CN111588947A - Injection device for stopping bleeding of cervical vertebral canal venous plexus - Google Patents

Abstract

The invention relates to an injection device for hemostasis of cervical vertebral canal venous plexus, belonging to the technical field of medical tools. The injection device comprises an inner tube filled with fluid gelatin and an outer tube filled with gelatin sponge, and the inner tube is fixed in the outer tube, A first piston is installed in the inner tube, a second piston is installed in the cavity between the outer tube and the inner tube; the outer casing and the first and second flattening devices are installed in the outer casing, and the outer casing is connected to the outer tube. At the left end, the power output end of the first flat pushing device extends into the inner tube and is connected with the first piston, and the power output end of the second flat pushing device extends into the cavity between the outer tube and the inner tube and is connected with the second piston. connected. Through the above structure, the injection device for hemostasis of cervical vertebral canal venous plexus provided by the present invention can push out fluid gelatin and gelatin sponge in sequence to quickly and effectively stop bleeding in common typical parts of cervical vertebral canal venous plexus, and can also control the outflow of the venous plexus. The amount of fluid gelatin reduces waste and is more practical.

Description

An injection device for hemostasis of cervical vertebral canal venous plexus

technical field

The invention belongs to the technical field of medical tools, and in particular relates to an injection device for hemostasis of cervical vertebral canal venous plexus.

Background technique

In anterior cervical discectomy and fusion (ACDF), conical venous plexus hemorrhage is a difficult intraoperative complication due to its large amount of bleeding and the difficulty of direct compression to stop bleeding. Due to the narrow surgical field and high requirements for decompression, how to safely and quickly control epidural venous plexus bleeding during decompression is still a problem faced by spine surgeons.

At present, some physicians use fluid gelatin for hemostasis. However, due to the rapid and large amount of bleeding in the cervical spinal venous plexus, it is difficult for the coagulation cascade to proceed smoothly without physical compression and adsorption. The difficulty is still relatively large, and the amount of fluid gelatin is not easy to control, which is easy to cause waste; some physicians also use gelatin sponge to stop bleeding. With the help of the high swelling property of gelatin sponge, it can play a certain hemostatic effect, but gelatin sponge cannot directly Inadequate hemostasis due to contact with the conical venous plexus, which is blocked by bony structures.

SUMMARY OF THE INVENTION

The invention provides an injection device for hemostasis of cervical vertebral canal venous plexus, which is used to solve the technical problems that the cervical vertebral canal venous plexus is difficult to stop bleeding and the amount of fluid gelatin is difficult to control during hemostasis.

The present invention is achieved through the following technical solutions: an injection device for hemostasis of cervical vertebral canal venous plexus, comprising:

The inner tube containing fluid gelatin and the outer tube containing gelatin sponge, the inner tube is fixed in the outer tube and the right end of the inner tube is flush with the right end of the outer tube, and the inner tube is equipped with the first tube. a piston, a second piston is installed in the cavity between the outer tube and the inner tube;

The casing and the first and second smoothing devices installed in the casing, the casing is connected with the outer pipe, and the power output end of the first smoothing device extends into the inner pipe and Connected with the first piston for pushing the fluid gelatin out of the right end of the inner tube, the power output end of the second pusher extends into the space between the outer tube and the inner tube. cavity and connected to the second piston for pushing the gelatin sponge out of the right end of the outer tube.

Further, in order to better realize the present invention, the first flat pushing device includes a first motor, a first lead screw, a first nut and a first push rod, and the first motor is installed in the housing, so The first lead screw is connected to the rotating shaft of the first motor through a first coupling, the first nut is screwed on the first lead screw, and the first push rod is connected to the first The outer wall of the nut and the inner wall of the casing are provided with a first support plate that supports the first lead screw, and the right end of the first push rod extends into the inner tube and is connected to the first piston .

Further, in order to better realize the present invention, the second flat pushing device includes a second motor, a second lead screw, a second nut and a second push rod, and the second motor is installed in the housing, so The second lead screw is connected to the rotating shaft of the second motor through a second coupling, the second nut is screwed on the second lead screw, and the second push rod is connected to the second The outer wall of the nut and the inner wall of the casing are also provided with a second support plate that supports the second lead screw, and the right end of the second push rod extends into the cavity between the outer tube and the inner tube middle.

