Injection assembly and endoscope

Abstract

The invention relates to the technical field of medical instruments, and discloses an injection assembly and an endoscope. The injection assembly comprises an insertion part which extends from the near end to the far end and is provided with a suction channel and a medicine injection channel; the medicine injection channel is used for guiding medicine to move from the near end of the medicine injection channel to the far end of the medicine injection channel to be discharged. The injection structure is used for puncturing human tissues and comprises a plurality of first injection needles; a plurality of first injection needles are arranged at the far end of the insertion part and are communicated with the medicine injection channel; the marking tube extends from the near end to the far end and is arranged in the suction channel; the marking tube is provided with an injection channel used for guiding dye to move from the near end of the injection channel to the far end of the injection channel to be discharged. The endoscope comprises an endoscope handle, an injection part and an injection assembly. By means of the technical scheme, the technical problem that multiple times of injection is prone to occurring in a certain area in intrauterine injection in the related technology can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an injection assembly and an endoscope. Background Art

[0002] Endoscope is a commonly used medical device, which is an inspection device that can directly enter the natural channels of the human body and provide doctors with sufficient diagnostic information to treat diseases. In the existing surgery of injecting drugs into the inner wall of the uterus using endoscope, there is a problem of multiple injections in a certain area.

[0003] Therefore, providing an injection assembly and an endoscope that can mark the injection point is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The invention discloses an injection assembly and an endoscope, so as to solve the technical problem of uterine inner wall injection in the related art that multiple injections are easily performed in a certain area.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: In a first aspect, an injection assembly is disclosed, comprising: The insertion part extends from the proximal end to the distal end and has a suction channel and a drug injection channel; the drug injection channel is used to guide the drug to move from the proximal end of the drug injection channel to the distal end of the drug injection channel for discharge; The injection structure is used to puncture human tissue and includes a plurality of first injection needles; the plurality of first injection needles are arranged at the distal end of the insertion portion and are connected to the injection channel; The marking tube extends from the proximal end to the distal end and is arranged in the suction channel; the marking tube has an injection channel for guiding the dye to move from the proximal end of the injection channel to the distal end of the injection channel for discharge; The distal end of the marking tube does not exceed the distal end of the first injection needle.

[0006] In some embodiments, the distal end of the marker tube is located within the suction channel, and the proximal end of the suction channel is used to connect to a negative pressure device.

[0007] In some embodiments, there are at least two first injection needles, which are evenly arranged along the circumference of the insertion portion; the distal end port of the marking tube is fixedly arranged on the inner wall of the suction channel close to the axis of the insertion portion; And / or, the distal end of the marking tube has an oblique cut, and the oblique cut is inclined from one side of the marking tube fixed to the suction channel to the other side in the radial direction of the marking tube toward the proximal end of the marking tube.

[0008] In some embodiments, the injection structure further includes a plurality of second injection needles; the plurality of second injection needles are disposed at the distal end of the insertion portion and communicated with the drug injection channel; Wherein, the distal end of any one of the first injection needle and the second injection needle is located outside the distal end of the other one.

[0009] In some embodiments, the plurality of first injection needles and / or the plurality of second injection needles are configured to have an expanded state and a collapsed state; When in the expanded state, the distal ends of the first injection needles and / or the distal ends of the second injection needles are located radially outside the insertion portion; When in the retracted state, the distal ends of the plurality of first injection needles and / or the distal ends of the plurality of second injection needles are located radially inward of the insertion portion; The plurality of first injection needles and / or the plurality of second injection needles may be switched between an extended state and a retracted state.

[0010] In some embodiments, the plurality of first injection needles and / or the plurality of second injection needles are slidably disposed in the injection channel, and as the plurality of first injection needles and / or the plurality of second injection needles slide, the plurality of first injection needles and / or the plurality of second injection needles are switched between an extended state and a retracted state; When in the expanded state, the distal ends of the plurality of first injection needles and / or the distal ends of the plurality of second injection needles are located outside the distal end of the drug injection channel; When in the retracted state, the distal ends of the plurality of first injection needles and / or the distal ends of the plurality of second injection needles are located in the drug injection channel.

