Drainage device with auxiliary medicine diffusion function
By designing a single-injection and unidirectional drainage structure for the drainage device, the problem of drugs not being able to concentrate on the core area of the abscess was solved, achieving efficient drug ablation and drainage, and reducing the risk of inflammatory response.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-17
- Publication Date
- 2026-04-10
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The current method of drug injection in abscess drainage devices prevents the medication from being concentrated in the core area of the abscess, causing the medication to diffuse into the surrounding normal tissue, affecting the treatment effect and potentially causing irritation.
Design a drainage device that achieves single-port drug injection and unidirectional drainage by adjusting and controlling the movement of the shell. Combined with the reciprocating movement of the drug-pushing piston and the liquid-pushing piston, a closed loop of "impact-peeling-absorption" is formed to ensure that the drug solution forms a uniform concentration field in the abscess cavity and improve drug utilization.
It improves the ablation speed and drainage efficiency of the drug in the abscess structure, reduces the diffusion of the drug to surrounding tissues, and lowers the risk of inflammatory response.
Smart Images
Figure CN121819072A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of medical drainage technology, and specifically points out a drainage device with auxiliary drug diffusion function. Background Technology
[0002] In the clinical treatment of surgical infectious diseases, abscess drainage is a key treatment method. Its core objective is to completely drain the pus, necrotic tissue and other pathological secretions from the lesion through a special drainage device, while accurately delivering anti-infective drugs, ablative agents and other treatment media to the abscess area, so as to achieve the synergistic therapeutic effect of "drainage and targeted drug delivery" and thus accelerate the healing process of the lesion.
[0003] Currently, widely used abscess drainage devices in clinical practice mainly consist of three parts: the main body of the drainage tube, the drug injection channel, and the drainage channel. The drug injection function is often achieved through a "circumferential injection" design, meaning that multiple dispersed through-holes are opened on the side wall of the drainage tube. The medication is directly injected into the abscess cavity through these porous structures, and combined with the circumferentially distributed drainage holes, the diffusion of the medication within the lesion and the aspiration and drainage of pus are completed simultaneously.
[0004] However, because the drug is injected through multiple dispersed orifices, the drug solution forms multiple dispersed flow fields after entering the abscess cavity. Due to the influence of hydrodynamic properties, these dispersed fluids interfere with and counteract each other, causing the drug solution to fail to concentrate on the core lesion area of the abscess. Instead, it is easy for the drug solution to spread to the surrounding normal tissue, making it difficult to maintain the local drug concentration in the abscess above the effective treatment threshold. In particular, key treatment areas such as the abscess wall and deep lesions cannot obtain sufficient drug infiltration, thereby weakening the anti-infection and ablation treatment effects. Secondly, the drug that spreads to normal tissue can also easily cause local irritation reactions, such as mucosal edema and aggravated inflammation, affecting the patient's treatment tolerance. Summary of the Invention
[0005] To overcome the shortcomings mentioned in the background art, the present invention provides a drainage device with auxiliary drug diffusion function.
[0006] The technical implementation of the present invention is as follows: a drainage device with auxiliary drug diffusion function, comprising a drainage tube, wherein the drainage tube is provided with circumferentially distributed drainage ports, a drug injection tube is fixedly connected inside the drainage tube, the drug injection tube is provided with circumferentially distributed drug injection ports, the drainage tube is provided with a drug storage shell, the drug storage shell is provided with a first cavity, the first cavity of the drug storage shell is connected to the drug injection tube, a drug pushing piston is slidably connected inside the first cavity of the drug storage shell, an adjusting shell is slidably connected to the side of the drug injection tube near the drug injection port, the adjusting shell is provided with a second injection port and circumferentially distributed first injection ports, the number of first injection ports is the same as the number of drug injection ports, and the adjusting shell uses the second injection port and the circumferentially distributed first injection ports thereon to control the communication state of all the drug injection ports on the drug injection tube.
[0007] Furthermore, a second cavity is provided inside the drug storage shell, and a liquid-pushing piston is slidably connected inside the second cavity of the drug storage shell. A liquid-transferring tube communicating with the second cavity inside the drug storage shell is fixedly connected to the drug storage shell, and the end of the liquid-transferring tube away from the liquid-pushing piston is connected to the drug injection tube.
