CN212015668U

CN212015668U - Disposable transparent brain retracting catheter for operation

Info

Publication number: CN212015668U
Application number: CN202020226752.0U
Authority: CN
Inventors: 徐永革
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-11-27
Anticipated expiration: 2030-02-28

Abstract

The utility model relates to a disposable transparent brain leads out pipe for operation belongs to brain minimal access surgery equipment technical field, solves the problem that current device caused the damage to patient's brain tissue easily. The disposable transparent brain retractor catheter for operation comprises: an outer tube and an inner tube; the cross sections of the outer pipe and the inner pipe are oval or long round, and both are tubular structures with deep thin parts and thick thin parts; the inner tube and the outer tube, and the guide needle and the guide hole are connected in a seamless sleeving manner; the utility model discloses prevented to lead out rocking of pipe entering intracerebral in-process, both reducible lead out the damage degree of pipe insertion in-process to brain tissue, still can further improve the accuracy of leading out the pipe insertion intracerebral position. Meanwhile, the conical design of the front end of the tube core of the retracting catheter further reduces the damage to brain tissue in the retracting catheter entering process, and the position is more accurate.

Description

Disposable transparent brain retracting catheter for operation

Technical Field

The utility model relates to a brain deep minimal access surgery equipment technical field especially relates to a disposable transparent brain leads out pipe for operation.

Background

When minimally invasive surgery is performed in deep brain, brain retraction devices are frequently used, and the existing deep brain retraction devices mainly comprise two types.

One type is known as disposable tissue expanders (e.g., manufactured by Peking Tianxinfu). The design of two-chamber, the scope relatively fixed (having restricted the nimble application of scope) that the operation was used, the design of pipe straight tube type (depth diameter unanimity) (and by shallow to the tapering design of dark pipe diameter, more be convenient for the cooperation of two apparatus in the operation to use than this kind of design), the cross section is circular (compare the ellipse design and has pushed away more two apparatus operation originally need not push away the brain tissue of pushing away), the tube core cavity is nevertheless not directly leading to the front end (the front end does not have straight hole, the directional guide needle of usefulness of brain location can not pass through).

In another class, they are called single use brain retraction guide catheters (e.g., manufactured by vinpocetine). The most slender one of the catheters is LW120807, the elliptic caliber at the front end of the catheter is 12X8mm, and the catheter with the caliber is used for performing intracerebral hemorrhage endoscope minimally invasive surgery, and is too thick (can be thinner) and has too large wound; in addition, the maximum length is only 7cm, and many cerebral hemorrhage operation positions are deep, and the length can not reach hematoma; in addition, the tube core (inner tube) of the catheter is in a thin-wall tubular shape with an oval cross section, although the front end opening is narrowed, the space in the tube core is large, the front end opening is still in an oval shape with a large area, and if a guide needle for positioning is used for introducing the catheter into a brain through the opening, the catheter is large in swing amplitude in the process of entering the brain, inaccurate in access and large in brain tissue damage. In actual use, when the brain retraction catheter is pushed into the brain, the retraction catheter cannot be fixed, so that the possibility of dislocation and deviation of the retraction catheter exists, and the risk of deep brain surgery is greatly increased.

SUMMERY OF THE UTILITY MODEL

In view of the above analysis, the present invention is directed to a disposable transparent brain retracting catheter for surgery, which is used to solve the problem of the existing devices and methods that are prone to cause great damage to the brain tissue of a patient.

The purpose of the utility model is mainly realized through the following technical scheme:

the utility model discloses among the technical scheme, a disposable transparent brain leads out pipe is used in operation, and the disposable transparent brain leads out pipe includes in the operation: an outer tube and an inner tube; the cross sections of the outer pipe and the inner pipe are oval or long round, and both are tubular structures with deep thin parts and thick thin parts; the inner tube and the outer tube, and the guide needle and the guide hole are connected in a seamless sleeving manner;

the disposable transparent brain retracting catheter for operation is guided by the mask guide plate, the guide bracket and the guide needle; the mask guide plate can be attached and fixed to the skin of the head of a patient, the guide bracket is mounted on the mask guide plate, and the mask guide plate is detachably and fixedly connected with the guide bracket; the guide needle can enter the brain according to the guide direction of the guide bracket; the retracting catheter can enter a preset position in the brain along the guide needle.

