Constructing and dredging assembly and medical equipment

Abstract

The utility model provides a dredging assembly and medical equipment, and the dredging assembly comprises a retraction catheter which is provided with a through operation channel; the guiding assembly can be arranged in the operation channel in a penetrating mode, and the guiding assembly is provided with a through guiding channel; the balloon catheter assembly can be arranged in the guide channel in a penetrating manner; the locking assembly is arranged on the guiding assembly and used for locking or unlocking when the guiding assembly slides in the axial direction of the balloon catheter assembly. When the locking assembly is in the locking state, the relative positions of the guiding assembly and the balloon catheter assembly are fixed. When the locking assembly is in the unlocking state, the guiding assembly can slide in the axial direction of the balloon catheter assembly, the relative position of the guiding assembly and the balloon catheter assembly is changed, and the retracting catheter is driven to stretch forwards or retreat. The balloon catheter assembly conducts transverse flexible minimally invasive retraction on the brain tissue, iatrogenic trauma is reduced, an operation channel is created, and damage such as hot burning, cutting and contusion-out cannot be caused.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a venting component and medical equipment. Background Art

[0002] When treating diseases such as cerebral hemorrhage, brain tumors, and hydrocephalus, Endoport technology (channel technology) is usually required to establish a surgical channel connecting the lesion site (bleeding site, tumor site, etc.) through the channel technology to obtain surgical field of view and surgical space. The establishment of a surgical channel is conducive to the repeated entry and exit of surgical instruments without damaging the brain tissue around the channel, protecting the brain tissue, and thus achieving the purpose of minimally invasive surgery.

[0003] In related technologies, the method of establishing a surgical channel, i.e., creating a channel, generally uses a hard sheath to violently and rigidly retract the brain tissue, causing a great impact on the brain tissue and causing great irreversible iatrogenic damage to the brain tissue, thereby bringing new prognostic problems and making it impossible to achieve truly minimally invasive treatment. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a brain opening component and a medical device, aiming to solve the problem that the brain opening method in the related technology uses a hard sheath to violently and rigidly pull the brain tissue, resulting in irreversible iatrogenic damage.

[0005] In order to solve the above technical problems, the first aspect of the present invention provides a through-hole assembly, comprising:

[0006] Retract the catheter and provide a through surgical channel;

[0007] A guide assembly is detachably connected to the retraction catheter, the guide assembly can be inserted into the surgical channel, and the guide assembly is provided with a through guide channel;

[0008] A balloon catheter assembly may be inserted into the guide channel, and the guide assembly may slide along the balloon catheter assembly to drive the retraction catheter to slide synchronously along the axial direction of the balloon catheter assembly; and

[0009] A locking assembly, disposed on the guide assembly, and used for locking or unlocking the guide assembly when the guide assembly slides axially along the balloon catheter assembly;

[0010] Wherein, when the locking assembly is in a locked state, the relative positions of the guide assembly and the balloon catheter assembly are fixed; when the locking assembly is in an unlocked state, the guide assembly can slide axially along the balloon catheter assembly, change its relative position with the balloon catheter assembly, and drive the retraction catheter to extend or retreat.

[0011] Optionally, the locking assembly includes a locking piece, the locking piece is provided with a locking through hole for the balloon catheter assembly to pass through, and the balloon catheter assembly can pass through the locking through hole and the guide channel;

[0012] When the balloon catheter assembly passes through the locking through hole, the locking piece can abut against the balloon catheter assembly through elastic force to lock the guide assembly and the balloon catheter assembly; the locking piece can be separated from the balloon catheter assembly under the action of external force to unlock the guide assembly and the balloon catheter assembly.

[0013] Optionally, the locking through hole comprises a first through hole and a second through hole which are interconnected; when the locking assembly is in an unlocked state, the balloon catheter assembly is slidably assembled in the first through hole; when the locking assembly is in a locked state, the balloon catheter assembly is clamped in the second through hole.

[0014] Optionally, the locking element comprises:

[0015] A connecting portion, fixed to the guide assembly;

[0016] a locking portion, elastically connected to the connecting portion, a first preset angle being formed between the locking portion and the connecting portion, and the first through hole and the second through hole being both provided in the locking portion; and,

[0017] The pressing portion is fixed to an end of the locking portion away from the connecting portion, and a second preset angle is formed between the pressing portion and the locking portion.

