Neurosurgical suction tube with sensing function

Abstract

The application provides a neurosurgical suction tube with a sensing function, and belongs to the technical field of medical devices. The technical points are as follows: the neurosurgical suction tube body is a flexible bending structure with a rhombic cutting notch and a hollow tube with an externally-attached optical fiber transmission path; a multi-sensor fusion sensing device comprises: four groups of signal acquisition lines which are uniformly and spacedly arranged along the periphery of the neurosurgical suction tube body; each group of the signal acquisition lines comprises: an end electrode, two groups of Bragg grating nodes, an optical path transmission optical fiber and an electrical transmission copper wire; the first group of Bragg grating nodes is located in correspondence with the bending structure; the electrical signal and the optical signal are independent of each other in information acquisition and transmission, and do not affect each other. By using the technical scheme, the force in the operation process can be sensed, the surface reaction force distribution and the positioning depth information of the hard package body of the intraoperative tissue are reconstructed through force touch, and efficient electrode impedance spectrum detection and imaging are guided.

Description

Technical Field

[0001] This invention belongs to the technical field of medical devices, specifically relating to a neurosurgical suction tube with sensing function. Background Technology

[0002] Neurosurgeons often use suction tubes to help remove excess internal tissue and fluid during surgery, such as tissue debris, blood, and brain tumors. Sometimes, doctors also use suction tubes to manipulate tissue to assist in the removal of brain tumors.

[0003] Existing suction tubes (e.g., CN101829389A, CN103977497A, CN201775856U, CN201775856U) allow for adjustment of suction force by varying finger pressure at the handheld end. However, they lack precise sensing of the force applied during contact with the suction tube tip, which is particularly important in neurosurgery where minimizing iatrogenic damage to healthy brain tissue is crucial. Furthermore, tumor resection surgery often requires ensuring complete tumor removal while avoiding extensive resection. Due to the unique nature of neurosurgery, intraoperative differentiation between tumor and healthy tissue relies heavily on the surgeon's clinical experience. Although postoperative imaging analysis can assess the surgical resection outcome, the need for a second surgery is extremely high.

[0004] In response, rapid bioelectrical impedance spectroscopy detection and imaging under the guidance of force sensing and force-sensing palpation during intraoperative fine manipulation to ensure safe surgery and identify malignant tissue margins has become a technical approach worthy of further research.

[0005] Therefore, developing a neurosurgical suction tube with sensing function (force sensing) has become an urgent technical problem to be solved. Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the prior art and to provide a neurosurgical suction tube with sensing function.

[0007] The technical solution of this application is as follows:

[0008] A neurosurgical suction tube with sensing function includes: a neurosurgical suction tube body (1) and a multi-sensor fusion sensing device (2);

[0009] Among them, the neurosurgical suction tube body (1) is a hollow tube with a flexible flexural structure (1-1);

[0010] Among them, the multi-sensor fusion sensing device (2) includes: 4 sets of signal acquisition lines, the 4 sets of signal acquisition lines have the same structure and the 4 sets of signal acquisition lines are evenly spaced along the outer periphery of the neurosurgical suction tube body (1), and the phase angle difference between adjacent signal acquisition lines is 90°.

[0011] Each of the signal acquisition lines includes: a first Bragg grating node (2-2), a second Bragg grating node (2-3), and an optical fiber (2-4); the first Bragg grating node (2-2) and the second Bragg grating node (2-3) are disposed on the optical fiber (2-4);

[0012] The first Bragg grating node (2-2) corresponds to the flexural structure (1-1);

[0013] The distance between the second Bragg grating node (2-3) and the end of the optical fiber is greater than the distance between the first Bragg grating node (2-2) and the end of the optical fiber.

[0014] Furthermore, each of the signal acquisition lines also includes a metal electrode (2-1); a metal electrode (2-1) is provided at the end of the optical fiber (2-4).

[0015] Furthermore, the distance between the second Bragg grating node (2-3) and the metal electrode (2-1) is greater than the distance between the first Bragg grating node (2-2) and the metal electrode (2-1).

[0016] Furthermore, the second Bragg grating node (2-3) is used to sense lateral force; the first Bragg grating node (2-2) and the second Bragg grating node (2-3) are used together to decouple the sensing of axial force.

