An anorectal applicator

Abstract

An anus and intestine administration device comprises a needle tube, a piston assembly and an administration head, the piston assembly is slidingly installed in the needle tube, the administration head is detachably installed on the needle tube, the administration head is used for containing liquid medicine or fixing solid medicine at the end of the administration head, the liquid medicine in the administration head or the solid medicine fixed on the administration head is driven by the piston assembly to be output from the administration head, so that the liquid medicine or the solid medicine is administered into the rectum of a patient, and the convenience of medical staff in administering the rectum is improved.

Description

Technical Field

[0001] This utility model belongs to the field of syringe technology, specifically relating to an anorectal drug delivery device. Background Technology

[0002] Rectal administration is a method of drug delivery that involves placing medication into the body through the anus. This method is typically suitable for patients who cannot take oral medications or for situations requiring rapid drug efficacy. Rectal administration involves directly inserting the medication into the rectum through the anus, where it dissolves and is absorbed. This method is suitable for some liquid medications or suppositories, such as antipyretic suppositories and anti-inflammatory suppositories. For suppositories (solid medications), they are usually inserted into the rectum with a finger. For liquid medications, they are usually injected into the rectum using a syringe. Currently, commercially available rectal medication delivery devices cannot simultaneously administer both liquid and solid medications, causing inconvenience for healthcare professionals when administering medications rectally. Summary of the Invention

[0003] To address the above shortcomings, the technical problem to be solved by this utility model is to provide a rectal medication delivery device that can simultaneously push solid or liquid medications into the patient's rectum.

[0004] To solve the above technical problems, the technical solution adopted by this utility model is as follows:

[0005] An anorectal drug delivery device for delivering solid or liquid medication into a patient's anorectal region includes a needle, a piston assembly, and a delivery head. The piston assembly is slidably mounted inside the needle, and the delivery head is detachably mounted on the needle. The piston assembly drives the solid or liquid medication in the delivery head to exit the delivery head. The piston assembly includes a push piston and a push rod. The push piston is slidably mounted inside the needle and pushes out the liquid medication in the delivery head. The push rod is slidably mounted inside the push piston and pushes out the solid medication on the delivery head.

[0006] As a preferred embodiment of this utility model, the top drug rod is provided with a sealing gasket, and a sealing hole is provided in the drug pushing piston. The top drug rod and the drug pushing piston are sealed and connected by the sealing gasket and the sealing hole.

[0007] In a preferred embodiment of this utility model, the sealing hole is conical, and the shape of the sealing gasket is adapted to the shape of the sealing hole.

[0008] As a preferred embodiment of this utility model, the drug-push piston includes a piston head slidably installed inside the needle tube and a push rod fixed to the piston head. The push rod is provided with a guide hole, the drug-push rod is slidably connected to the guide hole, and a sealing hole is provided at the end of the piston head.

[0009] As a preferred embodiment of this utility model, a return spring is provided between the top medicine rod and the push rod, and the return spring applies a force toward the sealing hole to the top medicine rod.

[0010] As a preferred embodiment of this utility model, the guide hole is a stepped hole, and the top medicine rod is provided with a limiting piece arranged in the guide hole. The return spring abuts against the step and the limiting piece of the guide hole respectively.

[0011] As a preferred embodiment of this utility model, the end of the push rod is provided with a support plate, and the end of the top drug rod is provided with a push plate. The push plate and the support plate are detachably connected. When the push plate and the support plate are connected, the top drug rod and the push drug piston move simultaneously. When the push plate and the support plate are separated, the top drug rod moves relative to the push drug piston.

[0012] As a preferred embodiment of this utility model, the needle tube is provided with a support step, which is adapted to the drug-pushing piston to drive the top drug rod to slide relative to the drug-pushing piston.

[0013] As a preferred embodiment of this utility model, the needle tube is provided with a connector, the drug delivery head is installed on the needle tube through the connector, and the drug delivery rod extends into the drug delivery head through the connector.

[0014] As a preferred embodiment of this utility model, the drug delivery head is provided with a receiving cavity for containing liquid drugs, and a conical opening for fixing solid drugs is provided at the end of the receiving cavity.