[0018] Optionally, in a direction from the locking portion toward the pressing portion, the second through holes and the first through holes are distributed in sequence.

[0019] Optionally, the balloon catheter assembly includes a catheter that can be inserted into the guide channel, the diameter of the first through hole is greater than or equal to the diameter of the catheter, and the diameter of the second through hole is smaller than the diameter of the catheter.

[0020] Optionally, the locking assembly further comprises a connecting seat, the connecting seat is fixed to the guiding assembly, one end of the locking member is fixed to the connecting seat, and the connecting seat is provided with a positioning hole;

[0021] The guide assembly comprises an upper cover detachably connected to the proximal end of the retraction catheter, and a mounting portion is arranged on a side of the upper cover away from the retraction catheter; the mounting portion is embedded in the positioning hole.

[0022] Optionally, the guide assembly also includes a connecting tube and a guide sheath head, one end of the connecting tube is connected to the upper cover, and the other end is connected to the guide sheath head, and the inner cavity of the guide sheath head, the inner cavity of the connecting tube and the inner cavity of the mounting part are connected in sequence to form the guide channel.

[0023] Optionally, the retraction catheter is provided with a slot, and the guide assembly further comprises a snap-fit ​​piece slidably assembled on the upper cover, and an elastic piece respectively connected to the upper cover and the snap-fit ​​piece, and the snap-fit ​​piece can slide to engage or disengage with the slot to connect or separate the retraction catheter and the guide assembly.

[0024] A second aspect of the utility model provides a medical device, comprising the venting assembly as described above.

[0025] Compared with the related art, the utility model has the following beneficial effects: before establishing the surgical channel, the guide assembly is assembled on the retractor catheter, and the locking assembly is in an unlocked state, at which time the retractor catheter and the guide assembly can move relative to the balloon catheter assembly, and when moving to the designated position, the balloon catheter assembly extends out of the guide channel of the guide assembly, and then the locking assembly is in a locked state, so that there is no relative movement between the balloon catheter assembly and the retractor catheter and the guide assembly. At this time, the balloon catheter assembly can perform lateral flexible minimally invasive retraction of the brain tissue by lateral filling and retraction, utilizing the latent change of the brain tissue, thereby reducing iatrogenic trauma to create a surgical channel, and will not cause damage such as heat burning, cutting, and frustration. After the surgical channel is expanded, the locking assembly is moved to an unlocked state, and the retractor catheter is pressed down to be placed into the surgical channel, so that the expanded surgical channel can be maintained, a stable surgical channel can be created, and the surrounding brain tissue can be protected to avoid damage to the brain tissue when the surgical instruments enter and exit; and after the brain tissue is retracted, the channel can be directly opened, thereby reducing the duration of the operation. The locking assembly is then moved to a locked state, the guide assembly and the balloon catheter assembly are locked to each other, and then the guide assembly is separated from the retraction catheter. Finally, the guide assembly, the locking assembly and the balloon catheter assembly are withdrawn together, leaving the retraction catheter to complete the passage in the brain tissue, thereby achieving minimally invasive treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1It is a schematic diagram of the assembly between the locking component in the opening component provided by the embodiment of the utility model, the retraction catheter and the guide component when the locking component is in the unlocked state;

[0028] Figure 2 It is a schematic diagram of the assembly between the locking component in the opening component provided by the embodiment of the utility model, the retraction catheter and the guide component when the locking component is in a locked state;

[0029] Figure 3 It is an exploded view of the retractor catheter, the guide assembly and the locking assembly in the opening assembly provided by the embodiment of the utility model;

[0030] Figure 4 It is a structural schematic diagram of a locking component in a venting component provided by an embodiment of the utility model;

[0031] Figure 5 It is a schematic structural diagram of a balloon catheter component in a ventilating component provided by an embodiment of the utility model;

[0032] Figure 6 It is a cross-sectional view of a locking component in a venting component provided by an embodiment of the utility model when the locking component is in an unlocked state;

[0033] Figure 7 It is a cross-sectional view of a locking component in a through-hole assembly provided by an embodiment of the utility model when the locking component is in a locked state;

[0034] Figure 8 This is a schematic diagram of a balloon placed in a predetermined position of the brain during the process of opening the brain in an embodiment of the utility model;

