Endoscopic puncture injection needle

Abstract

The utility model discloses an endoscopic puncture injection needle, and relates to the technical field of medical instruments, the endoscopic puncture injection needle comprises a shell, a handle, a needle tube, a sheathing canal and a balloon, and a piston sleeve is clamped in the shell; the handle is arranged in the shell in a sliding mode and penetrates through the piston sleeve, and the piston sleeve is tightly connected with the handle. One end of the needle tube is connected to the end, located on the shell, of the handle, a needle body is arranged at the other end of the needle tube, and the handle is provided with an injection channel communicated with the needle tube; the sheath tube is connected to the shell, the needle tube is located in the sheath tube, and the handle is used for driving the needle tube to move in the first direction so that the needle body can stretch out of the sheath tube; and the balloon is communicated with the interior of the sheathing canal through an air pipe and is used for forming negative pressure in a sheathing canal area between the needle body and the piston sleeve. By arranging the balloon, when the intestinal mucosa is punctured, negative pressure is formed in the sheath tube through the balloon to adsorb the mucosa, and therefore the needle body can conveniently pierce the intestinal mucosa.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an endoscopic puncture injection needle. BACKGROUND

[0002] Research has found that by applying a thermal ablation effect on the intestinal mucosa at a safe temperature, the activity of the intestinal mucosa is reduced, which helps to reduce the absorption of fat by the intestinal mucosa, thereby achieving the effect of weight loss for obese patients.

[0003] Generally, when applying a thermal ablation effect on the intestinal mucosa, protective water needs to be injected between the intestinal mucosa layer and the muscle layer to avoid irreversible burns to the muscle layer. The existing injection needle used under the endoscope is not convenient to insert the needle during puncture because the punctured tissue has a certain toughness and the tissue will move back relative to the needle body to a certain extent during puncture. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide an endoscopic puncture injection needle, which aims to solve the above technical problems.

[0005] The technical scheme adopted by the present application is as follows:

[0006] An endoscopic puncture injection needle comprises:

[0007] A housing is provided with a piston sleeve connected therein;

[0008] A handle is slidingly arranged in the housing and passes through the piston sleeve, and the piston sleeve is tightly connected with the handle;

[0009] A needle tube is connected at one end to the handle located at one end of the housing, and the other end of the needle tube is provided with a needle body, and the handle is provided with an injection channel in communication with the needle tube;

[0010] A sheath tube is connected to the housing, and the needle tube is located in the sheath tube, and the handle is used to drive the needle tube to move in a first direction so that the needle body extends out of the sheath tube; and

[0011] A balloon is in communication with the inside of the sheath tube through a gas tube for forming a negative pressure in the sheath tube region between the needle body and the piston sleeve.

[0012] Optionally, the housing is provided with a channel hole in the axial direction for accommodating the handle, and the channel hole is provided with a reset member for making the handle slide in a second direction opposite to the first direction.

[0013] Optionally, at least one guide groove extending in the first direction is arranged on the hole wall of the channel hole, and the handle is integrally formed with a guide side protrusion extending into the guide groove for sliding.

[0014] Optionally, the handle is provided with an elastic locking member protruding outwardly from the shell along a direction perpendicular to the first direction, and the shell is provided with a clamping hole along a direction perpendicular to the first direction, when the handle slides relative to the shell along the first direction, the elastic locking member can extend into the clamping hole to lock the handle.

[0015] Optionally, the outer wall of the shell is provided with an elastic pressing member, when the elastic pressing member is pressed, the elastic locking member can be pushed back into the shell to release the locking of the handle.

[0016] Optionally, the shell is internally provided with a first shoulder ring groove and a second shoulder ring groove, the piston sleeve is arranged in the first shoulder ring groove, the second shoulder ring groove is located on the side of the first shoulder ring groove close to the needle tube, and the air tube extends into the second shoulder.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] The endoscopic puncture injection needle provided by the embodiment of the application is provided with a balloon, so that when the intestinal mucosa is punctured, the balloon is used to form a negative pressure in the sheath tube to adsorb the mucosa, so that the needle body can be conveniently inserted into the intestinal mucosa. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure schematic diagram of the endoscopic puncture injection needle provided by the embodiment of the application in one view;

