Transparent tubular retractor for craniocerebral deep surgery

Abstract

The invention discloses a transparent tubular retractor for deep craniocerebral surgery, and relates to the technical field of surgical instruments, the transparent tubular retractor comprises an internal sheath tube and an external sheath tube which are used for retracting a surgery cavity during deep craniocerebral surgery, the external sheath tube and the internal sheath tube are provided with fixing and adjusting assemblies, the external sheath tube is provided with a water delivery pipe, and the water delivery pipe is provided with a water outlet. A pressurized cleaning pipeline assembly is arranged in the water conveying pipe; a fixing rod capable of being rotationally adjusted is arranged on an external sheath tube, the fixing rod is connected with an external snakelike retractor device through a fixing frame, the snakelike retractor is adjusted to drive the external sheath tube and an internal sheath tube to retract and fix a craniocerebral operation part of a patient, or the external sheath tube is adjusted, so that the craniocerebral operation part of the patient is fixed, and the craniocerebral operation part is fixed. Water in the water delivery pipe is pressurized through the pressurized cleaning pipeline assembly and then sprayed out so as to clean an operation cavity or an internal sheathing canal; the device has the advantages of being convenient to use, comprehensive in function, high in flexibility and simple in structure.

Description

Technical Field

[0001] The invention relates to the technical field of surgical instruments, and in particular to a transparent tubular retractor for deep cranial and brain surgery. Background Art

[0002] Neuroendoscopic cranial surgery has become an important development direction of minimally invasive neurosurgery. The core of this technology is to further reduce the trauma of previous surgical approaches, expand the exposure of lesions, and increase the chance of intuitive resection of lesions. Neuroendoscopic surgery can be mainly divided into extrathecal surgery and intrathecal surgery. Extrathecal surgery mainly uses the natural physiological cavity of the human body to perform skull base surgery. When performing cranial surgery, it is generally necessary to use a retractor to stretch the skin or bones of the patient's brain surgical site to facilitate doctor observation and surgical operations. However, the existing retractors for deep cranial surgery have many inconveniences when used, such as the surgical sheath is not convenient to operate, the steering is not good, and the assistant physician needs to hold the retractor and adjust it according to the situation, which has high requirements for manual operation. In addition, some retractors do not meet the requirements for skin tissue traction during operation, and the surgical operation space of medical staff is small, which is not conducive to observation and operation, and the functions are not comprehensive enough.

[0003] Existing retractor devices, such as a transparent tubular retractor for deep cranial brain surgery provided by publication number CN108814664A, include a surgical sheath and an inner sheath arranged in the surgical sheath, the front ends of the surgical sheath and the inner sheath are arranged with conical tips, and the cross-sections of the surgical sheath and the inner sheath are both elliptical. The application designs a handle for grasping at the tail of the sheath, but the device can only be retracted and fixed by the doctor's hand, which is inconvenient to adjust during the operation, and the need for hand-held fixation easily leads to excessive consumption of labor costs. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention aims to provide a transparent tubular retractor for deep cranial and brain surgery. By designing a fixed adjustment component, a rotatable and adjustable fixing rod is arranged on the telescopic rod to fix the external sheath and the serpentine retractor. By designing a pressurized cleaning pipeline component, the water flow in the input water pipe is pressurized and sprayed from one end of the external sheath to clean the internal sheath or the surgical cavity. The present invention has the advantages of easy use, comprehensive functions, strong flexibility and simple structure.

