Medical fluid replacement multi-cavity catheter

Abstract

The invention discloses a medical fluid replacement multi-cavity catheter, and relates to the technical field of replacement catheters, and the medical fluid replacement multi-cavity catheter has the advantages that the liquid medicine foaming time is shortened, the liquid medicine foaming efficiency is improved, and one person can operate with one hand. A connecting pipe is integrally formed at the near end of the catheter body, a partition plate assembly dividing the connecting pipe into a plurality of chambers with different purposes is integrally formed in the connecting pipe, the partition plate assembly extends into an inner cavity of the catheter body and divides the inner cavity of the catheter body into a plurality of chambers, and a plurality of extension pipes are fixed to the connecting pipe. Each extension pipe is communicated with one cavity of the inner cavity of the connecting pipe, a preparation cylinder is fixed to the end, away from the connecting pipe, of one extension pipe, a liquid medicine injection pipe communicated with the preparation cylinder is arranged on the preparation cylinder, and a foaming assembly for primarily foaming liquid medicine is arranged at the joint of the liquid medicine injection pipe and the preparation cylinder.

Description

Technical Field

[0001] This invention relates to the field of replacement catheter technology, specifically to a medical fluid replacement multi-lumen catheter. Background Technology

[0002] Varicose veins are a common and frequently occurring disease, referring to the tortuous and dilated veins caused by factors such as blood stasis and weakened vein walls. Varicose veins can occur in veins in various parts of the body, including: lower extremity varicose veins, portal hypertension-esophageal varices, spermatic cord varices, hemorrhoids, and pelvic venous congestion syndrome. Currently, the main treatment for varicose veins is open surgery. Minimally invasive surgical methods such as thermal ablation and sclerotherapy have only been gradually developed in recent years and are still in their early stages. Thermal ablation techniques mainly include laser, microwave, and radiofrequency ablation. These methods achieve the goal of sealing blood vessels by destroying them. Thermal ablation for varicose veins is complex and can easily damage normal tissue. Because it destroys blood vessels to seal them, the stagnant blood in the diseased veins cannot be drained in time, easily leading to thrombosis and thrombophlebitis, resulting in poor treatment outcomes.

[0003] Sclerotherapy involves injecting a chemical sclerosing agent into varicose veins, causing a secondary inflammatory response in the vein walls. Post-operative continuous pressure causes the veins to collapse, and granulation tissue subsequently grows fibrosed within the collapsed vein lumen, eventually forming fibrous bands, thus achieving the goal of treating varicose veins. However, it has drawbacks such as pain, significant local irritation, poor venous closure, and the risk of deep vein thrombosis.

[0004] Foam sclerosing agents are a new type of foam-like sclerosing agent formed by mixing liquid sclerosing agents with gas. They can avoid a series of complications such as deep vein thrombosis. With their high efficiency, speed, safety, low cost, repeatability, and scarlessness, they have become one of the most important developments in the field of venous medicine in the past 10 years.

[0005] Traditionally, when using foam sclerosing agents, clinicians need to use two syringes: one filled with liquid sclerosing agent, and the other with four times the volume of air. These syringes are connected by a three-way connector, and the syringes are rapidly aspirated and pumped back and forth about 20 times until a uniform foam is formed before injection. Because the injection requires slow, multiple injections, and if the injection site turns white rapidly or the patient experiences pain, the injection must be stopped immediately for observation until the symptoms subside. This results in multiple pauses during the injection process, making the entire injection time lengthy, and the sclerosing foam disappears. To avoid complications such as deep vein thrombosis, the foam sclerosing agent needs to be prepared by aspirating the syringe before each injection.

[0006] Therefore, the use of foam sclerosing agents in existing medical fluid replacement multi-lumen catheters not only increases the workload of clinicians, requiring medical staff to operate with both hands and increasing the preparation time of foam sclerosing agents, but also increases the psychological and physiological burden on patients. Summary of the Invention

[0008] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a medical fluid replacement multi-lumen catheter, which has the advantages of reducing drug foaming time, improving drug foaming efficiency, and can be operated by one person with one hand.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] This invention provides a medical fluid replacement multi-lumen catheter, comprising a catheter body having a proximal end and a distal end. A connecting tube is integrally formed at the proximal end of the catheter body. A partition assembly is integrally formed within the connecting tube, dividing the connecting tube into multiple chambers for different purposes. The partition assembly extends into the inner lumen of the catheter body and divides the inner lumen into multiple chambers. Several extension tubes are fixed to the connecting tube, each extension tube communicating with one of the chambers within the connecting tube. A preparation tube is fixed to the end of one of the extension tubes away from the connecting tube. A drug injection tube communicating with the preparation tube is provided on the preparation tube. A foaming component for preliminary foaming drug solution is provided at the connection between the drug injection tube and the preparation tube.