[0008] Furthermore, both the first and second cavities of the drug storage shell are filled with liquid, and the liquid in the first and second cavities is the same.
[0009] Furthermore, the drug storage shell is slidably connected to a pressing rod, the pressing rod is fixedly connected to the drug pushing piston, the pressing rod is slidably connected to the liquid pushing piston, and a first elastic element is provided between the two. An elastic limiting element is provided inside the liquid pushing piston, and the elastic limiting element is used to limit the pressing rod.
[0010] Furthermore, a control shell is rotatably connected to the side of the drainage tube near the regulating shell. The control shell is provided with a second lead hole and a uniformly distributed first lead hole. The control shell controls the connection state of all the drainage ports on the drainage tube through the second lead hole and the uniformly distributed first lead hole. The connection area of the second lead hole is twice the connection area of the first lead hole.
[0011] Furthermore, a drive housing is slidably connected to the side of the drainage tube near the control housing. The drive housing is used to drive the control housing to rotate. The drainage tube is provided with a transition groove communicating with the fluid transfer tube. A second elastic element is provided between the control housing and the drainage tube.
[0012] Furthermore, a control valve is installed in the second cavity of the drug storage shell, a blocking airbag is provided on the side of the drainage tube away from the regulating shell, the drug storage shell is fixedly connected to a connecting pipe, and the blocking airbag is connected to the second cavity of the drug storage shell through the connecting pipe.
[0013] Furthermore, the drainage tube is rotatably connected to an installation sleeve, the installation sleeve is provided with scale lines, and an indicator needle is fixedly connected to the drainage tube.
[0014] Furthermore, a support pipe is fixedly connected to one of the drainage ports near the drainage tube, and the support pipe is connected to the transition groove.
[0015] Furthermore, the support tube is a flexible tube.
[0016] In combination with the above technical solutions, the present invention has the following advantages: By adjusting the reciprocating movement of the shell, the present invention changes the communication state between the injection port on the injection tube and the patient's body, thereby achieving single-port injection when injecting drugs into the patient's body, increasing the impact force on the abscess structure in the patient's body, reducing the dispersion of the drug solution to the surrounding normal tissues, ensuring that the drug solution forms a uniform concentration field in the abscess cavity, thereby improving the drainage efficiency.
[0017] This invention achieves reciprocating injection and extraction of a mixture within the patient's body through the reciprocating movement of a drug-pumping piston. This allows the mixture to repeatedly enter and exit the first cavity of the drug storage shell, accelerating the mixing of the drug solution and pus, thereby assisting the drug solution in diffusing within the pus, increasing the ablation speed of the abscess structure, and facilitating subsequent drainage of pus.
[0018] This invention controls the rotation of the shell to change the connection between the drainage port on the drainage tube and the patient's body, thereby achieving single-port drainage when draining the mixture in the patient's body. By combining unidirectional drug injection and unidirectional drainage, a closed loop of "impact-peeling-absorption" is formed, which reduces drug dispersion and improves drug utilization. Attached Figure Description
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the drug injection tube and drug storage shell of the present invention; Figure 3 This is a three-dimensional structural diagram of the control valve and sealing airbag of the present invention; Figure 4 This is a three-dimensional structural diagram of the drug-propelling piston and liquid-propelling piston of the present invention; Figure 5 This is a three-dimensional structural diagram of the first elastic member and the elastic limiting member of the present invention; Figure 6 This is a three-dimensional structural diagram of the drug injection tube and drug injection port of the present invention; Figure 7 This is an exploded three-dimensional view of the drainage tube, drug injection tube, and fluid transfer tube of the present invention. Figure 8 This is a three-dimensional sectional view of the drainage tube of the present invention; Figure 9This is a three-dimensional cross-sectional view of the drug injection tube of the present invention; Figure 10 This is a three-dimensional structural diagram of the control housing and drive housing of the present invention; Figure 11 This is an exploded three-dimensional view of the components at the control shell of the present invention; Figure 12 This is a three-dimensional structural diagram of the mounting sleeve and indicator needle of the present invention.
