An rectal medication delivery device with internal sealing of the dispensing port

Abstract

An anorectal drug delivery device with internal sealing of the drug outlet includes a hollow rod-shaped component and an auxiliary component. The rod-shaped component is divided into a tail section, a middle section, and a head section. The internal space of the rod-shaped component forms a drug channel for delivering drugs. The drug channel has at least one inlet located at the bottom of the tail section and at least one first outlet located at the head section. The auxiliary component is hollow and cap-shaped, divided into a tail section, a middle section, and a head section. The auxiliary component is at least fitted onto the head section of the rod-shaped component, i.e., the head section is covered within the internal space of the auxiliary component. The auxiliary component is made of a material with a lower hardness than the rod-shaped component. A sealing body is provided at the head section of the auxiliary component, and at least one second outlet is provided on the auxiliary component. In use, pulling the head section of the auxiliary component from the outside or increasing the internal pressure of the drug channel drives the sealing body to deform and displace, causing the sealing body to detach from the head section of the rod-shaped component, opening the first outlet. Fluid entering the drug channel flows out through the first outlet and then through the second outlet on the auxiliary component.

Description

Technical Field

[0001] This invention relates to a rectal medication delivery device with an internal sealing of the dispensing port, belonging to the field of medical device technology. Background Technology

[0002] The anal crypts, also known as anal crypts, are located at the dentate line at the end of the human rectum. They are funnel-shaped and open upwards, and there are usually 6 to 8 of them. Inside the anal crypts are anal glands, whose secretions lubricate the passage of stool. During defecation, the anal crypts become shallower and the inner walls of the anal crypts come into contact with the stool. When the openings of the anal glands are blocked by stool, the lubricating fluid secreted by the anal glands cannot enter the anal crypts. The anal crypts become dry, and the shallower, unlubricated inner walls of the anal crypts come into contact with the stool, increasing the friction between the stool and the anal canal wall and affecting the smooth passage of stool. Moreover, the anatomical features of the anal crypts make it easy for stool and foreign objects to accumulate within them. Once bacteria become infected, the inflammatory substances are difficult to drain. Inflammation of the anal crypts often irritates the anal sphincter, causing spasms that can induce constipation and may also lead to other anorectal diseases such as perianal abscesses.

[0003] Constipation is a common clinical symptom, with a prevalence rate as high as 27% in the population. Currently, rectal administration is the most widely used treatment for constipation in clinical practice. One of the principles of rectal administration for treating constipation is to inject medication into the rectum, lubricating and softening the anal and rectal walls and expelling feces, thereby relieving constipation symptoms. The most typical rectal administration device is an enema. Currently, before using an enema, the outlet is usually blocked with a stopper or cap to prevent leakage. When using it, the stopper or cap is removed, and the rigid injection tube is pushed into the anus. The anal and rectal mucosa is easily damaged by mechanical force, and the operation is relatively cumbersome.

[0004] This invention provides an anorectal drug delivery device with an internally sealed drug outlet. A flexible auxiliary component contacts the anorectal mucosa. During use, the head of the auxiliary component is pulled from the outside or the internal pressure of the drug channel is increased to drive the deformation and displacement of the sealing body, so that the sealing body can be detached from the head of the rod-shaped component. The operation is simple. Moreover, the liquid outlet is located on the side, so the drug can more easily contact the anorectal wall to achieve the effects of lubricating defecation and full and accurate drug delivery. Summary of the Invention

[0005] The objective of this invention is achieved as follows:

