Negative pressure drainage device

Abstract

The negative pressure drainage device comprises a drainage cylinder, a negative pressure air exhaust assembly is arranged in the drainage cylinder, the negative pressure air exhaust assembly movably extends out of one end of the drainage cylinder, a mounting hole is formed in the other end of the drainage cylinder, the end of the drainage cylinder is movably connected with a soft drainage tube through the mounting hole, and the outer diameter of the soft drainage tube is equal to the diameter of the mounting hole. The end, extending into the drainage cylinder, of the soft drainage tube is connected with a soft limiting head, the diameter of the soft limiting head is larger than that of the mounting hole, and the drainage tube has the advantages that the soft drainage tube can be detached, the utilization rate of the drainage cylinder is increased, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a negative pressure drainage device. BACKGROUND

[0002] After surgery, patients will have a certain amount of fluid (i.e. subcutaneous fluid) at the wound site, which generally needs to be drained by a medical negative pressure drainage device. The front end of the negative pressure drainage device is connected to a drainage tube, which is pierced into the subcutaneous fluid by a needle, and the fluid drainage operation can be performed. The drainage tube is generally integrally connected with the negative pressure drainage device, and the drainage tube has a small diameter and is not easy to clean. Therefore, most of the current negative pressure drainage devices are disposable products, which have low utilization rate and cause waste of material cost. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a negative pressure drainage device, which aims to solve the technical problem of low utilization rate of most of the existing negative pressure drainage devices which are disposable products.

[0004] To achieve the above-mentioned purpose, the present application provides a negative pressure drainage device, which comprises a drainage cylinder, a negative pressure air extraction assembly is arranged in the drainage cylinder, the negative pressure air extraction assembly is movably extended from one end of the drainage cylinder, an installation hole is formed in the other end of the drainage cylinder, a soft drainage tube is movably connected to the end of the drainage cylinder through the installation hole, the outer diameter of the soft drainage tube is equal to the diameter of the installation hole, a soft limiting head is connected to the end of the soft drainage tube extending into the drainage cylinder, and the diameter of the soft limiting head is greater than the diameter of the installation hole.

[0005] Optionally, the drainage cylinder comprises a first cylinder body and a second cylinder body which are detachably connected, the installation hole is formed in the end of the first cylinder body away from the second cylinder body, and the negative pressure air extraction assembly is movably extended from the end of the second cylinder body away from the first cylinder body.

[0006] Optionally, a first threaded section is arranged on the side of the first cylinder body away from the installation hole, and a second threaded section which is threadedly matched with the first threaded section is formed on the side of the second cylinder body in correspondence.

[0007] Optionally, a plurality of traction ropes are connected to the end of the soft limiting head away from the soft drainage tube, the plurality of traction ropes are arranged in a ring array around the center of the soft limiting head, and the plurality of traction ropes are twisted to form a pulling rope.

[0008] Optionally, the negative pressure air extraction assembly comprises a piston block movably attached to the inner wall of the drainage cylinder, the piston block is connected to a pull rod, the pull rod movably penetrates through the end of the drainage cylinder away from the installation hole and is connected to a handle.

[0009] Optionally, a strip-shaped limiting slot is formed in the pull rod along the length direction of the pull rod, and a limiting assembly is arranged on the end of the drainage cylinder away from the installation hole, the limiting assembly is used to extend into the limiting slot to generate pressure on the pull rod, so as to fix the pull rod at a corresponding position.

[0010] Optionally, the limiting assembly comprises a fixed block connected to the outer wall of the drainage cylinder, a fastening screw is screwed through the fixed block, and a limiting block cooperated with the limiting slot is movably connected to the bottom of the fastening screw.

[0011] Optionally, the two inner side walls along the length direction of the limiting slot are provided with soft rubber strips, and the limiting block is attached between the two soft rubber strips.

[0012] Optionally, the outer wall of the drainage cylinder is provided with a strip-shaped transparent observation window along the length direction of the drainage cylinder, and the transparent observation window is provided with a plurality of scale lines along the length direction of the transparent observation window.

