,

[0053] At the same time, due to:

[0054] ,

[0055] in, is the voltage detected by the voltage detection module 10 before the resistor 5 changes its displacement, is the current magnitude detected by the current detection module 9 before the resistor 5 changes its displacement, is the voltage detected by the voltage detection module 10 after the resistor 5 changes its displacement, is the current magnitude detected by the current detection module 9 after the resistor 5 is displaced;

[0056] Then we get:

[0057] ,

[0058] The constant force provided by the constant force structure is F , the stiffness of the object being measured for:

[0059] ,

[0060] Then we get:

[0061] .

[0062] The endoscope stiffness measuring device and method of the present invention have the following advantages:

[0063] Rapidity: Pure mechanical measurement can quickly obtain human tissue stiffness information, which is accurate and intuitive;

[0064] Simple operation: The operation part adopts ergonomic design, which simplifies the measurement process, and adopts scale design, which can directly observe the results;

[0065] High-precision measurement: Provide accurate tissue stiffness measurement data through high-precision spring measurement;

[0066] Cost-effectiveness: The device is simple in design, easy to sterilize, reusable, and reduces costs;

[0067] Wide range of applications: can be applied to a variety of medical scenarios, including but not limited to examination and surgery of the digestive tract, respiratory tract, etc.;

[0068] Promoting disease diagnosis and treatment: By measuring the stiffness of human tissue, it can help doctors better identify diseased tissue, thereby improving the accuracy of disease diagnosis and guiding more precise treatment.

[0069] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An endoscope stiffness measurement device, characterized in that: include: A stiffness measurement structure, a conduction structure and a detection structure, wherein the stiffness measurement structure comprises a contact, the stiffness measurement structure comprises a constant force structure, a resistor, a sliding structure and a contact, the constant force structure is used to drive the contact to move, the sliding structure is slidingly connected to the resistor and the contact respectively, the contact, the sliding structure and the resistor constitute a sliding rheostat, the conduction structure comprises a pull rope, the front end of the pull rope is connected to the constant force structure, and the pull rope is pulled so that the constant force structure drives the contact to move, the detection structure comprises a current detection module and a voltage detection module, the current detection module and the voltage detection module are respectively connected to the resistor through an input wire, and the current detection module and the voltage detection module are respectively connected to the contact through an output wire.

2. The endoscope stiffness measuring device according to claim 1, characterized in that: The stiffness measurement structure further comprises a stiffness measurement housing, the constant force structure, the resistor and the sliding structure are all located in the stiffness measurement housing, and the contact can extend from the front end of the stiffness measurement housing.

3. The endoscope stiffness measuring device according to claim 2, characterized in that: The constant force structure includes a first elastic element, a second elastic element, a third elastic element, a rotating block, a first pull rod and a second pull rod. The first elastic element is sleeved on the contact, one end of the first elastic element is abutted against the first step on the contact, and the other end of the first elastic element is abutted against the second step on the inner side of the stiffness measuring shell. The rotating block is rotatably connected to the stiffness measuring shell, and the rotating block can contact the baffle at the rear end of the contact. The first pull rod is hinged to the rotating block and the second pull rod respectively, and the second pull rod is hinged to the front end of the pull rope. One end of the second elastic element is abutted against the second step on the inner side of the stiffness measuring shell, and the other end of the second elastic element is abutted against the rotating block. One end of the third elastic element is abutted against the limiting groove in the stiffness measuring shell, and the other end of the third elastic element is abutted against the first pull rod.

4. The endoscope stiffness measuring device according to claim 3, characterized in that: The first elastic element, the second elastic element and the third elastic element are all springs.

5. The endoscope stiffness measuring device according to claim 3, characterized in that: The expansion and contraction direction of the first elastic element and the expansion and contraction direction of the second elastic element are both the same as the axial direction of the contact, and the expansion and contraction direction of the third elastic element is perpendicular to the axial direction of the contact.

6. The endoscope stiffness measuring device according to claim 2, characterized in that: The stiffness measurement structure also includes an outer shell cover and a fixed shaft. The outer shell cover is arranged at the front end of the stiffness measurement shell. An opening for the contact to pass through is opened on the outer shell cover. One end of the fixed shaft is connected to the outer shell cover, and the other end of the fixed shaft is connected to the stiffness measurement shell.

7. The endoscope stiffness measuring device according to claim 1, characterized in that: The conductive structure further comprises a conductive shell, the pull rope, the input wire and the output wire are all located in the conductive shell, and the pull rope is slidably connected to the conductive shell.

8. The endoscope stiffness measuring device according to claim 1, characterized in that: A handle is arranged at the rear end of the pull rope.

9. The endoscope stiffness measuring device according to claim 1, characterized in that: The resistor, the sliding structure and the contact are all made of copper.

10. A measurement method using the endoscope stiffness measurement device according to any one of claims 1 to 9, characterized in that: include: The total impedance of the resistor is R The total length of the resistor is L R , pull the rope, the constant force structure drives the touch movement, the contact contacts the object to be measured, and the change displacement of the contact is , the corresponding resistance impedance change is ,because: ， So we get for: ， At the same time, due to: ， in, It is the voltage detected by the voltage detection module before the resistance displacement changes. is the current detected by the current detection module before the resistance displacement changes. is the voltage detected by the voltage detection module after the resistance displacement changes. It is the current size detected by the current detection module after the resistance displacement changes; Then we get: ， The constant force provided by the constant force structure is F , the stiffness of the object being measured for: ， Then we get: 。

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