CN210096562U

CN210096562U - Multicomponent premixing injection apparatus with recirculation assembly

Info

Publication number: CN210096562U
Application number: CN201920359284.1U
Authority: CN
Inventors: 王英杰; 翁习生; 梁瑞政
Original assignee: Beijing University of Chemical Technology; Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Current assignee: Beijing University of Chemical Technology; Peking Union Medical College Hospital Chinese Academy of Medical Sciences
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2020-02-21
Anticipated expiration: 2029-03-20

Abstract

The utility model discloses a multicomponent premixing injection device with a backflow component, which comprises a multicomponent premixing injection device and a backflow device; the multi-component premixing injection device comprises a first injection device, a second injection device, a push rod and a sealing film; the second injection device is arranged in the first injection device and can slide in the first injection device; the front end of the second injection device is provided with a liquid discharge hole; the push rod is arranged in the second injection device and can slide in the second injection device; sealing the liquid discharge hole by a sealing film; the push rod pushes the liquid in the second injection device forwards to break the sealing film; the backflow device comprises a suck-back component and a connecting component; the back suction component comprises a back suction cylinder and a pull rod; the connecting assembly comprises a traction belt and a supporting rod; the traction belt passes through the support rod, one end of the traction belt is connected with the second injection device, and the other end of the traction belt is connected with the pull rod. The utility model discloses simple structure, convenient operation, but the multicomponent injection medicine of flash mixed and can suck back extracellular fluid in the injection.

Description

Multicomponent premixing injection apparatus with recirculation assembly

Technical Field

The utility model relates to the field of medical equipment, concretely relates to multicomponent of taking return current subassembly injection apparatus that mixes in advance.

Background

When some patients are treated, the multi-component medicine compatibility is needed to achieve better curative effect, and the injection frequency of the patients can be reduced. However, many drugs may undergo chemical reactions if they are mixed for a long time, and thus the drug efficacy is affected, and thus an injection device capable of separately dispensing the drugs of different required components and rapidly mixing the same before injection is required.

For patients with early femoral head necrosis, the core decompression and bone graft are generally adopted for clinical treatment, and the specific operations are as follows: the kirschner wire is used for filling autologous bone or allogeneic bone after being punched (for example, filling the autologous bone or the allogeneic bone through injecting biological materials such as bone cement), but in the bone filling process, the pressure in the medullary cavity can rise again, and the increased medullary cavity pressure can reduce the blood supply of the femoral head, so that the treatment of femoral head necrosis is not facilitated.

Among the known syringes there are also syringes for multi-component materials, such as CN106457173A, which relates to syringes for multi-component materials, methods for activating syringes, mixing and dispensing apparatuses and multi-component cartridges, but they are complicated in structure, inconvenient in operation, costly in one-time use, and not practical in production. For another example, CN204972546U relates to a mother-son type double-tube medicine mixing syringe, which has multiple injection heads, is large in volume, inconvenient to use and place in limited operation fields, and further, cannot uniformly and effectively mix multiple medicine components; in addition, no effective means or device for reducing or balancing the pressure in the medullary cavity during injection of the medullary cavity has been found in the prior art.

Disclosure of Invention

An object of the utility model is to provide a but simple structure, convenient operation rapid mixing multicomponent injection medicine and can suck back the injection device of blood or tissue fluid etc. in the injection, also reduce the infection risk when reducing the operation step.

