Drug delivery device for medical oncology

Abstract

The utility model relates to the technical field of medicine administration in the medical oncology, and discloses a medicine administration device for the medical oncology, which comprises a medicine administration cylinder, a piston rod and a medicine delivery pipe, and is characterized in that a piston rod is slidably connected in an inner cavity of the medicine administration cylinder; the dosing mechanism is arranged on the surface of the dosing cylinder and comprises two driven blocks fixedly connected to one end of the piston rod, two fixing rods are fixedly connected to the surface of the dosing cylinder, the inner walls of the driven blocks are slidably connected to the surfaces of the fixing rods, a limiting ring is arranged on the surface of the dosing cylinder, and a lead screw is rotationally connected to the top of the limiting ring; through the lead screw and the driven block, the bottom of the fixing frame abuts against the surface of the fixing rod, the limiting ring is located on the surface of the dosing cylinder, then the pushing position of the piston rod is limited, the dosing cylinder conveys liquid medicine to the vein of a patient quantitatively or slightly, the liquid medicine is prevented from being left in the dosing cylinder, and the treatment effect on the tumor patient is guaranteed; the problems that in the prior art, the dosing accuracy is poor, and liquid medicine cannot be effectively prevented from remaining in the dosing cylinder are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oncology drug administration, and in particular relates to an oncology drug administration device. Background Art

[0002] In the field of medical device technology, especially in oncology treatment, the accuracy and efficiency of drug delivery devices are crucial to patient treatment outcomes. Traditional drug delivery methods, such as manual syringes or simple infusion pumps, while able to meet drug delivery needs to a certain extent, become limited when dealing with drugs that require extremely precise dosage control. These limitations are mainly reflected in the following aspects:

[0003] 1. Inaccurate dosage control: Manual syringes rely on the operator's skills and are difficult to achieve precise control of tiny doses. Especially when continuous drug administration is required, the drug administration rate is difficult to maintain a stable state, which can easily lead to overdose or underdose, affecting the treatment effect.

[0004] 2. Complex operation and prone to errors: During the drug administration process, the operator needs to frequently adjust the drug dosage and administration rate, which not only increases the complexity of the operation, but also increases the risk of human error, posing a threat to patient safety.

[0005] 3. Drug side effects: Due to imprecise dosage control, patients may suffer from unnecessary drug side effects. In the long run, this not only affects the treatment effect but may also cause additional harm to the patient's health.

[0006] Therefore, the present invention designs a drug delivery device for oncology to solve the problems existing in the above-mentioned prior art, achieve precise control of drug delivery during tumor drug delivery and avoid drug liquid residue. Utility Model Content

[0007] (1) Technical problems solved

[0008] In response to the shortcomings of the existing technology, the utility model provides an oncology drug delivery device, which has the advantages of being able to achieve accurate and quantitative drug delivery and avoid drug liquid residue in the delivery tube, solving the problems of poor drug delivery accuracy and the inability to effectively prevent drug liquid from remaining in the delivery tube in the existing technology.

[0009] (2) Technical solution

[0010] In order to achieve the above-mentioned purpose of avoiding liquid medicine residue in the drug delivery barrel and achieving accurate drug delivery, the present utility model provides the following technical solutions:

[0011] A drug delivery device for oncology.

[0012] As a preferred embodiment of the oncology drug delivery device of the present invention, the device comprises: a drug delivery cylinder, wherein a piston rod is slidably connected to the inner cavity of the drug delivery cylinder; a drug delivery mechanism is arranged on the outer surface of the drug delivery cylinder, comprising: a fixed rod symmetrically arranged on the outer side of the drug delivery cylinder; a limiting ring movably arranged on the outer side of the drug delivery cylinder, and a positioning assembly is arranged on the limiting ring, wherein the positioning assembly matches the fixed rod; a driven block is fixedly arranged at one end of the piston rod and slidably connected to the fixed rod;

[0013] The positioning assembly includes a screw rod, which is threadedly connected to the top of the limiting ring, and a fixing bracket is threadedly connected to the surface of the screw rod, and the fixing bracket is slidably connected to the limiting ring and matches the fixing rod;

