Implantable drug delivery device for oncology department

Abstract

The implantable drug delivery device for the oncology department comprises a shell, a liquid storage circular groove is formed in the shell, an injection diaphragm is connected into the liquid storage circular groove in a sliding mode, a convex ring part is arranged at the lower end of the injection diaphragm, and a suspension ring is connected to the lower end of the convex ring part; the upper end of the convex ring part is connected with a first piston ring; the upper end of the shell is connected with a shell cover, and a circular groove is formed in the shell cover; a connecting block is arranged on the side portion of the shell, and a flow limiting mechanism is arranged on the connecting block. A connector is arranged on the side of the connecting block, and the outer end of the connector is connected with an infusion tube. And a liquid outlet pipeline communicated with the liquid storage circular groove is arranged in the connector and the connecting block. According to the utility model, liquid medicine residues in the shell can be reduced, the liquid medicine is fully utilized, the structure is simple, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to an implantable drug delivery device for oncology, belonging to the technical field of implantable drug delivery. Background Art

[0002] For cancer patients, chemotherapy is a commonly used treatment method. During the treatment process, repeated puncture of blood vessels and stimulation of drugs make patients feel painful. In addition, the venous conditions of patients with advanced cancer are not good, and venous access cannot be guaranteed, which increases the difficulty of operation for medical staff. In this case, an implantable drug delivery device will be chosen to deliver drugs to patients. For example, the Chinese utility model patent with authorization announcement number CN213131264U discloses an anti-blocking implantable drug delivery device, and specifically discloses a catheter for insertion into a blood vessel, the catheter includes an outer tube and an inner tube that are not connected to each other, the outer tube has a portion that is outer-mounted on the inner tube, the portion of the outer tube that is outer-mounted on the inner tube has an outer outlet that is connected to the blood vessel, and the space between the outer tube and the inner tube is connected to the outer outlet, the implantable drug delivery device includes a balloon, the balloon is located between the inner tube and the outer tube, the balloon is only connected to the inner tube, the balloon can be filled with liquid in the inner tube and expand to block the outer outlet, and when the liquid in the inner tube is withdrawn, the balloon collapses to open the outer outlet. However, this solution may cause the liquid medicine in the port to not be injected into the patient's body as much as possible. In addition, because the port is implanted in the human body, the liquid medicine has a certain temperature. If the liquid medicine remains in the port for a long time, the medicine may deteriorate, thereby aggravating the patient's condition. Utility Model Content

[0003] The purpose of the utility model is to provide an implantable drug delivery device for oncology, which can reduce the amount of drug liquid remaining in the housing, allowing the drug liquid to be fully utilized, and has a simple structure and is easy to operate.

[0004] The technical solution of the utility model is as follows: an implantable drug delivery device for oncology, comprising a shell, a liquid storage groove inside the shell, an injection diaphragm slidably connected to the liquid storage groove, a convex ring portion provided at the lower end of the injection diaphragm, and a suspension ring connected to the lower end of the convex ring portion; a first piston ring is connected to the upper end of the convex ring portion; a shell cover is connected to the upper end of the shell, and a circular groove is provided on the shell cover; a connecting block is provided on the side of the shell, and a flow limiting mechanism is provided on the connecting block; a connecting head is provided on the side of the connecting block, and an infusion tube is connected to the outer end of the connecting head; a liquid outlet pipe connected to the liquid storage groove is provided in the connecting head and the connecting block.

[0005] The above-mentioned implantable drug delivery device for oncology, the flow limiting mechanism includes a sliding groove arranged in the connecting block, the sliding groove is perpendicular to the liquid outlet pipe; a flow limiting column is slidably connected in the sliding groove, the upper end of the flow limiting column is provided with a column cap, the lower end of the column cap is connected to a spring, the other end of the spring is connected to the upper end of the connecting block; the spring surrounds the outside of the flow limiting column.

[0006] In the aforementioned implantable drug delivery device for oncology, the outer end of the flow-limiting column is connected to a second piston ring, and the second piston ring is located between the flow-limiting column and the spring.

