Anti-exosmosis chemotherapy dosing device for medical oncology

Abstract

The invention discloses an anti-exosmosis chemotherapy dosing device for medical oncology, which belongs to the technical field of tumor chemotherapy and comprises a moving rod, a support rod is fixedly mounted at the top end of the moving rod, a dosing bottle is arranged on one side of the support rod, and an infusion mechanism forming a gas-liquid pressure self-balancing system is arranged at the bottom end of the dosing bottle. The infusion mechanism comprises an injection head inserted into a bottle opening of the medicine feeding bottle, a first connecting block is arranged on the injection head, and an infusion tube is installed at the free end of the injection head in a communicating mode. Meanwhile, redundant liquid can be rapidly shunted and reflowed through the backflow pipe, the backflow pressure peak value can be effectively absorbed through a buffering bag supported by a honeycomb support in the flow slowing cavity, vortex can be avoided through a built-in flow guiding component and a flexible silica gel miniature flow limiting valve, and the problem of damage caused by too high pipeline pressure is solved to the maximum extent.

Description

Technical Field

[0001] This invention relates to the field of tumor chemotherapy technology, and in particular to an anti-extravasation chemotherapy delivery device for medical oncology. Background Technology

[0002] In clinical oncology, chemotherapy is one of the core treatment methods, and chemotherapy drugs are mostly administered intravenously. Currently, most commonly used chemotherapy administration devices only have basic drug delivery and extravasation prevention functions. In terms of flow rate control, traditional devices often use manual adjustment of throttling components to control the flow rate, which has low adjustment precision and is prone to causing turbulence in the tubing due to sudden changes in flow rate. This not only generates a large number of air bubbles but may also increase the risk of drug extravasation. At the same time, when the pressure in the tubing rises abnormally, there is a lack of an effective pressure relief and backflow mechanism, and excess liquid cannot be diverted in time, which can easily cause tubing damage, drug leakage, and thus lead to serious complications such as local tissue necrosis and inflammatory reactions in patients. Summary of the Invention

[0003] The purpose of this invention is to provide an anti-extravasation chemotherapy delivery device for oncology, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an anti-extravasation chemotherapy administration device for oncology, comprising a movable rod, a support rod fixedly installed at the top of the movable rod, a drug administration bottle disposed on one side of the support rod, an infusion mechanism disposed at the bottom of the drug administration bottle, the infusion mechanism comprising an injection head inserted into the mouth of the drug administration bottle, a first connecting block disposed on the injection head, an infusion tube connected to the free end of the injection head, a reflux assembly disposed on the infusion tube, the reflux assembly comprising a second connecting block disposed on the infusion tube, a reflux tube connected between the first connecting block and the second connecting block, an exhaust assembly disposed on the outside of the infusion tube, the exhaust assembly comprising an auxiliary air tube inserted into the mouth of the drug administration bottle, an air bag connected to the free end of the auxiliary air tube, a membrane for air permeability and water resistance disposed on the auxiliary air tube, and a pneumatic connecting tube connected between one end of the auxiliary air tube and the reflux tube.

[0005] As a preferred embodiment of the present invention, two pressure plates are installed on the pneumatic connecting pipe, and the diaphragm is located between the two pressure plates. An installation plate is fixedly installed on the top of the moving rod, and a fixing frame is fixedly installed on one side of the installation plate, with the auxiliary air pipe snapped into the fixing frame.

[0006] As a preferred embodiment of the present invention, the inner wall of the auxiliary air tube is provided with a spiral groove, the interior of the auxiliary air tube is provided with a filter rod, and the outer surface of the filter rod is provided with a plurality of air vents.

[0007] As a preferred embodiment of the present invention, the injection head is provided with a throttling ring for controlling the flow of liquid in the infusion tube, and a drug delivery tube is connected to one side of the first connecting block, and a piston is provided at the free end of the drug delivery tube.

