CN113413233A - Injection needle for heart liquid perfusion of small animals - Google Patents
Injection needle for heart liquid perfusion of small animals Download PDFInfo
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- CN113413233A CN113413233A CN202110674808.8A CN202110674808A CN113413233A CN 113413233 A CN113413233 A CN 113413233A CN 202110674808 A CN202110674808 A CN 202110674808A CN 113413233 A CN113413233 A CN 113413233A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61D—VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
- A61D7/00—Devices or methods for introducing solid, liquid, or gaseous remedies or other materials into or onto the bodies of animals
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Abstract
The invention relates to the technical field of animal experimental instruments, in particular to an injection needle for perfusion of heart liquid of small animals, the needle comprises a metal needle tube, the upper end of the metal needle tube is provided with a needle point structure, the lower end of the metal needle tube is communicated with a corresponding liquid supply tube, an operating sleeve is arranged on the metal needle tube in a penetrating way, the lower end of the operating sleeve is provided with an operating handle, the upper end of the operating sleeve is close to the needle point structure and is provided with a stopping part which expands along the radial direction of the metal needle tube, the stop cooperates with the heart surface stop to define the depth of the needle tip structure into the heart, the periphery of the operation sleeve pipe is distributed with at least two elastic clamping pieces which extend upwards, the upper parts of the elastic clamping pieces are located above the needle point structure and are of arc-shaped bending structures, and the arc-shaped bending structures of the elastic clamping pieces surround together to form an accommodating space for accommodating the heart and holding the heart in a holding manner. The invention has strong practicability and excellent depth-limiting backstopping effect, and improves the success rate of the pouring operation.
Description
Technical Field
The invention relates to the technical field of animal experimental instruments, in particular to an injection needle for perfusion of heart liquid of small animals.
Background
The development of modern medicine is not supported by a large amount of experimental data, and animal experiments are mostly used for pioneering exploration in the early stage of the development of medical technology, especially pharmacological and pathological research and analysis need to use animals as main experimental objects, and the experimental animals generally use the types of rats, mice, guinea pigs and the like which are close to the experimental change of human bodies.
In order to study the pharmacological and pathological reactions of newborn mice, different experimental purposes require different operations such as dissection, injection and the like on the newborn mice, wherein, in order to study the pathological changes of tissues and organs, the blood in the mice is generally required to be drained, namely, the circulating blood in the mice is drained by using the required fluid (such as physiological saline and tissue fixing fluid) which is perfused through the heart, and the tissue is fixed in the tissues. In a specific operation, the chest cavity of a newborn mouse needs to be opened, most of the heart of the mouse needs to be exposed, the auricle needs to be cut, and then the injection needle is used for injecting the medicament into the heart. The existing injection needle comprises a metal needle tube, a liquid supply tube communicated with the metal needle tube and an operation handle arranged on the metal needle tube, wherein the liquid outlet end of the metal needle tube is of a needle point structure, but the position of a heart and a needle tool is not easy to fix when the injection needle tool is operated to act on the heart, so that the pricking depth of the needle point structure is not ideal, the depth of the needle point structure entering a heart chamber is insufficient, and then perfusion liquid leaks outwards, or the needle is inserted too deeply to scratch a heart chamber membrane; meanwhile, after the needle tip structure enters the heart chamber, due to the counter impact of the injected liquid, the hand shake of an operator, the heart shake and the like, the needle tip structure can easily exit the heart chamber or move in the heart chamber to scratch the related tissue structure, finally, the perfusion effect is not ideal or even fails due to the reasons, the experimental result is influenced, and the manpower, the material resources and the time are wasted.
In view of the above problems, it is necessary to develop a new type of needle set suitable for cardiac fluid perfusion in small animals to improve experimental conditions.
Disclosure of Invention
The invention provides an injection needle for liquid perfusion of a heart of a small animal, which aims to solve the problem that the conventional injection needle is easy to fail when liquid injection is carried out on the heart of the small animal due to the fact that the penetration depth is not easy to control and the injection needle is easy to float after penetration.