[0006] An anorectal drug delivery device with internal sealing of the dispensing port includes a hollow rod-shaped component and an auxiliary component. The main body of the rod-shaped component is divided into a tail section, a middle section, and a head section. The internal space of the main body forms a drug delivery channel, which has at least one inlet located at the bottom of the tail section and at least one first dispensing port located at the head section. The auxiliary component is a hollow cap-shaped component, divided into a tail section, a middle section, and a head section. The auxiliary component is at least fitted onto the head section of the rod-shaped component, meaning the head section is enclosed within the internal space of the auxiliary component. The auxiliary component is made of a material with low hardness. The rod-shaped component also includes a plugging body disposed at the head of the auxiliary component and at least one second drug outlet on the auxiliary component; the plugging body is the part of the top of the auxiliary component head extending into the internal space of the auxiliary component; the plugging body closes the first drug outlet located at the head of the rod-shaped component. In use, the head of the auxiliary component is pulled from the outside or the internal pressure of the drug channel is increased, driving the plugging body to deform and displace, so that the plugging body detaches from the head of the rod-shaped component, the first drug outlet opens, and the fluid entering the drug channel flows out through the first drug outlet and then through the second drug outlet on the auxiliary component; the first drug outlet and the second drug outlet are preferably designed to be adjacent but partially misaligned to avoid drug backflow.

[0007] The head of the rod-shaped component is enclosed within the internal space of the auxiliary component. This enclosed ...

[0008] The first drug outlet is sealed at the head of the rod-shaped component. This means that a sealing body protruding from the inner surface of the auxiliary component head, which is integrated with the auxiliary component head, seals the first drug outlet by embedding or wrapping it. The fluid will not flow out of the first drug outlet due to gravity when the rod-shaped component is inverted. There can be one or more first drug outlets. The first drug outlet can be axially opened at the top of the rod-shaped component head or radially opened on the side of the rod-shaped component. The first drug outlet and the second drug outlet are usually located close to each other. The second drug outlet can be opened radially or axially.

[0009] The auxiliary component can be used to cover the head of the rod-shaped component, or it can also cover the middle part of the rod-shaped component or even part of the tail of the rod-shaped component. The length of the head of the rod-shaped component can also be set to account for more than 50% of the total length of the rod-shaped component, for example, to meet the requirement that the first drug outlet is positioned closer to the drug inlet at the bottom of the tail of the rod-shaped component.

[0010] Furthermore, to enhance the stimulation of the anorectal mucosa and to dilate the anal canal, the outer surface of the rod-shaped component and / or the outer surface of the auxiliary component may protrude radially outward to form at least one enlarged portion, especially at the position of their respective heads.

[0011] In order to allow the rod-shaped component to pass smoothly through the right angle of the human anus during insertion and to contact a larger area of ​​anorectal mucosa tissue during rotation after insertion, at least a portion of the head of the rod-shaped component and at least a portion of the head of the auxiliary component are bent to one side, or if both are bent, they are bent to the same side.

[0012] Furthermore, the outer surface of the rod-shaped component is provided with annular ribs to prevent the auxiliary component sleeved on it from detaching under external force, specifically to prevent the auxiliary component from detaching radially from the head of the rod-shaped component.

[0013] The auxiliary component is designed to thoroughly wipe the anal sinuses and clean the anal canal. It is equipped with protrusions, including those in the form of cords, nails, bosses, hooks, teardrops, horizontal stripes, scattered dots, serrations, beads, wrinkles, terraces, burrs, and continuous spirals, as well as pits that can accommodate drugs and feces.

[0014] Furthermore, at least a portion of the auxiliary component is free to become a foldable part, including a skirt-shaped, umbrella-shaped, leaf-shaped, or bud-shaped part; the free nature of the auxiliary component means that this part is not integrated with the auxiliary component but can deform and move within a certain range, including tensile deformation, bending deformation, and folding deformation.

[0015] In order to more tightly seal the first drug outlet, the first drug outlet is axially opened at the top of the rod-shaped component, and the drug channel adjacent to the first drug outlet is partially provided with an enlarged cavity. The sealing body is embedded in the enlarged cavity to seal the first drug outlet.

