Monitoring and early warning equipment for preventing extravasation of high-pressure radiography drugs

Abstract

The invention discloses monitoring and early warning equipment for preventing extravasation of a high-pressure radiography drug, which comprises an extravasation monitoring and alarming assembly, and the extravasation monitoring and alarming assembly comprises a transparent connecting soft plate which is arranged near a main body cylinder or an injection needle and is used for being attached to the skin of an injection part of a patient, a contrast agent in the first medicine cylinder is firstly pushed out, normal saline in the second medicine cylinder is then pushed and injected into the blood vessel of a patient, the contrast agent and the normal saline are alternately injected into the blood vessel, normal saline flushing is beneficial to reducing the concentration of the local contrast agent, and the risk of blood vessel stimulation and exosmosis is reduced; if leakage occurs, tissues around the injection site swell, the injection site swells, the pressure sensor detects that the pressure of the injection site is increased, the pressure sensor transmits a detected signal to the alarm, the alarm gives out an alarm sound, at the moment, medical personnel stop injection, and the safety of a patient is ensured.

Description

Technical Field

[0001] This invention relates to the field of medical monitoring technology, and more specifically, to a monitoring and early warning device for preventing extravasation of high-pressure contrast drugs. Background Technology

[0002] In medical imaging examinations (such as CT, MRI, and DSA), high-pressure injection is often used to rapidly inject contrast agents into the patient's blood vessels to enhance imaging. However, this technique has a significant technical problem: during high-pressure injection, due to factors such as abnormal vascular access or equipment displacement, the contrast agent may leak from the blood vessel into the surrounding tissue (extravasation).

[0003] Contrast agent extravasation not only reduces image quality and affects diagnostic accuracy, but can also cause local tissue damage, and in severe cases, even irreversible damage. Currently, clinical practice mainly relies on manual observation by medical staff to identify extravasation, lacking real-time, automated monitoring methods, which often leads to delayed intervention. Furthermore, traditional high-pressure injection devices typically only have basic injection functions; the continuous injection of contrast agent into the blood vessel results in excessively high local concentrations of contrast agent, irritating the blood vessel and increasing the risk of extravasation. Summary of the Invention

[0004] This invention addresses the technical problems existing in the prior art by providing a monitoring and early warning device for preventing extravasation of contrast agents. Extravasation not only reduces image quality and affects diagnostic accuracy, but can also cause local tissue damage, and in severe cases, irreversible damage. Currently, clinical practice mainly relies on manual observation by medical staff to identify extravasation, lacking real-time, automated monitoring methods, leading to often delayed intervention. Furthermore, traditional high-pressure injection devices typically only have basic injection functions; the continuous injection of contrast agent into the blood vessel results in excessively high local concentrations of contrast agent, irritating the blood vessel and increasing the risk of extravasation.

[0005] To achieve the above objectives, the present invention provides a monitoring and early warning device for preventing extravasation of high-pressure contrast agents, comprising a main body and a mounting head installed at one end of the main body, wherein a needle injection needle is fixedly connected to the mounting head.

[0006] The main body of the cylinder contains a first cartridge for containing contrast agent and a second cartridge for containing physiological saline, arranged side by side.

[0007] Both the first and second cartridges are equipped with movable pistons. The pistons are connected to piston rods, the piston rods are connected to connecting plates, and the connecting plates are connected to fixing blocks.

[0008] The main body is equipped with an alternating drive mechanism, which is used to alternately drive the two piston rods to move, so as to alternately push the contrast agent in the first cartridge and the saline in the second cartridge to be discharged and injected into the patient's blood vessels through the injection needle.

[0009] Preferably, the alternating drive mechanism includes a telescopic cylinder and a vertical block groove. The telescopic cylinder is fixedly installed on the inner wall of the main body. A connecting block is fixedly connected to the telescopic end of the telescopic cylinder. The connecting block has a circular hole, and a circular rod is installed in the circular hole. A drive gear is fixedly connected to one end of the circular rod placed in the vertical block groove. A rack is fixedly connected to the inner wall of the vertical block groove. The drive gear meshes with the rack. A mounting box is connected to the end of the circular rod away from the vertical block groove. Two arm plates are symmetrically arranged on the mounting box. A pressure roller is rotatably connected to each arm plate. A transmission assembly is provided in the mounting box to transmit the rotational motion of the circular rod to the two arm plates to drive the two pressure rollers to alternately press down on the fixed block.