[0005] The main idea of ​​the technical solution adopted by the present invention is: to design a fixed adjustment component, by arranging a telescopic rod that can be fixed at one end of the external sheath and the internal sheath, and arranging a rotatable and adjustable fixing rod on the telescopic rod of the external sheath, so as to fix the external sheath and the serpentine retractor; to design a pressurized cleaning pipeline component, by opening a water pipe in the wall of the external sheath, and arranging a structure near one end of the external sheath that can pressurize the water flow entering the water pipe, so that the water flow in the water pipe is sprayed out from one end of the external sheath, so as to clean the tip of the internal sheath or the surgical cavity.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A transparent tubular retractor for deep cranial and brain surgery comprises an inner sheath and an outer sheath for retracting the surgical cavity during deep cranial and brain surgery. The outer sheath and the inner sheath are provided with fixed adjustment components, the outer sheath is provided with a water pipe, and the water pipe is provided with a pressurized cleaning pipeline component.

[0007] The fixed adjustment component includes a first telescopic rod fixed to one end of an external sheath tube and a second telescopic rod fixed to one end of an internal sheath tube. The end of the first telescopic rod away from the external sheath tube is rotatably connected to a fixed rod by a hinge rod, and the end of the fixed rod away from the first telescopic rod is provided with a fixing piece for fixing to an external serpentine retractor; the external sleeve can be fixedly connected to the external serpentine retractor through the fixing piece, and fixed to the deep surgical site of the patient's brain through the serpentine retractor, and the fixing rod is driven to rotate and adjust through the serpentine retractor, so that the doctor can adjust the angle of the external sleeve without holding the first telescopic rod or the second telescopic rod.

[0008] Based on the above technical solution, further, a connecting rod is provided at one end of the second telescopic rod away from the internal sheath, and a connecting hole matching the connecting rod is opened in the middle of the fixed rod; through the mutual cooperation between the connecting rod and the connecting hole, the internal sheath and the external sheath can maintain fit when extended into the deep surgical position of the patient's brain, preventing the internal sheath and the external sheath from rotating or falling off.

[0009] The pressurized cleaning pipeline assembly includes a box body connected to one end of a water supply pipe, a main pipeline is opened in the middle of the box body, a secondary pipeline is opened on the top of the box body, a pressing block is elastically provided at the connection point between the main pipeline and the secondary pipeline on the top of the box body, and a pushing block facing the pressing block is elastically provided on the bottom of the box body; water flows into the main pipeline and the secondary pipeline of the box body through the water supply pipe to accumulate, and squeezes the top pressing block downward; when the pressing block moves downward to press the pushing block downward, the water flow accumulated in the main pipeline can be pressurized and sprayed out through the other end of the water supply pipe to clean the internal sheath or surgical cavity.

[0010] Based on the above technical solution, further, the outer sheath and the inner sheath are made of transparent materials as a whole, so as to facilitate observation when penetrating deep into the patient's brain.

[0011] Based on the above technical solution, further, one end of the inner sheath tube away from the second telescopic rod is in the shape of a cone tip protruding outwards.

[0012] Based on the above technical solution, further, a method for using a transparent tubular retractor for deep cranial brain surgery comprises the following steps: S1, insert the conical tip of the inner sheath tube along the outer sheath tube, insert the connecting rod on the second telescopic rod into the connecting hole on the fixed rod, fix the inner sheath tube and the outer sheath tube relatively, and then use the fixing piece to fix the fixed rod and the external serpentine retractor; S2. Insert the retractor as a whole into the surgical site of the patient's brain through the tip of the inner sheath, and then use the snake-shaped retractor to drive the outer sheath to retract and fix the surgical site. After that, the surgery can be performed through the outer sheath without manual grip; S3, the inner sheath is pulled out from the fixed outer sheath so that the doctor can perform deep brain surgery through the through hole of the outer sheath. During the surgery, the fixed rod can be rotated relative to the first telescopic rod by adjusting the snake-shaped retractor, so that the angle of the outer sheath can be adjusted without manually touching it; S4. Connect the end of the water delivery tube away from the tip of the internal sheath tube to the external water delivery device, pressurize and speed up the input water flow through the pressurized cleaning pipeline assembly, and then spray it out through the external sheath tube to clean the tip of the internal sheath tube or the surgical cavity.