[0015] The beneficial effects of this utility model are: (1) Compared with a single liquid drug delivery device, this rectal drug delivery device can deliver liquid or solid drugs into the rectum of the patient, thereby increasing the applicability of the drug delivery device and improving the convenience of drug delivery for medical staff.

[0016] (2) The connection between the push rod and the push piston is sealed by the sealing gasket and sealing hole, so that when the push rod and the push piston move at the same time, the liquid drug in the drug head can be pushed out of the drug head.

[0017] (3) By connecting or separating the push plate and the support plate, the push piston and the push rod can be connected or separated, so that when the push piston and the push rod are connected, liquid drugs are pushed into the patient's anus and rectum, and when the push piston and the push rod are connected, solid drugs are pushed into the patient's anus and rectum. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this rectal medication device.

[0019] Figure 2 This is a cross-sectional view of the rectal medication device.

[0020] Figure 3 This is a schematic diagram of the piston assembly.

[0021] Figure 4 This is a schematic diagram of the structure of the top-mounted drug rod.

[0022] Figure 5 This is a schematic diagram of the structure of the drug-propelling piston.

[0023] Reference numerals: needle tube 1, support step 1-1, connector 1-2, drug delivery head 2, receiving cavity 2-1, conical opening 2-2, drug delivery piston 3, sealing hole 3-1, piston head 3-2, push rod 3-3, guide hole 3-4, support piece 3-5, drug delivery rod 4, sealing gasket 4-1, limiting piece 4-2, push piece 4-3, return spring 5. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] An anorectal drug delivery device includes a needle tube 1, a piston assembly, and a delivery head 2. The piston assembly is slidably installed inside the needle tube 1, and the delivery head 2 is detachably installed on the needle tube 1. The delivery head 2 is used to contain liquid drugs or fix solid drugs at its end. The piston assembly drives the liquid drugs in the delivery head 2 or the solid drugs fixed on the delivery head 2 to exit the delivery head 2, so as to deliver liquid or solid drugs into the patient's rectum, thereby improving the convenience of rectal drug delivery for medical staff.

[0026] The piston assembly includes a drug-push piston 3 and a drug-push rod 4. The drug-push piston 3 is slidably installed inside the syringe 1, and the liquid drug in the drug delivery head 2 is pushed out by the drug-push piston 3. The drug-push rod 4 is slidably installed inside the drug-push piston 3, so that the drug-push rod 4 can move relative to the drug-push piston 3, thereby pushing out the solid drug at the end of the drug delivery head 2 by the drug-push rod 4.

[0027] The drug delivery piston 3 includes a piston head 3-2 that is slidably installed inside the needle tube 1 and a push rod 3-3 that is fixed on the piston head 3-2. The push rod 3-3 drives the piston head 3-3 to slide inside the needle tube 1, thereby increasing the air pressure inside the needle tube and causing the liquid drug in the drug delivery head 2 to be pushed out of the drug delivery head 2.

[0028] To facilitate the sliding installation of the push rod 4 on the push piston 3, a guide hole 3-4 is provided inside the push rod 3-3. The push rod 4 is slidably connected to the guide hole 3-4. To ensure the sealing of the push rod 4 and the push piston 3, a sealing gasket 4-1 is provided on the push rod 4, and a sealing hole 3-1 is provided at the end of the piston head 3-2. When the sealing gasket 4-1 abuts against the sealing hole 3-1, the sealing gasket 4-1 and the sealing hole 3-1 are in a sealed connection, thereby achieving a sealed state at the connection between the push rod 4 and the push piston 3. This allows the liquid drug in the administration head 2 to be pushed out of the administration head 2 when the push rod 4 and the push piston 3 move simultaneously. The sealing hole 3-1 is conical, and the shape of the sealing gasket 4-1 is adapted to the shape of the sealing hole 3-1. Preferably, the diameter of the sealing hole 3-1 decreases from the side of the administration head 2 towards the side away from the administration head 2.

[0029] A return spring 5 is provided between the top drug rod 4 and the push rod 3-3. The return spring 5 applies a force to the top drug rod 4 toward the sealing hole 3-1, ensuring that the sealing hole 3-1 abuts against the sealing gasket 4-1. To facilitate the connection between the return spring 5 and the top drug rod 4 and the push rod 3-3, the guide hole 3-4 is a stepped hole. The top drug rod 4 is provided with a limiting piece 4-2 arranged in the guide hole 3-4. The return spring 5 abuts against the step of the guide hole 3-4 and the limiting piece 4-2 respectively.