[0020] The meanings of the reference numerals in the figure are as follows: 1-drainage tube, 11-drainage port, 2-injection tube, 21-injection port, 3-drug storage shell, 4-push piston, 5-adjusting shell, 51-first injection port, 52-second injection port, 201-push piston, 202-liquid transfer tube, 203-pressing rod, 204-first elastic element, 205-elastic limiting element, 301-control shell, 3011-first lead hole, 3012-second lead hole, 302-drive shell, 303-transition groove, 304-second elastic element, 401-control valve, 402-sealing airbag, 403-connecting tube, 501-mounting sleeve, 502-indicator needle, 601-support tube. Detailed Implementation
[0021] In this document, reference to embodiments means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention.
[0022] Example 1: The commonly used abscess drainage devices in hospitals today mainly consist of a drainage tube with dedicated injection and drainage channels. A ring of circular holes is created on the side of the tube, through which medication enters the abscess. Combined with the drainage holes, this allows the medication to spread while simultaneously draining the pus. However, because the circular holes are dispersed, the medication, after being squeezed into multiple holes, splits into multiple streams. These streams collide and interfere with each other within the abscess (like several streams of water rushing against each other), failing to concentrate on the core of the abscess. Instead, some medication may migrate to surrounding healthy tissue, resulting in insufficient medication in key areas of the abscess (such as the abscess wall and deep lesions), failing to meet the standards for treatment, and thus reducing the effectiveness of anti-infection and abscess reduction. Furthermore, medication that migrates to healthy tissue may irritate these tissues, leading to mucosal edema and exacerbating the inflammatory response.
[0023] A drainage device with auxiliary drug diffusion function, Figures 1-10As shown, the device includes a drainage tube 1, which is connected to an existing drainage unit. The end of the drainage tube 1 has circumferentially distributed drainage ports 11. An injection tube 2 is fixedly connected inside the drainage tube 1, and the end of the injection tube 2 has circumferentially distributed injection ports 21. The drainage tube 1 is equipped with a drug storage shell 3, which has a first cavity containing drainage medication. The first cavity of the drug storage shell 3 is connected to the injection tube 2. A pusher piston 4 is slidably connected within the first cavity of the drug storage shell 3. The pusher piston 4 consists of a piston plate, a round rod, and a pressing plate. The piston plate slidably seals against the drug storage shell 3. An adjusting shell 5 is slidably connected to the side of the injection tube 2 near the injection port 21. The adjusting shell 5 is equipped with… There is a second injection port 52 and circumferentially distributed first injection ports 51. The number of first injection ports 51 is the same as the number of injection ports 21, and the first injection ports 51 and the injection ports 21 correspond one-to-one. When the first injection port 51 is aligned with the adjacent injection port 21 (initial state), the liquid medicine in the injection tube 2 can enter or exit circumferentially through all the injection ports 12. The second injection port 52 corresponds to one of the injection ports 21. When the second injection port 52 is aligned with the corresponding injection port 21, the liquid medicine in the injection tube 2 can only be discharged or enter through that injection port 12. The regulating shell 5 uses the second injection port 52 and the circumferentially distributed first injection ports 51 on it to control the connection state of all injection ports 21 on the injection tube 2.
[0024] by Figures 1-5 As shown, the directional relationships in this section are based on... Figure 4 For example, a second cavity is provided on the right side of the drug storage shell 3, and a limiting ring is provided in the second cavity (see reference). Figure 3 and Figure 4 A liquid-pushing piston 201 is slidably connected to the second cavity of the drug storage shell 3. The liquid-pushing piston 201 consists of a piston plate and a round rod. The piston plate of the liquid-pushing piston 201 slides in a sealed manner with the drug storage shell 3. A limiting ring inside the drug storage shell 3 is used to limit the liquid-pushing piston 201. A liquid transmission pipe 202 communicating with the second cavity is fixedly connected to the upper side of the drug storage shell 3. The end of the liquid transmission pipe 202 away from the liquid-pushing piston 201 is connected to the injection pipe 2. By injecting liquid into the injection pipe 2, the liquid pushes the adjusting shell 5 to move. The liquid-pushing piston 201 divides the second cavity of the drug storage shell 3 into two parts. The upper part of the second cavity stores liquid, and the liquid is the same as the liquid in the first cavity.
