CN215384878U

CN215384878U - Injection device for small animal blood vessel

Info

Publication number: CN215384878U
Application number: CN202121578880.2U
Authority: CN
Inventors: 杨勇; 吕广钊; 薛渊; 周立婷; 周东; 毛瑞; 周钰君
Original assignee: Guangdong General Hospital
Current assignee: Guangdong General Hospital
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2022-01-04
Anticipated expiration: 2031-07-12

Abstract

The utility model relates to the technical field of injection, and discloses an injection device for a small animal blood vessel, which comprises an injector, wherein a catheter is connected to the injector, and a first needle head is arranged at the tail end of the catheter; the injection pump comprises a controller and a pushing device for driving the injector, the pushing device is electrically connected with the controller, and the injector is fixed on the pushing device; and the fixing frame is used for fixing the injection device. In operation, the controller controls the injection device to move the piston handle, and liquid in the injector is transmitted to the first needle through the guide pipe. The first needle head and the injector are connected by the catheter, and the injector is fixed by the fixing seat, so that an operator does not need to directly hold the injector in the puncturing process, the puncturing angle is flexible and controllable, and the puncturing quality is improved; and the injection pump is adopted for automatic injection, so that the injection speed and the liquid dosage are more accurate, and the stability and the repeatability of the injection result are ensured.

Description

Injection device for small animal blood vessel

Technical Field

The utility model relates to the technical field of injection, in particular to an injection device for a small animal blood vessel.

Background

At present, blood vessels of small animals, particularly mice, are very small, the diameter of the blood vessels is only less than 1mm, the difficulty of blood vessel puncture and injection is very high, and the success rate is very low. At present, the rigidity of needle heads of common 1mL syringes and insulin injection needles is high, the syringes need to be held by hands during puncture, the puncture angle is not easy to adjust, the stability of the syringes is difficult to keep during puncture, and puncture injection failure caused by injury of blood vessel walls is easy to penetrate; and because manual injection is adopted, the injection speed and the injection amount of the injector are difficult to accurately control, and the stability and the repeatability of the injection result are seriously influenced.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: the injection device for the small animal blood vessel is provided, the needle head of the injection device is connected with an injector through a conduit, and an injection pump is adopted for injection, so that the puncture quality and the injection stability are ensured, and the injection device is suitable for puncture and injection of the small animal blood vessel.

In order to achieve the aim, the utility model provides an injection device for a small animal blood vessel, which comprises an injector, a catheter and a first needle, wherein the injector is connected with the catheter; the injection pump comprises a controller and a pushing device for driving the injector, the pushing device is electrically connected with the controller, and the injector is fixed on the pushing device; and the fixing frame is used for fixing the injection device.

Compared with the prior art, the injection device for the small animal blood vessel provided by the embodiment of the utility model has the beneficial effects that: the injector is fixed in the fixed seat, and the two sides of the injector are respectively connected with the catheter and the injection device. When the injection device works, the first needle at the tail end of the catheter is punctured into a blood vessel of a small animal, the controller controls the injection device to inject, and liquid in the injector is transmitted to the first needle through the catheter. The catheter is used for connecting the first needle head with the injector, and the injector is fixed and injected through the injection device, so that an operator does not need to directly hold the injector in the puncture process, the puncture angle is flexible and controllable, the first needle head is prevented from penetrating through a blood vessel, the first needle head is ensured to be completely positioned in the blood vessel cavity to complete injection, and the puncture quality is improved; and the injection pump is adopted to control injection, so that the injection speed and the injection dosage are more accurate, the stability and the repeatability of an injection result are ensured, and the injection pump is suitable for the injection of small animal small blood vessels.

The injection device for the small animal blood vessel comprises a fixed seat, a movable seat and a driving device for driving the movable seat, wherein a groove for fixing the injector is formed in the fixed seat, the movable seat is arranged on one side of the fixed seat, and a piston handle of the injector is fixed in the movable seat.

The injection device for the small animal blood vessel comprises a sliding rail, and the moving seat is connected to the sliding rail in a sliding manner.

According to the injection device for the small animal blood vessel, the fixing seat is obliquely fixed on the fixing frame downwards along the injection direction, the fixing seat further comprises a fixing block, and the fixing block abuts against the flange of the injector.

According to the injection device for the small animal blood vessel, the fixed seat comprises a limiting piece for fixing the injector, and the limiting piece is rotatably connected to the fixed seat.

According to the injection device for the small animal blood vessel, the catheter and the tail end of the injector are matched, so that the catheter can be detachably connected to the injector.

