An auxiliary device for minimally invasive surgery

Abstract

The application discloses a kind of auxiliary devices of minimally invasive surgery, including clamping part, locking part, control line, bendable catheter, control part, the rear end of locking part can be further provided with small magnet, control line is formed as passageway by the gap of the inner wall of locking part on the both sides of small magnet, and clamping part is controlled to open and close, open circular groove of the front end of control line is connected with rear end pin, clamping part is locked by link rod when control line moves to rear end, link rod protrusion is clamped into the locking slot of clamping cylinder, then control line is separated from rear end pin, finally control line presses the elastic buckle of spring line front end, so that bendable catheter is separated from clamping cylinder, the auxiliary device can be further attached to spare magnet to improve magnetic force.The minimally invasive surgery auxiliary device of the application can accurately anchor and pull biological tissue, facilitate doctor operation, improve operation efficiency and success rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to an auxiliary device for ESD minimally invasive surgery. BACKGROUND

[0002] At present, in the medical field, the treatment technology of digestive endoscope develops rapidly, the endoscope is used very widely, the endoscopic technology also develops rapidly, and the detection rate of digestive tract lesions is also higher and higher. In the ESD (Endoscopic Submucosal Dissection) operation, the frequency of cutting lesions is also higher and higher. However, when cutting biological tissues, the biological tissues are operated by the external operating handle of the intubation gastroscope. The biological tissues are in a natural state. During the operation of the ESD, the lesion part of the cut upper layer of the mucosa is constantly sinking under the action of gravity, causing the dissection field to become smaller and smaller, which affects the success rate of the ESD operation to some extent. If the biological tissues are not fixed by the clamping and pulling device, it is not easy for the doctor to operate when cutting the biological tissues.

[0003] In view of the above problems, there are products in the current medical device industry that use independent string-shaped magnetic beads to be sleeved on the endoscopic titanium clip, and use external magnetic field traction. However, this product is inconvenient to operate. The doctor needs to send the magnetic beads into the body through the endoscopic channel twice, and then send the titanium clip into the body. Through the operation of the external handle, the biological tissues need to be clamped and the magnetic beads sent into the body are also clamped at the same time, which is equivalent to hanging the magnetic beads on the titanium clip. This kind of product has the following defects. Since the magnetic beads are not permanently fixed with the titanium clip, only when the biological tissues are clamped by the titanium clip, the independent magnetic beads are hung in the closed ring formed by the front segment of the clip. If the doctor operates improperly, the magnetic beads may not be clamped on the titanium clip, and the operation is difficult when the biological tissues are clamped and the magnetic beads are considered at the same time. Moreover, when the size of the biological tissues in the body is large and a large pulling force is needed, it is not convenient to send the magnetic beads into the body multiple times.

[0004] Chinese patent application 2015106619645 discloses an auxiliary device for minimally invasive surgery and a control method thereof, which provides an auxiliary device for minimally invasive surgery for pulling lesions, the auxiliary device for minimally invasive surgery comprising an in-vivo device and an in-vitro device, the in-vitro device comprising an in-vitro magnetic field generating device capable of providing a rotatable magnetic field, and the in-vivo device comprising an in-vivo magnet capable of being connected to the lesion by a fixing method, the in-vivo magnet being capable of moving and / or rotating in response to the change in direction of the rotatable magnetic field of the in-vitro magnetic field generating device, so that the lesion can move at a controllable speed and / or rotate at a controllable angle along with the change in direction of the rotatable magnetic field of the in-vitro magnetic field generating device. Although the device can facilitate the operation of the doctor to some extent, the scheme of the device still adopts the swing knot, half hook knot or slip knot mode to anchor the biological tissue, and the accuracy of the anchoring is relatively low, and the practicability is not strong.