[0025] by Figures 1-5 As shown, a pressing rod 203 is slidably connected to the drug storage shell 3. In this embodiment, the pressing rod 203 and the drug storage shell 3 are not sealed and slide together (limited to this embodiment). The pressing rod 203 is fixedly connected to the pressing plate of the drug pushing piston 4, and the pressing rod 203 is slidably connected to the liquid pushing piston 201. A first elastic element 204 is provided between the two. An exhaust hole (e.g., on the side of the pressing rod 203 near the pressing plate on the drug pushing piston 4) is provided. Figure 5As shown), the vent hole is used to ensure that the pressing rod 203 and the liquid-pushing piston 201 can slide smoothly relative to each other. The first elastic element 204 is a spring. An elastic limiting element 205 is provided inside the liquid-pushing piston 201. The elastic limiting element 205 is composed of a limiting post and a spring. A blind hole is provided on the pressing rod 203. The elastic limiting element 205 is used to limit the blind hole on the pressing rod 203.
[0026] When using this device to drain abscess structures in a patient, the specific operation is as follows: Preparation: Insert the drainage tube 1 into the patient's body. The drainage tube 1 moves the drug injection tube 2, and the drug injection tube 2 moves the adjusting shell 5 inside it synchronously. After the drainage tube 1 moves to the designated position, fix the drainage tube 1 to prevent it from shifting in the patient's body. After fixing the drainage tube 1, the preparation work is completed.
[0027] Traffic generation efforts: First, the doctor presses the medication piston 4, which squeezes the liquid medication in the first chamber of the medication storage shell 3, causing the liquid medication to enter the injection tube 2. The injection tube 2 guides the liquid medication, allowing it to be discharged into the patient's body through all the first injection ports 51 and all the injection ports 21. The liquid medication then comes into contact with the abscess in the patient's body and ablates it, thereby destroying the abscess structure and liquefying it, thus forming pus. After the injection begins, the doctor activates the drainage unit, which starts working and creates negative pressure in the drainage tube 1. A mixture of some of the liquid medication and pus in the patient's body enters the drainage tube 1 through the drainage port 11, and then the mixture is discharged from the patient's body.
[0028] During the movement of the pusher piston 4, the pusher piston 4 drives the pressing rod 203 to move. The pressing rod 203 drives the liquid pusher piston 201 to move synchronously through the first elastic element 204. The liquid pusher piston 201 injects the liquid in the second chamber into the liquid transfer tube 202. The liquid transfer tube 202 guides the liquid to the injection tube 2 and causes this part of the liquid to push the adjusting shell 5 to move. The adjusting shell 5 drives all the first injection ports 51 and the second injection ports 52 to move, so that the first injection port 51 gradually loses communication with the adjacent injection port 21, while the second injection port 52 gradually connects with the corresponding injection port 21.
[0029] When the push piston 201 cannot move, the second injection port 52 is fully connected to the corresponding injection port 21. Then, the push piston 4 is pressed, and the push piston 4 continues to squeeze the liquid in the first chamber. This part of the liquid enters the injection tube 2 and is discharged into the patient's body through the second injection port 52 and the corresponding injection port 21. This achieves single-port injection, increases the pressure of the liquid discharge, and achieves concentrated impact on the abscess structure at the lesion site. The concentrated impact makes the liquid energy concentrated at the target site, reduces the diffusion to the surrounding normal tissue, and ensures that the liquid forms a uniform concentration field at the abscess cavity. This allows the liquid to act on the abscess wall in a concentrated manner, achieving "precise ablation", thereby further improving the efficiency of abscess liquefaction and drainage.
[0030] During the continued pressing of the medication piston 4, the liquid injection piston 201 cannot move. The medication piston 4 drives the pressing rod 203 to continue moving and compress the first elastic element 204. The pressing rod 203 and the liquid injection piston 201 begin to slide relative to each other. Then, when the pressing rod 203 contacts the elastic limiting element 205, the pressing rod 203 squeezes the elastic limiting element 205. When the medication piston 4 cannot move, the liquid in the first chamber is completely injected into the patient's body. At this time, the blind hole on the pressing rod 203 is aligned with the elastic limiting element 205, and the elastic limiting element 205 enters the blind hole on the pressing rod 203, thereby using the elastic limiting element 205 to limit the pressing rod 203.