[0011] By adopting the above technical solution, the connecting tube and the catheter body are separated by a partition assembly, dividing the inner lumen of the connecting tube and the catheter body into multiple chambers. These chambers are used for injecting medication, blood return drainage, and inserting guidewires, respectively. Each extension tube is connected to an adjacent chamber. The medication enters the preparation tube through the medication injection tube and then enters one of the chambers through the preparation tube and the extension tube. The medication foams as it passes through the foaming assembly, reducing the foaming time and improving the foaming efficiency. It can be operated by one person with one hand, increasing the surface tension of the medication, damaging the endothelial cells of varicose veins, causing aseptic inflammation of the blood vessel wall, forming dense fibrous strands, and curing varicose veins.

[0012] Preferably, the foaming component includes an outer sleeve integrally formed with the preparation cylinder and communicating with the inner cavity of the preparation cylinder. The drug injection tube is located inside the outer sleeve and extends out of the outer sleeve at one end away from the preparation cylinder. The drug injection tube is closed at one end facing the preparation cylinder and open at the other end. The closed end of the drug injection tube has a plurality of evenly arranged drainage holes. The middle position of the closed end of the drug injection tube has an integrally formed conical guide plate that guides the drug liquid. An auxiliary component is provided between the drug injection tube and the outer sleeve to fix the drug injection tube and assist in foaming.

[0013] Through the above technical solution, the liquid medicine enters the liquid medicine injection tube and is discharged through multiple drainage holes. Under the action of auxiliary components, the discharged liquid medicine mixes with air to form foam, and enters the preparation cylinder along the conical guide plate through the action of the conical guide plate.

[0014] Preferably, the auxiliary component includes an inner sleeve disposed in the gap between the outer sleeve and the drug injection tube. The inner sleeve is sleeved outside the drug injection tube and fixedly connected to the drug injection tube. The bottom of the inner sleeve is fixedly connected to the bottom of the outer sleeve. The inner sleeve has several evenly arranged through holes. The gap between the drug injection tube and the inner sleeve, as well as the gap between the outer sleeve and the inner sleeve, are connected through the several through holes. The end of the outer sleeve away from the preparation cylinder is fixedly and sealed to the drug injection tube. The outer sleeve has an integrally formed branch tube that communicates with the inner cavity of the outer sleeve.

[0015] Through the above technical solution, the syringe containing the drug solution is connected to the drug injection tube, and the syringe containing a small amount of air is connected to the branch tube. The drug solution is manually pushed, and the drug solution enters the drug injection tube and is discharged through the drain hole. At this time, the drug solution flow rate increases and the pressure decreases. At this time, the air in the gap between the outer tube and the inner tube enters the inner tube through the through hole under the action of pressure. The air mixes with the drug solution to form foam, and the foamed drug solution enters the preparation cylinder along the conical guide plate.

[0016] Preferably, the preparation cylinder is equipped with a foaming component for further foaming of the medicinal liquid.

[0017] With the above technical solution, when the initially foamed medicine enters the preparation cylinder, some of the medicine is still not fully foamed. Therefore, the medicine is foamed again by the foaming component, so that the medicine forms a uniform and delicate white foam.

[0018] Preferably, the foaming assembly includes a fixed tube fixed outside the preparation cylinder, the fixed tube having a hollow inner cavity, a support rod rotatably connected inside the fixed tube, one end of the support rod extending into the preparation cylinder and rotatably connected to the preparation cylinder, a connecting plate fixed to the portion of the support rod extending into the inner cavity of the preparation cylinder, and a foaming rod fixed to the end of the connecting plate away from the support rod for stirring the medicinal liquid in the preparation cylinder to facilitate foaming of the medicinal liquid, the size of the foaming rod being adapted to the size of the preparation cylinder, and a control assembly for controlling the rotation of the foaming rod, the connecting plate, and the support rod being provided inside the fixed tube.

[0019] The above technical solution provides power through the control components, which drives the support rod, connecting plate and bubble rod to rotate. The bubble rod rotates and stirs the medicine liquid in the preparation cylinder. During the stirring process, the medicine liquid is able to form a uniform and delicate white foam.

[0020] Preferably, the control component includes a follower block fixedly connected to the support rod, the follower block having a follower groove, an active block slidably connected inside the fixed tube, the active block having a hollow inner cavity with an opening facing the follower block, the follower block extending into the inner cavity of the active block, a short shaft radially fixed on the outer circumferential wall of the active block, the end of the short shaft away from the active block extending into the follower groove, a spring being provided between the follower block and the active block, one end of the spring being fixed to the follower block, a slider being fixed on the fixed tube, and a sliding groove adapted to the slider being provided on the outer circumferential wall of the active block.

