Cerebral artery pressurized perfusion equipment

Abstract

This invention provides a cerebral artery pressurized perfusion device, belonging to the technical field of forensic identification auxiliary equipment. It includes an operating table, a reservoir, a first peristaltic pump, perfusion needles, a touch panel, and an electrical control box. The reservoir is placed on the upper surface of the operating table's base plate. The first peristaltic pump is connected to the lower surface of the operating table's top plate. Two perfusion needles and the first peristaltic pump are connected by a flexible hose with a three-way connection. The touch panel is detachably connected to the operating table. The electrical control box is fixedly connected to the upper surface of the operating table's base plate, and the first peristaltic pump is electrically connected to the electrical control box. Compared to traditional manual injection of contrast agent, this invention allows for automatic injection, flexible adjustment of the injection speed, and prevention of air bubble injection, shortening working time while ensuring the quality of subsequent arterial angiography images. It possesses good practicality and economy.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary equipment for judicial appraisal, specifically a cerebral artery pressurization perfusion device. Background Technology

[0002] The brain is densely packed with blood vessels. In modern medicine, the primary method for detecting cerebral artery lesions or injuries is angiography. This involves injecting a contrast agent into the blood vessels, allowing it to distribute within the vascular network as it flows through the bloodstream, facilitating imaging of the vessels using radiographic equipment. In forensic practice, the determination of vascular injury is a crucial component. Generally, injuries and lesions to the superficial aorta and other larger-diameter vessels are relatively easy to detect through gross anatomical examination. However, injuries or pathological changes in smaller or deeper vessels are difficult to detect through anatomical examination. Due to the unique nature of the brain, injuries or lesions to these small vessels are highly likely to be the cause of death, and traditional autopsies often fail to detect them. Therefore, angiography is also necessary to obtain vascular images to examine the condition of vascular branches or smaller vessels.

[0003] During in vivo contrast imaging, the contrast agent is injected into the body and distributed throughout the body via blood circulation while the heart is still functioning. After death, the heart stops beating, causing blood circulation to cease. At the same time, due to factors such as post-mortem coagulation and increased intracranial pressure, the contrast agent cannot be evenly distributed within the blood vessels during imaging. This results in problems such as missing segments of blood vessels and / or the entire blood vessel not being displayed in the image, which seriously affects the quality of the final image.

[0004] Under current technology, when performing cerebral angiography during an autopsy, contrast agents can only be manually injected using a syringe or injected under pressure using an infusion pump based on experience. If the injection pressure is too low, the amount of contrast agent injected will be insufficient, or even none in the deeper blood vessels, resulting in unclear or incomplete angiography. On the other hand, due to the different conditions of the corpses, the degree of decomposition and damage varies greatly. If the injection pressure is too high, it is easy to inject too much contrast agent, causing blood vessels in the corpse to rupture, which in turn leads to unclear vascular boundaries or even failure in angiography, increasing the difficulty and accuracy of obtaining autopsy conclusions. Utility Model Content

[0005] In view of the shortcomings of existing technologies that cannot flexibly control the perfusion volume and pressure of contrast agents, the technical problem to be solved by this utility model is to provide a cerebral artery pressurized perfusion device that facilitates the control of the perfusion volume and pressure of contrast agents.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A cerebral artery pressurized perfusion device includes an operating table, a reservoir, a first peristaltic pump, perfusion needles, a touch panel, and an electrical control box. The reservoir is placed on the upper surface of the bottom plate of the operating table. The first peristaltic pump is connected to the lower surface of the top plate of the operating table. The two perfusion needles and the first peristaltic pump are connected by a flexible tube with a three-way structure. The touch panel is detachably connected to the operating table. The electrical control box is fixedly connected to the upper surface of the bottom plate of the operating table. The first peristaltic pump is electrically connected to the electrical control box.

[0008] Furthermore, the upper surface of the operating platform base plate is also provided with a foot switch and a vacuum device, the vacuum device including a vacuum pump and a vacuum tank, and the foot switch and the vacuum device are connected to the electrical control box via cables.

[0009] Furthermore, a second peristaltic pump and a third peristaltic pump are also provided on the lower surface of the top plate of the operating table. The two ends of the second peristaltic pump are respectively connected to one of the infusion needles and the first negative pressure tank through hoses. The two ends of the third peristaltic pump are respectively connected to another infusion needle and the second negative pressure tank through hoses. The first negative pressure tank and the second negative pressure tank are placed on the upper surface of the bottom plate of the operating table. The second peristaltic pump and the third peristaltic pump are electrically connected to the electrical control box.