[0011] In some embodiments, the drug injection channel includes a delivery channel and a distribution channel; the distal end of the delivery channel is connected to the distribution channel, and the distal end of the distribution channel is connected to a plurality of first injection needles and a plurality of second injection needles, so as to evenly distribute the drug to all the first injection needles and all the second injection needles; Alternatively, a plurality of first injection needles and a plurality of second injection needles are connected to the drug injection channel through injection tubes respectively.

[0012] In some embodiments, the insertion portion includes an insertion tube and a medicine sheath; the medicine sheath is disposed at the distal end of the insertion tube; The distribution channel is arranged in the medicine sheath, and the delivery channel is arranged in the insertion tube and / or the medicine sheath; The suction channel is arranged in the insertion tube.

[0013] In a second aspect, an endoscope is disclosed, comprising an endoscope handle, an injection portion, and the injection assembly in the first aspect; The injection part is arranged on the instrument mouth of the endoscope handle, and the proximal ends of the insertion part and the marking tube extend into the endoscope handle and are connected with the injection part; the injection part is used to deliver medicine to the injection channel and deliver dye to the injection channel.

[0014] In some embodiments, the injection unit includes a syringe and a piston; the syringe has two chambers, one of which is used to place a drug and is connected to a drug injection channel, and the other chamber is used to place a dye and is connected to an injection channel; the piston is used to drive the drug into the drug injection channel and drive the dye into the injection channel; And / or, the injection portion is slidably connected to the instrument mouth to drive the injection structure to move axially along the drug injection channel.

[0015] The technical solution adopted by the present invention can achieve the following beneficial effects: In the injection assembly of the present application, during injection, a plurality of first injection needles can pierce human tissue, and the medicine can move from the proximal end of the injection channel to the distal end of the injection channel through the injection channel, and enter the human tissue through the plurality of first injection needles. During the injection process of the first injection needle, the dye moves from the proximal end of the injection channel to the distal end of the injection channel and is discharged to mark the human tissue. During the process of multiple injections of human tissue by the doctor, the marked position of the human tissue can be observed to determine whether there has been an injection here, thereby avoiding the problem of multiple injections in a certain area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is an axonometric view of the endoscope of the present invention; Figure 2 yes Figure 1 The enlarged view of point A in the middle; Figure 3 Is the axonometric view of the injection assembly of the present invention Figure 1 ; Figure 4 yes Figure 3 The enlarged view of point B in the middle; Figure 5 Is the axonometric view of the injection assembly of the present invention Figure 2 ; Figure 6 yes Figure 5 Enlarged view of point C in the middle; Figure 7 is a cross-sectional view of the endoscope of the present invention; Figure 8 yes Figure 7 The enlarged view of point D in the middle; Fig. 9 is a cross-sectional view of the injection assembly of the present invention Figure 1 ; Fig.10 yes Fig. 9 Enlarged view of point E in the middle; Fig.11 is a cross-sectional view of the injection assembly of the present invention Figure 2 ; Fig.12 yes Fig.11 The enlarged view of F in the middle; Fig.13 Is the axonometric view of the injection assembly of the present invention Figure 3 ; Fig.14 It is a cross-sectional view of the injection portion of the present invention.

[0018] In the figure: 100-injection assembly, 110-insertion part, 111-insertion tube, 112-medicine sheath, 120-injection structure, 121-first injection needle, 122-second injection needle, 130-suction channel, 140-drug injection channel, 141-delivery channel, 142-distribution channel, 150-marking tube, 151-oblique cut, 152-injection channel, 160-injection tube; 200 - endoscope, 210 - endoscope handle, 220 - injection part, 221 - syringe barrel, 222 - piston, 223 - chamber. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0020] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0021] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0022] The inventors found that in the existing operation of injecting drugs into the uterine wall using the endoscope 200, inexperienced doctors may repeat the injection due to unfamiliarity with the operation, and experienced doctors may also have similar problems due to fatigue or distraction. In addition, the appearance of the uterine wall tissue is similar and lacks obvious markings, making it difficult for doctors to accurately distinguish between injected and uninjected areas, increasing the risk of repeated injections, which in turn leads to the problem of multiple injections in a certain area.

[0023] The following is combined with Figures 1 to 14 , an injection assembly 100 and an endoscope 200 provided in the present application are described in detail through specific embodiments and their application scenarios.

[0024] Some embodiments of the present application disclose an injection assembly 100, such as Figure 2 , Figure 8 and Fig.12 As shown, it includes an insertion portion 110 , an injection structure 120 and a marking tube 150 .