[0005] Therefore, it is necessary to develop a minimally invasive surgery auxiliary device capable of accurately anchoring biological tissue, facilitating the operation of the doctor and improving the operation efficiency. SUMMARY

[0006] The present application mainly relates to a minimally invasive surgery auxiliary device, the magnet of the auxiliary device is permanently fixed with the clamp, the magnet can be delivered multiple times according to the actual traction force requirement, so that the biological tissue can be lifted by a suitable external force, and the problems that the doctor is inconvenient to cut the biological tissue, the boundary of the lesion tissue is not easy to distinguish, the lesion tissue is not accurately cut, and the operation efficiency is not high are solved.

[0007] The technical scheme of the present application is as follows:

[0008] A minimally invasive surgery auxiliary device, comprising a clamping part, a locking part, a control line, a bendable catheter and a control part, wherein

[0009] The clamping part is arranged at the front end of the auxiliary device, and an opening and closing device is arranged at the front end of the clamping part for grabbing and lifting the lesion tissue;

[0010] The locking part is connected to the clamping part, and a locking groove is arranged on the locking part for locking the clamping part, and the locking part further comprises a small magnet arranged at the end of the locking part for generating a magnetic field in the body and interacting with the external magnetic field to provide a traction force for the biological tissue;

[0011] The control line is connected to the locking part for controlling the opening and closing of the clamping part;

[0012] The bendable catheter is used for accommodating the control line and providing an axial sliding channel for the control line;

[0013] The control part is connected to the bendable catheter and the locking part, and is used for controlling the locking part and the clamping part to operate the biological tissue through the control line.

[0014] Further, the clamping part comprises at least two clamping arms, wherein at least one of the clamping arms is capable of rotating movement.

[0015] Further, the small magnet is in the shape of a long strip or a cylinder.

[0016] Further, the clamping part can be made of a magnetic conductive material.

[0017] Further, the locking part can also be made of a magnetic conductive material.

[0018] Further, the control part further comprises a handle main body, a handle sliding body and a handle front end, wherein

[0019] The handle main body is provided with a guide groove for restricting the movement of the handle sliding body in the guide groove;

[0020] The handle sliding body is connected with the rear end of the control wire for controlling the opening and closing of the clamping part and locking the clamping part, and the handle sliding body can be push-pull type or scissor type.

[0021] The handle front end is used for fixing the rear end of the bendable catheter, and is connected with the handle main body to realize axial rotation.

[0022] Further, the clamping part is further provided with a connecting rod and a hinge pin, the connecting rod has a protruding part, and the connecting rod and the hinge pin can be integrally formed.

[0023] Further, the control wire is further provided with a forked arm, and the forked arm can be provided on one side or both sides.

[0024] Further, the small magnet is a permanent magnet, and the shape of the small magnet can be a long strip or a cylinder.

[0025] Further, the locking groove can be in the shape of a stepped structure.

[0026] Further, the end of the control wire is further provided with an open circular groove, and the circular groove can be closed or open.

[0027] Further, the end of the control wire is further provided with an oblong groove for cooperating with a spring buckle provided at the front end of the bendable catheter.

[0028] Further, the front end of the bendable catheter has weak magnetism.

[0029] The auxiliary device for minimally invasive surgery can accurately anchor the biological tissue, is convenient for the doctor to operate, improves the operation efficiency, improves the success rate of ESD operation, and when the magnetic force of the small magnet is insufficient, the standby magnet can be transported to the anchoring position of the auxiliary device through the endoscope channel, the standby magnet is connected with the small magnet of the clamping part in series by magnetic force, and the magnetic force and the grabbing force are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 : Initial state of the auxiliary device for minimally invasive surgery.

[0031] Figure 2 : Open state of the auxiliary device for minimally invasive surgery.

[0032] Figure 3 : Locked state of the auxiliary device for minimally invasive surgery.

[0033] Figure 4 : Front end cross-sectional view of the clamp of the auxiliary device for minimally invasive surgery.

[0034] Figure 5 : Clamp part of the auxiliary device for minimally invasive surgery.