[0016] To facilitate sealing the first drug outlet, the top of the auxiliary component is recessed downwards to form a sunken slit that stops at or is embedded in the sealing body. External tools can press the sealing body into the drug channel through this sunken slit to seal the first drug outlet. The embedded part of the sunken slit can assist the action of internal and external forces. The hollow sealing body is easy to deform centripetally to reduce the friction between it and the inner surface of the drug channel, thus making it easier for the sealing body to detach from the first drug outlet.

[0017] The anal canal is the end of the digestive tract, extending from the dentate line at the top to the anal verge at the bottom. Its length is closely related to defecation function. To measure the length of the anal canal, the outer surface of the rod-shaped component is provided with graduations that increase sequentially from the head of the rod-shaped component to the tail of the auxiliary component.

[0018] Furthermore, the head of the rod-shaped component and / or the head of the auxiliary component protrude outward to form an enlarged portion, and the outer surface of the rod-shaped component is provided with scale lines whose values ​​increase sequentially from the head of the rod-shaped component to the tail of the rod-shaped component, for measuring the length of the anal canal.

[0019] An optimized solution is provided where a deformable portion is provided between the head of the auxiliary component and the middle part of the auxiliary component, so that the head of the auxiliary component can be easily moved by external force, thereby causing the sealing body to detach from the head of the rod-shaped component; the deformable portion can be a relatively thin wall of a local section of the circumference or a local circumferential corrugated tube structure.

[0020] To ensure that the auxiliary component is securely fixed to the rod-shaped component, a constraint component is also included, which is sleeved on the outer surface of the tail of the auxiliary component so that it is in close contact with the corresponding area of ​​the rod-shaped component; preferably, the constraint component is sleeved between two annular ribs on the outer surface of the opposing rod-shaped component.

[0021] For delivering fluid substances that can be used for lubrication, cleaning, and treatment, the device also includes a container that can be sealed to or integrally formed with the tail of the rod-shaped component, the inner cavity of which contains a liquid or paste-like agent; the agent may refer to drug solutions, emulsions, ointments, and gels, etc., which play a role in lubrication, antibacterial, cleaning, and promoting wound healing, and may also be used for the injection of probiotics.

[0022] The beneficial effects of this invention are:

[0023] 1. Opening the drug outlet only requires pulling the head of the auxiliary component from the outside or increasing the internal pressure of the drug channel, making the operation simple.

[0024] 2. The first and second drug outlets are located on different components and can be designed to be partially staggered. Liquid or ointment-like drugs flow out of the second drug outlet at a low flow rate, which can fully lubricate the anorectal mucosa. Furthermore, the drug outlet is located on the side, which can further lubricate the anorectal mucosa and promote defecation. It can also fully coat the mucosa with astringent, hemostatic, anti-inflammatory, tissue-regenerating, antibacterial and other Chinese and Western medicines.

[0025] 3. The functional structure on the flexible auxiliary component can fully wipe the anal canal mucosa and act on the defecation receptors, which helps with defecation induction, anal canal maintenance, and prevention and treatment of anal canal diseases such as anal sinusitis. Attached Figure Description

[0026] The following figures are not limited to the present invention:

[0027] Figure 1A Anatomical diagram of the anal canal and anal sinuses;

[0028] Figure 1B Schematic diagram of a cross-section of the anal sinus;

[0029] Figure 1CSchematic diagram of Embodiment 1 of the present invention

[0030] Figure 1D Cross-sectional view of Embodiment 1 of the present invention

[0031] Figure 1E Cross-sectional view of the occlusion state in Example 1

[0032] Figure 1F Cross-sectional view of Example 1 in its unsealed state.

[0033] Figure 1G Example 1: Schematic diagram of the anal canal not being entered.

[0034] Figure 1H Example 1: Schematic diagram of entry into the anal canal

[0035] Figure 2A Cross-sectional view of the occlusion state in Example 2

[0036] Figure 2B Cross-sectional view of Example 2 in its unsealed state.

[0037] Figure 3A Schematic diagram of Example 3

[0038] Figure 3B Cross-sectional view of Example 3

[0039] Figure 3C Cross-sectional view of the occlusion state in Example 3

[0040] Figure 3D Cross-sectional view of Example 3 in its unsealed state.

