CN215840930U - Auxiliary injection device and puncture kit - Google Patents
Auxiliary injection device and puncture kit Download PDFInfo
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- CN215840930U CN215840930U CN202121812279.5U CN202121812279U CN215840930U CN 215840930 U CN215840930 U CN 215840930U CN 202121812279 U CN202121812279 U CN 202121812279U CN 215840930 U CN215840930 U CN 215840930U
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Abstract
The utility model discloses an auxiliary injection device and a puncture kit, wherein the auxiliary injection device comprises: the auxiliary equipment comprises a first cylinder, a first piston and a spring pressing assembly; the first piston is arranged in the first cylinder and is configured to move along the axial direction of the first cylinder; the first cylinder body is provided with a first axial end cover and a second axial end cover arranged opposite to the first axial end cover; two ends of the elastic pressing component are respectively connected with the first axial end cover and the first piston; and a syringe comprising a second barrel and an injection assembly configured to be movable in an axial direction of the second barrel; the second axial end cover is provided with a second opening, the second cylinder is connected with the first cylinder, and at least one part of the injection assembly is positioned in the first cylinder through the second opening and is connected with the first piston. The technical scheme of the utility model aims to solve the technical problem that the residual substances of the elastic component in the prior art can be mixed with the medical liquid.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to an auxiliary injection device and a puncture kit.
Background
For a variety of reasons, needles and catheters often need to be inserted into a patient's body to deliver medical fluids to the patient. If the needle or catheter does not reach the intended site of injection, it may threaten the patient's life safety or cause serious complications or sequelae to the patient. Currently, a variety of injection devices are used to determine the position of the needle, one of which is to determine pressure change information by observing the position between the plunger and the push rod.
In the existing injection device, an elastic component is additionally arranged in a cavity of a piston and a push rod so as to discriminate pressure change information. However, the elastic component is arranged inside the cavity, and the residual substances of the elastic component may be mixed with the medical liquid and injected into the patient, thereby threatening the life safety of the patient.
SUMMERY OF THE UTILITY MODEL
The main object of the present invention is to provide an auxiliary injection device and a piercing set, aiming at solving the technical problem of the prior art that the residual substance of the resilient member may be mixed with the medical fluid.
To achieve the above object, the present invention provides an auxiliary injection device comprising:
the auxiliary equipment comprises a first cylinder, a first piston, a first push rod and a spring pressing assembly; the first piston is arranged in the first cylinder and is configured to move along the axial direction of the first cylinder; the first barrel has a first axial end cap and a second axial end cap disposed opposite the first axial end cap; two ends of the elastic pressing assembly are respectively connected with the first axial end cover and the first piston; the first push rod is connected with the first piston; the first axial end cover is provided with a first opening, and the first push rod penetrates through the first opening and extends out of the first cylinder; and
a syringe comprising a second barrel and an injection assembly configured to be movable in an axial direction of the second barrel;
wherein the second axial end cap has a second opening, the second barrel is coupled to the first barrel, and at least a portion of the injection assembly is positioned within the first barrel through the second opening and coupled to the first piston.
Optionally, the first barrel comprises a first barrel body and a first push rod which are formed in an axially extending mode; the first piston, a portion of the first barrel, and the first axial end cap define a first cavity; the first push rod is connected with the first piston, and at least one part of the first push rod is positioned in the first cavity; the first axial end cover is provided with a first opening, and the other part of the first push rod extends out of the first cylinder body through the first opening; the elastic pressing component is arranged in the first cavity, and two ends of the elastic pressing component are respectively connected to the first piston and the first axial end cover.
Optionally, the first piston, another portion of the first barrel, and the second axial end cap define a second cavity; at least a portion of the injection assembly is disposed through the second opening and within the second cavity and is coupled to the first piston.
Optionally, the injection assembly comprises a second plunger and a second piston, the second piston is disposed in the second cylinder, the second plunger is connected with the second piston, and the second piston is configured to move along the axial direction of the second cylinder; at least one part of the second push rod is arranged in the second cavity through the second opening hole in a penetrating mode and is connected with the first piston.
Optionally, the second push rod is detachably connected with the first piston.