In the technical scheme of the utility model, the shallow part of the outer tube is provided with a limit stop ring, the inner tube is provided with a limit snap ring, and the limit stop ring and the limit snap ring form a limit structure; the limiting retaining ring is provided with a retaining ring holding part, and the limiting snap ring is provided with a snap ring holding part.

In the technical scheme of the utility model, the retaining ring holding part and the snap ring holding part are both arranged along the radial direction of the retracting conduit, the contact surface between the retaining ring holding part and the snap ring holding part is provided with a positioning structure, and the positioning structure comprises a positioning hole and a positioning block which have the same shape and size;

the retaining ring holding part and the clamping ring holding part are also provided with a clamping structure.

The utility model discloses among the technical scheme, the inner tube is equipped with the guiding hole that sets up along the inner tube axis, and the diameter of guiding hole equals with the direction needle.

The utility model discloses among the technical scheme, the guide bracket includes: the mounting head, the guide arm and the guide head; the guide arm is of a rigid structure and comprises a mounting end and a guide end, the mounting end is arranged at the mounting end of the guide arm, and the guide end of the guide arm is arranged at the guide head; the guide head is provided with a cylinder accommodating cavity, the cylinder accommodating cavity is axially extended to form an infinite-length cylinder space, and the guide support and the infinite-length cylinder space have no public part.

The utility model discloses among the technical scheme, the guide arm is curved bar or straight-bar, and the shape of cross section of guide arm is the rectangle.

The utility model discloses among the technical scheme, the direction head is a cylinder section of thick bamboo of lateral wall open-ended, and the cylinder holds the chamber and is located inside a cylinder section of thick bamboo, and the lateral wall opening of direction head is axial opening, and the central angle that corresponds is 30 ~ 120.

The utility model discloses among the technical scheme, the mask baffle is for operation T face mask baffle of frontal area or around auricle mask baffle.

In the technical scheme of the utility model, the mask guide plate is provided with a mounting seat; the mounting seat is provided with a mounting hole, the mounting head of the guide support can be inserted into the mounting hole of the mask guide plate, the shape and the size of the cross section of the mounting hole are the same as those of the cross section of the mounting head, and the depth of the mounting hole is larger than the length of the mounting head.

In the technical scheme of the utility model, the outer tube is the hyaline tube.

The utility model discloses technical scheme can realize one of following effect at least:

1. the utility model prevents the shaking of the retracting catheter by the seamless matching between the inner tube and the outer tube, the guide hole and the guide needle, thereby reducing the damage to the brain tissue in the process of feeding the retracting catheter into the brain to the maximum extent, simultaneously further improving the accuracy of the inserting position of the retracting catheter, reducing the damage to the brain tissue separation in the process of feeding the retracting catheter and protecting the body cutting benefit of the patient;

2. the utility model can fix the guide needle on the specific posture through the mask guide plate which is designed and printed instantly and the guide bracket with the specific structure, thereby ensuring that surgical instruments such as a retracting catheter and the like can be accurately inserted into the target focus in the brain along the guide needle and stride over the scalp which is retracted and deformed near the lower incision of the bracket through the guide bracket, and realizing the positioning and guiding of the bone window craniotomy;

3. the utility model prevents the shaking of the retracting catheter by the seamless matching between the inner tube and the outer tube, the guide hole and the guide needle, thereby reducing the damage to the brain tissue in the process of feeding the retracting catheter into the brain to the maximum extent, simultaneously further improving the accuracy of the inserting position of the retracting catheter, reducing the damage to the brain tissue separation in the process of feeding the retracting catheter and protecting the body cutting benefit of the patient;