[0035] Figure 6 : Control line of the auxiliary device for minimally invasive surgery.

[0036] Figure 7 : Clamp cylinder of the auxiliary device for minimally invasive surgery.

[0037] Figure 8 : Control line of the auxiliary device for minimally invasive surgery.

[0038] Figure 9 : Front end of the bendable catheter of the auxiliary device for minimally invasive surgery.

[0039] Figure 10 : Spare magnet of the auxiliary device for minimally invasive surgery.

[0040] Figure 11 : Combination of the spare magnet and the clamp of the auxiliary device for minimally invasive surgery.

[0041] Figure 12 : Working process of the auxiliary device for minimally invasive surgery.

[0042] List of serial numbers and corresponding names:

[0043] DETAILED DESCRIPTION

[0044] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0045] Please refer to Figures 1 to 3, respectively, are the initial state schematic diagram, closed state schematic diagram and locking state schematic diagram of the auxiliary device of the minimally invasive surgery of the present application, Figure 4 is the front end cross-sectional view of the clamp of the auxiliary device of the minimally invasive surgery of the present application, further referring to Figure 5 is the schematic diagram of the clamping part of the auxiliary device, the auxiliary device of the minimally invasive surgery comprising:

[0046] the clamping part 01, the locking part, the control line 08, the bendable catheter 09 and the control part, wherein

[0047] the clamping part 01, the front end of which is provided with an opening and closing device for grabbing and pulling the lesion tissue, the clamping part 01 having at least two clamp arms, at least one of which can rotate to realize opening and closing through external operation, the clamping part 01 being provided with a sliding groove 0101 and a hinge hole 0102 for locking, the sliding groove 0101 having a sliding groove front end 0103 and a sliding groove rear end 0104, respectively, referring to Figure 6 is the schematic diagram of the connecting rod of the auxiliary device, the auxiliary device having at least one connecting rod 02, the connecting rod 02 being further provided with a front end hinge hole 0201, a rear end hinge hole 0202 and a connecting rod protruding part 0203, the connecting rod protruding part 0203 also being provided on the clamping part 01, or the connecting rod 02 and the clamping part 01 both being provided with protruding parts, the clamping part also being made of magnetic conductive material.

[0048] referring to Figure 7 is the schematic diagram of the clamp cylinder of the auxiliary device, the locking part being composed of the clamp cylinder 03, the locking part being made of magnetic conductive material for locking the clamping part 01, the clamp cylinder 03 being provided with a plurality of round holes and slots, including a locking slot 0301, a clamping slot 0302, a connecting rod protruding part 0303 and a clamping slot surface 0304, the locking slot being a general through hole or a stepped structure without limitation on shape, the locking part further comprising a small magnet 04 provided at the end of the locking part, the small magnet 04 being used to generate a magnetic field in the body and interact with the external magnetic field to provide a traction force on the biological tissue.

[0049] referring to Figure 8 is the schematic diagram of the control line of the auxiliary device, the control line 08 being used to control the opening and closing of the clamping part 01, the front end of the control line 08 being an open circular groove 0801, which is directly connected with the rear end pin 07, the open circular groove 0801 also being a closed circular groove, the rear end 0804 of the control line being connected with the handle sliding body 11 to control the opening and closing of the clamping part 01 by sliding the handle sliding body 11, the control line 08 being further provided with a long circular groove 0802, a long circular groove front end 0803 and a fork arm 0805, the fork arm 0805 also being provided on one side of the control line 08 at a proper position, or the control line 08 directly passing through the center through hole of the small magnet 04.