[0041] Figure 4A Cross-sectional view of the blocked state in Example 4

[0042] Figure 4B Cross-sectional view of Example 4 in its unsealed state.

[0043] Figure 5A Example 5: Schematic diagram of the unfolded state

[0044] Figure 5B Example 5: Schematic diagram of the folded state

[0045] Figure 6A Schematic diagram of Example 6

[0046] Figure 6B Cross-sectional view of Example 6

[0047] Figure 6C Example 6: Schematic diagram of entry into the anal canal

[0048] Figure 7 Schematic diagram of Example 7 Detailed Implementation

[0049] Example 1:

[0050] like Figure 1A , 1B As shown, the location and brief structure of the human anal sinus are first explained: the anal canal A1, the dentate line A2, the anal sinus A3, and the opening A5 of the anal gland A4 is blocked by feces or foreign objects B.

[0051] like Figure 1C-1H As shown in the accompanying drawings, a rectal medication applicator with an internally sealed dispensing port includes a hollow rod-shaped component 1 and an auxiliary component 2. The main body of the rod-shaped component 1 is divided into a tail portion 11, a middle portion 12, and a head portion 13. The internal space of the main body of the rod-shaped component 1 forms a medication channel 10 for delivering medication. The medication channel 10 has at least one inlet 101 located at the bottom end of the tail portion 11 and at least one first dispensing port 102 located at the head portion 13. Figure 1D , 1E The first drug outlet 102 is shown to be in a closed state. The auxiliary component 2 is a hollow cap-shaped body, which can be molded from medical-grade thermoplastic elastomer (TPE) or silicone rubber, etc. It not only has good biocompatibility, but also has a soft texture and is more comfortable to contact with the human body. The auxiliary component 2 is divided into an auxiliary component tail 21, an auxiliary component middle part 22, and an auxiliary component head 23. The auxiliary component 2 is at least fitted onto the head 13 of the rod-shaped component, that is, the head 13 of the rod-shaped component is covered in the internal space 20 of the auxiliary component. The hardness of the material of the auxiliary component 2 is lower than that of the rod-shaped component 1. It also includes a sealing body 231 protruding from the inner surface of the head 23 of the auxiliary component and an opening on the auxiliary component 2. At least one second drug outlet 202 is provided; the sealing body 231 is the part of the auxiliary component head 23 extending into the internal space 20 of the auxiliary component. The sealing body 231 closes the first drug outlet 102 located at the rod-shaped component head 13. In this embodiment, the sealing body 231 closes the first drug outlet by embedding. In use, the auxiliary component head 23 is pulled from the outside or the internal pressure of the drug channel 10 is increased to drive the sealing body 231 to deform and displace, so that the sealing body 231 is detached from the rod-shaped component head 13, the first drug outlet 102 is opened, and the fluid entering the drug channel 10 flows out through the first drug outlet 102 and then through the second drug outlet 202 opened on the auxiliary component 2; such as Figure 1F As shown, the liquid or paste-like drug F entering the drug channel 10 first flows out through the first drug outlet 102 and then through the second drug outlet 202 opened on the auxiliary component 2; Figure 1D , Figure 1E It is in a blocked state. Figure 1F It is in an unblocked state.