[0010] Furthermore, the operating table is equipped with a handrail on its side, a drain pipe on the side of the operating table away from the handrail, several U-shaped buckles on the top surface of the operating table, and a caster at each of the four corners of the bottom surface.

[0011] Furthermore, the infusion needle includes a needle handle and a needle tip. One end of the needle handle is connected to a tubing, and the other end is threaded to the needle tip. The side of the needle handle away from the tubing has a recess, and the center of the recess has a protrusion along the length direction. The protrusion has a thread along the circumference. The inner side of the recess of the needle handle contacts the outer side of the tail of the needle tip.

[0012] Furthermore, the caster is a swivel wheel with a foot brake.

[0013] Furthermore, the needle has an internal channel, a recess at the tail of the needle along the channel direction, a threaded inner wall of the recess, three frustum-shaped protrusions on the outside of the needle along the channel direction, a spindle-shaped top, and the internal channel is connected to two spindle-shaped openings on the side of the needle near the top of the needle.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1) The foot switch allows users to accurately control the timing and amount of contrast agent injection, avoiding situations where the injection volume is too small and the contrast is not obvious or the pressure is too high and the blood vessel ruptures. Compared with placing the injection controller on the needle handle, this device has a simple structure, is easy to operate, and has low requirements for the accuracy of the operation range.

[0016] 2) The four perfusion needles are responsible for injection and aspiration respectively, which improves the applicability of the equipment. Simultaneous perfusion and aspiration are beneficial to the reconstruction of blood circulation in the corpse.

[0017] 3) Each of the three peristaltic pumps is equipped with a pressure sensor near the infusion needle to facilitate real-time acquisition of intravascular pressure in the cadaver and prevent vascular rupture accidents.

[0018] 4) The vacuum device facilitates the removal of air bubbles contained in the prepared contrast solution, preventing air bubbles from interfering with the contrast results;

[0019] 5) Handrails and casters facilitate the movement of the equipment, and the foot brakes on the casters prevent the equipment from shifting due to accidental contact during operation, which would affect the posture of the injection needle;

[0020] 6) The detachable touch panel facilitates remote operation of the equipment for injection, reducing radiation damage;

[0021] 7) The negative pressure tank reduces the load on the peristaltic pump while preventing the extracted material from spreading to the outside, thus maintaining the cleanliness of the equipment and the surrounding environment;

[0022] 8) Several U-shaped buckles on the surface of the operating table facilitate the fixing of the hose and prevent the hose from swinging after being pressurized. The surface partition design facilitates the reasonable placement of items during operation, avoids additional contamination, and makes it easy to clean and maintain the equipment.

[0023] 9) The perfusion needle uses a threaded connection for easy needle replacement. The connection is double-sealed to prevent contrast fluid or aspirate from spilling out. The frustum-shaped protrusion enhances the needle's ability to remain in the blood vessel. The needle has a lateral opening. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a cross-sectional view of the injection needle of this utility model.

[0026] Among them, 1-operating table, 2-foot switch, 3-liquid storage tank, 4-first peristaltic pump, 5-vacuum device, 6-handrail, 7-infusion needle, 71-needle handle, 72-needle tip, 8-drain pipe, 9-touch panel, 10-second peristaltic pump, 11-third peristaltic pump, 12-first negative pressure tank, 13-second negative pressure tank, 14-electric control box, 15-casters. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model 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 this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "horizontal," "top," "side," "far," "near," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Example

[0031] See Figure 1 and Figure 2 The device includes an operating platform 1, a liquid storage tank 3, a first peristaltic pump 4, infusion needles 7, a touch panel 9, and an electrical control box 14. The liquid storage tank 3 is placed on the upper surface of the bottom plate of the operating platform 1. The first peristaltic pump 4 is connected to the lower surface of the top plate of the operating platform 1. The two infusion needles 7 and the first peristaltic pump 4 are connected by a flexible hose with a three-way structure. This hose extends from the first peristaltic pump 4 under the top plate of the operating platform 1, branches through the three-way structure, and extends through two curved protective tubes on the edge of the upper surface of the top plate of the operating platform 1 to the upper surface of the top plate of the operating platform 1, connecting to the two infusion needles 7. The touch panel 9 is detachably connected to the operating platform 1. After being detached, the touch panel 9 can remotely control all electrical components in the infusion equipment. The electrical control box 14 is fixedly connected to the upper surface of the bottom plate of the operating platform 1. The first peristaltic pump 4 is electrically connected to the electrical control box 14, and the electrical control box 14 contains a storage battery.