[0050] referring toFigure 9 The schematic diagram of the front end of the bendable catheter of the auxiliary device, the bendable catheter 09 is used for providing an axial sliding channel for the control line, the bendable catheter 09 is processed by using a spring type surrounding mode, and certain bending is easy to realize, the front end of the spring line 0901 is composed of a concave-convex part spring body, the front end of the concave-convex part has a spring buckle, the front end of the spring buckle is connected with the clamp cylinder 03, the rear end of the concave-convex part is connected with the bendable catheter body through a ring-shaped concave-convex structure, axial connection and rotation around the axis can be realized, the front end of the spring line 0901 is pre-weakly magnetized, so that the front end of the spring line 0901 has N and S poles, the front end of the spring line 0901 further includes a spring buckle inclined arm 09011, a spring buckle matching surface 09012, a spring buckle 09013 and an elastic part 09014, the rear end of the bendable catheter 09 is fixedly connected with the front end of the control handle 12, and the long circular groove 0802 is distributed in a staggered manner with the spring buckle 09013.

[0051] The control part is composed of the handle main body 10, the handle sliding body 11 and the handle front end 12, has a guide groove structure, and restricts the movement of the handle sliding body in the guide groove, the control part has a hand holding part, which is convenient for an operator to hold and operate, and the handle sliding body 11 is fixedly connected with the rear end of the control line 0804, is used for controlling the opening and closing of the clamping part 01, and locks the clamping part, the shape of the handle sliding body 11 can be push-pull type, scissor type or other equivalent forms, a spring 13 is arranged between the front end of the handle sliding body 11 and the sliding groove of the handle main body 10, and the initial state of the spring 13 is in a moderate compression state, so that a certain rebound force can be provided, and the clamping part 01 is promoted to be in a pre-tightening state.

[0052] The handle front end 12 is used for fixing the rear end of the spring line and connecting with the control handle main body 10, the handle front end 12 can be constrained to translate around the axis and is free to rotate in the axial direction.

[0053] The small magnet 04 is arranged at the end of the locking part, is used for generating a magnetic field in the body and interacting with an external magnetic field, and provides an action force for pulling biological tissues, the cross-sectional shape of the small magnet 04 can be circular or polygonal, and correspondingly, the shape of the small magnet 04 can be long strip-shaped or cylindrical or other suitable shapes, and the present application does not limit this.

[0054] The front end pin 05 is used for guiding the sliding groove 0101 at the front end of the clamping part 01.

[0055] The hinge pin 06 is used for the hinge connection of the connecting rod 02 and the clamping part 01, and the connecting rod 02 and the hinge pin 06 can be two independent parts or one integrally formed part.

[0056] The rear end pin 07 is used for connecting the control line 08 and the connecting rod 02.

[0057] The collar 14 is used for limiting the fork of the spring wire front end 0901 to slide along the rear end pin 07 in the axial direction, and also can improve the rigidity of the rear end pin 07, and is beneficial to the separation of the fork of the spring wire front end 0901 and the short pin.

[0058] Reference Figure 10 And Figure 11 The auxiliary device of the application, the auxiliary device can be attached to the tail of the auxiliary device according to requirements, and is used for enhancing the magnetic field traction force of the auxiliary device in the body.

[0059] Please refer to Figure 12 The working process diagram of the auxiliary device, the auxiliary device can be under the action of the external magnetic field, so that the biological tissue can be pulled by the suitable external force, the doctor is convenient to pull and cut the lesion mucosa tissue, the biological tissue is accurately cut, and the operation efficiency is improved.

[0060] The working process of the auxiliary device of the application is briefly described as follows:

[0061] The sliding slot 0101 of the clamping part 01 is connected by the front end pin 05, the hinge hole 0102 of the clamping part 01 is hingedly connected with the front end hinge hole 0201 of the connecting rod 02 by the hinge pin 06, the rear end hinge hole 0202 of the connecting rod 02 is then connected with the open circular slot 0801 at the front end of the control line by the rear end pin 07, the rear end 0804 of the control line is clamped into the handle sliding body 11, the bendable guide pipe 09 provides a channel for the control line 08, the clasp at the front end 0901 of the spring line is clamped into the clamping groove 0302 of the clip cylinder 03, the clasp matching surface 09012 is matched with the clamping groove surface of the clip cylinder 03, the connecting rod protrusion 0303 is matched with the elastic component 09014 on both sides, the initial state connection of the bendable guide pipe 09 and the clip cylinder 03 is completed, and thus the auxiliary device of the application is integrated with the handle through the control line 08 and the bendable guide pipe 09, and the clamping part of the auxiliary device is in a closed state. When the clamping part 01 reaches the biological tissue through the endoscope channel, the handle sliding body 11 is pushed to the front end, the clamping part 01 will be opened, at this time, the handle sliding body 11 is pulled to the rear end, the clamping part 01 starts to close, when it is judged that the clamping part 01 accurately clamps the biological tissue, the handle sliding body 11 is continuously pulled to the rear end with force, the connecting rod 02 is driven by the control line 08, and then the clamping part 01 is continuously slid to the rear end through the sliding slot 0101 and the guidance of the front end pin 05, when the connecting rod protrusion 0203 reaches the locking groove 0301 of the clip cylinder 03, under the mutual rebounding force of the two clamping parts 01, the two connecting rods 02 will produce a relative outward rotating movement tendency with the rear end pin 07 as the rotating shaft, and then the connecting rod protrusion 0203 is clamped into the locking groove 0301, the front end pin 05 is in contact with the front end 0103 of the sliding slot, and the closing action of the clip is completed.

[0062] When the handle sliding body 11 is continuously pulled back, the rear end pin 07 is continuously moved to the rear end by the control line 08, at this time, because the front end pin 05 has contacted the front end 0103 of the sliding groove, the clamping part 01 cannot continue to move back, when the pulling force of the handle sliding body 11 is further increased, the rear end pin 07 is separated from the open circular groove 0801 of the control line 08; further continue to pull the handle sliding body 11, the long circular groove front end 0803 of the control line 08 will contact the elastic buckle inclined arm 09011 of the spring line front end 0901, at this time, when the control line 08 continues to move to the rear end, the elastic buckle inclined arm 09011 is further pressed, and then the elastic buckle matching surface 09012 of the elastic buckle is separated from the clamping groove 0302 of the clamp cylinder 03, the control line 08 continues to move to the rear end, and the entire elastic buckle 09013 on the spring line front end 0901 is plastically deformed until it is pulled into the cavity of the spring line front end 0901. At this time, the bendable catheter 09 is separated from the clamp cylinder 03, the bendable catheter 09 is taken out to the outside of the body through the endoscope channel, and the clamping part 01 and other parts are left in the body. Under the action of the traction force of the magnetic field outside the body, the clamping part lifts the mucosal tissue of the clamped part, so that the doctor can efficiently, accurately and conveniently complete the operation of grabbing and cutting the diseased tissue.

[0063] Further, when the magnetic force of the clamping part 01 is not enough, a suitable spare magnet 15 can be adsorbed on the spring line front end 0901 and sent to the position of the previously anchored clamp through the endoscope channel. The spare magnet 15 will be superimposed on the tail of the clamp cylinder 03 under the action of the attraction force of the small magnet 04 in the body, and provide a suitable magnetic field traction force to lift the clamped mucosal tissue.

[0064] The auxiliary device for minimally invasive surgery can anchor in biological tissue and grab, lift and pull biological tissue through external force during ESD surgery, which further facilitates the doctor to remove the diseased tissue.