Further, in order to better realize the present invention, it also includes a handle installed at the left end of the casing, a battery is installed in the handle, and a first switch and a second switch are installed on the outer wall of the handle, the The first motor is electrically connected to the battery through a first wire and the first switch is electrically connected in the first wire, the second motor is electrically connected to the battery through a second wire and the second switch is electrically connected Electrically connected in the second wire.

Further, in order to better realize the present invention, the cavity in the inner tube is an inner hole, the cavity between the inner tube and the outer tube is an outer hole, and the diameter of the inner hole is smaller than that of the the diameter of the outer hole, and the outer wall of the inner tube is attached to the inner wall of the outer tube.

Further, in order to better realize the present invention, it also includes a tube body composed of a tapered tube and a straight tube, the tapered bottom end of the tapered tube is arranged on the right end of the outer tube, and the straight tube is arranged on the tapered tube. the tapered top end of the tube, and the tapered tube is arranged coaxially with the straight tube and the outer tube;

The inner wall of the pipe body is provided with a convex portion, the convex portion is provided with a flow channel penetrating the left and right ends of the pipe body, and the left end of the flow channel is connected with the inner hole.

Further, in order to better realize the present invention, a cover capable of sealing the right end of the straight pipe is also included, and the cover is screwed on the right end of the straight pipe.

Further, in order to better realize the present invention, the right end of the first push rod is provided with a first push plate, the first push plate is adapted to the first piston, and the right end of the second push rod is provided with a first push plate. There is a second push plate and the second push plate is adapted to the second piston.

Further, in order to better realize the present invention, the right end of the second piston is provided with a conical block adapted to the tapered pipe, and the center position of the end face of the right end of the conical block is provided with a conical block adapted to the straight pipe. matching plug.

Further, in order to better realize the present invention, the outer wall of the right end of the outer casing is provided with a left mounting ear, the outer wall of the left end of the outer tube is provided with a right mounting ear, and the left mounting ear and the right mounting ear pass through. Tighten the screw.

Compared with the prior art, the present invention has the following beneficial effects:

The injection device for hemostasis of the cervical vertebral canal venous plexus provided by the invention comprises an inner tube and an outer tube, the inner tube is fixed in the outer tube, the right end of the inner tube and the right end of the outer tube are flush, and the inner tube is filled with fluid gelatin, The outer tube is equipped with gelatin sponge, and the inner tube is also equipped with a matching first piston, the cavity between the outer tube and the inner tube is equipped with a matching second piston, and also includes an outer casing and a fitting inside the outer casing. The first and second flattening devices, the outer casing is connected with the left end of the above-mentioned outer tube, the power output end of the first flattening device extends into the inner tube and is connected with the first piston to drive the first piston in the inner tube The fluid gelatin in the inner tube is pushed out from the right end of the inner tube, and the power output end of the second flat pushing device extends into the cavity between the outer tube and the inner tube and acts on the second piston to drive the second piston Push out the gelatin sponge in the outer tube, through the above structure, when the cervical vertebral canal venous plexus needs to be stopped during the operation, the user first controls the first flat push device to push an appropriate amount of fluid gelatin to the right end of the inner tube, Then the second flat push device can be manipulated to push the gelatin sponge to the right end of the outer tube, and the fluid gelatin enters from the space at the cervical spinal venous plexus to perform chemical hemostasis. The space and the fluid gelatin that reaches the place are compressed to play physical hemostasis. In this way, with the help of the joint action of the fluid gelatin and the gelatin sponge, the bleeding site of the cervical spinal canal venous plexus can be quickly and effectively stopped. The amount of fluid gelatin at the cervical spinal venous plexus coming out of the inner tube can be controlled as needed to reduce waste.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic structural diagram of an injection device for hemostasis of cervical vertebral canal venous plexus according to an embodiment of the present invention;

Fig. 2 is a partial enlarged view of A region in Fig. 1;

FIG. 3 is an exploded view of the structure shown in FIG. 1 .

