CN220385174U - Disposable mucous membrane stripping knife - Google Patents

Abstract

The application discloses disposable mucous membrane stripping knife, including operating unit, electrode holder subassembly, swivelling joint subassembly, outer tube subassembly, electrically conductive steel wire, tool bit, notes liquid pipe, electrically conductive steel wire and notes liquid pipe all set up in outer tube subassembly. The disposable mucous membrane stripping knife disclosed by the application is provided with the stripping knife and the liquid injection function simultaneously, so that bleeding points can be quickly washed in the operation process, and mucous membrane swelling liquid can be timely supplemented without withdrawing the stripping knife, so that the operation of medical staff is greatly facilitated.

Description

Disposable mucous membrane stripping knife

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a disposable mucous membrane stripping knife.

Background

With the development of endoscopic techniques in recent years, endoscopic tissue biopsy, endoscopic mucoectomy (Endoscopic mucosal resection, EMR), endoscopic mucosae dissection (Endoscopic submucosal dissection, ESD) have been widely used, and are becoming the treatment of hemorrhage of the digestive tract, polypectomy, and early cancer. Among these, endoscopic submucosal dissection in particular plays a key role in the discovery, diagnosis and excision of early cancers.

Endoscopic submucosal dissection refers to endoscopic minimally invasive techniques that utilize high frequency instruments to submucosally dissect lesions larger than 2 cm. The technique realizes the whole excision of larger lesions and provides accurate pathological stage diagnosis for the lesions. Compared with the traditional surgery, the endoscopic submucosal dissection can better keep the physiological function of the digestive tract on the basis of radically curing tumors, obviously improve the postoperative life quality of patients, and is currently the first choice treatment method for early cancers and precancerous lesions of the digestive tract including esophagus.

The surgical procedure for endoscopic submucosal dissection is cumbersome, generally time consuming, and requires endoscopic guided procedures. The endoscope firstly enters a human body to find pathological tissues, the instrument enters the human body through an endoscope forceps channel to perform pathological change marking, the instrument is withdrawn after marking, the submucosal injection is performed by using an injection needle, the operation is performed by using a proper electric incision knife after the injection, the early cancer pathological change of about 3cm can be successfully excised after about 1-2 hours, and then pathological analysis is performed on the excised specimen. Because of the large area of the resected mucosa in endoscopic submucosal dissection, the surgery is time consuming and the risk of complications such as bleeding, perforation and the like is high.

In the prior art, the traditional disposable mucous membrane stripping knife does not have the function of injecting liquid, and can not quickly wash bleeding points in the operation process. In addition, when the operation time is long and the mucosa swelling liquid medicine is gradually absorbed by a human body, the stripping knife is required to be withdrawn first, and then the mucosa swelling liquid medicine is replenished, so that the operation is complicated.

Disclosure of Invention

In view of the defects in the prior art, the utility model provides a disposable mucous membrane stripping knife which has stripping and liquid injection functions, and can flush bleeding points or supplement mucous membrane swelling liquid medicines through the liquid injection function in the operation process.

In order to achieve the above object, the present utility model provides the following technical solutions:

a disposable mucosal peeling knife comprising: an operation assembly formed with a first accommodation chamber; the electrode seat assembly is provided with a second accommodating cavity, an electrode connecting part, an operation connecting part, a rotary connecting part and an electrode arranged on the electrode connecting part are respectively arranged on the electrode seat assembly, the operation connecting part is connected with the operation assembly, and the electrode connecting part is connected with the high-frequency energy generator; the rotary connecting assembly is provided with a third accommodating cavity, the rotary connecting assembly is respectively provided with a liquid injection connecting part, an electrode seat connecting part and an outer tube connecting part, the liquid injection connecting part is connected with the liquid injection device, and the electrode seat connecting part is rotatably connected with the rotary connecting part of the electrode seat assembly; the outer tube assembly is provided with a fourth accommodating cavity, and the proximal end of the outer tube assembly is rotatably connected with the outer tube connecting part of the rotary connecting assembly; the proximal end of the conductive steel wire is movably arranged in the first accommodating cavity of the operation assembly, and the distal end of the conductive steel wire respectively penetrates through the second accommodating cavity of the electrode seat assembly, the third accommodating cavity of the rotary connecting assembly and the fourth accommodating cavity of the outer tube assembly and is in extension arrangement in the fourth accommodating cavity of the outer tube assembly; the conductive steel wire is electrically connected with the electrode; the cutter head is connected with the distal end of the conductive steel wire, receives the power transmitted by the conductive steel wire, and can extend out or retract from the outer tube assembly when the operation assembly moves the conductive steel wire back and forth; the proximal end of the liquid injection pipe is arranged in the third accommodating cavity of the rotary connecting assembly, and the distal end of the liquid injection pipe penetrates through the fourth accommodating cavity of the outer pipe assembly and extends in the fourth accommodating cavity of the outer pipe assembly; the proximal end of the filler tube may receive the liquid injected by the filler device and transfer the liquid to the distal end of the filler tube.