One aspect of the present invention provides a multicomponent premixing injection device with a backflow component, which comprises a multicomponent premixing injection device and a backflow device arranged side by side;

the multi-component premixing injection device comprises a first injection device, a second injection device, a push rod and a sealing film; the first injection device is cylindrical, one end of the first injection device is provided with an opening for injection, and the other end of the first injection device is provided with an opening for placing the second injection device; the second injection device is cylindrical and is arranged in the first injection device and can slide in the first injection device; the front end of the second injection device is provided with a liquid discharge hole, and the rear end of the second injection device is provided with an opening for placing the push rod; the push rod is arranged in the second injection device and can slide in the second injection device; the sealing film closes the liquid discharge hole; pushing the liquid in the second injection device forward by the push rod can break the sealing membrane;

the backflow device comprises a suck-back component and a connecting component; the back suction assembly comprises a back suction barrel and a pull rod; the connecting assembly comprises a traction belt and a supporting rod; the pull rod is arranged in the suck-back cylinder and can slide in the suck-back cylinder; the traction belt penetrates through the support rod, one end of the traction belt is connected with the second injection device, and the other end of the traction belt is connected with the pull rod; the support rod is arranged between the multicomponent premixing injection device and the reflux device.

Above multicomponent of taking return current subassembly mixes injection apparatus in advance, preferably, the inside joint portion that still is provided with of second injection apparatus, joint portion can the push rod pushes completely behind the second injection apparatus, joint push rod rear end makes the push rod longitudinal position fixed, can not slide.

The multi-component premixing injection device with the backflow component preferably further comprises a protective cap, wherein the protective cap is arranged at the opening for installing the injection needle, and the medicine is prevented from overflowing during the medicine mixing process.

In the above-described multicomponent premixing injection device with a backflow component, the first injection device is preferably divided into a first injection device body and a first injection device eccentric portion, and the first injection device eccentric portion has a cylindrical structure with a diameter smaller than that of the first injection device body.

The above-described multi-component premix injection apparatus with a return assembly preferably has at least a portion of the second injection apparatus being a transparent material.

In the above-described multicomponent premixing injection device with a recirculation assembly, preferably, at least a portion of the first injection device body is made of a transparent material.

In the multicomponent premixing injection device with a backflow component as described above, preferably, the suck-back cylinder includes a suck-back cylinder body and a suck-back eccentric portion, and an opening position of the suck-back eccentric portion for suck-back is closer to the first injection device body than an opening position of the first injection device for injection.

In the multicomponent premixing injection device with the backflow component, the opening position of the suck-back eccentric part for suck-back is preferably covered with a suck-back protective cap.

In the multicomponent premixing injection device with the backflow component, preferably, the support rod is internally provided with a pulley, and the traction belt can slide on the pulley, so that the friction between the traction belt and the support rod can be reduced.

Advantageous effects

The utility model discloses a multicomponent of taking backward flow subassembly mixes injection device in advance, the device is through the second medicine of waiting to inject of push rod extrusion second in the injection device, makes the second medicine of waiting to inject break through the seal membrane, flows out from the outage, gets into first injection device and mixes with the first medicine of waiting to inject in the first injection device, after the abundant mixing, promotes the second injection device again and can inject the medicine after mixing into the patient and need the position; when the second injection device is pushed, the traction belt connected with the second injection device is pulled to drive the pull rod connected with the other end of the traction belt, the pull rod is gradually pulled out from the suck-back barrel, an opening of the suck-back eccentric part for suck-back sucks extra liquid such as extracellular fluid and the like into the suck-back barrel under the action of negative pressure, and particularly, when the medullary cavity is injected, medullary cavity blood can be sucked out while being injected, so that the medullary cavity can be effectively decompressed, the pressure of the medullary cavity is prevented from being overhigh, and the treatment effect is reduced.

The scheme that this application designed joint portion can also effectually prevent that the liquid that first injection device intracavity mixes the completion from flowing back to second injection device through the outage when injecting, and it is convenient to bring for the art person, makes the art person focus on more attention on the crucial treatment step.

The multi-component premixing injection device is simple in structure, low in manufacturing cost and simple and convenient to operate, only medical workers need to press twice, and the injector can be used as a medical consumable for low-value medicines; for medical products with high added values, such as bone cement, the product can be pre-stored in the injector, the injector is directly opened for mixing when in use, and then injection is carried out, so that the operation steps of medical staff are reduced, and the infection risk of patients is reduced. In addition, for the limited operation visual field in the operation, the eccentrically arranged syringe needle and the eccentrically arranged suck-back part reduce the visual field blind area of the operator, thereby increasing the operation simplicity and reducing the occurrence of operation accidents to a certain extent.

