CN219398519U - Double-cavity injection needle - Google Patents

Abstract

The utility model provides a double-cavity injection needle which comprises a front handle, a rear handle and an outer tube, wherein the front handle is used for connecting the outer tube with the rear handle, the front end of the rear handle is connected with an inner tube, the inner tube penetrates through the front handle and is sleeved in the outer tube, the front end of the inner tube is provided with a needle head, the rear handle can be operated to move forwards and backwards relative to the front handle so as to drive the needle head to be pushed out or retracted, and the rear end of the rear handle is detachably connected with an injection connecting assembly which comprises a first injection tube and a second injection tube; the inner tube is of a through design and is divided into two liquid injection channels through the dividing piece, and the first injection tube and the second injection tube are in single-to-single communication with the two liquid injection channels. The double-cavity injection needle can achieve the effect of multiple purposes of one needle, has good application prospect for simultaneous injection or time-sharing injection of different liquid medicines, does not need to replace instruments in clinical use, is simple to operate, is easy to assemble and produce, and is suitable for mass rapid production.

Description

Double-cavity injection needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a double-cavity injection needle.

Background

The endoscope injection needle is usually matched with an endoscope for use, is widely used for operations such as excision of polyps and tumors under gastroscopes and enteroscopes in gastroenterology, has a crucial effect in the treatment process of varicose vein operation of esophagus and stomach, and is widely used in clinical application. However, there is an increasing clinical need for a multi-lumen injection needle, and when different medical solutions need to be injected into a lesion site, a common disposable single-lumen injection needle cannot be reused, and only one injection needle can be withdrawn after the use of the single injection needle, and another injection needle is replaced.

In the prior art, as disclosed in CN115317056a, a double-cavity injection needle is provided, in which a double-cavity injection tube is located in the middle of a handle, which is inconvenient to replace and needs to be used in combination with a hydraulic device. The structure is complicated, and the production assembly requirement is high, is inconvenient for batch production.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to overcome the defects in the prior art, the utility model provides the double-cavity injection needle which is simple in structure and convenient to produce.

The technical scheme adopted for solving the technical problems is as follows: the double-cavity injection needle comprises a front handle, a rear handle and an outer tube, wherein the front handle is used for connecting the outer tube with the rear handle, the front end of the rear handle is connected with an inner tube, the inner tube penetrates through the front handle and is sleeved in the outer tube, the front end of the inner tube is provided with a needle head, and the rear handle can be operated to move back and forth relative to the front handle so as to drive the needle head to be pushed out or retracted;

the rear end of the rear handle is detachably connected with an injection connecting assembly, and the injection connecting assembly comprises a first injection tube and a second injection tube;

the inner tube is of a through design and is divided into two liquid injection channels through the dividing piece, and the first injection tube and the second injection tube are in single-to-single communication with the two liquid injection channels.

Further, an initial positioning clamping point and a limiting positioning clamping point are arranged on the front handle, and salient points matched with the initial positioning clamping point and the limiting positioning clamping point are arranged on the outer side of the inner tube.

Further, the front handle and the rear handle are detachably connected through a buckle.

Further, the front end of the outer tube is fixedly provided with a guide head, the rear end of the guide head is sleeved in the outer tube, and the outer side of the rear end of the guide head is provided with a fixing barb.

Further, the inclination direction of the fixing barbs is opposite to the extending direction of the needle head.

Further, the rear end of the needle extends into the inner tube, and the inner wall of the front end of the inner tube is provided with a limiting barb.

Further, the inclination direction of the limit barbs is opposite to the extending direction of the needle head.

Further, the first injection tube and the second injection tube are internally provided with one-way valves.