[0030] A support plate 3-5 is provided at the end of the push rod 3-3, and a push plate 4-3 is provided at the end of the push rod 4. The push plate 4-3 is detachably connected to the support plate 3-5. When the push plate 4-3 is connected to the support plate 3-5, and a force is applied to the push plate 4-3, the push rod 4 and the push piston 3 move simultaneously. When the push plate 4-3 is separated from the support plate 3-5, and a force is applied to the push plate 4-3, the push rod 4 can move relative to the push piston 3.

[0031] Rotating the push rod 4 allows the pusher 4-3 to abut against the support 3-5. Simultaneously, when the pusher 4-3 and the support 3-5 abut against each other, the sealing hole 3-1 abuts against the sealing gasket 4-1, ensuring that the piston assembly is in a sealed state, which facilitates the dispensing of liquid drugs out of the drug delivery head 2.

[0032] A support step 1-1 is provided inside the needle tube 1. The support step 1-1 is adapted to the drug-pushing piston 3. That is, the support step 1-1 is used to limit the axial displacement of the drug-pushing piston 3. When the drug-pushing piston 3 abuts against the support step 1-1, the drug-pushing piston 3 cannot move further toward the support step 1-1, thereby facilitating the driving of the push rod 4 to slide relative to the drug-pushing piston 3.

[0033] A certain distance is provided between the step surface of the supporting step 1-1 and the inner end face of the needle tube 1. When the drug-pushing piston 3 abuts against the supporting step 1-1, the sealing gasket 4-1 of the drug-push rod 4 can slide within the gap between the step surface of the supporting step 1-1 and the inner end face of the needle tube 1, thereby moving the end of the drug-push rod 4 to the opening position of the drug delivery head 2, thereby pushing the solid drug out of the drug delivery head 2. Preferably, the distance between the step surface of the supporting step 1-1 and the inner end face of the needle tube 1 is equal to the distance between the end of the drug-push rod 4 and the drug delivery head 2 under normal conditions, so as to facilitate pushing the solid drug in the drug delivery head 2 out of the drug delivery head 2.

[0034] A connector 1-2 is provided on the needle tube 1. The drug delivery head 2 is installed on the needle tube 1 through the connector 1-2. The inner diameter of the connector 1-2 is larger than the diameter of the drug delivery rod 4, so that the drug delivery rod 4 can extend into the drug delivery head 2 through the connector 1-2, thereby pushing the solid drug on the drug delivery head 2 out of the drug delivery head 2.

[0035] The administration head 2 has a receiving cavity 2-1 for containing liquid drugs, and a conical opening 2-2 for fixing solid drugs at the end of the receiving cavity 2-1. When liquid drugs need to be administered, the piston assembly creates a negative pressure state inside the needle tube 1, drawing the liquid drugs into the administration head 2. It should be noted that due to the setting of the return spring 5, when the piston assembly is operated to create a negative pressure state inside the needle tube 1, the sealing hole 3-1 and the sealing gasket 4-1 remain in contact, thereby facilitating the drawing of liquid drugs into the administration head 2. When it is necessary to fix solid drugs on the administration head 2, the solid drugs are dripped onto the conical opening 2-2 and a certain pressure is applied, thereby fixing the solid drugs in the conical opening 2-2.

[0036] The working principle of this drug delivery device is as follows:

[0037] Under normal conditions, the piston assembly abuts against the support step 1-1, and the drug delivery head 2 is installed on the needle tube 1.

[0038] When liquid medication (ointment) needs to be administered to the rectum, the push rod 4 is pulled, and the push piston 3 moves simultaneously under the action of the sealing gasket 4-1, thereby drawing the liquid medication into the administration head 2. Before administration, it is necessary to ensure that the push plate 4-3 of the push rod 4 is in contact with the support plate 3-5 of the push piston 3, that is, to ensure that the push rod 4 and the push piston 3 move simultaneously. Then, the end of the administration head 2 is inserted into the patient's anus, and the push rod 4 is pushed. The push piston 3 moves simultaneously under the action of the push rod 4, thereby pushing the liquid medication out of the administration head 2 and injecting the liquid medication into the patient's rectum.