Preferably, the operation assembly, the operation connection part and the rotation connection part of the electrode holder assembly, and the electrode holder connection part and the outer tube connection part of the rotation connection assembly are coaxially arranged.

Preferably, the operating assembly comprises: the operation handle comprises a handle part and a first ring part connected with the handle part; the handle part is provided with a sliding groove which extends from the proximal end face to the distal end of the handle part along the axial direction and penetrates through the surfaces on two sides of the handle part in the radial direction; the operation bracelet comprises a middle part and second bracelet parts respectively arranged at two sides of the middle part; the middle part of the operation handle ring can be sleeved outside the handle part; the wire traction piece can be used for inserting and connecting the proximal ends of the conductive wires; the bottom of the steel wire traction piece is contacted with the sliding groove through a plane to form a slide rail surface, two sides of the steel wire traction piece are connected with the middle part, and the steel wire traction piece can move back and forth along the sliding groove under the drive of the middle part.

Preferably, the two sides of the steel wire traction piece are respectively provided with a buckle, the corresponding position of the middle part is provided with a clamping groove, and the buckle can be clamped with the clamping groove.

Preferably, a guide empty groove and a limit groove are respectively arranged along the axial position of the steel wire traction piece, a limit pipe is arranged at the proximal end of the conductive steel wire, and the limit pipe drives the conductive steel wire to be inserted from the guide empty groove and enter the limit groove so as to be connected with the steel wire traction piece.

Preferably, the operation assembly further comprises a wire fixing member through which the conductive wire is inserted in an axial direction of the wire fixing member, and the wire fixing member is inserted into the sliding groove and connected with a distal end of the sliding groove.

Preferably, the rotary connecting piece further comprises a rotary fixing piece, a gasket and a partition piece, and the rotary fixing piece, the gasket and the partition piece are sequentially and coaxially inserted into a third accommodating cavity of the rotary connecting piece and connected with the rotary connecting piece; the separator is provided with a conductive wire channel through which the conductive wire can pass.

Preferably, the outer tube assembly comprises an outer tube connecting tube, an outer tube and an outer tube protecting tube assembly, wherein the proximal end of the outer tube connecting tube is rotatably connected with the outer tube connecting part of the rotary connecting assembly, the distal end of the outer tube connecting tube is connected with the proximal end of the outer tube, and the distal end of the outer tube is connected with the outer tube protecting tube assembly.

Preferably, the outer tube protection tube assembly comprises an outer tube protection tube, an insulating head and a chuck tube; the outer pipe protecting pipe is spun outside the outer pipe, and the insulating head and the chuck pipe are accommodated in the outer pipe protecting pipe; the insulating head is provided with a containing cavity for inserting the proximal end of the cutter head, the periphery of the insulating head is provided with a side groove along the axial direction, and the side groove can contain the liquid injection pipe; the chuck tube is connected with the distal end of the conductive steel wire and the proximal end of the cutter head respectively to realize the electric connection of the conductive steel wire and the cutter head.

Preferably, the insulating head includes a narrow portion and a wide portion communicating with the narrow portion, and a side groove is provided at an outer periphery of the wide portion.

The mucous membrane stripping knife with the liquid injection function can spray liquid to clean bleeding points on one hand, and can timely supplement mucous membrane swelling liquid medicine under the condition that the mucous membrane swelling liquid medicine is gradually absorbed by a human body due to long operation time on the other hand. The stripping knife with the liquid injection function can timely supplement the mucosa swelling liquid without withdrawing the stripping knife, thereby greatly facilitating the operation of medical staff.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a perspective view of a disposable mucoadhesive tape knife in accordance with an embodiment of the present utility model.

Fig. 2 is an exploded view of a disposable mucoadhesive tape knife according to an embodiment of the present utility model.

Fig. 3 is another exploded view of a disposable mucoadhesive tape knife in accordance with an embodiment of the present utility model.

Fig. 4 is a diagram showing the construction of an operation assembly of the disposable mucosa peeling knife according to the embodiment of the present utility model.

