Puncture device for assisting venipuncture

Abstract

The application discloses a kind of puncture equipment for assisting venipuncture, including controller, puncture table, appearance mechanism and auxiliary mechanism, one side of puncture table forms puncture area, and puncture area is used to place human hand;Appearance mechanism and auxiliary mechanism are respectively arranged in the side of puncture table forming puncture area, controller is electrically connected with appearance mechanism and auxiliary mechanism respectively, and controller is used to control appearance mechanism, to make the vein blood vessel of human hand in puncture area appear;Auxiliary mechanism is used to obtain the image of hand vein blood vessel appearance and send to controller;Controller is used to mark vein path and puncture point to hand image respectively.The technical scheme in the application proposes that the vein blood vessel of human hand is assisted to appear by appearance mechanism, and the vein path and puncture point after appearance are marked in cooperation with auxiliary mechanism, so that medical staff can be quickly assisted to carry out venipuncture, reduce the dependence of medical staff on personal experience, and improve medical efficiency.

Description

Technical Field

[0001] This invention relates to the field of venipuncture technology, and in particular to a puncture device for assisting venipuncture. Background Technology

[0002] Venipuncture is generally used for intravenous injection or blood collection. Intravenous injection is a medical procedure used when liquid substances such as blood, medications, or nutritional solutions are unsuitable for oral, subcutaneous, or intramuscular injection and require rapid efficacy; intravenous injection or infusion is employed. Both intravenous infusion and blood collection require venipuncture, inserting a needle into the patient's vein. Current practices primarily rely on the experience and feel of medical staff, performing manual punctures. This undoubtedly increases the workload of medical personnel, especially when patients are concentrated in one area. Furthermore, for patients with blood loss, obesity, or darker skin tones, it is difficult for medical staff to quickly locate veins visually. Even if the location and puncture point are found, rapid puncture is not always possible. Summary of the Invention

[0003] The main objective of this invention is to provide a puncture device that assists in intravenous puncture, aiming to solve the problem that medical staff rely entirely on personal experience for intravenous injection.

[0004] To achieve the above objectives, the technical solution proposed by this invention is as follows:

[0005] A puncture device for assisting venipuncture includes a controller, a puncture table, a visualization mechanism, and an auxiliary mechanism. One side of the puncture table forms a puncture area for placing a human hand. The visualization mechanism and the auxiliary mechanism are respectively disposed on the side of the puncture table forming the puncture area. The controller is electrically connected to both the visualization mechanism and the auxiliary mechanism. The controller controls the visualization mechanism to visualize the veins of the human hand located within the puncture area. The auxiliary mechanism acquires an image of the visualized veins and sends it to the controller. The controller performs vein path labeling and puncture point labeling on the hand image.

[0006] Preferably, the puncture table includes a base, a top plate, and a connecting plate. The base is arranged parallel to and spaced apart from the top plate on the side facing the top plate. The connecting plate is disposed between the base and the top plate, with one end of the connecting plate connected to the base and the other end connected to the top plate. The puncture area is formed on the side of the base facing the top plate. The visualization mechanism is disposed on the base. The auxiliary mechanism is disposed on the top plate.

[0007] Preferably, the auxiliary mechanism includes a camera, a display screen, and an auxiliary light source. The camera is located on the side of the top plate facing the base, and the display screen is used to acquire the hand image. The display screen is located on the side of the top plate away from the base and is used to display the labeled hand image. The auxiliary light source is located on the side of the connecting plate near the puncture area, and the camera and the auxiliary light source are respectively used to align the human hand within the puncture area.

[0008] Preferably, the auxiliary mechanism further includes an mounting strip and a slide rail. The slide rail is disposed on the side of the top plate facing the base. The slide rail is provided with a first electrically controlled slide base. The mounting strip is disposed on the first electrically controlled slide base. A plurality of marking light sources are disposed on the side of the mounting strip away from the first electrically controlled slide base. Each marking light source is arranged sequentially along the length direction of the mounting strip. The marking light sources are used to project light spots onto the human hand. The mounting strip is perpendicular to the slide rail. The controller is electrically connected to the first electrically controlled slide base and each of the marking light sources. The controller is used to control the first electrically controlled slide base to drive the mounting strip to move to a position above the puncture point according to the puncture point, so that a marking light source corresponding to the puncture point marks the puncture point on the human hand.