[0013] The beneficial effects that can be achieved by the present application are as follows:

[0014] In operation, the soft limiting head is first inserted into the drainage cylinder through the installation hole, the soft limiting head is deformed when passing through the installation hole, and returns to the original state when extending out of the installation hole. At this time, the soft drainage tube is slightly pulled outwards to make the soft limiting head attach to the inner wall of the drainage cylinder, thereby completing the assembly of the soft drainage tube and the drainage cylinder, and the soft limiting head can have a certain sealing property after assembly, preventing subsequent effusion leakage. In use, after the soft drainage tube is punctured into subcutaneous effusion, negative pressure is generated by the negative pressure air extraction assembly to guide the effusion into the drainage cylinder. After use, the soft drainage tube that is not easy to clean can be scrapped, and the remaining components such as the drainage cylinder and the negative pressure air extraction assembly can be reused, thereby improving the utilization rate and reducing the material cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0016] Figure 1 FIG. 1 is a structural schematic view of a negative pressure drainage device in an embodiment of the present application;

[0017] Figure 2 FIG. 2 is a schematic view of the outer structure of a negative pressure drainage device in an embodiment of the present application;

[0018] Figure 3 FIG. 3 is a partial enlarged structural schematic view of position A in FIG. 1; Figure 1

[0019] Figure 4 FIG. 4 is a structural schematic view (top view) of a negative pressure air extraction assembly in an embodiment of the present application.

[0020] Reference signs:

[0021] ​100 - drainage cylinder, 110 - first cylinder body, 120 - second cylinder body, 200 - negative pressure suction assembly, 210 - piston block, 220 - pull rod, 221 - limiting groove, 222 - soft rubber strip, 230 - handle, 300 - soft drainage tube, 310 - soft limiting head, 400 - traction rope, 500 - pull rope, 600 - limiting assembly, 610 - fixing block, 620 - fastening screw, 630 - limiting block, 700 - transparent observation window, 710 - scale line.

[0022] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. 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 other embodiments obtained by those skilled in the art without creative work under the premise of the present application, all belong to the scope of protection of the present application.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0025] 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 intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, 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 be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art. 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 required by the present application.

[0027] Embodiments

[0028] Reference Figures 1-4 The embodiment provides a negative pressure drainage device, which comprises a drainage cylinder 100, a negative pressure air extraction assembly 200 is arranged in the drainage cylinder 100, the negative pressure air extraction assembly 200 is movably arranged at one end of the drainage cylinder 100, an installation hole is formed in the other end of the drainage cylinder 100, and a soft drainage tube 300 is movably connected to the end of the drainage cylinder 100 through the installation hole. The outer diameter of the soft drainage tube 300 is equal to the diameter of the installation hole, one end of the soft drainage tube 300 extending into the drainage cylinder 100 is connected with a soft limiting head 310, and the diameter of the soft limiting head 310 is greater than the diameter of the installation hole.

[0029] In the embodiment, during operation, the soft limiting head 310 is first inserted into the drainage cylinder 100 through the installation hole, the soft limiting head 310 is deformed when passing through the installation hole, and returns to the original state when extending out of the installation hole. At this time, the soft drainage tube 300 is slightly pulled outwards to make the soft limiting head 310 adhere to the inner wall of the drainage cylinder 100, so that the assembly of the soft drainage tube 300 and the drainage cylinder 100 is completed, and the soft limiting head 310 can have a certain sealing property after assembly, preventing subsequent effusion leakage. During use, after the soft drainage tube 300 is punctured into subcutaneous effusion, negative pressure is generated through the negative pressure air extraction assembly 200, so that the effusion is guided into the drainage cylinder 100. After use, the soft drainage tube 300 can be scrapped by pulling the soft drainage tube 300, so that the soft limiting head 310 is pulled out at the same time. At this time, the soft drainage tube 300 which is not easy to clean can be scrapped, and the remaining parts such as the drainage cylinder 100 and the negative pressure air extraction assembly 200 can be used again, improving the utilization rate and reducing the material cost.

[0030] As an optional embodiment, the drainage cylinder 100 comprises a first cylinder body 110 and a second cylinder body 120 connected detachably, the mounting hole is arranged at one end of the first cylinder body 110 away from the second cylinder body 120, and the negative pressure air extraction assembly 200 is movably extended from one end of the second cylinder body 120 away from the first cylinder body 110.

