Pipe fitting for medical instrument and medical instrument

Abstract

The embodiment of the utility model provides a pipe fitting for a medical instrument and the medical instrument, the pipe fitting for the medical instrument comprises a deflection part and a supporting part, the rigidity of the deflection part is smaller than that of the supporting part, the part, extending out of the far end of the supporting part, of the deflection part is a movable part, and the movable part is bent when being subjected to external force. The far end of the movable part points to the corresponding direction along with bending; the deflection part has elasticity, and the movable part recovers the initial state when the movable part loses the external force and is not bent.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a pipe fitting for medical devices and a medical device. Background Art

[0002] In clinical medical examination, endoscopy has been widely used as an auxiliary diagnosis method. The biopsy forceps can be inserted into the patient's body through the endoscope to examine the disease in the body, clamp the diseased tissue, and provide pathological basis for diagnosis.

[0003] Commonly used biopsy forceps are mostly hose-type biopsy forceps, including a forceps head, a spring tube, a pull cable and a handle. The overall rigidity of the spring tube of the biopsy forceps is relatively large, so that the biopsy forceps can return to its original state after moving in the channel of the endoscope, so as to move in the patient's body and clamp the diseased tissue to facilitate abutment and force application. However, this setting causes the biopsy forceps to easily slip or incomplete tissue when clamping the diseased tissue that is not perpendicular to the opening direction of the forceps head. Similarly, instruments such as hemostatic clamps, grasping forceps, and hemostatic forceps will have such problems.

[0004] Therefore, it is necessary to provide a medical device tube and a medical device, so as to facilitate the clamping of target tissue that is not perpendicular to the opening direction of the clamp head, ensure the integrity of the clamped tissue, and avoid tissue slippage. Utility Model Content

[0005] One or more embodiments of the present specification provide a tube fitting for medical devices, the tube fitting for medical devices comprising a deflection portion and a support portion, the rigidity of the deflection portion being less than that of the support portion, the portion of the deflection portion extending out from the distal end of the support portion being an active portion, the active portion being bent when subjected to an external force, and the distal end of the active portion being directed in a corresponding direction following the bending; the deflection portion being elastic, and the active portion being restored to an initial unbent state when the external force is removed.

[0006] In some embodiments, the deflection portion extends entirely out of the support portion, and a proximal end of the deflection portion is connected to a distal end of the support portion.

[0007] In some embodiments, the deflection portion and the support portion are relatively slidable. After the deflection portion and the support portion slide relative to each other, the structure of the deflection portion located on the axial outer side of the distal end of the support portion constitutes the movable portion.

[0008] In some embodiments, the deflection portion and the support portion are double-layer sleeves that can slide relative to each other.

[0009] In some embodiments, the deflection portion is sleeved within the support portion or the support portion is sleeved within the deflection portion; at least a portion of the deflection portion may extend out of the distal end of the support portion to form the movable portion.

[0010] In some embodiments, the axial length of the movable portion in the initial state is 2 to 100 mm.

[0011] In some embodiments, the angle between the direction pointed by the distal end of the movable part when the movable part is bent and the direction pointed by the distal end of the movable part in the initial state is in the range of 0 to 90°.

[0012] In some embodiments, the deflection portion includes a spring tube and / or a hollow tube.

[0013] In some embodiments, the pitch of the spring tube is 0.4-1.2 mm.

[0014] In some embodiments, the ratio of the elastic constants of the deflection portion to the support portion is in a range of 0.1 to 0.5.

[0015] In some embodiments, a rigidity ratio of the deflection portion to the support portion ranges from 0.1 to 0.8.

[0016] In some embodiments, the cross-sectional shape of the deflection portion along the axial direction of the deflection portion is a circular ring, and the area of ​​the circular ring ranges from 1.0 to 2.0 mm2; and / or the outer diameter of the circular ring ranges from 1.8 to 2.25 mm, and the inner diameter of the circular ring ranges from 1.4 to 1.8 mm.

[0017] In some embodiments, the tube further includes a connecting portion, a proximal end of the connecting portion being connected to a distal end of the deflection portion.

[0018] One or more embodiments of the present specification provide a medical device, comprising a medical device tube, a working component and an operating component as described in any of the aforementioned embodiments, wherein the distal end of the tube is connected to the working component, the proximal end of the tube is connected to the operating component, and the working component follows the distal end of the active part in the tube to point in a corresponding direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0020] Figure 1 is an exemplary block diagram of a tube for a medical device according to some embodiments of this specification;

[0021] Figure 2A is a schematic diagram of a tube for a medical device according to some embodiments of the present specification;

[0022] Figure 2B is a schematic diagram of another tube for medical devices according to some embodiments of this specification;

[0023] Figure 3A It is a schematic diagram of the use of medical device pipe fittings according to some embodiments of this specification;

[0024] Figure 3B is another schematic diagram of the use of the tube for medical devices shown in some embodiments of this specification;

[0025] Figure 3C is another schematic diagram of the use of the tube for medical devices shown in some embodiments of this specification;

[0026] Figure 3D is another schematic diagram of the use of the tube for medical devices shown in some embodiments of this specification;

[0027] Figure 4A is a schematic diagram of another tube for medical devices according to some embodiments of this specification;

[0028] Figure 4B is a schematic diagram of another tube for medical devices according to some embodiments of this specification;

[0029] Figure 5 is a schematic diagram of another tube for medical devices according to some embodiments of this specification;

[0030] Figure 6 is a schematic diagram of another tube for medical devices according to some embodiments of this specification;

[0031] Figure 7 is an exemplary block diagram of a medical device according to some embodiments of the present specification;

[0032] Figure 8 is a schematic diagram of biopsy forceps according to some embodiments of the present specification;

[0033] Fig. 9 is an exemplary flow chart of a method for operating a medical device according to some embodiments of this specification;

[0034] Fig.10 It is a schematic diagram of a method for testing the rigidity of a material according to some embodiments of the present specification. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0036] It should be understood that the "system", "device", "unit" and / or "module" used herein are a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0037] As shown in this specification and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0038] Flowcharts are used in this specification to illustrate the operations performed by the system according to the embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed precisely in order. Instead, the steps may be processed in reverse order or simultaneously. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

[0039] It is worth mentioning that the "proximal end" and "distal end" mentioned in this specification can indicate direction, which refers to the direction in which the device (for example, a tube for a medical device) enters the human body. Among them, before the corresponding device is ready to enter the human body, the end facing the operator (for example, a doctor, nurse, etc.) is the "proximal end", and the end facing the human body for treatment is the "distal end". In addition, "proximal end" and "distal end" should not be understood as indicating only the ends.

[0040] The rigidity of the pipe fittings in common medical devices used with endoscopes is relatively high, which makes it inconvenient for the medical devices to process tissues in some cases. For example, the overall rigidity of the spring tube of the biopsy forceps is relatively high. This setting causes the biopsy forceps to easily slip or incomplete tissue when clamping diseased tissue that is not perpendicular to the opening direction of the forceps head. Based on this, some embodiments of the present specification provide a pipe fitting for medical devices, which includes a deflection part and a support part with different rigidities. When processing the target tissue, the active part of the aforementioned deflection part bends, which can drive the working component located at the distal end of the active part to move, thereby changing the opening direction of the working component to better process the target tissue.