[0031] After the first injection is completed, the doctor pulls the drug-pushing piston 4. The movement of the drug-pushing piston 4 creates a negative pressure in the first chamber. Under the action of the negative pressure, part of the mixture in the patient's body slowly enters the injection tube 2 through the second injection port 52 and the corresponding drug injection port 21, and enters the first chamber of the drug storage shell 3, so that the mixture is fully mixed, reducing the viscosity of the pus and improving the efficiency of pus drainage.
[0032] During the process of pulling the drug-pushing piston 4, the drug-pushing piston 4 drives the pressing rod 203 to move. The pressing rod 203 drives the liquid-pushing piston 201 to move through the elastic limiting member 205, so that a negative pressure is formed in the second cavity of the drug storage shell 3. Under the action of the negative pressure, the liquid medicine between the injection tube 2 and the regulating shell 5 flows back to the second cavity through the liquid transmission tube 202. During this process, the regulating shell 5 moves in the opposite direction, so that the first injection port 51 is gradually connected with the adjacent injection port 21. Until the liquid-pushing piston 201 can no longer move, the regulating shell 5 is reset, and the first injection port 51 is completely connected with the adjacent injection port 21.
[0033] After the liquid injection piston 201 can no longer move, the drug injection piston 4 is pulled continuously. Part of the mixture in the patient's body enters the first cavity through the first injection port 51 and the adjacent drug injection port 21. Part of the mixture in the patient's body is drawn out circumferentially through all the first injection ports 51, increasing the area covered by the extraction force, so that the pus in different locations can fully contact the drug solution, further reducing the viscosity of the pus, thus making it easier to drain the pus.
[0034] After the liquid-pushing piston 201 becomes immobile, the drug-pushing piston 4 moves the pressing rod 203. The pressing rod 203 squeezes the elastic limiting member 205, causing the blind hole between the elastic limiting member 205 and the pressing rod 203 to disengage. After the elastic limiting member 205 loses contact with the pressing rod 203, the elastic limiting member 205 resets. Then, as the drug-pushing piston 4 continues to move, the pressing rod 203 begins to slide relative to the liquid-pushing piston 201, and the first elastic member 204 gradually unfolds until it resets.
[0035] After the medication plunger 4 is reset, the doctor repeats the above drainage procedure, pressing and pulling the medication plunger three to five times to ensure that the pus in the patient's body comes into full contact with the medication, thereby improving the drainage efficiency. After completing the repeated operation, the doctor presses the medication plunger 4 to completely inject the mixture in the first chamber into the patient's body. During this process, the drainage unit continues to work and draws out the pus from the patient's body. After the pus is drawn out, the drainage procedure ends, and the drainage unit is turned off.
[0036] Final steps: The doctor removed drainage tube 1 from the patient's body. Drainage tube 1, along with the other internal components, was then moved out of the patient's body. The medication injection piston 4 was then reset.
[0037] Example 2: Based on Example 1, Figures 8-11 As shown, a control shell 301 is rotatably connected to the side of the drainage tube 1 near the regulating shell 5. The control shell 301 is provided with a second lead hole 3012 and a uniformly distributed first lead hole 3011. The second lead hole 3012 and the uniformly distributed first lead hole 3011 correspond one-to-one with all the drainage ports 11. Initially, the second lead hole 3012 and the uniformly distributed first lead hole 3011 are aligned with and connected to the adjacent drainage ports 11. The control shell 301 controls the connection state of all the drainage ports 11 on the drainage tube 1 through the second lead hole 3012 and the uniformly distributed first lead hole 3011. The connection area of the second lead hole 3012 is twice the connection area of the first lead hole 3011. The side of the control shell 301 is provided with circumferentially distributed inclined guide surfaces.