[0008] As a preferred embodiment of the present invention, a one-way valve is provided between the reflux pipe and the first connecting block. Multiple fixing plates are fixedly installed inside the second connecting block. A sealing plate for sealing the infusion tube is rotatably installed on the top of the fixing plate. A second gear is fixedly installed inside the second connecting block and is fixedly connected to the sealing plate. A third connecting block is fixedly installed on one side of the second connecting block. A first gear is rotatably installed inside the third connecting block and meshes with the second gear. A driving component is fixedly installed on the top of the third connecting block, and the output shaft of the driving component is fixedly connected to the first gear.

[0009] As a preferred embodiment of the present invention, the reflux pipe is provided with a flow-slowing component, the flow-slowing component includes a flow-slowing cavity connected to and installed on the reflux pipe, a honeycomb support is installed inside the flow-slowing cavity, and a buffer bladder for buffering the medicine is installed in the middle of the honeycomb support through multiple support balls.

[0010] As a preferred embodiment of the present invention, the interior of the buffer bladder is provided with a flow guiding component along the axial direction of the bladder body to reduce the turbulence of the drug solution. The flow guiding component includes a plurality of flexible silicone micro-flow limiting valves installed on the outside for automatically adjusting the opening degree according to the pressure.

[0011] As a preferred embodiment of the present invention, the infusion tube is provided with a collection tube for temporarily storing the drug solution, and the end of the collection tube near the injection head is provided with a guide bend for slowing down the flow of the liquid.

[0012] As a preferred embodiment of the present invention, a protective mechanism is provided on the outside of the infusion tube. The protective mechanism includes a circular plate installed on the outer surface of the infusion tube, a spring fixedly installed between the second connecting block and the circular plate, and a pressure-resistant reinforcing wire to reduce the deformation of the infusion tube is provided on the outside of the infusion tube. Multiple retaining rings for stabilizing the pressure-resistant reinforcing wire are installed on the outer surface of the infusion tube.

[0013] As a preferred embodiment of the present invention, the support rod is provided with a stabilizing mechanism, the stabilizing mechanism including a support cylinder fixedly installed on the support rod, the inside of the support cylinder is fitted with a rubber inner liner for placing a medicine bottle by means of a locking pin, and a plurality of buffer pads are fixedly installed between the inner liner and the support cylinder, and a connecting rope is fixedly installed at the bottom end of the support cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This invention achieves basic regulation of infusion flow rate through a throttling ring. Combined with a flow control mechanism consisting of a drive component, gear set, and sealing plate within the second connecting block, it can precisely adjust the opening and closing of the infusion tube and the flow rate, reducing turbulence and bubbles caused by sudden changes in flow rate. At the same time, the return tube serves as a pressure relief bypass, capable of receiving instantaneous high-pressure liquid generated by sudden changes in flow rate within the pipeline. The buffer bladder supported by the honeycomb support in the slow-flow chamber can effectively absorb the peak return pressure. The built-in flow guiding component and flexible silicone micro-flow limiting valve can prevent the generation of eddies. Through a gas-liquid linkage compensation mechanism, the liquid pressure fluctuations within the infusion tube are converted into gas pressure regulation, avoiding flow rate oscillations caused by the fluid's 'water hammer effect', maximizing the solution to the problem of damage caused by excessive pipeline pressure, and improving the stability of drug administration.

[0016] 2. This invention forms an exhaust passage through an auxiliary trachea, an air bag, and a breathable, water-resistant membrane, enabling gas-liquid separation, preventing drug leakage, and simultaneously expelling gas from the pipeline. Furthermore, the spiral grooves on the inner wall of the auxiliary trachea work in conjunction with the filter rod to filter impurities in the air and slow down the airflow, preventing outside air from rapidly entering and causing bubbles. At the same time, the pneumatic connecting tube connects the auxiliary trachea to the return tube, allowing for the timely discharge of trace bubbles generated during the return process. This dual protection prevents bubbles from mixing with the drug and causing air embolism, reducing the risk of chemotherapy.