[0041] Figure 1 is an exemplary block diagram of a tube for a medical device according to some embodiments of the present specification.

[0042] The medical device pipe fitting (hereinafter referred to as the pipe fitting 100) can be provided in various medical devices 10, and the pipe fitting 100 can connect the operating component 300 and the working component 200 in the medical device 10, wherein the operating component 300 can be connected to the proximal end of the pipe fitting 100, and the working component 200 can be connected to the distal end of the pipe fitting 100. For more information about the operating component 300 and the working component 200, please refer to the relevant description below in this specification.

[0043] For example, the pipe fitting 100 may be a pipe fitting in a biopsy forceps, and the distal end and the proximal end of the pipe fitting 100 may be connected to the handle assembly and the clamp head assembly in the biopsy forceps, respectively. For another example, the pipe fitting 100 may also be a pipe fitting in a hemostatic forceps, and the distal end and the proximal end of the pipe fitting 100 may be connected to the handle assembly and the clamp assembly in the hemostatic forceps. The pipe fitting 100 may also be a pipe fitting in a hemostatic clamp, a grasping forceps, or other medical devices.

[0044] In some embodiments, Figure 1 As shown, the pipe 100 includes a deflection portion 110 and a support portion 120 .

[0045] The supporting portion 120 refers to a portion of the pipe 100 that supports the deflecting portion 110 .

[0046] In some embodiments, the support portion 120 may be made of one or more of stainless steel, spring tube, carbon steel, nickel alloy, polymer material, or other feasible materials.

[0047] In some embodiments, the support portion 120 may include a spring tube (hereinafter referred to as the first spring tube 121 for ease of explanation). For example, the support portion 120 includes only the first spring tube 121. In some embodiments, the pitch of the first spring tube 121 may be 0.4 to 1.2 mm, so as to ensure that the first spring tube 121 has appropriate elasticity, so that when passing through the endoscope channel, it deforms with the endoscope channel, and after extending out of the endoscope channel, it is easy to return to its original shape, so as to move in the patient's body. In some embodiments, the pitch of the first spring tube 121 may be 0.4 to 0.8 mm. In some embodiments, the pitch of the first spring tube 121 may be 0.4 to 0.6 mm. Preferably, the pitch of the first spring tube 121 may be 0.5 mm, so as to avoid being affected by the patient's tissue when moving in the patient's body due to excessive pitch, and at the same time, it can also ensure that after extending out of the endoscope channel, the first spring tube 121 can return to its original shape for easy movement.

[0048] In some embodiments, the support portion 120 may include an inner hollow sheath 122. Figure 2A As shown, the support part 120 may include a first spring tube 121 and a sheath tube 122, wherein the sheath tube 122 may be sleeved outside the first spring tube 121. The support part 120 may also include other structures. The support part 120 may also include a first control element, and the first control element may control the support part 120 to move along its axial direction. For example, the first control element may be a slider 123, Figure 4A The support portion 120 shown may further include a sheath tube 122 and a slider 123, and the slider 123 may be connected to the distal end of the sheath tube 122. The operator may control the sheath tube 122 to slide along the axial direction of the pipe 100 through the slider 123.

[0049] The deflection portion 110 refers to a portion of the pipe 100 that can be deflected to adjust the opening direction of the working assembly 200. The opening direction of the working assembly 200 may refer to a direction along the central axis of the opening angle formed by at least two working components in the working assembly 200 toward the distal end of the working assembly 200. For more information about the working components, please refer to the relevant description below in this specification.

[0050] In some embodiments, the deflection portion 110 may be made of one or more of stainless steel, spring tube, carbon steel, nickel alloy, polymer material, or other feasible materials.

[0051] In some embodiments, the cross-sectional shape of the deflection portion 110 along the axial direction of the deflection portion 110 may be a circular ring.

[0052] In some embodiments, the area of ​​the aforementioned ring ranges from 1.0 to 2.0 mm 2 In some embodiments, the area of ​​the ring ranges from 1.0 to 1.8 mm 2 .

[0053] In some embodiments, the outer diameter of the aforementioned ring ranges from 1.8 to 2.25 mm, and the inner diameter of the aforementioned ring ranges from 1.4 to 1.8 mm. In some embodiments, the outer diameter of the ring can range from 1.9 to 2.1 mm, and the inner diameter of the ring can range from 1.5 to 1.7 mm. In some embodiments, in some embodiments, the outer diameter of the ring can range from 1.95 to 2.05 mm, and the inner diameter of the ring can range from 1.55 to 1.65 mm.

[0054] By limiting various parameters of the cross section of the deflection part 110 along the axial direction of the deflection part 110, the rigidity of the deflection part 110 can be adjusted to be smaller than the rigidity of the support part 120 to ensure the balance between the rigidity and load capacity of the deflection part 110, so that the active part 1101 in the deflection part 110 can bend without plastic deformation or fracture.

[0055] In some embodiments, the deflection unit 110 may include a spring tube (hereinafter referred to as the second spring tube 111 for ease of description). Figure 2A The deflection unit 110 shown comprises only the second spring tube 111 .

[0056] In some embodiments, the pitch of the second spring tube 111 is 0.4 to 1.2 mm. In some embodiments, the pitch of the second spring tube 111 can be 0.4 to 0.6 mm. In some embodiments, the pitch of the second spring tube 111 can be 0.4 to 0.5 mm. Preferably, the pitch of the second spring tube 111 can be 0.4 mm to avoid bending under the influence of the reaction force at the distal end when the pitch is too small, and can also avoid being affected by the patient's tissue when the pitch is too large and moving in the patient's body. At the same time, it can also ensure that the second spring tube 111 can be restored to its original state after extending the endoscope channel for easy movement. Under the same conditions (such as structure, cross-section, etc.), the larger the pitch of the spring tube, the smaller the rigidity. Therefore, the pitch of the second spring tube 111 can be set to be greater than the pitch of the first spring tube 121 to achieve the rigidity difference between the two. For example, the pitch of the second spring tube 111 can be 0.45 mm, and the pitch of the first spring tube 121 can be 0.4 mm.

[0057] In some embodiments, the deflection unit 110 may further include other structures. For example, the deflection unit 110 may further include and only include a hollow tube. For another example, the deflection unit 110 may include a second spring tube 111 and a hollow tube.

[0058] In some embodiments, the deflection portion 110 may include an active portion 1101, which is a portion of the deflection portion 110 extending from the distal end of the support portion 120. For more information about this embodiment, please refer to the relevant description below in this specification.

[0059] In some embodiments, the deflection portion 110 may extend completely out of the distal end of the support portion 120. Accordingly, the deflection portion 110 may include and only include the movable portion 1101. Figure 2A As shown, the deflection portion 110 can be completely extended out of the distal end of the support portion 120, and the deflection portion 110 is a movable portion 1101. For more details about this embodiment, please refer to the relevant description below in this specification.