[0038] by Figures 8-11As shown, a drive housing 302 is slidably connected to the side of the drainage tube 1 near the control housing 301. The drive housing 302 consists of a circular shell and several cylinders. A circumferentially distributed inclined extrusion surface is provided on the left side of the drive housing 302 (this direction is...). Figure 11 (For reference), the drive housing 302 is used to drive the control housing 301 to rotate, so that the evenly distributed first lead holes 3011 are disconnected from the corresponding drainage ports 11, and the second lead holes 3012 are connected to the corresponding drainage ports 11; the drainage ports 11 and the second injection ports 52 corresponding to the second lead holes 3012 are aligned in the axial direction; the drainage pipe 1 is provided with a transition groove 303 connected to the liquid transmission pipe 202. After the liquid transmission pipe 202 injects the liquid into the transition groove 303, the liquid pushes the drive housing 302 to move. A second elastic element 304 is provided between the control housing 301 and the drainage pipe 1. The second elastic element 304 is an elastic column, which is used to drive the control housing 301 to reset.
[0039] The working principle of this embodiment: Following the operation of Example 1, during the process of pressing the drug delivery piston 4 and injecting it into the patient's body, the drainage body is in working condition. Part of the mixture in the patient's body passes through all the drainage ports 11. This part of the mixture enters the drainage tube 1 through the second drainage hole 3012 and the evenly distributed first drainage hole 3011, and then flows along the drainage tube 1 and is discharged from the patient's body.
[0040] During the flow of the liquid medicine in the second cavity along the liquid transfer tube 202, the liquid transfer tube 202 guides the liquid medicine within it, causing a portion of the liquid medicine to enter the injection tube 2. Then, the operation of the adjusting shell 5 in Example 1 is repeated, and another portion of the liquid medicine in the liquid transfer tube 202 enters the transition groove 303. The amount of liquid medicine in the transition groove 303 increases and squeezes the driving shell 302, causing the driving shell 302 to slide along the drainage tube 1. During this process, the inclined squeezing surface of the driving shell 302 squeezes the inclined guiding surface of the control shell 301, causing the control shell 301 to begin rotating clockwise (towards...). Figure 11 (Based on the right view perspective), the control shell 301 presses the second elastic element 304 on it, and the control shell 301 drives the second lead hole 3012 and the evenly distributed first lead hole 3011 on it to rotate gradually, so that the evenly distributed first lead hole 3011 gradually loses communication with the corresponding drain port 11.
[0041] During the rotation of the control shell 301, the adjustment shell 5 moves synchronously until the adjustment shell 5 stops moving, at which point the control shell 301 stops rotating. At this time, the uniformly distributed first orifices 301 lose communication with their corresponding drainage ports 11, while the second orifices 3012 remain connected to their corresponding drainage ports 11, and the second injection port 52 is connected to its corresponding injection port 21. Subsequently, during the single-port injection of medication into the patient's body, the drainage unit drains the patient through the drainage tube 1. At this time, the mixture in the patient's body can only enter the drainage tube 1 through the second orifice 3012 and its corresponding drainage port 11, thus achieving directional drainage. During this process, the second injection port 52 is oriented towards the lesion site, and the second orifice 3012 is oriented towards the lesion site. The impact flow of directional injection and the concentrated negative pressure of directional drainage form a "synergistic force." After the medication impacts the lesion site with high pressure, it is quickly absorbed and discharged by the second orifice 3012, forming a closed loop of "impact-peeling-extraction," thereby reducing the dispersion of the medication and improving its utilization rate.
[0042] During the reverse movement of the regulating shell 5, the liquid transfer pipe 202 extracts the liquid medicine from the transition tank 303, the drive shell 302 begins to move in reverse and loses its pressure on the control shell 301, and the control shell 301 begins to move in reverse under the action of the second elastic element 304. All the first lead holes 301 gradually connect with the corresponding lead ports 11 until the regulating shell 5 is reset, and the control shell 301 is also reset synchronously.
[0043] When the adjusting shell 5 moves again, the control shell 301 rotates synchronously, and the above process is repeated.
[0044] Example 3: Based on Example 2, Figures 1-4 As shown, a control valve 401 is installed in the second cavity of the drug storage shell 3. The control valve 401 is located in the lower part of the second cavity (this orientation is shown in the figure). Figure 4 (For reference only); In this embodiment, the pressing rod 203 slides in a sealed manner with the drug storage shell 3, and a blocking airbag 402 is provided on the side of the drainage tube 1 away from the adjusting shell 5. The blocking airbag 402 is used to block the drainage tube 1. The drug storage shell 3 is fixedly connected to a connecting pipe 403, and the blocking airbag 402 is connected to the lower part of the second cavity inside the drug storage shell 3 through the connecting pipe 403.