[0017] Furthermore, the metal electrode (2-1) is used for excitation and signal acquisition.

[0018] Furthermore, the flexural structure (1-1) is formed by cutting a groove in the body of the neurosurgical suction tube (1).

[0019] Furthermore, the groove has a diamond-shaped cut.

[0020] Furthermore, the four signal acquisition lines are named in the following order on the outer periphery of the neurosurgical suction tube body (1): the first signal acquisition line, the second signal acquisition line, the third signal acquisition line, and the fourth signal acquisition line.

[0021] The method for obtaining temperature changes through four sets of signal acquisition lines is as follows:

[0022] S100, obtain λ 2-1 , λ2-3 , Δλ 2-1 , Δλ 2-3 , λ 1-1 , λ 1-3 , Δλ 1-1 , Δλ 1-3 ;

[0023] Where, λ i-j Δλ represents the center wavelength of the node corresponding to the i-th Bragg grating node in the j-th group; i-j This represents the center wavelength offset corresponding to the i-th Bragg grating node in the j-th group; i = 1, 2; j = 1, 3;

[0024] S200, calculate the temperature change ΔT1 at the sensing area of ​​the first Bragg grating node and the temperature change ΔT2 at the sensing area of ​​the second Bragg grating node. The temperature sensing is a change, and its reference value is the ambient temperature.

[0025]

[0026]

[0027] Among them, a f ε represents the coefficient of thermal expansion of the Bragg grating node; f This represents the thermo-optical coefficient of the Bragg grating node.

[0028] Furthermore, obtain the lateral force F. x F y The method is:

[0029] S100, obtain Δλ 2-1 , Δλ 2-2 , Δλ 2-3 , Δλ 2-4 ; where Δλ i-j This represents the center wavelength offset corresponding to the i-th Bragg grating node in the j-th group; i = 2; j = 1, 2, 3, 4;

[0030] S200, solve for F x F y :

[0031]

[0032] in, It is a constant matrix whose parameters are obtained through calibration experiments and are known quantities.

[0033] Furthermore, obtain the longitudinal force F. z The method is:

[0034] S100, obtain Δλ 1-1 , Δλ1-2 , Δλ 1-3 , Δλ 1-4 , Δλ 2-1 , Δλ 2-2 , Δλ 2-3 , Δλ 2-4 ;Δλ i-j This represents the center wavelength offset corresponding to the i-th Bragg grating node in the j-th group; i = 1, 2; j = 1, 2, 3, 4;

[0035] S200, solve for F z :

[0036]

[0037] in, Given quantities These represent the mapping coefficient constants related to the temperature change (which can be obtained through calibration), a f ε represents the coefficient of thermal expansion of the Bragg grating node; f λ represents the thermo-optical coefficient of the Bragg grating node, and λ0 represents the initial wavelength;

[0038] in, l represents the distance from the left end of the neurosurgical suction tube body to the holding point; x1 and x2 represent the distances from the first and second Bragg grating nodes to the holding point, respectively.

[0039] in, It is a constant coefficient matrix, obtained through calibration experiments.

[0040] The advantages of the technical solution of this invention are mainly reflected in:

[0041] (1) This application proposes a surgical suction tube with sensing function, which can accurately sense tissue manipulation forces during surgery. Specifically, two Bragg grating nodes are set on the optical fibers of four signal acquisition lines. The first Bragg grating node 2-2 is used to sense lateral forces. The second Bragg grating node 2-3 and the first Bragg grating node 2-2 are used together to decouple the sensing of axial forces.

[0042] (2) This application provides the lateral force F x F y Solution method:

[0043]

[0044] (3) This application provides the longitudinal force F z Solution method:

[0045]

[0046] (4) This application proposes a multifunctional neurosurgical suction tube that integrates force tactile perception and tissue property detection (the end of the optical fiber is equipped with an electrode with impedance detection capability), which helps doctors accurately perceive the tissue manipulation force during the operation, and helps to identify malignant tumor tissue in real time during the operation and perform tumor margin identification and depth imaging through force palpation-guided tissue impedance spectrum detection, thereby avoiding the need for secondary surgery. Attached Figure Description

[0047] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings, but this does not constitute any limitation on the present invention.