4. the utility model discloses a mask baffle and guide bracket can adopt 3D printing technique to print, and the mask baffle and the design of guide bracket separation for the guide bracket needn't 3D print to accomplish, can prefabricate to disposable consumptive material, and like this each operation need not print the guide bracket, only through 3D printing technique print the mask baffle can, shortened operation preparation time greatly, win valuable rescue time for emergency operations such as cerebral hemorrhage; the two are designed separately, the guide support can be reliably sterilized in advance, so that surgical instruments entering brain tissues are sterilized by the guide support which is reliably sterilized, and the surgical instruments (mask guide plates) are not immediately 3D printed and can only be soaked and sterilized by common iodophors, so that the surgical operation is safer;

4. the device of the utility model is simple in structure, low in processing cost, simple in method step, easy and simple to handle, need not to medical personnel's special professional training.

The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.

FIG. 1 is a schematic view of a guide bracket without reinforcing ribs according to an embodiment of the present invention;

fig. 2 is a schematic view of a guide bracket provided with a reinforcing rib according to an embodiment of the present invention;

fig. 3 is a schematic view of a frontal face mask guide according to an embodiment of the present invention;

FIG. 4 is a schematic view of a mask guide plate around the auricle according to an embodiment of the present invention;

fig. 5 is a schematic view of the installation of the frontal face mask guide plate and the guide bracket according to the embodiment of the present invention;

FIG. 6 is a schematic view of the installation of a guide plate and a guide bracket of a mask around an auricle according to an embodiment of the present invention;

fig. 7 is a schematic view of a retraction catheter according to an embodiment of the present invention.

Reference numerals:

1-a guide bracket; 2-frontal face mask guide plate; 3-mask guide plate around auricle; 4-inner tube; 5-an outer tube; 6-a guide hole;

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of the invention, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, which may be a mechanical connection, an electrical connection, which may be a direct connection, or an indirect connection via an intermediate medium. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.

Example 1

The embodiment of the utility model provides a guiding device for brain deep minimal access surgery, guiding device includes: the mask comprises a guide bracket 1, a mask guide plate, a guide needle and a retraction catheter; the guide bracket 1 is arranged on the mask guide plate; the guide needle can be inserted into a retracting catheter, and the retracting catheter is detachably and fixedly connected with the guide support 1; the mask guide plate is attached to the skin of the head of the patient, and the guide needle and the retraction catheter can be inserted into the brain of the patient. When in actual use, the embodiment of the utility model provides a still use guide clamp and suitable piping of pilot pin, guide clamp and suitable piping of pilot pin can be fixed on guide bracket 1 for the relative fixation of pilot pin and guide bracket 1.

As shown in fig. 1, a guide bracket 1 is a guide bracket 1 of a retracting catheter for minimally invasive brain surgery, and the guide bracket 1 includes: the mounting head, the guide arm and the guide head; the guide arm is of a rigid structure and comprises a mounting end and a guide end, the mounting end is arranged at the mounting end of the guide arm, and the guide end of the guide arm is arranged at the guide head; the guide head is provided with a cylindrical accommodating cavity which is used for accommodating the guide clamp and the positioning needle adaptive pipe and fixing the position of the guide needle through the guide clamp and the positioning needle adaptive pipe; can also be used for placing surgical instruments such as a drainage tube and the like. The axial extension of cylinder accommodation chamber forms infinitely long cylinder space, and guide bracket 1 does not have the public part with infinitely long cylinder space. The mounting head of guide bracket 1 is pegged graft in the mounting hole of mask baffle, and the axis that the cylinder held the chamber coincides with the axis of leading out the pipe, can fix the gesture and the direction of guide needle through guide bracket 1, can keep the pointed end of guide needle to be located patient's focus department in the brain all the time. Because the guide support 1 abduces the infinite cylinder space, the scalp deformed in a certain range around the incision is prevented from being covered by the guide plate, and the accurate approach direction of the retracting catheter is ensured.