The injection needle for the heart liquid perfusion of the small animals adopts the following technical scheme:
the injection needle tool for the heart liquid perfusion of the small animals comprises a metal needle tube, wherein the upper end of the metal needle tube is provided with a needle point structure, the lower end of the metal needle tube is communicated with a corresponding liquid supply tube, an operation sleeve is arranged on the metal needle tube in a penetrating mode, the lower end of the operation sleeve is provided with an operation handle, the upper end of the operation sleeve is close to the needle point structure and is provided with a stopping part which expands along the radial direction of the metal needle tube, the stopping part is matched with the surface of the heart in a stopping mode so as to limit the depth of the needle point structure entering the heart, at least two elastic clamping pieces which extend upwards are distributed on the peripheral side of the operation sleeve, the upper parts of the elastic clamping pieces are located above the needle point structure and are of arc-shaped bending structures, and the arc-shaped bending structures of the elastic clamping pieces jointly enclose an accommodating space which is used for accommodating the heart so as to clamp and fix the heart.
The lower end of each elastic clamping piece is fixedly connected with the periphery of the operation sleeve and is positioned in the middle of the operation sleeve in the vertical direction, a driving sleeve positioned between the stop part and the lower end of each elastic clamping jaw penetrates through the operation sleeve in a vertical sliding mode, an L-shaped pull rod used for driving the driving sleeve vertically is arranged at the lower end of the driving sleeve, the lower end of the pull rod is positioned above the operation handle in the vertical direction, and when the driving sleeve is pulled downwards, the driving sleeve pushes each elastic clamping piece to deform in the direction away from the metal needle tube, so that the accommodating space is expanded, and when the driving sleeve is pushed upwards, each elastic clamping piece restores to the original shape and embraces the heart under the elastic action of the elastic clamping piece.
The driving sleeve is a conical sleeve structure with a large upper part and a small lower part, the peripheral side surface of the conical sleeve structure forms a pushing surface which is in pushing contact with each elastic card, and the pull rod is arranged on the front side and the rear side of the driving sleeve.
The upper end of each elastic clamping piece faces one side of the accommodating space and is provided with an anti-skid protrusion.
The operating sleeve is made of plastic, and each elastic card is made of plastic with elasticity.
The stopping part is a circular truncated cone structure with a large upper part and a small lower part, and the upper end surface of the circular truncated cone structure forms a stopping surface which is used for being matched with the heart stop so as to limit the depth of the needle point structure entering the heart.
The operating handle is flaky and the surface of the operating handle is provided with an anti-skid groove.
The upper end of the needle point structure is provided with a plane structure extending along the horizontal direction, so that the sharpness of the needle point structure is reduced.
The lower extreme of metal needle tubing is equipped with the branch stream block, be equipped with the reposition of redundant personnel chamber in the branch stream block, the upper end of dividing the stream block is equipped with the intercommunication metal needle tubing's egress, lower extreme are equipped with two inflow entrances that communicate different feed tubes respectively, egress and each inflow entrance all with the branch stream chamber intercommunication all is equipped with on the feed tube that each inflow entrance is connected and ends the liquid clamp.
The metal needle tube and the outflow port, each liquid supply tube and the corresponding inflow port are detachably connected in an inserting mode.
The invention has the beneficial effects that: before the injection needle tool is used, an operator can preset the position relationship between the needle point structure and the stopping part according to the size of an actual experimental heart so as to limit the depth of the needle point structure entering the heart; when the needle point structure enters the heart, based on the spherical structure of the heart, each elastic card passively opens until the stop part contacts with the surface of the heart and limits the depth of the needle point structure entering the heart, each elastic card returns to the initial state, the heart is located in the accommodating space at the moment, each elastic card jointly embraces the heart, the heart and the needle point structure are relatively fixed, the needle point structure can be effectively prevented from exiting the heart when liquid is injected or shaken and shaken, and external force can be applied to force each elastic card to open after the injection is finished, so that the heart is separated from the accommodating space, the needle point structure can be pulled out, and the liquid injection work is completed; the method is simple and convenient to operate, can be reused after disinfection, has strong practicability and excellent depth limiting and backstopping effects, and can greatly improve the success rate of the cardiac fluid perfusion operation of the small animals and ensure the timeliness of the experiment.