Drawings

FIG. 1 is a schematic diagram of a multi-component premix injection apparatus with a return assembly according to the present invention;

FIG. 2 is a front view of the multi-component premix injection apparatus with a return assembly of the present invention;

FIG. 3 is a top plan view of the multi-component premix injection apparatus with a return assembly of the present invention;

FIG. 4 is a bottom view of the multi-component premix injection apparatus with a return assembly of the present invention;

FIG. 5 is a right side view of the multi-component premix injection apparatus with a return assembly of the present invention;

FIG. 6 is a left side view of the multi-component premix injection apparatus with a return assembly of the present invention;

FIG. 7 is a cross-sectional view of the multi-component premix injection apparatus with a return assembly of the present invention taken along the direction of FIG. 3A-A;

FIG. 8 is an enlarged partial schematic view of the block portion of FIG. 7 of the multi-component premix injection apparatus with a return assembly according to the present invention;

FIG. 9 is an enlarged partial schematic view of the pulley portion of the multicomponent premixing injection apparatus with recirculation assembly according to the present invention;

FIG. 10 is an enlarged, fragmentary schematic view of a second injection device of embodiment 2 of the multi-component premix injection apparatus with a return assembly according to the present invention;

FIG. 11 is a cross-sectional view of a second injection device of embodiment 2 of the multi-component premix injection apparatus with a return assembly of the present invention taken along the direction of FIGS. 3B-B;

FIG. 12 is a left side view of a second injection device of embodiment 2 of the multi-component premix injection apparatus with a return assembly of the present invention;

FIG. 13 is an enlarged partial cross-sectional view in the direction of FIG. 3A-A of the plunger of embodiment 2 of the multiple component premix injection apparatus with a return assembly according to the present invention in the engaged state;

the reference numbers are as follows:

the injection device comprises a first injection device 1, a first injection device eccentric part 11, an opening 12 for injection, a protective cap 2, a second injection device 3, a liquid discharge hole 31, a push rod clamping part 32, a push rod 4, a sealing film 5, a suck-back barrel 6, a suck-back eccentric part 61, a pull rod 7, a connecting part 8, a support rod 9, a pulley 91 and a traction belt 10.

Detailed Description

The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

Example 1

Referring to fig. 1 to 8, the present embodiment provides a multicomponent premixing injection device with a backflow assembly, which includes a multicomponent premixing injection device and a backflow device arranged side by side;

the multi-component premixing injection device comprises a first injection device 1, a second injection device 3, a push rod 4 and a sealing film 5; the first injection device 1 is cylindrical, one end of the first injection device is provided with an opening 12 for injection, and the other end of the first injection device is provided with an opening for placing the second injection device 3; the second injection device 3 is cylindrical, is arranged in the first injection device 1 and can slide in the first injection device 1; the front end of the second injection device 3 is provided with a liquid discharge hole 31, and the rear end is provided with an opening for placing the push rod 4; the push rod 4 is arranged inside the second injection device 3 and can slide inside the second injection device 3; the sealing film 5 closes the liquid discharge hole 31; specifically, the sealing membrane is a film which can prevent the second injection solution in the second injection device 3 from being mixed with the first injection solution in the first injection device 1 and can be broken when the second injection solution is extruded by the push rod 4, and the sealing membrane can be made of materials such as polyurethane, polyvinyl chloride (PVC), polyamide (nylon) and the like. The push rod 4 pushes the liquid in the second injection device 3 forwards to break the sealing membrane 5;

