CN115530893A - Surgical instrument - Google Patents

Abstract

The invention relates to a surgical operation instrument, and belongs to the field of medical instruments. The surgical instrument is provided with the second liquid inlet and the second liquid outlet on the outer pipe, and liquid is sent to the operation implementation part through the second liquid inlet, the liquid sending channel and the second liquid outlet by forming the liquid sending channel in the gap between the outer pipe and the inner pipe, so that the surgical instrument can realize the liquid conveying to the operation implementation part and the liquid suction of the operation implementation part at the same time, the cleaning efficiency of the operation implementation part is improved, and the number of instruments in the operation is reduced; in addition, the butt joint shell of the surgical operation instrument is detachably connected with the handle assembly, so that the surgical operation instrument is convenient to clean.

Description

Surgical instrument

Technical Field

The invention relates to a surgical operation instrument, and belongs to the field of medical instruments.

Background

A plane cutter belongs to a surgical instrument and mainly has the functions of planing, cutting, trimming and the like on bone tissues and the like of a human body. The surgical site needs to be cleaned before the operation and surgical waste generated during the operation is discharged to the outside of the body, so that liquid is required to clean and clean the surgical site. In the prior art, a liquid reflux cavity and a liquid outlet channel are arranged on a handle of a planer tool, an inner tube of the planer tool is of a hollow structure and is communicated with the liquid reflux cavity, and a channel for pumping out liquid at an operation implementation part is formed by the inner tube, the liquid reflux channel and the liquid outlet channel.

In the operation process, because the surgical residues need to be sucked out through going out liquid channel, among the prior art, surgical residues is earlier implemented the position from the operation and is sucked to liquid backward flow intracavity along with liquid, so, surgical residues can be gathered in the liquid backward flow intracavity, before this planer tool is used again, need wash liquid backward flow chamber earlier, among the prior art, because planer tool's handle formula structure as an organic whole, liquid backward flow intracavity is built-in the handle, and because the built-in motor that has again in the handle, the connection of after section has the cable, so, prior art is comparatively troublesome to liquid backward flow chamber washing.

Disclosure of Invention

The invention aims to provide a surgical instrument which can realize the liquid delivery to a surgical operation implementation part and the liquid suction of the surgical operation implementation part and is convenient to clean.

In order to achieve the purpose, the invention provides the following technical scheme: a surgical instrument, comprising:

a handle assembly including a grip housing;

at least one workhead assembly, wherein one said workhead assembly is selectively mounted on said handle assembly, each said workhead assembly comprising a docking housing removably connected to said grip housing and a cutter mounted on said docking housing, said cutter comprising an interface assembly mounted on said docking housing and a conduit mounted on said interface assembly; the pipeline comprises an outer pipe and an inner pipe arranged in the outer pipe, and a gap is formed between the inner pipe and the outer pipe; a liquid reflux cavity is formed in the butt joint shell, the inner tube is communicated with the liquid reflux cavity, a first liquid outlet positioned in the liquid reflux cavity is formed in the inner tube, a first liquid inlet is formed in one end, inserted into the operation implementation part, of the inner tube, and a liquid outlet channel communicated with the first liquid inlet and the first liquid outlet so as to suck liquid from the operation implementation part to the liquid reflux cavity is formed in the inner tube;

the outer tube insert to the interface module, the second inlet has been seted up on the outer tube, insert in the outer tube and serve to offer the second liquid outlet to the one of operation implementation position, the clearance is in order to feed into the inlet channel to the operation implementation position with liquid for intercommunication second inlet and second liquid outlet.

Further, the number of the working head assemblies is at least two, and the types or the sizes of the cutters of at least two working head assemblies are different.

Furthermore, a second opening is formed in the interface assembly, the second liquid inlet is communicated with the second opening, and the second liquid inlet is a port of one end of the outer pipe inserted into the butt joint assembly or is formed in the circumferential wall of the outer pipe.

Further, the second liquid inlet is directly connected with a liquid feeding device, and the liquid feeding device is positioned outside the holding shell.

Furthermore, a water outlet cavity channel extending along the longitudinal direction of the holding shell is formed in the holding shell, and after the holding shell is in butt joint with the butt joint shell, the liquid backflow cavity is in butt joint with the water outlet cavity channel.

Furthermore, a water inlet cavity channel extending along the longitudinal direction of the holding shell is formed in the holding shell, and after the holding shell is in butt joint with the working head assembly, the liquid inlet channel is in butt joint with the water inlet cavity channel.

