A kind of automatic constant temperature mixing defoaming and air blocking device before contrast agent injection

Abstract

This utility model discloses an automatic constant-temperature mixing, defoaming, and air-isolation device for contrast agents before injection, relating to the field of medical equipment technology. The device includes a base and a mixing disc mounted on the base. The mixing disc has several defoaming storage mechanisms, each comprising: an outer shell; an inner cylinder for storing the contrast agent inside the outer shell; a gap between the outer shell and the inner cylinder; and microencapsulated alkane filling the gap. The bottom of the inner cylinder has a stirring structure for centrifugal mixing of the contrast agent. This utility model, through the combined action of a phase-change heat storage layer and a heating ring, maintains a constant temperature for the contrast agent throughout the mixing, defoaming, and pre-use processes, significantly reducing viscosity fluctuations and injection resistance. Centrifugal stirring and the hydrophilic membrane on the sidewall work together to efficiently collect and expel air bubbles. The exhaust path has no through holes, eliminating the risk of liquid spillage.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to an automatic constant temperature mixing and defoaming device and air isolation device before contrast agent injection. Background Technology

[0002] Contrast agents are chemical preparations used in medical imaging examinations. They are mainly introduced into the human body through oral administration, injection, or perfusion. They utilize their special physical properties (such as high atomic number, high density, or magnetism) to enhance the contrast between specific tissues, organs, or lesion areas and surrounding structures. This helps doctors to observe anatomical details or pathological changes that were previously difficult to distinguish more clearly under imaging equipment such as X-rays, CT, MRI, or ultrasound, thereby improving the accuracy and sensitivity of disease diagnosis. They are widely used in the examination of diseases of multiple systems, including cardiovascular, cerebrovascular, urinary, and digestive diseases.

[0003] Contrast agents must be mixed before injection to eliminate concentration stratification caused by prolonged standing; however, air is inevitably entrained during mixing, and the violent shearing between liquid and air forms a large number of tiny bubbles; these bubbles enter the blood vessels with the liquid flow, which can instantly block blood flow signals, causing imaging artifacts, and in more serious cases, causing air embolism, directly endangering the patient's life; existing devices mostly rely on vacuum degassing or simple static air venting, which is time-consuming, noisy, and fails when power is cut off, making them unsuitable for emergency and high-volume examinations; at the same time, air is often drawn in during the final aspiration due to the sudden drop in liquid level, and the lack of immediate mechanical cutoff allows bubbles to easily reach the tip of the syringe. Utility Model Content

[0004] This invention provides an automatic constant temperature mixing, defoaming, and air isolation device before contrast agent injection. It has the advantages of constant temperature maintenance, centrifugal mixing, side wall venting, and mechanical air isolation, so as to solve the problems of bubbles being difficult to remove in time during the mixing process, air being easily drawn in during the final stage of suction, and lack of reliable cutoff when power is cut off or the liquid column is lost.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic constant-temperature mixing, defoaming, and air-blocking device before contrast agent injection, comprising a base and a mixing disc disposed on the base, wherein the mixing disc is provided with a plurality of defoaming storage mechanisms, the defoaming storage mechanisms comprising:

[0006] The outer shell has an inner cylinder for storing contrast agent inside, and a gap is left between the outer shell and the inner cylinder. The gap is filled with microencapsulated alkane, and the bottom of the inner cylinder is provided with a stirring structure for rotating to achieve centrifugal mixing of the contrast agent.

[0007] A hydrophilic membrane is attached to the bottom side wall of the inner cylinder. The hydrophilic membrane and the exhaust structure provided on the inner cylinder together form an exhaust channel for discharging the gas in the inner cylinder to the gap and communicating with the outside through the top edge of the outer shell.

[0008] An air isolation valve is disposed on the bottom outer wall of the housing, and its cavity is connected to the liquid outlet of the inner cylinder. It is used to close the channel when the liquid is lost and open the channel when the liquid is present.

[0009] As a preferred embodiment of this utility model, a top cover is rotatably connected to one side of the mixing disc, and a fastener for fixing the mixing disc and the top cover is provided between them.

[0010] As a preferred technical solution of this utility model, the mixing disk has a plurality of placement holes arranged in a ring array, and each placement hole has an electric heating ring on its inner wall. The top cover is provided with a rubber sealing ring to match each placement hole.