[0031] In the embodiment, the drainage cylinder 100 is designed as a detachable structure of the first cylinder body 110 and the second cylinder body 120, which can be separated into the first cylinder body 110 and the second cylinder body 120 after use, so as to facilitate cleaning and disinfection of the inside of the drainage cylinder 100 and the negative pressure air extraction assembly 200.

[0032] As an optional embodiment, the first cylinder body 110 is provided with a first threaded section at one side away from the mounting hole, and the second cylinder body 120 is provided with a second threaded section corresponding to the first threaded section and threadedly matched with the first threaded section.

[0033] In the embodiment, the first cylinder body 110 and the second cylinder body 120 are designed as a detachable structure connected by threads, which facilitates assembly and disassembly. It should be noted that the first threaded section can be an external threaded section or an internal threaded section, and the second threaded section is an internal threaded section or an external threaded section matched with the first threaded section.

[0034] As an optional embodiment, the soft limiting head 310 is connected with a plurality of traction ropes 400 at one end away from the soft drainage tube 300, the plurality of traction ropes 400 are arranged in a ring array around the center of the soft limiting head 310, and the plurality of traction ropes 400 are twisted to form a pulling rope 500.

[0035] In the embodiment, when the soft drainage tube 300 needs to be installed, the pulling rope 500 is first stretched into the first cylinder body 110, at this time, the first cylinder body 110 and the second cylinder body 120 are not assembled, the pulling rope 500 is pulled from the other side of the first cylinder body 110, and the soft drainage tube 300 is pulled from the other side at the same time, so as to pull the traction rope 400, so that the soft limiting head 310 is deformed and reduced, so as to be inserted into the mounting hole, then the pulling rope 500 is continuously pulled, so that the soft limiting head 310 is pulled into the first cylinder body 110 from the mounting hole, so as to facilitate quick installation of the soft limiting head 310 with a larger diameter into the first cylinder body 110, then the first cylinder body 110 and the second cylinder body 120 are assembled, and the traction rope 400 and the pulling rope 500 are left in the first cylinder body 110, which is convenient and fast.

[0036] As an optional embodiment, the negative pressure air extraction assembly 200 comprises a piston block 210 movably attached to the inner wall of the drainage cylinder 100, the piston block 210 is connected with a pull rod 220, the pull rod 220 movably penetrates one end of the drainage cylinder 100 away from the mounting hole and is connected with a handle 230.

[0037] In the embodiment, when drainage is needed, the handle 230 is manually pulled from outside, the pull rod 220 pulls the piston block 210 outward, thereby generating negative pressure to guide the subcutaneous effusion into the drainage cylinder 100, which is convenient and fast.

[0038] As an optional embodiment, the pull rod 220 is provided with a strip-shaped limiting groove 221 along the length direction of the pull rod 220, and the drainage cylinder 100 is provided with a limiting assembly 600 at the end away from the mounting hole, which is used to extend into the limiting groove 221 to generate pressure on the pull rod 220, so as to fix the pull rod 220 at the corresponding position.

[0039] In the embodiment, when a certain amount of effusion is drained, the pull rod 220 pulls the piston block 210 to the corresponding position, and the limiting assembly 600 extends into the limiting groove 221 of the pull rod 220, thereby generating pressure on the pull rod 220 to fix the pull rod 220 at the corresponding position, so that the operator does not need to hold the pull rod 220 all the time, thereby reducing the operation difficulty of the operator and facilitating other surgical operations.

[0040] As an optional embodiment, the limiting assembly 600 includes a fixed block 610 connected to the outer wall of the drainage cylinder 100, a fastening screw 620 threaded through the fixed block 610, and a limiting block 630 movably connected to the bottom of the fastening screw 620 and matched with the limiting groove 221.

[0041] In the embodiment, when the pull rod 220 needs to be fixed, the fastening screw 620 is screwed down to insert the limiting block 630 into the limiting groove 221. Since the limiting block 630 is movably connected to the bottom of the fastening screw 620 (through a bearing or other movable part), the limiting block 630 does not rotate with the fastening screw 620. Therefore, the fastening screw 620 is screwed until the limiting block 630 is inserted into the bottom of the limiting groove 221, so that the limiting block 630 tightly presses against the pull rod 220 to generate pressure, thereby limiting and fixing the pull rod 220, which is convenient and fast.