[0021] Through the above technical solution, a fixed tube extends from the top of the active block. Pressing the active block provides power. When the active block moves, the spring is compressed. The movement of the active block is guided by the cooperation of the slider and the groove. The movement of the active block will drive the short shaft fixedly connected to the active block to move. The short shaft moves in the follower groove, which will drive the follower block to rotate. The rotation of the follower block will drive the support rod, connecting plate and bubbling rod fixed to the follower block to rotate, so as to facilitate the stirring and preparation of the medicine liquid in the cylinder.

[0022] Preferably, the end of the preparation tube away from the extension tube has a circular hole, and a push rod that is slidably connected to the circular hole passes through the circular hole. One end of the push rod is fixed with a piston located inside the preparation tube and adapted to the inner cavity of the preparation tube, and the other end is fixed with a handle located outside the preparation tube. The piston has a groove on the side facing the bubbling rod that is adapted to the size of the bubbling rod.

[0023] With the above technical solution, after the liquid medicine forms a uniform and delicate white foam, the staff grabs the handle and manually pushes the handle to provide power, which drives the piston fixed to the handle to move. The piston moves and pushes the liquid medicine in the preparation cylinder into the extension tube. The piston is provided with a groove. When the piston moves to the end of the preparation cylinder, the foaming rod extends into the groove. The groove does not affect the movement of the piston.

[0024] Preferably, the partition assembly includes a cylindrical tube fixed in the middle of the connecting tube, one end of the cylindrical tube extending to the catheter body, the cylindrical tube extending to the distal end opening of the catheter body, the outer circumferential wall of the cylindrical tube being fixedly connected to the inner wall of the connecting tube by a partition plate, the partition plate extending to the inner cavity of the catheter body, and the catheter body being divided into cavity A, cavity B, and cavity C by the cylindrical tube and the partition plate.

[0025] The above technical solution uses a cylindrical tube and a partition plate to divide the connecting tube and the main body of the catheter into lumen A, lumen B, and lumen C, all of which are connected to the outside, facilitating the drainage of medication, blood return, and insertion of guidewires, thereby improving the efficiency of catheter use.

[0026] Preferably, the distal end of cavity B is provided with a dispersing component that allows the foamy medicine to be discharged again.

[0027] The above technical solution uses a dispersing component to make the liquid medicine fly out in a foamy manner, thus ensuring that the liquid medicine is evenly distributed.

[0028] Preferably, the dispersing component includes a trachea connecting cavity B and cavity C, the diameters of cavity B and cavity C gradually decreasing towards the trachea to form a trumpet shape, cavity B having a discharge hole located outside the trachea, and the diameter of the trachea at the end away from cavity B gradually increasing and communicating with the discharge hole.

[0029] Through the above technical solution, a portion of the liquid medicine enters cavity B, while the other portion, which forms white foam, enters cavity C. When the liquid medicine enters the trachea, the diameter of the trachea is smaller than the diameter of cavity B. The liquid medicine in cavity B passes through the constricted trachea and enters the outwardly expanding discharge hole, increasing the flow rate and creating a negative pressure zone behind the trachea outlet. This zone adsorbs the foam in cavity C, and the liquid medicine and foam mix to form a foam mixture, which is then discharged through the discharge hole. This reduces the foaming time of the liquid medicine while ensuring that the liquid medicine is evenly distributed.

[0030] The beneficial effects of this invention are as follows: the connecting tube and the catheter body are separated by a partition assembly, dividing the inner cavity of the connecting tube and the catheter body into multiple chambers. These multiple chambers are used for injecting medication, blood return drainage, and inserting guidewires, respectively. Each extension tube is connected to an adjacent chamber. The medication enters the preparation tube through the medication injection tube and then enters one of the chambers through the preparation tube and the extension tube. The medication foams as it passes through the foaming assembly, reducing the foaming time and improving the foaming efficiency. It can be operated by one person with one hand, increasing the surface tension of the drug, causing damage to the endothelial cells of varicose veins, and inducing aseptic inflammation of the blood vessel wall to form dense fibrous strands, thus curing varicose veins. Attached Figure Description

[0031] 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 these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0033] Figure 2 This embodiment Figure 1 Enlarged structural diagram at point A in the middle;

[0034] Figure 3 This is a schematic diagram illustrating the structure of the slider in this embodiment;

[0035] Figure 4 This is a schematic diagram illustrating the structure of the spring in this embodiment;

[0036] Figure 5 This is a schematic cross-sectional view of the preparation tube in this embodiment;

[0037] Figure 6 This is a schematic cross-sectional view of the outer tube in this embodiment;

[0038] Figure 7 This is a schematic diagram illustrating the structure of the drain hole in this embodiment;

[0039] Figure 8 This is a structural schematic diagram illustrating the two partition plates in this embodiment;

[0040] Figure 9 This is a structural diagram illustrating the three partitions in this embodiment;

[0041] Figure 10 This is a schematic cross-sectional view of the catheter body in this embodiment;

[0042] Figure 11 This is a schematic diagram illustrating the structure of the larynx in this embodiment.

