CN114886544A

CN114886544A - Open type surgical dissector

Info

Publication number: CN114886544A
Application number: CN202210388255.4A
Authority: CN
Inventors: 黄红
Original assignee: Zhuzhou Maowu Medical Technology Co ltd
Current assignee: Zhuzhou Maowu Medical Technology Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-12
Anticipated expiration: 2042-04-14
Also published as: CN114886544B

Abstract

The invention discloses an open type surgical dissector, which belongs to the technical field of surgical medical instruments and comprises a shell, wherein a circuit board is arranged in the shell, a first switch and a second switch are also arranged on the side wall of the shell, a cleaning pipe and a knife cylinder are arranged in the shell, the knife cylinder is sleeved outside the cleaning pipe and is electrically connected with the circuit board, and a rotating device and a deviation device which are connected with the knife cylinder are also arranged in the shell; the offset device is suitable for controlling the cutter barrel to offset along the axis direction of the cleaning pipe; the rotating device is suitable for controlling the cutter barrel to rotate; one end of the knife cylinder close to the functional port extends to be provided with an electrotome assembly. The scheme is through the knife cylinder of cover establishing in the clearance pipe outside, can be at the free activity under biasing means and rotating device's control to this relative position of control electrotome and clearance pipe (traditional adsorption tube promptly), therefore when using, can freely control the electrotome position, the practicality is strong, suitable using widely.

Description

Open type surgical dissector

Technical Field

The invention relates to the technical field of medical instruments for operations, in particular to an open type operation dissector.

Background

An electrotome is an important tool widely used in surgical operations for performing electrocoagulation and electrosection, and has the advantages of less bleeding and high efficiency compared with the conventional scalpel, and thus has become a necessary instrument for many surgeons. However, during the process of cutting separation (electrosection) and/or hemostasis (electrocoagulation) using an electrotome, smoke is often generated, interfering with the surgical field. In addition, blood and debris generated during the procedure can also affect the procedure. To remove this smoke, blood and debris, a suction or flush cleaning is required, synchronized with the electric knife, with the aspirator and cleaner.

Originally, the electric knife and the suction apparatus were separated, but they often took up two hands of the surgeon or required two persons to operate, which made the operation cumbersome, and in addition, the use of a separate suction apparatus made the precise positioning of the operation difficult.

Therefore, a surgical dissector integrating an electric knife and an aspirator into a whole so as to have electric cutting, electric coagulation and suction functions is invented, and the two main types of the existing surgical dissectors are provided, namely the electric knife is directly arranged on an adsorption tube, and the negative pressure formed at the adsorption tube is used for cleaning while the electric cutting is carried out;

the second type is to arrange the electric knife inside the cleaning tube and adjust the relative position of the electric knife and the adsorption tube through the offset mechanism, and the dissector has the problems that the electric knife built in the cleaning tube cannot rotate, so when the electric knife needing different angles such as scraping, pushing and peeling is detected to be in operation, the relative position of the dissector and the doctor hand needs to be adjusted (namely, the doctor needs to rotate the dissector to the proper position and then scrapes, pushes and peels), because the dissector can be communicated with equipment such as smoking and flushing through a pipeline, the adjusted operation can drive the pipeline to be offset in actual use, the operation is influenced, the dissector is inconvenient to use, and meanwhile, after the position of the doctor and the dissector is adjusted, the electric coagulation and the electric cutting switch are inconvenient to press, and the use is also influenced.

Disclosure of Invention

The invention aims to: provided is an open surgical dissector capable of freely controlling the relative position (front-back relative position, rotation relative position) of an electric knife and a suction tube.