[0042] As an optional embodiment, the limiting groove 221 is provided with soft rubber strips 222 on both inner side walls along the length direction of the limiting groove 221, and the limiting block 630 is attached between the two soft rubber strips 222.

[0043] In the embodiment, the width of the limiting block 630 is slightly larger than the distance between the two soft rubber strips 222, so that the two soft rubber strips 222 are extruded and deformed when the limiting block 630 is inserted therebetween, thereby generating a larger friction force on the limiting block 630, so that the limiting block 630 is not easy to slip, and the limiting and fixing firmness of the pull rod 220 is further improved.

[0044] As an optional embodiment, the outer wall of the drainage tube 100 is provided with a strip-shaped transparent observation window 700 along the length direction of the drainage tube 100, and the transparent observation window 700 is provided with a plurality of scale lines 710 along the length direction of the transparent observation window 700.

[0045] In the embodiment, the amount of drainage of the accumulated liquid in the drainage tube 100 can be observed through the transparent observation window 700, and the amount of drainage can be accurately controlled through the scale lines 710, so as to meet some special requirements of controlling the amount of drainage of the accumulated liquid, and the application range is wide.

[0046] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A negative pressure wound drainage device, characterized in that, The drainage cylinder is internally provided with a negative pressure air extraction assembly, which is movably extended from one end of the drainage cylinder, and the other end of the drainage cylinder is provided with a mounting hole, and the end of the drainage cylinder is movably connected with a soft drainage tube through the mounting hole, the outer diameter of the soft drainage tube is equal to the diameter of the mounting hole, and the end of the soft drainage tube extended into the drainage cylinder is connected with a soft limiting head, and the diameter of the soft limiting head is greater than the diameter of the mounting hole.

2. The negative pressure wound drainage device of claim 1, wherein, The drainage cylinder comprises a first cylinder body and a second cylinder body which are detachably connected, the mounting hole is arranged at the end of the first cylinder body away from the second cylinder body, and the negative pressure air extraction assembly is movably extended from the end of the second cylinder body away from the first cylinder body.

3. The negative pressure wound drainage device of claim 2, wherein the adhesive is a pressure sensitive adhesive. The side of the first cylinder body away from the mounting hole is provided with a first threaded segment, and the corresponding side of the second cylinder body is provided with a second threaded segment which is threadedly matched with the first threaded segment.

4. The negative pressure wound drainage device of claim 2 or 3, wherein the adhesive is a pressure sensitive adhesive. The end of the soft limiting head away from the soft drainage tube is connected with a plurality of traction ropes, the plurality of traction ropes are arranged in a ring array around the center of the soft limiting head, and the plurality of traction ropes are twisted to form a pull rope.

5. The negative pressure wound drainage apparatus of claim 1, wherein, The negative pressure air extraction assembly comprises a piston block movably attached to the inner wall of the drainage cylinder, the piston block is connected with a pull rod, the pull rod is movably penetrated through the end of the drainage cylinder away from the mounting hole and connected with a handle.

6. The negative pressure wound drainage device of claim 5, wherein the adhesive is a pressure sensitive adhesive. The pull rod is provided with a strip-shaped limiting groove along the length direction of the pull rod, the end of the drainage cylinder away from the mounting hole is provided with a limiting assembly, and the limiting assembly is used to extend into the limiting groove to generate pressure on the pull rod to fix the pull rod at a corresponding position.

7. The negative pressure wound drainage device of claim 6, wherein the adhesive is a pressure sensitive adhesive. The limiting assembly comprises a fixed block connected to the outer wall of the drainage cylinder, a fastening screw is threadedly penetrated through the fixed block, and the bottom of the fastening screw is movably connected with a limiting block matched with the limiting groove.

8. The negative pressure wound drainage device of claim 7, wherein the adhesive is a pressure sensitive adhesive. The two inner side walls of the limiting groove along the length direction of the limiting groove are both provided with soft rubber strips, and the limiting block is attached between the two soft rubber strips.

9. The negative pressure wound drainage apparatus of claim 1, wherein, The outer wall of the drainage cylinder is provided with a strip-shaped transparent observation window along the length direction of the drainage cylinder, and the transparent observation window is provided with a plurality of scale lines along the length direction of the transparent observation window.

Images