[0007] In the aforementioned implantable drug delivery device for oncology, a rubber membrane is connected between the lower side of the column cap and the upper side of the connecting block.

[0008] The aforementioned implantable drug delivery device for oncology, wherein the shell comprises a triangular bottom, the upper end of which is connected to a cylindrical portion.

[0009] In the aforementioned implantable drug delivery device for oncology, the upper end of the cylindrical portion is provided with a first thread; the inner side wall of the lower end of the shell cover is provided with a second thread, and the second thread is screwed together with the first thread.

[0010] In the aforementioned implantable drug delivery device for oncology, the lower end surface of the suspension ring is lower than the lower end surface of the injection diaphragm to form an injection cavity; and the outer diameter of the first piston ring is larger than the outer diameter of the convex ring portion.

[0011] The aforementioned implantable drug delivery device for oncology has a one-way valve provided in the infusion tube, and the flow direction of the one-way valve is from the connector to the patient's vein.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The utility model uses a non-destructive needle to penetrate the injection diaphragm and inject the medicine into the liquid storage groove. As the medicine is injected, the suspension ring lifts the injection diaphragm due to buoyancy, and at the same time, the medicine flows through the outlet pipe to the connector, and then flows into the patient's body through the infusion tube. When the medicine is to be completely squeezed out, the patient lies flat. At this time, the injection diaphragm exerts a downward pressure on the medicine due to gravity, thereby squeezing the medicine out of the liquid storage groove and reducing the residual medicine. The first piston ring is used to prevent the medicine from leaking out of the gap between the liquid storage groove and the injection diaphragm during the lifting and lowering process of the injection diaphragm. During the drug administration process, if the patient feels uncomfortable, the flow limiting mechanism can reduce the drug administration speed to relieve the patient's discomfort.

[0014] 2. The flow-limiting mechanism of the present invention can limit the speed of drug administration. When the patient feels uncomfortable, by pressing the column cap, the flow-limiting column is inserted into the liquid outlet pipe along the sliding groove. The effective blocking length of the flow-limiting column is controlled by the pressing force to change the drug administration speed. After the patient's discomfort is eliminated, the pressure on the column cap is canceled, and the spring rebounds so that the flow-limiting column is no longer inserted into the liquid outlet pipe, allowing the drug liquid to circulate normally. The second piston ring is used to prevent the drug liquid from leaking out of the gap between the flow-limiting column and the sliding groove during the sliding process of the flow-limiting column. The rubber membrane is used to wrap the part of the flow-limiting column that leaks out of the connecting block and the spring to prevent these components from contacting the inside of the human body.

[0015] 3. The injection cavity of the utility model is used to ensure that the liquid medicine can be injected into the liquid storage tank. The one-way valve is used to prevent the liquid medicine from flowing back. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is an explosion diagram of the utility model;

[0018] Figure 3 It is a cross-sectional schematic diagram of the present utility model.