[0011] As a preferred embodiment of this utility model, the outer shell and the inner cylinder are arranged in an inverted cone shape, and the hydrophilic membrane is disposed on the bottom side wall of the inner cylinder at the converging part.

[0012] As a preferred embodiment of this utility model, the exhaust structure includes:

[0013] A cover ring, which covers the outer wall of the inner cylinder at the hydrophilic membrane portion;

[0014] The exhaust pipes are arranged in a ring array, and one end of each exhaust pipe is connected to the cavity of the cover ring. The exhaust pipes are placed in the gap between the outer shell and the inner cylinder, and one end of the exhaust pipe is located at the top of the outer shell.

[0015] As a preferred embodiment of this utility model, a rubber plug is provided at the top of the inner cylinder, and the diameter of the rubber plug is smaller than the diameter formed by the top ends of the plurality of exhaust pipes.

[0016] As a preferred embodiment of this utility model, the air isolation valve includes:

[0017] A horizontal tube, which is connected to the inner cylinder, has a vertically installed vertical pipe at one end;

[0018] A drain pipe is horizontally arranged on the riser and is connected to the horizontal pipe through the riser.

[0019] As a preferred embodiment of this utility model, the air isolation valve further includes:

[0020] An abutment ring is fixed to the inner wall of the riser, and a through hole is provided in the center of the abutment ring;

[0021] A float is adapted to abut against the through hole. The float is disposed in the cavity of the riser. A spring is fixedly connected to the float, and the other end of the spring is fixedly connected to the top of the cavity of the riser.

[0022] As a preferred embodiment of this utility model, the stirring structure includes:

[0023] A rotating column that rotates at the bottom of the inner cylinder;

[0024] A stirring paddle is fixed to the top of the rotating column, and the horizontal height of the stirring paddle is parallel to the center of the hydrophilic membrane. Both the stirring paddle and the rotating column contain magnetic particles.

[0025] Compared with the prior art, this utility model provides an automatic constant temperature mixing, defoaming and air isolation device before contrast agent injection, which has the following beneficial effects:

[0026] 1. The automatic constant temperature mixing, defoaming and air isolation device for contrast agent before injection, through the combined action of phase change heat storage layer and electric heating ring, keeps the contrast agent at a constant temperature throughout the mixing, defoaming and waiting process, significantly reducing viscosity fluctuations and injection resistance. Centrifugal stirring and the hydrophilic film on the side wall work together to efficiently gather and discharge bubbles. There are no through holes in the exhaust path, so there is no risk of liquid overflow.

[0027] 2. The automatic constant temperature mixing and defoaming device and air isolation device for contrast agent injection is equipped with an air isolation valve that closes immediately when the liquid column is lost and automatically opens after recovery, forming a purely mechanical air isolation to prevent air from entering the downstream pipeline and improve injection safety. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a structural schematic diagram of the present invention in another state.

[0030] Figure 3 This is a schematic diagram of the structure of the base of this utility model;

[0031] Figure 4 This is a schematic diagram of the defoaming storage mechanism of this utility model;

[0032] Figure 5 This is a cross-sectional structural diagram of the defoaming storage mechanism of this utility model;

[0033] Figure 6This is a schematic diagram showing the disassembled structure of the defoaming storage mechanism of this utility model;

[0034] Figure 7 This is a schematic diagram of the inner cylinder of this utility model;

[0035] Figure 8 This is a schematic diagram of the exhaust structure of this utility model;

[0036] Figure 9 This is a schematic diagram of the stirring structure of this utility model;

[0037] Figure 10 This is a schematic diagram of the air isolation valve of this utility model.

[0038] In the diagram: 1. Base; 2. Mixing disc; 3. Placement hole; 4. Heating ring; 5. Top cover; 6. Sealing ring; 7. Outer shell; 8. Inner cylinder; 9. Rubber stopper; 10. Exhaust pipe; 11. Cover ring; 12. Hydrophilic membrane; 13. Stirring paddle; 14. Rotating column; 15. Drain pipe; 16. Vertical pipe; 17. Horizontal pipe; 18. Contact ring; 19. Float; 20. Spring. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Please see Figures 1-10 This utility model discloses an automatic constant-temperature mixing, defoaming, and air-blocking device for contrast agent injection, including a base 1 and a mixing disk 2 disposed on the base 1. The mixing disk 2 is provided with a plurality of defoaming storage mechanisms, the defoaming storage mechanisms including:

[0041] The outer shell 7 has an inner cylinder 8 for storing contrast agent inside. A gap is left between the outer shell 7 and the inner cylinder 8. The gap is filled with microencapsulated alkane. The bottom of the inner cylinder 8 is provided with a stirring structure for rotating to achieve centrifugal mixing of the contrast agent.