[0017] 3. The present invention uses the spring and circular plate of the protective mechanism to buffer the tensile force on the pipeline. At the same time, the pressure-resistant reinforcing wire and retaining ring on the outside of the infusion tube can effectively prevent the pipeline from bending and deforming, avoid leakage caused by pipeline damage, and reduce the impact of the patient's limb movement on the infusion tube and connection parts, preventing leakage due to seal failure at the connection.

[0018] 4. This invention uses an inner liner and a buffer pad to flexibly fix the administration bottle, preventing the administration bottle from shaking and causing the injection head and bottle mouth to not seal properly. Multiple protections block the extravasation path of the drug from the source, protecting the patient's local tissues. At the same time, the setting of the administration tube and piston facilitates the replenishment of the drug solution or precise administration. The one-way valve can prevent the backflow of liquid from flowing back into the main infusion tube, avoiding drug solution mixing and contamination.

[0019] 5. This invention disperses the stress on the buffer bladder by setting a honeycomb support and support ball in the return tube, preventing the bladder from collapsing and sticking. Combined with the flow guiding component, it reduces the impact of the drug solution on the bladder and reduces the probability of fatigue damage to the silicone material. At the same time, the overall structure takes into account both elastic buffering and rigid support, which can reduce turbulent bubbles generated by the flow of drug solution and improve the stability and durability of the device in long-term chemotherapy infusion, thereby reducing the cost of clinical use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2This is a side view of the structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the drug delivery tube structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the compressive reinforcing wire structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of the first connecting block of the present invention;

[0025] Figure 6 This is a schematic diagram of the internal structure of the buffer bladder of the present invention;

[0026] Figure 7 This is a schematic diagram of the airbag structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal structure of the auxiliary trachea of ​​the present invention;

[0028] Figure 9 This is a schematic diagram of the inner liner plate structure of the present invention.

[0029] In the diagram: 1. Moving rod; 2. Mounting plate; 3. Support rod; 4. Drug bottle; 5. Stabilizing mechanism; 51. Inner liner plate; 52. Locking pin; 53. Support cylinder; 54. Buffer pad; 55. Connecting rope; 6. Infusion mechanism; 61. Injection head; 62. Drug delivery tube; 63. Throttling ring; 64. First connecting block; 65. Guide elbow; 66. Collection tube; 67. Reflux assembly; 671. One-way valve; 672. Flow-slowing component; 6721. Flow-slowing chamber; 6722. Buffer bladder; 6723. Honeycomb support; 6724. Flow-guiding component; 6725. Support 673. Support ball; 674. Return pipe; 675. Second connecting block; 676. Drive component; 677. Third connecting block; 678. First gear; 679. Second gear; 671. Fixing plate; 6710. Sealing plate; 68. Infusion tube; 69. Exhaust assembly; 691. Airbag; 692. Auxiliary air tube; 693. Fixing frame; 694. Pressure plate; 695. Membrane; 696. Pneumatic connecting pipe; 697. Spiral groove; 698. Air filter rod; 7. Protective mechanism; 71. Spring; 72. Round plate; 73. Pressure-resistant reinforcing wire; 74. Snap ring. Detailed Implementation

[0030] 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.

[0031] Please see Figure 1-9 This invention provides an extravasation-preventive chemotherapy administration device for oncology, comprising a movable rod 1, a support rod 3 fixedly mounted at the top of the movable rod 1, a drug administration bottle 4 disposed on one side of the support rod 3, and an infusion mechanism 6 disposed at the bottom of the drug administration bottle 4. The infusion mechanism 6 includes an injection head 61 inserted into the mouth of the drug administration bottle 4, a first connecting block 64 disposed on the injection head 61, and an infusion tube 68 connected to the free end of the injection head 61. A reflux assembly 67 is disposed on the infusion tube 68, and the reflux assembly 67 includes components disposed on the infusion tube. The second connecting block 674 on the infusion tube 68 is connected to the first connecting block 64 and the second connecting block 674 by a return tube 673. An exhaust assembly 69 is provided on the outside of the infusion tube 68. The exhaust assembly 69 includes an auxiliary air tube 692 inserted into the mouth of the administration bottle 4. An air bag 691 is connected to the free end of the auxiliary air tube 692. A membrane 695 for air permeability and water resistance is provided on the auxiliary air tube 692. A pneumatic connecting tube 696 is connected between one end of the auxiliary air tube 692 and the return tube 673.