[0014] Based on the above technical features: through the setting of the screw rod and the driven block, the bottom of the fixed frame is pressed against the surface of the fixed rod, so that the limit ring is positioned on the surface of the dosing barrel, and then the pushing position of the piston rod is restricted, so that the dosing barrel can deliver the medicine to the patient's vein in a quantitative or trace amount, and realize the precise control of the injection volume during the drug administration process, ensuring the therapeutic effect on tumor patients; through the setting of the fixed rod, the driven rod and the screw rod, it can play a guiding role, avoiding the rotation of the piston rod and the piston during use, so as to ensure that the medicine in the dosing barrel can be completely discharged, avoiding the problem of medicine remaining in the dosing barrel, and ensuring the practicality of the drug administration device.

[0015] As a preferred solution of the oncology medication device of the present invention: the upper end of the surface of the fixing rod is provided with positioning grooves distributed in equal rows, and the bottom of the fixing frame is provided with a positioning rod, and the positioning rod matches the positioning groove;

[0016] The lower end of the surface of the fixing frame is curved into an arc shape, and the positioning rod is arranged at the lower end of the fixing frame;

[0017] Based on the above technical features: by adjusting the positioning rod in the positioning groove at different positions, the position of the limit ring can be adjusted so as to control the quantitative drug feeding of the piston rod.

[0018] As a preferred solution of the oncology medication device of the utility model: the liquid outlet end of the medication cylinder is provided with a liquid outlet tube, and one end of the piston rod is provided with a liquid pushing block;

[0019] The surface of the liquid outlet pipe is funnel-shaped, and the surface of the liquid pushing block is a truncated cone structure that matches the shape of the liquid outlet pipe;

[0020] Based on the above technical features: the movement of the piston rod drives the liquid pushing block to move on the inner wall of the dosing barrel, so that the liquid in the dosing barrel is transported into the patient's body through the liquid outlet tube. Because the surface of the liquid outlet tube is funnel-shaped and the surface of the liquid pushing block is frustum-shaped, the surface of the liquid pushing block matches the inner surface of the liquid outlet tube, so that all the liquid in the dosing barrel can be injected into the patient's body.

[0021] As a preferred solution of the oncology medication device of the present invention: a guide rod is provided at one end of the medication barrel, and the limiting ring is slidably connected to the guide rod;

[0022] Based on the above technical features: through the provision of the guide rod, the limiting ring can be guided when the position of the limiting ring is adjusted.

[0023] (3) Beneficial effects

[0024] Compared with the prior art, the present invention provides a drug delivery device for oncology, which has the following features:

[0025] Beneficial effects:

[0026] 1. Through the arrangement of the screw rod and the driven block, the bottom of the fixing frame is pressed against the surface of the fixing rod, so that the limit ring is positioned on the surface of the drug delivery cartridge, thereby limiting the pushing position of the piston rod. This enables the drug delivery cartridge to deliver a quantitative or micro-amount of liquid medicine to the patient's vein, achieving precise control of the injection volume during the drug delivery process and ensuring the therapeutic effect on cancer patients.

[0027] 2. The arrangement of the fixed rod, the driven rod and the screw rod can play a guiding role, thereby preventing the piston rod and the piston from rotating during use, so as to ensure that all the liquid medicine in the dosing barrel can be discharged, avoiding the problem of liquid medicine remaining in the dosing barrel, and ensuring the practicality of the dosing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of the oncology drug delivery device of the present invention;

[0029] Figure 2 This is a cross-sectional view of the drug delivery cartridge of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the drug delivery mechanism of the utility model;

[0031] Figure 4 For this utility model Figure 3 A partial enlarged view of point A in the middle;

[0032] Figure 5 It is a structural schematic diagram of the fixing frame of the utility model.