In the picture:

1-fluid gelatin; 2-inner tube; 3-gelatin sponge; 4-outer tube; 5-first piston; 6-second piston; 7-shell; 8-first pusher device; 81-first motor; 82-first screw; 83-first nut; 84-first push rod; 85-first coupling; 86-first support plate; 9-second push device; 91-second motor; 92 -2nd screw; 93-second nut; 94-second push rod; 95-second coupling; 96-second support plate; 10-grip; 11-battery; 12-first switch; 13 -2nd switch; 14-cone pipe; 15-straight pipe; 16-cover; 17-first push plate; 18-second push plate; 19-cone block; 20-insert block; 21-left mounting ear; 22-right mounting ear; 23-screw.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1:

This embodiment provides an injection device for hemostasis of the cervical vertebral venous plexus, which is used to quickly and effectively stop the bleeding of the cervical vertebral venous plexus during surgery, so as to reduce the injury to the patient and the intraoperative complications probability of occurrence.

As shown in Figures 1 and 3, the cervical vertebral canal venous plexus hemostasis injection device includes an inner tube 2 and an outer tube 4, the inner tube 2 is fixed in the outer tube 4, at this time, the cavity in the inner tube 2 is In the inner hole, the cavity between the inner tube 2 and the outer tube 4 is an outer hole, and the diameter of the outer hole is larger than that of the inner hole, that is, the cross-sectional area of the outer hole is larger than that of the inner hole. The fluid gelatin 1 is housed in the above-mentioned inner pipe 2, the gelatin sponge 3 is housed in the cavity between the outer pipe 4 and the inner pipe 2, the first piston 5 that fits is installed in the inner pipe 2, the outer pipe 4 and the inner pipe A second piston 6 is installed in the cavity between Push out from the right end of the outer tube 4 .

It also includes a housing 7 and a first flat pushing device 8 and a second flat pushing device 9 installed in the housing 7. Both the power output end of the first flat pushing device 8 and the power output end of the second flat pushing device 9 can extend out of the housing. 7, the right end of the casing 7 and the left end of the above-mentioned outer tube 4 are detachably fixed together, and the power output end of the above-mentioned first pusher 8 extends into the above-mentioned inner tube 2 from the left end and acts on the first piston 5. It is worth noting that the above-mentioned fluid gelatin 1 is located at the right end of the first piston 5, and at this time, the first piston 5 can be driven to push out the fluid gelatin 1 from the right end of the inner tube 2 when the first pusher 8 is in operation, The power output end of the above-mentioned second pusher 9 extends into the above-mentioned outer hole from the left end and acts on the left end of the second piston 6, and the above-mentioned gelatin sponge 3 is placed on the right end of the second piston 6, so this second pusher 9 During operation, the second piston 6 can be driven to push out the gelatin sponge 3 from the right end of the outer tube 4 .

With the above structure, when the injection device for hemostasis of cervical vertebral canal venous plexus provided in this embodiment is in use, the above-mentioned outer tube 4 is aligned with the bleeding site of cervical vertebral canal venous plexus, and firstly, the first flattening device 8 and the second vertebral plexus are operated. The two pushers 9 operate simultaneously to push the fluid gelatin 1 to the right end of the inner tube 2 and push the gelatin sponge 3 to the right end of the outer tube 4, and then operate the first pusher 8 to push an appropriate amount of fluid gelatin 1 from the inner tube 2 The right end is pushed out, and the pushed out fluid gelatin 1 will enter and quickly diffuse into the space at the bleeding site of the cervical spinal canal venous plexus and act on the bleeding site to perform chemical hemostasis. When the amount of fluid gelatin 1 pushed out reaches an appropriate amount, it can be controlled The second flat push device 9 is to push out the gelatin sponge 3, due to the connectivity of the manipulation, the gelatin sponge 3 can be seamlessly connected on the outflowing fluid gelatin 1, and the gelatin sponge 3 encounters blood and immediately produces swelling and is compressed on the cervical vertebra. The gap of the vascular venous plexus hemorrhage and the bleeding site and the fluid gelatin 1 reaching the bleeding site can be compressed to achieve physical hemostasis. Hemostatic effect, and the medical staff can control the amount of fluid gelatin 1 flowing out of the inner tube 2 as required, thereby reducing waste.

As a best implementation of this embodiment, in this embodiment, a left mounting ear 21 is provided on the outer wall of the right end of the outer casing 7, and a right mounting ear 22 is provided on the outer wall of the left end of the outer tube 4. The shape and size are adapted to the shape and size of the shell 1. During installation, the shell 7 and the outer tube 4 are put together so that the left mounting ear 21 and the right mounting ear 22 are attached, and then the left mounting ear 21 and the right mounting ear 21 are installed with screws 23. The ears 22 are connected together. With this structure, the outer shell 7 and the outer tube 4 can be quickly disassembled and assembled, and when the gelatin sponge 3 in the outer tube 4 and/or the fluid gelatin 1 in the inner tube 2 are used up, they can be quickly disassembled and replaced. .