[0052] like Figure 1CAs shown, the outer surface 14 of the rod-shaped component has scale lines S with values ​​increasing sequentially from the head 13 to the tail 11 of the rod-shaped component, used to measure the length of the anal canal; as Figure 1C-1F As shown, the auxiliary component 2 is provided with a hook-shaped protrusion 242 and a recess 243 for containing medicine and feces. The outer surface 14 of the rod-shaped component is provided with an annular rib 141 to prevent the auxiliary component 2 fitted on it from falling off under external force. The head 13 of the rod-shaped component is covered in the internal space 20 of the auxiliary component. It can be a tight and seamless cover, or a cover with a gap 201 that communicates with the second medicine outlet 202 (not shown in the figure), or a partially hollowed-out cover. However, during use, the soft auxiliary component 2 is still the main contact with the anorectal mucosa. To increase the stimulation of the anorectal mucosa and to dilate the anal canal, the outer surface 24 of the auxiliary component protrudes outward to form at least one enlarged part 241. It also includes a container V that can be sealed to the tail 11 of the rod-shaped component. The inner cavity V0 of the container contains liquid or paste-like medicine F. Figure 1E (As shown).

[0053] like Figure 1D-1F As shown, the top of the auxiliary component head 23 is recessed downward to form a sunken slit 230 that stops at or is embedded in the sealing body 231. An external tool can press the sealing body 231 into the drug channel 10 through the first drug outlet 102 through this sunken slit 230 to seal the first drug outlet 102. The embedded part 2300 of the sunken slit 230 embedded in the sealing body 231 can assist the action of internal and external forces. The hollow sealing body 231 is easy to deform centripetally to reduce the friction between it and the inner surface of the drug channel 10, so that the sealing body 231 can be more easily detached from the first drug outlet 102. A deformable part 221 is provided between the auxiliary component head 23 and the auxiliary component middle part 22, which makes it easy to pull the auxiliary component head 23 from the outside to easily move it and thus drive the sealing body 231 to detach from the rod-shaped component head 13. In this embodiment, the deformable part 221 is a relatively thin wall of a local section of the circumference.

[0054] like Figure 1G The diagram shown is a schematic of the insertion into the anal canal A1 in Embodiment 1. The protrusion 242 on the auxiliary component 2 scrapes away fecal matter B or inflammatory secretions accumulated in the anal sinus A3; as shown Figure 1H As shown in Example 1, the anal canal A1 is removed, and the liquid or paste-like medicine in the inner cavity V0 of the container enters the rectum. At this time, the protrusion 242 on the auxiliary component 2 cleans the anal sinus A3 again, and the pit on the auxiliary component 2 carries the contained feces or inflammatory secretions out of the body (not shown in the figure).

[0055] Example 2:

[0056] like Figure 2A-2BAs shown, unlike the above embodiment, the first drug outlet 102 is axially opened at the top of the rod-shaped component head 13. The drug channel 10 adjacent to the first drug outlet 102 is partially provided with an enlarged cavity 130. The sealing body 231 is embedded in the enlarged cavity 130 to seal the first drug outlet 102. This further helps the sealing body 231 to seal the first drug outlet by embedding, preventing deformation and displacement of the sealing body 231 when the internal pressure of the drug channel 10 slightly increases due to operational errors. Figure 2A In a blocked state, such as Figure 2B The unsealed state is when the sealing body 231 is detached from the head 13 of the rod-shaped component.

[0057] Example 3:

[0058] like Figures 3A-3D As shown, unlike Embodiment 1, the sealing body 231, which is integrated with the auxiliary component head 23 and protrudes from the inner surface of the auxiliary component head, seals the first drug outlet 102 by wrapping it. Furthermore, the liquid or paste-like drug F contained in the container cavity V0 will not flow out of the first drug outlet 102 due to gravity when the rod-shaped component 1 is inverted. The first drug outlet 102 is axially located at the top of the rod-shaped component head 13. During use, increasing the internal pressure of the drug channel 10 drives the sealing body 231 to detach from the rod-shaped component head 13, opening the first drug outlet 102. The fluid entering the drug channel 10 first flows through the first drug outlet 102 and then out through the second drug outlet 202 on the auxiliary component 2. Figure 3A This is a three-dimensional schematic diagram of this embodiment. Figure 3B , Figure 3C This is a diagram showing the state of the sealing body 231 surrounding the first drug outlet 102. Figure 3D This is a diagram showing the state of the sealing body 231 without enclosing the first drug outlet 102.