Furthermore, a switch for realizing the on-off of the liquid reflux cavity and the water outlet cavity and the on-off of the water inlet cavity and the liquid inlet channel is arranged between the liquid reflux cavity and the water outlet cavity or on the liquid reflux cavity or the water outlet cavity.

Further, an insulating part is arranged on the inner wall of the liquid reflux cavity.

Furthermore, a water outlet communicated with the liquid backflow cavity is formed in the butt joint shell, and liquid in the liquid backflow cavity is sucked out of the butt joint shell through the water outlet.

Further, the flow direction of the liquid in the liquid inlet channel is spiral, or the flow direction of the liquid in the liquid inlet channel is linear.

The invention has the beneficial effects that: according to the surgical operation instrument, the second liquid inlet and the second liquid outlet are formed in the outer pipe, the liquid conveying channel is formed in the gap between the outer pipe and the inner pipe, and the liquid is conveyed to the operation implementation part through the second liquid inlet, the liquid conveying channel and the second liquid outlet, so that the surgical operation instrument can convey the liquid to the operation implementation part and can suck out the liquid of the operation implementation part at the same time, the cleaning efficiency of the operation implementation part is improved, and the number of instruments in the operation is reduced; in addition, the butt joint shell of the surgical operation instrument is detachably connected with the handle assembly, so that the surgical operation instrument is convenient to clean.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to make the technical solutions of the present invention practical in accordance with the contents of the specification, the following detailed description is given of preferred embodiments of the present invention with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a surgical instrument according to an embodiment of the present application;

FIG. 2 is a partial schematic structural view of a handle assembly according to an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic view of a grip housing adapted to the handle assembly of FIG. 2;

FIG. 4 is a schematic view of the grip housing shown in FIG. 3 in another orientation;

FIG. 5 is a cross-sectional view of a portion of the surgical instrument illustrated in FIG. 1;

FIG. 6 is an enlarged view of a portion of FIG. 5;

FIG. 7 is a partial cross-sectional view of the surgical instrument illustrated in FIG. 1 in another orientation;

FIG. 8 is a schematic view of the construction of an inner and outer tube for use in the present application;

FIG. 9 is a schematic structural view of another inner and outer tube for use in the present application;

fig. 10 is a sectional view showing a partial structure of a surgical instrument according to the second embodiment of the present application.

Detailed Description

The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1 in conjunction with fig. 5, a surgical instrument 100 according to an embodiment of the present application is shown as a plane blade, and the surgical instrument 100 includes a handle assembly 10 and a working head assembly 20 detachably connected to the handle assembly 10. In this embodiment, the working head assembly 20 is at least one, and one working head assembly 20 is mounted on the handle assembly 10.

The handle assembly 10 includes a grip housing 11 that performs a gripping function and a motor 2 disposed within the grip housing 11. In this embodiment, the material of the holding shell 11 is metal, and the metal is stainless steel, etc., however, in other embodiments, the material of the holding shell 11 may also be plastic, but is not limited thereto. In other embodiments, the grip housing 11 may also be made of plastic, which is not limited herein. An accommodating cavity 111 is formed in the grip housing 11, and the motor 2 is fixedly accommodated in the accommodating cavity 111. The grip housing 11 has a first mating surface 110 formed thereon. The fixing mode of the motor 2 may be a fastening mode, a threaded mode, an adhesive mode, etc., and is not particularly limited herein, depending on the actual situation. The motor 2 has an output shaft 21 for outputting a rotational force to the working head assembly 20.

The workhead assembly 20 includes a docking housing 12 removably connected to the grip housing 11 and a tool 4 mounted on the docking housing 12. The tool is a working head, and in this embodiment, the docking housing 12 and the holding housing 11 are inserted for easy assembly and replacement. In order to facilitate efficient assembly of the holding shell 11 and the docking shell 12 and improve the stability after assembly, a fool-proof structure and a buckle structure are arranged between the holding shell 11 and the docking shell 12, and the fool-proof structure and the buckle structure are oppositely arranged on two sides of the central axis d-d along the central axis d-d of the holding shell 11.