In order to reduce under the prerequisite that does not influence structural strength the utility model discloses manufacturing cost, the embodiment of the utility model provides an, the guiding arm is knee or straight-bar, and the shape of cross section of guiding arm is the rectangle, not only can guarantee the structural strength of guiding arm, can also reduce the material consumption by furthest, and the cross sectional shape of rule also makes things convenient for the production and processing, can greatly save the manufacturing cost of the embodiment of the utility model.

The embodiment of the utility model provides an in, the cross section of installation head is the rectangle, and in the installation head can insert the mounting hole of mask baffle, the rectangle with the interface shape can form the spacing fixed of circumference to the installation of leading truck 1 and mask baffle.

In order to further stabilize the spatial position who confirms guide bracket, the embodiment of the utility model provides an in, guide bracket's installation head is equipped with the spacing ring with the junction of guide arm for the degree of depth that restriction installation head inserted mask baffle mounting hole.

Simultaneously in order to prevent that the spacing ring cuts to pieces and scratches or collide with other article, the embodiment of the utility model provides a spacing ring is the terrace with edge, and the top surface shape and the size of terrace with edge all the same with the cross section of guide arm, the bottom surface shape and the size of terrace with edge are the same with the cross section of installation head. The transition of the prismatic table can prevent the limiting ring from being scraped or collided with other articles.

The embodiment of the utility model provides an in, the direction head is a lateral wall open-ended cylinder section of thick bamboo, when putting the drainage tube through the components of a whole that can function independently direction clamp in the direction head in the operation, can break away from the drainage tube that inserts in the brain through the lateral wall opening part of direction head and direction clamp to accomplish the tub operation of putting to focus department in the brain. The side wall opening of the guide head is an axial opening, and the corresponding central angle is 30-120 degrees, preferably 60-90 degrees.

The guide arm is fixedly connected with the side wall of the guide head, so that the guide arm can be prevented from causing spatial interference to an infinite-length cylindrical space. For the convenience of the utility model discloses processing, the leading arm is along the radial and the first fixed connection of direction head, and the lateral wall opening is symmetrical along the circumference of direction head in the leading arm. Furthermore, to facilitate the mounting of the guide bracket 1, the axis of the cylindrical accommodation chamber is parallel to the axis of the mounting head.

As shown in fig. 2, in the embodiment of the present invention, a reinforcing rib is disposed at the joint of the guide arm and the guide head.

In consideration of the practical situation, the embodiment of the present invention has the following dimensions:

the length multiplied by the width of the cross section of the guide arm is 8mm multiplied by 6mm, and the length of the guide arm along the axial direction of the cylindrical accommodating cavity is 52.7 mm;

the distance between the axis of the cylindrical accommodating cavity and the axis of the mounting head is 54 mm;

the length of the guide head is 30mm, and the diameter of the cylindrical accommodating cavity is 16.3 mm;

the height of the limiting ring is 7.3 mm;

the mounting head length is 10 mm.

As shown in fig. 3 and 5, the mask guide is a frontal mask guide 2 for positioning a brain surgery or a circumaural mask guide 3 for positioning a brain surgery.

And designing and obtaining the frontal face mask guide plate 2 by adopting a 3D printing technology. The frontal face mask guide plate 2 is designed on the basis of dissecting hard-texture bilateral eyebrow arches of the skull of a patient and nasal bridge and nasal root, and comprises a frontal plate, a nasal bridge plate and a mounting seat; the nose bridge plate is arranged in the center of the lower part of the forehead plate, and the nose bridge plate and the forehead plate form a T-shaped curved plate; the mounting seat is arranged on the forehead plate; the forehead plate, the nose bridge plate and the mounting seat are of an integrated structure. The outer edges of the two sides of the forehead plate respectively reach the outer edges of the two eyebrow arches, wrap the eyebrow arches and the eyebrows, and can also wrap part of the eyelids as required; grin-through from both sides continues down to the root of the two side nosewings.