[0032] In this system, the administration bottle 4 is fixed by the top support rod 3 of the moving rod 1. The injection head 61 of the infusion mechanism 6 is inserted into the mouth of the administration bottle 4, and the drug solution enters the infusion tube 68 through the injection head 61. Then, the patient is given the infusion. During the infusion, the excess drug solution in the infusion tube 68 is diverted through the second connecting block 674. The excess high-pressure drug solution enters the slow flow chamber 6721 through the return tube 673 and compresses the buffer bladder 6722. When the buffer bladder 6722 expands, it forces the air in the slow flow chamber 6721 into the auxiliary air tube 692 through the pneumatic connecting tube 696, thereby increasing the air pressure inside the administration bottle 4 and achieving dynamic balance of pneumatic and hydraulic pressure and flexible damping pressure relief. The breathable and water-resistant membrane 695 only allows gas to pass through and blocks drug leakage, thus forming a closed loop of "administration-return pressure relief-air exhaust". This can effectively avoid damage caused by excessive pipeline pressure, and at the same time, timely discharge of gas in the pipeline reduces the risk of air embolism caused by air bubbles mixed with the drug solution, thereby improving the basic safety and stability of chemotherapy administration.

[0033] Among them, excess liquid reflux refers to the volume compensation behavior of liquid entering the bypass buffer unit under transient high pressure (such as pipeline pressure, blockage backflow). According to Boyle's law, the gas in the liquid compression chamber of the buffer bladder 6722 changes in gas pressure and is fed back to the medicine bottle through the gas path, thereby suppressing sudden changes in flow rate.

[0034] In some embodiments, two pressure plates 694 are installed on the pneumatic connecting pipe 696, and a diaphragm 695 is located between the two pressure plates 694. A mounting plate 2 is fixedly installed on the top of the moving rod 1, a fixing bracket 693 is fixedly installed on one side of the mounting plate 2, and an auxiliary air pipe 692 is snapped into the fixing bracket 693.

[0035] Two pressure plates 694 are installed on the pneumatic connecting pipe 696 to fix the position of the membrane 695, ensuring that the membrane 695 works stably and that the air permeability and water blocking function is stable. The fixing bracket 693 on one side of the mounting plate 2 at the top of the moving rod 1 is used to clamp the auxiliary air pipe 692, which plays a fixed support role for the auxiliary air pipe 692, preventing it from shaking and affecting the exhaust and other operations, making the entire device structure more stable.

[0036] In some embodiments, the inner wall of the auxiliary air tube 692 is provided with a spiral groove 697, the interior of the auxiliary air tube 692 is provided with a filter rod 698, and the outer surface of the filter rod 698 is provided with a plurality of air vents.

[0037] The auxiliary air pipe 692 has a spiral groove 697 on its inner wall to increase the gas flow path and make the gas flow more stable. The auxiliary air pipe 692 is equipped with a filter rod 698 inside. The filter rod 698 has multiple air holes on its outer surface to further filter the gas, ensuring that the gas entering the system is clean, while not affecting the exhaust efficiency and improving the stability and safety of the device.

[0038] In some embodiments, the injection head 61 is provided with a throttling ring 63 for controlling the flow of liquid in the infusion tube 68, and a drug delivery tube 62 is connected to one side of the first connecting block 64, and a piston is provided at the free end of the drug delivery tube 62.

[0039] The injection head 61 is equipped with a throttling ring 63, which controls the flow rate of the infusion tube 68 by adjusting the throttling ring 63, thereby improving the accuracy of treatment. One side of the first connecting block 64 is connected to the drug delivery tube 62, and the piston at the free end of the drug delivery tube 62 can control the drug delivery, increasing the flexibility and controllability of drug delivery.