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Fig. 9 , Fig.11 and Fig.13 As shown, the insertion portion 110 extends from the proximal end to the distal end to form an elongated tubular structure, so that it can be smoothly inserted into a human body cavity.

[0026] like Figure 2 , Figure 6 , Figure 8 and Fig.10 As shown, the injection structure 120 includes a plurality of first injection needles 121 for piercing human tissue.

[0027] like Figure 4 and Fig. 9 As shown, the insertion part 110 has a drug injection channel 140, and a plurality of first injection needles 121 are arranged at the distal end of the insertion part 110 and communicate with the drug injection channel 140. During the operation, the insertion part 110 is inserted into the human body cavity, and the plurality of first injection needles 121 pierce the human body tissue, and the drug injection channel 140 guides the medicine to move from the proximal end of the drug injection channel 140 to the distal end of the drug injection channel 140 to be discharged, and enter the human body tissue through the plurality of first injection needles 121.

[0028] In this embodiment, the cross-sections of the first injection needles 121 may be circular, elliptical, polygonal, etc. This embodiment may be flexibly configured according to usage requirements and is not limited here.

[0029] It should be noted that the human body cavity in this embodiment refers to the vagina, and the human body tissue refers to the inner wall of the uterus, and the same applies to the following.

[0030] like Figure 2 , Figure 4 , Figure 6 and Figure 8-Figure 13 As shown, the insertion part 110 also has a suction channel 130, and the marking tube 150 is arranged in the suction channel 130 and extends from the proximal end to the distal end, and the marking tube 150 has an injection channel 152. During the operation, the insertion part 110 is inserted into the human body cavity, and the dye moves from the proximal end of the injection channel 152 to the distal end of the injection channel 152 and is discharged and marked on the human tissue. During the injection process, the doctor can observe whether there is a mark in the area, and then determine whether the injection has been performed here, which makes it easier for the doctor to accurately distinguish between the injected and uninjected areas, avoiding the occurrence of repeated injections.

[0031] like Figure 8 , Fig.10 and Fig.12 As shown, the distal end of the marking tube 150 does not exceed the distal end of the first injection needle 121. During the operation, the insertion portion 110 is inserted into the human body cavity, and the first injection needles 121 pierce the human body tissue. Since the distal end of the marking tube 150 does not exceed the distal end of the first injection needle 121, during the process of the first injection needle 121 piercing the human body tissue, it can be avoided that the marking tube 150 presses on the human body tissue, resulting in the failure of the first injection needles 121 to successfully pierce the human body tissue.

[0032] like Figure 8 , Fig.10 and Fig.12 As shown, the distal end of the marking tube 150 is located in the suction channel 130, and the proximal end of the suction channel 130 is used to connect the negative pressure device. During the operation, the insertion part 110 is inserted into the human tissue, and the negative pressure device works in the suction channel 130 to form negative pressure, which attracts and gathers the human tissue in the area in the suction channel 130. On the one hand, the human tissue around the center of the injection area can be tightened to improve the puncture efficiency; on the other hand, the negative pressure can also draw away the excess dye to avoid excessive dye spreading in the human tissue in the injection area, resulting in the doctor being unable to observe the center of the injection area; on the third hand, since the human tissue is loose, the negative pressure can attract and gather the human tissue in the suction channel 130. After the first injection needle 121 completes the injection and the negative pressure disappears, the human tissue will return to its original state, thereby expanding a wider injection area.

[0033] It should be noted that the negative pressure equipment can be manually controlled to cause negative pressure to be generated or disappear.

[0034] like Figure 2 , Figure 6 , Figure 8 and Fig.10 As shown, there are at least two first injection needles 121, which are evenly arranged along the circumference of the insertion portion 110. Multiple injection needles working simultaneously can significantly shorten the injection time and improve the overall injection efficiency.

[0035] like Figure 8 , Fig.10 and Fig.12 As shown, the distal end port of the marking tube 150 is fixedly arranged on the inner wall of the suction channel 130 close to the axis of the insertion part 110. It should be noted that when the injection assembly 100 is used for the endoscope 200, a camera module will be integrated at the distal end of the insertion part 110. In order to facilitate the installation of the camera module, the suction channel 130 needs to be eccentrically arranged with the insertion part 110. Therefore, by adopting a method in which the distal end port of the marking tube 150 is fixedly arranged on the inner wall of the suction channel 130 close to the axis of the insertion part 110, the marking tube 150 can be as close to the axis position of the insertion part 110 as possible, so that the marking tube 150 can be marked as close to the center position of the injection area as possible during the process of marking human tissue.