According to the injection device for the small animal blood vessel, provided by the embodiment of the utility model, the end, close to the guide pipe, of the injector is provided with the internal thread, and the end, close to the injector, of the guide pipe is provided with the threaded connector matched with the internal thread.

According to the injection device for the small animal blood vessel, the catheter is made of flexible materials.

According to the injection device for the small animal blood vessel, the length of the catheter is 200mm, the outer diameter of the catheter is 0.61mm, and the inner diameter of the catheter is 0.28 mm.

According to the injection device for the small animal blood vessel, the first needle comprises a 31G needle, and the length of the first needle is 6 mm.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic side view of a small animal vascular injection device according to one embodiment of the present invention;

FIG. 2 is a schematic front view of a small animal blood vessel injection device according to an embodiment of the present invention;

FIG. 3 is a schematic side view of a small animal blood vessel injection device according to another embodiment of the present invention;

FIG. 4 is a schematic front view of a small animal blood vessel injection device according to another embodiment of the present invention;

in the figure, 1, syringe; 11. a piston handle; 12. a second needle; 2. a conduit; 21. a first retaining ring; 22. a second retaining ring; 3. a first needle; 4. a fixed mount; 41. a base plate; 411. A through hole; 42. a pillar; 43. a fixed seat; 431. a fixed block; 432; a limiting member; 52. a bolus injection device; 521. a movable seat; 522. a slide rail.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1, 2, 3 and 4, the injection device for small animal blood vessels according to the preferred embodiment of the present invention comprises an injector 1, a piston is arranged in the injector 1, the piston is connected with a piston handle 11 extending out of the injector 1, a catheter 2 is connected to one side of the injector 1 far away from the piston handle 11, and a first needle 3 is arranged at the end of the catheter 2; adopt pipe 2 to connect first needle 3 and syringe 1, this setting makes operating personnel need not direct handheld syringe 1 at the puncture in-process, and the puncture angle is nimble controllable, avoids piercing through the vascular wall. Specifically, the catheter 2 is made of polyethylene, and has moderate hardness, so that the position of the catheter 2 can be conveniently adjusted in the puncturing and injection processes. Specifically, the first needle 3 is a 31G needle, the length is 6mm, and both the length and the diameter are suitable for performing vascular puncture with smaller diameter; the catheter 2 is made of flexible materials, and the length of the catheter 2 is 200mm, the outer diameter is 0.61mm, and the inner diameter is 0.28 mm.

As shown in fig. 1, the injection device for small animal blood vessels according to the preferred embodiment of the present invention further includes an injection pump, the injection pump includes a controller and a bolus injection device 52, the bolus injection device 52 is electrically connected to the controller, the injector 1 is fixed on the bolus injection device 52, and the bolus injection device 52 is connected to the piston handle 11 of the injector 1 to drive the injector 1 to inject liquid. Before the injector device 52 is used, data of the type, injection speed, injection dosage and the like of the micro-injector 1 are input into the controller, and the controller adjusts the operating parameters of the injector device 52, including the moving speed and the moving stroke, according to the input data. The injection pump is adopted for injection, so that the injection speed and the injection dosage are more accurate, and the stability and the repeatability of the injection result are ensured.

In some embodiments of the present invention, the injection device 52 includes a fixed seat 43, a movable seat 521 and a driving device for driving the movable seat 521, a groove is formed in the fixed seat 43, and the size of the groove is matched with the outer diameter of the injector 1, so that the injector 1 can be clamped in the fixed seat 43 through the groove, an operator does not need to directly hold the injector 1 during a puncturing process, unstable puncturing is prevented when the injector 1 is held by hand, and puncturing quality is improved; the injector 1 is fixed by a fixing seat 43, and further, a fixing block 431 is further arranged on the fixing seat 43 and used for fixing the injector 1; the movable seat 521 is disposed at one side of the fixed seat 43 and close to the piston stem 11, a groove is disposed in the movable seat 521, the size of the groove matches with the size of the end of the piston stem 11, and the piston stem 11 is fixed in the detent of the movable seat 521. After the signal of the controller is sent to the driving device, the driving device drives the movable base 521, and the movable base 521 drives the piston handle 11 fixed in the movable base 521 to move along the length direction of the injector 1, so as to perform injection. The injector 1 does not need to be manually controlled, so that the injection result is stable and reliable. In some embodiments of the utility model, the driving means comprises a motor or a cylinder or the like.

As shown in fig. 1, the injection device for small animal blood vessels according to the preferred embodiment of the present invention further includes a fixing frame 4, the fixing frame 4 includes a bottom plate 41 and a supporting pillar 42, the supporting pillar 42 is used for supporting the bottom plate 41, and a fixing seat 43 is fixed on the bottom plate 41. Specifically, the bottom plate 41 is provided with screw holes, and the pushing device 52 is fixed on the bottom plate 41 by screws. Furthermore, the universal wheels are arranged at the bottom of the supporting column 42, so that the movable fixing frame 4 can be conveniently moved to meet different occasions.