[0040] In some embodiments, a one-way valve 671 is provided between the reflux pipe 673 and the first connecting block 64. A plurality of fixing plates 679 are fixedly installed inside the second connecting block 674. A sealing plate 6710 for sealing the infusion tube 68 is rotatably installed on the top of the fixing plate 679. A second gear 678 is fixedly installed inside the second connecting block 674 and is fixedly connected to the sealing plate 6710. A third connecting block 676 is fixedly installed on one side of the second connecting block 674. A first gear 677 is rotatably installed inside the third connecting block 676 and meshes with the second gear 678. A driving component 675 is fixedly installed on the top of the third connecting block 676, and the output shaft of the driving component 675 is fixedly connected to the first gear 677.

[0041] A one-way valve 671 is installed between the return pipe 673 and the first connecting block 64 to prevent backflow of the liquid medicine and ensure unidirectional flow of the liquid medicine. The first gear 677 is driven to rotate by the driving component 675, which in turn drives the second gear 678 to rotate. The second gear 678 drives the sealing plate 6710 to rotate. Through the cooperation of the sealing plate 6710 and the fixed plate 679, the flow rate of the liquid medicine is controlled, thereby achieving precise control of the flow of the liquid medicine and avoiding leakage of the liquid medicine and abnormal pipeline pressure.

[0042] In some embodiments, a flow-slowing component 672 is provided on the return pipe 673. The flow-slowing component 672 includes a flow-slowing cavity 6721 connected to the return pipe 673. A honeycomb support 6723 is installed inside the flow-slowing cavity 6721. A buffer bladder 6722 for buffering the medicine is installed in the middle of the honeycomb support 6723 through a plurality of support balls 6725.

[0043] The return tube 673 is equipped with a flow-slowing component 672, and a honeycomb support 6723 is installed in the flow-slowing cavity 6721 to provide stable support for the buffer bladder 6722 and ensure the buffering effect. The buffer bladder 6722 is installed in the middle of the honeycomb support 6723 through the support ball 6725. The buffer bladder 6722 expands elastically under the impact of the liquid, absorbs the pressure peak at the moment of return, avoids turbulence caused by sudden changes in liquid flow rate, stabilizes the return flow rate, prevents the return flow from being "fast and slow", and protects the infusion tube 68.

[0044] In some embodiments, the interior of the buffer bladder 6722 is provided with a flow guide 6724 along the axial direction of the bladder body to reduce drug turbulence. The flow guide 6724 includes a plurality of flexible silicone micro-flow limiting valves installed on the outside, which can automatically adjust the opening degree according to the pressure.

[0045] The buffer bladder 6722 has a flow guide 6724 arranged along the axial direction of the bladder body inside, which can reduce the eddy currents of the medicine in the buffer bladder 6722 and make the flow of the medicine more stable. Multiple flexible silicone micro flow limiting valves are installed on the outside of the flow guide 6724, which automatically adjust the opening degree according to the pressure, further stabilize the flow rate of the medicine, enhance the buffering effect of the buffer bladder 6722, and improve the stability of the device.

[0046] In some embodiments, the infusion tube 68 is provided with a collection tube 66 for temporarily storing the drug solution, and a guide bend 65 for slowing down the flow of liquid is provided at one end of the collection tube 66 near the injection head 61.

[0047] Among them, the liquid collecting pipe 66 can act as a buffer when the liquid flow is unstable, temporarily storing excess liquid and avoiding excessive instantaneous impact of the liquid; the flow guiding elbow 65 reduces the liquid flow rate by changing the direction of liquid flow, reducing the generation of bubbles and ensuring the stability of liquid delivery.

[0048] In some embodiments, a protective mechanism 7 is provided on the outside of the infusion tube 68. The protective mechanism 7 includes a circular plate 72 installed on the outer surface of the infusion tube 68, a spring 71 fixedly installed between the second connecting block 674 and the circular plate 72, and a pressure-resistant reinforcing wire 73 for reducing the deformation of the infusion tube 68 is provided on the outside of the infusion tube 68. A plurality of retaining rings 74 for stabilizing the pressure-resistant reinforcing wire 73 are installed on the outer surface of the infusion tube 68.