[0043] Explanation of reference numerals in the attached figures:

[0044] In the diagram: 1. Main body of the catheter; 101. Proximal end; 102. Distal end; 2. Connecting tube; 3. Extension tube; 4. Preparation tube; 5. Drug injection tube; 501. Drainage hole; 6. Foaming assembly; 701. Outer tube; 702. Conical guide plate; 703. Inner tube; 704. Through hole; 8. Branch tube; 9. Foaming assembly; 901. Fixing tube; 902. Support rod; 903. Connecting plate; 904. Foaming rod; 905. Follower block; 906. Follower groove; 907. Active block; 908. Short shaft; 909. Spring; 910. Slider; 911. Slide groove; 10. Push rod; 11. Piston; 12. Handle; 13. Groove; 14. Cylindrical tube; 15. Separator plate; 16. Throat tube; 17. Drug discharge hole. Detailed Implementation

[0045] 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.

[0046] A medical fluid replacement multilumen catheter, such as Figure 1-11The device includes a slender catheter body 1, which has a proximal end 101 and a distal end 102. The proximal end 101 of the catheter body 1 is integrally formed with a connecting tube 2. A partition assembly is integrally formed inside the connecting tube 2 to divide the connecting tube 2 into multiple chambers for different purposes. The partition assembly extends into the inner cavity of the catheter body 1 and divides the inner cavity of the catheter body 1 into multiple chambers. Several extension tubes 3 are fixed on the connecting tube 2. One end of one of the extension tubes 3, which is away from the connecting tube 2, is fixed with a preparation tube 4 that communicates with one of the chambers of the extension tube 3. A drug injection tube 5 that communicates with the preparation tube 4 is provided on the preparation tube 4. A foaming component 6 for preliminary foaming drug solution is provided at the connection between the drug injection tube 5 and the preparation tube 4.

[0047] like Figure 1 and Figure 8 and Figure 9 The connecting tube 2 and the catheter body 1 are separated by a partition assembly, which divides the inner lumen of the connecting tube 2 and the catheter body 1 into multiple chambers. The multiple chambers are used for injecting medication, blood return drainage, and inserting guide wires, respectively. Each extension tube 3 is connected to the adjacent chamber. The medication enters the preparation tube 4 through the medication injection tube 5, and enters one of the chambers through the preparation tube 4 and the extension tube 3. When the medication passes through the foaming assembly 6, it foams, increases the surface tension of the medication, damages the endothelial cells of varicose veins, causes aseptic inflammation of the blood vessel wall, and forms dense fibrous strands, thus curing varicose veins.

[0048] like Figure 1 and Figure 2 and Figure 5 and Figure 6 and Figure 7 The foaming component 6 includes an outer tube 701 integrally formed with the preparation cylinder 4 and communicating with the inner cavity of the preparation cylinder 4. The medicine injection tube 5 is located inside the outer tube 701 and extends out of the outer tube 701 at one end away from the preparation cylinder 4. The medicine injection tube 5 is closed at one end facing the preparation cylinder 4 and open at the other end. The closed end of the medicine injection tube 5 has several evenly arranged drainage holes 501. The middle position of the closed end of the medicine injection tube 5 has an integrally formed conical guide plate 702 that plays a guiding role for the medicine. An auxiliary component is provided between the medicine injection tube 5 and the outer tube 701 to fix the medicine injection tube 5 and assist in foaming.

[0049] like Figure 1 and Figure 2 and Figure 5 and Figure 6 and Figure 7 The liquid medicine enters the liquid medicine injection pipe 5 and is discharged through multiple drainage holes 501. Under the action of the auxiliary components, the discharged liquid medicine mixes with air to form foam, and enters the preparation cylinder 4 along the conical guide plate 702 through the action of the conical guide plate 702.