The double-cavity injection needle has the beneficial effects that the injection connecting component is detachably connected to the rear end of the rear handle, so that the double-cavity injection needle can achieve the effect of one needle with multiple purposes, has good application prospects for simultaneous injection or time-sharing injection of different liquid medicines in clinical application scenes, does not need to replace instruments in the clinical use process, is simple to operate, is easy to assemble and produce, and is suitable for mass rapid production.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a front view of a dual lumen injection needle of the present utility model;

FIG. 2 is a front view (omitting the needle head) of one of the use states of the double-lumen injection needle of the present utility model;

FIG. 3 is a front view (omitting the needle) of the second state of use of the dual-lumen injection needle of the present utility model;

FIG. 4 is a schematic cross-sectional view of the needle of the dual chamber needle of the present utility model;

fig. 5 is a schematic structural view of an injection connection assembly of the double-lumen injection needle of the present utility model.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

A dual-cavity injection needle as shown in fig. 1 to 3 is a preferred embodiment of the present utility model, and the dual-cavity injection needle of the present embodiment includes a front handle 3, a rear handle 5 and an outer tube 1, wherein the rear handle 5 is provided with an inner tube 51 in a connecting manner, and the inner tube 51 passes through the front handle 3 and is sleeved in the outer tube 1. The outer tube 1 is connected at the front end of the front handle 3, and the front end of the front handle 3 is provided with a sheath tube 2, specifically, the front end of the sheath tube 2 is fixedly connected with the rear end of the outer tube 1, for example, can be fixed by glue.

Referring to fig. 1 and fig. 3-4, the front end of the inner tube 51 is provided with a needle 52, the front handle 3 and the rear handle 5 are detachably connected by a buckle 4, the rear handle 5 is operated to move back and forth relative to the front handle 3, and a group of positioning clamping points are arranged on the corresponding front handle 3, namely: initial anchor point 31 and limit anchor point 32. The bump (not shown) matched with the positioning clamping point is arranged on the outer side of the inner tube 51, when the double-cavity injection needle of the embodiment is packaged and leaves a factory, the bump is matched with the initial positioning point 31, a click sound can be generated or a tactile feedback signal is given to an operator, at the moment, the needle head 52 does not extend out of the outer tube 1, the needle head 52 is effectively protected from being knocked and damaged, and the puncture effect is prevented from being influenced. With the handle 5 moving to the needle 52 side after operation, the needle 52 is gradually pushed out of the outer tube 1, and when the protruding point is matched with the limit positioning point 32, a click sound is given again or a tactile feedback signal is given to the operator, so that the operator is reminded that the needle 52 reaches the limit position and cannot be pushed forward any more.

Referring to fig. 4, the inner tube 51 is a dual-lumen tube that is disposed through, specifically, a partition 53 is disposed inside the inner tube 51 to partition the inner tube 51 into 2 liquid injection channels 55, and the front handle 3 and the rear handle 5 are hollow structures for the outer tube 1 and the inner tube 51 to pass through or move.

Referring to fig. 1, 4 and 5, the rear end of the inner tube 51 is disposed above the rear handle 5, and the rear end of the rear handle 5 is detachably connected with an injection connection assembly 6, and the injection connection assembly 6 includes a first syringe 61 and a second syringe 62, the first syringe 61 and the second syringe 62 are in single-to-single communication with the two injection passages 55 of the inner tube 51, and the liquid medicine injected from the first syringe 61 and the second syringe 62 is separated by the partition 53.

Referring to fig. 4, a guide head 11 is fixedly arranged at the front end of the outer tube 1, the rear end of the guide head 11 is sleeved in the outer tube 1, a fixing barb 111 is arranged at the outer side of the rear end of the guide head 11, the inclination direction of the fixing barb 111 is opposite to the needle outlet direction of the needle 52, the guide head 11 is prevented from being pushed out when the needle 52 is pushed out, on the other hand, the rear end of the needle 52 extends into the inner tube 51, similarly, in order to prevent the needle 52 from falling off, a limit barb 541 is arranged on the inner wall of the front end 54 of the inner tube 51, and the inclination direction of the limit barb 541 is opposite to the needle outlet direction of the needle 52.