[0042] A hydrophilic membrane 12 is attached to the bottom side wall of the inner cylinder 8. The hydrophilic membrane 12 and the exhaust structure provided on the inner cylinder 8 together form an exhaust channel for discharging the gas in the inner cylinder 8 to the gap and communicating with the outside through the top edge of the outer shell 7.

[0043] An air isolation valve is provided on the bottom outer wall of the housing 7, and its cavity is connected to the liquid outlet of the inner cylinder 8. It is used to close the channel when the liquid is lost and open the channel when the liquid is present.

[0044] In this embodiment, the gap between the outer shell 7 and the inner cylinder 8 is completely filled with microencapsulated alkanes, forming a phase change heat storage layer surrounding the inner cylinder 8. The phase change heat storage layer absorbs heat and melts, and slowly solidifies and releases heat when power is cut off or during a short-term shutdown, so that the temperature of the contrast agent in the inner cylinder 8 is stabilized within a set range. With the help of the bottom rotating stirring structure, the contrast agent forms an outward rising liquid flow under centrifugal force, while pushing bubbles with a density much lower than that of liquid towards the central axis area of ​​the inner cylinder 8. The hydrophilic membrane 12 is directly opposite this airflow aggregation zone, and the bubbles can directly reach the membrane surface and pass through the membrane wall into the exhaust structure, and finally be discharged to the outside from the top edge of the outer shell 7. The entire exhaust path has no additional through holes, and the liquid is blocked by the membrane wall and will not overflow. The air isolation valve can prevent air from entering the downstream. After the liquid column is restored, the channel reopens, thereby realizing the function of unobstructed flow when liquid is present and closed when liquid is lost. An exhaust device is provided on the base 1 to suck away the discharged gas and ensure that the contrast agent inside the inner cylinder 8 is kept air-isolated.

[0045] Please see Figures 1-3 As a preferred technical solution of this utility model, a top cover 5 is rotatably connected to one side of the mixing disk 2, and a fastener for fixing the mixing disk 2 and the top cover 5 is provided between them.

[0046] The mixing disk 2 has a plurality of placement holes 3 arranged in a ring array. Each placement hole 3 has an electric heating ring 4 on its inner wall. The top cover 5 is provided with a rubber sealing ring 6 to match each placement hole 3.

[0047] In this embodiment, the top cover 5 is hinged upward around the edge of the mixing disk 2, and the latch and the lock seat are respectively fixed to the outer peripheral wall of the mixing disk 2 and the corresponding edge of the top cover 5. When closed, the latch is embedded in the lock seat, forming a rigid connection that can be repeatedly opened and closed, so as to prevent the top cover 5 from being accidentally opened during transportation or vibration.

[0048] The heating ring 4 is attached to the inner wall of the placement hole 3 and connected to the temperature control circuit in the base 1. After being powered on, it continuously supplies heat to the outer wall of the outer casing 7. When the top cover 5 is closed, the sealing ring 6 is pressed against the end face of the placement hole 3 to form an elastic seal, reducing heat loss and external contamination intrusion.

[0049] Please see Figures 1-10 As a preferred technical solution of this utility model, the outer shell 7 and the inner cylinder 8 are arranged in an inverted cone shape, and the hydrophilic membrane 12 is disposed on the bottom side wall of the inner cylinder 8 at the converging part.

[0050] In this embodiment, the inverted conical outer shell 7 and inner cylinder 8 gradually converge downwards from the middle, so that the liquid surface still maintains sufficient flow rate and radial space when it is at a low position. The hydrophilic membrane 12 is attached to the side wall of the narrowest part of the converging section of the inner cylinder 8, facing the centrifugally aggregated bubble layer, shortening the bubble migration path and improving the exhaust efficiency.

[0051] Please see Figures 1-8 As a preferred embodiment of this utility model, the exhaust structure includes:

[0052] A cover ring 11 is provided on the outer wall of the inner cylinder 8 at the hydrophilic membrane 12 location;

[0053] The exhaust pipe 10 is arranged in a ring array with multiple exhaust pipes 10. One end of each exhaust pipe 10 is connected to the cavity of the cover ring 11. The exhaust pipe 10 is placed in the gap between the outer shell 7 and the inner cylinder 8, and one end of the exhaust pipe 10 is located at the top of the outer shell 7.