Fig. 5 is a schematic diagram showing the separation of the operating bracelet and the wire retractor of the disposable mucosa peeling knife according to the embodiment of the present utility model.

Fig. 6 is a schematic view showing the separation of the wire pulling member and the conductive wire of the disposable mucosa peeling knife according to the embodiment of the present utility model.

Fig. 7 is a schematic diagram showing separation and connection between the conductive steel wire and the electrode in the disposable mucosa peeling knife according to the embodiment of the utility model.

Fig. 8 is a cross-sectional view of a rotatable connection assembly of a disposable mucoadhesive tape knife in accordance with an embodiment of the present utility model.

Fig. 9 is a diagram showing the construction of an outer tube assembly of a disposable mucosa peeling knife in an embodiment of the utility model.

Fig. 10 is a schematic view showing a surgical procedure of the disposable mucosa peeling knife according to the embodiment of the present utility model. Wherein (a) is injecting a liquid into the lesion to bulge the tissue; (b) is a dotting mark; (c) is a peeling mucosa; (d) removal for excision; (e) is a pathological specimen.

Detailed Description

The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of embodiments of the present utility model with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the utility model.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in order to simplify the drawings.

In the embodiment of the present utility model, the "proximal" refers to an end close to the operator, and the "distal" refers to an end far from the operator.

According to one general technical concept of the present utility model, there is provided a disposable mucosa peeling knife comprising: an operating assembly formed with a first accommodation chamber; the electrode seat assembly is provided with a second accommodating cavity, an electrode connecting part, an operation connecting part, a rotary connecting part and an electrode arranged on the electrode connecting part are respectively arranged on the electrode seat assembly, the operation connecting part is connected with the operation assembly, and the electrode connecting part is connected with the high-frequency energy generator; the rotary connecting assembly is provided with a third accommodating cavity, the rotary connecting assembly is respectively provided with a liquid injection connecting part, an electrode seat connecting part and an outer tube connecting part, the liquid injection connecting part is connected with a liquid injection device, and the electrode seat connecting part is rotatably connected with the rotary connecting part of the electrode seat assembly; an outer tube assembly forming a fourth receiving cavity, a proximal end of the outer tube assembly rotatably connected to an outer tube connection portion of the rotary connection assembly; the proximal end of the conductive steel wire is movably arranged in the first accommodating cavity of the operation assembly, and the distal end of the conductive steel wire respectively penetrates through the second accommodating cavity of the electrode seat assembly, the third accommodating cavity of the rotary connecting assembly and the fourth accommodating cavity of the outer tube assembly and is in extension arrangement in the fourth accommodating cavity of the outer tube assembly; the conductive steel wire is electrically connected with the electrode; the cutter head is connected with the distal end of the conductive steel wire, receives power transmitted by the conductive steel wire, and can extend out or retract from the outer tube assembly when the operation assembly moves the conductive steel wire back and forth; the proximal end of the liquid injection pipe is arranged in the third accommodating cavity of the rotary connecting assembly, and the distal end of the liquid injection pipe penetrates through the fourth accommodating cavity of the outer pipe assembly and is arranged in an extending mode in the fourth accommodating cavity of the outer pipe assembly; the proximal end of the filler tube may receive the liquid injected by the filler device and transmit the liquid to the distal end of the filler tube.

Fig. 1 illustrates a perspective view of a disposable mucoadhesive removing knife according to an exemplary embodiment of the present utility model.

As shown in fig. 1, in the embodiment of the present utility model, the disposable mucosa stripping knife comprises an operation assembly 110, an electrode holder assembly 120, a rotary connection assembly 130, an outer tube assembly 140, a conductive wire 150, a knife head 160 and a liquid injection tube 170.

As shown in fig. 2 to 3, in the embodiment of the present utility model, the operation assembly 110 is connected with the electrode holder assembly 120. The operating assembly 110 is formed with a first receiving cavity in which the conductive wire 150 is slidably disposed. The conductive wire 150 is slidably moved back and forth by the operation of the assembly 110, thereby driving the cutter head 160 connected to the conductive wire 150 to move back and forth.

As shown in FIG. 2, in some preferred embodiments, the operating assembly 110 includes an operating handle 111, an operating bracelet 112, and a wire pulling member 113.

As shown in fig. 2 and 4, the operation handle 111 includes a handle portion 111a and a first finger ring portion 111b connected to the handle portion 111 a. The handle portion 111a is provided with a slide groove 111c, and the slide groove 111c extends in the axial direction from the proximal end face to the distal end of the handle portion 111a, and penetrates both side surfaces of the handle portion 111a in the radial direction. The sliding groove 111c is used for inserting the wire traction member 113, and the wire traction member 113 moves back and forth along the axial direction of the sliding groove 111c under the driving of the middle portion 112a of the operating bracelet 112. The first ring portion 111b is for finger to pass through for gripping, and may be a ring portion suitable for thumb gripping as an example.