[0010] Preferably, the transmission assembly includes a first gear and two second gears. The first gear is fixedly connected to a round rod and meshes with the two second gears. A rotating rod is fixedly inserted at the center of each of the two second gears. Both rotating rods penetrate the side wall of the mounting box. Both arm plates are fixedly connected to the rotating rods. A pressure wheel is rotatably connected to both connecting arm plates.

[0011] Preferably, the device further includes an extravasation monitoring and alarm component, the extravasation monitoring and alarm component comprising:

[0012] A transparent connecting soft plate is disposed near the main body or the injection needle and is used to attach to the skin of the patient's injection site.

[0013] A mounting shell is fixedly installed on the transparent connecting flexible plate;

[0014] A mounting plate is installed on the side of the transparent connecting plate facing the skin;

[0015] A pressure sensor for pressure changes at the injection site, mounted on the mounting plate;

[0016] An alarm connected to the pressure sensor signal, used to issue an alarm when the pressure exceeds a threshold.

[0017] Preferably, a first circular plate is fixedly connected to the main body cylinder. The first circular plate has two positioning holes. The first and second cartridges pass through the two positioning holes. Two connecting rods are provided on the mounting head. The upper ends of the two connecting rods are fixedly connected to the second circular plate. The first and second cartridges are fixedly connected to the second circular plate.

[0018] Preferably, the second circular plate has a central circular opening, and the first and second cartridges are provided with liquid outlet pipes, each of which passes through the central circular opening. The mounting head is provided with a liquid-passing circular block, and the liquid-passing circular block is symmetrically provided with Y-shaped channels. The lower end of each liquid outlet pipe is located in one of the two upper ports of the Y-shaped channel.

[0019] Preferably, a first elastic band and a second elastic band are fixedly connected to the transparent connecting flexible plate to fix the extravasation monitoring alarm component to the patient's skin surface.

[0020] Preferably, the vertical block groove is fixedly connected to two mounting rods, one end of the two mounting rods opposite to the vertical block groove is fixedly connected to the inner wall of the main body, and two L-shaped rods are symmetrically fixedly connected to the connecting block, one end of the two L-shaped rods opposite to the connecting block is fixedly connected to the mounting box.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. By activating the telescopic cylinder, the telescopic end of the cylinder drives the connecting block to move downward. The connecting block drives the drive gear to move downward via a round rod. When the drive gear moves downward, it rotates under the action of the rack. The drive gear drives the first gear to rotate via the round rod. The first gear drives the two second gears to rotate. Both second gears drive the arm plate and the lower pressure wheel to rotate via a rotating rod. The two arm plates and the lower pressure wheel rotate alternately to the lower end, so that the contrast agent and saline in the first and second cartridges are pushed out alternately. The contrast agent in the first cartridge is pushed out first, and then the saline in the second cartridge is pushed into the patient's blood vessels. The contrast agent and saline are injected into the blood vessels alternately. The saline flushing helps to reduce the local contrast agent concentration, reduce vascular irritation and the risk of extravasation.

[0023] 2. If leakage occurs, the tissue around the injection site will swell and the injection site will bulge. The pressure sensor will detect the increased pressure at the injection site and transmit the detected signal to the alarm. The alarm will then sound. At this time, medical personnel should stop the injection to ensure the patient's safety. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the transparent connecting flexible plate in this invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the main cylinder in this invention;

[0027] Figure 4This is a schematic diagram of the alternating drive mechanism structure in this invention;

[0028] Figure 5 This is a cross-sectional view of the vertical block groove in this invention;

[0029] Figure 6 In this invention Figure 5 Enlarged view of point A;

[0030] Figure 7 This is a schematic diagram of the transmission component in this invention;

[0031] Figure 8 This is a schematic diagram of the alarm structure in this invention;

[0032] Figure 9 This is a cross-sectional view of the liquid-passing circular block in this invention.