[0048] Figure 1 This is a structural design diagram of the surgical suction tube with sensing function according to the present invention.

[0049] The annotations in the attached figures are explained as follows:

[0050] Neurosurgical suction tube body 1, flexural structure 1-1;

[0051] Metal electrode 2-1, first Bragg grating node 2-2, second Bragg grating node 2-3, optical fiber 2-4. Detailed Implementation

[0052] The surgical navigation spatial registration method proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0053] The embodiments of the present invention are described as a processing flow. Although the various operation steps of the flow may be given sequential step numbers, the operation steps may be implemented in parallel, concurrently, or simultaneously.

[0054] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of this art, the specific embodiments, and the particular context. Certain terms used to describe these embodiments will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in relation to the description of this case.

[0055] The terms “contains,” “includes,” and “has” used in this article are all open-ended, meaning they include but are not limited to.

[0056] In embodiments of the present invention, the data “and / or” may be used, and “and / or” includes any and all combinations of one or more of the listed associated features.

[0057] It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention.

[0058] To make the advantages of the technical solutions in the embodiments of the present invention clearer, the exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0059] <Example 1: A neurosurgical suction tube with sensing function>

[0060] I. Structural Design

[0061] like Figure 1 As shown, a neurosurgical suction tube with sensing function includes: a neurosurgical suction tube body 1 and a multi-sensor fusion sensing device 2.

[0062] Among them, the neurosurgical suction tube body 1 is a hollow tube with a flexible flexural structure 1-1.

[0063] The multi-sensor fusion sensing device 2 includes four sets of signal acquisition lines, referred to as the first set of signal acquisition lines, the second set of signal acquisition lines, the third set of signal acquisition lines, and the fourth set of signal acquisition lines. The four sets of signal acquisition lines are evenly spaced along the outer periphery of the neurosurgical suction tube body 1. That is, the first set of signal acquisition lines and the third set of signal acquisition lines are 180° apart, and the second set of signal acquisition lines and the fourth set of signal acquisition lines are 180° apart.

[0064] Each signal acquisition line group includes: a metal electrode 2-1, a first Bragg grating node (FBG) 2-2, a second Bragg grating node (FBG) 2-3, and an optical fiber 2-4. A metal electrode 2-1 is disposed at the first end of the optical fiber 2-4, and the first Bragg grating node 2-2 and the second Bragg grating node 2-3 are sequentially disposed along the signal transmission direction of the optical fiber. The first Bragg grating node 2-2 corresponds to the flexural structure.

[0065] The metal electrode 2-1 is used for excitation and signal acquisition. The first Bragg grating node 2-2 is used to sense lateral force. The second Bragg grating node 2-3 and the first Bragg grating node 2-2 are used together to decouple the sensing of axial force.

[0066] The flexural structure 1-1 is a groove cut into the body of the neurosurgical suction tube 1 to facilitate better deformation of the optical fiber.

[0067] The integrated tube flexure structure design and the fiber Bragg grating (FBG) element with force-induced strain sensing capabilities provide suction and pressure sensing in surgical procedures and provide the planning prior data required for palpation-guided detection.

[0068] <II. Mathematical Foundations>

[0069] The following is a scheme for head contact triaxial force sensing in the case of a FBG (Fasten-Free Group) layout on the peripheral side of the neurosurgical suction tube body 1:

[0070] A Bragg grating node is a distributed Bragg reflector constructed in a short section of optical fiber, capable of reflecting light of a specific wavelength while transmitting light of all other wavelengths. Its reflected wavelength is sensitive to temperature and strain, and the resonant wavelength of the grating depends on its effective refractive index and period.

[0071] That is, the center wavelength of light reflection is λ. B =2n eff ·∧;wherein, λ B Indicates: center wavelength of reflected light; n eff ∧ represents the refractive index; ∧ represents the grating period.