As shown in fig. 5, the operation bracelet 112 includes a middle portion 112a and second bracelet portions 112b respectively provided on both sides of the middle portion 112 a. The intermediate portion 112 may be integrally sleeved outside the handle portion 111a, that is, the intermediate portion 112 is formed with an inner cavity into which the handle portion 111a may be inserted. The intermediate portion 112a is provided to be sleeved outside the handle portion 111a, so that the intermediate portion 112a (or the operation bracelet 112) can move back and forth along the outside of the handle portion 111 a. The second ring portion 112b is used for finger passing for holding, and may be, for example, ring portions adapted for holding of an index finger and a middle finger, respectively.

As shown in fig. 6, wire pulling member 113 may be used to insert and attach the proximal ends of conductive wires 150. As an example, guide empty grooves 113a and limit grooves 113b are provided along the axial position of the wire drawing member 113, respectively. The guide recess 113a and the limit recess 113b are connected to each other, and the width of the guide recess 113a is narrower than the width of the limit recess 113b. The proximal end of the conductive wire 150 is provided with a limiting tube 151, and the limiting tube 151 can be inserted into the limiting groove 113b from the guiding hollow groove 113a, so that the conductive wire 150 is connected through the limiting groove 113b, and the guiding hollow groove 113a plays a role in guiding the conductive wire 150. The wire pulling member 113 may be made of plastic or other elastic material, so as to facilitate insertion of the conductive wire 150 provided with the limiting tube 151. After the wire traction member 113 is fixedly connected with the conductive wire 150 through the limiting tube 151, the wire traction member 113 can synchronously drive the conductive wire 150 to move forward and backward when moving forward and backward.

The two sides of the wire drawing member 113 are respectively connected with the middle part 112 of the operation bracelet 112, so that the wire drawing member 113 can synchronously move back and forth under the driving of the operation bracelet 112. As an example, as shown in the drawing, two sides of the distal end position of the wire drawing member 113 are respectively provided with a clamping block 113c, and the clamping block 113c can be clamped with a clamping groove 112c provided at a corresponding position of the middle portion 112a, so that the wire drawing member 113 is connected with the middle portion 112a (or the operation bracelet 112), when the middle portion 112a of the operation bracelet 112 moves back and forth, the wire drawing member 113 is driven to move back and forth, and then the conductive wire 150 and the cutter head 160 connected with the conductive wire 150 are driven to move back and forth. More preferably, clamping blocks 113c may be respectively disposed at the proximal end and the distal end of the wire drawing member 150, and clamping grooves 112c that are clamped with the clamping blocks 113c may be respectively disposed at corresponding positions of the middle portion 112a, so as to further improve the reliability of the connection between the wire drawing member 113 and the middle portion 112. The latch 113c and the latch groove 112c are elastically caught by the plastic member, thereby restricting the moving direction in the axial direction and the radial direction. The steel wire traction piece 113 is connected with the middle part 112a of the operation bracelet 112, so that the steel wire traction piece can move back and forth under the drive of the operation bracelet 112; the wire drawing member 113 may be inserted into the sliding groove 111c, and the wire drawing member 113 and the sliding groove 111c form a slide rail surface through plane contact so that a sliding direction of the wire drawing member 113 does not deviate from an original sliding track.

In the operating unit 110 according to the embodiment of the present utility model, the sliding groove 111c is provided in the handle portion 111a, the intermediate portion 112a is sleeved outside the handle portion 111, and the wire drawing member 113 is inserted into the sliding groove 111c. One end of the steel wire traction piece 113 is connected with the middle part 112, so that the synchronous front-back movement with the operation bracelet 112 is realized; the wire drawing member 113 is inserted into the sliding groove 111c, whereby the wire drawing member 113 can be synchronously moved back and forth under the movement of the operation bracelet 112 to thereby achieve drawing of the conductive wire 150. The operation assembly provided by the embodiment of the utility model has a simple structure, and is also beneficial to operators to implement the operation of moving the conductive steel wire back and forth.

As shown in fig. 2 and 3, in some preferred embodiments, the operating assembly 110 further includes a wire fixture 114, the wire fixture 114 being configured for insertion of the conductive wire 150 therethrough along an axial direction of the wire fixture 114. The wire fixing member 114 is insertable into the sliding groove 111c of the handle portion 111a and is disposed at a distal end position of the sliding groove 111c. As an example, a stopper tube 151 is provided at the proximal end of the conductive wire 150, and the stopper tube 151 is connected to the conductive wire 150 by welding.