[0033] The meanings of the labels in the diagram are as follows:

[0034] 1. Main body; 101. First circular plate; 2. Mounting head; 201. Needle; 202. Second circular plate; 3. Transparent connecting flexible plate; 301. Mounting shell; 302. Mounting flexible plate; 303. Pressure sensor; 304. Alarm; 401. First elastic band; 402. Second elastic band; 501. Telescopic cylinder; 502. Connecting block; 502-1. L-shaped rod; 503. Round rod; 504. Vertical... Block tank; 504-1, mounting rod; 505, drive gear; 506, rack; 507, mounting box; 508-1, first gear; 508-2, second gear; 508-3, rotating rod; 509, arm plate; 510, lower pressure wheel; 601, first cartridge case; 602, second cartridge case; 603, piston rod; 604, connecting plate; 605, fixing block; 606, liquid outlet pipe; 607, liquid passage block. Detailed Implementation

[0035] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Implementation 1

[0037] Please see Figure 1 , Figure 2 and Figure 8This embodiment provides a monitoring and early warning device for preventing extravasation of high-pressure contrast agents, including an extravasation monitoring and alarm component. Considering that leakage may occur during contrast agent injection, causing swelling of the tissue around the injection site and bulging of the injection site, the extravasation monitoring and alarm component includes: a transparent connecting flexible plate 3 disposed near the main body 1 or the injection needle 201 for attaching to the patient's skin at the injection site; a mounting shell 301 fixed on the transparent connecting flexible plate 3; a mounting flexible plate 302 disposed on the side of the transparent connecting flexible plate 3 facing the skin; a pressure sensor 303 disposed on the mounting flexible plate 302 for pressure changes at the injection site; and an alarm 304 connected to the pressure sensor 303 for issuing an alarm when the detected pressure exceeds a threshold.

[0038] In summary, the improvement of this embodiment lies in:

[0039] If leakage occurs, the tissue around the injection site will swell and the injection site will bulge. The pressure sensor 303 will detect the increased pressure at the injection site and transmit the signal detected by the pressure sensor 303 to the alarm 304. The alarm 304 will then sound an alarm. At this time, the medical personnel will stop the injection to ensure the patient's safety.

[0040] Based on the above, other structures also need to be disclosed in detail, such as:

[0041] Please see Figure 1 , Figure 2 and Figure 8 In order to fix the extravasation monitoring alarm component, a first elastic band 401 and a second elastic band 402 are symmetrically fixedly connected on the transparent connecting flexible plate 3. Medical staff use male and female Velcro straps on the second elastic band 402 to tie the first elastic band 401 and the second elastic band 402 to the patient's arm, thereby fixing the extravasation monitoring alarm component to the patient's skin surface.

[0042] Example 2

[0043] Please refer to the figure. Figures 1-9This embodiment provides a monitoring and early warning device for preventing extravasation of contrast agents in high-pressure injection systems. It includes a main body 1 and an mounting head 2 installed at one end of the main body 1. A needle 201 is fixedly connected to the mounting head 2. Considering that traditional high-pressure injection devices typically only have basic injection functions, the continuous injection of contrast agent into the blood vessel can lead to excessively high local concentrations of contrast agent, irritating the blood vessel and increasing the risk of extravasation. Furthermore, the identification of extravasation relies on the experience and visual observation of medical personnel, lacking real-time and automated monitoring. Monitoring methods often fail to detect the problem until significant swelling or patient complaints of pain occur, delaying intervention. The main body 1 contains two parallel cartridges: a first cartridge 601 for containing contrast agent and a second cartridge 602 for containing normal saline. Both cartridges 601 and 602 contain movable pistons, connected to piston rods 603, which in turn are connected to connecting plates 604, and fixed blocks 605. The main body 1 also contains an alternating drive mechanism for alternately driving the two cartridges. The plunger 603 moves to alternately push the contrast agent in cartridge 601 and the saline solution in cartridge 602 out, which are then injected into the patient's blood vessels through the injection needle 201. The alternating drive mechanism includes a telescopic cylinder 501 and a vertical block groove 504. The telescopic cylinder 501 is fixedly installed on the inner wall of the main body 1. A connecting block 502 is fixedly connected to the telescopic end of the telescopic cylinder 501. The connecting block 502 has a circular hole, and a circular rod 503 is placed in the circular hole. The circular rod 503 is placed at one end of the vertical block groove 504 and fixedly connected to a drive mechanism. A drive gear 505 is fixedly connected to a rack 506 on the inner wall of the vertical block groove 504. The drive gear 505 meshes with the rack 506. A mounting box 507 is connected to one end of the round rod 503 away from the vertical block groove 504. Two arm plates 509 are symmetrically arranged on the mounting box 507. A pressure roller 510 is rotatably connected to each arm plate 509. A transmission assembly is provided inside the mounting box 507 to transmit the rotational motion of the round rod 503 to the two arm plates 509, so as to drive the two pressure rollers 510 to alternately press down on the fixed block 605.