[0032] The upper surface of the base plate of the control panel 1 is also provided with a foot switch 2 and a vacuum device 5. The vacuum device 5 includes a vacuum pump and a vacuum tank. The foot switch 2 and the vacuum device 5 are connected to the electrical control box 14 via cables.

[0033] The lower surface of the top plate of the operating platform 1 is also provided with a second peristaltic pump 10 and a third peristaltic pump 11. The two ends of the second peristaltic pump 10 are respectively connected to one of the infusion needles 7 and the first negative pressure tank 12 through hoses. The two ends of the third peristaltic pump 11 are respectively connected to another infusion needle 7 and the second negative pressure tank 13 through hoses. The two hoses also pass upward through two curved protective tubes at the upper edge of the top surface of the operating platform 1. The first negative pressure tank 12 and the second negative pressure tank 13 are placed on the upper surface of the bottom plate of the operating platform 1. The second peristaltic pump 10 and the third peristaltic pump 11 are electrically connected to the electrical control box 14.

[0034] The operating platform 1 has a handrail 6 on one side and a drain pipe 8 on the side of the operating platform 1 away from the handrail 6. The top surface of the operating platform 1 is divided into three areas. The left side, where the injection needle 7 is placed, is the operating area. Each side of this area has a groove, and a curved protective tube is placed in the groove to prevent the hose from breaking and leaking. This also ensures that the height of the hose at the upper end of the protective tube is flush with the height of the hose placed on the top surface of the operating platform 1, reducing hose bending and improving hose life. The right side of the top surface of the operating platform 1 has a recessed contaminated area for temporarily placing waste and dirt generated during operation and an auxiliary equipment placement area at the same height as the operating area. The drain pipe 8 is connected to the contaminated area to facilitate the removal of waste liquid from cleaning the contaminated area. The top surface of the operating platform 1 has several U-shaped buckles to fix the hose behind the injection needle 7 when it is working. Each of the four corners of the bottom surface has a caster 15 with a foot brake and omnidirectional rotation function.

[0035] The infusion needle 7 includes a needle handle 71 and a needle tip 72. The side of the needle handle 71 is cylindrical, and a channel is provided inside the needle handle 71. One end of the needle handle 71 is connected to a flexible tube, and the other end is threaded to the needle tip 72. The side of the needle handle 71 away from the flexible tube has a recess, and a protrusion along the channel direction is provided in the center of the recess. The outer side of the protrusion is threaded circumferentially. The inner side of the recess of the needle handle 71 contacts the outer side of the tail of the needle tip 72.

[0036] The needle 72 has an internal channel that connects with the needle handle 71, and the two interfaces are in close contact. The tail of the needle 72 has a recess along the channel direction, and the inner wall of this recess is threaded. The outside of the needle 72 has three frustum-shaped protrusions along the channel direction. The top of the needle 72 is spindle-shaped; the spindle-shaped tip can pre-dilate blood vessels, preventing the subsequent frustum-shaped protrusions from directly contacting the blood vessel and causing it to rupture due to excessive instantaneous deformation. The internal channel near the top of the needle 72 connects to two fusiform openings on the side of the needle 72. These openings on the side of the needle 72 increase the upper limit of the injection or aspiration flow rate and are less prone to clogging.