Specifically, referring to fig. 2 and 4, the fool-proof structure includes a fool-proof groove formed on the grip housing 11 and a fool-proof block formed on the docking housing 12. In this embodiment, the fool-proof blocks include a first fool-proof block 125 and a second fool-proof block 126 arranged in a mirror image manner, and a third fool-proof block 127 located between the first fool-proof block 125 and the second fool-proof block 126. The first fool-proof block 125 and the second fool-proof block 126 are flat blocks, and the planes of the two blocks form an acute angle. The number and position of preventing slow-witted groove correspond the number and the position setting of preventing slow-witted piece, specifically do, prevent that slow-witted groove includes and prevents slow-witted groove 1131, second and prevent slow-witted groove 1132 and the third of preventing slow-witted piece 127 and corresponding the setting with first slow-witted piece 125, second of preventing slow-witted piece 126 and prevent slow-witted groove 1133 with third of preventing slow-witted piece 127 and preventing slow-witted. The ends of the first fool-proof block 125 and the second fool-proof block 126 are arc-shaped surfaces. The third prevention block 127 has a cylindrical structure, and a guide portion is provided at an end thereof. In this embodiment, the first fool-proof block 125, the second fool-proof block 126 and the third fool-proof block 127 are all disposed on the docking housing 12, the first fool-proof groove 1131, the second fool-proof groove 1132 and the third fool-proof groove 1133 are all disposed on the holding housing 11, of course, in other embodiments, the first fool-proof block 125, the second fool-proof block 126 and the third fool-proof block 127 may be disposed on the holding housing 11, the first fool-proof groove 1131, the second fool-proof groove 1132 and the third fool-proof groove 1133 are disposed on the docking housing 12, or a part of the fool-proof block is disposed on the holding housing 11, another part of the fool-proof block is disposed on the docking housing 12, a part of the fool-proof groove is disposed on the holding housing 11, and another part of the fool-proof groove is disposed on the docking housing 12.

Referring to fig. 1, 4 and 7, in the present embodiment, the latching structure includes a hook 128 disposed on the docking housing 12, a slot 114 disposed on the holding housing 11 and cooperating with the hook 128, a button 1291 disposed on the docking housing 12 for unlocking the hook 128 and the slot 114, and a spring 1292 for driving the button 1291 to move upward to reset. Specifically, the docking housing 12 is recessed inward from a rear end surface thereof to form a hook groove (not numbered) extending in an axial direction of the docking housing 12, and the hook 128 is located in the hook groove. The hook 128 has a fixed end (not numbered) fixed to the docking case 12 and a hook end 1281 provided opposite to the fixed end, and a hook portion of the hook end 1281 faces outward. The hook end cooperates with the slot 114 to achieve locking of the grip housing 11 and the docking housing 12. The docking housing 12 is formed with a button slot (not numbered) for receiving the button 1291, which extends in a radial direction of the docking housing 12, and the button slot is in communication with the hooking slot. In the radial direction of the docking housing 12, the button 1291 is located outside the hook 128, the bottom surface of the button 1291 abuts against the upper surface of the hook 128, the top surface of the button 1291 is located outside the docking housing 12, and the spring 1292 abuts between the inner bottom surface of the hook groove and the button 1291.

Referring to fig. 3 to fig. 6, an accommodating cavity 121 for accommodating a part of the cutter 4 and a liquid backflow cavity 123 disposed at one side of the accommodating cavity 121 are disposed in the docking housing 12, and at least a part of the cutter 4 extends into the liquid backflow cavity 123. The mating shell 12 has a second mating surface 120 formed thereon that mates with the first mating surface 110. The second abutting surface 120 is formed at the rear side of the liquid returning cavity 123, and the second abutting surface 120 is opened with an abutting hole 1202 for abutting the motor 2 and the cutter 4. In the present embodiment, the first and second abutting surfaces 110 and 120 are perpendicular to the central axis d-d of the surgical instrument 100 (i.e., the first and second abutting surfaces 110 and 120 are perpendicular to each other, which is approximately the position of the dashed line a-a in fig. 1). In other embodiments, the first and second abutting surfaces 110, 120 are not perpendicular to the central axis d-d of the surgical instrument 100, and form an acute angle smaller than 90 ° (i.e. the first and second abutting surfaces 110, 120 are inclined planes, which are approximately at the positions of the dashed lines b-b in fig. 1. It should be noted that, in other embodiments, the inclined planes may be other angles, such as opposite inclined planes symmetrical to the dashed lines b-b in fig. 1. Most preferably, the first and second abutting surfaces 110, 120 form an acute angle smaller than 50 ° and larger than 30 ° with the central axis d-d of the surgical instrument 100, so as to facilitate the abutting of the abutting housing 12 and the holding housing 11. As mentioned above, the docking housing 12 and the holding housing 11 are connected, and in detail, as shown in fig. 2, a socket 115 is formed in the holding housing 11, the first docking surface 110 is located in the socket 115, and the fool-proof groove and the locking groove 114 are formed in the first docking surface 110. Referring to fig. 4, a plug ring portion 1201 inserted into the plug port 115 is formed on the second docking surface 120 extending rearward, the plug ring portion 1201 abuts against a side surface of the plug port 115 in a circumferential direction, the first fool-proof block 125 and the second fool-proof block 126 are formed by protruding rearward from the plug ring portion 1201, the third fool-proof block 127 and the hook 128 are formed by extending rearward from the second docking surface 120, and the third fool-proof block 127 and the hook 128 are located inside the plug ring portion 1201. The design of preventing slow-witted structure can prevent to dock casing 12, grip casing 11 relative rotation, can prevent to dock casing 12 simultaneously through buckle structure, grip casing 11 and at the axial relative movement to through preventing slow-witted structure and buckle structure and setting up in the both sides of axis d-d relatively, thereby only need design a buckle structure can realize axially fixed. It should be noted that, in the present embodiment, the docking housing 12 and the grip housing 11 are triangular, and the docking housing 12 and the grip housing 11 can be further restricted from rotating relatively by the insertion ring portion 1201 and the side surface of the insertion port 115 abutting in the circumferential direction.