[0013] The beneficial effects of the present invention are: 1. By designing a fixed adjustment component, a fixing piece capable of being fixed to an external serpentine retractor is arranged on a rotatable fixing rod to fix the external sheath tube to the serpentine retractor, so that when the external sheath tube is fixed to the cranial surgical site, the fixing rod can be driven to rotate by the serpentine retractor without holding the hand, thereby adjusting the external sheath tube, and the present invention has the advantage of being easy to use.

[0014] 2. By providing a rotatable and adjustable fixing rod on the external sheath and coordinating the telescopic adjustment of the first telescopic rod, the external sheath can be adjusted to a certain extent under the drive of the serpentine retractor, so that the present invention has a larger adjustable range and improves the overall flexibility of the device.

[0015] 3. By setting up a pressurized cleaning pipeline assembly, by inputting a low-flow water flow into the water pipe, the water flowing into the main pipeline and the auxiliary pipeline is pressurized through the pressing block and the pushing block in the box, and then sprayed out through one end of the water pipe close to the tip of the internal sheath tube. This allows the present invention to flush the internal sheath tube or the surgical cavity through the pressurized effect without inputting excessively high-pressure water flow, making the functions of the present invention more comprehensive.

[0016] 4. The overall structure of the present invention is relatively simple, which is convenient for actual production, and the device can be adjusted in combination with the existing serpentine retractor, so that the application scope of the present invention is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A schematic diagram of a three-dimensional structure from another viewing angle of the present invention; Figure 3 It is a front view of the present invention; Figure 4 is a side view of the present invention; Figure 5 is a schematic diagram of the three-dimensional structure of the external sheath; Figure 6 is a cross-sectional view of the external sheath; Figure 7 is a schematic diagram of the three-dimensional structure of the internal sheath; Figure 8 is a cross-sectional view of the inner sheath; Fig. 9 It is a three-dimensional structural schematic diagram of a pressure cleaning pipeline assembly; Fig.10 It is a cross-sectional view of a pressure cleaning pipeline assembly; Fig.11 is a schematic diagram of the three-dimensional structure of the fixing rod; Fig.12 It is a model diagram of the present invention; Fig.13 This is a model diagram of the pressure cleaning pipeline assembly.

[0018] Among them: 1. internal sheath; 2. external sheath; 3. fixed adjustment component; 301. first telescopic rod; 302. second telescopic rod; 303. fixed rod; 304. fixing piece; 305. hinge rod; 306. connecting rod; 307. connecting hole; 308. ball joint fixing plate; 4. water pipe; 5. pressurized cleaning pipeline assembly; 501. box; 502. main pipeline; 503. auxiliary pipeline; 504. pressing block; 505. pushing block; 506. reset spring. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] The inventors have found that the existing retractors for deep cranial and brain surgery have many inconveniences when used. For example, the surgical sheath is inconvenient to operate and has poor steering performance. Assistant doctors are required to hold the retractor and adjust it according to the situation. The manual operation requirements are high, which can easily lead to excessive waste of manpower costs. In addition, some retractors do not meet the required traction force on skin tissue during operation, and the surgical operating space for medical staff is small, which is not conducive to observation and operation.

[0021] Based on the above findings, the present application proposes a transparent tubular retractor for deep cranial brain surgery, which is designed with a fixed adjustment component, by arranging a cooperable and fixed telescopic rod at one end of the external sheath and the internal sheath, and arranging a rotatable and adjustable fixed rod on the telescopic rod of the external sheath, and at the same time, by arranging a fixing part on the fixed rod, the external sheath as a whole is fixed to the serpentine retractor; by designing a pressurized cleaning pipeline component, a water pipe is opened in the tube wall of the external sheath, and a box structure capable of pressurizing the water flow entering the water pipe is arranged at one end near the tip of the external sheath, so that the water flow flowing into the water pipe is pressurized and then sprayed out from one end of the external sheath to clean the tip of the internal sheath or the surgical cavity; it has the advantages of easy use, comprehensive functions, strong flexibility and simple structure.