[0009] Preferably, the visualization mechanism includes a first hoop and a second hoop. The second hoop is fixed to the side of the base facing the top plate, and the first hoop is disposed near one end of the base. The first hoop is located on the side of the second hoop facing the top plate. One end of the first hoop and one end of the second hoop are hinged together, and the other ends of the first hoop and the second hoop are detachably connected. A wrapping space is formed between the first hoop and the second hoop. A first flexible layer is provided on the side of the first hoop and the second hoop facing the wrapping space. The wrapping space is used to wrap the proximal point of the human hand inserted into the puncture area. The first flexible layer compresses the proximal point to visualize the vein.

[0010] Preferably, an electrically controlled magnetic lock is provided at the end of the first hoop away from the hinge, and a lock seat is provided at the end of the second hoop away from the hinge. The controller is electrically connected to the electrically controlled magnetic lock and is used to control the opening and closing of the electrically controlled magnetic lock so that the electrically controlled magnetic lock and the lock seat are detachably connected.

[0011] Preferably, the visualization mechanism further includes a roller and two slides, the roller and the two slides being respectively disposed on the side of the base facing the top plate; the two slides are arranged parallel and spaced apart, the puncture area is located between the two slides, and each slide extends from the first hoop along the direction in which the human hand extends into the puncture area; the outer edge of the roller is wrapped with a second flexible layer, and a pushing gap is formed between the roller and the base, the pushing gap being used to allow the human hand located in the puncture area to extend in; each slide is respectively provided with a second electrically controlled slide, wherein one second electrically controlled slide is rotatably connected to one end of the roller, and the other second electrically controlled slide is rotatably connected to the other end of the roller, and the controller is electrically connected to each second electrically controlled slide, the controller being used to control each second electrically controlled slide to drive the roller to move along the slide, the roller pushing the human hand back and forth from the distal end to the proximal end to visualize the veins.

[0012] Preferably, a limiting plate is provided between the roller and the base, the limiting plate is parallel to the top plate, and the puncture area is formed on the side of the limiting plate facing the top plate; a lifter is provided on the side of the base facing the top plate, the output end of the lifter is connected to the limiting plate, and a controller is electrically connected to the limiting plate. The controller is used to drive the limiting plate to rise and fall, and adjust the vertical distance of the pushing gap between the limiting plate and the roller.

[0013] Preferably, a skin-friendly layer is provided on the side of the limiting plate facing the top plate, and a receiving groove is formed on the side of the skin-friendly layer facing away from the limiting plate, the receiving groove being used to receive a human hand.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] By using a visualization device to visualize veins in the human hand, and then using an auxiliary device to mark the visualized vein path and puncture point, medical staff can be quickly assisted in performing venipuncture, reducing their reliance on personal experience and improving medical efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an embodiment of a puncture device for assisting intravenous puncture according to the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure viewed from the left;

[0019] Figure 3 A top view of the base after removing the first and second hoops.

[0020] Explanation of icon numbers:

[0021] 1-Puncture table; 11-Puncture area; 12-Base; 13-Top plate; 14-Connecting plate; 15-Limiting plate; 16-Lifting device; 17-Ring body; 18-Rectangular through hole;

[0022] 2-Display mechanism; 21-First hoop; 22-Second hoop; 23-Wrapping space; 24-Electrically controlled magnetic lock; 25-Roller; 26-Slide groove; 27-Pushing gap; 28-Second electrically controlled slide;

[0023] 3-Auxiliary mechanism; 31-Camera; 32-Display screen; 33-Auxiliary light source; 34-Mounting strip; 35-Marking light source; 36-Slide rail; 37-First electrically controlled slide;

[0024] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0027] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0030] This invention proposes a puncture device to assist in venipuncture.