The forehead plate has a height of 2-3 cm. The frontal and facial mask guide plate 2 is printed, and the frontal and facial mask guide plate 2 for positioning the brain operation can be attached and fixed at the corresponding position of the frontal and facial part of the patient through the attachment of the frontal plate and the eyebrow arch and the attachment of the nose bridge plate and the nose bridge.

The mounting seat is provided with a mounting hole, the mounting head can be inserted into the mounting hole, the shape and the size of the cross section of the mounting hole are the same as those of the cross section of the mounting head, and the depth of the mounting hole is larger than the length of the mounting head.

As shown in fig. 4 and 6, the auricle-surrounding mask guide plate 3 for positioning the brain in the surgical operation is designed on the basis of the anatomy of the auricle with determined space shape and position and the skin reverse fold of the auricle base part with fixed position connected with the skull, and comprises a skull plate, an auricle-surrounding plate and a mounting seat; the ear-winding plate can be attached to the back of an auricle in a three-dimensional manner, the skull plate is a convex polygonal curved plate, the joint of the ear-winding plate and the skull plate can be attached to the ear root of a patient, and the mounting seat is arranged on the outer side of the ear-winding plate; the surrounding ear contour plate and the mounting seat are of an integrated structure.

For example, for the surgical guidance of cerebellar hemispheres and brainstem, the guide plate needs to extend towards the back of the pillow by 8cm behind the external auditory canal and 2cm above the external auditory canal on the basis of the ear root; while the common top-rear approach mainly extends upwards, 2cm behind and 10cm above the external auditory meatus are needed.

Too large a tragus mask guide 3 will prolong the printing time, too small a tragus mask guide 3 will be unstable or it will be difficult to include guide bracket landing feet, the guide bracket mounting head will engage with the guide plate mounting holes, so it will be elaborated in 3D printing software.

The circumaural mask guide plate 3 is designed and obtained by adopting a 3D printing technology. The ear-winding mask guide plate 3 for positioning the brain operation can be fixed at the position of the patient around the auricle part by the attachment of the ear-winding plate and the auricle.

The mounting seat is provided with a mounting hole, the mounting head of the guide support can be inserted into the mounting hole of the mask guide plate, the shape and the size of the cross section of the mounting hole are the same as those of the cross section of the mounting head, and the depth of the mounting hole is larger than the length of the mounting head.

The embodiment of the utility model provides a during the in-service use, medical personnel select frontal plane portion face mask baffle 2 or around auricle face mask baffle 3 according to actual demand. Fix the mask baffle at patient's head skin, install guide bracket 1 in the mount pad, realize that guide bracket 1's cylinder holds the fixed of axis relative patient's head in chamber to make the guide needle can insert patient's focus department smoothly. When the mask guide plate is designed by 3D printing, the CT image information of the brain of a patient needs to be input into computer software, and the insertion direction, the target point and the posture of a guide needle are designed in the software. The area range of the mask guide plate and the position and the posture of the mounting seat on the mask guide plate can be determined by determining the insertion direction, the target point and the posture of the guide pin. It should be noted that the frontal face mask guide plate 2 for positioning the brain surgery and the circumaural face mask guide plate 3 for positioning the brain surgery can cover all requirements for positioning the brain deep minimally invasive surgery: the frontal face mask guide plate 2 can meet the positioning requirements of operations of bilateral frontal lobes and deep brain tissues thereof, namely, the forehead approach; the guide plate 3 of the mask around the auricle can meet the design requirements of the approach of all brain surgeries on the same side except the frontal lobe and the deep part thereof, namely the temporal lobe, the parietal lobe, the occipital lobe, the basal ganglia, the thalamus and cerebellum and the brainstem on the same side.