[0060] In some embodiments, the deflection unit 110 may also at least partially extend out of the distal end of the support unit 120. Correspondingly, when the deflection unit 110 partially extends out of the distal end of the support unit 120, in addition to the active portion 1101 extending out of the distal end of the support unit 120, the deflection unit 110 may also include an inactive portion that does not extend out of the distal end of the support unit 120. For more information about this embodiment, please refer to the relevant description below in this specification.

[0061] In some embodiments, the axial length of the movable portion 1101 in the initial state when it is not bent is 2 to 100 mm. In some embodiments, the axial length of the movable portion 1101 in the initial state when it is not bent is 5 to 50 mm. In some embodiments, the axial length of the movable portion 1101 in the initial state when it is not bent is 10 to 30 mm. Preferably, the axial length of the movable portion 1101 in the initial state when it is not bent is 10 mm. It can be understood that if the axial length of the movable portion 1101 in the initial state when it is not bent is too small, it is difficult to bend, or the bending radius is too small, and it is difficult to drive the working component 200 to move; when the axial length of the movable portion 1101 in the initial state when it is not bent is too large, it is difficult to control the bending of the movable portion 1101, and the size of the movable portion 1101 extending out of the endoscope channel may be too long, resulting in a poor field of view. By limiting the axial length of the movable portion 1101 in the initial state when it is not bent, it can be guaranteed that it can be observed through the endoscope during use, which is convenient for controlling the bending process of the movable portion 1101.

[0062] In some embodiments, the movable portion 1101 may bend when subjected to an external force, and the distal end of the movable portion 1101 may follow the bending and point to a corresponding direction. The external force may include a force acting along the axial direction of the support portion 120 toward the distal end of the pipe 100.

[0063] like Figure 3AAs shown, the distal end of the tube 100 can be connected to the working component 200, and the working component 200 can abut against the target tissue P. The operator can continuously apply a force F1 to the tube 100 along the axial direction of the support portion 120 toward the distal end of the support portion 120. The aforementioned force F1 drives the tube 100 to move forward along its axial direction. However, since the working component 200 has abutted against the target tissue P, the tube 100 can no longer move forward. Therefore, the target tissue P exerts a reaction force on the tube 100. Under the continuous action of the force F1 and the reaction force, the active portion 1101 bends, and the distal end of the active portion 1101 can follow the bending to point to the corresponding direction. The working component 200 disposed at the distal end of the active portion 1101 can move with the distal end of the active portion 1101, thereby causing the opening direction of the working component 200 to change. For example, the following can be obtained: Figure 3B The movable part 1101 and the working component 200 are shown, wherein Figure 3B The active portion 1101 shown is compared to Figure 3A The active portion 1101 is shown to be bent. Figure 3B The working assembly 200 shown is compared to Figure 3A The opening direction of the working component 200 shown has changed. More descriptions about the target tissue can be found below in this specification.

[0064] In some embodiments, the angle between the direction pointed by the distal end of the movable portion 1101 when the movable portion 1101 is bent and the direction pointed by the distal end of the movable portion 1101 in the initial state is in the range of 0 to 90 degrees. Figure 3B As shown, D1 is the direction in which the distal end of the active part 1101 points in the initial state, and D2 is the direction in which the distal end of the active part 1101 points when the active part 1101 is bent. The angle range α between D1 and D2 is 0 to 90°, thereby ensuring that the bending angle of the active part 1101 is large enough so that the working component 200 located at the distal end of the active part 1101 can process the target tissue, and preventing the active part 1101 from bending too large an angle, causing the working component 200 located at the distal end of the active part 1101 to slip, and when the bending angle is too large, it is inconvenient to control the working component 200 through the operating component 300.

[0065] In some embodiments, the rigidity of the deflection portion 110 is less than the rigidity of the support portion 120, thereby ensuring that when the active portion 1101 in the deflection portion 110 is bent by force, the support portion 120 does not deform or the deformation is small, so that the support portion 120 can continue to support the active portion 1101, so that the active portion 1101 is continuously subjected to the force along the axial direction of the support portion 120 toward the distal end of the support portion 120, thereby ensuring the normal bending of the active portion 1101.

[0066] It is worth noting that the rigidity of each component described in this specification can be determined by a variety of methods. For example, tensile test method, compression test method, bending test method, torsion test method, etc. For another example, Fig.10 The method shown in the figure is used to test and determine the rigidity of each rigid part. Fig.10 As shown, a certain material 31 can be placed on a support member 33, and a force-applying member 34 can apply a vertical downward force F toward the center position of the material 31. The material 31 is deformed under the action of the force F to obtain a deformed material 32, wherein the deformation magnitude of the material 31 and the deformed material 32 along the direction of the force F is a displacement H, and the rigidity of the aforementioned material 31 can be calculated by the formula K=F / H.

[0067] In some embodiments, the rigidity of the deflection portion 110 may be made smaller than the rigidity of the support portion 120 through one or more configurations.

[0068] In some embodiments, the deflection portion 110 and the support portion 120 may have different rigidities due to different hardnesses. For example, the deflection portion 110 and the support portion 120 may be made of different materials, wherein the hardness of the material used for the deflection portion 110 is less than the hardness of the material used for the support portion 120, so that the rigidity of the deflection portion 110 is less than the rigidity of the support portion 120. For another example, the deflection portion 110 and the support portion 120 may be made of the same material, and the support portion 120 may be hardened (such as one or more of heat treatment, work hardening, alloying, and grain refinement) to improve the hardness of the support portion 120; or the deflection portion 110 may be softened (such as one or more of electrolysis and passivation).

[0069] In some embodiments, the deflection portion 110 and the support portion 120 may have a difference in rigidity due to different parameter settings. For example, the deflection portion 110 is a second spring tube 111, and the support portion 120 is a first spring tube 121. The cross-sectional radius of the spring in the second spring tube 111 is smaller than the cross-sectional radius of the spring in the first spring tube 121, so that there is a difference in rigidity between the deflection portion 110 and the support portion 120. For another example, the cross-sections of the springs of the second spring tube 111 and the first spring tube 121 along the axial direction of the spring are different. For example, under the same other structures, the second spring tube 111 can be made of round wire, and the first spring tube 121 can be made of flat wire, so that there is a difference in rigidity between the deflection portion 110 and the support portion 120.

[0070] In some embodiments, the deflection part 110 and the support part 120 may also have different structures to produce a difference in rigidity. For example, the deflection part 110 is a second spring tube 111, and the support part 120 is a first spring tube 121. The two spring tubes have the same parameter settings. The support part 120 also includes a sheath tube 122, and the sheath tube 122 can be sleeved outside the first spring tube 121, thereby increasing the rigidity of the support part 120. For another example, the support part 120 can also be plastic-coated to increase the rigidity of the support part 120.

[0071] It is worth noting that the deflection portion 110 and the support portion 120 may have different rigidities due to various feasible configurations, which is not limited here.