[0036] and / or, if Figure 8 , Fig.10 and Fig.12 As shown, the distal end of the marking tube 150 has an oblique cut 151, and the oblique cut 151 is inclined from one side where the marking tube 150 is fixed to the suction channel 130, to the other side in the radial direction of the marking tube 150, toward the proximal end of the marking tube 150. By providing the oblique cut 151, when the human tissue is attracted and gathered in the suction channel 130, the contact area between the marking tube 150 and the human tissue can be made larger, thereby better marking the injection area.

[0037] like Figure 2 and Figure 8 As shown, the injection structure 120 further includes a plurality of second injection needles 122 , which have the same function as the plurality of first injection needles 121 , and are all used to puncture human tissue.

[0038] like Figure 2 and Figure 8As shown, a plurality of second injection needles 122 are disposed at the distal end of the insertion portion 110 and communicated with the injection channel 140. During the operation, the insertion portion 110 is inserted into the human body cavity, and the plurality of second injection needles 122 pierce the human body tissue, and the injection channel 140 guides the medicine to move from the proximal end of the injection channel 140 to the distal end of the injection channel 140 to be discharged, and enter the human body tissue through the plurality of second injection needles 122.

[0039] like Figure 2 As shown, the distal end of any one of the first injection needle 121 and the second injection needle 122 is located outside the distal end of all the other needles. The first injection needles 121 and the second injection needles 122 form two injection layers with different diameters, and the drug can cover a wider area faster, thereby improving the injection efficiency.

[0040] In some embodiments, the second injection needle 122 is located outside the first injection needle 121 .

[0041] In some embodiments, the first injection needle 121 is located outside the second injection needle 122 .

[0042] like Figure 2 and Fig.12 As shown, the first injection needles 121 and / or the second injection needles 122 are configured to have an expanded state and a retracted state. In the expanded state, the distal ends of the first injection needles 121 and / or the second injection needles 122 are located radially outside the insertion portion 110; in the retracted state, the distal ends of the first injection needles 121 and the second injection needles 122 are located radially inside the insertion portion 110. The first injection needles 121 and / or the second injection needles 122 can switch between the expanded state and the retracted state.

[0043] When in the retracted state, the distal ends of the first injection needles 121 and / or the distal ends of the second injection needles 122 are located radially inward of the insertion portion 110, so as to reduce the diameter of the first injection needles 121 and / or the second injection needles 122 as much as possible, so that the insertion portion 110 can be smoothly inserted into the human body cavity. After the insertion portion 110 reaches the injection area, the first injection needles 121 and / or the second injection needles 122 are switched to the expanded state, and the distal ends of the first injection needles 121 and / or the second injection needles 122 are located radially outward of the insertion portion 110, so as to increase the diameter of the distal ends of the first injection needles 121 and / or the second injection needles 122, thereby increasing the injection range.

[0044] In some embodiments, in the expanded state, the distal ends of the plurality of first injection needles 121 are located radially inside the insertion portion 110 , and the distal ends of the plurality of second injection needles 122 are located radially outside the insertion portion 110 .

[0045] In some embodiments, in the expanded state, the distal ends of the plurality of second injection needles 122 are located radially inside the insertion portion 110 , and the distal ends of the plurality of first injection needles 121 are located radially outside the insertion portion 110 .

[0046] In some embodiments, in the expanded state, the distal ends of the plurality of second injection needles 122 and the distal ends of the plurality of first injection needles 121 are both located radially outside the insertion portion 110 .

[0047] like Figure 2 and Fig.12 As shown, the first injection needles 121 and / or the second injection needles 122 are slidably disposed in the injection channel 140, and as the first injection needles 121 and / or the second injection needles 122 slide, the first injection needles 121 and / or the second injection needles 122 switch between an expanded state and a retracted state. In the expanded state, the distal ends of the first injection needles 121 and / or the distal ends of the second injection needles 122 are located outside the distal end of the injection channel 140; in the retracted state, the distal ends of the first injection needles 121 and / or the distal ends of the second injection needles 122 are located inside the injection channel 140.