[0050] like Figure 1 and Figure 2 and Figure 5 and Figure 6 and Figure 7 The auxiliary components include an inner sleeve 703 disposed in the gap between the outer sleeve 701 and the drug injection tube 5. The inner sleeve 703 is sleeved outside the drug injection tube 5 and fixedly connected to the drug injection tube 5. The bottom of the inner sleeve 703 is fixedly connected to the bottom of the outer sleeve 701. The inner cavity of the drug injection tube 5 and the inner cavity of the inner sleeve 703 are connected through a drain hole 501. The inner sleeve 703 has several evenly arranged through holes 704. The gap between the drug injection tube 5 and the inner sleeve 703 and the gap between the outer sleeve 701 and the inner sleeve 703 are connected through several through holes 704. The end of the outer sleeve 701 away from the preparation cylinder 4 is fixedly and sealed to the drug injection tube 5. The outer sleeve 701 has an integrally formed branch tube 8 that communicates with the inner cavity of the outer sleeve 701.

[0051] like Figure 1 and Figure 2 and Figure 5 and Figure 6 and Figure 7 The syringe containing the drug solution is connected to the drug injection tube, and the syringe containing a small amount of air is connected to the branch tube 8. The drug solution is manually pushed, and the drug solution enters the drug injection tube and is discharged through the drain hole 501. At this time, the drug solution flow rate increases and the pressure decreases. At this time, the air in the gap between the outer tube 701 and the inner tube 703 enters the inner tube 703 through the through hole 704 under the action of pressure. The air mixes with the drug solution to form foam, and the foamed drug solution enters the preparation cylinder 4 along the conical guide plate 702.

[0052] like Figure 1 Each extension pipe 3, medicine injection pipe 5, and branch pipe 8 is equipped with a connector valve to facilitate the control of pipeline opening and closing.

[0053] like Figure 1 The ends of extension tube 3, liquid injection tube 5 and branch tube 8 are all threadedly connected with sealing caps to seal the ends of extension tube 3 and liquid injection tube 5, thereby reducing contamination.

[0054] like Figure 1 and Figure 2 and Figure 3 and Figure 4 When the initially foamed medicine enters the preparation cylinder 4, some of the medicine is still not fully foamed. Therefore, the preparation cylinder 4 is equipped with a foaming component 9 for further foaming of the medicine. The medicine is foamed again by the foaming component 9, so that the medicine forms a uniform and delicate white foam.

[0055] like Figure 1 and Figure 2 and Figure 3 and Figure 4The foaming component 9 includes a fixed tube 901 fixed outside the preparation cylinder 4. The fixed tube 901 has a hollow inner cavity. A support rod 902 is rotatably connected inside the fixed tube 901. One end of the support rod 902 extends into the preparation cylinder 4 and is rotatably connected to the preparation cylinder 4. A connecting plate 903 is fixed to the part of the support rod 902 that extends into the inner cavity of the preparation cylinder 4. A foaming rod 904 is fixed to the end of the connecting plate 903 away from the support rod 902 to stir the liquid in the preparation cylinder 4 to facilitate foaming. The size of the foaming rod 904 is adapted to the size of the preparation cylinder 4. The fixed tube 901 is provided with a control for the foaming rod 904 and the connecting plate 903. The control component that rotates the support rod 902 provides power to drive the support rod 902, connecting plate 903 and bubble rod 904 to rotate. The bubble rod 904 rotates and stirs the medicine liquid in the preparation cylinder 4. During the stirring process, the medicine liquid disperses and the surface area increases, that is, new surfaces are generated. The newly generated surfaces adsorb gas. When the dispersed medicine liquid falls back, the adsorbed gas will be carried into the medicine liquid. Like attracts like, liquid molecules with similar properties will re-aggregate, and the gas is replaced. Since the gases are also similar, they will also gather together to form bubbles, so that the medicine liquid can form a uniform and delicate white foam.

[0056] like Figure 1 and Figure 2 and Figure 3 and Figure 4 The control assembly includes a follower block 905 fixedly connected to the support rod 902, a follower groove 906 on the follower block 905, an active block 907 slidably connected inside the fixed tube 901, the active block 907 has a hollow inner cavity with an opening facing the follower block 905, the follower block 905 extends into the inner cavity of the active block 907, a short shaft 908 is radially fixed on the outer circumference of the active block 907, the end of the short shaft 908 away from the active block 907 extends into the follower groove 906, a spring 909 is provided between the follower block 905 and the active block 907, one end of the spring 909 is fixed to the follower block 905, a slider 910 is fixed on the fixed tube 901, and a groove 911 adapted to the slider 910 is provided on the outer circumference of the active block 907.