As shown in fig. 2 and 3, in the embodiment of the present utility model, the electrode holder assembly 120 is formed with a second receiving chamber. The electrode holder assembly 120 is provided with an electrode connection part 121, an operation connection part 122, a rotation connection part 123, and an electrode 124 provided at the electrode connection part 121, respectively, wherein the operation connection part 122 is connected with the operation assembly 110, and the electrode connection part 121 is connected with an external device high frequency energy generator. Wherein the electrode connection portion 121 is connected to the electrode 124, and the operation connection portion 122 is connected to the operation member 110, specifically, is connectable to the distal end of the handle portion 111a of the operation member 110. The rotary connection portion 123 is connected to an electrode holder connection portion 132 of the rotary connection assembly 130. The conductive wire 150 may enter the second receiving chamber from the operation coupling portion 122 and extend from the rotation coupling portion 123. After the external device high-frequency power generator is connected to the electrode connection portion 121, the electrode 124 provided in the electrode connection portion 121 receives power supplied from the external device high-frequency power generator and then conducts electricity to the conductive wire 150 in contact therewith. As an example, the two diagrams of fig. 7 show schematic diagrams of connection and disconnection, respectively. As can be seen, the contact ends of the electrodes 124 are provided with through holes through which the conductive wires 150 can be inserted to achieve a contact connection. In some preferred embodiments, open grooves are provided at the contact ends of the electrodes 124 into which the conductive wires 150 can be placed to make electrical connection.

In some preferred embodiments, the rotating connection 123 of the electrode holder assembly 120 is rotatably connected to the electrode holder connection 123 of the rotating connection assembly 130. The rotatable connection allows the rotatable connection assembly 130 to rotate relative to the electrode holder assembly 120, thereby facilitating operation by a healthcare worker. As an example, a boss may be provided at the outer circumference of the rotation connection part 123, a groove may be provided at the inner circumference of the electrode holder connection part 123, and the boss may be inserted into the groove, thereby achieving rotatable connection. As an example, as shown, the three connection portions of the electrode holder assembly 120 may be in a T-shaped arrangement.

As shown in fig. 2 and 3, in the embodiment of the present utility model, the rotary connection assembly 130 is formed with a third receiving chamber. The rotary connection assembly 130 is provided with a liquid injection connection portion 131, an electrode holder connection portion 132, and an outer tube connection portion 133, respectively. Wherein the priming connection 131 is connected to an external priming device (not shown) for receiving a liquid injected by the external priming device. The electrode holder connecting portion 132 is connected to the rotating connecting portion 123 of the electrode holder assembly 120, and after the electrode holder connecting portion 132 is connected to the rotating connecting portion 123, the conductive wire 150 may enter the third accommodating cavity and extend from the rotating connecting portion 123.

As shown in fig. 2 and 8, in some preferred embodiments, the rotary connection assembly 130 further includes a rotary fixture 134, a spacer 135, and a spacer 136. The rotary fixing member 134, the spacer 135 and the partition member 136 are sequentially coaxially inserted into the third receiving chamber and connected to the rotary connection assembly 130, and the partition member 136, the spacer 135 and the rotary fixing member 134 are stacked. By way of example, the swivel mount 134 is threaded and threadably coupled to the swivel assembly 130, and the spacer 136 and the washer 135 are each resiliently coupled to the swivel assembly 130. The rotation fixing member 134 is screw-fixed to the rotation coupling assembly 130, so that the conductive wire 150 is prevented from moving together with the spacer 136 and the spacer 135 due to friction when moving forward and backward in the axial direction. The spacer 136 may be resiliently inserted into the rotating assembly 130 during assembly, then the spacer 135 is inserted, and finally the rotating fixture 134 is inserted.

The separator 136 provides a conductive wire channel through which the conductive wire 150 passes and also provides axial guidance for the conductive wire 150. After passing through the separator 136, the conductive wire 150 passes through the spacer 135, the rotation fixture 134, and then extends to the electrode holder assembly 120. And the filler pipe 170 is not entered into the partition, and is directly connected to the filler neck 131.