The technical scheme adopted by the invention is as follows:

an open type surgical dissector comprises a shell, wherein a function end and a communication end are respectively arranged on two sides of the shell, a circuit board is arranged in the shell, a first switch and a second switch are further arranged on the side wall of the shell, the first switch is suitable for switching on the electrocoagulation function of the circuit board, the second switch is suitable for switching on the electrotomy function of the circuit board, a communication pipe is arranged on the communication end, and a function port is arranged at the function end; a cleaning pipe is arranged in the shell, one end of the cleaning pipe is communicated with the communicating pipe, and the other end of the cleaning pipe penetrates through the functional port to be freely arranged; a knife cylinder is arranged in the shell, the knife cylinder is sleeved outside the cleaning pipe and is electrically connected with the circuit board, and a rotating device and a shifting device which are connected with the knife cylinder are also arranged in the shell; the offset device is suitable for controlling the cutter barrel to offset along the axial direction of the cleaning pipe; the rotating device is suitable for controlling the cutter cylinder to rotate; and one end of the knife cylinder, which is close to the functional port, extends to form an electric knife assembly. The circuit board, the first switch and the second switch are arranged and used for being electrically connected with the cutter barrel to control electric coagulation and electric cutting of the electric cutter assembly, the cutter barrel is sleeved on the outer side of the cleaning pipe and can freely move under the control of the deviation device and the rotating device to control the relative position of the electric cutter and the cleaning pipe (namely, the traditional adsorption pipe), so that the position of the electric cutter can be freely controlled when the electric cutter is used, the electric cutter is high in practicability and suitable for popularization and use.

Preferably, the electrotome assembly comprises an electrotome and a connecting block, one end of the connecting block is fixedly connected with the knife cylinder, and a clamping groove is formed in the free end of the connecting block; the electrotome is provided with a clamping block matched with the clamping groove. The arrangement of the clamping groove on the connecting block and the clamping block on the electrotome can switch the size or style of the electrotome according to different operations, and the applicability of the device is improved.

Preferably, the rotating device comprises a rotating wheel which is rotatably arranged on the shell, rotating teeth are arranged on the rotating wheel, rotating steps are arranged on the side wall of the knife cylinder, transmission teeth matched with the rotating teeth are arranged on the rotating steps, and one end, far away from the rotating steps, of the rotating wheel penetrates through the shell to be freely arranged. The arrangement of the rotating wheel, the rotating teeth and the transmission teeth ensures that an operator can control the rotation of the electrotome by rotating the outer side of the rotating wheel, and the operation is convenient.

It is worth mentioning that, the rotating step and the transmission gear in the scheme can extend for a preset length along the axis direction of the cleaning pipe, so that the rotating gear and the transmission gear are always in a meshed state in the process of front and back deviation of the knife cylinder.

Preferably, the excursion device includes the skew piece, be provided with the sliding block on the skew piece, follow on the casing lateral wall clearance pipe axis direction be provided with sliding block complex sliding tray, the skew piece sets up the casing outside, the sliding block is kept away from the one end of skew piece still is provided with "U" type ejector pad, be provided with the skew ring on the sword section of thick bamboo lateral wall, the skew ring with "U" type ejector pad cooperation sets up, still be provided with anti-skidding line on the skew piece. The setting of "U" type ejector pad on the skew piece then for with the cooperation of skew ring for the skew operation can not receive a sword section of thick bamboo pivoted influence, the setting of sliding block and sliding tray then is used for injecing the skew track of skew piece, guarantees the result of use, and the setting of antiskid line then can be convenient for operation doctor's operation.

It is worth mentioning that between the sliding block and the sliding groove; between the rotating wheel and the shell, a smaller self-locking force can be set in an actual product through the adjustment of the material and the structure of the rotating wheel, and the uncontrolled deflection of the electric knife in the use process is avoided.

Preferably, the circuit board is electrically connected with a connecting elastic sheet, the connecting elastic sheet is electrically connected with the knife cylinder, and the knife cylinder, the connecting block and the electric knife are electrically connected. The electric connection of connecting shell fragment and sword section of thick bamboo, connecting block, electrotome sets up for transmit the signal of telecommunication to the electrotome by the circuit board, reach the result of use that electricity congeals and electrocision.

It is worth mentioning that the knife cylinder and the surface layer of the connecting block can be provided with insulating layers during actual use, so that the using effect of the electric knife is ensured.