[0045] The working principle of this embodiment: When using this device for drainage, first open the control valve 401, then repeat the pressing of the drug-push piston 4 as in Example 1. The drug-push piston 4 drives the liquid-push piston 201 to move via the pressing rod 203. The liquid-push piston 201 squeezes the liquid in the second chamber, and at the same time, a negative pressure is formed on the side of the liquid-push piston 201 near the pressing rod 203. Outside air enters the second chamber through the control valve 401, thus ensuring that the liquid-push piston 201 can move smoothly. After the liquid-push piston 201 can no longer move, close the control valve 401. During this process, the sealing airbag 402 does not block the drainage tube 1, thereby ensuring that the drug injection process and the drainage process are synchronized, and ensuring that the pressure in the patient's body does not change drastically.
[0046] During the pulling of the drug-injecting piston 4, some of the mixture in the patient's body enters the first chamber of the drug storage shell 3 through the injection tube 2, and the liquid-injecting piston 201 gradually resets, squeezing the air in the second chamber. At this time, the control valve 401 is in the closed state, and the air in the second chamber enters the sealing airbag 402 through the connecting tube 403. The sealing airbag 402 gradually expands, thereby gradually sealing the drainage tube 1, thus stopping the drainage of pus from the patient's body. This allows some of the pus in the patient's body to enter only the first chamber, thus avoiding the simultaneous extraction of pus from the patient's body by the injection tube 2 and the drainage tube 1, which would cause a sharp drop in the pressure inside the patient's body and reduce damage to the patient.
[0047] During the subsequent pressing of the drug-pushing piston 4, the control valve 401 is not opened. The liquid-pushing piston 201 pushes the liquid in the second chamber and causes the air in the sealing airbag 402 to flow back into the second chamber. After the drainage operation is completed, the control valve 401 is opened. During the resetting process of the drug-pushing piston 4, the drug-pushing piston 4 squeezes the air in the second chamber, and the air is discharged to the outside through the control valve 401.
[0048] Example 4: Based on Example 3, Figures 1-3 , Figure 7 and Figure 12 As shown, the drainage tube 1 is rotatably connected to an installation sleeve 501. The installation sleeve 501 is fixed to the patient's skin and positions the drainage tube 1. The installation sleeve 501 has a scale line, and an indicator needle 502 is fixed to the drainage tube 1. During the drainage process, the drainage tube 1 is rotated at regular intervals in conjunction with the scale line on the installation sleeve 501. The drainage tube 1 drives the indicator needle 502 to rotate synchronously. By observing the scale line pointed to by the indicator needle 502, the orientation of the drainage port 11 on the drainage tube 1 is adjusted to change the direction of drainage. The drainage tube 1 drives the drug injection tube 2 to rotate synchronously, thereby adjusting the orientation of the drug injection port 21 on the drug injection tube 2 to achieve precise drug injection, increase the impact of the drug solution on the lesion site, and improve treatment efficiency.
[0049] Example 5: When existing drainage devices are used to drain a patient, the inner wall of the patient's organ comes into direct contact with the drainage hole. The suction force generated by the drainage tube can easily act on the inner wall of the patient's organ, thereby causing damage to the patient's organ.
[0050] Based on Example 4, Figure 3 , Figure 5 and Figure 8 As shown, a support tube 601 is fixedly connected to the drainage tube 1 near one of the drainage ports 11. The support tube 601 is a flexible tube that is initially in a contracted state when it enters the patient's body. The support tube 601 is connected to the transition groove 303. During the process of injecting medication into the transition groove 303, the medication in the transition groove 303 enters the support tube 601, and the support tube 601 gradually expands until it is full of medication. After that, the support tube 601 deforms to the state shown in the figure. When performing unilateral drainage on the patient, the support tube 601 supports the inner wall of the patient's organ, reduces the suction force generated by the drainage port 11 on the inner wall of the patient's organ, and reduces the probability of damage to the patient.