[0031] like Figures 1 to 3 The illustrated venipuncture device includes a controller (not shown), a puncture table 1, a visualization mechanism 2, and an auxiliary mechanism 3. A puncture area 11 is formed on one side of the puncture table 1, which is used to place a human hand. The visualization mechanism 2 and the auxiliary mechanism 3 are respectively located on one side of the puncture table 1 forming the puncture area 11. The controller is electrically connected to both the visualization mechanism 2 and the auxiliary mechanism 3. The controller controls the visualization mechanism 2 to visualize the veins of the human hand located within the puncture area 11. The auxiliary mechanism 3 acquires images of the visualized veins and sends them to the controller. The controller marks the vein path and puncture point on the hand images.

[0032] The visualization device 2 assists in visualizing the veins in the human hand. With the assistance of other devices, the vein path and puncture point are marked after visualization. This can quickly assist medical staff in performing vein puncture, reduce the reliance of medical staff on personal experience, and improve medical efficiency.

[0033] Specifically, the controller is used to mark at least one optimal path among the veins in hand images; the color used to mark the optimal path is similar to the color used to mark the vein, for example, the vein is marked in black and the shortest path is marked in red. The optimal path is the segment of the vein with the highest clarity and the greatest straightness. This can further reduce the difficulty for medical staff to perform venipuncture.

[0034] Specifically, the controller is also used to generate puncture length data based on the optimal path. The puncture length data is the length of the puncture needle inserted into the human body, which can provide a reference for medical staff to avoid causing excessive harm to the patient by inserting the puncture needle too deeply or too shallowly.

[0035] Specifically, the controller obtains puncture data from the hospital for a preset time period and marks the corresponding vein path as a non-recommended puncture path when the puncture data exceeds a warning threshold. This avoids multiple punctures of the same vein within a certain period, reducing harm to the patient. For example, if a patient has three puncture paths in their hand, one of which has been punctured three times within a week, and the other two have not been punctured, even if the vein path is clear and straight, it will only be marked as a non-recommended puncture path, not the optimal path, effectively preventing repeated injury.

[0036] Specifically, puncture devices for assisted venipuncture are mainly used for venipuncture in the back of the hand.

[0037] The puncture table 1 includes a base 12, a top plate 13, and a connecting plate 14. The base 12 is positioned parallel to and spaced apart from the top plate 13 on the side facing the top plate 13. The connecting plate 14 is positioned between the base 12 and the top plate 13, with one end connected to the base 12 and the other end connected to the top plate 13. The side of the base 12 facing the top plate 13 forms a puncture area 11. A visualization mechanism 2 is located on the base 12, and an auxiliary mechanism 3 is located on the top plate 13. The puncture table has a simple structure and does not affect the puncture operations performed by medical personnel.

[0038] The auxiliary mechanism 3 includes a camera 31, a display screen 32, and an auxiliary light source 33. The camera 31 is located on the side of the top plate 13 facing the base 12, and the display screen 32 is used to acquire hand images. The display screen 32 is also located on the side of the top plate 13 away from the base 12, and is used to display the marked hand image. The auxiliary light source 33 is located on the side of the connecting plate 14 near the puncture area 11. The camera 31 and the auxiliary light source 33 are respectively used to align with the human hand within the puncture area 11. The position of the display screen 32 is designed to suit the working habits of medical staff. During puncture, patients are generally sitting or lying down, while medical staff are standing. This allows medical staff to easily observe the marked hand image on the display screen 32, facilitating the observation of the vein path and puncture point.

[0039] Specifically, the top plate 13 is set horizontally, which makes it easier for the camera 31 to obtain the best shooting angle; the side of the connecting plate 14 near the puncture area 11 is arc-shaped, and the auxiliary light source 33 is set close to the top plate 13, which improves the clarity of the human hand without affecting the operation of the camera 31.