As a more preferred implementation of this embodiment, the inner tube 2 and the outer tube 4 in this embodiment are both structural parts made of transparent materials, such as plexiglass or transparent plastic, so that the user can observe the outer tube 4 and the In the case of the inner tube 2, and the outer tube 4 and the tube wall of the inner tube 2 are provided with scale lines (not shown in the figure), so as to facilitate the user to control the amount of fluid gelatin 1 pushed out of the inner tube 2.

Example 2:

This embodiment is a specific implementation of Embodiment 1. The first flat pushing device 8 in this embodiment includes a first motor 81 , a first lead screw 82 , a first nut 83 and a first push rod 84 . A motor 81 is installed in the housing 7 with the rotating shaft of the first motor 81 facing right, the first lead screw 82 is connected to the rotating shaft of the first motor 81 through the first coupling 85 and the first lead screw 82 is The axial direction is also to the right, the first nut 83 is screwed on the first lead screw 82, the first push rod 84 is connected to the outer wall of the first nut 83, and the right end of the first push rod 84 extends out of the housing 7 and It extends into the inner tube 2 to be connected with the first piston 5. When the first motor 84 runs, it can drive the first lead screw 82 to rotate. The first nut 83 is restricted by the first push rod 84 and can only operate in the first The lead screw 82 generates translation, thereby driving the first push rod 84 to translate, thereby pushing the first piston 5 . The inner wall of the housing 7 is provided with a first support plate 86, the number of the first support plate 86 is two, the two ends of the first lead screw 82 are respectively rotated and inserted on the two first support plates 86, and more Preferably, both ends of the first lead screw 82 are provided with round shafts, and the round shafts are connected to the corresponding first support plates 86 through bearings, so that the rotation of the first lead screw 82 is smoother.

By adopting this structure, the movement of the power output end (ie, the first push rod 84 ) of the first pusher 8 can be effectively controlled, so that the medical staff can control the fluid gelatin pushed out by the first piston 5 as required. 1 amount.

More preferably, the second pusher 9 includes a second motor 91 , a second lead screw 92 , a second nut 93 and a second push rod 94 , the second motor 91 is installed in the housing 7 and the second motor 91 is The rotating shaft faces to the right, the second lead screw 92 is connected to the rotating shaft of the second motor 91 through the second coupling 95, and the axial direction of the second lead screw 92 is also directed to the right, and the second nut 93 is screwed on the rotating shaft of the second motor 91. On the above-mentioned second lead screw 92, the second push rod 94 is connected to the outer wall of the second nut 93, and the right end of the second push rod 94 protrudes out of the casing 7 and into the cavity between the inner tube 2 and the outer tube 4 The middle is connected to the second piston 6. When the second motor 91 is running, it can drive the second lead screw 92 to rotate. The second nut 93 is restricted by the second push rod 94 and can only be generated on the second lead screw 92. Translate, thereby driving the second push rod 94 to translate, thereby pushing the second piston 6 . The inner wall of the casing 7 is provided with a second support plate 96, the number of the second support plate 96 is two, the two ends of the second lead screw 92 are respectively rotated and inserted on the two second support plates 96, more Preferably, both ends of the second lead screw 92 are provided with round rods, and the round rods are connected to the corresponding second support plates 96 through bearings, so that the rotation of the second lead screw 92 is smoother.

By adopting this structure, the movement of the power output end (that is, the second push rod 94 ) of the second pusher 9 can be effectively controlled, so that the medical staff can control the gelfoam 3 to push out in time as needed, and ensure that the gelfoam 3 is pushed out in time. 3 forms a seamless connection with the fluid gelatin 1.

As a best implementation of this embodiment, in this embodiment, a handle 10 is installed on the left end of the above-mentioned casing 7. Specifically, the handle 10 is a shell structure and is installed on the casing by tightening screws Left end of 7. A battery 11 is installed in the handle 10, and a first switch 12 and a second switch 13 are installed on the outer wall of the handle 10. The first motor 81 is electrically connected to the battery 11 through a first wire, and the first switch 12 is electrically connected to the handle 10. Connected in the first wire, the second motor 91 is electrically connected with the battery 11 through the second wire and the second switch 13 is electrically connected in the second wire. When in use, the medical staff holds the handle 10, and manually controls the opening and closing of the first switch 12 and the second switch 13, and can control the working state of the first motor 81 and the second motor 91, so as to further improve the present embodiment. The provided injection device for hemostasis of the cervical vertebral canal venous plexus has better controllability and better control effect, thereby further reducing waste and ensuring the seamless connection between the gelatin sponge 3 and the fluid gelatin 1 .