Preferably, still the intercommunication is provided with the circular telegram line on the circuit board, the circular telegram line is worn out the casing and is freely set up, the circular telegram line free end is provided with connects the electric plug. The setting of circular telegram line and electric connection plug is used for supplying power to the circuit board.

Preferably, the free end of the cleaning pipe is hollow and hemispherical, and a plurality of communication ports are formed in the side wall of the free end of the cleaning pipe. Be hollow hemispherical clearance pipe, when removing the cigarette suction, the piece to smog, blood that can the multi-angle is cleared up, improves the clearance effect.

Preferably, one end of the communicating pipe, which is far away from the cleaning pipe, is communicated with a three-way valve. The three-way valve is used for respectively communicating the negative pressure device and the flushing device to respectively clean smoke and flush sundries.

Preferably, in the clearance pipe free end with the coaxial concentrated section of thick bamboo that is provided with of clearance pipe, the one end of concentrated section of thick bamboo with clearance pipe free end fixed connection, the other end of concentrating the section of thick bamboo is provided with draws the material awl section of thick bamboo, draw the material awl section of thick bamboo to follow concentrate a section of thick bamboo tip slope extend outwards extend with clearance intraductal wall fixed connection, draw and be provided with a plurality of auxiliary holes on the material awl section of thick bamboo, draw be provided with on the material awl section of thick bamboo inner wall a plurality of with auxiliary hole complex involution cushion, the involution cushion is applicable to the involution draw the inside orientation of material awl section of thick bamboo draw the outside direction of material awl section of thick bamboo. A section of thick bamboo concentrates, draw the setting of a material awl section of thick bamboo and auxiliary hole and involution cushion, when carrying out negative pressure suction operation, can not cause the influence to the suction process, (smog, blood, and piece can be in proper order through the intercommunication mouth, collect to the assigned position by the suction of clearance pipe behind the auxiliary hole), when needs wash the wound with normal saline, normal saline then can be after the drainage of drawing a material awl section of thick bamboo (involution cushion can involution auxiliary hole this moment), by a small amount of intercommunication mouth of a concentrated section of thick bamboo intercommunication rush out, guarantee the accurate pressure of washing.

It is worth mentioning that the sealing cushion is usually made of silica gel or soft materials with memory function, so as to ensure the use effect.

Preferably, the shell is internally provided with a first locating sleeve and a second locating sleeve, the first locating sleeve is sleeved on the outer side of the cleaning pipe, and the second locating sleeve is sleeved on the outer side of the knife cylinder. The first positioning sleeve and the second positioning sleeve are arranged to fix the cleaning tube and the knife cylinder, and the axial line positions of the cleaning tube and the knife cylinder are positioned to ensure the using effect.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the knife cylinder sleeved on the outer side of the cleaning pipe can freely move under the control of the deviation device and the rotation device, so that the relative position of the electric knife and the cleaning pipe (namely the traditional adsorption pipe) is controlled, therefore, the position of the electric knife can be freely controlled during use, the practicability is strong, and the electric knife is suitable for popularization and use.

2. According to the invention, through the arrangement of the clamping groove on the connecting block and the clamping block on the electrotome, the size or the type of the electrotome can be switched according to different operations, and the applicability of the device is improved.

3. According to the invention, through the hollow hemispherical cleaning pipe, when smoke is removed and sucked, fragments of smoke and blood can be cleaned at multiple angles, and the cleaning effect is improved.

4. According to the invention, through the arrangement of the concentration cylinder, the material guiding conical cylinder, the auxiliary hole and the sealing cushion, when negative pressure suction operation is carried out, the suction process is not influenced, (smoke, blood and debris can be sucked to a specified position and collected by the cleaning pipe after sequentially passing through the communicating port and the auxiliary hole), and when the wound needs to be flushed by physiological saline, the physiological saline can be flushed out through a small amount of communicating ports communicated with the concentration cylinder after being drained by the material guiding conical cylinder (at the moment, the sealing cushion can seal the auxiliary hole), so that the flushing pressure with accuracy is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic cross-sectional view taken along line a-a in fig. 1.