[0059] Example 4:

[0060] like Figure 4A , Figure 4B As shown, unlike the above embodiment, the first drug outlet 102 is axially opened at the top of the rod-shaped component head 13. A groove structure 131 is provided on the outer surface of the rod-shaped component head 13 adjacent to the first drug outlet 102. The corresponding protruding part 2311 of the sealing body 231 is embedded inside the groove structure 131, more securely sealing the first drug outlet 102. This prevents deformation and displacement of the sealing body 231 when the internal pressure of the drug channel 10 slightly increases due to operational errors, which could cause the first drug outlet 102 to open and the liquid or paste-like drug F contained in the container cavity V0 to flow out. Figure 4A In a blocked state, such as Figure 4B The unsealed state is when the sealing body 231 is detached from the head 13 of the rod-shaped component.

[0061] Example 5:

[0062] like Figure 5A , Figure 5B As shown, unlike Embodiment 1, at least a portion of the auxiliary component 2 is freed to become a foldable portion 25, including a skirt-like, umbrella-like, leaf-like, or bud-like shape. The connection between the foldable portion 25 and the auxiliary component 2 can be designed to be difficult to separate. Specifically, the friction generated when entering and exiting the anal canal makes it difficult to separate. The foldable portion 25 can be provided with secondary protrusions 251 and secondary depressions 252, which can thoroughly wipe away and remove feces, inflammatory secretions, etc. from the anal sinuses and contain them in the depressions for removal from the body. This helps to eliminate constipation caused by anal sinus inflammation and helps to prevent and treat anal sinusitis after diarrhea. The secondary depressions can also contain a certain amount of drugs with lubricating, cleaning, and antibacterial effects. Figure 5A As shown, this is the state of the foldable part before it is folded; as Figure 5B The image shows the foldable portion after it has been folded.

[0063] Example 6:

[0064] The anal right angle is the angle formed by the lower rectum and the axis of the anal canal, and it is an important structure for preventing defecation.

[0065] like Figures 6A-6C As shown, unlike Embodiment 1, at least a portion of the head 13 of the rod-shaped component is bent to one side to conform to the right angle of the anus, stimulating the rectal sensory nerves, causing a feeling of rectal distension, effectively stimulating the rectal distension sensation and inducing the distension reflex, producing the urge to defecate; and when the bent head rotates, it can further stimulate the nerve endings in the anal cushion area, such as the tension receptor Pacinian corpuscle, the friction receptor Genital corpuscle, and the pressure receptor Golgi-Mazzoni body, inducing the defecation reflex; Figure 6C This diagram shows the passage through the anal right angle into the rectum.

[0066] Example 7:

[0067] like Figure 7 As shown, unlike Embodiment 1, it also includes a restraining component C, which is annularly and interference-fitted onto the outer surface of the tail 21 of the auxiliary component. This ensures that the area corresponding to the head 13 of the rod-shaped component is in close contact with the auxiliary component 2, preventing the auxiliary component 2 from detaching from the rod-shaped component 1 due to friction or other reasons during insertion and removal of the anal tube. Alternatively, it may prevent the liquid or paste-like drug F in the container cavity V0 from flowing out through any gap that may appear between the auxiliary component 2 and the rod-shaped component 1 after the first drug outlet 102 is opened due to insufficient sealing between the auxiliary component 2 and the rod-shaped component 1. The restraining component C can further prevent the risk of the drug flowing out through such a gap.