[0072] Under the influence of temperature and strain, the wavelength of the reflected light from the Bragg grating shifts. The relationship between the shift in the center wavelength of light reflection and temperature and strain is as follows:

[0073] Where Δλ represents the center wavelength offset of the Bragg wavelength; λ represents the center wavelength of the Bragg wavelength; ρ ε Δε represents the optical strain coefficient; Δε represents the fiber grating strain; a f ε represents the coefficient of thermal expansion; f ΔT represents the thermo-optical coefficient; ΔT represents the temperature change.

[0074] Depend on Figure 1 It can be seen that the neurosurgical suction tube body 1 has a dual Bragg grating sensing area, in which FBG 1-s (s = 1, 2, 3, 4: refers to the first Bragg grating node of the signal acquisition line in group s) is used to decouple the sensing of axial force, FBG 2-s (s = 1, 2, 3, 4: refers to the second Bragg grating node of the signal acquisition line in group s) is used to sense lateral force. Simultaneously, in a four-fiber 90° spacing layout, the wavelength shift of each group of relative fiber grating nodes can be eliminated by adding them together to remove force-induced wavelength shift, thereby decoupling the temperature change corresponding to the wavelength shift. That is, for FBG... 2-1 and FBG 2-3 The relationship between the reflected wavelength shift and strain and temperature is as follows:

[0075]

[0076] Where, Δλ 2-1 Indicates FBG 2-1 The center wavelength shift at that location;

[0077] Δλ 2-3 Indicates FBG 2-3 The center wavelength shift at that location;

[0078] λ 2-1 , λ 2-3 They represent FBG respectively 2-1 , FBG 2-3 The corresponding node center wavelength;

[0079] Δε F This represents the strain of the fiber grating under the action of force F;

[0080] ΔT2 represents the temperature change at the location of the sensing area of ​​the second Bragg grating node.

[0081] Adding the two equations above together, we get:

[0082]

[0083] in, The center wavelength shift is caused by temperature changes in the sensing area of ​​the second Bragg grating node.

[0084] Similar to the above formula, we can obtain:

[0085]

[0086] This indicates the shift in the center wavelength of the grating node caused by temperature changes in the sensing area of ​​the first Bragg grating node.

[0087] Δλ 1-1 Indicates FBG 1-1 The center wavelength shift at that location;

[0088] Δλ 1-3 Indicates FBG 1-3 The center wavelength shift at that location;

[0089] λ 1-1 and λ 1-3 Indicates FBG 1-1 , FBG 1-3 The corresponding center wavelength;

[0090] ΔT1 represents the temperature change at the sensing area of ​​the first Bragg grating node;

[0091] In the above two equations, except for ΔT which is an unknown quantity, all other quantities can be obtained from fiber grating parameter manuals and measurements, so the temperature change can be calculated directly.

[0092] The two sensing regions of the proposed structural layout (i.e., the regions of the neurosurgical suction tube body 1 corresponding to the first and second Bragg grating nodes) are simultaneously affected by axial and lateral forces. To improve the sensitivity to axial force sensing in the region where the first Bragg grating node is located, a flexural structure is set in the central area of ​​the grating, which allows the FBG... 1-s It can achieve greater Z-axis force-induced strain.

[0093] Considering that there is a lot of coupling between the transverse and axial forces of the fiber optic tube under external force, especially in the area where the first Bragg grating node is located, the transverse force is decoupled from the fiber optic strain information in the area where the second Bragg grating node is located.

[0094] The fiber Bragg grating layout determines the FBG for the region where the second Bragg grating node is located. 2-s The wavelength shift caused by axial force and temperature changes is the same, i.e., FBG 1-s To eliminate the common-mode effect, the remaining modes in the fiber grating reflection wavelengths at the two locations in the sensing region after subtracting the effects of axial force and temperature common-mode are defined as the decoupled sensing quantities, which are linearly related to the transverse force:

[0095]

[0096] Indicates FBG 2-i The observed center wavelength shift of the grating node after eliminating the effects of temperature and axial force.

[0097] Δλ 2-i Indicates FBG 2-i The center wavelength offset of the grating node.

[0098] Indicates FBG 2-i grating nodes under axial force F z The center wavelength shift caused by the action.

[0099] The center wavelength shift of the i-th grating node under the influence of temperature T.

[0100] F x F y F z These represent the forces acting in the x, y, and z directions, respectively.