[0022] See also Figure 1-Figure 4 ,as well as Fig.12 The present application discloses a transparent tubular retractor for deep cranial surgery, comprising an inner sheath tube 1 and an outer sheath tube 2 for retracting the surgical cavity during deep cranial surgery. Figure 5-Figure 8 The inner sheath tube 1 and the outer sheath tube 2 are cylindrical sleeve structures that can be connected to each other. The diameter of the outer sheath tube 2 is slightly larger than the diameter of the inner sheath tube 1, but the overall length of the inner sheath tube 1 is larger than the length of the outer sheath tube 2. The inner sheath tube 1 and the outer sheath tube 2 are made of high-strength transparent plastic and other materials as a whole, so that when the inner sheath tube 1 and the outer sheath tube 2 are inserted into the surgical cavity, it is convenient for the doctor to observe the surgical site. In addition, a smooth conical tip structure is provided at one end of the inner sheath tube 1, so that when the inner sheath tube 1 and the outer sheath tube 2 are implanted in the patient's skull and brain, the tip structure can be used to push away the tissue inside the skull and brain without causing damage to the patient's brain, so as to expose the surgical site to the doctor.

[0023] The outer sheath tube 2 and the inner sheath tube 1 are provided with a fixed adjustment component 3, and the fixed adjustment component 3 includes a first telescopic rod 301 fixed to one end of the outer sheath tube 2 and a second telescopic rod 302 fixed to one end of the inner sheath tube 1, respectively. The first telescopic rod 301 and the second telescopic rod 302 can be made of a plastic material or a metal material with high strength as a whole, and are fixed to the ends of the outer sheath tube 2 and the inner sheath tube 1 that can be nested with each other, that is, the end away from the tip of the inner sheath tube 1 by means of snap connection or the like; the first telescopic rod 301 and the second telescopic rod 302 are multi-section telescopic rod structures, which can be adjusted to a certain length. In some embodiments, the first telescopic rod 301 and the second telescopic rod 302 can also be provided with a limiter at the connection that can be telescopically adjusted to control the telescopic length, and the length of the second telescopic rod 302 is greater than the length of the first telescopic rod 301; A fixing rod 303 is rotatably provided at one end of the first telescopic rod 301 away from the external sheath tube 2, and a fixing piece 304 for fixing to an external serpentine retractor is provided at one end of the fixing rod 303 away from the first telescopic rod 301. Specifically, a spherical cavity is provided at one end of the first telescopic rod 301 away from the external sheath tube 2, and a ball head end of a hinge rod 305 is rotatably provided in the spherical cavity. In some embodiments, a ball joint fixing piece 308 for limiting the ball head end of the hinge rod 305 is also clamped at one end of the spherical cavity, so that the hinge rod 305 can rotate relative to the first telescopic rod 301 without falling off, and the other end of the hinge rod 305 is clamped to the bottom end of the fixing rod 303, that is, the fixing rod 303 can be rotated and adjusted relative to the first telescopic rod 301 under the rotation of the hinge rod 305; See also Fig.11 , a fixing piece 304 is provided at one end of the fixing rod 303 away from the hinge rod 305. In some embodiments, the fixing piece 304 can be regarded as a bolt structure as shown in the figure. During installation, the end of the serpentine retractor used for retraction can be selectively clamped into the installation groove at one end of the fixing rod 303 provided with the bolt structure, and the bolt is tightened until a stable connection and fixing state is formed between the end of the serpentine retractor used for retraction and the fixing rod 303. Generally speaking, the serpentine retractor includes two retraction ends, and the external sheath tube 2 and the internal sheath tube 1 can be fixed at the two retraction ends by the fixing piece 304. When the external sheath tube 2 and the internal sheath tube 1 at the two ends are extended into the patient's skull and retract the surgical site, the retraction area of ​​the surgical site can be adjusted by adjusting the serpentine retractor; By providing a fixing member 304 connected to the serpentine retractor, compared with the existing retraction devices that need to be held and fixed, the present invention can retract and fix the surgical site without holding it, and the retraction area can be adjusted by the serpentine retractor, which can avoid the problem of reduced adjustment accuracy caused by hand-held adjustment, or reduced retraction force due to hand muscle fatigue caused by holding the retraction device for too long, thereby improving the reliability and stability of the present invention.