Optionally, the second axial end cap is removably connected to the first barrel.
Optionally, the second cylinder comprises a second cylinder body formed by extending axially, and the second piston can move axially along the second cylinder body; the moving direction of the second piston is arranged in the same direction as that of the first piston; a portion of the second barrel is connected to the wall of the second opening.
Optionally, the outer wall of the second barrel body is convexly provided with a limiting block, and the limiting block is connected with the second axial end cover.
Optionally, the elastic pressing component is a spring, two ends of the spring are respectively connected to the first piston and the first axial end cover, and the spring is sleeved on the first push rod.
Optionally, the present invention also proposes a puncture kit comprising: a puncture needle and an auxiliary injection device as described above.
In the technical scheme of the embodiment of the utility model, the auxiliary injection device comprises auxiliary equipment and an injection syringe. The syringe may be a conventional syringe, which includes only a second barrel and an injection assembly axially movable in the second barrel to inject the medicine in the second barrel into the body. Compared with the prior art, the injection needle cylinder is not provided with the elastic component, and the penetrating position of the needle head is screened by the aid of the elastic component in the auxiliary equipment, so that residual substances caused by assembling the elastic component cannot exist in the injection needle cylinder, and the technical problems in the prior art are solved. Specifically, the second cylinder of the auxiliary device is connected with the first cylinder, and the second axial end cover of the auxiliary device is provided with a second opening, so that at least one part of the injection assembly can be positioned in the first cylinder through the second opening and is connected with the first piston of the first cylinder, and the injection assembly can be pushed by the movement of the first piston as the first piston can move along the axial direction of the first cylinder; furthermore, the elastic pressing component is connected with the first piston and the first axial end cover of the first cylinder, and the elastic force of the elastic pressing component can force the first piston to move when the needle reaches a specified position, so that the injection component is pushed to move, and the position of the needle is identified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of an auxiliary injection device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of another embodiment of the auxiliary injection device of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The position of the needle head can be identified by detecting the pressure change, so that whether the needle head reaches the preset administration position can be effectively determined. In particular, different cavities or regions of body tissue can impart different degrees of pressure on the needle. When a certain human body part is reached, the pressure resistance of the part is reduced, and the injection pressure in the injector is greater than the pressure of the part, the fluid in the injector is discharged into the cavity, so that the movement of the piston can be recognized by naked eyes to prompt a doctor that the needle head reaches a specified part.
For example, the epidural space is a cavity located between the ligamentum flavum and the dura mater and is a relatively low pressure cavity. In the epidural space puncturing operation, a part of the liquid or physiological saline to be injected is firstly sucked through the injection assembly with the elastic pressing assembly 100c, and then the needle is gradually penetrated into the body of a patient and sequentially passes through the skin, the subcutaneous tissue, the interspinous ligament and the ligamentum flavum to reach the epidural space. Due to the skin, the subcutaneous tissue and the high pressure group area outside the interspinous ligament and the ligamentum flavum, the fluid of the injector can be ensured not to flow out, when the head pierces the epidural space, because the epidural space has lower pressure, the elasticity of the elastic component 100c in the injector is larger than the pressure of the epidural space at the moment, and the piston is pushed, and the doctor can identify the position of the needle through the movement of the piston at the moment.
However, in the prior art, the pressing assembly 100c of the injection device using this discrimination technique is located inside the cavity of the injection device, and in the assembling process, the transportation process and the like, residual substances may exist in the cavity, so that the residual substances are mixed into the injection medicine and injected into the body, which threatens the life safety of the patient.
To solve the above technical problem, referring to fig. 1, an embodiment of the present invention provides an auxiliary injection device, including:
an auxiliary device comprising a first cylinder, a first piston 100b and a biasing assembly 100 c; the first piston 100b is disposed in the first cylinder and configured to move in an axial direction of the first cylinder; the first barrel has a first axial end cap 100f and a second axial end cap 100e disposed opposite the first axial end cap 100 f; the two ends of the suppressing assembly 100c are respectively connected with the first axial end cover 100f and the first piston 100 b; and
a syringe comprising a second barrel and an injection assembly configured to be movable in an axial direction of the second barrel;
wherein the second axial end cap 100e has a second opening, the second barrel is connected to the first barrel, and at least a portion of the injection assembly is located within the first barrel through the second opening and connected to the first piston 100 b.