The separator 136 is provided with a liquid injection pipe (not shown) and a conductive wire (not shown) respectively, and the two pipes can be used for the liquid injection pipe 170 and the conductive wire 150 to pass through, so that the liquid injection pipe 170 and the conductive wire 150 can be separated and arranged on one hand, and on the other hand, an axial guiding function is also achieved. The liquid filling pipe 170 and the conductive wire 150 respectively pass through the spacer 136, the spacer 135 and the rotary fixing member 134, and then respectively extend to the liquid filling connection portion 131 and the electrode holder assembly 120.

The rotary connection assembly 130 is rotatable relative to the outer tube assembly 140 and the electrode holder assembly 130, and due to the arrangement of the rotary fixing member 134, the spacer 135 and the separator 136, the conductive wire 150 accommodated therein is not twisted while rotating. Because the liquid injection connecting portion 131 of the rotary connecting assembly 130 is connected with the external liquid injection tube of the external liquid injection device, the medical staff may operate the apparatus at different positions, if the external liquid injection tube of the external liquid injection device is not rotatable, the external liquid injection tube of the external liquid injection device is easy to wind, and liquid cannot be injected after the external liquid injection tube is wound, so the rotary connecting assembly 130 is rotatable relative to the outer tube assembly 140 (or the outer tube connecting tube 141 of the outer tube assembly 140) and the electrode holder assembly 130, thereby being convenient for the medical staff to operate in different scenes.

As shown in fig. 2 and 9, in an embodiment of the present utility model, the outer tube assembly 140 is formed with a fourth receiving chamber. The proximal end of the outer tube assembly 140 is connected to the outer tube connection portion 133 of the rotary connection assembly 130, and after the connection, the conductive wire 150 is inserted into the outer tube assembly 140 and extends within the outer tube assembly 140.

In some preferred embodiments, outer tube assembly 140 includes outer tube nipple 141, outer tube 142, and outer tube shield assembly 143. The proximal end of the outer tube nipple 141 is connected to the outer tube connection portion 133 of the swivel connection assembly 130, the distal end of the outer tube nipple 141 is connected to the proximal end of the outer tube 142, and the distal end of the outer tube 142 is connected to the outer tube shield assembly 143. The outer tube 142 is formed with a receiving cavity, and the conductive wire 150 and the filler pipe 170 are respectively disposed to extend in the receiving cavity of the outer tube 142.

In some preferred embodiments, the outer tube shield assembly 143 includes an outer tube shield 143a, an insulating head 143b, a collet tube 143c, the insulating head 143b and collet tube 143c being received within the outer tube shield 143 a. The outer tube protecting tube 143a is outside the outer tube 142 by spinning (rotary press-in), so that the tip of the stripping blade of the present utility model is kept from falling down, while preventing the insulation head 143b from coming out of the outer tube 142 due to axial movement caused by the forward and backward movement of the cutter head 160. The insulating head 143b is provided with a receiving cavity into which a proximal end (e.g., a stem portion) of the bit 160 is inserted. As an example, a side groove is formed in the outer circumference of the insulating head 143b in the axial direction, and the filler neck 170 may be received in the side groove 143b (3), thereby realizing a separate arrangement of the cutter head 160 and the filler neck 170. Since the bit 160 is long, in order to enhance connection reliability, the insulating head 143b may be provided with a narrow portion 143b (1) and a wide portion 143b (2) communicating with the narrow portion 143b (1), wherein the side surface groove 143b (3) is provided at the outer circumference of the wide portion 143b (2). The proximal end of the stem portion of the bit 160 is inserted into the collet tube 143c and then welded thereto, and the proximal end of the collet tube 143c is inserted into the conductive wire and welded thereto. The collet tube 143 can electrically connect the conductive wire 150 and the bit 160, thereby supplying power to the bit 160. The flexible instrument lumen conductive wire 150 has a certain contraction ratio due to the problem of bending in the human body lumen, which can lead to inconsistent extension length of the cutter head 160, and the extension length of the cutter head 160 can be effectively controlled by using the collet tube 143 c. The distal end of the liquid injection tube 170 is engaged with the side groove 143b (3) of the insulating head 143b, and the outer tube 142 is pressed by the outer tube protecting tube 143a to be effectively fixed.

In an embodiment of the present utility model, the conductive wire 150 transmits power to the blade 160 to provide electrical energy for cutting. The proximal end of the conductive wire 150 is slidably disposed in the first receiving cavity of the operating assembly 110, and the distal end of the conductive wire 150 passes through the second receiving cavity of the electrode holder assembly 120, the third receiving cavity of the rotary connection assembly 130, the fourth receiving cavity of the outer tube assembly 140, and extends within the fourth receiving cavity of the outer tube assembly 140, respectively. The proximal end of the conductive wire 150 is connected to the operating assembly 110, the distal end of the conductive wire 150 is connected to the cutter head 160, and the connection of the proximal end to the operating assembly 110 allows the conductive wire 150 to move back and forth under the action of the operating assembly 110, thereby driving the cutter head 160 connected thereto to move back and forth. The conductive wire 150 is contactably connected with the electrode 124.