It should be noted that, in this embodiment, the number of the working head assemblies is at least two, the structures and the sizes of the second abutting surfaces 120 of the abutting housings 12 in at least two working head assemblies 20 are the same, and the sizes or the sizes of the cutters 4 of different working head assemblies 20 are different, and due to the different sizes or the sizes of the cutters 4, the sizes and the structures of the assembled liquid return cavities 123 and the assembled accommodating cavities 121 will be different, but since the second abutting surfaces 120 are not changed, different working head assemblies 20 can be detachably connected with the handle assembly 10, so that one handle assembly 10 can be adapted to cutters 4 of different sizes or models (i.e. different specifications), the adaptability of the handle assembly 10 is improved, the sizes of the handle assembly 10 are reduced, and cost saving is facilitated.

Referring to fig. 5 and 6, the tool 4 includes an interface assembly 41 mounted on the docking housing 12 and a conduit mounted on the interface assembly 41. Specifically, the pipe includes an outer pipe 43 and an inner pipe 42 disposed inside the outer pipe 43, and the outer pipe 43 and the inner pipe 42 are disposed in parallel and coaxially. The interface component 41 is partially inserted into the liquid reflux cavity 123, a through hole 410 for communicating the inner tube 42 with the liquid reflux cavity 123 is opened on the interface component 41, and the liquid inside the human body (i.e. the physiological saline containing the human tissue and the blood) is sucked into the through hole 410 along the inner tube 42 and is sucked into the liquid reflux cavity 123 through the through hole 410.

Specifically, the interface assembly 41 further includes a docking head 412 mounted on the docking housing 12 and a plug 413 mounted on the rear side of the docking head 412. Plug 413 is located in liquid reflux chamber 123, and through hole 410 is provided on plug 413. In this embodiment, tool 4 and fluid return lumen 123 are easily cleaned, sterilized, or replaced by a health care provider. The docking head 412 is detachably connected to the docking housing 12, and the plug 413 is detachably connected to the docking head 412. The detachable manner of the plug 413 and the docking head 412 is of conventional design and will not be described in detail here. The rear end of the outer tube 43 is inserted and fixed in the docking head 412, the rear end of the inner tube 42 is inserted and fixed in the docking head 413, the rear end of the inner tube 42 extends into the through hole 410, the front end of the inner tube 42 extends into the outer tube 43, and a gap (not numbered) is formed between the outer tube 43 and the inner tube 42 so that the inner tube 42 can move in the outer tube 43. Meanwhile, in order to make the inner tube 42 operate more smoothly in the outer tube 43 and perform the planing operation, the front ends of the outer tube 43 and the inner tube 42 are the cutter head portions 44, and the cutter head portions 44 may have a tooth shape, and the tooth shape is a tooth-shaped oblique incision, so that the cutter head portions 44 can perform planing, grinding and the like on bone materials more sharply. Alternatively, the blade portion 44 may have other shapes, such as a slant cut, etc., and is not limited thereto, so long as the above purpose is achieved.