In the technical scheme of the embodiment of the utility model, the auxiliary injection device comprises auxiliary equipment and an injection syringe. The syringe may be a conventional syringe, which includes only a second barrel and an injection assembly axially movable in the second barrel to inject the medicine in the second barrel into the body. Compared with the prior art, the injection syringe is not provided with the elastic component 100c, and the penetrating position of the needle is screened by the aid of the elastic component 100c in the auxiliary equipment, so that residual substances caused by assembling the elastic component 100c cannot be left in the injection syringe, and the technical problem in the prior art is solved. Specifically, the second cylinder of the accessory is connected to the first cylinder, and the second axial end cap 100e of the accessory has a second opening such that at least a portion of the injection assembly can be located within the first cylinder through the second opening and connected to the first piston 100b of the first cylinder, and the injection assembly can be pushed by the movement of the first piston 100b as the first piston 100b is movable in the axial direction of the first cylinder; further, the pressing assembly 100c is connected to the first piston 100b and connected to the first axial end cap 100f of the first barrel, so that the first piston 100b can be forced to move when the needle reaches a specified position by the elastic force of the pressing assembly 100c, and the injection assembly is pushed to move, so as to discriminate the position of the needle.
As an optional implementation manner of the above embodiment, optionally, the first cylinder includes a first cylinder body 100a and a first push rod 100d formed to extend axially; the first piston 100b, a portion of the first barrel 100a, and the first axial end cap 100f define a first cavity S1; the first push rod 100d is connected to the first piston 100b, and at least a portion of the first push rod 100d is located in the first cavity S1; the first axial end cover 100f has a first opening, and another part of the first push rod 100d extends out of the first cylinder through the first opening; the biasing assembly 100c is disposed in the first cavity S1.
Specifically, the first cylinder further includes a first cylinder body 100a and a first push rod 100d formed by extending in the axial direction; as shown in fig. 1, the first piston 100b is used as a boundary, and the right cavity is a first cavity S1 defined by the first piston 100b, a part of the first cylinder 100a and the first axial end cover 100 f; the biasing assembly 100c is disposed in the first cavity S1, and a portion of the first push rod 100d is also disposed in the first cavity S1, and another portion thereof can extend out of the first barrel 100a through the first opening of the first axial end cap 100 f; by operating the first plunger 100d, the axial position of the first piston 100b and the first barrel 100a can be changed to change the pressure of the biasing assembly 100c, and the position of the injection assembly within the second barrel can also be changed by the first piston 100b to fill the second barrel with medicament.
As an alternative to the above embodiment, the first piston 100b, another portion of the first cylinder, the first cylinder 100a, and the second axial end cap 100e define a second cavity S2; at least a portion of the injection assembly is disposed through the second aperture and within the second cavity S2.
As shown in fig. 1, specifically, the first piston 100b is used as a boundary, and the left cavity is a second cavity S2, which is defined by the first piston 100b, another part of the first cylinder 100a, and a second axial end cover 100 e; at least a portion of the injection assembly is positioned within the second cavity S2 through the second aperture and is coupled to the first piston 100 b. The present invention divides the first cylinder into two chambers by the first piston 100b, and the occupied volumes of the two chambers may be changed according to the operation of the first piston 100b by the first push rod 100 d. When the first push rod 100d pushes the first piston 100b to the position shown in fig. 2, the biasing assembly 100c is in a non-pressure state, the volume occupied by the second cavity S2 is at a minimum, and the medicine in the syringe is injected into the patient; when the first push rod 100d pulls the first piston 100b to the position shown in fig. 1, the biasing assembly 100c is in a compressed state, and the syringe body is filled with fluid and is kept in the syringe body under the balance action of the biasing assembly 100c and the tissues in the patient; when the needle is inserted to a predetermined position, the pressure of the tissue in the patient is reduced, the pressure of the biasing member 100c is released, and the liquid is pushed into the patient, so that the movement of the first piston 100b and the first push rod 100d can be visually observed to clearly indicate the movement.