Claims

1. A rectal medication applicator with an internally sealed dispensing port, comprising a hollow rod-shaped component (1) and an auxiliary component (2), wherein the rod-shaped component (1) is divided into a rod-shaped component tail (11), a rod-shaped component middle part (12), and a rod-shaped component head (13), and the internal space of the rod-shaped component (1) forms a drug channel (10) for delivering drugs, the drug channel (10) having at least one drug inlet (101) at the bottom end of the rod-shaped component tail (11) and at least one first drug outlet (102) at the rod-shaped component head (13); the auxiliary component (2) is hollow and cap-shaped, divided into an auxiliary component tail (21), an auxiliary component middle part (22), and an auxiliary component head (23), the auxiliary component (2) being at least fitted onto the rod-shaped component head (13), i.e., the rod-shaped component head (13) being covered within the auxiliary component's internal space (20), and the auxiliary component (2) having a lower material hardness than the rod-shaped component (1), characterized in that: It also includes a plug (231) disposed on the head (23) of the auxiliary component and at least one second drug outlet (202) opened on the auxiliary component (2); the plug (231) is the part of the top of the head (23) of the auxiliary component extending into the internal space (20) of the auxiliary component. The plug (231) closes the first drug outlet (102) located on the head (13) of the rod-shaped component. When in use, the head (23) of the auxiliary component is pulled from the outside or the internal pressure of the drug channel (10) is increased to drive the plug (231) to deform and displace, so that the plug (231) is detached from the head (13) of the rod-shaped component, the first drug outlet (102) is opened, and the fluid entering the drug channel (10) flows out through the first drug outlet (102) and then through the second drug outlet (202) opened on the auxiliary component (2).

2. The rectal medication applicator with internal sealing of the dispensing port according to claim 1, characterized in that: The outer surface (14) of the rod-shaped component is provided with annular ribs (141) to prevent the auxiliary component (2) sleeved on it from detaching under external force.

3. The rectal medication applicator with internal sealing of the dispensing port according to claim 1, characterized in that: The auxiliary component (2) is provided with protrusions (242) including those in the form of strips, nails, bosses, hooks, teardrops, horizontal stripes, scattered dots, serrations, beads, wrinkles, terraces, burrs, and continuous spirals, and or with depressions (243) that can accommodate drugs and feces.

4. The rectal medication applicator with internal sealing of the dispensing port according to claim 1, characterized in that: At least a portion of the auxiliary component (2) is freed to become a foldable part (25) including a skirt-shaped, umbrella-shaped, leaf-shaped, or bud-shaped part.

5. The rectal medication applicator with internal sealing of the dispensing port according to claim 1, characterized in that: The first drug outlet (102) is axially opened at the top of the head (13) of the rod-shaped component. The drug channel (10) adjacent to the first drug outlet (102) is partially provided with an enlarged cavity (130). The sealing body (231) is embedded in the enlarged cavity (130) to seal the first drug outlet (102).

6. The rectal medication applicator with internal sealing of the dispensing port according to claim 1, characterized in that: The top of the auxiliary component head (23) is recessed downward to form a sunken slit (230) that stops at or is embedded in the sealing body (231). An external tool can press the sealing body (231) through the first drug outlet (102) into the drug channel (10) through this sunken slit (230) to block the first drug outlet (102).

7. The rectal medication applicator with internal sealing of the dispensing port according to claim 1, characterized in that: The outer surface (14) of the rod-shaped component is provided with scale lines (S) that increase sequentially from the head (13) to the tail (11) of the rod-shaped component, for measuring the length of the anal canal (A1).

8. The rectal medication applicator with internal sealing of the dispensing port according to claim 1, characterized in that: The auxiliary component head (23) and the auxiliary component middle part (22) are provided with a deformable part (221), which makes it easy to pull the auxiliary component head (23) from the outside to easily move it, thereby driving the sealing body (231) to detach from the rod-shaped component head (13).

9. A rectal medication applicator with an internally sealed dispensing port according to claim 1, characterized in that: It also includes a constraint component (C), which is fitted onto the outer surface of the tail (21) of the auxiliary component, so that it is in close contact with the area corresponding to the rod-shaped component (1).

10. A rectal medication applicator with an internally sealed dispensing port according to claim 1, characterized in that: It also includes a container (V) that can be sealed to or integrally formed with the tail of the rod-shaped component (11), the inner cavity (V0) of which contains liquid or paste-like agents.

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