When the knife head 44 shaves or grinds the human body organ, the portion is cleaned by using liquid, in order to transport the liquid inside the human body to the outside of the human body, in the embodiment, a water outlet channel 112 is formed in the holding shell 11, the water outlet channel 112 is located at one side of the accommodating cavity 111, and the accommodating cavity 111 is not communicated with the water outlet channel 112. After docking of grip housing 11 and docking housing 12, liquid-return lumen 123 is docked with outlet channel 112. A switch (not shown) for turning on/off the liquid reflux chamber 123 and the water outlet channel 112 is provided between the liquid reflux chamber 123 and the water outlet channel 112, or on the liquid reflux chamber 123 or on the water outlet channel 112. The switch can be a mechanical valve, specifically a water valve, and can also be an electronic valve. Specifically, an extension cavity 1231 is formed in the docking housing 12 and extends backward from the liquid return cavity 123, the liquid return cavity 123 is docked with the water outlet channel 112 through the extension cavity 1231, and the water valve is disposed on the extension cavity 1231.

In the above, the motor 2 and the cutter 4 are butted through the butting hole 1202 (see fig. 4) of the second butting surface 120, that is, after the holding housing 11 and the butting housing 12 are butted, the motor 2 and the cutter 4 are butted through the butting hole 1202, and specifically, the surgical instrument 100 further includes a clamping head 22 mounted on the output shaft 21, and referring to fig. 2, after the holding housing 11 and the butting housing 12 are butted, the clamping head 22 clamps the rear end of the plug 413 through the butting hole 1202 so that the motor 2 drives the inner tube 42 to move. The chuck 22 has a housing cavity 23, and an elastic member (not shown) is disposed in the housing cavity 23, one end of the elastic member is mounted on the output shaft 21, and the other end is mounted with a holding member (not shown). In this embodiment, the elastic member is a compression spring, and the purpose of the compression spring is to: when the plug 413 is plugged with the chuck 22, the abutting piece abuts against the rear end of the plug 413 and moves towards the motor 2 under the action of external force so as to compress the pressure spring; when the working head assembly 20 is detached from the handle assembly 10, the external force applied to the pressure spring is removed, and the pressure spring pushes the abutting piece to move towards the direction away from the motor 2 under the action of the elastic force of the pressure spring, so as to push the working head assembly 20 to move towards the direction away from the motor 2, and further, the working head assembly 20 is rapidly detached from the handle assembly 10.

The cutter 4 and the butt housing 12 are detachably engaged. Specifically, referring to fig. 6, the docking housing 12 is provided with a notch 124, and the tool 4 is provided with a retaining member 418 engaged with the notch 124. Wherein the notch 124 is disposed on the docking housing 12 and communicates with the receiving cavity 121. A catch 418 is provided on the docking head 412. The clamping member 418 and the docking head 412 may be integrally formed or separately formed, and are not particularly limited, depending on the actual situation. Meanwhile, the material of the retaining member 418 may be plastic, which may be slightly deformed under the action of external force, so that the retaining member 418 slides along the accommodating cavity 121 to be engaged with the notch 124. Specifically, the docking head 412 includes a docking member 4121 and a docking sleeve 4122 sleeved on the docking member 4121, the rear end of the outer tube 43 is fixedly inserted into the front end of the docking member 4121, the front end of the plug 413 is inserted into the rear end of the docking member 4121, and the retaining member 418 is disposed on the docking sleeve 4122.

The surgical instrument 100 also includes a control assembly 3 (see fig. 5) that enables operation of the motor 2 through transmission of control signals. The control unit 3 is activated to operate the motor 2 to operate the inner tube 42 of the cutter 4 to perform a cutting action. The control component 3 receives the control signal and realizes the operation of the motor 2 based on the control signal, therefore, a control panel (not shown) for sending the control signal may be further disposed in the docking housing 12, and the control component 3 is electrically connected to the control panel. In other embodiments, the control assembly 3 may control the operation of the motor 2 and may also implement the operation of other components, which are determined according to actual situations and are not specifically limited herein. In the present embodiment, the control component 3 is a switch electrically connected to the motor 2, and the switch 3 may be a push switch or a push switch; indeed, in other embodiments, the switch 3 may be a switch encapsulated by a long-leg insert, or the like. In addition, in other embodiments, the control component 3 may be disposed on the holding shell 11, or the control component 3 may be a separate controller.

The water valve can be a mechanical valve or an electronic valve, and when the water valve is the mechanical valve, the water valve is manually turned off, and when the water valve is the electronic valve, the water valve can be electrically connected with the control assembly 3, so that the control assembly 3 controls the electronic valve to be turned on and off conveniently and quickly. In order to enable the liquid to be smoothly sucked out of the water outlet channel 112, a negative pressure suction device (not shown) for generating negative pressure is connected to one end of the water outlet channel 112, and the negative pressure suction device has a conventional structure, such as a pressure regulator, a suction pump, and the like, and is not limited in particular.