[0024] In some embodiments, a connecting rod 306 is provided at one end of the second telescopic rod 302 away from the inner sheath tube 1, and a connecting hole 307 matching with the connecting rod 306 is opened in the middle of the fixed rod 303. The second telescopic rod 302 and the first telescopic rod 301 have different lengths, but the cross-sectional areas of the two are the same. Then, when the inner sheath tube 1 and the outer sheath tube 2 are nested with each other, the second telescopic rod 302 and the first telescopic rod 301 are in a fitted state. At this time, the connecting rod 306 on the second telescopic rod 302 is inserted into the connecting hole 307 on the fixed rod 303 connected to the first telescopic rod 301, which can improve the nesting strength between the inner sheath tube 1 and the outer sheath tube 2, and can simultaneously adjust the telescopic lengths of the first telescopic rod 301 and the second telescopic rod 302, thereby improving the usability of the present invention. In addition, when the inner sheath 1 and the outer sheath 2 are in a nested state, the cooperation of the connecting rod 306 and the connecting hole 307 can prevent the hinge rod 305 from rotating, thereby causing the inner sheath 1 and the outer sheath 2 to be out of nesting, which is convenient for insertion into the surgical site inside the patient's skull. When the inner sheath 1 and the outer sheath 2 are inserted into the patient's skull, the inner sheath 1 is pulled out of the outer sheath 2. At this time, the doctor can perform surgery by inserting surgical instruments through the tube hole of the outer sheath 2. At the same time, after the inner sheath 1 is pulled out, the rotation restriction of the hinge rod 305 is released. At this time, the doctor can adjust the angle of the outer sheath 2 through the serpentine retractor according to the needs of the operation.

[0025] In some embodiments, a clamping piece for clamping the patient's skull position can be provided on the external sheath 2, or a clampable groove structure can be provided on the wall of the external sheath 2 to enhance the retraction and fixation effect of the external sheath 2 on the surgical site.