the backflow device comprises a suck-back component and a connecting component; the back suction component comprises a back suction cylinder 6 and a pull rod 7; the connecting assembly comprises a traction belt 10 and a support rod 9; the pull rod 7 is arranged in the suck-back cylinder 6 and can slide in the suck-back cylinder 6; the traction belt 10 passes through the support rod 9, one end of the traction belt is connected with the second injection device 3, and the other end of the traction belt is connected with the pull rod 7; the supporting rod 9 is arranged between the multicomponent premixing injection device and the reflux device; specifically, a connecting part 8 is arranged between the first injection device 1 and the suck-back barrel 6, and a support rod 9 is arranged on the connecting part 8. The length of the support rod 9 and the pull strip 10 is such that when the second injection device 3 is pushed to the foremost end of the body of the first injection device 1 and can not be pushed any more, the pull strip 10 pulls the pull rod 7 to a limit position where the pull rod 7 does not slip out of the suck back cylinder 6. The diameter of the suction cylinder 6 and the limit position of the pull rod 7 can be set according to the amount of liquid to be sucked back in actual operation.

The first injection device 1 of the embodiment is divided into a first injection device body 1 and a first injection device eccentric part 11, the first injection device eccentric part 11 is a cylindrical structure with the diameter smaller than that of the first injection device 1 body, the first injection device eccentric part 11 occupies 1/3-1/2 of the longitudinal length of the first injection device 1, and the design of the first injection device eccentric part 11 enables the injection device to be more attached to a part to be injected (particularly, when medicine or other medical products such as bone cement are injected in a limited operation visual field, the visual field blind area of an operator is greatly reduced due to eccentric arrangement, and in addition, after a medullary core decompression operation of an early femoral head necrosis patient, the injector can be more attached to a femoral shaft to inject biological materials), so that the injection operation is easier, and the injected medicine can enter more smoothly. The first injection device 1 of the present embodiment further comprises a protective cap 2, the protective cap 2 is covered on the opening 12 for mounting the injection needle, and can be in various common detachable connection manners such as clamping, screwing and the like, and is used for protecting the opening 12 for mounting the injection needle of the first injection device 1, so as to prevent contamination and medicine overflow during the mixing process.

At least one part of the second injection device 3 is made of transparent material, and at least one part of the body of the first injection device 1 is made of transparent material, preferably, the first injection device 1 and the second injection device 3 are made of transparent material, so that the medical staff can observe the mixing condition and the dosage condition of the medicines during operation.

The suck back cylinder 6 in the present embodiment includes a suck back cylinder 6 body and a suck back eccentric portion 61, and the opening position of the suck back eccentric portion 61 for suck back is closer to the first injection device 1 body than the opening 12 of the first injection device 1 for injection. The purpose of the design of the eccentric configuration is to avoid sucking out the just injected drug or biological material, as in the case of the eccentric portion 11 of the first injection device, compared to the position of the opening 12 for injection of the first injection device 1, further away from the site to be injected. The opening of the suck-back eccentric part 61 for suck-back is also covered with a suck-back protective cap (not shown in the figure), which can be various detachable connection methods such as clamping, screwing and the like, so as to avoid pollution.

When in use, the push rod 4 is pushed, so that the front end of the push rod 4 pushes the second injection to be injected in the second injection device 3, the second injection to be injected extrudes the sealing membrane 5 at the liquid discharge hole 31, the sealing membrane 5 is extruded and broken under the action of pressure, the second injection to be injected flows into the first injection device 1 through the liquid discharge hole 31, the first injection device 1 can be reversed front and back for uniform mixing with the first solution to be injected in the first injection device 1, after the first solution to be injected and the second solution to be injected are uniformly mixed, the second injection device 3 is pushed to inject the mixed injection in the first injection device 1 into the part to be injected of the patient, the traction belt 10 is driven while the second injection device 3 is pushed, the traction belt 10 pulls the pull rod 7 again, the pull rod 7 is gradually pulled out from the suck-back cylinder 6, negative pressure is formed in the suck-back cylinder 6 and the suck-back eccentric part 61, and therefore blood, tissue fluid and the like can be sucked. The utility model can be used as medical consumables for low-value medicines (such as dexamethasone and lidocaine for local sealing) (firstly, one medicine is inhaled through the first injection device 1, then the other medicine is inhaled, and injection of a designated part is carried out after the medicines are uniformly mixed in the first injection device 1); for medical products with high added value, such as bone cement, materials to be injected can be stored in the injection device in advance, sterile packaging is carried out independently after disinfection and sterilization, the outer package is directly torn open during use, the injection device is opened, the materials are mixed uniformly and then injected, extracellular fluid and the like can be sucked out during injection, and particularly, the injection and decompression can be carried out on the medullary cavity during medullary cavity injection, so that the operation steps of medical workers and the infection risk of patients are reduced.