[0035] Fig. 9 It is a schematic diagram of the balloon being filled at a predetermined position of the brain during the process of opening the brain in the embodiment of the utility model;

[0036] Fig.10 It is a schematic diagram of the balloon being withdrawn from a predetermined position of the brain during the process of opening the brain in the embodiment of the utility model;

[0037] Fig.11 It is a schematic diagram of the embodiment of the utility model when the catheter is pulled open and pressed down during the process of opening the catheter;

[0038] Fig.12 It is a schematic diagram of the balloon catheter assembly and the guide assembly being withdrawn together during the process of opening the tube in the embodiment of the utility model;

[0039] Fig.13 It is a schematic diagram of the embodiment of the utility model when the catheter is retracted to a predetermined position in the brain after the completion of the descent.

[0040] In the accompanying drawings, the various reference numerals represent: 1. retractor catheter; 11. first end; 12. second end; 13. surgical channel; 14. hand-held part; 2. guide assembly; 21. upper cover; 211. mounting part; 22. connecting tube; 23. guide sheath head; 3. balloon catheter assembly; 31. catheter; 32. balloon; 33. push rod assembly; 34. injection assembly; 4. locking assembly; 41. locking piece; 411. connecting part; 412. locking part; 4121. first through hole; 4122. second through hole; 413. pressing part; 42. connecting seat; 5. snap-fit ​​part; 6. elastic piece. DETAILED DESCRIPTION

[0041] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] Example:

[0045] The utility model provides a medical device including a through-hole component, which is used to establish a surgical channel connected to the lesion site, so as to obtain a surgical field of view and a surgical space.

[0046] See also Figures 1 to 13The through-hole assembly includes a retractor catheter 1, a guide assembly 2, a balloon catheter assembly 3 and a locking assembly 4. The retractor catheter 1 is provided with a through surgical channel 13, and the retractor catheter 1 is also provided with a first end 11 and a second end 12 arranged opposite to each other in a preset direction; the guide assembly 2 is detachably connected to the retractor catheter 1, and the guide assembly 2 can be inserted into the surgical channel 13, and the guide assembly 2 is provided with a guide channel extending through in a preset direction; the balloon catheter assembly 3 can be inserted into the guide channel, and the guide assembly 2 can slide along the balloon catheter assembly 3 to drive the retractor catheter 1 to slide synchronously along the axial direction of the balloon catheter assembly 3; the locking assembly 4 is provided on the guide assembly 2, and the locking assembly 4 is used to lock or unlock when the guide assembly 2 slides along the axial direction of the balloon catheter assembly 3. Among them, when the locking assembly 4 is in a locked state, the relative positions of the guide assembly 2 and the balloon catheter assembly 3 are fixed; when the locking assembly 4 is in an unlocked state, the guide assembly 2 can slide axially along the balloon catheter assembly 3, change the relative position with the balloon catheter assembly 3, and drive the retraction catheter 1 to extend or retreat.

[0047] Before establishing the surgical channel, the guide assembly 2 is assembled on the retractor catheter 1, and the locking assembly 4 is in an unlocked state. At this time, the retractor catheter 1 and the guide assembly 2 can move relative to the balloon catheter assembly 3. When moving to the specified position, the balloon catheter assembly 3 extends out of the guide channel of the guide assembly 2, and then the locking assembly 4 is locked, so that there is no relative movement between the balloon catheter assembly 3 and the retractor catheter 1 and the guide assembly 2. At this time, the balloon catheter assembly 3 can perform lateral flexible minimally invasive retraction of the brain tissue by lateral filling and retraction, using the latent change of the brain tissue, reducing iatrogenic trauma to create a surgical channel, and will not cause damage such as heat burning, cutting, and frustration. After the expansion of the surgical channel is completed, the locking assembly 4 is moved to the unlocked state, and the retractor catheter 1 is pressed down to be placed into the surgical channel, so that the expanded surgical channel can be maintained, creating a stable surgical channel, providing protection for the surrounding brain tissue, and avoiding damage to the brain tissue when the surgical instruments enter and exit; and after the brain tissue is retracted, it can be directly opened, reducing the duration of the operation. Thereafter, the locking assembly 4 is moved to a locking state, the guide assembly 2 and the balloon catheter assembly 3 are locked with each other, and then the guide assembly 2 is separated from the retraction catheter 1. Finally, the guide assembly 2, the locking assembly 4 and the balloon catheter assembly 3 are withdrawn together, leaving the retraction catheter 1 to complete the patency in the brain tissue, thereby achieving minimally invasive treatment.