As shown in fig. 7, the retracting catheter is a transparent retracting catheter for operation, comprising: an outer tube 5 and an inner tube 4; the cross sections of the outer tube 5 and the inner tube 4 are both oblong or elliptical and are both tubular structures with thin and shallow deep parts and thick parts, so that the retraction catheter can be more easily inserted into the brain of a patient, and the damage to the brain tissue of the patient in the insertion process is reduced; the inner tube 4 is provided with a guide hole 6 arranged along the axis of the inner tube 4. When the utility model is used, as long as the guide needle is fixed, the guide needle can be inserted into the guide hole 6, and the guide catheter is inserted into a preset position, so that the deep part of the guide catheter is inserted into the focus of the brain of a patient.

In order to reduce the injury of the guide tube to the brain tissue of the patient, the embodiment of the utility model provides an, be seamless form connection that cup joints between inner tube 4 and the outer tube 5, between guide needle and the guiding hole 6, furthest reduced the axial gap of the guide tube of leading, when leading the guide tube and inserting in the middle of the brain tissue of the patient, avoid the brain tissue to dip in the gap. It should be noted that in order to reduce damage to the brain tissue of the patient, the guide needle has a diameter not exceeding 2 mm.

The shallow portion of outer tube 5 is equipped with spacing fender ring, and inner tube 4 is equipped with spacing snap ring, and spacing fender ring and spacing snap ring form limit structure, and the diameter of spacing snap ring is more than or equal to spacing fender ring, and after accomplishing the insertion of leading out the pipe, inner tube 4 need take out, and the size of spacing snap ring is not less than the size of spacing fender ring and makes things convenient for taking out of inner tube 4.

The embodiment of the utility model provides an in, be equipped with on the spacing fender ring and keep off the ring and hold the portion, be equipped with the snap ring on the spacing snap ring and hold the portion, make things convenient for medical personnel to hold fixed pipe that leads out.

In order to guarantee the relatively fixed between inner tube 4 and the outer tube 5, keep off that ring portion and snap ring portion of holding all follow the radial setting of drawing the pipe, keep off that ring portion and snap ring portion of holding between the contact surface is equipped with location structure, and location structure includes the same locating hole of shape and size and locating piece, through the block of locating hole and locating piece, forms the circumferential relatively fixed between inner tube 4 and the outer tube 5. Also, the size of the retainer ring holding portion is not smaller than that of the retainer ring holding portion in order to facilitate removal of the inner tube 4.

The embodiment of the utility model provides an in, keep off ring and hold portion and snap ring and hold portion and still be equipped with buckle structure, buckle structure can be with the axial relatively fixed of edge of inner tube 4 and outer tube 5.

Because insert the back of focus department in patient's brain with drawing the pipe, take off inner tube 4 and leave outer tube 5 in patient's brain and as the retractor of minimal access surgery, for the convenient observation of scope or microscope to the focus, the embodiment of the utility model provides an outer tube 5 is the hyaline tube.

In order to conveniently know the insertion depth of the retraction catheter, the outer surface of the outer tube 5 of the retraction catheter is provided with scale marks so as to know the insertion depth of the retraction catheter and ensure that the tip of the retraction catheter is accurately inserted into a focus of a patient.

Example 2

The embodiment of the utility model provides a guide method for brain deep minimal access surgery, guide method uses the guide device for brain deep minimal access surgery in embodiment 1.

The guiding method comprises the following steps:

s1, manufacturing a mask guide plate through a 3D printing technology;

inputting the head CT image data of the patient into the 3D printing software. According to the details of a case, determining and designing an operation access, namely the insertion direction, the target point and the posture of the guide needle; and designing a head mask guide plate in 3D printing software according to the set surgical access, namely determining the positions of the frontal mask guide plate 2 or the circumaural mask guide plate 3 and the mounting seat, and performing 3D printing to obtain the mask guide plate.