[0072] In some embodiments, the rigidity ratio of the deflection portion 110 to the support portion 120 is in the range of 0.1 to 0.8. In some embodiments, the rigidity ratio of the deflection portion 110 to the support portion 120 is in the range of 0.2 to 0.7. In some embodiments, the rigidity ratio of the deflection portion 110 to the support portion 120 is in the range of 0.3 to 0.6. Preferably, the rigidity ratio of the deflection portion 110 to the support portion 120 is in the range of 0.5. By limiting the rigidity ratio of the deflection portion 110 to the support portion 120, it is ensured that when subjected to external force, the movable portion 1101 can bend, thereby driving the working assembly 200 disposed at the distal end of the movable portion 1101 to move, and the support portion 120 does not deform or the deformation is small, so that the support portion 120 continues to support the movable portion 1101.

[0073] In some embodiments, the rigidity of the deflection unit 110 may range from 0.03 to 0.33 N / mm. In some embodiments, the rigidity of the deflection unit 110 may range from 0.03 to 0.20 N / mm. In some embodiments, the rigidity of the deflection unit 110 may range from 0.03 to 0.10 N / mm. Preferably, the rigidity of the deflection unit 110 may be 0.03 N / mm. By limiting the rigidity of the deflection unit 110, it is possible to avoid the situation where the rigidity is too large, the force driving the active part 1101 in the deflection unit 110 to bend is greater than the reaction force of the target tissue on it, resulting in the inability of the active part 1101 to bend, and the working component 200 at the distal end of the active part 1101 to slip and deviate from the target tissue; it is also possible to avoid the situation where the rigidity is too small, and unexpected bending occurs under the gravity at the distal end of the pipe 100 before the pipe 100 approaches the target tissue, which may cause the working component 200 connected to the distal end of the pipe 100 to be unable to effectively align with the target tissue.

[0074] In some embodiments, the deflection unit 110 may include at least two sub-deflection units, and the rigidities of the at least two sub-deflection units are different, but the rigidities of the at least two sub-deflection units are both less than the rigidity of the support unit 120. It is understandable that when subjected to external force, the part with the smallest rigidity in the active part 1101 may bend first. By setting the deflection unit 110 to have at least two sub-deflection units with different rigidities, the operator can clearly know the position where the active part 1101 bends first, and the operator's controllability of the bending of the active part 1101 is improved, so that the operator can adjust the position where the active part 1101 bends first as needed, so that the working component 200 can more accurately process the target tissue.

[0075] In some embodiments, the at least two sub-deflection parts are of different colors so that the operator can observe and control the bending process of the movable part 1101 through an endoscope.

[0076] In some embodiments, the stiffness difference between the at least two sub-deflection parts ranges from 0.01 to 0.15 N / mm, thereby ensuring that the difference between the at least two sub-deflection parts is large enough to identify the part of the active part 1101 that bends first.

[0077] In some embodiments, the rigidity of the support portion 120 may range from 0.05 to 1 N / mm. In some embodiments, the rigidity of the support portion 120 may range from 0.1 to 0.8 N / mm. In some embodiments, the rigidity of the support portion 120 may range from 0.1 to 0.5 N / mm. Preferably, the rigidity of the support portion 120 may be 0.1 N / mm. By limiting the rigidity of the support portion 120, it is possible to avoid the rigidity being too small and the support portion 120 being unable to return to its original state after passing through the curved portion in the endoscope channel. It is also possible to avoid the rigidity being too large and causing the pipe 100 to have excessive resistance when passing through the endoscope channel, or bending when passing through an area with a small bending radius in the endoscope channel.

[0078] In some embodiments, the deflection portion 110 is elastic, and the movable portion 1101 returns to its original unbent state when no external force is applied, so that the tube 100 can be removed from the patient's body through the endoscope channel.

[0079] like Figure 3C As shown, the distal end of the pipe 100 is connected to the working assembly 200, and the working assembly 200 abuts against the target tissue P. The operator can apply a force F2 to the pipe 100 along the axial direction of the support portion 120 toward the distal end of the support portion 120. Figure 3C The movable portion 1101 shown is bent. Since the movable portion 1101 is elastic, the bent movable portion 1101 has an elastic restoring force. The force F2 can offset the elastic restoring force, so that Figure 3C The pipe 100 shown in the figure remains in a stationary state; when the active portion 1101 loses the force F2, the active portion 1101 can be restored to the position as shown in the figure under the action of the elastic restoring force. Figure 3D The initial state when not bent is shown.

[0080] In some embodiments, the ratio of the elastic constants of the deflection portion 110 to the support portion 120 is in the range of 0.1 to 0.5. In some embodiments, the ratio of the elastic constants of the deflection portion 110 to the support portion 120 is in the range of 0.2 to 0.5. In some embodiments, the ratio of the elastic constants of the deflection portion 110 to the support portion 120 is in the range of 0.25 to 0.35. By limiting the ratio of the elastic constants of the deflection portion 110 to the support portion 120, the force applied to the pipe 100 can be buffered in multiple stages, thereby ensuring the stability of the operation of the working assembly 200 disposed at the distal end of the pipe 100.

[0081] It is worth noting that the elastic constants described in this specification can be obtained by testing the corresponding materials using one or more of a spring dynamometer, a resistance strain method, a bending deflection method, a nanoindentation test or other feasible testing methods.

[0082] In some embodiments, the elastic constant of the deflection unit 110 may range from 0.3 to 3.5 N / mm. In some embodiments, the elastic constant of the deflection unit 110 may range from 0.5 to 3 N / mm. In some embodiments, the elastic constant of the deflection unit 110 may range from 1 to 3.5 N / mm. By limiting the elastic constant range of the deflection unit 110, it is possible to avoid the elastic restoring force of the active part 1101 being too large, resulting in violent movement to restore the initial state, which may easily lead to contact with other tissues of the patient, and it is also possible to avoid the elastic restoring force of the active part 1101 being too small, resulting in the active part 1101 being unable to return to its original state.

[0083] In some embodiments, the elastic constant of the support portion 120 may range from 1 to 20 N / mm. In some embodiments, the elastic constant of the support portion 120 may range from 3 to 15 N / mm. In some embodiments, the elastic constant of the support portion 120 may range from 5 to 15 N / mm. By limiting the elastic constant range of the support portion 120, it is possible to avoid the elastic restoring force of the support portion 120 being too large, resulting in excessive resistance when the pipe 100 moves in the endoscope channel, and it is also possible to avoid the elastic restoring force of the support portion 120 being too small, resulting in the support portion 120 being unable to return to its original state after extending out of the endoscope channel.

[0084] In some embodiments, the compressive strength of the deflection portion 110 and the support portion 120 may be 26.5 to 80 MPa. In some embodiments, the compressive strength of the deflection portion 110 and the support portion 120 may be 35 to 70 MPa. In some embodiments, the compressive strength of the deflection portion 110 and the support portion 120 may be 50 to 70 MPa. Preferably, the compressive strength of the deflection portion 110 and the support portion 120 is 64 MPa. The compressive strengths of the deflection portion 110 and the support portion 120 may be the same or different. By limiting the compressive strength of the deflection part 110 and the support part 120, it can be ensured that when the operating component 300 controls the working component 200, the deflection part 110 and the support part 120 will not be plastically deformed when subjected to pressure. If the compressive strength of the deflection part 110 and the support part 120 is too small, the compressive strength of the deflection part 110 and the support part 120 will be weak, and when the operating component 300 controls the working component 200, the deflection part 110 may recover prematurely, resulting in failure to treat the target tissue; if the compressive strength of the deflection part 110 and the support part 120 is too large, the strength of the tube 100 will increase, which will cause the tube 100 to be overall harder, making it difficult to move in the endoscope channel, and easily damaging the endoscope channel or the tube 100 itself during movement.