[0049] Among them, the spring 71 can buffer the infusion tube 68 when it is subjected to external force, and protect the infusion tube 68; the retaining ring 74 stabilizes the pressure-resistant reinforcing wire 73, which increases the strength of the infusion tube 68, reduces deformation, and prevents the flow of medicine from being affected by the deformation of the infusion tube 68.

[0050] In some embodiments, a stabilizing mechanism 5 is provided on the support rod 3. The stabilizing mechanism 5 includes a support cylinder 53 fixedly installed on the support rod 3. A rubber inner liner 51 for placing the drug delivery bottle 4 is installed inside the support cylinder 53 through a locking pin 52. A plurality of buffer pads 54 are fixedly installed between the inner liner 51 and the support cylinder 53. A connecting rope 55 is fixedly installed at the bottom end of the support cylinder 53.

[0051] The support cylinder 53 and the connecting rope 55 can support the drug bottle 4, while the rubber inner liner plate 51 can better fix the drug bottle 4 and reduce shaking; the buffer pad 54 can buffer the vibration and impact on the drug bottle 4 and protect the drug bottle 4 and the internal liquid.

[0052] Working principle: First, the administration bottle 4 is fixed by the support cylinder 53 at the top of the moving rod 1 and the connecting rope 55. During infusion, the injection head 61 is inserted into the mouth of the administration bottle 4, and the medication enters the infusion tube 68 through the injection head 61. Then, the patient is given the infusion. During infusion, the medication in the infusion tube 68 is diverted through the second connecting block 674, and excess medication flows back to the first connecting block 64 through the return tube 673, realizing medication return and tube depressurization. At the same time, the auxiliary trachea 692 is inserted into the administration bottle 4 to balance the internal and external air pressure. The capsule 691 can buffer pressure fluctuations, the breathable and water-resistant membrane 695 only allows gas to pass through and blocks drug leakage, and the pneumatic connecting tube 696 connects the auxiliary air tube 692 with the return tube 673, so that the gas generated during the return process can be discharged through the auxiliary air tube 692, forming a closed loop of "drug administration - return pressure relief - exhaust", which can effectively avoid damage caused by excessive pipeline pressure, and at the same time, timely discharge of gas in the pipeline reduces the risk of air embolism caused by air bubbles mixed with drug, thereby improving the basic safety and stability of chemotherapy administration.

[0053] In the description of this invention, only preferred embodiments are described, but the scope of protection of this invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, should be covered within the scope of protection of this invention.

Claims

1. An anti-extravasation chemotherapy delivery device for oncology, comprising a movable rod (1), characterized in that: A support rod (3) is fixedly installed at the top of the moving rod (1). A drug administration bottle (4) is provided on one side of the support rod (3). An infusion mechanism (6) constituting a gas-liquid pressure self-balancing system is provided at the bottom of the drug administration bottle (4). The infusion mechanism (6) includes an injection head (61) inserted into the mouth of the drug administration bottle (4). A first connecting block (64) is provided on the injection head (61). An infusion tube (68) is connected to the free end of the injection head (61). A reflux assembly (67) is provided on the infusion tube (68). The reflux assembly (67) includes a second connecting block provided on the infusion tube (68). 674), a return tube (673) is installed between the first connecting block (64) and the second connecting block (674), and an exhaust assembly (69) is provided on the outside of the infusion tube (68). The exhaust assembly (69) includes an auxiliary air tube (692) inserted into the mouth of the administration bottle (4), and an air bag (691) is provided at the free end of the auxiliary air tube (692). A membrane (695) for air permeability and water resistance is provided on the auxiliary air tube (692). A pneumatic connecting tube (696) is installed between one end of the auxiliary air tube (692) and the slow flow chamber (6721) where the return tube (673) is located.