[0044] In summary, the improvement of this embodiment lies in:

[0045] By activating the telescopic cylinder 501, the telescopic end of the cylinder 501 drives the connecting block 502 to move downward. The connecting block 502 drives the drive gear 505 to move downward via the round rod 503. When the drive gear 505 moves downward, it rotates under the action of the rack 506. The drive gear 505 drives the round rod 503 to rotate. The round rod 503 drives the arm plate 509 and the pressure roller 510 to rotate via the transmission assembly. The two arm plates 509 and the pressure roller 510 rotate alternately to the lower end, so that the contrast agent and saline in the first cartridge 601 and the second cartridge 602 are alternately pushed out. The contrast agent in the first cartridge 601 is pushed out first, and then the saline in the second cartridge 602 is pushed into the patient's blood vessels. The contrast agent and saline are alternately injected into the blood vessels. The saline flushing helps to reduce the local contrast agent concentration, reduce vascular irritation and the risk of extravasation.

[0046] Based on the above, other structures also need to be disclosed in detail, such as:

[0047] Please see Figure 6 Considering the need to drive the two transmission components, connecting arm plate 509 and pressure roller 510, to rotate synchronously, a first gear 508-1 and two second gears 508-2 are included. The first gear 508-1 is fixedly connected to the round rod 503. The first gear 508-1 meshes with the two second gears 508-2. A rotating rod 508-3 is fixedly inserted at the center of each of the two second gears 508-2. Both rotating rods 508-3 penetrate the side wall of the mounting box 507. Both arm plates 509 are fixedly connected to the rotating rods 508-3. The pressure roller 510 is rotatably connected to the round rod 503 on both connecting arm plates 509. The round rod 503 drives the first gear 508-1 to rotate. The first gear 508-1 drives the two second gears 508-2 to rotate. Both second gears 508-2 drive the two arm plates 509 and the two pressure rollers 510, which are initially 180 degrees out of phase, to rotate synchronously through the rotating rods 508-3.

[0048] Please see Figure 2 and Figure 8Considering the need to install cartridge 601 and cartridge 602, a circular plate 101 is fixedly connected to the main body 1. The circular plate 101 has two positioning openings through which cartridges 601 and 602 pass. Two connecting rods are provided on the mounting head 2, and the upper ends of the two connecting rods are fixedly connected to a circular plate 202. Cartridges 601 and 602 are fixedly connected to the circular plate 202, which has a central opening. The device 2 is equipped with a liquid outlet tube 606, each of which passes through the central circular opening. The device 2 is equipped with a liquid-passing circular block 607, which has symmetrically opened Y-shaped channels. The lower end of each liquid outlet tube 606 is set in the two upper ports of the Y-shaped channel. The first cartridge 601 and the second cartridge 602 pass through the two positioning circular openings and abut against the second circular plate 202, with their positions relatively fixed. The contrast agent and saline in the first cartridge 601 and the second cartridge 602 are injected into the Y-shaped channel through the liquid outlet tube 606, and finally injected into the blood vessel through the needle 201.