In this embodiment, the control component 3 is mounted on the docking housing 12, the holding housing 11 is formed with a first electrical connection portion electrically connected to the motor 2, the docking housing 12 is formed with a second electrical connection portion electrically connected to the control component 3, and after the holding housing 11 and the docking housing 12 are docked, the first electrical connection portion and the second electrical connection portion are electrically connected. Specifically, referring to fig. 2 and 4, the first electrical connection portion 31 is disposed on the first mating surface 110, and the second electrical connection portion 32 is disposed on the second mating surface 120.

As shown in fig. 5, the inner tube 42 is connected to the liquid reflux cavity 123, the inner tube 42 is provided with a first liquid outlet 45 located in the liquid reflux cavity 123, one end of the inner tube 42 inserted into the operation performing portion is provided with a first liquid inlet 441, and a liquid outlet channel (not numbered) is formed in the inner tube 42 and communicates with the first liquid inlet 441 and the first liquid outlet 45 to suck the liquid from the operation performing portion to the liquid reflux cavity 123. A second liquid inlet 47 is formed on the outer tube 43, a second liquid outlet 442 is formed at one end of the outer tube 43 inserted into the surgical site, and a liquid inlet channel (not numbered) for communicating the second liquid inlet 47 and the second liquid outlet 442 to deliver liquid to the surgical site is formed in a gap between the outer tube 43 and the inner tube 42. It should be noted that the first inlet port 441 and the second outlet port 442 are the cutter head portions 44 of the outer tube 43 and the inner tube 42.

However, in the prior art, the gap between the inner tube 42 and the outer tube 43 is set to be small, so as to prevent the inner tube 42 from shaking due to an excessively large gap, which affects the stability of grinding and cutting, but if the gap is small, the flow rate of the liquid is reduced, so that the amount of the liquid sucked out of the operation site (i.e., the amount of the liquid sucked out) is larger than the amount of the liquid entering the operation site from the gap (i.e., the amount of the liquid delivered), and in order to solve this problem, in the present application, the gap between the inner tube 42 and the outer tube 43 is set to be large so as to ensure the flow rate of the liquid, the gap between the inner tube 42 and the outer tube 43 is set to be small so as to ensure that the inner tube 42 does not shake in the outer tube 43, and the gap between the small portions has the conventional size, and the gap between the large portions is set according to the flow rate of the liquid to be delivered. Specifically, the method comprises the following steps: the flow direction of the liquid in the liquid inlet channel is spiral. In the present embodiment, inner tube 42 and outer tube 43 extend from the axial direction of surgical instrument 100. Referring to fig. 8, the inner tube 42 includes an inner tube wall 421, and the inner tube wall 421 surrounds to form a liquid outlet channel. The inner pipe wall 421 is formed with a plurality of protrusions 422, and recesses 423 are formed between adjacent protrusions 422, in this embodiment, the protrusions 422 are arc-shaped protrusions, the protrusions 422 extend along the axial direction of the inner pipe, and the cross-sectional shape of the outer surface of the inner pipe wall 421 is petal-shaped. Of course, in other embodiments, the protrusion 422 may be twisted around the outer side of the inner pipe wall 421. The cross-sectional shape of the inner cavity of the outer tube 43 is circular, a first gap (not numbered) is formed between the protrusion portion 422 and the inner cavity of the outer tube 43, a second gap (not numbered) is formed between the recess portion 423 and the inner cavity of the outer tube 43, the first gap is smaller than the second gap, the liquid flow rate in the first gap is small, the inner tube 42 can be ensured to rotate stably in the outer tube 43 by the matching between the protrusion portion 422 and the outer tube 43, the liquid flow rate in the second gap is large, and the liquid conveying amount is ensured by the second gap. In other embodiments, the protrusion 422 may be disposed on the inner cavity of the outer tube 43, that is, as long as one of the inner tube 42 and the outer tube 43 is ensured to be provided with the protrusion 422, which can realize smooth movement of the inner tube 42, and a second gap, through which a large flow rate can pass, is also ensured between the inner tube 42 and the outer tube 43.