As an alternative to the above embodiment, the injection assembly comprises a second plunger 200c and a second piston 200b, the second piston 200b is disposed in the second cylinder, the second plunger 200c is connected with the second piston 200b, and the second piston 200b is configured to move along the axial direction of the second cylinder; wherein at least a portion of the second push rod 200c is disposed in the second cavity S2 through the second opening.
Specifically, the injection assembly includes a second ram 200c and a second piston 200 b; when the first push rod 100d pulls the first piston 100b to the position shown in fig. 1, the biasing assembly 100c is in a compressed state, and the syringe body is filled with fluid and is kept in the syringe body under the balance action of the biasing assembly 100c and the tissues in the patient; when the needle is inserted into the designated position, the pressure of the tissue in the patient body is reduced, the pressure of the elastic component 100c is released, the elastic component 100c pushes the first push piston to drive the second push rod 200c to move, and further drives the second piston 200b to move in the second cylinder body, so as to push the liquid to be injected into the patient body, and the movement of the first piston 100b and the first push rod 100d can be observed through naked eyes to give a clear visual signal.
As an alternative to the above embodiment, the second push rod 200c is detachably connected to the first piston 100 b. In general, the second push rod 200c and the first piston 100b may be bonded or screwed. Compared with the prior art, the existing injection device with the discrimination function is a disposable medical device, and can be destroyed after being used, so that the cost is higher. In the technical scheme of the utility model, after the use is finished, the second push rod 200c and the first piston 100b are detached, only the syringe which is in contact with the patient needs to be abandoned, and the auxiliary equipment is not in contact with the patient and can be reserved (can be continuously used after being sterilized), so that the cost of the medical instrument is reduced.
As an alternative to the above embodiment, the second axial end cap 100e is detachably connected to the first barrel 100 a. In particular, the second axial end cap 100e may be screwed or snapped or riveted to the first barrel 100a, mainly to facilitate the connection of the syringe with the accessory: after the second push rod 200c is inserted into the second opening, the second push rod 200c is coupled to the first piston 100b, and then the second axial end cap 100e is coupled to the first barrel 100 a.
As an alternative to the above embodiment, the second cylinder includes a second cylinder 200a formed to extend axially, and the second piston 200b is axially movable along the second cylinder 200 a; the moving direction of the second piston 200b is set to be the same as the moving direction of the first piston 100 b; a portion of the second barrel 200a is connected to the wall of the second opening. In order to ensure the coaxiality of the syringe cylinder and the auxiliary device and to facilitate the viewing movement, the moving direction of the second piston 200b is arranged in the same direction as the moving direction of the first piston 100b, i.e., the axis of the second piston 200b is arranged in parallel with the axis of the first piston 100b or is a coaxial device; further, a portion of the second barrel 200a of the second barrel is connected to the wall of the second opening, and in general, the second barrel 200a and the second opening of the second barrel are both configured to have a circular cross section.
As an optional implementation manner of the above embodiment, a stop block 200d is convexly disposed on an outer wall of the second barrel 200a, and the stop block 200d is connected to the second axial end cover 100 e. Specifically, the limiting block 200d is located on the radial outer wall of the second cylinder 200a and located at or near the end of the second cylinder 200 a. The stopper 200d is connected with the second axial end cap 100e to connect the injection cylinder with the auxiliary device, so as to form an integral structure, specifically, to facilitate that the moving direction of the second piston 200b is the same as the moving direction of the first piston 100 b. Generally, a threaded hole may be formed in the stopper 200d, and a hole may be formed in the second axial end cap 100e, so as to connect the stopper 200d and the second axial end cap 100e through a threaded connection. Or in general, the stop block 200d and the second axial end cap 100e may be connected in a plugging manner. In addition, the limiting block 200d may be located inside the auxiliary device or outside the auxiliary device.