Fig. 3 is an enlarged schematic view of the region B in fig. 1.

Fig. 4 is an enlarged schematic view of region C in fig. 1.

Fig. 5 is an enlarged schematic view of region D in fig. 1.

The labels in the figure are: 1-shell, 2-circuit board, 3-first switch, 4-second switch, 5-communicating pipe, 6-function port, 7-cleaning pipe, 8-knife cylinder, 9-connecting block, 10-electric knife, 11-clamping groove, 12-clamping block, 13-rotating wheel, 14-rotating tooth, 15-rotating step, 16-driving tooth, 17-offset block, 18-sliding block, 19-sliding groove, 20- 'U' -shaped pushing block, 21-offset ring, 22-anti-sliding grain, 23-connecting spring sheet, 24-electrified wire, 25-electrified plug, 26-communicating port, 27-three-way valve, 28-concentrating cylinder, 29-material guiding cone cylinder, 30-auxiliary hole, 31-sealing cushion, 32-first positioning sleeve, 33-second positioning sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

As shown in fig. 1-5, an open type surgical dissector comprises a housing 1, wherein both sides of the housing 1 are respectively provided with a function end and a communication end, a circuit board 2 is arranged in the housing 1, a first switch 3 and a second switch 4 are further arranged on the side wall of the housing 1, the first switch 3 is suitable for connecting the electrocoagulation function of the circuit board 2, the second switch 4 is suitable for connecting the electrotomy function of the circuit board 2, the communication end is provided with a communication pipe 5, and the function end is provided with a function port 6; a cleaning pipe 7 is arranged in the shell 1, one end of the cleaning pipe 7 is communicated with the communicating pipe 5, and the other end of the cleaning pipe 7 penetrates through the functional port 6 to be freely arranged; a knife cylinder 8 is arranged in the shell 1, the knife cylinder 8 is sleeved outside the cleaning pipe 7, the knife cylinder 8 is electrically connected with the circuit board 2, and a rotating device and a deviation device which are connected with the knife cylinder 8 are further arranged in the shell 1; the offset device is suitable for controlling the cutter barrel 8 to offset along the axial direction of the cleaning pipe 7; the rotating device is suitable for controlling the cutter cylinder 8 to rotate; an electric knife 10 assembly extends from one end of the knife cylinder 8 close to the functional port 6; the electric knife 10 assembly comprises an electric knife 10 and a connecting block 9, one end of the connecting block 9 is fixedly connected with the knife cylinder 8, and a clamping groove 11 is formed in the free end of the connecting block 9; the electric knife 10 is provided with a clamping block 12 matched with the clamping groove 11; the rotating device comprises a rotating wheel 13 which is rotatably arranged on the shell 1, rotating teeth 14 are arranged on the rotating wheel 13, a rotating step 15 is arranged on the side wall of the knife cylinder 8, a transmission tooth 16 matched with the rotating teeth 14 is arranged on the rotating step 15, and one end, far away from the rotating step 15, of the rotating wheel 13 penetrates through the shell 1 to be freely arranged; the shifting device comprises a shifting block 17, a sliding block 18 is arranged on the shifting block 17, a sliding groove 19 matched with the sliding block 18 is arranged on the side wall of the shell 1 along the axial direction of the cleaning pipe 7, the shifting block 17 is arranged on the outer side of the shell 1, a U-shaped push block 20 is further arranged at one end, away from the shifting block 17, of the sliding block 18, a shifting ring 21 is arranged on the side wall of the knife cylinder 8, the shifting ring 21 is matched with the U-shaped push block 20, and anti-skid patterns 22 are further arranged on the shifting block 17; the circuit board 2 is electrically connected with a connecting elastic sheet 23, the connecting elastic sheet 23 is electrically connected with the knife cylinder 8, and the knife cylinder 8, the connecting block 9 and the electric knife 10 are electrically connected; an electrified wire 24 is further communicated with the circuit board 2, the electrified wire 24 freely penetrates through the shell 1, and an electrified plug 25 is arranged at the free end of the electrified wire 24; the free end of the cleaning pipe 7 is in a hollow hemispherical shape, and a plurality of communication ports 26 are formed in the side wall of the free end of the cleaning pipe 7; a three-way valve 27 is communicated with one end of the communicating pipe 5 far away from the cleaning pipe 7; a concentration cylinder 28 is coaxially arranged in the free end of the cleaning pipe 7 and the cleaning pipe 7, one end of the concentration cylinder 28 is fixedly connected with the free end of the cleaning pipe 7, the other end of the concentration cylinder 28 is provided with a material guiding conical cylinder 29, the material guiding conical cylinder 29 extends outwards along the end of the concentration cylinder 28 in an inclined manner to be fixedly connected with the inner wall of the cleaning pipe 7, a plurality of auxiliary holes 30 are formed in the material guiding conical cylinder 29, a plurality of sealing cushions 31 matched with the auxiliary holes 30 are arranged on the inner wall of the material guiding conical cylinder 29, and the sealing cushions 31 are suitable for sealing the inner part of the material guiding conical cylinder 29 towards the outer direction of the material guiding conical cylinder 29; still be provided with first position sleeve 32 and second position sleeve 33 in the casing 1, first position sleeve 32 cover is established the clearance pipe 7 outside, second position sleeve 33 cover is established the sword section of thick bamboo 8 outside.