S2, mounting the guide bracket 1 on the mask guide plate;

the guide clamp and the positioning needle adaptive pipe are inserted into a guide head of the guide support, then the guide support is installed on the mask guide plate, and the guide support 1 is manufactured in a prefabricated mode in batches in advance or can be manufactured in advance by adopting a 3D printing technology.

S3, attaching and fixing the mask guide plate on the corresponding part of the skin of the head of the patient;

the frontal and facial mask guide plate 2 for positioning the brain operation can be fixed on the frontal and facial part of the patient through the joint of the frontal plate and the eyebrow arch and the joint of the nose bridge plate and the nose bridge; or, the auricle-wound mask guide plate 3 for positioning the brain operation can be fixed at the position of the patient around the auricle part by the attachment of the auricle-wound plate and the auricle. In actual operation, because the use time is short, the mask guide plate can be temporarily attached and fixed to the corresponding part of the skull of a patient in a manual attaching and fixing mode.

S4, inserting the guide needle into the brain of the patient through the guide bracket 1 until the tip of the guide needle is inserted into the focus of the patient;

it should be noted that, because the guiding needle is inserted into the brain of the patient, before the guiding method of the embodiment of the present invention is performed, the minimally invasive craniotomy of the patient is required, which includes: incise and retract the scalp, mill a small area of the bone flap, incise the dura mater, treat the cerebral cortex, and the like.

The guide needle is a metal long straight needle with two ends round and blunt and the diameter of the metal long straight needle is 2 mm.

S5, keeping the space position of the guide needle still, and removing the guide bracket 1 and the mask guide plate;

s6, inserting the retraction catheter into the brain of the patient through the guide needle until the tip of the retraction catheter is inserted into the focus of the patient;

the guide needle is inserted into the guide hole 6 of the inner tube 4, the position of the guide needle is kept still, and the retraction catheter is inserted into the brain of the patient.

S7, keeping the outer tube 5 still, taking out the inner tubes 4 of the guide needle and the retracting catheter from the outer tube 5 step by step, and realizing instrument entry and operation part of the deep brain minimally invasive surgery through the inner space of the outer tube 5 of the retracting catheter which is dynamically fixed;

the buckling structure between the inner tube 4 and the outer tube 5 is unfastened, the inner tube 4 of the guide needle and the retracting catheter is removed step by step, and medical personnel can use an endoscope or other instruments to perform minimally invasive surgery in the outer tube 5 of the retracting catheter.

To sum up, the embodiment of the utility model provides a disposable transparent brain retraction catheter for operation, the utility model can fix the guide needle on a specific posture through the mask guide plate with a specific structure and the guide bracket with a specific structure, ensure that the retraction catheter crosses the retracted and deformed scalp near the lower incision of the bracket along the guide needle through the guide bracket to be accurately inserted into the target focus in the brain, and realize the positioning and guiding of the bone window craniotomy; the utility model prevents the shaking of the guide tube through the seamless matching between the inner tube and the outer tube of the guide tube, the guide hole and the guide needle, thereby reducing the damage to the brain tissue in the process of feeding the guide tube into the brain, simultaneously further improving the accuracy of the insertion position of the guide tube, reducing the damage to the brain tissue expansion in the process of feeding the guide tube into the brain, and protecting the body cutting benefit of the patient; the utility model discloses a mask baffle adopts 3D printing technique to print, and mask baffle and guide bracket separation design for guide bracket can prefabricate to disposable consumptive material, and the guide bracket need not be printed in every operation like this, only need through 3D printing technique print mask baffle can, shortened operation preparation time (within 30 minutes) greatly, win valuable rescue time for emergency operations such as cerebral hemorrhage; the two are designed separately, the prefabricated guide support can be reliably sterilized in advance, so that surgical instruments entering brain tissues are treated by the guide support with reliable sterilization and disinfection, but not the instant 3D printing instruments (mask guide plates) which can only be soaked and disinfected by common iodophors, and the surgical operation is safer; the device of the utility model is simple in structure, low in processing cost, simple in method step, easy and simple to handle, need not to medical personnel's special professional training.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. A disposable transparent brain retraction catheter for surgery, characterized in that it comprises: an outer tube (5) and an inner tube (4); the cross sections of the outer pipe (5) and the inner pipe (4) are oval or long round, and both are of tubular structures with deep thin parts and thick parts; the inner tube (4) and the outer tube (5) and the guide needle and the guide hole (6) are connected in a seamless sleeved mode;