[0085] In some embodiments, the pipe 100 may include only the deflection portion 110 and the support portion 120. When the pipe 100 includes only the deflection portion 110 and the support portion 120, the deflection portion 110 may be located at the distal end of the pipe 100. When the pipe 100 is configured as the pipe 100 in the medical device 10, the distal end of the deflection portion 110 may be connected to the working component 200. For example, Figure 2A As shown, the deflection portion 110 is located at the distal end of the pipe 100, the proximal end of the deflection portion 110 can be connected to the distal end of the support portion 120, and the distal end of the deflection portion 110 can be connected to the working assembly 200. For another example, Figure 4B As shown, the deflection portion 110 and the support portion 120 may both be located at the distal end of the pipe 100 , the support portion 120 may be sleeved outside the deflection portion 110 , and the distal end of the deflection portion 110 may be connected to the working assembly 200 .

[0086] In some embodiments, Figure 1 As shown, the pipe 100 may further include a connecting portion 130. Figure 2BAs shown, the proximal end of the connecting portion 130 can be connected to the distal end of the deflection portion 110, and the distal end of the connecting portion 130 can be connected to the working component 200. The connecting portion 130 can move with the distal end of the movable part 1101 and drive the working component 200 to move. The connecting portion 130 can be made of one or more of stainless steel, spring tube, carbon steel, nickel alloy, polymer material or other feasible materials. The connecting portion 130 can be set to a variety of shapes, for example, the connecting portion 130 can be set to a spring. For another example, the connecting portion 130 can also be set to a hollow tube. The connecting portion 130 can be connected to the deflection portion 110 in a variety of ways. For example, the connecting portion 130 can be integrally formed with the deflection portion 110. For another example, the connecting portion 130 can be connected to the deflection portion 110 by welding, gluing, etc. The structure and various parameters of the connecting portion 130 and the support portion 120 can be the same or different.

[0087] In some embodiments, the axial dimension of the connecting portion 130 ranges from (0 mm to 8 mm). Preferably, the axial dimension of the connecting portion 130 may be 2 mm. By limiting the axial dimension of the connecting portion 130 , it is possible to avoid the working component 200 being too far away from the movable portion 1101 , thereby preventing the working component 200 from following the distal movement of the movable portion 1101 .

[0088] In some embodiments, the rigidity of the connection portion 130 may be greater than the rigidity of the deflection portion 110 , thereby improving the connection strength between the pipe 100 and the working assembly 200 and ensuring the stability of the working assembly 200 during use.

[0089] In some embodiments, the pipe 100 may further include other structures, for example, the pipe 100 may further include an adjusting portion 140. For more information about the adjusting portion 140, please refer to the relevant description below in this specification.

[0090] For another example, the pipe 100 may also include a traction member (for example, a traction rope). The traction member may pass through the pipe 100, the distal end of the traction member may be connected to the working component 200, and the proximal end of the traction member may be connected to the operating component 300. The operator may control the traction line through the operating component 300, thereby achieving control over the working component 200. In some embodiments, when the working component 200 is controlled by the aforementioned traction member, the force required to be applied to the working component 200 may range from 0N to 5N; when the movable part 1101 is controlled to bend, the force required to be applied toward the distal end of the pipe 100 may range from 5N to 10N, so as to ensure that when the working component 200 is controlled by the traction member, the bending of the movable part 1101 will not be affected, and the stability of the pipe 100 during use can be ensured, and the excessive force required to be applied when controlling the working component 200 is avoided, resulting in the working component 200 being tight and unable to effectively treat the target tissue. At the same time, it can also avoid the excessive force required to be applied toward the distal end of the pipe 100 when controlling the bending of the movable part 1101, resulting in the pipe 100 being bent or unable to pass through the endoscope channel. Preferably, when the working component 200 is controlled by the aforementioned traction member, the force required to be applied to the working component 200 is 3N; and the force required to be applied when controlling the bending of the movable part 1101 is 7N.

[0091] Some embodiments of the present specification provide a deflection portion 110 and a support portion 120 with different rigidities in the tube 100, so that when the medical device 10 is used, the direction in which the distal end of the tube 100 is adjusted, so that the working component 200 located at the distal end of the tube 100 can better point to the target tissue, making it easier for the working component 200 to process the target tissue.

[0092] The specific structural arrangement of the deflection part and the support part will be described below in this specification.

[0093] In some embodiments, the deflection portion 110 and the support portion 120 may be arranged in a variety of ways to implement the pipe 100 .

[0094] In some embodiments, Figure 2A as well as Figure 2B As shown, the deflection portion 110 can be completely extended out of the support portion 120, and the proximal end of the deflection portion 110 is connected to the distal end of the support portion 120. At this time, the relative position of the deflection portion 110 and the support portion 120 will not change.

[0095] The proximal end of the deflection portion 110 can be connected to the distal end of the support portion 120 in a variety of ways. For example, the proximal end of the deflection portion 110 can be integrally formed with the distal end of the support portion 120. For another example, the proximal end of the deflection portion 110 can be welded, glued, etc. to the distal end of the support portion 120.

[0096] In some embodiments of the present specification, the deflection portion 110 is configured to completely extend out of the support portion 120, and the proximal end of the deflection portion 110 is connected to the distal end of the support portion 120, so that the structure of the pipe fitting 100 can be simpler, which is convenient for operators to operate and avoids excessively high costs of the pipe fitting 100.

[0097] In some embodiments, the deflection portion 110 and the support portion 120 can slide relative to each other. After the deflection portion 110 and the support portion 120 slide relative to each other, the structure of the deflection portion 110 located on the axial outer side of the distal end of the support portion 120 constitutes the movable portion 1101, thereby making the pipe fitting 100 more flexible and facilitating the operator to adjust the length of the movable portion 1101 as needed.

[0098] For example, when the opening direction of the working component 200 located at the distal end of the tube 100 needs to be adjusted to a smaller angle, the length of the movable part 1101 can be shorter accordingly; when the opening direction of the working component 200 located at the distal end of the tube 100 needs to be adjusted to a larger angle, the length of the movable part 1101 can be longer accordingly, thereby ensuring that the working component 200 can process the target tissue more accurately.

[0099] For another example, when the deflection unit 110 includes at least two sub-deflection units with different rigidities, by controlling the movable portion 1101 , the operator can more flexibly control the bending shape and bending position of the movable portion 1101 according to needs.