[0040] The auxiliary mechanism 3 also includes a mounting strip 34 and a slide rail 36. The slide rail 36 is located on the side of the top plate 13 facing the base 12. The slide rail 36 is equipped with a first electrically controlled slide 37. The mounting strip 34 is located on the first electrically controlled slide 37. Several marking light sources 35 are arranged on the side of the mounting strip 34 away from the first electrically controlled slide 37. Each marking light source 35 is arranged sequentially along the length of the mounting strip 34. The marking light sources 35 are used to project light spots onto the human hand. The mounting strip 34 is perpendicular to the slide rail 36. The controller is electrically connected to the first electrically controlled slide 37 and each marking light source 35. The controller is used to control the first electrically controlled slide 37 to drive the mounting strip 34 to move to a position above the puncture point according to the puncture point, so that a marking light source 35 corresponding to the puncture point marks the puncture point on the human hand. Each marking light source 35 on the mounting strip 34 can display the puncture point in the X-axis direction. The first electronically controlled slide 37 can move along the slide rail 36 to change the position of each marking light source 35 in the Y-axis direction. This achieves positional light spot projection on the entire back of the hand, which can accurately and effectively mark the puncture point.

[0041] Specifically, the brightness of the marked light source 35 is higher than that of the auxiliary light source 33. The auxiliary light source 33 is a white light source, while the marked light source 35 is a red light source, which makes it easy to quickly identify the marked light source 35.

[0042] Specifically, the slide rail 36 is located on one side of the camera 31, and the initial positions of the first electrically controlled slide 37 and the mounting strip 34 are located on one side of the camera 31. The controller is used to control the first electrically controlled slide 37 to move along the slide rail 36 from its initial position after determining the puncture point, and to control the first electrically controlled slide 37 to reset after the puncture is completed. This can prevent the mounting strip 34 from obstructing the camera 31 and effectively ensure the clarity of the hand image.

[0043] The visualization mechanism 2 includes a first hoop 21 and a second hoop 22. The second hoop 22 is fixed to the side of the base 12 facing the top plate 13, and the first hoop 21 is located near one end of the base 12. The first hoop 21 is located on the side of the second hoop 22 facing the top plate 13. One end of the first hoop 21 and one end of the second hoop 22 are hinged together, and the other end of the first hoop 21 and the other end of the second hoop 22 are detachably connected. A wrapping space 23 is formed between the first hoop 21 and the second hoop 22. A first flexible layer is provided on the side of the first hoop 21 and the second hoop 22 facing the wrapping space 23. The wrapping space 23 is used to wrap the proximal point of the human hand inserted into the puncture area 11. The first flexible layer compresses the proximal point to make the veins swell and become visible. The cooperation of the first hoop 21 and the second hoop 22 can fasten the wrist and compress the veins near the proximal point, causing the veins in the hand to swell and bulge due to congestion.

[0044] An electrically controlled magnetic lock 24 is provided at the end of the first hoop 21 away from the hinge, and a lock seat is provided at the end of the second hoop 22 away from the hinge. The controller is electrically connected to the electrically controlled magnetic lock 24 and is used to control the opening and closing of the electrically controlled magnetic lock 24 so that the electrically controlled magnetic lock 24 and the lock seat can be detachably connected.

[0045] Specifically, the controller is used to control the magnetic attraction force when the electronic magnetic lock 24 is locked, so that the first clamp 21 and the second clamp 22 separate when the patient struggles violently, thus avoiding excessive damage to the wrist caused by violent struggle.

[0046] The visualization mechanism 2 also includes a roller 25 and two slides 26, which are respectively disposed on the side of the base 12 facing the top plate 13; the two slides 26 are arranged in parallel and spaced apart, and the puncture area 11 is located between the two slides 26. Each slide 26 extends from the first hoop 21 along the direction in which the human hand extends into the puncture area 11; the outer edge of the roller 25 is wrapped with a second flexible layer, and a pushing gap 27 is formed between the roller 25 and the base 12. The pushing gap 27 is used to make the area located in the puncture area... A human hand is inserted into the groove 11. Each groove 26 is equipped with a second electrically controlled slide 28. One second electrically controlled slide 28 is rotatably connected to one end of a roller 25, and the other second electrically controlled slide 28 is rotatably connected to the other end of a roller 25. A controller is electrically connected to each second electrically controlled slide 28. The controller controls each second electrically controlled slide 28 to drive the roller 25 to move along the groove 26. The roller 25 pushes the human hand back and forth from the distal end to the proximal end to make the veins visible. The cooperation between the second electrically controlled slide and the groove 26 allows the roller 25 to simulate the finger pushing method to help make the veins in the hand visible.