According to another aspect of this embodiment, in clinical use, two different solutions are injected simultaneously, typically one solution is injected first, and after a period of time, the other solution is injected again, and the solution is not allowed to mix, so as to avoid adverse reactions. On the other hand, in order to avoid excessive contact between the liquid medicine and the air and large difference between the cavity of the human body and the external pressure, discomfort is caused to the patient, the two injection pipes of the injection connecting assembly 6 are internally provided with one-way valves 612, the one-way valves 612 can be duckbill-type one-way valves, and under the condition of no pressure in the interior, the outlet of the duckbill-type one-way valves is folded under the self elastic action; with the gradual increase of the internal pressure (the external liquid injection device injects liquid into the duckbill type one-way valve), the duckbill outlet gradually increases, and the liquid can be discharged at a high flow rate. For example, when the first syringe 61 is not used, the one-way valve 612 is provided, so that the reverse flow of the body fluid in the body cavity can be prevented, and the occurrence of a pressure difference can be avoided. The rear ends of the two injection tubes are also provided with luer connectors 611, so that the two injection tubes are convenient to be in butt joint fit with the injection needle cylinder through the luer connectors 611, and the injection process is completed.

In clinical use, the double-cavity injection needle is used for conveying the outer tube 1 to the focus position of a patient through an endoscope, then adjusting the positions of the rear handle 5 and the front handle 3, controlling and adjusting the needle outlet length of the needle 52, accessing the injection medium device at the rear end of the injection connecting component 6, accessing one of the injection tubes, such as the first injection tube 61, when a liquid medicine, such as physiological saline, needs to be injected, the liquid medicine rushes out of the check valve 612 to reach the position required by the patient through one of the injection cavity channels 55, and the check valve 612 is automatically closed when the liquid medicine injection is stopped, so that the liquid medicine and the body fluid cannot flow out of the first injection tube 61 in a countercurrent mode.

According to the double-cavity injection needle of the embodiment, the injection connecting component 6 is detachably connected to the rear end of the rear handle 5, so that the double-cavity injection needle can achieve the effect of multiple purposes, has good application prospects for simultaneous injection or time-sharing injection of different liquid medicines in clinical application scenes, does not need to replace instruments in the clinical use process, is simple to operate, is easy to assemble and produce, and is suitable for mass rapid production.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (8)

1. The utility model provides a two-chamber injection needle, includes preceding handle, back handle and outer tube, its characterized in that:

the front handle is used for connecting the outer tube with the rear handle, the front end of the rear handle is connected with an inner tube, the inner tube penetrates through the front handle and is sleeved in the outer tube, the front end of the inner tube is provided with a needle head, and the rear handle can be operated to move back and forth relative to the front handle so as to drive the needle head to be pushed out or retracted;

the rear end of the rear handle is detachably connected with an injection connecting assembly, and the injection connecting assembly comprises a first injection tube and a second injection tube;

the inner tube is of a through design and is divided into two liquid injection channels through the dividing piece, and the first injection tube and the second injection tube are in single-to-single communication with the two liquid injection channels.

2. A dual chamber needle as defined in claim 1, wherein: the front handle is provided with an initial positioning clamping point and a limiting positioning clamping point, and the outer side of the inner tube is provided with a salient point matched with the initial positioning clamping point and the limiting positioning clamping point.

3. A dual chamber needle as defined in claim 2, wherein: the front handle is detachably connected with the rear handle through a buckle.

4. A dual chamber needle as defined in claim 1, wherein: the front end of the outer tube is fixedly provided with a guide head, the rear end of the guide head is sleeved in the outer tube, and the outer side of the rear end of the guide head is provided with a fixing barb.

5. A dual chamber needle as defined in claim 4 wherein: the inclination direction of the fixing barb is opposite to the extending direction of the needle head.

6. A dual chamber needle as defined in claim 4 wherein: the rear end of the needle extends into the inner tube, and the inner wall of the front end of the inner tube is provided with a limiting barb.

7. A dual chamber needle as defined in claim 6, wherein: the inclination direction of the limit barb is opposite to the extending direction of the needle head.

8. A dual chamber needle as defined in claim 1, wherein: the first injection tube and the second injection tube are internally provided with one-way valves.