[0048] It should be noted that the first end 11 of the retractor catheter 1 is the distal end, the second end 12 is the proximal end, and the preset direction may be the extension direction of the second end 12 of the retractor catheter 1 toward the first end 11. When the guide assembly 2 is installed on the retractor catheter 1 and the locking assembly 4 moves to the unlocked state, the balloon catheter assembly 3 can move relative to the guide assembly 2, so that the balloon catheter assembly 3 can move relative to the retractor catheter 1; when the locking assembly 4 moves to the locked state, the locking assembly 4 locks the balloon catheter assembly 3 on the guide assembly 2, so that the balloon catheter assembly 3 and the retractor catheter 1 are fixed to each other.

[0049] See also Figure 2 , Figure 6 and Figure 7 The locking assembly 4 includes a locking piece 41, which is provided with a locking through hole for the balloon catheter assembly 3 to pass through, and the balloon catheter assembly 3 can pass through the locking through hole and the guide channel. When the balloon catheter assembly 3 passes through the locking through hole, the locking piece 41 can abut against the balloon catheter assembly 3 through elastic force, specifically, the inner wall of the locking through hole abuts against the balloon catheter assembly 3, and the guide assembly 2 and the balloon catheter assembly 3 are locked; the locking piece 41 can be separated from the balloon catheter assembly 3 under the action of external force, and the guide assembly 2 and the balloon catheter assembly 3 are unlocked, so that the locking or unlocking between the guide assembly 2 and the balloon catheter assembly 3 is achieved through the locking piece 41.

[0050] See also Figure 4 , Figure 6 and Figure 7 The locking through hole includes a first through hole 4121 and a second through hole 4122 that are interconnected; when the locking assembly 4 is in the unlocked state, the balloon catheter assembly 3 is slidably assembled in the first through hole 4121, so that the guide assembly 2 can slide axially along the balloon catheter assembly 3; when the locking assembly 4 is in the locked state, the balloon catheter assembly 3 is clamped in the second through hole 4122, so that the relative position of the guide assembly 2 and the balloon catheter assembly 3 is fixed. The aperture of the first through hole 4121 is larger than the aperture of the second through hole 4122, so as to ensure that the balloon catheter assembly 3 can slide in the first through hole 4121 and be clamped in the second through hole 4122.

[0051] See also Figure 1 , Figure 2 and Figure 4In some embodiments, one end of the locking member is fixed to the guide assembly 2 and the other end is extended to a suspended setting, the locking member 41 is elastic, and the first through hole 4121 and the second through hole 4122 are both located at the suspended end of the locking member 41, so that the positions of the first through hole 4121 and the second through hole 4122 compared to the balloon catheter assembly 3 can change with the movement of the locking member 41, so that the balloon catheter assembly 3 can be switched between the first through hole 4121 and the second through hole 4122. According to actual needs, the locking member 41 can be an elastic sheet.

[0052] It should be noted that, in other embodiments, the locking assembly 4 may include a locking member 41 rotatably connected to the guide assembly 2 and a restoring member respectively connected to the locking member 41 and the guide assembly 2, the locking member 41 may be rotated to the first position after being subjected to force, and the locking member 41 may be rotated to the second position under the action of the restoring force provided by the restoring member. Alternatively, the locking assembly 4 includes a locking member 41 slidably connected to the guide assembly 2, and the guide assembly 2 is provided with a first buckle position and a second buckle position, when the locking member 41 slides to buckle with the first buckle position, the locking member 41 is in the first position; when the locking member 41 slides to buckle with the second buckle position, the locking member 41 is in the second position.