[0026] A water delivery pipe 4 is provided on the wall of the outer sheath tube 2. The water delivery pipe 4 is a cylindrical pipe as a whole. One end of the water delivery pipe 4 starts from the end of the outer sheath tube 2 close to the first telescopic rod 301, and a protrusion structure is provided outwardly along the outer sheath tube 2 to communicate with an external water delivery device. The water delivery pipe 4 extends along the wall of the outer sheath tube 2 and is finally connected to the end of the outer sheath tube 2 close to the tip of the inner sheath tube 1. See also Fig. 9 , Fig.10 as well as Fig.13 The water pipe 4 is provided with a pressurized cleaning pipeline assembly 5, and the pressurized cleaning pipeline assembly 5 includes a box body 501 connected to one end of the water pipe 4 near the tip of the internal sheath tube 1. The box body 501 is a cylindrical structure as a whole, and its cross-sectional diameter matches the diameter of the water pipe 4. In some embodiments, a clamping piece can be optionally provided on the outside of the box body 501, and a clamping hole can be opened on the water pipe 4 to clamp the box body 501 and the water pipe 4. A main pipeline 502 is provided in the middle of the box body 501. The main pipeline 502 can be regarded as a through hole structure with a rectangular cross-section connecting the two ends of the box body 501. However, a right-angle bend is provided in the middle of the main pipeline 502. A secondary pipeline 503 with a rectangular cross-section is provided on the top of the box body 501. One end of the secondary pipeline 503 is perpendicular to the connection point of the starting end of the main pipeline 502, and the other end of the secondary pipeline 503 is perpendicular to the middle bend of the main pipeline 502. The top of the box body 501 is located at the connection point between the main pipeline 502 and the auxiliary pipeline 503, that is, the middle bending point of the main pipeline 502. A pressing block 504 is elastically provided by fixing the return spring 506. The bottom of the box body 501 is elastically provided with a pushing block 505 facing the pressing block 504 by fixing the return spring 506. When the external water delivery equipment inputs water along one end of the water delivery pipe 4, the water flows in along the main pipeline 502 and is diverted at the connection point between the main pipeline 502 and the auxiliary pipeline 503. The pressing block 504 and the pushing block 505 have a certain gap in the initial state, and the top of the pushing block 505 pushes the main pipeline 502 under the action of the return spring 506. The middle of the pipeline 502 is blocked, and part of the water flows into the gap between the pressing block 504 and the pushing block 505 through the main pipeline 502, and accumulates in the middle of the main pipeline 502; at the same time, the water flowing in through the auxiliary pipeline 503 continues to press the pressing block 504 downward, and when the pressing block 504 contacts the pushing block 505, the pushing block 505 can be further pressed downward under the action of the water pressure until the accumulated water flows out from the other side of the middle of the main pipeline 502. At this time, the water flowing out from this end can be regarded as a state of being pressurized by the accumulated water pressure, and is sprayed out from the other end of the box body 501, that is, from the end of the outer sheath tube 2 close to the tip of the inner sheath tube 1; In some embodiments, a one-way valve structure can be optionally provided at the connection between the water pipe 4 and the external water supply equipment, that is, to prevent the water flow entering the water pipe 4 from flowing back to the outside from there. When the external water supply equipment stops supplying water to the water pipe 4, the pressure difference generated at both ends of the box body 501 can continuously absorb and spray out the residual water in the water pipe 4. When the water flow in the water pipe 4 is completely sprayed out, the reset spring 506 drives the pressing block 504 and the pushing block 505 to reset, so that the pressurized cleaning pipeline assembly 5 is reset to the initial state as a whole.

[0027] The water flowing into the water pipe 4 is pressurized and then sprayed out by the pressurized cleaning pipe assembly 5, so that the surgical cavity or the tip of the internal sheath 1 can be cleaned. In addition, the pressurized cleaning pipe assembly 5 as a whole pressurizes the input water flow through the cooperation of the water pressure of the water flow itself and the pressing block 504, the pushing block 505 and the return spring 506. There is no need to set up a separate pressurizing device that requires electricity, and the water flow with a low initial flow rate can be pressurized and then sprayed out, which can improve the functionality of the present invention while reducing energy consumption.

[0028] A method for using a transparent tubular retractor for deep cranial surgery comprises the following steps: S1, insert the conical tip of the inner sheath tube 1 along the outer sheath tube 2, insert the connecting rod 306 on the second telescopic rod 302 into the connecting hole 307 on the fixing rod 303, so that the inner sheath tube 1 and the outer sheath tube 2 are nested and fixed to each other, and then use the fixing member 304 to fix the fixing rod 303 and the external serpentine retractor; S2, slowly insert the retractor as a whole into the patient's cranial surgical site through the tip of the inner sheath 1, and then use the snake-shaped retractor to drive the outer sheath 2 to retract and fix the surgical site. After that, the doctor can perform surgery through the outer sheath 2 without manual grip; S3, the inner sheath tube 1 is pulled out from the fixed outer sheath tube 2, so that the doctor can perform deep brain surgery through the through hole of the outer sheath tube 2. During the surgery, the fixed rod 303 can be rotated relative to the first telescopic rod 301 by adjusting the snake-shaped retractor, so as to adjust the angle of the outer sheath tube 2 without manually touching it; S4. Connect the end of the water delivery tube 4 away from the tip of the internal sheath tube 1 to the external water delivery equipment, pressurize and speed up the input water flow through the pressurized cleaning pipeline assembly 5, and then spray it out through the external sheath tube 2 to clean the tip of the internal sheath tube 1 or the surgical cavity. Clinical application cases