In some embodiments of the present invention, the fixing base 43 is detachably fixed on the bottom plate 41, so that it is convenient to replace the fixing base 43 with different sizes to adapt to different types of syringes 1, and the injection device has a wider application range and is more flexible to use. Specifically, the fixing manner of the fixing seat 43 and the bottom plate 41 may be bolt fixing, and the like, and is not limited specifically herein.

In some embodiments of the present invention, the fixing frame 4 is disposed obliquely, the fixing seat 43 is fixed on the bottom plate 41 obliquely downwards along the injection direction, the injector 1 is also disposed obliquely in the fixing seat 43, and the side connected with the conduit 2 faces downwards, so that the liquid in the injector 1 flows towards the side of the injector 1 close to the conduit 2 along with gravity. In order to overcome the downward movement of the syringe 1, a fixing block 431 is provided in the fixing base 43, the fixing block 431 is disposed below the flange of the syringe 1, and the fixing block 431 abuts against the flange of the syringe 1 to prevent the syringe 1 from sliding downward under the influence of gravity. Specifically, two fixing blocks 431 are provided, the two fixing blocks 431 are located at the same height of the bottom plate 41 and are arranged at two sides of the syringe 1, and the distance between the two fixing blocks 431 is greater than the outer diameter of the syringe 1 and smaller than the outer diameter of the flange, so that two sides of the flange abut against the two fixing blocks 431.

In some embodiments of the present invention, the fixing base 43 includes a limiting element 432 matching with an outer diameter of the syringe 1, and the limiting element 432 is disposed above the syringe 1 to prevent the syringe 1 from moving during operation, so as to fix the syringe 1. Further, the limiting member 432 is rotatably connected to the fixing base 43, so as to facilitate opening and closing of the limiting member 432 and replacement of the syringe 1. Specifically, the limiting member 432 is fixed to the fixing base 43 by a hinge. It is understood that the limiting member 432 may be provided in one or more, and is not limited herein. The height of the limiting member 432 is adjustable, and the syringe 1 with different sizes can be adapted.

In some embodiments of the present invention, the injector device 52 includes a sliding rail 522, and the movable base 521 is slidably connected to the sliding rail 522. The slide rail 522 is disposed at the bottom of the bottom plate 41 and extends along the length direction of the injector 1, and the movable base 521 moves along the slide rail 522 and drives the piston handle 11 to move for injection. Further, a through hole 411 is formed in the bottom plate 41, and the through hole 411 is disposed above the slide rail 522 and is in a bar shape, and extends along the length direction of the slide rail 522. During the injection process, the movable seat 521 moves in the through hole 411 along the length direction of the through hole 411.

In some embodiments of the utility model, one end of the first needle 3 is sized to mate with the catheter 2 such that the first needle 3 is removably connected to the catheter 2. Specifically, the inner diameter of the catheter 2 is matched with the outer diameter of the first needle 3, and the catheter 2 is directly sleeved outside the first needle 3. Adopt the fixed mode of detachably, be convenient for change the syringe needle, improved the flexibility of device.

In some embodiments of the present invention, a first fixing ring 21 is further sleeved outside a joint of the catheter 2 and the first needle 3 to fix the catheter 2 and the first needle 3, so as to improve the sealing property of the joint, prevent leakage, and ensure the stability of an injection result.

In other embodiments of the present invention, the catheter 2 and the first needle 3 are integrally disposed, the catheter 2 is detachably connected to the injector 1, and the first needle 3 can be replaced at the same time when the catheter 2 is replaced, so as to be suitable for various different scenes.

In some embodiments of the utility model, as shown in fig. 1 and 2, the end of the syringe 1 adjacent to the catheter 2 is provided with an internal thread, the end of the catheter 2 adjacent to the syringe 1 is provided with a nipple 23 which is engaged with the internal thread, and the catheter 2 is connected to the syringe 1 through the nipple 23. The catheter 2 and the injector 1 are more firmly fixed through threaded connection, the disassembly is convenient, the catheter 2 and the first needle 3 with different sizes are convenient to replace, and the flexibility of the device is improved. The inner side of the spiral joint 23 is provided with a sealing ring which is sleeved at the joint of the catheter 2 and the injector 1 so as to improve the sealing capability of the device and prevent the leakage of the injection liquid and the pollution.