[0047] Specifically, the roller 25 is used to press the fingers of the hand so that the roller 25, together with the first hoop 21 and the second hoop 22, fixes the hand within the puncture area 11, preventing slight movement from causing secondary injury to the puncture needle.

[0048] A limiting plate 15 is provided between the roller 25 and the base 12. The limiting plate 15 is parallel to the top plate 13, and the side of the limiting plate 15 facing the top plate 13 forms a puncture area 11. A lifter 16 is provided on the side of the base 12 facing the top plate 13. The output end of the lifter 16 is connected to the limiting plate 15, and a controller is electrically connected to the limiting plate 15. The controller is used to drive the limiting plate 15 to rise and fall, and adjust the vertical distance of the pushing gap 27 between the limiting plate 15 and the roller 25. The setting of the limiting plate 15 and the lifter 16 allows medical staff to adjust the clamping gap according to different hand sizes, thus ensuring the effectiveness of the roller 25 when pressing the hand.

[0049] A skin-friendly layer is provided on the side of the limiting plate 15 facing the top plate 13, and a receiving groove is formed on the side of the skin-friendly layer away from the limiting plate 15. The receiving groove is used to receive a human hand.

[0050] Specifically, the skin-friendly layer, the first flexible layer, and the second flexible layer are all flexible silicone layers. Silicone has a bactericidal effect and is easy to disinfect.

[0051] Specifically, a ring 17 is provided on the side of the connecting plate 14 opposite to the puncture area 11. The outer edge of the ring 17 is connected to the connecting plate 14, and the ring 17 is vertically oriented and used to suspend the blood collection bottle. The connecting plate 14 has a rectangular through hole 18, the extension direction of which is parallel to the insertion path of the hand into the puncture area 11. The rectangular through hole 18 is used for the passage of the blood collection tube. This design can prevent the patient from directly observing the blood collection bottle collecting blood, effectively avoiding crying in young children and fainting from blood in some patients.

[0052] Specifically, the end of the rectangular through hole 18 furthest from the first hoop 21 passes through the connecting plate 14. This facilitates the entry of the blood collection tube.

[0053] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A puncture device for assisting intravenous puncture, characterized in that, The device includes a controller, a puncture table, a visualization mechanism, and an auxiliary mechanism. One side of the puncture table forms a puncture area for placing a human hand. The visualization mechanism and the auxiliary mechanism are respectively located on the side of the puncture table forming the puncture area. The controller is electrically connected to both the visualization mechanism and the auxiliary mechanism. The controller controls the visualization mechanism to visualize the veins of the human hand located within the puncture area. The auxiliary mechanism acquires the visualized hand image and sends it to the controller. The controller performs vein path labeling and puncture point labeling on the hand image. The controller is used to mark at least one optimal path among the veins in hand images; the color used to mark the optimal path is easy to use for marking the vein paths. The controller is used to obtain puncture data from the hospital for a preset time period and to mark the corresponding venous path as a non-recommended puncture path when the puncture data exceeds the warning value. The puncture table includes a base, a top plate, and a connecting plate. The base is positioned parallel to and spaced apart from the top plate on the side facing the top plate. The connecting plate is disposed between the base and the top plate, with one end connected to the base and the other end connected to the top plate. The puncture area is formed on the side of the base facing the top plate. The visualization mechanism is disposed on the base. The auxiliary mechanism is disposed on the top plate. The auxiliary mechanism includes a camera, a display screen, and an auxiliary light source. The camera is located on the side of the top plate facing the base, and the display screen is used to acquire the hand image. The display screen is located on the side of the top plate away from the base and is used to display the labeled hand image. The auxiliary light source is located on the side of the connecting plate near the puncture area, and the camera and the auxiliary light source are respectively used to align with the human hand within the puncture area. The top plate is set horizontally; the side of the connecting plate closest to the puncture area is arc-shaped, and the auxiliary light is set close to the top plate; The auxiliary mechanism further includes an mounting strip and a slide rail. The slide rail is disposed on the side of the top plate facing the base. The slide rail is provided with a first electrically controlled slide base. The mounting strip is disposed on the first electrically controlled slide base. A plurality of marking light sources are disposed on the side of the mounting strip away from the first electrically controlled slide base. Each marking light source is arranged sequentially along the length of the mounting strip. The marking light sources are used to project light spots onto the human hand. The mounting strip is perpendicular to the slide rail. The controller is electrically connected to the first electrically controlled slide base and each of the marking light sources. The controller is used to control the first electrically controlled slide base to drive the mounting strip to a position above the puncture point according to the puncture point, so that a marking light source corresponding to the puncture point marks the puncture point on the human hand. The slide rail is located on one side of the camera. The initial position of the first electrically controlled slide and the mounting strip is located on one side of the camera. The controller is used to control the first electrically controlled slide to move along the slide rail from its initial position after determining the puncture point, and to control the first electrically controlled slide to reset after the puncture is completed. A ring is provided on the side of the connecting plate away from the puncture area. The outer edge of the ring is connected to the connecting plate. The ring is vertically oriented and is used to suspend the blood collection bottle. The connecting plate has a rectangular through hole. The extension direction of the rectangular through hole is parallel to the insertion path of the hand into the puncture area. The rectangular through hole is used for the passage of the blood collection tube.