[0048] When in the retracted state, the distal ends of the first injection needles 121 and / or the distal ends of the second injection needles 122 are all located in the injection channel 140, and the first injection needles 121 and / or the second injection needles 122 can be prevented from causing damage to human tissues during the insertion of the insertion portion 110 into the human body cavity. After the insertion portion 110 reaches the injection area, the first injection needles 121 and / or the second injection needles 122 move toward the distal end of the insertion portion 110, so that the distal ends of the first injection needles 121 and / or the distal ends of the second injection needles 122 move to the outside of the distal end of the injection channel 140, and can then pierce the human tissues.

[0049] It should be noted that the first injection needle 121 and / or the second injection needle 122 are elastic. When the first injection needle 121 and / or the second injection needle 122 are in the retracted state, the first injection needle 121 and / or the second injection needle 122 are deformed and store elastic potential energy. When the first injection needle 121 and / or the second injection needle 122 move to the outside of the distal end of the injection channel 140, the first injection needle 121 and / or the second injection needle 122 are deformed and restored to switch to the expanded state, and the distal ends of several first injection needles 121 and / or several second injection needles 122 are located radially outside the insertion portion 110, so that the injection area can be injected.

[0050] In some embodiments, a plurality of first injection needles 121 are slidably disposed in the drug injection channel 140 .

[0051] In some embodiments, a plurality of second injection needles 122 are slidably disposed in the injection channel 140 .

[0052] In some embodiments, a plurality of first injection needles 121 and a plurality of second injection needles 122 are slidably disposed in the drug injection channel 140 .

[0053] like Fig. 9 As shown, the injection channel 140 includes a delivery channel 141 and a distribution channel 142, and the distal end of the delivery channel 141 is connected to the distribution channel 142. The proximal end of the delivery channel 141 is used to connect to the source of the medicine, and the medicine can enter the distribution channel 142 through the delivery channel 141.

[0054] like Fig. 9 and Fig.10 As shown, the distal end of the distribution channel 142 is connected to a plurality of first injection needles 121 and a plurality of second injection needles 122, and is used to evenly distribute the medicine to all the first injection needles 121 and all the second injection needles 122. The medicine entering from the delivery channel 141 flows into the distribution channel 142, and is finally discharged through the first injection needles 121 and the second injection needles 122. By setting the distribution channel 142, all the first injection needles 121 and all the second injection needles 122 can obtain the same dose of medicine, avoiding the problem of uneven dose, thereby ensuring that the injection structure 120 has the same dose at each injection part 220 during the injection process.

[0055] In this embodiment, the distribution channel 142 is an annular channel, so that all first injection needles 121 and all second injection needles 122 can obtain the same dose of medicine. The delivery channel 141 can be set to 1, 2, 3 or more, and can be flexibly set according to actual use requirements, which is not limited in this embodiment.

[0056] In this embodiment, the plurality of first injection needles 121 and / or the plurality of second injection needles 122 are slidably disposed in the distribution channel 142. In the retracted state, the distal ends of the plurality of first injection needles 121 and / or the distal ends of the plurality of second injection needles 122 are located in the distribution channel 142; in the extended state, the distal ends of the plurality of first injection needles 121 and / or the distal ends of the plurality of second injection needles 122 are located outside the distribution channel 142.

[0057] Or, if Fig.12 and Fig.13As shown, a plurality of first injection needles 121 and a plurality of second injection needles 122 are respectively connected to the injection channel 140 through an injection tube 160. The proximal end of the injection tube 160 is used to connect to the source of the medicine, and the medicine can enter the plurality of first injection needles 121 and the plurality of second injection needles 122 through the plurality of injection tubes 160, and be discharged from the plurality of first injection needles 121 and the plurality of second injection needles 122. By having a plurality of first injection needles 121 and a plurality of second injection needles 122 correspond to a respective injection tube 160, it can be ensured that all first injection needles 121 and all second injection needles 122 obtain the same dose of medicine, thus avoiding the problem of uneven dose, and further ensuring that the dose of each injection part 220 of the injection structure 120 is the same during the injection process.