In fig. 8, the inner tube 42 is rotated in the outer tube 43, so that the flow direction of the liquid is threaded. Indeed, the flow direction of the liquid in the liquid inlet channel may also be linear. See fig. 9, in particular: a fixing ring 40 is arranged between the inner tube 42 and the outer tube 43, a plurality of circular through holes 401 for liquid to flow through are formed in the fixing ring 40, the fixing ring 40 is fixed in the outer tube 43, a certain gap is formed between the fixing ring 40 and the inner tube 42, the gap can ensure the movement stability of the inner tube 42, and the circular through holes 401 in the fixing ring 40 can ensure the flow of the liquid. In fig. 9, since the fixing ring 40 is fixed to the outer tube 43, the inner tube 42 is rotated without affecting the flow direction of the liquid, but of course, the fixing ring 40 may be provided on the inner tube 42, and at this time, the rotation of the inner tube 42 affects the flow direction of the liquid, and the flow direction of the liquid takes a spiral shape.

If the flow rate of the liquid in the gap between the inner tube 42 and the outer tube 43 can satisfy the liquid extraction amount (i.e., the extraction amount is required to be small), the gap between the inner tube 42 and the outer tube 43 can be set to a conventional size.

Referring to fig. 5 and fig. 6, the interface component 41 is provided with a second opening 411, the second inlet 47 is communicated with the second opening 411, and the second inlet 47 is a port of the outer tube 43 or the second inlet 47 is formed on a circumferential wall of the outer tube. Specifically, in the present embodiment, the second liquid inlet 47 is opened in the circumferential wall of the outer tube 43. In other embodiments, the second inlet port 47 is a port of the outer tube 43 facing the interface assembly 41, and the extension length of the inner tube 42 is longer than the extension length of the outer tube 43 relative to the extension length of the outer tube 43, so the second inlet port 47 does not need to additionally open on the circumferential wall of the outer tube 43. The second opening 411 is connected to a liquid feeding device located outside the grip housing. In other embodiments, the second liquid inlet is located outside the interface component 41, that is, the second liquid inlet is located outside the interface component 41, and the interface component is not provided with the second opening 411, at this time, the second liquid inlet is directly connected to the liquid feeding device, and the liquid feeding device is located outside the holding shell. The connection pipe 9 may be inserted and connected between the second opening 411 and the second liquid inlet 47, but it is needless to say that the connection pipe is not provided, and the inner pipe 42 is inserted into the outer pipe 43, but since the sealing member is provided between the plug 413 and the accommodation chamber 121, the liquid in the outer pipe 43 does not flow into the liquid return chamber 123.

In the first embodiment, the water outlet channel 112 is located in the holding housing 11, and the second liquid inlet 47 is connected to the liquid feeding device through the second opening 411. Referring to fig. 10, the surgical instrument of the second embodiment is substantially similar to the surgical instrument of the first embodiment, except that no water outlet channel is provided in the grip housing, and the second inlet port 47 is connected to the fluid delivery device through the second opening 411. Specifically, the docking housing 12 is provided with a water outlet 116 communicated with the liquid backflow cavity 123, and the liquid in the liquid backflow cavity 123 is sucked out of the docking housing 12 through the water outlet 116. In the second embodiment, the water outlet 116 (see fig. 10) is opened below the liquid reflux cavity 123 in the height direction of the surgical instrument 100, so that the liquid is smoothly sucked out of the docking housing 12. To further facilitate the aspiration of fluid out of docking housing 12, surgical instrument 100 further includes an aspiration assembly (not numbered) coupled to water outlet 116. The suction component is the negative pressure aspirator and the like. As mentioned above, the suction assembly can also be electrically connected to the control assembly 3, i.e. the control assembly 3 can control the opening and closing of the suction assembly. The suction assembly is used for generating negative pressure, so that a pressure difference is generated between the inside of the human body and the liquid reflux cavity 123, liquid is sucked into the through hole 46 along the inner tube 42 under the action of the pressure difference and is sucked into the liquid reflux cavity 123 through the through hole 46, and then the liquid in the liquid reflux cavity 123 is sucked out of the docking housing 12 through the water outlet 116 by the suction assembly. The second liquid inlet 47 in the second embodiment may also be disposed outside the interface assembly 41 and directly connected to the liquid feeding device. In order to solve this problem, in other embodiments, an insulating member may be provided on an inner wall of the liquid reflux chamber 123, in order to solve the problem that the holding case 11 and the docking case 12 are generally made of a metal material, and when the water discharge channel 112 is provided in the docking case 12, and the sucked liquid contains an electric ion, the operator is likely to get an electric shock.