[0053] See also Figure 4 The locking member 41 includes a connecting portion 411, a locking portion 412 and a pressing portion 413. The connecting portion 411 is fixed to the guide assembly 2, the locking portion 412 is elastically connected to the connecting portion 411, a first preset angle is formed between the locking portion 412 and the connecting portion 411, the first through hole 4121 and the second through hole 4122 are both provided in the locking portion 412, the pressing portion 413 is fixed to one end of the locking portion 412 away from the connecting portion 411, and a second preset angle is formed between the pressing portion 413 and the locking portion 412. Specifically, the locking portion 412 is bent toward the direction close to the guide assembly 2 under the action of an external force, at which time the balloon catheter assembly 3 enters the first through hole 4121; it moves toward the direction away from the guide assembly 2 under the action of a rebound force, at which time the balloon catheter assembly 3 enters the second through hole 4122. The first preset angle may be an obtuse angle. Setting the first preset angle allows the locking portion 412 to move to the first position when bent at a relatively small angle, thereby preventing the connection between the locking portion 412 and the connecting portion 411 from breaking due to excessive bending. Setting the pressing portion 413 may increase the area of ​​the pressing region of the locking member 41, thereby facilitating the application of pressure to the locking member 41 to bend the locking member 41; there is a second preset angle between the pressing portion 413 and the locking portion 412, and the second preset angle may be an obtuse angle. By setting the second preset angle, when the end of the pressing portion 413 away from the locking portion 412 just abuts against the guide assembly 2, the locking assembly 4 is in an unlocked state.

[0054] According to actual needs, the thickness of the connection between the locking portion 412 and the connecting portion 411 is thinner than the thickness of the locking portion 412 and the connecting portion 411 , which is convenient for bending the locking portion 412 and can provide greater resilience.

[0055] It should be noted that, in some embodiments, the connecting portion 411, the locking portion 412 and the pressing portion 413 can be integrally arranged to reduce the difficulty of manufacturing the locking member 41; the first preset angle is smaller than the second preset angle, so that when the locking portion 412 moves to the first position, the plane where the locking portion 412 is located is perpendicular to the preset direction, ensuring that the first through hole 4121 is coaxially arranged with the guide channel, thereby improving the sliding smoothness of the balloon catheter assembly 3; when the locking portion 412 moves to the second position, the angle between the plane where the locking portion 412 is located and the preset direction is an acute angle, so that the inner wall of the second through hole 4122 presses against the balloon catheter assembly 3, which is conducive to the locking assembly 4 locking the balloon catheter assembly 3 on the guide assembly 2.

[0056] See also Figure 4 In the direction from the locking portion 412 to the pressing portion 413, the first through hole 4121 and the second through hole 4122 are distributed in sequence, so that when the locking portion 412 moves toward the direction approaching the guide assembly 2, the balloon catheter assembly 3 will enter the first through hole 4121, and when the locking portion 412 moves toward the direction away from the guide assembly 2, the balloon catheter assembly 3 will enter the second through hole 4122.

[0057] See also Figure 4 , Figure 6 and Figure 7 The balloon catheter assembly 3 includes a catheter 31 that can be inserted into the guide channel. The diameter of the first through hole 4121 is greater than or equal to the diameter of the catheter 31, so that the catheter 31 can slide in the first through hole 4121; the diameter of the second through hole 4122 is smaller than the diameter of the catheter 31, and the shape of the cross section of the second through hole 4122 includes a polygon, which is conducive to the catheter 31 being stuck in the second through hole 4122. Among them, the catheter 31 can be a round tube, and the first through hole 4121 corresponds to a round hole; the polygon can be a rectangle, a pentagon, a hexagon, etc., preferably a rectangle, and the cross section formed by the connection of the first through hole 4121 and the second through hole 4122 is gourd-shaped. According to actual needs, the first through hole 4121 and the catheter 31 can be a clearance fit, and the second through hole 4122 and the catheter 31 can be an interference fit.

[0058] In some embodiments, a plurality of spaced-apart clamping ribs may be provided on the inner wall of the second through hole 4122 , and the length of the clamping ribs extends along a preset direction. The catheter 31 may be clamped in the second through hole 4122 under the joint action of the plurality of clamping ribs, thereby preventing the catheter 31 from sliding in the second through hole 4122 .