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, and 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 these drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of the injection needle set for cardiac fluid infusion in small animals according to the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is an enlarged schematic view at B of FIG. 1;
FIG. 4 is an enlarged schematic view of a tip structure;
in the figure: 1. the needle tube comprises a metal needle tube, 11, a needle point structure, 12, a plane structure, 2, an operation sleeve, 21, an operation handle, 22, an anti-skidding groove, 23, a stopping part, 24, a stopping surface, 3, an elastic clamping piece, 31, an anti-skidding bulge, 4, a driving sleeve, 41, a pull rod, 5, a flow distribution block, 51, a flow distribution cavity, 52, an outflow port, 53, a first inflow port, 54, a second inflow port, 6, a first liquid supply tube, 61, a second liquid supply tube, 7, a first liquid stopping clamp, 71, a second liquid stopping clamp, 8 and a heart.
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.
The invention relates to an embodiment of an injection needle tool for injecting heart liquid of a small animal, as shown in fig. 1 to 4, the injection needle tool for injecting heart 8 liquid comprises a metal needle tube 1, the upper end of the metal needle tube 1 is provided with a needle point structure 11, the lower end of the metal needle tube 1 is communicated with a corresponding liquid supply tube, an operation sleeve 2 is arranged on the metal needle tube 1 in a penetrating way, the operation sleeve 2 is fastened on the metal needle tube 1, the lower end of the operation sleeve 2 is provided with an operation handle 21, the upper end of the operation sleeve 2 is close to the needle point structure 11 and is provided with a stopping part 23 which is expanded along the radial direction of the metal needle tube 1, the stopping part 23 is in stopping fit with the surface of the heart 8 so as to limit the depth of the needle point structure 11 entering the heart 8, at least two elastic clamping sheets 3 which extend upwards are distributed on the peripheral side of the operation sleeve 2, the upper parts of the elastic clamping sheets 3 are all positioned above the needle point structure 11 and are in arc bending structures, and the arc bending structures of the elastic clamping sheets 3 together enclose a containing heart 8 so as to fix the heart 8 A space.
In the present embodiment, two elastic clips 3 are provided and are respectively located on the left and right sides of the operation sleeve 2. In other embodiments, the elastic card 3 can be provided in plurality according to actual needs, and the width and elasticity of the elastic card 3 can be set according to actual experimental needs.
Furthermore, in order to control the opening and closing of each elastic clamping piece 3, the lower end of each elastic clamping piece 3 is fixedly connected with the periphery of the operating sleeve 2 and is positioned in the middle of the operating sleeve 2 in the vertical direction, the upper part of each elastic clamping piece 3 slightly opens outwards, a driving sleeve 4 positioned between the stopping part 23 and the lower end of each elastic claw is slidably penetrated and installed up and down on the operating sleeve 2, the driving sleeve 4 is positioned between the elastic clamping pieces 3 and the operating sleeve 2 in the radial direction of the metal needle tube 1, the lower end of the driving sleeve 4 is provided with an L-shaped pull rod 41 for driving the driving sleeve 4 up and down, the lower end of the pull rod 41 is positioned above the operating handle 21 in the up and down direction, when the driving sleeve 4 is pulled downwards, the driving sleeve 4 pushes each elastic clamping piece 3 to deform in the direction away from the metal needle tube 1, so that the accommodating space is expanded, and when the driving sleeve 4 is pushed upwards, each elastic clamping piece 3 restores to the original shape and embraces the heart 8 under the self elastic action.
Further, in order to make the contact area between the circumferential surface of the driving sleeve 4 and the elastic card 3 large enough and ensure the stability and effectiveness of pushing, the driving sleeve 4 is a tapered sleeve structure with a large top and a small bottom, the circumferential side surface of the tapered sleeve structure forms a pushing surface which is in pushing contact with each elastic card 3, and the pull rod 41 is arranged at the front side and the rear side of the driving sleeve 4.