Preferably, the first motor 81 and the second motor 81 in this embodiment are both forward and reverse motors, and the first push rod 84 and/or the second push rod 94 can be easily retracted after being pushed out.

Example 3:

This embodiment is a more preferred implementation of the above-mentioned embodiment. In this embodiment, a tapered pipe 14 is also connected to the right end of the above-mentioned outer pipe 4 . Specifically, the cone bottom end of the above-mentioned outer pipe 4 is connected to the above-mentioned outer pipe 4 . , a straight pipe 15 is connected to the top of the tapered pipe 14. At this time, the tapered pipe 14 is coaxial with the straight pipe 15 and the outer pipe 4, and the tapered pipe 14 and the straight pipe 15 form a pipe body. It is connected with the outer tube 4 and between the tapered tube 14 and the straight tube 15 by integral molding. The inner wall of the above-mentioned tube body is provided with a convex portion, and the convex portion is provided with a flow channel, which runs through the tube. The left end wall and the right end wall of the body, and the left end of the flow channel communicates with the inner hole.

As another specific implementation of this embodiment, the tapered tube 14 in this embodiment is integrally formed with the straight tube 15 and the outer tube 4 to form a through tube, and the above-mentioned inner tube 2 is directly attached to the tube wall of the through tube And the right end of the inner tube 2 is flush with the right end of the above-mentioned straight tube 15 .

With this structure, the diameter of the above-mentioned straight pipe 15 is smaller than that of the outer pipe 4. In this way, different diameters of the straight pipes 15 can be designed to satisfy the different diameters of the bleeding ports. Different models are made, and medical staff can choose corresponding models according to their needs, so as to ensure that the fluid gelatin 1 can accurately enter the bleeding site of the cervical spinal canal venous plexus. Preferably, the shape and size of the opening at the right end of the straight tube 15 are adapted to the shape and size of the bony structure of the spinal canal venous plexus at the intervertebral foramen.

Example 4:

This embodiment is a more preferred embodiment of Embodiment 3. In this embodiment, a cover 16 capable of covering the straight pipe 15 is screwed to the right end of the above-mentioned straight pipe 15. When it is not needed, the cover 16 can be used to cover it. to avoid leakage of the fluid gelatin 1, and to reduce the contamination of the fluid gelatin 1 and the gelatin sponge 3 by the external environment, so as to maintain hygiene. When needed, the cover 16 can be removed.

Example 5:

This embodiment is a more preferred implementation of the above-mentioned embodiment. In this embodiment, a first push plate 17 is provided at the right end of the above-mentioned first push rod 84 , and the first push plate 17 can translate in the inner tube 2 , and the first push plate 17 is adapted to the first piston 5, so that the first push rod 84 can better push the first piston 5, and the right end of the second push rod 94 is provided with a second push rod 94. The push plate 18, the second push plate 18 can translate in the gap between the inner tube 2 and the outer tube 4, and the second push plate 18 is adapted to the second piston 6, so that the second push rod 94 can be The second piston 6 can be pushed better.

Example 6:

This embodiment is a more preferred implementation of the above-mentioned embodiment. In this embodiment, the right end of the second piston 6 is provided with a conical block 19 adapted to the tapered tube 14, and the conical block 19 can enter the cone. In the pipe 14 , an insert block 20 is provided at the center of the right end face of the conical block 19 , and the insert block 20 can enter the straight pipe 15 . With this structure, when the second push rod 94 pushes the second piston 6 to move to the right, the direct parts that the second piston 6 acts on the gelatin sponge 3 are the end face of the tapered block 19 and the end face of the insert block 20, so that the The area is smaller, so that the gelatin sponge 3 can be pushed out of the straight tube 15 smoothly.