[0059] See also Figure 3 and Figure 4 The locking assembly 4 also includes a connecting seat 42, which is fixed to the guide assembly 2, one end of the locking member 41 is fixed to the connecting seat 42, and the connecting seat 42 is provided with a positioning hole; the guide assembly 2 includes an upper cover 21 detachably connected to the second end 12 of the retraction catheter 1, and a mounting portion 211 is provided on the side of the upper cover 21 away from the retraction catheter 1; the mounting portion 211 of the locking assembly 4 is embedded in the positioning hole, so that the fixing method between the connecting seat 42 and the upper cover 21 is relatively simple. Among them, the locking member 41 and the connecting seat 42 are arranged in one piece, which can improve the connection firmness between the locking member 41 and the connecting seat 42. According to actual needs, the locking member 41 and the connecting seat 42 can also be arranged separately.

[0060] See also Figure 1 , Figure 2 and Figure 3 The guide assembly 2 further includes a connecting tube 22 and a guide sheath head 23. One end of the connecting tube 22 is connected to the upper cover 21, and the other end is connected to the guide sheath head 23. The guide sheath head 23 is at least partially located outside the first end 11 of the retractor catheter 1, and the inner cavity of the guide sheath head 23, the inner cavity of the connecting tube 22, and the inner cavity of the mounting portion 211 are sequentially connected to form a guide channel.

[0061] See also Figure 3 and Figure 7 The retractor catheter 1 is provided with a card slot, and the opening assembly further includes a card connector 5 slidably assembled on the upper cover 21, and an elastic member 6 respectively connected to the upper cover 21 and the card connector 5. The card connector 5 can slide to engage or unengage with the card slot to connect or separate the retractor catheter 1 and the guide assembly 2. Specifically, pressing the card connector 5 can make it slide and unengage with the card slot to achieve the disassembly between the guide assembly 2 and the retractor catheter 1; or, the card connector 5 is engaged with the card slot under the action of the restoring force provided by the elastic member 6 to achieve the fixed connection between the guide assembly 2 and the retractor catheter 1.

[0062] See also Figure 5 and Figure 6 In some embodiments, a hand-held portion 14 is provided on the outside of the retractor catheter 1, and one end of the locking member 41 away from the guide assembly 2 extends along the length direction of the hand-held portion 14, so that when holding the hand-held portion 14, the thumb can be used to press the pressing portion 413 of the locking member 41 to make the locking portion 412 move toward the direction close to the upper cover 21 to the unlocked state, or the thumb can be released to make the locking portion 412 move toward the direction away from the upper cover 21 to the locked state, thereby facilitating the unlocking and locking of the locking assembly 4.

[0063] See also Figure 5 , Figure 6 and Figure 7The balloon catheter assembly 3 also includes a balloon 32, a push rod assembly 33 and an injection assembly 34. The balloon 32 is fixed to the distal end of the catheter 31 and is connected to the catheter 31. The push rod assembly 33 and the injection assembly 34 are both fixed to the proximal end of the catheter 31 and are connected to the catheter 31. The push rod assembly 33 is coaxially arranged with the catheter 31. The push rod assembly 33 is used to stretch the balloon 32 so that the balloon 32 can be stretched to an appropriate length; the injection assembly 34 has an angle with the catheter 31, and the injection assembly 34 is used to inject physiological saline into the stretched balloon 32, so that the balloon 32 is filled and the brain tissue is flexibly retracted.

[0064] The following is an example of the pass process:

[0065] See also Figure 5 , press the push rod assembly 33 down to a specific position so that the balloon 32 is stretched to an appropriate length.

[0066] See also Figure 6 , install the guide assembly 2 on the retractor catheter 1, press the locking piece 41, and the catheter 31 passes through the first through hole 4121 through the guide channel until the balloon 32 completely passes through the guide sheath head 23 and reaches the specified position.

[0067] See also Figure 7 , release the locking piece 41, the catheter 31 is stuck in the second through hole 4122, and the locking piece 41 locks the catheter 31 on the guide assembly 2, so that the balloon catheter assembly 3 and the retraction catheter 1 are not easily displaced relative to each other.

[0068] See also Figure 8 and Fig. 9 , place the balloon 32 into a predetermined position in the brain, and use the injection assembly 34 to slowly inflate the balloon 32 to retract the brain tissue until a surgical channel is initially formed.

[0069] See also Fig.10 , the liquid in the balloon 32 is withdrawn, and when the balloon 32 is retracted to the initial state, the locking piece 41 is pressed, and the catheter 31 enters the first through hole 4121.