In an embodiment of the present utility model, a blade 160 is connected to the distal end of the conductive wire 150 to receive power transmitted by the conductive wire 150. The bit 160 may extend or retract from the outer tube assembly 140 as the handle assembly 110 moves the conductive wire 150 back and forth.

In some preferred embodiments, the tool bit is a hook, thulium or one of the common tool bits. The disposable mucous membrane stripping knife can be provided with various knife types for clinical selection according to actual demands.

In an embodiment of the present utility model, the proximal end of the fill tube 170 is disposed within the third receiving cavity of the swivelling coupling assembly 130, and the distal end of the fill tube 170 extends through the fourth receiving cavity of the outer tube assembly 140 and is disposed within the fourth receiving cavity of the outer tube assembly 140. The proximal end of the fill tube 170 may receive fluid injected by an external fluid injection device and transfer the fluid to the distal end of the fill tube 170.

In some preferred embodiments, the operation assembly, the operation connection portion and the rotation connection portion of the electrode holder assembly, and the electrode holder connection portion and the outer tube connection portion of the rotation connection assembly are coaxially disposed.

The method of using the disposable mucosa removal knife of the present utility model will be described in detail with reference to fig. 10. It should be noted that the present utility model is described by way of example only and is not limited thereto.

Because human mucous membrane layer structure divides upper strata, middle level, lower floor and serosa layer, the postoperative person need very careful one deck slowly carry out the tissue separation when peeling off the mucous membrane, and the blood vessel of middle level and lower floor all has the circumstances of cutting bleeding at any time simultaneously, and little blood vessel can have the coagulation function because the stripping knife is connected high frequency, but continuous high frequency is limited to great vessel effect, can not effectively stanch, need to withdraw from the hemostatic forceps of instrument replacement specialty earlier this moment and stanch, and the operation is comparatively loaded down with trivial details. In the operation process, if the stripping knife with the liquid injection function is used, liquid can be injected to wash the bleeding points so as to keep the visual field of the lens clear, and the bleeding point position can be judged, so that the hemostatic operation is facilitated.

The disposable mucous membrane stripping knife enters the body through the natural cavity channel of the human body and the instrument insertion channel of the endoscope, and whether the mucous membrane stripping knife reaches the focus position can be intuitively judged through the lens of the endoscope. Then, the medicine (coloring agent) is sprayed on the focal mucosa by using an injection needle, the range of the focal can be judged, the medicine (swelling agent) is injected under the focal mucosa by using the injection needle to swell the focal position, the operation is convenient, the thulium knife type stripping knife is used for dotting marking (the medicine coloring agent disappears after a long time), and then the hook knife type stripping knife is replaced for pre-cutting stripping.

The mucous membrane stripping knife with the liquid injection function can spray liquid to clean bleeding points on one hand, and can timely supplement mucous membrane swelling liquid medicine under the condition that the mucous membrane swelling liquid medicine is gradually absorbed by a human body due to long operation time on the other hand. The stripping knife with the liquid injection function can timely supplement the mucosa swelling liquid without withdrawing the stripping knife, thereby greatly facilitating the operation of medical staff.

Those skilled in the art will appreciate that the embodiments described above are exemplary and that modifications may be made by those skilled in the art, and that the structures described in the various embodiments may be freely combined without conflict in terms of structure or principle.

Although the present utility model has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate preferred embodiments of the utility model and are not to be construed as limiting the utility model.

Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims (10)

1. A disposable mucosal peeling knife, comprising:

an operating assembly formed with a first accommodation chamber;

the electrode seat assembly is provided with a second accommodating cavity, and is respectively provided with an electrode connecting part, an operation connecting part, a rotary connecting part and an electrode arranged on the electrode connecting part, wherein the operation connecting part is connected with the operation assembly, and the electrode connecting part is connected with a high-frequency energy generator;

the rotary connecting assembly is provided with a third accommodating cavity, the rotary connecting assembly is respectively provided with a liquid injection connecting part, an electrode seat connecting part and an outer tube connecting part, the liquid injection connecting part is connected with a liquid injection device, and the electrode seat connecting part is rotatably connected with the rotary connecting part of the electrode seat assembly;