[0054] A rubber stopper 9 is provided at the top of the inner cylinder 8, and the diameter of the rubber stopper 9 is smaller than the diameter formed by the top ends of the plurality of exhaust pipes 10.

[0055] In this embodiment, the cover ring 11 is closely attached to the outside of the hydrophilic membrane 12 and sealed to the outer wall of the inner cylinder 8 to form a continuous collection cavity; the lower end of the exhaust pipe 10 of the annular array is connected to the cavity of the cover ring 11, and the upper end extends to the top edge of the outer shell 7, so that the gas enters the cover ring 11 along the membrane surface and rises straight up, and is discharged to the outside through each exhaust pipe 10, while the liquid is blocked by the membrane wall and cannot enter the exhaust channel.

[0056] After the rubber plug 9 is inserted into the opening of the inner cylinder 8, its outer edge is connected to the outside atmosphere through the annular opening left on the inner side of the top of the exhaust pipe 10, ensuring that the exhaust path is unobstructed, while preventing the rubber plug 9 from blocking the outlet of the exhaust pipe 10.

[0057] Please see Figures 1-10 As a preferred embodiment of this utility model, the air isolation valve includes:

[0058] A horizontal tube 17 is connected to the inner cylinder 8, and a vertical tube 16 is provided at one end of the horizontal tube 17.

[0059] A drain pipe 15 is horizontally arranged on the riser 16 and is connected to the horizontal pipe 17 through the riser 16.

[0060] The air isolation valve also includes:

[0061] An abutment ring 18 is fixed to the inner wall of the riser 16, and a through hole is provided in the center of the abutment ring 18;

[0062] A float 19 is adapted to abut against the through hole. The float 19 is disposed in the cavity of the riser 16. A spring 20 is fixedly connected to the float 19, and the other end of the spring 20 is fixedly connected to the top of the cavity of the riser 16.

[0063] In this embodiment, the horizontal tube 17 extends horizontally from the lowest point of the inner cylinder 8 to ensure that the residual liquid in the cylinder can completely enter the valve cavity; the vertical tube 16 extends vertically upward to provide sufficient lifting and lowering guide stroke for the float 19; the drain tube 15 is arranged laterally on the side wall of the vertical tube 16 and communicates with the cavity of the vertical tube 16 to form a lateral liquid outlet channel, which facilitates quick docking with an external syringe.

[0064] The contact ring 18 is fixed to the inner wall of the riser 16, and its center forms a line contact seal with the spherical surface of the float 19 through the hole. The two ends of the spring 20 are fixed to the top of the float 19 and the top of the cavity of the riser 16, respectively, providing a slight pre-tightening force so that the float 19 falls immediately and presses against the through hole at the moment the liquid is lost, blocking air from entering the downstream passage. When the liquid column refills the riser 16, the float 19 is lifted by the liquid, the spring 20 is stretched, the through hole reopens, and the liquid flow is restored. This avoids the generation of air bubbles in the contrast agent at the end during the extraction of contrast agent, which would affect the injection safety.

[0065] Please see Figures 1-9 As a preferred embodiment of this utility model, the stirring structure includes:

[0066] Rotating column 14, which rotates at the bottom of the inner cylinder 8;

[0067] A stirring paddle 13 is fixed to the top of the rotating column 14. The horizontal height of the stirring paddle 13 is parallel to the center of the hydrophilic membrane 12. Both the stirring paddle 13 and the rotating column 14 contain magnetic particles.

[0068] In this embodiment, the rotating column 14 is rotatably supported at the bottom center of the inner cylinder 8, and the stirring paddle 13 is fixed to the top of the rotating column 14. The horizontal height of the paddle is flush with the center of the hydrophilic membrane 12, so that the bubble layer generated by centrifugation faces the membrane surface and shortens the migration path. Magnetic particles are evenly distributed inside both. The machine base 1 is equipped with a magnetic field drive mechanism in the prior art. Under the drive of the rotating magnetic field of the machine base 1, it rotates synchronously to realize the radial circulation of the contrast agent and the aggregation of bubbles in the inner cylinder 8. At the same time, it ensures that the magnetic particles can still assist in positioning after the rotation stops, preventing rotor drift.