2. The oncology chemotherapy administration device for preventing extravasation as described in claim 1, characterized in that: Two pressure plates (694) are installed on the pneumatic connecting pipe (696), and the membrane (695) is located between the two pressure plates (694). The top of the moving rod (1) is fixedly installed with a mounting plate (2), and a fixing frame (693) is fixedly installed on one side of the mounting plate (2), and the auxiliary air pipe (692) is snapped into the fixing frame (693).

3. The oncology chemotherapy administration device for preventing extravasation according to claim 1, characterized in that: The inner wall of the auxiliary air tube (692) is provided with a spiral groove (697), and a filter rod (698) is provided inside the auxiliary air tube (692), and multiple air holes are provided on the outer surface of the filter rod (698).

4. The oncology chemotherapy administration device for preventing extravasation according to claim 1, characterized in that: The injection head (61) is provided with a throttling ring (63) for controlling the flow of liquid in the infusion tube (68), and a drug delivery tube (62) is connected to one side of the first connecting block (64), and a piston is provided at the free end of the drug delivery tube (62).

5. The anti-extravasation chemotherapy delivery device for oncology according to claim 1, characterized in that: A one-way valve (671) is provided between the return pipe (673) and the first connecting block (64). Multiple fixing plates (679) are fixedly installed inside the second connecting block (674). A sealing plate (6710) for sealing the infusion tube (68) is rotatably installed on the top of the fixing plate (679). A second gear (678) is fixedly installed inside the second connecting block (674) and is fixedly connected to the sealing plate (6710). A third connecting block (676) is fixedly installed on one side of the second connecting block (674). A first gear (677) is rotatably installed inside the third connecting block (676) and meshes with the second gear (678). A driving component (675) is fixedly installed on the top of the third connecting block (676) and the output shaft of the driving component (675) is fixedly connected to the first gear (677).

6. The oncology chemotherapy administration device for preventing extravasation according to claim 1, characterized in that: The return pipe (673) is provided with a flow-slowing component (672), the flow-slowing component (672) includes a flow-slowing cavity (6721) connected to the return pipe (673), a honeycomb support (6723) is installed inside the flow-slowing cavity (6721), and a buffer bladder (6722) for buffering the medicine is installed in the middle of the honeycomb support (6723) through multiple support balls (6725).

7. The oncology chemotherapy administration device for preventing extravasation according to claim 6, characterized in that: The buffer bladder (6722) has a flow guide (6724) arranged along the axial direction of the bladder body to reduce the turbulence of the drug solution. The flow guide (6724) includes multiple flexible silicone micro-flow limiting valves installed on the outside that can automatically adjust the opening degree according to the pressure.

8. The anti-extravasation chemotherapy delivery device for oncology according to claim 1, characterized in that: The infusion tube (68) is provided with a collection tube (66) for temporarily storing the medicine solution, and a guide elbow (65) for slowing down the flow of liquid is provided at one end of the collection tube (66) near the injection head (61).

9. A chemotherapy administration device for preventing extravasation in oncology according to claim 1, characterized in that: A protective mechanism (7) is provided on the outside of the infusion tube (68). The protective mechanism (7) includes a circular plate (72) installed on the outer surface of the infusion tube (68). A spring (71) is fixedly installed between the second connecting block (674) and the circular plate (72). A pressure-resistant reinforcing wire (73) to reduce the deformation of the infusion tube (68) is provided on the outside of the infusion tube (68). A plurality of retaining rings (74) for stabilizing the pressure-resistant reinforcing wire (73) are installed on the outer surface of the infusion tube (68).

10. A chemotherapy administration device for preventing extravasation in oncology according to claim 1, characterized in that: The support rod (3) is provided with a stabilizing mechanism (5). The stabilizing mechanism (5) includes a support cylinder (53) fixedly installed on the support rod (3). The inside of the support cylinder (53) is fitted with a rubber inner liner plate (51) for placing the medicine bottle (4) through a locking pin (52). Multiple buffer pads (54) are fixedly installed between the inner liner plate (51) and the support cylinder (53). A connecting rope (55) is fixedly installed at the bottom of the support cylinder (53).

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