[0029] Before performing deep cranial surgery on a patient, the inner sheath tube 1 is first inserted into the outer sheath tube 2 along the tip, and rotated and adjusted until the connecting rod 306 can be inserted into the connecting hole 307, so that the inner sheath tube 1 and the outer sheath tube 2 form a nested structure; Through the fixing piece 304, the two sets of external sheath tubes 2 are respectively fixedly connected to the two ends of the serpentine retractor, and then according to the surgical site, the internal sheath tube 1 and the external sheath tube 2 are slowly inserted into the deep part of the brain through the tip of the internal sheath tube 1, and then the serpentine retractor is adjusted so that the external sheath tube 2 retracts and fixes the surgical site. At this time, the serpentine retractor is locked to fix the external sheath tube 2 to the surgical site; The inner sheath tube 1 is slowly pulled out from the outer sheath tube 2, and the surgical instrument is inserted from the middle through hole of the outer sheath tube 2 to perform a minimally invasive surgery deep in the brain. During the operation, the retraction area or the angle of the outer sheath tube 2 can be adjusted by adjusting the snake-shaped retractor without touching the outer sheath tube 2. Start the external water supply equipment, input water from one end of the water supply pipe 4 into the box 501, and after the water is pressurized by the pressurized cleaning pipeline assembly 5, it is sprayed out from one end of the external sheath 2 to clean the surgical cavity, or when the internal sheath 1 and the external sheath 2 are in a nested state, clean the end of the internal sheath 1 near the tip.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A transparent tubular retractor for deep cranial surgery, comprising an inner sheath tube (1) and an outer sheath tube (2) for retracting the surgical cavity during deep cranial surgery, characterized in that: The outer sheath tube (2) and the inner sheath tube (1) are provided with a fixed adjustment component (3), the outer sheath tube (2) is provided with a water pipe (4), and the water pipe (4) is provided with a pressurized cleaning pipeline component (5).

2. A transparent tubular retractor for deep brain surgery according to claim 1, characterized in that: The fixed adjustment assembly (3) comprises a first telescopic rod (301) fixed to the external sheath tube (2) and a second telescopic rod (302) fixed to the internal sheath tube (1); a fixed rod (303) is rotatably provided at one end of the first telescopic rod (301) away from the external sheath tube (2); and a fixing member (304) for fixing to an external serpentine retractor is provided at one end of the fixed rod (303) away from the first telescopic rod (301).

3. A transparent tubular retractor for deep brain surgery according to claim 2, characterized in that: A connecting rod (306) is provided at one end of the second telescopic rod (302) away from the inner sheath tube (1), and a connecting hole (307) matching with the connecting rod (306) is provided in the middle of the fixed rod (303).

4. A transparent tubular retractor for deep brain surgery according to claim 1, characterized in that: The pressurized cleaning pipeline assembly (5) comprises a box (501) connected to one end of a water delivery pipe (4); a main pipeline (502) and a secondary pipeline (503) that are connected to each other are provided in the box (501); a pressing block (504) is elastically provided at the top of the box (501) at the connection between the main pipeline (502) and the secondary pipeline (503); and a pushing block (505) is elastically provided in the box (501) and is opposite to the pressing block (504).

5. The transparent tubular retractor for deep brain surgery according to claim 1, characterized in that: The outer sheath tube (2) and the inner sheath tube (1) are both made of transparent materials.

6. A transparent tubular retractor for deep brain surgery according to claim 1, characterized in that: One end of the inner sheath tube (1) is in the shape of a protruding conical tip.

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