[0069] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0070] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic constant-temperature mixing, defoaming, and air-blocking device for contrast agent injection, comprising a base (1) and a mixing disc (2) disposed on the base (1), characterized in that: The mixing plate (2) is provided with a plurality of defoaming storage mechanisms, the defoaming storage mechanisms including: The outer shell (7) has an inner cylinder (8) for storing contrast agent inside the outer shell (7). There is a gap between the outer shell (7) and the inner cylinder (8). The gap is filled with microencapsulated alkanes. The bottom of the inner cylinder (8) is provided with a stirring structure for rotating to achieve centrifugal mixing of the contrast agent. A hydrophilic membrane (12) is attached to the bottom side wall of the inner cylinder (8). The hydrophilic membrane (12) and the exhaust structure provided on the inner cylinder (8) together form an exhaust channel for discharging the gas in the inner cylinder (8) to the gap and communicating with the outside through the top edge of the outer shell (7). An air isolation valve is provided on the bottom outer wall of the outer shell (7), and its cavity is connected to the liquid outlet of the inner cylinder (8) for closing the channel when the liquid is lost and opening the channel when the liquid is present.

2. The automatic constant-temperature mixing, defoaming, and air-blocking device before contrast agent injection according to claim 1, characterized in that: A top cover (5) is rotatably connected to one side of the mixing disc (2), and a fastener for fixing the mixing disc (2) and the top cover (5) is provided.

3. The automatic constant-temperature mixing, defoaming, and air-blocking device before contrast agent injection according to claim 2, characterized in that: The mixing disk (2) has a ring array of multiple placement holes (3), and each placement hole (3) has an electric heating ring (4) on its inner wall. The top cover (5) is fitted with a rubber sealing ring (6) to match each placement hole (3).

4. The automatic constant-temperature mixing, defoaming, and air-blocking device before contrast agent injection according to claim 1, characterized in that: The outer shell (7) and inner cylinder (8) are arranged in an inverted cone shape, and the hydrophilic membrane (12) is disposed on the bottom side wall of the inner cylinder (8) at the converging part.

5. The automatic constant-temperature mixing, defoaming, and air-blocking device before contrast agent injection according to claim 4, characterized in that: The exhaust structure includes: Cover ring (11), the cover ring (11) is provided on the outer wall of the inner cylinder (8) at the hydrophilic membrane (12) position; Exhaust pipe (10), multiple exhaust pipes (10) are arranged in a ring array, one end of each exhaust pipe (10) is connected to the cavity of the cover ring (11), the exhaust pipe (10) is placed in the gap between the outer shell (7) and the inner cylinder (8), and one end of the exhaust pipe (10) is located at the top of the outer shell (7).

6. The automatic constant-temperature mixing, defoaming, and air-blocking device before contrast agent injection according to claim 5, characterized in that: The top of the inner cylinder (8) is provided with a rubber plug (9), the diameter of which is smaller than the diameter formed by the top ends of the plurality of exhaust pipes (10).

7. The automatic constant-temperature mixing, defoaming, and air-blocking device before contrast agent injection according to claim 1, characterized in that: The air isolation valve includes: A horizontal tube (17) is connected to the inner cylinder (8), and a vertical tube (16) is provided at one end of the horizontal tube (17). Drainage pipe (15) is horizontally arranged on the riser (16) and is connected to the horizontal pipe (17) through the riser (16).

8. The automatic constant-temperature mixing, defoaming, and air-blocking device before contrast agent injection according to claim 7, characterized in that: The air isolation valve also includes: An abutment ring (18) is fixed to the inner wall of the riser (16), and a through hole is provided in the center of the abutment ring (18); A float (19) is adapted to abut against the through hole. The float (19) is disposed in the cavity of the riser (16). A spring (20) is fixedly connected to the float (19). The other end of the spring (20) is fixedly connected to the top of the cavity of the riser (16).

9. The automatic constant-temperature mixing, defoaming, and air-blocking device before contrast agent injection according to claim 1, characterized in that: The stirring structure includes: Rotating column (14), which rotates at the bottom of the inner cylinder (8); A stirring paddle (13) is fixed to the top of the rotating column (14). The horizontal height of the stirring paddle (13) is parallel to the center of the hydrophilic membrane (12). Both the stirring paddle (13) and the rotating column (14) contain magnetic particles.

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