[0019] The marks in the accompanying drawings are: 1-shell, 2-liquid storage groove, 3-injection diaphragm, 4-convex ring, 5-suspension ring, 6-first piston ring, 7-shell cover, 8-circular groove, 9-connecting block, 10-connector, 11-infusion tube, 12-liquid outlet pipe, 13-sliding groove, 14-flow limiting column, 15-column cap, 16-spring, 17-second piston ring, 18-rubber membrane, 19-triangular bottom, 20-cylindrical part, 21-first thread, 22-second thread, 23-injection chamber, 24-one-way valve, 25-flow limiting mechanism. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0021] Example: An implantable drug delivery device for oncology, comprising: Figure 1-3 As shown, it includes a housing 1, a liquid storage tank 2 is provided in the housing 1, and the inner wall of the liquid storage tank 2 is circular and is used to store the injection liquid. Figure 2As shown, an injection diaphragm 3 is slidably connected to the liquid storage groove 2, and a convex ring portion 4 is provided at the lower end of the injection diaphragm 3. The outer wall of the convex ring portion 4 fits with the inner wall of the liquid storage groove 2. The lower end of the convex ring portion 4 is connected to a suspension ring 5. The suspension ring 5 is used to float the injection diaphragm 3 by buoyancy after the liquid is injected into the liquid storage groove 2, and the outer wall of the suspension ring 5 fits with the inner wall of the liquid storage groove 2; the upper end of the convex ring portion 4 is connected to a first piston ring 6, the outer diameter of the first piston ring 6 is larger than the outer diameter of the convex ring portion 4, so that the first piston ring 6 is in close contact with the inner wall of the liquid storage groove 2, which is used to prevent the liquid from leaking from the gap between the liquid storage groove 2 and the injection diaphragm 3 during the lifting process of the injection diaphragm 3; the upper end of the shell 1 is connected to a shell cover 7; the shell 1 includes a triangular bottom 19, the upper end of the triangular bottom 19 is connected to a cylindrical portion 20, and the cylindrical portion 2 0 has a first thread 21 at the upper end; the inner side wall of the lower end of the shell cover 7 is provided with a second thread 22, and the shell cover 7 is fixedly connected to the shell 1 by screwing the second thread 22 and the first thread 21; the shell cover 7 is provided with a circular groove 8, which is used for the injection diaphragm 3 to leak out, facilitating the injection of liquid medicine; the convex ring portion 4 of the injection diaphragm 3 is used to connect the suspension ring 5 and the first piston ring 6 while preventing the injection diaphragm 3 from slipping out of the circular groove 8; the side of the shell 1 is provided with a connecting block 9, and the connecting block 9 is provided with a flow limiting mechanism 25; the side of the connecting block 9 is provided with a connector 10, and the outer end of the connector 10 is connected to an infusion tube 11, which is used to be connected to the patient's vein; the connector 10 and the connecting block 9 are provided with a liquid outlet pipe 12 connected to the liquid storage circular groove 2, and the liquid outlet pipe 12 is connected to the inside of the infusion tube 11. A one-way valve 24 is provided within the infusion tube 11. The flow direction of the one-way valve 24 is from the connector 10 to the patient's vein, and the one-way valve 24 is used to prevent the backflow of the liquid medicine. The lower end surface of the suspension ring 5 is lower than the lower end surface of the injection diaphragm 3, forming an injection cavity 23. The injection cavity 23 is used to ensure that the liquid medicine can be injected into the liquid reservoir 2.

[0022] Preferably, if Figure 2 As shown in Figure 3, the flow limiting mechanism 25 includes a sliding groove 13 provided in the connecting block 9, the sliding groove 13 being perpendicular to the liquid outlet pipe 12; a flow limiting column 14 is slidably connected in the sliding groove 13, a column cap 15 is provided at the upper end of the flow limiting column 14, a spring 16 is connected at the lower end of the column cap 15, and the other end of the spring 16 is connected to the upper end of the connecting block 9; the spring 16 surrounds the outside of the flow limiting column 14. A second piston ring 17 is connected to the outer end of the flow limiting column 14, the second piston ring 17 is located between the flow limiting column 14 and the spring 16, and the second piston ring 17 is used to prevent the liquid from leaking out of the gap between the flow limiting column 14 and the sliding groove 13 during the sliding process of the flow limiting column 14. A rubber membrane 18 is connected between the lower end side of the column cap 15 and the upper end side of the connecting block 9, and the rubber membrane 18 is used to wrap the part of the flow limiting column 14 that leaks out of the connecting block 9 and the spring 16 to prevent these components from contacting the human body.