In the use process, firstly, a proper electric knife 10 is selected and fixed on the connecting block 9 through the clamping block and the snap and the clamping groove 11, then, an operator covers one side, close to the communication end, of the shell 1 through a palm, the index finger and the middle finger are respectively placed at the positions of the first switch 3 and the second switch 4, the thumb is placed on the offset block 17, the functional end of the shell 1 is pushed forwards to the operation part, and the operation can be started at the moment.

Firstly, the offset block 17 is pushed forwards, the offset block 17 drives the U-shaped push block 20 to push the knife cylinder 8 to move forwards, when the electric knife 10 is offset to a proper use length, the first switch 3 or the second switch 4 is pressed according to the situation to control the electric coagulation and the electric cutting of the electric knife 10, in the process, the three-way valve 27 is communicated with the communicating pipe 5 and the negative pressure device to suck smoke, blood and debris generated in the operation process to the cleaning pipe 7 and then enter an external collecting area, when the position of the electric knife 10 needs to be adjusted, the position of the electric knife 10 can be adjusted through the offset block 17 and the rotating wheel 13 after the electric knife 10 is withdrawn from the operation position (if the operation visual field is good, partial electric cutting, push stripping and the like can be directly performed at the operation position by rotating the offset block 17), and the electric knife 10 is extended into the operation position again to perform operation after the adjustment.

When the wound needs to be flushed, the communicating pipe 5 and the flushing device can be communicated through the three-way valve 27, and flushing liquid is introduced to flush the designated position.

By last, the operation dissector in this scheme can be convenient for adjust the electrotome position in the use, gives the doctor good operation field of vision, can not influence operation process and operation posture because of the operation of adjusting the electrotome simultaneously, and the practicality is strong, suitable using widely.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an open type operation dissector, includes casing (1), casing (1) both sides are provided with function end and intercommunication end respectively, its characterized in that, be provided with circuit board (2) in casing (1), still be provided with first switch (3) and second switch (4) on the casing (1) lateral wall, first switch (3) are applicable to the switch-on the electricity congeals function of circuit board (2), second switch (4) are applicable to the switch-on the electrotomy function of circuit board (2), wherein:

the communicating end is provided with a communicating pipe (5), and the functional end is provided with a functional port (6);

a cleaning pipe (7) is arranged in the shell (1), one end of the cleaning pipe (7) is communicated with the communicating pipe (5), and the other end of the cleaning pipe (7) penetrates through the functional port (6) to be freely arranged;

a knife cylinder (8) is arranged in the shell (1), the knife cylinder (8) is sleeved on the outer side of the cleaning pipe (7), the knife cylinder (8) is electrically connected with the circuit board (2), and a rotating device and a deviation device which are connected with the knife cylinder (8) are further arranged in the shell (1);

the offset device is suitable for controlling the offset of the cutter cylinder (8) along the axial direction of the cleaning pipe (7);

the rotating device is suitable for controlling the cutter barrel (8) to rotate;

one end of the knife cylinder (8) close to the functional port (6) extends to form an electric knife (10) assembly.