[0057] like Figure 1 and Figure 2 and Figure 3 and Figure 4 A fixed tube 901 extends from the top of the active block 907. Pressing the active block 907 provides power. When the active block 907 moves, the spring 909 is compressed. The movement of the active block 907 is guided by the cooperation of the slider 910 and the groove 911. The movement of the active block 907 will drive the short shaft 908 fixedly connected to the active block 907 to move. The short shaft 908 moves in the follower groove 906, which will drive the follower block 905 to rotate. The rotation of the follower block 905 will drive the support rod 902, the connecting plate 903 and the bubbling rod 904 fixed to the follower block 905 to rotate, so as to facilitate the stirring of the medicine liquid in the preparation cylinder 4.

[0058] like Figure 1 and Figure 5 The preparation cylinder 4 has a circular hole at one end away from the extension tube 3. A push rod 10 is slidably connected to the circular hole. One end of the push rod 10 is fixed with a piston 11 located inside the preparation cylinder 4 and adapted to the inner cavity of the preparation cylinder 4. The other end is fixed with a handle 12 located outside the preparation cylinder 4. The piston 11 has a groove 13 on the side facing the bubbling rod 904 that is adapted to the size of the bubbling rod 904.

[0059] like Figure 1 and Figure 5 When the liquid medicine forms a uniform and delicate white foam, the staff grabs the handle 12 and manually pushes the handle 12 to provide power, which drives the piston 11 fixed to the handle 12 to move. The piston 11 moves and pushes the liquid medicine in the preparation cylinder 4 into the extension tube 3. The piston 11 is provided with a groove 13. When the piston 11 moves to the end of the preparation cylinder 4, the foaming rod 904 extends into the groove 13. The groove 13 does not affect the movement of the piston 11.

[0060] like Figure 8 and Figure 9 The partition assembly includes a cylindrical tube 14 fixed in the middle of the connecting tube 2. One end of the cylindrical tube 14 extends to the catheter body 1. The cylindrical tube 14 extends to the distal end 102 of the catheter body 1. The outer circumferential wall of the cylindrical tube 14 is fixedly connected to the inner wall of the connecting tube 2 by a partition plate 15. The partition plate 15 extends into the inner cavity of the catheter body 1. The catheter body 1 is divided into cavity A, cavity B, and cavity C by the cylindrical tube 14 and the partition plate 15.

[0061] like Figure 8 and Figure 9 The connecting tube 2 and the catheter body 1 are divided into lumen A, lumen B and lumen C by the cylindrical tube 14 and the partition plate 15. All three lumens A, B and C are connected to the outside, which facilitates the discharge of medicine, blood return and insertion of guide wire, and improves the efficiency of catheter use.

[0062] like Figure 8 and Figure 9 Staff can select a catheter body 1 containing an appropriate number of partitions 15 as needed. The inner cavity of the catheter body 1 is divided into multiple chambers by cylindrical tubes 14 and partitions 15 to improve the efficiency of catheter use.

[0063] like Figure 8 and Figure 9 and Figure 10 and Figure 11 The distal end 102 of cavity B is provided with a dispersing component that allows the foamy medicine to be discharged again. By setting the dispersing component, the medicine is discharged in a foamy manner, so that the medicine is evenly distributed.

[0064] like Figure 10 and Figure 11 The dispersing component includes a throat tube 16 connecting cavities B and C. The diameters of cavities B and C gradually decrease towards the throat tube 16, forming a funnel shape. A discharge hole 17 is opened on cavity B, located outside the throat tube 16. The diameter of the end of the throat tube 16 away from cavity B gradually increases and is connected to the discharge hole 17. Part of the liquid medicine enters cavity B, and the other part of the liquid medicine forming white foam enters cavity C. When the liquid medicine enters the throat tube 16, the diameter of the throat tube 16 is smaller than the diameter of cavity B. The liquid medicine in cavity B passes through the constricted throat tube 16 and enters the outwardly expanding discharge hole 17, increasing the flow rate. A negative pressure zone is formed behind the outlet of the throat tube 16, adsorbing the foam in cavity C. The liquid medicine and foam mix to form a foam mixture, which is discharged through the discharge hole 17. This reduces the foaming time of the liquid medicine and allows the liquid medicine to be evenly distributed.

[0065] In use, the staff selects an appropriate number of connecting tubes 2 and conduit bodies of the partition plates 15, and each extension tube 3 is connected to each chamber. The extension tube 3 connected to the preparation cylinder 4 is sealed. The staff inserts a syringe containing foam hardener into the drug injection tube 5. A syringe containing a small amount of air is connected to the branch tube 8. The staff manually pushes the drug, and the drug enters the drug injection tube and is discharged through several small-diameter drainage holes 501. At this time, the drug flow rate increases and the pressure decreases. At this time, the air in the gap between the outer tube 701 and the inner tube 703 enters the inner tube 703 through the through hole 704 under the action of pressure and mixes with the drug to foam. The foamed drug enters the preparation cylinder 4 along the conical guide plate 702.