[0065] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An auxiliary device for minimally invasive surgery, characterized in that, The device comprises a clamping part, a locking part, a control line, a bendable catheter and a control part, wherein The clamping part is arranged at the front end of the auxiliary device, and an opening and closing device is arranged at the front end of the clamping part for grabbing and pulling the lesion tissue. The clamping part comprises at least two clamp arms, at least one of which can rotate. A sliding groove for locking is arranged on the clamp arm. The sliding groove has a front end and a rear end. A front end pin is arranged to connect the plurality of sliding grooves. A connecting rod is hingedly connected to the clamping part through a hinge pin. The connecting rod is provided with a connecting rod protrusion. The locking part is composed of a clamp cylinder connected to the clamping part. The clamp cylinder is provided with a clamping groove and a locking groove. The locking groove is used to lock the clamping part. The locking part contains a small magnet which generates a magnetic field in the body and interacts with the external magnetic field to provide a traction force for the biological tissue. The control line is used to control the opening and closing of the clamping part. The front end of the control line is provided with an open circular groove and an oblong groove. A rear end pin is arranged to connect the connecting rod to the open circular groove. The bendable catheter is used to accommodate the control line and provide an axial sliding channel for the control line. The bendable catheter comprises a spring line front end composed of a concave-convex spring body. The spring line front end comprises a spring buckle which is used to be clamped into the clamping groove. The control part is connected to the bendable catheter and the locking part. It is used to control the locking part and the clamping part to operate the biological tissue through the control line. The control part is used to move the control line and the connecting rod to the rear end, and then move the clamping part to the rear end through the sliding groove and the front end pin. When the front end pin contacts the front end of the sliding groove, the connecting rod protrusion reaches and pops into the locking groove. The control line further moves the rear end pin to the rear end, so that the rear end pin is separated from the open circular groove. When the control line continues to move to the rear end, the oblong groove compresses the spring buckle to deform plastically until the spring buckle is pulled into the cavity of the spring line front end, and the bendable catheter and the clamp cylinder are separated.

2. The device according to claim 1, wherein The small magnet is a permanent magnet, which is in the shape of a long strip or a cylinder.

3. The device for assisting minimally invasive surgery according to claim 1, characterized by The clamping part is made of a magnetic material.

4. The device for assisting minimally invasive surgery according to claim 1, characterized by The locking part is made of a magnetic material.

5. The minimally invasive surgery assisting apparatus according to claim 1, wherein The control part further comprises a handle main body, a handle sliding body and a handle front end, wherein The handle main body is provided with a guide groove for restricting the movement of the handle sliding body in the guide groove. The handle sliding body is connected to the rear end of the control line for controlling the opening and closing of the clamping part and locking the clamping part. The handle sliding body is push-pull type or scissors type. The handle front end is used to fix the rear end of the bendable catheter, which is connected to the handle main body to realize axial rotation.

6. The minimally invasive surgery assisting apparatus according to claim 1, wherein The connecting rod is integrally formed with the hinge pin.

7. The minimally invasive surgery assisting apparatus according to claim 1, wherein The control line is further provided with a fork arm which is arranged on one side or both sides.

8. The minimally invasive surgery assisting apparatus according to claim 1, characterized by, The locking groove is a stepped structure.

9. The auxiliary device for minimally invasive surgery according to claim 5, wherein The connecting rod is provided with a rear end hinge hole. The rear end hinge hole is connected to the open circular groove through the rear end pin. The handle sliding body is used to move the rear end pin to the rear end through the control line.

10. The auxiliary device for minimally invasive surgery according to claim 9, characterized in that, the oblong slot has an oblong slot front end; the elastic buckle further comprises an elastic buckle inclined arm and an elastic buckle mating surface; in the state that the rear end pin is separated from the open oblong slot, the handle sliding body is used to pull the control line to the rear end, so that the oblong slot front end contacts the elastic buckle inclined arm; the handle sliding body further moves the control line to the rear end, the oblong slot front end presses the elastic buckle inclined arm, thereby driving the elastic buckle mating surface to separate from the clamping groove; when the handle sliding body continues to move the control line to the rear end, the oblong slot front end presses the elastic buckle to plastically deform, until the elastic buckle is pulled into the cavity in front of the spring wire, realizing the separation of the bendable catheter and the clip cylinder.

11. The minimally invasive surgery assisting apparatus according to claim 1, characterized by, the front end of the bendable catheter has weak magnetism, having N and S poles.

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