[0049] Please see Figure 2 In order to install the vertical block groove 504 and the mounting box 507, two mounting rods 504-1 are fixedly connected to the vertical block groove 504. The ends of the two mounting rods 504-1 away from the vertical block groove 504 are fixedly connected to the inner wall of the main body cylinder 1. Two L-shaped rods 502-1 are symmetrically fixedly connected to the connecting block 502. The ends of the two L-shaped rods 502-1 away from the connecting block 502 are fixedly connected to the mounting box 507. The mounting rods 504-1 fix the vertical block groove 504, and the L-shaped rods 502-1 are relatively fixed in position to the mounting box 507.

[0050] In summary, the steps of this solution are as follows:

[0051] S1: Elastic band 401 and elastic band 402 are tied around the patient's arm, and needle 201 is inserted into the blood vessel for injection.

[0052] S2: Start the telescopic cylinder 501. The telescopic end of the telescopic cylinder 501 drives the connecting block 502 to move downward. The connecting block 502 drives the drive gear 505 to move downward through the round rod 503. When the drive gear 505 moves downward, it rotates under the action of the rack 506. The drive gear 505 drives the first gear 508-1 to rotate through the round rod 503. The first gear 508-1 drives the two second gears 508-2 to rotate. The two second gears 508-2 drive the arm plate 509 and the lower pressure wheel 510 to rotate through the rotating rod 508-3.

[0053] S3: When the pressure roller 510 rotates to the lower end, it pushes down the connecting plate 604, the fixing block 605, and the piston rod 603. When the two pressure rollers 510 rotate alternately to the lower end, the contrast agent and saline in the first cartridge 601 and the second cartridge 602 are pushed out alternately. The contrast agent in the first cartridge 601 is pushed out first and injected into the patient's blood vessels through the outlet tube 606, the Y-shaped channel in the fluid passage block 607, and the needle 201. At this time, the contrast agent concentration in the blood vessels reaches its peak in a short time, thus clearly outlining the vascular structures such as arteries and veins. When the right pressure roller 510 rotates to the lower end, the saline in the second cartridge 602 is pushed into the patient's blood vessels. The contrast agent and saline are injected into the blood vessels alternately. The saline flushing helps to reduce the local contrast agent concentration, reduce vascular irritation, and reduce the risk of extravasation.

[0054] S4: If leakage occurs, the tissue around the injection site will swell and the injection site will bulge. The pressure sensor 303 will detect the increased pressure at the injection site and transmit the signal detected by the pressure sensor 303 to the alarm 304. The alarm 304 will sound an alarm. At this time, the medical personnel will stop the injection to ensure the patient's safety.

[0055] S5: After the contrast agent in cartridge 1 601 and the saline in cartridge 2 602 are injected, remove the mounting head 2 from the main body 1, and then remove cartridge 1 601 and cartridge 2 602 from the first circular plate 101. The mounting head 2, needle 201, cartridge 1 601 and cartridge 2 602 can be replaced.

[0056] It is worth noting that the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring and early warning device for preventing extravasation of high-pressure contrast drugs, comprising a main body (1) and an installation head (2) installed at one end of the main body (1), wherein a needle (201) is fixedly connected to the installation head (2), characterized in that: The main body (1) contains a first cartridge (601) for containing contrast agent and a second cartridge (602) for containing physiological saline, arranged in parallel. Both the first cartridge (601) and the second cartridge (602) are equipped with movable pistons. The pistons are connected to piston rods (603), the piston rods (603) are connected to connecting plates (604), and the connecting plates (604) are connected to fixing blocks (605). The main body (1) is provided with an alternating drive mechanism for alternatingly driving the two piston rods (603) to move, so as to alternately push the contrast agent in the first cartridge (601) and the saline in the second cartridge (602) to be discharged and injected into the patient's blood vessels through the injection needle (201).