[0037] When performing cerebral artery pressurization perfusion, surgical scissors placed in the auxiliary equipment placement area are used to make V-shaped incisions in both common carotid arteries of the cadaver's neck. Then, the needle tips 72 of the two perfusion needles 7 are inserted into the common carotid artery towards the head, and the blood vessels are clamped and fixed to the perfusion needles 7 using special plastic clamps for vascular connectors. Since intravenous injection is not required during cerebral artery perfusion, no additional perfusion needles are needed. The prepared contrast fluid is placed in the reservoir 3. The reservoir 3 is first placed in the vacuum chamber 5, and the touch panel 9 is used to remove any air bubbles mixed in. Then, the reservoir 3 is removed and connected to the lower hose of the first peristaltic pump 4 to supply contrast fluid to the two perfusion needles 7 connected to the first peristaltic pump 4. During the initial injection phase after puncture, since operating the touch panel 9 simultaneously is inconvenient, the foot switch 2 is placed under the feet for easy control of the first peristaltic pump 4. Once the injection is stable, operation can be performed solely using the touch panel 9. After arterial puncture, venous puncture is also required to allow blood in the vein to be drawn by the negative pressure bottle. This facilitates the establishment of postmortem circulation, improves contrast agent injection efficiency, and enhances contrast imaging. The second and third peristaltic pumps used to draw blood from the venous end are operated by the touch panel 9. When the arterial injection pressure or venous aspiration pressure exceeds the preset value of the pressure sensor, the touch panel 9 will display an alarm message. At this time, the device can be stopped with a single button press on the touch panel 9 to prevent damage to the postmortem's blood vessels.

[0038] Finally, it should be noted that the above embodiments are merely preferred embodiments of this utility model, and are only used to illustrate the technical solution of this utility model and not to limit it. Any modifications, improvements, or other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be included within the protection scope of this utility model.

Claims

1. A cerebral artery pressurized perfusion device, characterized in that: The device includes an operating table (1), a liquid storage tank (3), a first peristaltic pump (4), an infusion needle (7), a touch panel (9), and an electrical control box (14). The liquid storage tank (3) is placed on the upper surface of the bottom plate of the operating table (1). The first peristaltic pump (4) is connected to the lower surface of the top plate of the operating table (1). The two infusion needles (7) and the first peristaltic pump (4) are connected by a flexible hose with a three-way structure. The touch panel (9) is detachably connected to the operating table (1). The electrical control box (14) is fixedly connected to the upper surface of the bottom plate of the operating table (1). The first peristaltic pump (4) is electrically connected to the electrical control box (14).

2. The cerebral artery pressurized perfusion device as described in claim 1, characterized in that: The upper surface of the base plate of the operating table (1) is also provided with a foot switch (2) and a vacuum device (5). The vacuum device (5) includes a vacuum pump and a vacuum tank. The foot switch (2) and the vacuum device (5) are connected to the electrical control box (14) by cables.

3. The cerebral artery pressurization perfusion device as described in claim 1, characterized in that: The lower surface of the top plate of the operating table (1) is also provided with a second peristaltic pump (10) and a third peristaltic pump (11). The two ends of the second peristaltic pump (10) are respectively connected to one of the infusion needles (7) and the first negative pressure tank (12) through hoses. The two ends of the third peristaltic pump (11) are respectively connected to another infusion needle (7) and the second negative pressure tank (13) through hoses. The first negative pressure tank (12) and the second negative pressure tank (13) are placed on the upper surface of the bottom plate of the operating table (1). The second peristaltic pump (10) and the third peristaltic pump (11) are electrically connected to the electrical control box (14).

4. The cerebral artery pressurization perfusion device as described in claim 1, characterized in that: The operating table (1) has a handrail (6) on its side, and a drain pipe (8) on the side of the operating table (1) away from the handrail (6). The top surface of the operating table (1) has several U-shaped buckles, and each of the four corners of the bottom surface has a caster (15).

5. The cerebral artery pressurization perfusion device as described in claim 1, characterized in that: The infusion needle (7) includes a needle handle (71) and a needle tip (72). One end of the needle handle (71) is connected to a tubing, and the other end is threaded to the needle tip (72). The needle handle (71) has a recess on the side away from the tubing, and a protrusion along the length direction is provided in the center of the recess. The protrusion is threaded in the circumferential direction. The inner side of the recess of the needle handle (71) contacts the outer side of the tail of the needle tip (72).

6. The cerebral artery pressurization perfusion device as described in claim 4, characterized in that: The caster (15) is a swivel wheel with a foot brake.

7. The cerebral artery pressurization perfusion device as described in claim 5, characterized in that: The needle (72) has a channel inside, and the tail of the needle (72) has a recess along the channel direction. The inner wall of the recess is threaded. The needle (72) has three frustum-shaped protrusions along the channel direction on the outside. The top of the needle (72) is spindle-shaped. The end of the channel near the top of the needle (72) is connected to two spindle-shaped openings on the side of the needle (72).

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