[0039] When solid medication (suppositories) needs to be administered to the rectum, medical staff press the solid medication into the conical opening 2-2 of the administration head 2. Before administration, it is necessary to ensure that the push plate 4-3 of the push rod 4 is misaligned with the support plate 3-5 of the push piston 3, that is, to ensure that the push rod 4 can move relative to the push piston 3. Then, the end of the administration head 2 is inserted into the patient's anus, and the push rod 4 is pushed. Under the action of the support step 1-1, the piston 3 is not moved and the push rod 4 pushes the solid medication out of the administration head 2, thereby pushing the solid medication into the patient's rectum.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0041] Although this document uses many terms corresponding to the reference numerals in the figures, the possibility of using other terms is not excluded; these terms are used only to more conveniently describe and explain the essence of this utility model; interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A rectal medication delivery device for delivering solid or liquid medication into the rectum of a patient, characterized in that, The device includes a syringe (1), a piston assembly, and a drug delivery head (2). The piston assembly is slidably installed inside the syringe (1), and the drug delivery head (2) is detachably installed on the syringe (1). The piston assembly drives the liquid or solid drug in the drug delivery head (2) to be output from the drug delivery head (2). The piston assembly includes a push piston (3) and a push rod (4). The push piston (3) is slidably installed inside the syringe (1) and pushes out the liquid drug in the drug delivery head (2). The push rod (4) is slidably installed inside the push piston (3) and pushes out the solid drug on the drug delivery head (2).

2. The rectal medication applicator according to claim 1, characterized in that, The top drug rod (4) is provided with a sealing gasket (4-1), and the push drug piston (3) is provided with a sealing hole (3-1). The top drug rod (4) and the push drug piston (3) are sealed and connected by the sealing gasket (4-1) and the sealing hole (3-1).

3. The rectal medication applicator according to claim 2, characterized in that, The sealing hole (3-1) is conical, and the shape of the sealing gasket (4-1) is adapted to the shape of the sealing hole (3-1).

4. The rectal medication applicator according to claim 2, characterized in that, The drug-push piston (3) includes a piston head (3-2) slidably installed in the needle tube (1) and a push rod (3-3) fixed on the piston head (3-2). The push rod (3-3) is provided with a guide hole (3-4). The drug-push rod (4) is slidably connected to the guide hole (3-4). The sealing hole (3-1) is located at the end of the piston head (3-2).

5. A rectal medication applicator according to claim 4, characterized in that, A return spring (5) is provided between the top medicine rod (4) and the push rod (3-3), and the return spring (5) applies a force toward the sealing hole (3-1) to the top medicine rod (4).

6. The rectal medication applicator according to claim 5, characterized in that, The guide hole (3-4) is a stepped hole, and the top medicine rod (4) is provided with a limiting piece (4-2) arranged in the guide hole (3-4). The return spring (5) abuts against the step and the limiting piece (4-2) of the guide hole (3-4) respectively.

7. A rectal medication applicator according to claim 4, characterized in that, The end of the push rod (3-3) is provided with a support plate (3-5), and the end of the push rod (4) is provided with a push plate (4-3). The push plate (4-3) and the support plate (3-5) are detachably connected. When the push plate (4-3) and the support plate (3-5) are connected, the push rod (4) and the push piston (3) move simultaneously. When the push plate (4-3) and the support plate (3-5) are separated, the push rod (4) moves relative to the push piston (3).

8. The rectal medication applicator according to claim 1, characterized in that, The needle tube (1) is provided with a support step (1-1), which is adapted to the drug-pushing piston (3) to drive the push rod (4) to slide relative to the drug-pushing piston (3).

9. A rectal medication applicator according to claim 1, characterized in that, The needle tube (1) is provided with a connector (1-2), and the drug delivery head (2) is installed on the needle tube (1) through the connector (1-2). The drug delivery rod (4) extends into the drug delivery head (2) through the connector (1-2).

10. A rectal medication applicator according to claim 1, characterized in that, The delivery head (2) is provided with a receiving cavity (2-1) for containing liquid drugs, and a conical opening (2-2) for fixing solid drugs is provided at the end of the receiving cavity (2-1).

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