[0101] These represent the mapping coefficient constants related to the triaxial force and temperature changes, respectively.

[0102] Therefore, the decoupled fiber-optic sensing lateral force satisfies:

[0103]

[0104] The relationship between the center wavelength shift measured by the fiber Bragg grating and the lateral force can be expressed in matrix form as follows:

[0105]

[0106] Where F is the transverse force matrix to be solved [F X F y ] T Δλ is the change in fiber wavelength obtained by direct measurement; C is a constant matrix that does not depend on the former two and its only source is the experimental method, that is, it is obtained through calibration experiments.

[0107] Represented as a pseudo-inverse matrix:

[0108]

[0109] When the suction tube is subjected to an external force, FBG 1-s Simultaneously affected by axial and lateral forces, in order to eliminate the reflection wavelength shift caused by the lateral force, considering the symmetrical distribution of grating nodes around the sensing area, and with the two grating nodes on each side fabricated and arranged on the same optical fiber (i.e., the first and second Bragg grating nodes are simultaneously set on one optical fiber), the deformation of the attraction tube during the sensing process is simplified as a cantilever beam. Under the action of the lateral force at the free end, the deformation and deflection distribution along the length of the cantilever beam is expressed as follows:

[0110]

[0111] The deformation ratio of the two sensing regions under the action of lateral force can be obtained:

[0112]

[0113] y 1-i Indicates FBG 1-i Deflection deformation of a position under lateral force;

[0114] y 2-i Indicates FBG 2-i Deflection deformation of a position under lateral force;

[0115] l represents the simplified cantilever beam length of the suction tube, which is the distance from the free end force to the support point (i.e., the handhold).

[0116] x1 and x2 represent FBG respectively.1-i and FBG 2-i The distance from the center to the origin of the cantilever beam;

[0117] FBG 1-i and FBG 2-i The center position of the grating is determined, therefore k i It is a constant value.

[0118] Therefore, FBG 1-i and FBG 2-i The reflection wavelength shift caused by the lateral force is linearly related, that is:

[0119]

[0120] FBG caused by lateral force 1-i The center wavelength offset at that location;

[0121] FBG caused by lateral force 2-i The center wavelength offset at that location;

[0122] Ideally, the optical fibers would be distributed symmetrically along the tube axis, such that k1 = k2 = k3 = k4.

[0123] At this point, FBG can be used. 1-s Each grating wavelength in the array is defined as a new variable:

[0124]

[0125] The new variable will FBG 1-s Subtract from FBG 2-s The linearly dependent portion, whose remaining wavelength is only affected by axial force and temperature, can be rewritten as:

[0126]

[0127] k0 is a point in the sensing region (i.e., FBG) 1-s Perceptual area 1) and perceptual area 2 (i.e., FBG) 2-s The ratio of temperature change at the perceived area can be obtained through experimental calibration.

[0128] To eliminate the effects of temperature changes, let Right now Only related to axial force, k0 is the ratio of the center wavelength shift caused by temperature changes in sensing region one to sensing region two.

[0129] There is also the following formula:

[0130] Δs1+Δs3=Δλ 1-1 +Δλ1-3 -k i (Δλ 2-1 +Δλ 2-3 )=2λ0(a f +ε f )ΔT1-2λ0k i (a f +ε f )ΔT2=2λ0(a f +ε f (k0-k) i )ΔT2;

[0131] We can obtain:

[0132]

[0133] in, The constant coefficient, It is only related to axial force, so the axial force can be decoupled:

[0134]

[0135] Where k1=k2=k3=k4 are the constants obtained earlier, Δλ i-j (i = 1, 2; j = 1, 2, 3, 4) are the measured values ​​of fiber wavelength variation. This is the constant coefficient matrix in the calibration matrix obtained through experiments.

[0136] Based on the aforementioned matrix, the mapping relationship between axial force and measured value can be obtained.

[0137] At this point, the relationship between the triaxial force and temperature acting on the neurosurgical suction tube body 1 and the reflection wavelength shift of each grating node has been calculated.

[0138] It should be noted that the aforementioned experimental calibration was performed with a known F. x F y F z Then, the corresponding wavelength and wavelength offset are measured, and the values ​​of the constant coefficient matrix can be obtained using the aforementioned formula.