As another implementation of this embodiment, in this embodiment, the second push rod 94 can also be directly used to act on the gelatin sponge 3, and the second push rod 94 can be made into a straight pipe that fits with the above-mentioned straight pipe 15. rod structure.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. An injection device for hemostasis of the venous plexus of the cervical spine, comprising:

the device comprises an inner pipe and an outer pipe, wherein the inner pipe is filled with fluid gelatin, the outer pipe is filled with gelatin sponge, the inner pipe is fixedly connected in the outer pipe, the right end of the inner pipe is flush with the right end of the outer pipe, a first piston is arranged in the inner pipe, and a second piston is arranged in a cavity between the outer pipe and the inner pipe;

the shell and dress are in first flat push device and the second flat push device in the shell, the shell connect in the left end of outer tube, the power take off end of first flat push device stretch into in the inner tube and with first piston links to each other in order to be used for with fluid gelatin follows the right-hand member of inner tube is released, the power take off end of second flat push device stretch into the outer tube with in the cavity between the inner tube and with the second piston links to each other in order to be used for with gelatin sponge follows the right-hand member of outer tube is released.

2. The injection device for hemostasis of the venous plexus of a cervical spine according to claim 1, wherein: first flat push device includes first motor, first lead screw, first nut and first push rod, first motor is installed in the shell, first lead screw is in through first coupling joint in the pivot of first motor, first nut spiro union is in on the first lead screw, first push rod is connected on the first nut outer wall, it is right to be equipped with on the inner wall of shell first lead screw forms the first backup pad that supports, the right-hand member of first push rod stretch into in the inner tube and with first piston links to each other.

3. The injection device for hemostasis of the venous plexus of the cervical spine according to claim 2, wherein: the second horizontal pushing device comprises a second motor, a second lead screw, a second nut and a second push rod, the second motor is installed in the shell, the second lead screw is connected to a rotating shaft of the second motor through a second coupler, the second nut is in threaded connection with the second lead screw, the second push rod is connected to the outer wall of the second nut, a second supporting plate supporting the second lead screw is further arranged on the inner wall of the shell, and the right end of the second push rod extends into a cavity between the outer tube and the inner tube.

4. The injection device for hemostasis of the venous plexus of the cervical spine according to claim 3, wherein: still including installing the grab handle of shell left end, install the battery in the grab handle, and install first switch and second switch on the outer wall of grab handle, first motor through first wire with the battery electricity is connected just first switch electricity is connected in the first wire, the second motor through the second wire with the battery electricity is connected just second switch electricity is connected in the second electric wire.

5. The injection device for hemostasis of the venous plexus of the cervical spine according to claim 4, wherein: the cavity in the inner tube is an inner hole, the cavity between the inner tube and the outer tube is an outer hole, the aperture of the inner hole is smaller than that of the outer hole, and the outer wall of the inner tube is attached to the inner wall of the outer tube.

6. The injection device for hemostasis of the venous plexus of the cervical spine according to claim 5, wherein: the conical pipe is characterized by also comprising a pipe body consisting of a conical pipe and a straight pipe, wherein the conical bottom end of the conical pipe is connected to the right end of the outer pipe, the straight pipe is arranged at the conical top end of the conical pipe, and the conical pipe, the straight pipe and the outer pipe are coaxially arranged;

the inner wall of the tube body is provided with a convex part, the convex part is provided with a flow passage which penetrates through the left end and the right end of the tube body, and the left end of the flow passage is communicated with the inner hole.

7. The injection device for hemostasis of the venous plexus of the cervical spine according to claim 6, wherein: the cover can seal the right end of the straight pipe, and the cover is screwed on the straight pipe.

8. The injection device for hemostasis of the venous plexus of a cervical spine according to claim 7, wherein: the right-hand member of first push rod is equipped with first push pedal, first push pedal with first piston adaptation, the right-hand member of second push rod is equipped with the second push pedal just the second push pedal with second piston adaptation.

9. The injection device for hemostasis of the venous plexus of a cervical spine according to claim 8, wherein: the right end of the second piston is provided with a conical block matched with the conical pipe, and the center of the end face of the right end of the conical block is provided with an inserting block matched with the straight pipe.

10. An injection device for hemostasis of the venous plexus of a cervical spine according to any one of claims 1-9, wherein: the outer tube is characterized in that a left mounting lug is arranged on the outer wall of the right end of the outer shell, a right mounting lug is arranged on the outer wall of the left end of the outer tube, and the left mounting lug and the right mounting lug are locked through screws.

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