[0020] Figure 2 The cross-sectional schematic diagram of the endoscopic puncture injection needle provided by the embodiment of the application in one view;

[0021] Figure 3 The cross-sectional schematic diagram of the endoscopic puncture injection needle provided by the embodiment of the application in another view; Figure 2 The enlarged view of A in the middle;

[0022] Figure 4 The cross-sectional schematic diagram of the endoscopic puncture injection needle provided by the embodiment of the application in another view;

[0023] Explanation of reference numerals in the drawings:

[0024] 1-shell, 2-handle, 3-sheath tube, 4-needle tube, 5-needle body, 6-first shoulder ring groove, 7-second shoulder ring groove, 8-piston sleeve, 9-balloon, 10-third shoulder ring groove, 11-resetting member, 12-elastic locking member, 13-elastic pressing member, 14-injection channel. DETAILED DESCRIPTION

[0025] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0026] It should be noted that all the direction indications (such as up, down, left, right, front, back, and the like) in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between components in a certain posture (as shown in the drawings), and if the certain posture changes, the direction indications also change accordingly.

[0027] In the present application, unless otherwise explicitly specified and limited, the terms “connection”, “fixation” and the like should be understood in a broad sense, for example, “fixation” can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In addition, if the present application has a description of “first”, “second” and the like, the description of “first”, “second” and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the meaning of “and / or” appearing throughout the text includes three parallel solutions. For example, “A and / or B” includes A solution, or B solution, or A and B solutions. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0029] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application. Figures 1 to 4As shown, the embodiment of the present application provides an endoscopic puncture injection needle, which comprises a shell 1, a handle 2, a needle tube 4, a sheath tube 3 and a balloon 9. The sheath tube 3 is arranged at the second end of the sheath tube 3 by screw connection, and the sheath tube 3 is provided with a channel hole for the handle 2 along the axial direction. The handle 2 is arranged in the channel hole and is in sliding connection with the shell 1. The needle tube 4 is connected with the handle 2. The handle 2 is provided with an injection channel 14 in communication with the needle tube 4. The needle tube 4 is connected with a needle body 5 at the end away from the handle 2. The needle tube 4 and the needle body 5 are arranged in the sheath tube 3. The needle tube 4 and the needle body 5 are driven to retract into and extend out of the sheath tube 3 by the forward and backward movement of the handle 2.

[0030] In the above, the shell 1 is internally provided with a first shoulder ring groove 6 and a second shoulder ring groove 7. The inner diameters of the first shoulder ring groove 6 and the second shoulder ring groove 7 are greater than the inner diameter of the channel hole. The second shoulder ring groove 7 is located at the end of the needle tube 4 compared with the first shoulder ring groove 6. The first shoulder ring groove 6 is internally clamped with a piston sleeve 8. The piston sleeve 8 is in close fit with the side wall of the shell 1. The balloon 9 is connected to the inside of the shell 1 through an air pipe. The air pipe extends into the second shoulder ring groove 7. The handle 2 passes through the inside of the piston sleeve 8. The handle 2 is in close fit with the piston sleeve 8 by the elasticity of the piston sleeve 8.

[0031] From the above, when it is needed to inject protective water between the intestinal mucosa layer and the muscle layer, first, the injection device is connected at the end of the handle 2. Then, the sheath tube 3 is sent to the operation site through the endoscope. Then, the balloon 9 is squeezed to discharge air. Then, the sheath tube 3 is attached to the intestinal mucosa layer. The balloon 9 is loosened to form negative pressure to adsorb the intestinal mucosa. Finally, the needle tube 4 and the needle body 5 are moved out of the sheath tube 3 by pushing the handle 2 to move in the first direction, so as to penetrate into the intestinal mucosa. The water is injected into the intestinal mucosa layer and the muscle layer by the injection device to form protection.

[0032] In an exemplary embodiment, in order to avoid continuously pressing the handle 2 during the process of pushing the needle body 5 out for injection, and to achieve the purpose of saving labor, referring to Figure 3 As shown, at least one guide groove extending in the first direction is arranged on the hole wall of the channel hole. The handle 2 is integrally formed with a guide side protrusion extending into the guide groove. The handle 2 is provided with an elastic locking piece 12 protruding outward from the shell 1 along the direction perpendicular to the first direction. The shell 1 is provided with a clamping hole along the direction perpendicular to the first direction. When the handle 2 is pushed out of the sheath tube 3 with the needle body 5 and the needle tube 4 relative to the shell 1 along the first direction, the elastic locking piece 12 can extend into the clamping hole to lock the handle 2, so that the handle 2 does not need to be continuously pressed during injection, and the purpose of saving labor is achieved. In this embodiment, the elastic locking piece 12 is a spring pin.