Further, in order to enhance the effect that the elastic clamping pieces 3 embrace the heart 8, the needle point structures 11 are further prevented from being forced to exit, the upper end of each elastic clamping piece 3 faces towards one side of the accommodating space and is provided with the anti-slip protrusions 31, and in order to facilitate the heart 8 to enter the accommodating space, the upper end of each elastic clamping piece 3 is an inclined plane structure which is beneficial to the heart 8 to enter the accommodating space.
Further, considering process factors, weight factors, durability factors and sterilization factors, the operating sleeve 2 is made of plastic, and each elastic clamping piece 3 is made of an elastic plastic sheet, wherein the plastic should meet medical or experimental requirements.
Further, the stopper 23 is a circular truncated cone structure with a large top and a small bottom, and the upper end surface of the circular truncated cone structure forms a stopper surface 24 for stopper cooperation with the heart 8 so as to limit the depth of the needle tip structure 11 entering the heart 8. The stopper 23 may have an annular flat plate structure or another structure capable of achieving a stopper effect.
Further, in order to facilitate the holding, the operating handle 21 is sheet-shaped and has an anti-slip groove 22 on the surface.
Further, in order to avoid that the needle tip structure 11 is too sharp and cuts the septum between the chambers in the heart 8, the upper end of the needle tip structure 11 is provided with the planar structure 12 extending along the horizontal direction, i.e. the radial plane of the metal needle tube 1, so as to reduce the sharpness of the needle tip structure 11, the planar structure 12 can be ground, the length and the width of the planar structure 12 can be preset according to specific needs, so as to have bluntness under the condition that the needle tip structure can be smoothly punctured into the heart 8, the edges of the needle tip structure 11 at the two sides of the planar structure 12 can be used for cutting the heart 8 tissue during puncturing, preferably, as shown in fig. 4, the width of the planar structure 12 in this embodiment is equal to the wall thickness of the metal needle tube 1, and the straight line distance between the left end and the right end of the planar structure 12 on the radial plane of the metal needle tube 1 is smaller than the inner diameter of the metal needle tube 1.
Furthermore, in order to conveniently replace the type of the injection liquid without pulling out the needle tip structure 11 and further reduce the operation time, the lower end of the metal needle tube 1 is provided with the shunting block 5, the shunting block 5 is internally provided with a shunting cavity 51, the upper end of the shunting block 5 is provided with an outflow port 52 communicated with the metal needle tube 1, the lower end of the shunting block 5 is provided with two inflow ports respectively communicated with different liquid supply tubes, the outflow port 52 and each inflow port are both communicated with the shunting cavity 51, and the liquid supply tubes connected with each inflow port are both provided with a liquid stopping clip.
Furthermore, in order to facilitate assembly and disassembly, and facilitate cleaning and disinfection, the metal needle tube 1 and the outflow port 52, and each liquid supply tube and the corresponding inflow port are detachably connected in a plug-in manner.
The sizes, the spacing sizes and the like of all structures and components can be adjusted adaptively.
The shunting block 5 can be made of transparent plastic, so that the flowing condition of the liquid can be observed conveniently.