In other embodiments of the utility model, as shown in figures 3 and 4, the syringe 1 comprises a second needle 12, the second needle 12 being disposed at the end of the syringe 1 remote from the plunger shaft 11, the fluid in the syringe 1 being expelled from the syringe 1 through the second needle 12 and then into the catheter 2 for infusion, the catheter 2 having one end connected to the end of the second needle 12. Specifically, the injector 1 adopts a micro injector, the end of the micro injector is provided with a second needle 12, and the catheter 2 is directly sleeved on the second needle 12 of the micro injector, so that the installation is rapid, the use is convenient, and the cleaning and the replacement of the catheter 2 are convenient.

In some embodiments of the utility model, the inner diameter of the catheter 2 is matched to the outer diameter of the second needle 12 so that the catheter 2 is detachably sleeved on the second needle 12. Specifically, the inner diameter of the catheter 2 is matched with the outer diameter of the second needle 12, and the catheter 2 is directly sleeved outside the second needle 12.

In some embodiments of the present invention, a second fixing ring 22 is further sleeved outside the joint of the catheter 2 and the second needle 12 to fix the catheter 2 and the second needle 12, and the sealing performance of the joint is improved, leakage is prevented, and the stability of the injection result is ensured.

The working process of the utility model is as follows: before working, firstly inputting the type, the required injection speed and the required injection dosage of the injector 1 into a controller, then extending a first needle 3 into liquid to be injected, starting a pushing injection device 52 to drive a piston pump to move, sucking the liquid through the first needle 3, and filling the liquid into the injector 1; after the suction is finished, the first needle 3 is punctured into the blood vessel of the small animal, so that the first needle 3 is punctured into the blood vessel of the small animal and does not penetrate through the blood vessel wall; then, the controller activates the injector 52, and the injector 52 drives the movable seat 521 to apply pressure to the piston pump, so that the injector 1 starts injecting, and the liquid enters the blood vessel of the small animal from the injector 1 through the conduit 2 and the first needle 3. After the injection is completed, the first needle 3 is pulled out and the injection device 52 is closed.

To sum up, the embodiment of the utility model provides an injection device for a small animal blood vessel, which adopts a conduit 2 to connect a first needle 3 and an injector 1, the injector 1 is fixed by a fixing seat 43, so that an operator does not need to directly hold the injector 1 in a puncture process, the puncture angle is flexible and controllable, the first needle 3 is prevented from puncturing the blood vessel to cause blood vessel damage, the first needle 3 is ensured to be completely positioned in a blood vessel cavity to complete injection, the stability is good, the leakage occurrence rate is low, the unstable puncture condition is prevented when the injector 1 is held by hands, and the puncture quality is improved; and the injection speed and the liquid dosage are more accurate by adopting the injection pump for injection, and the stability and the repeatability of the injection result are ensured.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An injection device for a small animal blood vessel, comprising:

the syringe is connected with a catheter, and the tail end of the catheter is provided with a first needle head;

the injection pump comprises a controller and a pushing device for driving the injector, the pushing device is electrically connected with the controller, and the injector is fixed on the pushing device; and

the fixing frame is used for fixing the injection device.

2. The small animal vascular injection device of claim 1, wherein: the injection device comprises a fixed seat, a movable seat and a driving device for driving the movable seat, wherein a groove for fixing the injector is formed in the fixed seat, the movable seat is arranged on one side of the fixed seat, and a piston handle of the injector is fixed in the movable seat.

3. The small-animal vascular injection device of claim 2, wherein: the injection device further comprises a sliding rail, and the moving seat is connected to the sliding rail in a sliding mode.

4. The small-animal vascular injection device of claim 2, wherein: the fixing seat is obliquely fixed on the fixing frame in a downward direction along the injection direction, and the fixing seat further comprises a fixing block which is abutted to the flange of the injector.

5. The small animal vascular injection device of claim 2 or 4, wherein: the fixing seat comprises a limiting part for fixing the injector, and the limiting part is rotatably connected to the fixing seat.

6. The small animal vascular injection device of claim 1, wherein: the catheter and the end of the syringe cooperate to removably attach the catheter to the syringe.

7. The small animal vascular injection device of claim 6, wherein: an internal thread is arranged at one end of the injector close to the guide pipe, and a threaded joint matched with the internal thread is arranged at one end of the guide pipe close to the injector.

8. The small animal vascular injection device of claim 1, wherein: the conduit is made of flexible materials.

9. The small animal vascular injection device of claim 1 or 8, wherein: the catheter has a length of 200mm, an outer diameter of 0.61mm and an inner diameter of 0.28 mm.

10. The small animal vascular injection device of claim 1, wherein: the first needle comprises a 31G needle, and the length of the first needle is 6 mm.