[0023] How it works

[0024] The liquid medicine is injected into the liquid storage tank 2 through the injection diaphragm 3 through a non-destructive needle. As the liquid medicine is injected, the suspension ring 5 lifts the injection diaphragm 3 due to buoyancy. At the same time, the liquid medicine flows through the liquid outlet pipe 12 to the connector 10, and then flows into the patient's body through the infusion tube 11. When the liquid medicine is to be completely squeezed out, the patient lies flat. At this time, the injection diaphragm 3 exerts a downward force on the liquid medicine due to gravity, thereby squeezing the liquid medicine out of the liquid storage tank 2 and reducing the residual liquid medicine. During the drug administration process, if the patient feels uncomfortable, by pressing the column cap 15 of the flow limiting mechanism 25, the flow limiting column 14 is inserted into the liquid outlet pipe 12 along the sliding groove 13. The effective blocking length of the flow limiting column 14 is controlled by the pressing force to change the drug administration speed. After the patient's discomfort is eliminated, the pressure on the column cap 15 is canceled, and the spring 16 rebounds so that the flow limiting column 14 is no longer inserted into the liquid outlet pipe 12, allowing the liquid medicine to circulate normally, which can reduce the drug administration speed and alleviate the patient's discomfort. Alternatively, when injecting the medicine into the liquid reservoir 2 , the column cap 15 may be pressed to block the liquid outlet pipe 12 so that all the medicine is first injected into the liquid reservoir 2 , and then the column cap 15 may be released to allow the medicine to slowly flow into the patient's body.

Claims

1. An implantable drug delivery device for oncology, characterized in that: The invention comprises a shell (1), wherein the shell (1) has a liquid storage groove (2), an injection diaphragm (3) is slidably connected to the liquid storage groove (2), a convex ring portion (4) is provided at the lower end of the injection diaphragm (3), and the lower end of the convex ring portion (4) is connected to a suspension ring (5); the upper end of the convex ring portion (4) is connected to a first piston ring (6); the upper end of the shell (1) is connected to a shell cover (7), and the shell cover (7) is provided with a circular groove (8); the side of the shell (1) is provided with a connecting block (9), and the connecting block (9) is provided with a flow limiting mechanism (25); the side of the connecting block (9) is provided with a connecting head (10), and the outer end of the connecting head (10) is connected to a liquid infusion tube (11); the connecting head (10) and the connecting block (9) are provided with a liquid outlet pipe (12) connected to the liquid storage groove (2).

2. The implantable drug delivery device for oncology according to claim 1, characterized in that: The flow limiting mechanism (25) comprises a sliding groove (13) arranged in the connecting block (9), the sliding groove (13) being perpendicular to the liquid outlet pipe (12); a flow limiting column (14) is slidably connected in the sliding groove (13), a column cap (15) is provided at the upper end of the flow limiting column (14), a spring (16) is connected at the lower end of the column cap (15), and the other end of the spring (16) is connected to the upper end of the connecting block (9); the spring (16) surrounds the outer side of the flow limiting column (14).

3. The implantable drug delivery device for oncology according to claim 2, characterized in that: The outer end of the flow-limiting column (14) is connected to a second piston ring (17), and the second piston ring (17) is located between the flow-limiting column (14) and the spring (16).

4. The implantable drug delivery device for oncology according to claim 2, characterized in that: A rubber membrane (18) is connected between the lower end side of the column cap (15) and the upper end side of the connecting block (9).

5. The implantable drug delivery device for oncology according to claim 1, characterized in that: The housing (1) comprises a triangular bottom (19), and the upper end of the triangular bottom (19) is connected to a cylindrical portion (20).

6. The implantable drug delivery device for oncology according to claim 5, characterized in that: The upper end of the cylindrical portion (20) is provided with a first thread (21); the inner side wall of the lower end of the shell cover (7) is provided with a second thread (22), and the second thread (22) and the first thread (21) are screwed together.

7. The implantable drug delivery device for oncology according to claim 1, characterized in that: The lower end surface of the suspension ring (5) is lower than the lower end surface of the injection diaphragm (3) to form an injection cavity (23); the outer diameter of the first piston ring (6) is larger than the outer diameter of the convex ring portion (4).

8. The implantable drug delivery device for oncology according to claim 1, characterized in that: A one-way valve (24) is provided in the infusion tube (11), and the flow direction of the one-way valve (24) is from the connector (10) to the patient's vein.

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