an outer tube assembly forming a fourth receiving cavity, a proximal end of the outer tube assembly rotatably connected to an outer tube connection portion of the rotary connection assembly;

the proximal end of the conductive steel wire is movably arranged in the first accommodating cavity of the operation assembly, and the distal end of the conductive steel wire respectively penetrates through the second accommodating cavity of the electrode seat assembly, the third accommodating cavity of the rotary connecting assembly and the fourth accommodating cavity of the outer tube assembly and is in extension arrangement in the fourth accommodating cavity of the outer tube assembly; the conductive steel wire is electrically connected with the electrode;

the cutter head is connected with the distal end of the conductive steel wire, receives power transmitted by the conductive steel wire, and can extend out or retract from the outer tube assembly when the operation assembly moves the conductive steel wire back and forth;

the proximal end of the liquid injection pipe is arranged in the third accommodating cavity of the rotary connecting assembly, and the distal end of the liquid injection pipe penetrates through the fourth accommodating cavity of the outer pipe assembly and is arranged in an extending mode in the fourth accommodating cavity of the outer pipe assembly; the proximal end of the filler tube may receive the liquid injected by the filler device and transmit the liquid to the distal end of the filler tube.

2. The disposable mucosa removal tool of claim 1, wherein the handle assembly, the handle connection portion and the swivel connection portion of the electrode holder assembly are coaxially disposed.

3. A disposable mucosae peeler according to claim 1 or 2, characterized in that the operating assembly comprises:

the operation handle comprises a handle part and a first ring part connected with the handle part; the handle part is provided with a sliding groove which extends from the proximal end face to the distal end of the handle part along the axial direction and penetrates through the surfaces on two sides of the handle part in the radial direction;

the operation bracelet comprises a middle part and second bracelet parts respectively arranged at two sides of the middle part; the middle part of the operating bracelet can be sleeved outside the handle part;

the wire traction piece can be used for inserting and connecting the proximal ends of the conductive wires; the bottom of the steel wire traction piece and the sliding groove form a sliding rail surface through plane contact, two sides of the steel wire traction piece are connected with the middle part, and the steel wire traction piece can move back and forth along the sliding groove under the drive of the middle part.

4. A disposable mucous membrane peeling knife according to claim 3 wherein two sides of said steel wire traction member are respectively provided with a buckle, and corresponding positions of said middle portion are provided with a clamping groove, said buckle being capable of being clamped with said clamping groove.

5. The disposable mucosa stripping knife as recited in claim 4, wherein a guide recess and a limit recess are respectively provided along an axial position of said wire pulling member, a limit tube is provided at a proximal end of said conductive wire, said limit tube drives said conductive wire to be inserted from said guide recess and into said limit recess, thereby being connected to said wire pulling member.

6. The disposable mucosa removal tool of any one of claims 3-5, wherein said operating assembly further comprises a wire fixture for insertion of said conductive wire therethrough along an axial direction of said wire fixture, said wire fixture being inserted into said sliding channel and connected to a distal end of said sliding channel.

7. The disposable mucosa removal tool of claim 1 or 2, wherein the rotatable connection assembly further comprises a rotatable fixture, a spacer, and a spacer, the rotatable fixture, the spacer, and the spacer being sequentially coaxially inserted into a third receiving cavity of the rotatable connection assembly and connected to the rotatable connection assembly; the separator is provided with a conductive wire channel through which the conductive wire can pass.

8. The disposable mucosa removal tool of claim 1 or 2, wherein the outer tube assembly comprises an outer tube adapter, an outer tube and an outer tube protector assembly, wherein the proximal end of the outer tube adapter is rotatably connected to the outer tube connection portion of the rotatable connection assembly, the distal end of the outer tube adapter is connected to the proximal end of the outer tube, and the distal end of the outer tube is connected to the outer tube protector assembly.

9. The disposable mucosa removal tool of claim 8, wherein the outer tube guard assembly comprises an outer tube guard, an insulating head and a collet tube; the outer tube protecting tube is spun outside the outer tube, and the insulating head and the chuck tube are accommodated in the outer tube protecting tube; the insulation head is provided with a containing cavity for inserting the proximal end of the cutter head, the periphery of the insulation head is provided with a side groove along the axial direction, and the side groove can contain the liquid injection pipe; the chuck tube is connected with the distal end of the conductive steel wire and the proximal end of the cutter head respectively so as to realize the electric connection between the conductive steel wire and the cutter head.

10. The disposable mucosa removal tool of claim 9, wherein said insulative head comprises a narrow portion and a wide portion in communication with said narrow portion, and wherein a side groove is provided on a periphery of said wide portion.