[0058] In this embodiment, at least a portion of the injection tube 160 can move axially along the injection channel 152, thereby driving a plurality of first injection needles 121 and / or a plurality of second injection needles 122 to move in the injection channel 152, so that the plurality of first injection needles 121 and / or a plurality of second injection needles 122 can switch between an expanded state and a retracted state.

[0059] like Fig. 9 and Fig.10 As shown, the insertion part 110 includes an insertion tube 111 and a medicine sheath 112, and the medicine sheath 112 is sleeved at the distal end of the insertion tube 111. In this embodiment, a plurality of first injection needles 121 and a plurality of second injection needles 122 are arranged at the distal end of the medicine sheath 112, and the suction channel 130 is arranged in the insertion tube 111.

[0060] like Fig. 9 and Fig.10 As shown, the distribution channel 142 is arranged in the medicine sheath 112, and the delivery channel 141 is arranged in the insertion tube 111 and / or the medicine sheath 112. Since the distribution channel 142 is an annular channel, and the distal end of the insertion tube 111 is also integrated with a camera module, it is difficult to process an annular channel in the insertion tube 111. In this embodiment, by directly sleeved with the medicine sheath 112 at the distal end of the insertion tube 111, it is much easier to process the annular channel directly on the medicine sheath 112 than on the insertion tube 111 integrated with the camera module, thereby reducing the processing difficulty.

[0061] In some embodiments, the delivery channel 141 is disposed within the insertion tube 111 .

[0062] In some embodiments, the delivery channel 141 is disposed within the sheath 112 .

[0063] Some embodiments of the present application also disclose an endoscope 200, such as Figure 1 , Figure 7 and Fig.14 As shown, it includes an endoscope handle 210, an injection part 220 and an injection assembly 100.

[0064] like Figure 1 and Figure 7 As shown, the injection part 220 is arranged on the instrument mouth of the endoscope handle 210, and the proximal end of the insertion part 110 and the proximal end of the marking tube 150 extend into the endoscope handle 210 and are connected to the injection part 220. The injection part 220 is used to deliver medicine to the injection channel 140 and to deliver dye to the injection channel 152. During the operation, the insertion part 110 is inserted into the human body cavity, and the first injection needles 121 and the second injection needles 122 pierce the human body tissue. The injection part 220 delivers medicine to the injection channel 140 so that the medicine enters the human body tissue through the first injection needles 121 and the second injection needles 122. During the operation, the negative pressure device works in the suction channel 130 to form a negative pressure, attracting and gathering the human body tissue in the area in the suction channel 130, and the injection part 220 delivers dye to the injection channel 152 so that the marking tube 150 marks the injection area.

[0065] like Figure 7 and Fig.14 As shown, the injection unit 220 includes a syringe 221 and a piston 222. The syringe 221 has two chambers 223, one of which is used to place medicine and is connected to the injection channel 140, and the other chamber 223 is used to place dye and is connected to the injection channel 152. By providing two chambers 223 in the syringe 221, medicine and dye can be stored at the same time, without using two syringes 221, saving space.

[0066] In this embodiment, two chambers 223 are separated in the syringe 221 by a partition.

[0067] like Figure 7 and Fig.14 As shown, the piston 222 is used to drive the medicine into the injection channel 140 and drive the dye into the injection channel 152. During the operation, the first injection needle 121 and the second injection needle 122 pierce the human tissue, and when the human tissue in the injection area is attracted and gathered in the suction channel 130, by pressing the piston 222, the medicine can enter the injection channel 140 and the dye can enter the injection channel 152, and finally the medicine enters the human tissue and the dye is marked on the surface of the human tissue.

[0068] In some embodiments, there is one piston 222. When the piston 222 is pressed, the dye enters the injection channel 152 and the medicine also enters the injection channel 140.

[0069] In some embodiments, there are two pistons 222, each corresponding to a chamber 223. When a medicine needs to be injected, the corresponding piston 222 is pressed; when a dye needs to be injected, the corresponding piston 222 is pressed; when a medicine and a dye need to be injected at the same time, both are pressed at the same time.

[0070] and / or, if Figure 7 As shown, the injection part 220 is slidably connected to the instrument mouth, and is used to drive the injection structure 120 to move axially along the injection channel 140. By moving the injection part 220, the first injection needle 121 and / or the plurality of second injection needles 122 are driven to switch between the expanded state and the retracted state.