[0100] In some embodiments, a slide rail may be provided between the deflection unit 110 and the support unit 120, and the operator may control the deflection unit 110 or the support unit 120 to slide, thereby achieving relative sliding of the deflection unit 110 and the support unit 120. For example, the deflection unit 110 is a second spring 111, and the support unit 120 is a sheath tube 122. The outer side of the sheath tube 122 is provided with a slide rail, and the second spring 111 may be provided in the slide rail and may slide along the slide rail, thereby achieving relative sliding of the deflection unit 110 and the support unit 120.

[0101] In some embodiments, the deflection portion 110 and the support portion 120 are double-layer sleeves that can slide relative to each other. By setting the deflection portion 110 and the support portion 120 as double-layer sleeves that can slide relative to each other, the radial volume of the tube 100 can be reduced, making it easier to move in the endoscope channel and the patient's body.

[0102] In some embodiments, the deflection portion 110 is sleeved in the support portion 120. Figure 4A as well as Figure 4BAs shown, the deflection portion 110 may include a second spring 111, and the support portion 120 may include a sheath 122 and a slider 123, wherein the slider 123 may be disposed at the distal end of the sheath 122, and the second spring 111 is sleeved in the sheath 122, and the operator may control the axial movement of the sheath 122 through the slider 123, thereby realizing the relative sliding of the deflection portion 110 and the support portion 120.

[0103] In some embodiments, Figure 4B As shown, the deflection portion 110 can be completely placed in the support portion 120. Exemplarily, when the tube 100 moves in the endoscope channel and the patient's body, the deflection portion 110 can be completely placed in the support portion 120 to prevent the deflection portion 110 from unexpectedly bending during the movement of the tube 100.

[0104] In some embodiments, Figure 4A As shown, at least part of the deflection portion 110 can extend out of the distal end of the support portion 120 to form an active portion 1101, and the part of the deflection portion 110 that does not extend out of the distal end of the support portion 120 is an inactive portion. When the working assembly 200 at the distal end of the tube 100 abuts against the target tissue, the axial movement of the sheath 122 can cause part or all of the deflection portion 110 to extend out of the support portion 120, and the part of the deflection portion 110 that extends out of the distal end of the support portion 120 forms the active portion 1101.

[0105] In some embodiments of the present specification, the deflection portion 110 is sleeved in the support portion 120, and the deflection portion 110 and the support portion 120 can slide relative to each other, so that the tube 100 can be easily moved in the endoscope channel and the patient's body. At the same time, the operator can also adjust the length of the movable part 1101 as needed, so as to more flexibly control the tube 100 and the working component 200 arranged at the far end of the tube 100.

[0106] In some embodiments, the support portion 120 is sleeved in the deflection portion 110. Figure 5 As shown, the deflection portion 110 may include a second spring 111, and the support portion 120 may include a sheath 122 and a slider 123, wherein the slider 123 may be disposed at the distal end of the sheath 122, and the sheath 122 is sleeved in the second spring 111, and the operator may control the axial movement of the sheath 122 through the slider 123, thereby realizing the relative sliding of the deflection portion 110 and the support portion 120.

[0107] In some embodiments, the deflection portion 110 may not extend beyond the distal end of the support portion 120. For example, when the tube 100 moves in the endoscope channel and the patient's body, the deflection portion 110 may not extend beyond the distal end of the support portion 120, thereby preventing the deflection portion 110 from unexpectedly bending during the movement of the tube 100.

[0108] In some embodiments, at least a portion of the deflection portion 110 can extend out of the distal end of the support portion 120 to form an active portion 1101, and the portion of the deflection portion 110 that does not extend out of the distal end of the support portion 120 is an inactive portion. When the working assembly 200 at the distal end of the tube 100 abuts against the target tissue, the axial movement of the sheath 122 can cause part or all of the deflection portion 110 to extend out of the support portion 120, and the portion of the deflection portion 110 that extends out of the distal end of the support portion 120 forms the active portion 1101.

[0109] In some embodiments of the present specification, the support portion 120 is sleeved in the deflection portion 110, and the deflection portion 110 and the support portion 120 can slide relative to each other, so that the tube 100 can be easily moved in the endoscope channel and the patient's body. At the same time, the operator can also adjust the length of the movable part 1101 as needed, so as to more flexibly control the tube 100 and the working component 200 arranged at the far end of the tube 100.

[0110] In some embodiments, the pipe 100 may further include an adjusting portion 140, one of the supporting portion 120 and the adjusting portion 140 is sleeved inside the deflecting portion 110, and the other is sleeved outside the deflecting portion 110, the deflecting portion 110, the supporting portion 120 and the adjusting portion 140 are relatively slidable, and the bending condition of the movable portion 1101 in the pipe 100 can be adjusted by setting the distal end of the adjusting portion 140 between the distal end of the movable portion 1101 and the proximal end of the movable portion 1101. For example, before or during the bending of the movable portion 1101, the position of the distal end of the adjusting portion 140 in the movable portion 1101 can be adjusted, and the bending condition of the corresponding section in the movable portion 1101 in the pipe 100 can be adjusted, so that the operator can more flexibly adjust the bending condition of the movable portion 1101 as needed.

[0111] In some embodiments, the rigidity of the adjusting portion 140 is greater than the rigidity of the deflecting portion 110, and the rigidity of the adjusting portion 140 is less than the rigidity of the supporting portion 120. By limiting the rigidity relationship among the adjusting portion 140, the deflecting portion 110, and the supporting portion 120, effective adjustment can be performed by the adjusting portion 140.

[0112] In some embodiments, the rigidity range of the adjustment part 140 can be 0.04~0.6N / mm. By limiting the rigidity range of the adjustment part 140, it can be avoided that the rigidity of the adjustment part 140 is too large, resulting in the inability to bend the adjusted active part 1101, and it can be avoided that the rigidity of the adjustment part 140 is too small, resulting in the inability of the adjustment part 140 to adjust the bending of the active part 1101.

[0113] In some embodiments, the adjusting portion 140 may be made of one or more of stainless steel, spring tube, carbon steel, nickel alloy, polymer material or other feasible materials. The adjusting portion 140 may include but is not limited to one or more of spring tube, hollow tube and the like.

[0114] like Figure 6 As shown, the adjusting portion 140 can be sleeved in the deflection portion 110, and the deflection portion 110 can be sleeved in the support portion 120. The deflection portion 110, the support portion 120 and the adjusting portion 140 can slide relative to each other. At least a portion of the deflection portion 110 can extend out of the distal end of the support portion 120 to form a movable portion 1101. The distal end of the adjusting portion 140 can be set between the distal end of the movable portion 1101 and the proximal end of the movable portion 1101, so as to adjust the corresponding section in the movable portion 1101 in the pipe 100.

[0115] In some embodiments, the support portion 120 may include a first control element, which can control the support portion 120 to move axially along the support portion 120. The adjustment portion 140 may include a second control element, which can control the adjustment portion 140 to move axially along the adjustment portion 140. The first control element and the second control element can realize relative sliding of the deflection portion 110, the support portion 120 and the adjustment portion 140.

[0116] For example, the first control element and the second control element may be sliders, which may be disposed at the proximal ends of the support portion 120 and the adjustment portion 140 , respectively, and the operator may control the movement of the support portion 120 and the adjustment portion 140 through the sliders.