When the device is used, a proper injection needle is selected in advance according to the size of a target heart 8 to obtain a proper limited depth and a proper length and shape of the elastic cards 3, then an experimental target is fixed, most of the target heart 8 is exposed, an operator pinches the operating handle 21 with the middle finger, the drive sleeve 4 slides downwards by pulling the pull rod 41 downwards with the index finger, the upper ends of the elastic cards 3 are mutually opened, the accommodating space is expanded, the operating handle 21 is controlled to move the metal needle tube 1 to the target chamber of the heart 8 until the needle tip structure 11 is immersed into the chamber of the heart 8 and the stopping part 23 is in stopping contact with the surface of the heart 8, at the moment, the pulling action of the index finger on the pull rod 41 can be released, the pull rod 41 is reversely pushed to slide the drive sleeve 4 upwards, and the elastic cards 3 recover to the original shape under the action of self elasticity, so as to achieve the purpose of holding the heart 8, at this time, under the effect of the cohesion effect, the relative position of the heart 8 and the needle point structure 11 does not change, that is, the needle point structure 11 is prevented from retreating from the heart 8 due to external influence, the backstop effect is achieved, and the situation that the needle point structure 11 floats in the chamber of the heart 8 and the floating amplitude is too large is avoided; when liquid needs to be replaced in liquid injection, if the second liquid stop clip 71 blocks the second liquid supply tube 61 and the first liquid supply tube 6 is not blocked by the first liquid stop clip 7, the first liquid supply tube 6 supplies the first liquid, and when switching, the first liquid stop clip 7 blocks the first liquid supply tube 6, the blocking of the second liquid stop clip 71 on the second liquid supply tube 61 is removed, and at this time, the second liquid supply tube 61 can supply the second liquid; after all the liquid is injected, the thumb and the middle finger still hold the operating handle 21, the index finger pulls the pull rod 41 downwards to make the driving sleeve 4 slide downwards, so that the upper ends of the elastic cards 3 are mutually opened, the accommodating space is expanded, and the needle tip structure 11 is pulled out.
The invention can limit the depth of the needle point structure 11 entering the heart 8 by setting the distance between the needle point structure 11 and the stopping part 23, and can control each elastic card 3 to embrace the heart 8, so that the heart 8 and the needle point structure 11 are relatively fixed, and the phenomena that the needle point structure 11 exits the heart 8 and the needle point structure 11 floats in the heart 8 in an overlarge amplitude can be effectively prevented when liquid is injected or shakes and shakes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A syringe needle utensil for small-size animal heart liquid perfusion, including metal needle tubing, metal needle tubing's upper end is equipped with needle point structure, lower extreme and corresponding feed tube intercommunication, its characterized in that: the heart surgery instrument comprises a metal needle tube, and is characterized in that an operating sleeve is arranged on the metal needle tube in a penetrating mode, an operating handle is arranged at the lower end of the operating sleeve, the upper end of the operating sleeve is close to a needle point structure, a blocking portion which expands along the radial direction of the metal needle tube is arranged at the upper end of the operating sleeve, the blocking portion is in blocking fit with the surface of a heart, so that the depth of the needle point structure entering the heart is limited, at least two elastic clamping pieces which extend upwards are distributed on the peripheral side of the operating sleeve, the upper portion of each elastic clamping piece is located above the needle point structure and is of an arc-shaped bending structure, and the arc-shaped bending structures of the elastic clamping pieces jointly enclose an accommodating space which is used for accommodating the heart and fixing the heart in a holding mode.
2. The injection needle set for small animal cardiac fluid infusion of claim 1, wherein: the lower end of each elastic clamping piece is fixedly connected with the periphery of the operation sleeve and is positioned in the middle of the operation sleeve in the vertical direction, a driving sleeve positioned between the stop part and the lower end of each elastic clamping jaw penetrates through the operation sleeve in a vertical sliding mode, an L-shaped pull rod used for driving the driving sleeve vertically is arranged at the lower end of the driving sleeve, the lower end of the pull rod is positioned above the operation handle in the vertical direction, and when the driving sleeve is pulled downwards, the driving sleeve pushes each elastic clamping piece to deform in the direction away from the metal needle tube, so that the accommodating space is expanded, and when the driving sleeve is pushed upwards, each elastic clamping piece restores to the original shape and embraces the heart under the elastic action of the elastic clamping piece.
3. The injection needle set for small animal cardiac fluid infusion of claim 2, wherein: the driving sleeve is a conical sleeve structure with a large upper part and a small lower part, the peripheral side surface of the conical sleeve structure forms a pushing surface which is in pushing contact with each elastic card, and the pull rod is arranged on the front side and the rear side of the driving sleeve.
4. The injection needle set for small animal cardiac fluid infusion of claim 3, wherein: the upper end of each elastic clamping piece faces one side of the accommodating space and is provided with an anti-skid protrusion.