[0033] In the figure: 1. Dosing cartridge; 2. Piston rod; 3. Dosing mechanism; 31. Fixed rod; 32. Limiting ring; 33. Follower block; 34. Positioning rod; 35. Positioning groove; 36. Screw; 37. Liquid outlet pipe; 38. Liquid push block; 39. Guide rod; 310. Fixed frame. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0036] An oncology drug delivery device, comprising:

[0037] A drug delivery cartridge 1 is provided, wherein a piston rod 2 is slidably connected to an inner cavity of the drug delivery cartridge 1;

[0038] The dosing mechanism 3 is arranged on the surface of the dosing barrel 1 and includes a fixing rod 31, a limiting ring 32 and a driven block 33;

[0039] The fixing rod 31 is symmetrically arranged on the surface of the drug delivery barrel 1;

[0040] The limiting ring 32 is provided on the outer surface of the drug delivery barrel 1, and a positioning assembly is provided on the limiting ring 32, and the positioning assembly matches the fixing rod 31;

[0041] The driven block 33 is fixedly connected to one end of the piston rod 2, there are two of them, and they are slidably connected to the fixed rod 31;

[0042] The positioning assembly includes a screw rod 36, which is threadedly arranged on the top of the limiting ring 32, and a fixing bracket 310 is threadedly connected to the surface of the screw rod 36. The fixing bracket 310 is slidably connected to the limiting ring 32. The lower end of the surface of the fixing bracket 310 is curved in an arc shape and is used in conjunction with the fixing rod 31.

[0043] In this embodiment, when a tumor patient needs to receive medication treatment, the medicine for treating the tumor is drawn into the inside of the medication barrel 1 through the piston rod 2. At this time, the needle is installed at the liquid outlet end of the medication barrel 1, and the limit ring 32 is pushed to the corresponding position. The screw rod 36 is rotated, and the screw rod 36 rotates to drive the fixing frame 310 to press against the surface of the fixing rod 31, so that the limit ring 32 is positioned on the fixing rod 31; then the needle on the medication barrel 1 is inserted into the patient's vein, and the piston rod 2 is pushed. The piston rod 2 pushes the medicine in the medication barrel 1 to the patient's vein. The piston rod 2 moves and drives the driven block 33 to contact one side of the limit ring 32, and the piston rod 2 is stopped, completing the quantitative medication; according to the above process, the medication barrel 1 delivers a quantitative or trace amount of medicine to the patient's body, the needle in the patient's body is pulled out, and the medical sponge is placed on the patient's skin punctured, thereby completing the medication treatment process.

[0044] As a preferred embodiment, Figure 2 As shown, the injection end of the dosing barrel 1 is fixedly connected to a liquid outlet tube 37, and one end of the piston rod 2 is fixedly connected to a liquid pushing block 38. The surface of the liquid outlet tube 37 is funnel-shaped, and the surface of the liquid pushing block 38 is truncated cone-shaped. The surface of the liquid pushing block 38 and one end of the surface of the piston rod 2 are both rubber components. One end of the surface of the piston rod 2 is tightly attached to the inner wall of the dosing barrel 1, and the end of the surface of the liquid pushing block 38 close to the liquid pushing block 38 is tightly attached to the inner wall of the dosing barrel 1.

[0045] In this embodiment, the movement of the piston rod 2 drives the liquid pushing block 38 to move on the inner wall of the dosing barrel 1, so that the liquid in the dosing barrel 1 is transported into the patient's body through the liquid outlet tube 37. Because the surface of the liquid outlet tube 37 is funnel-shaped and the surface of the liquid pushing block 38 is frustum-shaped, the surface of the liquid pushing block 38 matches the inner surface of the liquid outlet tube 37, so that all the liquid in the dosing barrel 1 can be injected into the patient's body.

[0046] As a preferred embodiment, Figure 4 and Figure 5 As shown, the upper end of the surface of the fixing rod 31 is further provided with positioning grooves 35 distributed in an equal row, and the bottom of the fixing frame 310 is fixedly connected to two positioning rods 34, which are used in conjunction with any positioning groove 35, and one end of the surface of the fixing rod 31 and the surface of the positioning rod 34 are both truncated cone-shaped;

[0047] In this embodiment, the position of the limiting ring 32 is adjusted by adjusting the positioning rod 34 in the positioning groove 35 at different positions, so as to control the quantitative drug feeding of the piston rod 2.