In addition to the two embodiments described above, the surgical instrument can be modified as follows: form the water inlet cavity way that extends along the lengthwise direction who grips the casing in gripping the casing, grip the casing and the butt joint of working head subassembly after, inlet channel and water inlet cavity way butt joint, and the structure of embodiment one or the structure of embodiment two can then be adopted to surgical operation instrument's feed liquor mode, promptly: as in the first embodiment, a water outlet channel is provided in the holding housing, or as in the second embodiment, no water outlet channel is provided in the holding housing, and the docking housing 12 is provided with a water outlet 116 communicated with the liquid return cavity 123.

As can be seen from the above description, in practical applications, the following four ways of accessing the liquid of the surgical instrument can be adopted: 1. the holding shell is simultaneously provided with a water outlet cavity channel and a water inlet cavity channel; 2. the holding shell is only provided with a water outlet cavity channel, and the second liquid inlet is connected with the liquid feeding device through a second opening on the interface component or directly connected with the liquid feeding device; 3. the holding shell is only provided with a water inlet cavity channel, and the butt joint shell is provided with a water outlet; 4. the butt joint shell is provided with a water outlet, and the second liquid inlet is connected with the liquid feeding device through a second opening on the interface component or directly connected with the liquid feeding device. It should be noted that, when the holding shell is provided with the water inlet channel, the water inlet channel may be provided with a valve, and the valve may be provided integrally with the valve in the first embodiment, or share one handle portion.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above examples only show several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims (10)

1. A surgical instrument, comprising:

a handle assembly including a grip housing;

at least one workhead assembly, wherein one of said workhead assemblies is selectively mounted on said handle assembly, each said workhead assembly comprising a docking housing removably connected to said grip housing and a cutter mounted on said docking housing, said cutter comprising an interface assembly mounted on said docking housing and a conduit mounted on said interface assembly; the pipeline comprises an outer pipe and an inner pipe arranged in the outer pipe, and a gap is formed between the inner pipe and the outer pipe; a liquid reflux cavity is formed in the butt joint shell, the inner tube is communicated with the liquid reflux cavity, a first liquid outlet positioned in the liquid reflux cavity is formed in the inner tube, a first liquid inlet is formed in one end, inserted into the operation implementation part, of the inner tube, and a liquid outlet channel communicated with the first liquid inlet and the first liquid outlet so as to suck liquid from the operation implementation part to the liquid reflux cavity is formed in the inner tube;

the utility model discloses a surgical operation liquid inlet, including outer tube, interface subassembly, second inlet, second outlet, clearance, first inlet and second outlet, its characterized in that, the outer tube insert to the interface subassembly, the second inlet has been seted up on the outer tube, insert in the outer tube to one of surgery implementation position and seted up the second outlet, the clearance is in order to send into liquid to the inlet channel of surgery implementation position for communicating second inlet and second outlet.

2. The surgical instrument of claim 1, wherein the number of working head assemblies is at least two, and wherein the tools of at least two of the working head assemblies are of different sizes or dimensions.

3. The surgical instrument of claim 2, wherein the interface assembly defines a second opening, the second inlet port is communicated with the second opening, and the second inlet port is a port at an end of the outer tube inserted into the docking assembly or is formed in a circumferential wall of the outer tube.

4. A surgical instrument according to claim 3, wherein the second inlet port is directly connected to a fluid delivery device located externally of the grip housing.

5. The surgical instrument of claim 2, wherein a water outlet channel is formed in the grip housing and extends in a longitudinal direction of the grip housing, and wherein the liquid return channel is in abutment with the water outlet channel when the grip housing and the abutment housing are in abutment.

6. The surgical instrument of claim 5, wherein a water inlet channel is formed in the grip housing and extends in a longitudinal direction of the grip housing, and the liquid inlet channel is in abutment with the water inlet channel when the grip housing and the working head assembly are in abutment.

7. The surgical instrument of claim 6, wherein a switch for switching the liquid reflux cavity and the water outlet cavity and switching the water inlet cavity and the water inlet channel is arranged between the liquid reflux cavity and the water outlet cavity or on the liquid reflux cavity or the water outlet cavity.

8. The surgical instrument of claim 5 wherein insulation is provided on the inner wall of the fluid return lumen.

9. The surgical instrument of claim 2, wherein the docking housing further defines a water outlet in communication with the fluid return lumen, and wherein fluid in the fluid return lumen is drawn out of the docking housing through the water outlet.

10. A surgical instrument according to any one of claims 1 to 9, wherein the direction of flow of the liquid in the inlet channel is helical or the direction of flow of the liquid in the inlet channel is linear.

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