2. The puncture device for assisting venipuncture according to claim 1, characterized in that, The visualization mechanism includes a first hoop and a second hoop. The second hoop is fixed to the side of the base facing the top plate, and the first hoop is located near one end of the base. The first hoop is located on the side of the second hoop facing the top plate. One end of the first hoop and one end of the second hoop are hinged together, and the other ends of the first hoop and the second hoop are detachably connected. A wrapping space is formed between the first hoop and the second hoop. A first flexible layer is provided on the side of the first hoop and the second hoop facing the wrapping space. The wrapping space is used to wrap the proximal point of the human hand that extends into the puncture area. The first flexible layer compresses the proximal point to visualize the vein.

3. The puncture device for assisting venipuncture according to claim 2, characterized in that, An electrically controlled magnetic lock is provided at the end of the first hoop away from the hinge, and a lock seat is provided at the end of the second hoop away from the hinge. The controller is electrically connected to the electrically controlled magnetic lock and is used to control the opening and closing of the electrically controlled magnetic lock so that the electrically controlled magnetic lock and the lock seat can be detachably connected.

4. The puncture device for assisting venipuncture according to claim 3, characterized in that, The visualization mechanism further includes a roller and two slides, the roller and the two slides being respectively disposed on the side of the base facing the top plate; the two slides are arranged parallel and spaced apart, the puncture area is located between the two slides, and each slide extends from the first hoop along the direction in which the human hand extends into the puncture area; the outer edge of the roller is wrapped with a second flexible layer, and a pushing gap is formed between the roller and the base, the pushing gap being used to allow the human hand located in the puncture area to extend in; each slide is respectively provided with a second electrically controlled slide, wherein one second electrically controlled slide is rotatably connected to one end of the roller, and the other second electrically controlled slide is rotatably connected to the other end of the roller, and the controller is electrically connected to each second electrically controlled slide, the controller being used to control each second electrically controlled slide to drive the roller to move along the slide, the roller pushing the human hand back and forth from the distal end to the proximal end to visualize the veins.

5. The puncture device for assisting venipuncture according to claim 4, characterized in that, A limiting plate is provided between the roller and the base, the limiting plate being parallel to the top plate, and the puncture area is formed on the side of the limiting plate facing the top plate; a lifting device is provided on the side of the base facing the top plate, the output end of the lifting device being connected to the limiting plate, and a controller being electrically connected to the limiting plate, the controller being used to drive the limiting plate to rise and fall, and to adjust the vertical distance of the pushing gap between the limiting plate and the roller.

6. The puncture device for assisting venipuncture according to claim 5, characterized in that, A skin-friendly layer is provided on the side of the limiting plate facing the top plate, and a receiving groove is formed on the side of the skin-friendly layer facing away from the limiting plate. The receiving groove is used to receive a human hand.

Images