Example 2

Referring to fig. 9 to 13, the second injection device 3 of the present embodiment is further provided with a latch portion 32 at the opening for inserting the push rod 4, and the latch portion 32 may be a latch piece, a latch barb, or the like, so that the rear end of the push rod 4 can not be retracted after pushing through the latch portion 32.

The top end of the supporting rod 9 in the embodiment is also provided with a pulley 91, the traction belt 10 can slide on the pulley 91, the friction between the traction belt 10 and the supporting rod 9 can be reduced, and the operation is more convenient and smoother. The other structure is the same as that of embodiment 1, and the description will not be repeated.

During the use, promote push rod 4, make the second of push rod 4 front end promotion second injection device 3 wait to inject liquid, the second waits that the injection extrudees seal membrane 5 of outage 31 department, seal membrane 5 is broken by the pressure effect, the second waits that the injection flows into first injection device 1 through outage 31, mix with the first injection device 1 that waits of first injection device 1, push rod 4 pushes the rear end of push rod 4 through joint 32 just when contacting outage 31, push rod 4 is blocked by joint 32 and can not retreat, after first injection device that waits with the second injection liquid misce bene, promote second injection device 3 and inject the mixed injection in first injection device 1 into the patient and wait to inject the position, push rod 4 can not retreat because of reverse pressure after being blocked by joint 32, block up outage 31 simultaneously, the back flow of the mixed liquid of waiting to inject has been avoided.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A multicomponent premixing injection device with a backflow component is characterized by comprising a multicomponent premixing injection device and a backflow device which are arranged side by side;

2. The multi-component premixing injection device with a backflow assembly of claim 1 wherein the second injection device is further provided with a clamping portion therein, and the clamping portion can clamp the rear end of the push rod after the push rod is completely pushed into the second injection device, so that the push rod is fixed in longitudinal position and cannot slide.

3. The multi-component premix injection apparatus with a return assembly of claim 1, further comprising a protective cap disposed at the opening for mounting an injection needle.

4. The multi-component premix injection apparatus with a backflow assembly of claim 1, wherein the first injection device is divided into a first injection device body and a first injection device eccentric, the first injection device eccentric being a cylindrical structure having a smaller diameter than the first injection device body.

5. The multi-component premix injection apparatus with a return assembly of claim 1 wherein at least a portion of the second injection apparatus is a transparent material.

6. The multi-component premix injection apparatus with a backflow assembly of claim 4, wherein at least a portion of the first injection apparatus body is a transparent material.

7. The multi-component premix injection apparatus with a flashback assembly of claim 1, wherein the flashback cartridge comprises a flashback cartridge body and a flashback eccentric, the opening location of the flashback eccentric for flashback being closer to the first injection apparatus body than the opening location of the first injection apparatus for injection.

8. The multicomponent premixing injection device with recirculation assembly of claim 7 wherein the opening of the suck back eccentric for suck back is also capped with a suck back cap.

9. The multi-component premix injection apparatus with a return assembly of claim 1 wherein a pulley is provided within the support rod, the pull belt being slidable on the pulley.