[0048] As a preferred embodiment, Figure 4 As shown, one end of the drug delivery barrel 1 is fixedly connected to two guide rods 39, and the limiting ring 32 is slidably connected to the surface of the guide rods 39;

[0049] In this embodiment, the guide rod 39 is provided to guide the limiting ring 32 when the position of the limiting ring 32 is adjusted.

[0050] When the oncology medication device of the present invention is in use: the drug solution for treating tumors is drawn into the medication barrel 1 through the piston rod 2. At this time, the needle is installed at the liquid outlet end of the medication barrel 1, and the limiting ring 32 is pushed to the corresponding position on the surface of the guide rod 39. The screw rod 36 is rotated. The screw rod 36 rotates and drives the fixing frame 310 to press against the surface of the fixing rod 31. The fixing frame 310 moves downward and drives the positioning rod 34 to be stuck in the corresponding positioning groove 35, so that the limiting ring 32 is positioned on the fixing rod 31. The needle on the medication barrel 1 is inserted into the patient's vein, and the piston rod 2 is pushed. The piston rod 2 and the liquid pushing block 38 push the drug solution in the medication barrel 1 to the patient's vein. The piston rod 2 moves and drives the driven block 33 to abut against one end of the limiting ring 32, and the piston rod 2 stops pushing. The quantitative medication of the drug solution for treating tumors is completed.

[0051] According to the above process, the drug delivery cartridge 1 delivers a quantitative or trace amount of liquid medicine into the patient's body. Because the surface of the liquid outlet tube 37 is funnel-shaped and the surface of the liquid pushing block 38 is truncated cone-shaped, the surface of the liquid pushing block 38 matches the inner surface of the liquid outlet tube 37, so that the liquid medicine in the drug delivery cartridge 1 can be completely injected into the patient's body. After the liquid medicine in the drug delivery cartridge 1 is completely injected into the patient's body, the needle in the patient's body is pulled out and the medical sponge is placed on the patient's skin puncture site to complete the drug delivery treatment.

[0052] It should be noted that the drug cartridge 1 and the piston rod 2 mentioned above are all relatively mature devices in existing technology. The specific models can be selected according to actual needs and will not be described in detail here.

[0053] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0054] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drug delivery device for oncology, characterized in that: include: A drug delivery cartridge (1), wherein a piston rod (2) is slidably connected to an inner cavity of the drug delivery cartridge (1); The dosing mechanism (3) is arranged on the outer surface of the dosing barrel (1) and comprises: A fixing rod (31) is symmetrically arranged outside the drug delivery barrel (1); A limiting ring (32) is movably arranged on the outside of the drug delivery barrel (1), and a positioning assembly is arranged on the limiting ring (32), and the positioning assembly matches the fixing rod (31); A driven block (33) is fixedly arranged at one end of the piston rod (2) and is slidably connected to the fixed rod (31); The positioning assembly includes a screw rod (36), the screw rod (36) is threadedly connected to the top of the limiting ring (32), and a fixing frame (310) is threadedly connected to the surface of the screw rod (36), and the fixing frame (310) is slidably connected to the limiting ring (32) and matched with the fixing rod (31).

2. The oncology medication device according to claim 1, characterized in that: The upper end of the surface of the fixing rod (31) is provided with positioning grooves (35) distributed in equal rows, and the bottom of the fixing frame (310) is provided with a positioning rod (34), and the positioning rod (34) matches the positioning groove (35).

3. The oncology medication device according to claim 1, characterized in that: The lower end of the surface of the fixing frame (310) is curved into an arc shape, and the positioning rod (34) is arranged at the lower end of the fixing frame (310).

4. The oncology medication device according to claim 1, characterized in that: The liquid outlet end of the drug delivery cylinder (1) is provided with a liquid outlet pipe (37), and one end of the piston rod (2) is provided with a liquid pushing block (38).

5. The oncology medication device according to claim 4, characterized in that: The surface of the liquid outlet pipe (37) is funnel-shaped, and the surface of the liquid pushing block (38) is a truncated cone structure that matches the shape of the liquid outlet pipe (37).

6. The oncology medication device according to claim 1, characterized in that: A guide rod (39) is provided at one end of the medication barrel (1), and the limiting ring (32) is slidably connected to the guide rod (39).

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