[0066] The foaming of the medicinal liquid entering the preparation cylinder 4 is incomplete. The operator grasps the portion of the active block 907 extending from the fixed tube 901 and manually presses the active block 907 to provide power. The active block 907 moves, compressing the spring 909, which experiences a reaction force. This force, through the cooperation of the slider 910 and the groove 911, guides the movement of the active block 907. The movement of the active block 907 drives the short shaft 908, which is fixedly connected to the active block 907, to move along the follower groove 906. The follower groove 906 consists of two opposing strip grooves and an inclined groove connecting the two strip grooves. The long side of the strip groove is aligned with the direction of the fixed tube 901. With the centerline parallel, the short shaft 908 moves within the inclined groove under pressure. At this time, the follower block 905 rotates, and the rotation of the follower block 905 will drive the support rod 902, connecting plate 903 and bubble rod 904 fixed to the follower block 905 to rotate. When the short shaft 908 moves to the end of the inclined groove, the active block 907 is no longer pressed, the spring 909 rebounds, and the active block 907 returns to its original position under the action of the spring 909. The short shaft 908 slides within the strip groove. The above operation is repeated, and the support rod 902, connecting plate 903 and bubble rod 904 rotate multiple times to facilitate stirring of the medicine in the preparation cylinder 4 until the medicine forms a uniform and delicate white foam.

[0067] Afterwards, the staff opened the extension tube 3 connected to the preparation cylinder 4, grasped the handle 12, and manually pushed the handle 12 to provide power, which drove the piston 11 fixed to the handle 12 to move. The piston 11 moved and pushed the medicine in the preparation cylinder 4 into the extension tube 3 and the chamber connected to the extension tube 3. The piston 11 is provided with a groove 13. When the piston 11 moves to the end of the preparation cylinder 4, the bubbling rod 904 extends into the groove 13. The groove 13 does not affect the movement of the piston 11.

[0068] Simultaneously, the syringe containing a portion of the foam hardening agent solution is connected to other extension tubes 3, and the foam hardening agent solution in the syringe enters the chamber connected to the extension tube 3. When the solution enters the throat tube 16, the solution in the chamber enters the outwardly expanding discharge hole 17 through the constricted throat tube 16, the flow rate increases, and a negative pressure zone is formed behind the outlet of the throat tube 16. The chamber containing the foamy solution is connected to the chamber containing the solution through the throat tube 16. Due to the pressure, the foamy solution in the chamber containing the foamy solution is adsorbed. The solution and the foamy solution mix and form a foam mixture, which is discharged through the discharge hole 17, reducing the foaming time of the solution while ensuring that the solution is evenly distributed.

[0069] The remaining chambers can be used for blood return, injection of other medications, or insertion of guidewires, which can be used according to the needs of medical staff, thus improving the applicability of the device.

[0070] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A medical fluid replacement multi-lumen catheter, characterized in that, The catheter body (1) includes a proximal end (101) and a distal end (102). The proximal end (101) of the catheter body (1) is integrally formed with a connecting tube (2). A partition assembly is integrally formed inside the connecting tube (2) to divide the connecting tube (2) into multiple chambers for different purposes. The partition assembly extends into the inner cavity of the catheter body (1) and divides the inner cavity of the catheter body (1) into multiple chambers. A plurality of extension tubes (3) are fixed on the connecting tube (2). Each extension tube (3) is connected to one of the chambers inside the connecting tube (2). One of the extension tubes (3) is fixed to a preparation cylinder (4) at the end away from the connecting tube (2). A medicine injection tube (5) connected to the preparation cylinder (4) is provided on the preparation cylinder (4). A foaming component (6) for the initial foaming medicine is provided at the connection between the medicine injection tube (5) and the preparation cylinder (4).

2. The medical fluid replacement multi-lumen catheter as described in claim 1, characterized in that, The foaming component (6) includes an outer tube (701) integrally formed with the preparation cylinder (4) and communicating with the inner cavity of the preparation cylinder (4). The drug injection tube (5) is located inside the outer tube (701) and extends out of the outer tube (701) at one end away from the preparation cylinder (4). The drug injection tube (5) is closed at one end facing the preparation cylinder (4) and open at the other end. The closed end of the drug injection tube (5) is provided with a plurality of uniformly arranged drainage holes (501). The middle position of the closed end of the drug injection tube (5) is provided with an integrally formed conical guide plate (702) that plays a guiding role for the drug liquid. An auxiliary component is provided between the drug injection tube (5) and the outer tube (701) to fix the drug injection tube (5) and assist in foaming.