[0117] In some embodiments, the first control element may be a first control rope, which may be connected to the proximal end of the support portion 120, the second control element may be a second control rope, which may be connected to the proximal end of the adjustment portion 140, and the pipe 100 may further include a third control element, the distal ends of the first control rope and the distal ends of the second control rope may be connected to the third control element, and the third control element is configured to first control the first control rope to control the support portion 120 to move axially, and then synchronously control the first control rope and the second control rope to control the support portion 120 and the adjustment portion 140 to move axially, thereby achieving synchronous control of the support portion 120 and the adjustment portion 140, which is convenient for operators to manipulate the pipe 100. For example, the third control element may be a slider, and when the first control element slides, the first control rope is first tightened, and at this time, the continued sliding of the slider will drive the support portion 120 to move axially, and the continued sliding of the slider can drive the second control rope to tighten, and at this time, the continued sliding of the slider will synchronously drive the support portion 120 and the adjustment portion 140 to move axially.

[0118] The following description of the medical device 10 provided with the tube 100 will be described. Figure 7 is an exemplary block diagram of a medical device 10 according to some embodiments of the present specification. Figure 8 is a schematic diagram of biopsy forceps according to some embodiments of the present specification.

[0119] The medical device 10 can be used to treat a target tissue. The medical device 10 may include, but is not limited to, a biopsy forceps, a hemostatic clamp, a grasping forceps, a thermal biopsy device, a hemostatic forceps, etc. The aforementioned target tissue is the tissue in the patient's body that needs to be treated. For example, when the medical device 10 is a biopsy forceps, the aforementioned target tissue is the tissue that needs to be sampled.

[0120] In some embodiments, Figure 7 As shown, the medical device 10 may include a pipe 100, a working component 200 and an operating component 300, wherein the pipe 100 may be the pipe described in any of the previous embodiments of the present specification.

[0121] The working component 200 may be a component for processing the target tissue. In some embodiments, the working component 200 may include but is not limited to a forceps head component, a clamp component, a grasping forceps component, a thermal biopsy component, an electrocoagulation forceps component, and the like.

[0122] The working assembly 200 may include at least two working parts, and the working parts are used to treat the target tissue. The use of the medical device 10 is different, and the use and structure of the working parts are also different. For example, Figure 8 As shown, when the medical device 10 is a biopsy forceps, the working component 200 may be a forceps head component, and at least two working components may include two forceps cups 210, and the two forceps cups 210 may clamp the target tissue. The working component 200 may also include other components. For example, Figure 8 The pliers assembly shown may also include a cup 220, a pin 230, and a connecting piece ( Figure 8 The two clamp cups 210 can be rotatably arranged on the cup seat 220 through the pin 230, and the two clamp cups 210 can be connected by a connecting piece, which can be connected to the distal end of the traction member, and the working assembly 200 can rotate relative to the pipe 100. For more information about the traction member, please refer to the relevant description in the previous text of this specification.

[0123] The operating component 300 can be used to manipulate the working component 200 .

[0124] like Figure 8As shown, the operating assembly may include a sliding handle 310 and a handle housing 320 . The sliding handle 310 may be sleeved on the handle housing 320 . The sliding handle 310 may be connected to the proximal end of the traction member. The operator may control the sliding handle 310 to slide along the handle housing 320 .

[0125] In some embodiments, the operating assembly 300 may also be provided with a force detection member, which can detect the magnitude of the external force applied when the medical device 10 is pushed forward (for example, the aforementioned forces F1 and F2). In some embodiments, the force required to be applied by the medical device 10 at each stage of treating the target tissue can be determined through surgical planning, and the magnitude of the external force can be detected by the force detection member, which can improve the accuracy of force application, avoid excessive external force causing tissue damage to the patient, or the working assembly 200 slipping, and avoid too small external force applied to drive the active part 1101 to bend.

[0126] In some embodiments, the distal end of the pipe 100 is connected to the working assembly 200, and the proximal end of the pipe 100 is connected to the operating assembly 300. Figure 8 As shown, the pipe 100 may include a deflection portion 110 and a support portion 120 , the proximal end of the deflection portion 110 may be connected to the distal end of the support portion 120 , the proximal end of the deflection portion 110 may be connected to the cup holder 220 , and the proximal end of the support portion 120 may be connected to the handle housing 320 .

[0127] In some embodiments, when subjected to external force, the working component 200 located at the distal end of the movable part 1101 follows the distal end of the movable part 1101 to point to the corresponding direction. For example, the working component 200 can be directly connected to the movable part 1101, and when subjected to external force, the working component 200 follows the distal end of the movable part 1101 to point to the corresponding direction. For another example, the working component 200 can be connected to the movable part 1101 through the connecting portion 130, and when subjected to external force, the connecting portion 130 follows the distal end of the movable part 1101 to point to the corresponding direction, and when the connecting portion 130 moves, it synchronously drives the connected working component 200 to point to the corresponding direction.

[0128] In some embodiments of the present specification, a medical device 10 is provided with a tube 100, wherein the tube 100 includes a deflection portion 110 and a support portion 120 with different rigidities, so that when the medical device 10 is used, the direction in which the distal end of the tube 100 is pointed can be adjusted, so that the working component 200 located at the distal end of the tube 100 can better point to the target tissue, thereby facilitating the working component 200 to process the target tissue.

[0129] The following description of the method for operating the medical device 10 will be described.

[0130] Fig. 9 is an exemplary flow chart of the operation method of the medical device according to some embodiments of this specification. Fig. 9 As shown, process 20 may include the following steps:

[0131] S1, controlling at least two working parts in the working assembly to open, and making one of the working parts abut against the target tissue.

[0132] An operator or a processor for controlling the medical device 10 can control the tube 100 and the working component 200 in the medical device 10 to move through the endoscope channel to the target tissue or the area around the target tissue. During this process, at least two working parts in the working component 200 (for example, the forceps cup 210) can be closed to reduce the volume of the tube 100 and the working component 200 to facilitate movement in the endoscope channel or the patient's body.

[0133] like Figure 3A As shown, at least two working parts may be forceps cups 210. When the working assembly 200 moves to the target tissue P or the area around the target tissue P, the two forceps cups 210 are controlled to open, and one of the forceps cups 210 is brought into contact with the target tissue P. For ease of description, the forceps cup 210 brought into contact with the target tissue P may be referred to as forceps cup 210-1, and the forceps cup 210 not brought into contact with the target tissue P may be referred to as forceps cup 210-2.

[0134] like Figure 3A As shown, at this time, the opening direction of the forceps cup 210-1 and the forceps cup 210-2 does not point to the location of the target tissue P. If the forceps cup 210-1 and the forceps cup 210-2 are directly controlled to be closed, the target tissue P cannot be clamped, or the target tissue P cannot be completely clamped, and the integrity and effectiveness of tissue sampling cannot be ensured.

[0135] S2, continuously applying a force toward the distal end to the tube, the working component abutting against the target tissue is subjected to a reaction force exerted by the target tissue, the movable part bends under the action of the force and the reaction force, and drives at least two working components to follow the distal movement of the movable part until the opening directions of at least two working components are aligned with the target tissue.