[0071] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0072] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0073] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection assembly, characterized in that: include: An insertion portion, extending from the proximal end to the distal end, having a suction channel and a drug injection channel; The drug injection channel is used to guide the drug to move from the proximal end of the drug injection channel to the distal end of the drug injection channel for discharge; The injection structure is used to puncture human tissue and comprises a plurality of first injection needles; the first injection needles are arranged at the distal end of the insertion portion and communicated with the drug injection channel; A marking tube extending from the proximal end to the distal end and arranged in the suction channel; the marking tube has an injection channel for guiding the dye to move from the proximal end of the injection channel to the distal end of the injection channel for discharge; Wherein, the distal end of the marking tube does not exceed the distal end of the first injection needle.

2. An injection assembly according to claim 1, characterized in that: The distal end of the marking tube is located in the suction channel, and the proximal end of the suction channel is used for connecting to a negative pressure device.

3. An injection assembly according to claim 1, characterized in that: There are at least two first injection needles, which are evenly arranged along the circumference of the insertion portion; the distal end port of the marking tube is fixedly arranged on the inner wall of the suction channel close to the axis of the insertion portion; And / or, the distal end of the marking tube has an oblique cut, and the oblique cut is inclined from one side where the marking tube is fixed to the suction channel to the other side in the radial direction of the marking tube toward the proximal end of the marking tube.

4. An injection assembly according to claim 1, characterized in that: The injection structure further includes a plurality of second injection needles; the plurality of second injection needles are arranged at the distal end of the insertion portion and communicated with the drug injection channel; Wherein, the distal end of any one of the first injection needle and the second injection needle is located outside the distal end of the other one.

5. An injection assembly according to claim 4, characterized in that: The plurality of the first injection needles and / or the plurality of the second injection needles are configured to have an expanded state and a collapsed state; When in the expanded state, the distal ends of the plurality of first injection needles and / or the distal ends of the plurality of second injection needles are located radially outside the insertion portion; When in the retracted state, the distal ends of the plurality of first injection needles and the distal ends of the plurality of second injection needles are located radially inward of the insertion portion; The first injection needles and / or the second injection needles may be switched between the expanded state and the collapsed state.

6. An injection assembly according to claim 5, characterized in that: The first injection needles and / or the second injection needles are slidably disposed in the drug injection channel, and as the first injection needles and / or the second injection needles slide, the first injection needles and / or the second injection needles are switched between the expanded state and the retracted state; When in the expanded state, the distal ends of the plurality of first injection needles and / or the distal ends of the plurality of second injection needles are located outside the distal end of the drug injection channel; When in the retracted state, the distal ends of the plurality of first injection needles and / or the distal ends of the plurality of second injection needles are located in the drug injection channel.

7. An injection assembly according to claim 6, characterized in that: The drug injection channel includes a delivery channel and a distribution channel; the distal end of the delivery channel is connected to the distribution channel, and the distal end of the distribution channel is connected to a plurality of the first injection needles and a plurality of the second injection needles, so as to evenly distribute the drug to all the first injection needles and all the second injection needles; Alternatively, a plurality of the first injection needles and a plurality of the second injection needles are connected to the drug injection channel through injection tubes respectively.

8. An injection assembly according to claim 7, characterized in that: The insertion part comprises an insertion tube and a medicine sheath; the medicine sheath is arranged at the distal end of the insertion tube; The distribution channel is arranged in the medicine sheath, and the delivery channel is arranged in the insertion tube and / or in the medicine sheath; Wherein, the suction channel is arranged in the insertion tube.

9. An endoscope, characterized in that: Comprising an endoscope handle, an injection portion and the injection assembly according to any one of claims 1 to 8; The injection part is arranged on the instrument mouth of the endoscope handle, and the proximal ends of the insertion part and the marking tube extend into the endoscope handle and are connected with the injection part; the injection part is used to deliver medicine to the injection channel and deliver dye to the injection channel.

10. An endoscope according to claim 9, characterized in that: The injection part comprises a syringe and a piston; the syringe has two chambers, one of which is used to place medicine and is connected to the injection channel, and the other is used to place dye and is connected to the injection channel; the piston is used to drive the medicine into the injection channel and drive the dye into the injection channel; And / or, the injection portion is slidably connected to the instrument mouth to drive the injection structure to move axially along the drug injection channel.

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