3. The medical fluid replacement multi-lumen catheter as described in claim 2, characterized in that, The auxiliary component includes an inner sleeve (703) disposed in the gap between the outer sleeve (701) and the liquid injection tube (5). The inner sleeve (703) is sleeved on the outside of the liquid injection tube (5) and fixedly connected to the liquid injection tube (5). The bottom of the inner sleeve (703) is fixedly connected to the bottom of the outer sleeve (701). The inner sleeve (703) is provided with a plurality of evenly arranged through holes (704). The gap between the liquid injection tube (5) and the inner sleeve (703) and the gap between the outer sleeve (701) and the inner sleeve (703) are connected through the plurality of through holes (704). The end of the outer tube (701) away from the preparation cylinder (4) is fixed and sealed to the drug injection tube (5), and a branch tube (8) communicating with the inner cavity of the outer tube (701) is integrally formed on the outer tube (701).

4. The medical fluid replacement multi-lumen catheter as described in claim 1, characterized in that, The preparation cylinder (4) is equipped with a foaming component (9) for further foaming of the medicine.

5. A medical fluid replacement multi-lumen catheter as described in claim 4, characterized in that, The foaming component (9) includes a fixed tube (901) fixed outside the preparation cylinder (4). The inner cavity of the fixed tube (901) is hollow. A support rod (902) is rotatably connected inside the fixed tube (901). One end of the support rod (902) extends into the preparation cylinder (4) and is rotatably connected to the preparation cylinder (4). A connecting plate (903) is fixed to the part of the support rod (902) extending into the inner cavity of the preparation cylinder (4). A foaming rod (904) is fixed to the end of the connecting plate (903) away from the support rod (902) to stir the liquid in the preparation cylinder (4) so ​​as to facilitate foaming of the liquid. The size of the foaming rod (904) is adapted to the size of the preparation cylinder (4). A control component for controlling the rotation of the foaming rod (904), the connecting plate (903) and the support rod (902) is provided inside the fixed tube (901).

6. A medical fluid replacement multi-lumen catheter as described in claim 5, characterized in that, The control assembly includes a follower block (905) fixedly connected to the support rod (902), the follower block (905) having a follower groove (906), an active block (907) slidably connected inside the fixed tube (901), the active block (907) having a hollow inner cavity and opening towards the follower block (905), the follower block (905) extending into the inner cavity of the active block (907), and a short shaft radially fixed on the outer circumferential wall of the active block (907). 908), the short shaft (908) extends away from the active block (907) into the follower groove (906), a spring (909) is provided between the follower block (905) and the active block (907), one end of the spring (909) is fixed to the follower block (905), a slider (910) is fixed on the fixed tube (901), and a groove (911) adapted to the slider (910) is opened on the outer circumference of the active block (907).

7. A medical fluid replacement multi-lumen catheter as described in claim 5, characterized in that, The preparation cylinder (4) has a circular hole at one end away from the extension tube (3). A push rod (10) is slidably connected to the circular hole. One end of the push rod (10) is fixed with a piston (11) located inside the preparation cylinder (4) and adapted to the inner cavity of the preparation cylinder (4). The other end is fixed with a handle (12) located outside the preparation cylinder (4). The piston (11) has a groove (13) on the side facing the bubbling rod (904) that is adapted to the size of the bubbling rod (904).

8. A medical fluid replacement multi-lumen catheter as described in claim 1, characterized in that, The partition assembly includes a cylindrical tube (14) fixed in the middle of the connecting tube (2). One end of the cylindrical tube (14) extends to the catheter body (1) and extends to the distal end (102) of the catheter body (1). The outer circumferential wall of the cylindrical tube (14) is fixedly connected to the inner wall of the connecting tube (2) by a partition plate (15). The partition plate (15) extends into the inner cavity of the catheter body (1). The catheter body (1) is divided into cavity A, cavity B, and cavity C by the cylindrical tube (14) and the partition plate (15).

9. A medical fluid replacement multi-lumen catheter as described in claim 8, characterized in that, The distal end (102) of the B cavity is provided with a dispersing component that allows the foamy medicine to be discharged again.

10. A medical fluid replacement multi-lumen catheter as described in claim 9, characterized in that, The dispersing component includes a trachea (16) connecting cavity B and cavity C. The diameters of cavities B and C gradually decrease towards the trachea (16) in a trumpet shape. A discharge hole (17) located outside the trachea (16) is opened on cavity B. The diameter of the end of the trachea (16) away from cavity B gradually increases and is connected to the discharge hole (17).

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