[0033] In the above, the outer wall of the shell 1 is provided with an elastic pressing piece 13, the elastic pressing piece 13 comprises a pressing plate and a pressing head, the pressing plate is fixed to the outer wall of the shell 1, and the pressing head pushes the elastic locking piece 12 back into the shell 1 when the pressing plate is pressed downward, and the locking of the handle 2 is released, so that the handle 2 can be moved again. Of course, in the present embodiment, in order to automatically retract the needle body 5 and the needle tube 4 into the sheath tube 3 after the locking of the handle 2 is released, see Figure 3 The third shoulder ring groove 10 is provided in the shell 1, the inner diameter of the third shoulder ring groove 10 is larger than the inner diameter of the channel hole, the reset piece 11 is fixedly arranged in the third shoulder ring groove 10, the handle 2 is annularly provided with a shoulder portion, the shoulder portion side enters the third shoulder ring groove 10, and the reset piece 11 abuts against the shoulder portion, so that when the handle 2 is operated to move in the first direction, the reset piece 11 is compressed, the reset piece 11 has a tendency to move the handle 2 in the second direction, and when the locking of the handle 2 is released, the reset piece 11 moves the handle 2 in the second direction, so that the needle body 5 and the needle tube 4 return to the sheath tube 3.

[0034] In the above, the reset piece 11 is a spring, the first direction is a direction from a to b, and the second direction is a direction from b to a. Figure 1

[0035] In summary, the endoscopic puncture injection needle provided by the embodiment of the present application can segmentally seal and block the channel hole by the piston cylinder, the sheath tube 3 forms negative pressure adsorption of the intestinal mucosa by exhausting the balloon 9, and the needle body 5 can be conveniently pierced into the intestinal mucosa by pushing the handle 2, and the operation is simple and convenient to use.

[0036] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.​

Claims

1. An endoscopic puncture injection needle, characterized in that: include: a housing, wherein a piston sleeve is clamped in the housing; a handle, the handle being slidably disposed in the housing and passing through the piston sleeve, the piston sleeve being tightly connected to the handle; a needle tube, one end of the needle tube being connected to the handle located at one end of the housing, the other end of the needle tube being provided with a needle body, and the handle being provided with an injection channel communicating with the needle tube; a sheath, the sheath being connected to the housing, the needle being located within the sheath, the handle being used to drive the needle to move along a first direction so that the needle extends out of the sheath; and a balloon, the balloon being in communication with the interior of the sheath tube through the trachea and being used to create negative pressure in the sheath tube region between the needle body and the piston sleeve; The housing is axially provided with a passage hole for accommodating the handle, and a reset member for causing the handle to slide in a second direction opposite to the first direction is provided in the passage hole.

2. The endoscopic puncture injection needle according to claim 1, characterized in that: At least one guide groove extending along a first direction is provided on the hole wall of the channel hole, and the handle is integrally formed with a guide side protrusion extending into the guide groove and sliding therein.

3. The endoscopic puncture injection needle according to claim 1, characterized in that: The handle is provided with an elastic locking piece protruding toward the outside of the shell along a direction perpendicular to the first direction, and the shell is provided with a locking hole along a direction perpendicular to the first direction. When the handle slides relative to the shell along the first direction, the elastic locking piece can extend into the locking hole to lock the handle.

4. The endoscopic puncture injection needle according to claim 3, characterized in that: An elastic pressing piece is provided on the outer wall of the shell. When the elastic pressing piece is pressed, the elastic locking piece can be pushed back into the shell, thereby releasing the lock on the handle.

5. The endoscopic puncture injection needle according to claim 1, characterized in that: A first shoulder ring groove and a second shoulder ring groove are provided inside the shell. The piston sleeve is provided in the first shoulder ring groove. The second shoulder ring groove is located on the side of the first shoulder ring groove close to the needle tube. The air pipe extends into the second shoulder.

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