5. The injection needle set for small animal cardiac fluid infusion of claim 4, wherein: the operating sleeve is made of plastic, and each elastic card is made of plastic with elasticity.
6. The injection needle set for cardiac fluid infusion of small animals according to any one of claims 1 to 5, wherein: the stopping part is a circular truncated cone structure with a large upper part and a small lower part, and the upper end surface of the circular truncated cone structure forms a stopping surface which is used for being matched with the heart stop so as to limit the depth of the needle point structure entering the heart.
7. The injection needle set for small animal cardiac fluid infusion of claim 6, wherein: the operating handle is flaky and the surface of the operating handle is provided with an anti-skid groove.
8. The injection needle set for small animal cardiac fluid infusion of claim 1, wherein: the upper end of the needle point structure is provided with a plane structure extending along the horizontal direction, so that the sharpness of the needle point structure is reduced.
9. The injection needle set for small animal cardiac fluid infusion of claim 1, wherein: the lower extreme of metal needle tubing is equipped with the branch stream block, be equipped with the reposition of redundant personnel chamber in the branch stream block, the upper end of dividing the stream block is equipped with the intercommunication metal needle tubing's egress, lower extreme are equipped with two inflow entrances that communicate different feed tubes respectively, egress and each inflow entrance all with the branch stream chamber intercommunication all is equipped with on the feed tube that each inflow entrance is connected and ends the liquid clamp.
10. The injection needle set for small animal cardiac fluid infusion of claim 9, wherein: the metal needle tube and the outflow port, each liquid supply tube and the corresponding inflow port are detachably connected in an inserting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110674808.8A CN113413233A (en) | 2021-06-18 | 2021-06-18 | Injection needle for heart liquid perfusion of small animals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110674808.8A CN113413233A (en) | 2021-06-18 | 2021-06-18 | Injection needle for heart liquid perfusion of small animals |
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| Publication Number | Publication Date |
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| CN113413233A true CN113413233A (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110674808.8A Pending CN113413233A (en) | 2021-06-18 | 2021-06-18 | Injection needle for heart liquid perfusion of small animals |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203425059U (en) * | 2013-07-17 | 2014-02-12 | 上海市同济医院 | Rat heart perfusion fixation device |
| CN205913421U (en) * | 2016-06-01 | 2017-02-01 | 中国人民解放军第二军医大学 | Blood suit is got to heart |
| CN206007400U (en) * | 2016-07-07 | 2017-03-15 | 齐齐哈尔医学院 | Experiment mice heart irrigator |
| CN207506663U (en) * | 2017-04-21 | 2018-06-19 | 湖南农业大学 | Hypodermic needle for animals |
| CN111658023A (en) * | 2020-07-08 | 2020-09-15 | 郑州大学第一附属医院 | Peripheral telescopic forceps flap type multifunctional cavity biopsy forceps device |
| CN215688736U (en) * | 2021-06-18 | 2022-02-01 | 河南中医药大学第一附属医院 | Injection needle for heart liquid perfusion of small animals |
-
2021
- 2021-06-18 CN CN202110674808.8A patent/CN113413233A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203425059U (en) * | 2013-07-17 | 2014-02-12 | 上海市同济医院 | Rat heart perfusion fixation device |
| CN205913421U (en) * | 2016-06-01 | 2017-02-01 | 中国人民解放军第二军医大学 | Blood suit is got to heart |
| CN206007400U (en) * | 2016-07-07 | 2017-03-15 | 齐齐哈尔医学院 | Experiment mice heart irrigator |
| CN207506663U (en) * | 2017-04-21 | 2018-06-19 | 湖南农业大学 | Hypodermic needle for animals |
| CN111658023A (en) * | 2020-07-08 | 2020-09-15 | 郑州大学第一附属医院 | Peripheral telescopic forceps flap type multifunctional cavity biopsy forceps device |
| CN215688736U (en) * | 2021-06-18 | 2022-02-01 | 河南中医药大学第一附属医院 | Injection needle for heart liquid perfusion of small animals |
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