the disposable transparent brain retracting catheter for the operation is guided by a mask guide plate, a guide bracket (1) and a guide needle; the mask guide plate can be attached and fixed to the skin of the head of a patient, the guide support (1) is installed on the mask guide plate, and the mask guide plate is detachably and fixedly connected with the guide support (1); the guide needle can enter the brain according to the guide direction of the guide bracket; the retracting catheter can enter a preset position in the brain along the guide needle.

2. The disposable transparent brain retraction catheter for operation according to claim 1, wherein the shallow part of the outer tube (5) is provided with a limit stop ring, the inner tube (4) is provided with a limit snap ring, and the limit stop ring and the limit snap ring form a limit structure; the limiting blocking ring is provided with a blocking ring holding part, and the limiting clamping ring is provided with a clamping ring holding part.

3. The disposable transparent brain retraction catheter for surgery as claimed in claim 2, wherein the baffle ring holding part and the snap ring holding part are both arranged along the radial direction of the retraction catheter, and the contact surface between the baffle ring holding part and the snap ring holding part is provided with a positioning structure, and the positioning structure comprises a positioning hole and a positioning block which are the same in shape and size;

the retaining ring holding part and the clamping ring holding part are further provided with clamping structures.

4. The disposable transparent brain retraction catheter for surgery according to claim 3, wherein the inner tube (4) is provided with a guide hole (6) arranged along the axis of the inner tube (4), the diameter of the guide hole (6) being equal to the diameter of the guide needle.

5. The surgical disposable transparent brain retraction catheter according to claim 4, characterized in that the guide bracket (1) comprises: the mounting head, the guide arm and the guide head; the guide arm is of a rigid structure and comprises a mounting end and a guide end, the mounting end is arranged at the mounting end of the guide arm, and the guide end of the guide arm is arranged at the guide head; the guide head is provided with a cylinder accommodating cavity, the cylinder accommodating cavity is axially extended to form an infinite-length cylinder space, and the guide support (1) and the infinite-length cylinder space have no public part.

6. The disposable transparent brain retraction catheter for surgery according to claim 5, wherein the guide arm is a bent or straight rod and the cross section of the guide arm is rectangular.

7. The disposable transparent brain retraction catheter for surgery as claimed in claim 6, wherein the guiding head is a cylinder with an opening on the side wall, the cylinder containing cavity is located inside the cylinder, the opening on the side wall of the guiding head is an axial opening, and the corresponding central angle is 30-120 °.

8. The disposable transparent brain retraction catheter for surgery according to claim 7, characterized in that the mask guide is a frontal T-face mask guide for surgery (2) or a circumaural mask guide (3).

9. The disposable transparent brain retraction catheter for surgery according to claim 8, wherein a mounting seat is provided on said mask guide plate; the mounting seat is provided with a mounting hole, the mounting head of the guide support can be inserted into the mounting hole of the mask guide plate, the shape and the size of the cross section of the mounting hole are the same as those of the cross section of the mounting head, and the depth of the mounting hole is larger than the length of the mounting head.

10. The disposable transparent brain retraction catheter for surgery according to claim 9, characterized in that the outer tube (5) is a transparent tube.