2. The monitoring and early warning device for preventing extravasation of high-pressure contrast drugs according to claim 1, characterized in that: The alternating drive mechanism includes a telescopic cylinder (501) and a vertical block groove (504). The telescopic cylinder (501) is fixedly installed on the inner wall of the main body (1). A connecting block (502) is fixedly connected to the telescopic end of the telescopic cylinder (501). The connecting block (502) has a circular hole, and a circular rod (503) is installed in the circular hole. A drive gear (505) is fixedly connected to one end of the circular rod (503) placed in the vertical block groove (504). A rack (506) is fixedly connected to the inner wall of the vertical block groove (504). The drive gear (505) meshes with the rack (506). The end of the round rod (503) away from the vertical block groove (504) is connected to a mounting box (507). Two arm plates (509) are symmetrically arranged on the mounting box (507). Each arm plate (509) is rotatably connected to a pressure wheel (510). The mounting box (507) is equipped with a transmission assembly to transmit the rotational motion of the round rod (503) to the two arm plates (509) so as to drive the two pressure wheels (510) to alternately press down on the fixed block (605).

3. The monitoring and early warning device for preventing extravasation of high-pressure contrast drugs according to claim 2, characterized in that: The transmission assembly includes a first gear (508-1) and two second gears (508-2). The first gear (508-1) is fixedly connected to a round rod (503). The first gear (508-1) meshes with the two second gears (508-2). A rotating rod (508-3) is fixedly inserted at the center of each of the two second gears (508-2). Both rotating rods (508-3) penetrate the side wall of the mounting box (507). Both arm plates (509) are fixedly connected to the rotating rods (508-3). A lower pressure wheel (510) is rotatably connected to both connecting arm plates (509).

4. The monitoring and early warning device for preventing extravasation of high-pressure contrast drugs according to claim 1, characterized in that: The device also includes an extravasation monitoring and alarm component, which includes: A transparent connecting soft plate (3) is set near the main body (1) or the injection needle (201) for attaching to the skin of the patient's injection site; A mounting shell (301) is fixedly provided on the transparent connecting flexible plate (3); A mounting plate (302) is installed on the side of the transparent connecting plate (3) facing the skin; A pressure sensor (303) for pressure changes at the injection site is mounted on the mounting plate (302); An alarm (304) is connected to the pressure sensor (303) and is used to issue an alarm when the pressure exceeds a threshold.

5. The monitoring and early warning device for preventing extravasation of high-pressure contrast drugs according to claim 1, characterized in that: A first circular plate (101) is fixedly connected in the main body (1). The first circular plate (101) has two positioning holes. The first cartridge (601) and the second cartridge (602) pass through the two positioning holes. Two connecting rods are provided on the mounting head (2). The upper ends of the two connecting rods are fixedly connected to the second circular plate (202). The first cartridge (601) and the second cartridge (602) are fixedly connected to the second circular plate (202).

6. The monitoring and early warning device for preventing extravasation of high-pressure contrast drugs according to claim 5, characterized in that: The second circular plate (202) has a central circular opening. The first cartridge (601) and the second cartridge (602) are provided with liquid outlet pipes (606). Each liquid outlet pipe (606) passes through the central circular opening. The mounting head (2) is provided with a liquid-passing circular block (607). The liquid-passing circular block (607) is symmetrically provided with Y-shaped channels. The lower end of each liquid outlet pipe (606) is provided in the two upper ports of the Y-shaped channels.

7. The monitoring and early warning device for preventing extravasation of high-pressure contrast drugs according to claim 4, characterized in that: The transparent connecting flexible plate (3) is fixedly connected with a first elastic band (401) and a second elastic band (402) for fixing the extravasation monitoring alarm component to the patient's skin surface.

8. The monitoring and early warning device for preventing extravasation of high-pressure contrast drugs according to claim 2, characterized in that: The vertical block groove (504) is fixedly connected to two mounting rods (504-1). The ends of the two mounting rods (504-1) opposite to the vertical block groove (504) are fixedly connected to the inner wall of the main body cylinder (1). The connecting block (502) is symmetrically fixedly connected to two L-shaped rods (502-1). The ends of the two L-shaped rods (502-1) opposite to the connecting block (502) are fixedly connected to the mounting box (507).

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