[0070] See also Fig.11 , press down the retracted catheter 1 to make it enter the channel retracted by the balloon 32 , and after the retracted catheter 1 reaches a predetermined position, release the locking piece 41 , and the catheter 31 enters the second through hole 4122 .

[0071] See also Fig.12 and Fig.13 , press the card connector 5 to slide it until it is unlocked from the card slot, remove the guide assembly 2 from the retractor catheter 1, and then withdraw the balloon catheter assembly 3 and the guide assembly 2 together, leaving the retractor catheter 1 in the brain tissue to complete the cannulation.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A through-hole assembly, characterized in that: include: Retract the catheter and provide a through surgical channel; A guide assembly is detachably connected to the retraction catheter, the guide assembly can be inserted into the surgical channel, and the guide assembly is provided with a through guide channel; A balloon catheter assembly can be inserted into the guide channel, and the guide assembly can slide along the balloon catheter assembly to drive the retraction catheter to slide synchronously along the axial direction of the balloon catheter assembly; as well as, A locking assembly, disposed on the guide assembly, and used for locking or unlocking the guide assembly when the guide assembly slides axially along the balloon catheter assembly; Wherein, when the locking assembly is in a locked state, the relative positions of the guide assembly and the balloon catheter assembly are fixed; when the locking assembly is in an unlocked state, the guide assembly can slide axially along the balloon catheter assembly, change its relative position with the balloon catheter assembly, and drive the retraction catheter to extend or retreat.

2. The venting assembly according to claim 1, characterized in that: The locking assembly comprises a locking piece, the locking piece is provided with a locking through hole for the balloon catheter assembly to pass through, and the balloon catheter assembly can pass through the locking through hole and the guide channel; When the balloon catheter assembly passes through the locking through hole, the locking piece can abut against the balloon catheter assembly through elastic force to lock the guide assembly and the balloon catheter assembly; the locking piece can be separated from the balloon catheter assembly under the action of external force to unlock the guide assembly and the balloon catheter assembly.

3. The venting assembly according to claim 2, characterized in that: The locking through hole comprises a first through hole and a second through hole which are interconnected; when the locking assembly is in an unlocked state, the balloon catheter assembly is slidably assembled in the first through hole; when the locking assembly is in a locked state, the balloon catheter assembly is clamped in the second through hole.

4. The venting assembly according to claim 3, characterized in that: The locking member comprises: A connecting portion, fixed to the guide assembly; a locking portion, elastically connected to the connecting portion, a first preset angle being formed between the locking portion and the connecting portion, and the first through hole and the second through hole being both provided in the locking portion; and, The pressing portion is fixed to an end of the locking portion away from the connecting portion, and a second preset angle is formed between the pressing portion and the locking portion.

5. The venting assembly according to claim 4, characterized in that: In a direction from the locking portion toward the pressing portion, the second through holes and the first through holes are distributed in sequence.

6. The venting assembly according to claim 3, characterized in that: The balloon catheter assembly includes a catheter that can be inserted into the guide channel. The diameter of the first through hole is greater than or equal to the diameter of the catheter, and the diameter of the second through hole is smaller than the diameter of the catheter.

7. The venting assembly according to claim 2, characterized in that: The locking assembly further comprises a connecting seat, the connecting seat is fixed to the guiding assembly, one end of the locking member is fixed to the connecting seat, and the connecting seat is provided with a positioning hole; The guide assembly comprises an upper cover detachably connected to the proximal end of the retraction catheter, and a mounting portion is arranged on a side of the upper cover away from the retraction catheter; the mounting portion is embedded in the positioning hole.

8. The venting assembly according to claim 7, characterized in that: The guide assembly also includes a connecting tube and a guide sheath head, one end of the connecting tube is connected to the upper cover, and the other end is connected to the guide sheath head, and the inner cavity of the guide sheath head, the inner cavity of the connecting tube and the inner cavity of the mounting portion are connected in sequence to form the guide channel.

9. The venting assembly according to claim 7, characterized in that: The retraction catheter is provided with a slot, and the guide assembly also includes a clip slidably assembled on the upper cover, and an elastic member respectively connected to the upper cover and the clip. The clip can slide to engage or disengage with the slot to connect or separate the retraction catheter and the guide assembly.

10. A medical device, characterized in that: The invention comprises a through-hole assembly as claimed in any one of claims 1 to 9.

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