[0139] The above-described embodiments are preferred embodiments of the present invention and are only used to facilitate the illustration of the present invention. They are not intended to limit the present invention in any way. Any person skilled in the art who makes local modifications or alterations to the technical content disclosed in the present invention without departing from the scope of the technical features of the present invention shall still fall within the scope of the technical features of the present invention.

Claims

1. A neurosurgical suction tube with sensing function, characterized in that, include: Neurosurgical suction tube body (1), multi-sensor fusion sensing device (2). Among them, the neurosurgical suction tube body (1) is a hollow tube with a flexible flexural structure (1-1); Among them, the multi-sensor fusion sensing device (2) includes: 4 sets of signal acquisition lines, the 4 sets of signal acquisition lines have the same structure and the 4 sets of signal acquisition lines are evenly spaced along the outer periphery of the neurosurgical suction tube body (1), and the phase angle difference between adjacent signal acquisition lines is 90°. Each group of signal acquisition lines includes: a first group of Bragg grating nodes (2-2), a second group of Bragg grating nodes (2-3), and an optical fiber (2-4); the first group of Bragg grating nodes (2-2) and the second group of Bragg grating nodes (2-3) are arranged on the optical fiber (2-4); The first group of Bragg grating nodes (2-2) corresponds to the flexural structure (1-1); The distance between the second group of Bragg grating nodes (2-3) and the end of the optical fiber is greater than the distance between the first group of Bragg grating nodes (2-2) and the end of the optical fiber; The second Bragg grating node (2-3) is used to sense lateral force; the first Bragg grating node (2-2) and the second Bragg grating node (2-3) are used together to decouple the sensing of axial force. Obtain the lateral force F x F y The method is: S100, obtain , , , ;in, This represents the center wavelength offset corresponding to the i-th Bragg grating node in the j-th group; i=2; j=1,2,3,4; S200, solve for F x F y : ， in, It is a constant matrix, and its parameters are obtained through calibration experiments and are known quantities; Obtaining longitudinal force F z The method is: S100, obtain , , , , , , , ; This represents the center wavelength offset corresponding to the i-th Bragg grating node in the j-th group; i=1,2; j=1,2,3,4; S200, solve for F z : ， in, , These represent the mapping coefficient constants related to the temperature change. This represents the coefficient of thermal expansion of a Bragg grating node; This represents the thermo-optical coefficients of the Bragg grating nodes. Indicates the initial wavelength; in, ; This indicates the distance from the left end of the neurosurgical suction tube to the point of force application. , These represent the distances from the first and second Bragg grating nodes to the holding point, respectively. in, It is a constant coefficient matrix, obtained through calibration experiments.

2. The neurosurgical suction tube with sensing function according to claim 1, characterized in that, The flexural structure (1-1) is formed by cutting a groove in the body of the neurosurgical suction tube (1).

3. The neurosurgical suction tube with sensing function according to claim 1, characterized in that, The four signal acquisition lines are named in the following order on the outer periphery of the neurosurgical suction tube body (1): the first signal acquisition line, the second signal acquisition line, the third signal acquisition line, and the fourth signal acquisition line. The method for obtaining temperature changes through four sets of signal acquisition lines is as follows: S100, obtain , , , , , , , ; in, This represents the center wavelength of the node corresponding to the i-th Bragg grating node in the j-th group; This represents the center wavelength offset corresponding to the i-th Bragg grating node in the j-th group; i=1,2; j=1,3; S200, Calculate the temperature change at the sensing area of ​​the first Bragg grating node. Temperature change at the location of the second Bragg grating node sensing area ; ； ； in, This represents the coefficient of thermal expansion of a Bragg grating node; This represents the thermo-optical coefficient of the Bragg grating node.

4. A neurosurgical suction tube with sensing function according to claim 1, characterized in that, Each of the signal acquisition lines further includes a metal electrode (2-1); a metal electrode (2-1) is provided at one end of the optical fiber (2-4); the other end of the optical fiber serves as the incident light inlet.

5. A neurosurgical suction tube with sensing function according to claim 4, characterized in that, The metal electrode (2-1) is used for excitation and signal acquisition.

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