[0051] Although the present invention has been described in detail with reference to the above embodiments, the detailed description of the embodiments disclosed herein is for explanation only and not for limiting the present invention.
Claims
1. A drainage device with auxiliary drug diffusion function, characterized in that: It includes a drainage tube (1), which is provided with circumferentially distributed drainage ports (11). A drug injection tube (2) is fixedly connected inside the drainage tube (1). The drug injection tube (2) is provided with circumferentially distributed drug injection ports (21). The drainage tube (1) is provided with a drug storage shell (3). The drug storage shell (3) is provided with a first cavity. The first cavity of the drug storage shell (3) is connected to the drug injection tube (2). A drug pushing piston (4) is slidably connected inside the first cavity of the drug storage shell (3). The injection tube (2) is slidably connected to an adjustment shell (5) on the side near the injection port (21). The adjustment shell (5) is provided with a second injection port (52) and a first injection port (51) distributed in a circumferential direction. The number of the first injection ports (51) is the same as the number of injection ports (21). The adjustment shell (5) uses the second injection port (52) and the first injection ports (51) distributed in a circumferential direction on it to control the connection state of all the injection ports (21) on the injection tube (2).
2. A drainage device with auxiliary drug diffusion function according to claim 1, characterized in that: The drug storage shell (3) is provided with a second cavity. A liquid-pushing piston (201) is slidably connected in the second cavity of the drug storage shell (3). The drug storage shell (3) is fixedly connected to a liquid-transferring tube (202) that communicates with the second cavity inside it. The end of the liquid-transferring tube (202) away from the liquid-pushing piston (201) is connected to the drug injection tube (2).
3. A drainage device with auxiliary drug diffusion function according to claim 2, characterized in that: The first and second cavities of the drug storage shell (3) are filled with liquid, and the liquid in the first and second cavities is the same.
4. A drainage device with auxiliary drug diffusion function according to claim 3, characterized in that: The drug storage shell (3) is slidably connected to a pressing rod (203), the pressing rod (203) is fixedly connected to the drug pushing piston (4), the pressing rod (203) is slidably connected to the liquid pushing piston (201), and a first elastic element (204) is provided between the two. An elastic limiting element (205) is provided inside the liquid pushing piston (201), and the elastic limiting element (205) is used to limit the pressing rod (203).
5. A drainage device with auxiliary drug diffusion function according to claim 4, characterized in that: The drainage tube (1) is rotatably connected to a control shell (301) on the side near the regulating shell (5). The control shell (301) is provided with a second lead hole (3012) and a uniformly distributed first lead hole (3011). The control shell (301) controls the connection state of all the drainage ports (11) on the drainage tube (1) through the second lead hole (3012) and the uniformly distributed first lead hole (3011). The connection area of the second lead hole (3012) is twice the connection area of the first lead hole (3011).
6. A drainage device with auxiliary drug diffusion function according to claim 5, characterized in that: The drainage tube (1) is slidably connected to a drive shell (302) on the side near the control shell (301). The drive shell (302) is used to drive the control shell (301) to rotate. The drainage tube (1) is provided with a transition groove (303) that communicates with the liquid transfer tube (202). A second elastic element (304) is provided between the control shell (301) and the drainage tube (1).
7. A drainage device with auxiliary drug diffusion function according to claim 6, characterized in that: A control valve (401) is installed in the second cavity of the drug storage shell (3). A blocking airbag (402) is provided on the side of the drainage tube (1) away from the regulating shell (5). A connecting pipe (403) is fixedly connected to the drug storage shell (3). The blocking airbag (402) is connected to the second cavity of the drug storage shell (3) through the connecting pipe (403).
8. A drainage device with auxiliary drug diffusion function according to claim 7, characterized in that: The drainage tube (1) is rotatably connected to an installation sleeve (501), the installation sleeve (501) is provided with a scale line, and an indicator needle (502) is fixedly connected to the drainage tube (1).
9. A drainage device with auxiliary drug diffusion function according to claim 8, characterized in that: The drainage tube (1) is fixedly connected to a support tube (601) near one of the drainage ports (11), and the support tube (601) is connected to the transition groove (303).
10. A drainage device with auxiliary drug diffusion function according to claim 9, characterized in that: The support tube (601) is a flexible tube.