2. The open surgical dissector of claim 1, wherein the electrotome (10) assembly comprises an electrotome (10) and a connecting block (9), one end of the connecting block (9) is fixedly connected with the knife cylinder (8), and the free end of the connecting block (9) is provided with a clamping groove (11); the electric knife (10) is provided with a clamping block (12) matched with the clamping groove (11).

3. The open surgical dissector of claim 1, wherein the rotating means comprises a rotating wheel (13) rotatably disposed on the housing (1), the rotating wheel (13) is provided with rotating teeth (14), the side wall of the knife cylinder (8) is provided with a rotating step (15), the rotating step (15) is provided with transmission teeth (16) matched with the rotating teeth (14), and one end of the rotating wheel (13) far away from the rotating step (15) freely passes through the housing (1).

4. The open surgical dissector of claim 1, wherein the offset means comprises an offset block (17), a sliding block (18) is arranged on the offset block (17), a sliding groove (19) matched with the sliding block (18) is arranged on the side wall of the shell (1) along the axial direction of the cleaning tube (7), the offset block (17) is arranged outside the shell (1), a U-shaped push block (20) is further arranged at one end, away from the offset block (17), of the sliding block (18), an offset ring (21) is arranged on the side wall of the knife cylinder (8), the offset ring (21) is matched with the U-shaped push block (20), and anti-skid threads (22) are further arranged on the offset block (17).

5. The dissector according to claim 2, wherein the circuit board (2) is electrically connected to a connecting spring (23), the connecting spring (23) is electrically connected to the knife cylinder (8), and the knife cylinder (8), the connecting block (9) and the electric knife (10) are electrically connected.

6. The open surgical dissector of claim 1, wherein the circuit board (2) is further provided with an electrifying wire (24) in a communicating manner, the electrifying wire (24) freely passes through the housing (1), and the free end of the electrifying wire (24) is provided with an electrifying plug (25).

7. An open surgical dissector as claimed in claim 1, characterized in that the free end of the cleaning tube (7) is hollow and hemispherical, and that the side wall of the free end of the cleaning tube (7) is provided with a plurality of communication openings (26).

8. An open surgical dissector as claimed in claim 7, characterized in that a three-way valve (27) is provided in communication with the end of the communicating tube (5) remote from the clearing tube (7).

9. An open surgical dissector as claimed in claim 7, characterized in that a concentration cylinder (28) is arranged coaxially with the cleaning tube (7) in the free end of the cleaning tube (7), one end of the concentration cylinder (28) is fixedly connected with the free end of the cleaning tube (7), the other end of the concentration cylinder (28) is provided with a material guiding cone (29), the material guiding cone (29) extends obliquely outwards along the end of the concentration cylinder (28) to be fixedly connected with the inner wall of the cleaning tube (7), a plurality of auxiliary holes (30) are arranged on the material guiding cone (29), a plurality of sealing cushions (31) matched with the auxiliary holes (30) are arranged on the inner wall of the material guiding cone (29), and the sealing cushions (31) are suitable for sealing the inner part of the material guiding cone (29) towards the outer part of the material guiding cone (29).

10. The open surgical dissector of any one of claims 1-9, wherein a first positioning sleeve (32) and a second positioning sleeve (33) are further disposed in the housing (1), the first positioning sleeve (32) is disposed on the outer side of the cleaning tube (7), and the second positioning sleeve (33) is disposed on the outer side of the knife cylinder (8).