As an optional implementation manner of the above embodiment, the pressing component 100c is a spring, two ends of the spring are respectively connected to the first piston 100b and the first axial end cover 100f, and the spring is sleeved on the first push rod 100 d. When the first push rod 100d pulls the first piston 100b to the position shown in fig. 1, the spring is in a compressed state, and the syringe body is filled with liquid and is kept in the syringe body under the balance action of the spring and the tissues in the patient; when the needle is penetrated to a designated position, the pressure of the tissue in the patient body is reduced, the pressure of the spring is released, the spring pushes the first push piston to drive the second push rod 200c to move, and further drives the second piston 200b to move in the second cylinder body so as to push liquid to be injected into the patient body, and the movement of the first piston 100b and the first push rod 100d can be observed through naked eyes to give a clear visual signal. When the first piston 100b is in the position shown in fig. 2, the spring is in its original state. That is, in the technical scheme of the utility model, the spring is in an original length or a pressed state.
The utility model further provides a puncture kit, which comprises a puncture needle and an auxiliary injection device, the specific structure of the auxiliary injection device refers to the above embodiments, and the puncture kit adopts all technical solutions of all the above embodiments, so that at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and further description is omitted. Wherein, the second cylinder body is provided with a liquid outlet end, and the puncture needle is connected with the liquid outlet end.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An auxiliary injection device, characterized by: the method comprises the following steps:
the auxiliary equipment comprises a first cylinder, a first piston and a spring pressing assembly; the first piston is arranged in the first cylinder and is configured to move along the axial direction of the first cylinder; the first barrel has a first axial end cap and a second axial end cap disposed opposite the first axial end cap; two ends of the elastic pressing assembly are respectively connected with the first axial end cover and the first piston; and
a syringe comprising a second barrel and an injection assembly configured to be movable in an axial direction of the second barrel;
wherein the second axial end cap has a second opening, the second barrel is coupled to the first barrel, and at least a portion of the injection assembly is positioned within the first barrel through the second opening and coupled to the first piston.
2. The supplemental injection device of claim 1, wherein the first barrel comprises an axially extending first barrel and a first ram;
the first piston, a portion of the first barrel, and the first axial end cap define a first cavity;
the first push rod is connected with the first piston, and at least one part of the first push rod is positioned in the first cavity; the first axial end cover is provided with a first opening, and the other part of the first push rod extends out of the first cylinder body through the first opening;
the elastic pressing component is arranged in the first cavity.
3. The supplemental injection device of claim 2, wherein the first piston, another portion of the first barrel, and the second axial end cap define a second cavity;
at least a portion of the injection assembly is disposed within the second cavity through the second aperture.
4. The supplemental injection device of claim 3, wherein the injection assembly comprises a second ram and a second piston, the second piston being disposed within the second barrel, the second ram being connected to the second piston, and the second piston being configured to move in an axial direction of the second barrel;
at least one part of the second push rod is arranged in the second cavity through the second opening hole in a penetrating mode and is connected with the first piston.
5. The supplemental injection device of claim 4, wherein the second ram is removably coupled to the first piston.
6. An auxiliary injection device as claimed in any of claims 2 to 5, wherein the second axial end cap is removably connected to the first barrel.
7. The supplemental injection device according to claim 6, wherein the second barrel includes a second barrel formed to extend axially, the second piston being axially movable along the second barrel;
the moving direction of the second piston is arranged in the same direction as that of the first piston;
a portion of the second barrel is connected to the wall of the second opening.
8. The auxiliary injection device as in claim 7, wherein the outer wall of the second barrel is provided with a stopper in a protruding manner, and the stopper is connected with the second axial end cap.
9. The auxiliary injection device as claimed in any one of claims 1 to 5, wherein the biasing member is a spring, two ends of the spring are respectively connected to the first piston and the first axial end cap, and the spring is sleeved on the first push rod.
10. A puncture kit, comprising:
puncturing needle; and
the auxiliary injection device of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121812279.5U CN215840930U (en) | 2021-08-04 | 2021-08-04 | Auxiliary injection device and puncture kit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121812279.5U CN215840930U (en) | 2021-08-04 | 2021-08-04 | Auxiliary injection device and puncture kit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215840930U true CN215840930U (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121812279.5U Active CN215840930U (en) | 2021-08-04 | 2021-08-04 | Auxiliary injection device and puncture kit |
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| Country | Link |
|---|---|
| CN (1) | CN215840930U (en) |
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2021
- 2021-08-04 CN CN202121812279.5U patent/CN215840930U/en active Active
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