[0136] like Figure 3A as well as Figure 3BAs shown, a force F1 is continuously applied to the tube 100 along its axial direction toward the distal end. The aforementioned force F1 drives the tube 100 to move forward along its axial direction. However, since the working component 200 has abutted against the target tissue P, the tube 100 cannot move forward any further. Therefore, the target tissue P has a reaction force on the clamp cup 210-1. The aforementioned reaction force can be transmitted to the movable part 1101. Under the continuous action of the force F2 and the reaction force, the movable part 1101 bends, and the distal end of the movable part 1101 can follow its bending direction to point to the corresponding direction, and drive the clamp cups 210-1 and 210-2 to follow the distal movement of the movable part 110. The aforementioned movement can be a rotational movement with the abutment point of the clamp cup 210-1 (such as the distal end point of the clamp cup 210) as the center of the circle and the distance between the distal end points of the clamp cup 210-1 and the clamp cup 210-2 as the radius, and the opening direction of the working component 200 changes after the movement, as shown in FIG. Figure 3B As shown, until the opening directions of the forceps cup 210-1 and the forceps cup 210-2 point to the target tissue P, the alignment of the working component 200 and the target tissue P can be completed, so that the working component 200 can perform the next operation on the target tissue P, thereby improving the effectiveness and integrity of the medical device 10 in processing the target disc tissue P.

[0137] After the alignment of the working component 200 and the target tissue is completed, the process 20 may further include the following steps:

[0138] S3, controlling at least two working components to close to clamp the target tissue.

[0139] like Figure 3C As shown, after the opening directions of the forceps cups 210-1 and 210-2 are aligned with the target tissue P, the forceps cups 210-1 and 210-2 can be controlled to close to clamp the target tissue P. During this process, it is necessary to continuously apply a force F2 along the axial direction of the support portion 120 toward the distal end of the support portion 120 to the tube 100. The force F2 can offset the elastic restoring force generated by the curved active portion 1101, so that Figure 3C The tubular member 100 is shown in a stationary position.

[0140] S4, cancel the force applied to the pipe, the movable part returns to the initial unbent state, and drives at least two working parts to follow the far end of the movable part to reset.

[0141] like Figure 3DAs shown, when the active part 1101 loses the force F2, under the action of the elastic restoring force of the bent active part 1101, the active part 1101 returns to its initial unbent state, and drives the forceps cup 210-1 and the forceps cup 210-2 to follow the distal reset of the active part 1101, so that the working component 200 and the tube 100 clamping the target tissue P can be removed from the patient's body through the endoscopic channel.

[0142] Some embodiments of the present specification can adjust the opening directions of at least two working parts in the medical device 10 through the operation method of the aforementioned medical device 10, so that the aforementioned opening directions can be aligned with the target tissue to ensure the integrity and effectiveness of the treatment of the target tissue.

[0143] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this specification. Such modifications, improvements and corrections are suggested in this specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

[0144] At the same time, this specification uses specific words to describe the embodiments of this specification. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of this specification can be appropriately combined.

[0145] In addition, unless explicitly stated in the claims, the order of the processing elements and sequences described in this specification, the use of alphanumeric characters, or the use of other names are not intended to limit the order of the processes and methods of this specification. Although the above disclosure discusses some invention embodiments that are currently considered useful through various examples, it should be understood that such details are only for illustrative purposes, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of this specification. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only by software solutions, such as installing the described system on an existing server or mobile device.

[0146] Similarly, it should be noted that in order to simplify the description disclosed in this specification and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this specification, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the subject matter of this specification are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0147] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of this specification are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0148] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, etc., cited in this specification are hereby incorporated by reference in their entirety. Except for application history documents that are inconsistent with or conflicting with the contents of this specification, documents that limit the broadest scope of the claims of this specification (currently or later attached to this specification) are also excluded. It should be noted that if the descriptions, definitions, and / or use of terms in the materials attached to this specification are inconsistent or conflicting with the contents described in this specification, the descriptions, definitions, and / or use of terms in this specification shall prevail.

[0149] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, as an example and not a limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. A tube for medical equipment, characterized in that: It comprises a deflection part and a support part, wherein the rigidity of the deflection part is smaller than the rigidity of the support part. The portion of the deflection portion extending from the distal end of the support portion is a movable portion. When subjected to an external force, the movable portion bends, and the distal end of the movable portion follows the bending and points to a corresponding direction; The deflection portion has elasticity, and the movable portion returns to an initial state when the external force is removed.

2. The tube for medical equipment according to claim 1, characterized in that: The deflection portion entirely extends out of the support portion, and a proximal end of the deflection portion is connected to a distal end of the support portion.

3. The tube for medical equipment according to claim 1, characterized in that: The deflection portion and the support portion can slide relative to each other. After the deflection portion and the support portion slide relative to each other, the structure of the deflection portion located on the outer side of the distal end of the support portion along the axial direction constitutes the movable portion.

4. The tube for medical equipment according to claim 3, characterized in that: The deflection portion and the support portion are double-layer sleeves that can slide relative to each other.

5. The tube for medical equipment according to claim 4, characterized in that: The deflection part is sleeved in the support part or the support part is sleeved in the deflection part; At least a portion of the deflection portion may extend out of the distal end of the support portion to form the movable portion.

6. The tube for medical equipment according to claim 1, characterized in that: The axial length of the movable part in the initial state is 2 to 100 mm.

7. The tube for medical equipment according to claim 1, characterized in that: The angle between the direction pointed by the distal end of the movable part when the movable part is bent and the direction pointed by the distal end of the movable part in the initial state is in the range of 0 to 90 degrees.

8. The tube for medical equipment according to claim 1, characterized in that: The deflection portion includes a spring tube and / or a hollow tube.

9. The tube for medical equipment according to claim 8, characterized in that: The thread pitch of the spring tube is 0.4-1.2 mm.

10. The tube for medical equipment according to claim 1, characterized in that: The ratio of the elastic constants of the deflection portion to the support portion is in a range of 0.1 to 0.

5.

11. The tube for medical equipment according to claim 1, characterized in that: The rigidity ratio of the deflection portion to the support portion ranges from 0.1 to 0.

8.

12. The tube for medical equipment according to claim 1, characterized in that: The cross-sectional shape of the deflection portion along the axial direction of the deflection portion is a circular ring. The area of ​​the ring ranges from 1.0 to 2.0 mm 2 ; and / or The outer diameter of the ring is in the range of 1.8 to 2.25 mm, and the inner diameter of the ring is in the range of 1.4 to 1.8 mm.

13. The tube for medical equipment according to claim 1, characterized in that: The tube further includes a connecting portion, a proximal end of which is connected to the distal end of the deflection portion.

14. A medical device, comprising a medical device tube, a working component and an operating component as described in any one of claims 1 to 13, wherein the distal end of the tube is connected to the working component, the proximal end of the tube is connected to the operating component, and the working component follows the distal end of the active part in the tube to point in a corresponding direction.

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