Dosing device for cervical photodynamic therapy

Abstract

The utility model discloses a photodynamic therapy dosing device for cervix uteri, and relates to the field of medical equipment, the dosing device comprises a supporting rod, a dosing section arranged at the top of the supporting rod, and an expansion section arranged below the dosing section, the dosing section comprises two parts, one part is a dosing head used for stretching into the cervix uteri, and the other part is an expansion head used for stretching into the cervix uteri. The other part is a medicine support used for applying medicine to the cervix uteri outside the cervix uteri; the expansion and contraction section is of a structure capable of expanding and contracting and is used for expanding to support the vagina and prevent the medication part from slipping off after the medication part is sent to a designated position and contracting after medication is finished, and the dosing device is convenient to take out. According to the utility model, the medicine is prevented from being polluted, the use difficulty of medical personnel is reduced, the discomfort of a patient is relieved, and the risk that foreign matters are left in the body of the patient when being taken out is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical equipment, specifically, the utility model relates to a kind of for cervical photodynamic therapy dosing device. BACKGROUND

[0002] Photodynamic therapy is a non-invasive and promising treatment method, which uses a specific photosensitizer to apply to the lesion site, absorbs for 3-6 hours, and then uses specific wavelength light for local irradiation to induce target cell apoptosis. Compared with traditional treatment methods, photodynamic therapy has the characteristics of non-invasiveness, high selectivity and low recurrence rate, and is widely used in clinical applications. However, before irradiation, the drug needs to be fully absorbed by the human body, and the drug needs to be applied with the help of cotton, and the tampon needs to be prevented from falling off, so as to ensure the effectiveness of photodynamic therapy.

[0003] The cervix is part of the uterus and is connected to the vagina. Because it is located in the deep part of the vagina, especially the cervical canal, it is impossible to accurately deliver the drug to the cervical canal by applying the drug, so when using the drug in the hospital, medical staff often need to open the speculum to apply the drug to the cervix, use sterile cotton to dip the drug, and place it in the cervical canal. A thin layer of sterile cotton with drug is applied to the outside of the cervical orifice, and after the drug is applied, it needs to be kept for a certain period of time to allow the drug to be fully absorbed. During this period, in order to prevent the drug from flowing out, a condom is often used to cover the tampon and inserted into the vagina to block the cervical orifice. This method has several defects, one is that medical staff need to process sterile cotton into the required shape, which may cause contamination of the drug; two is that medical staff need to rely on experience to judge when placing sterile cotton into the cervical canal, and those with insufficient experience are prone to insert too much or too little, which cannot fully utilize the drug; three is that after the drug is applied, the patient has a heavy foreign body sensation in the body, which makes it difficult to move, and the sterile cotton is prone to fall off; four is that since the sterile cotton is separated into the affected area, it needs to be removed again with a speculum to open the vagina and remove the cervical canal drug cotton, which is not very friendly to the patient's experience, and there is a risk of breaking the sterile cotton when removing it from the cervical canal, leaving some cotton in the cervical canal. Although the probability is very small. UTILITY MODEL CONTENTS

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a cervical photodynamic therapy dosing device.

[0005] The cervical photodynamic therapy dosing device according to the utility model comprises a support rod, a drug application section and a stretchable section,

[0006] The drug application section is arranged at the top of the support rod and comprises a drug application head and a soft drug holder below the drug application head, which is used to carry the drug.

[0007] The expansion and contraction section is arranged below the medicine application section and is a structure capable of expansion and contraction.

[0008] Preferably, the medicine application head is a capsule structure.

[0009] Further preferably, the medicine application head is a sealed capsule made of sterile cotton or composed of a microporous membrane or a semi-permeable membrane.

[0010] Preferably, the side of the medicine holder facing the medicine application head is concave.

[0011] Further preferably, the medicine holder is movably sleeved on the support rod.

[0012] Preferably, the expansion and contraction section is a capsule with a hollow cavity sleeved on the support rod, the bottom of the capsule is provided with a pipeline communicating with the hollow cavity, and an opening and closing structure is arranged on the pipeline for conducting or closing the pipeline.

[0013] Further preferably, the hollow cavity is filled with gas.

[0014] Further preferably, the opening and closing structure is a plug.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The cervical photodynamic therapy drug applicator provided by the utility model can accurately deliver drugs to the drug application site, facilitates the operation of medical staff, greatly reduces the operation time of medical staff in the vagina of a patient, and reduces the discomfort of the patient.

[0017] The cervical photodynamic therapy drug applicator provided by the utility model fills air in the capsule, so that the patient does not have a heavy foreign body sensation and can freely move during the waiting time after drug application.

[0018] The cervical photodynamic therapy drug applicator provided by the utility model does not require medical staff to directly contact the drug during drug application, thereby preventing the drug from being contaminated.

[0019] The cervical photodynamic therapy drug applicator provided by the utility model can be integrally taken out after deflation without the need to again open the speculum, thereby eliminating the risk of foreign matter being left behind. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 Fig. 4 is a perspective view of the capsule contraction and medicine holder opening of the cervical photodynamic therapy drug applicator;

[0021] Fig. 2 Fig. 5 is a perspective view of the capsule contraction and medicine holder contraction of the cervical photodynamic therapy drug applicator.

[0022] Fig. 3 This is a three-dimensional schematic diagram of the capsule expanding and the drug holder opening in a device used for cervical photodynamic therapy.

[0023] In the diagram: 1. Support rod; 2. Dosing section; 21. Dosing head; 22. Dosing support; 3. Expansion / contraction section; 31. Bag body; 32. Pipeline; 33. Plug. Detailed Implementation

[0024] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0025] like Figs. 1-3 As shown, a drug delivery device for cervical photodynamic therapy includes a support rod 1, a drug delivery section 2 located at the top of the support rod 1, and an expansion / contraction section 3 located below the drug delivery section 2.

[0026] The medication section 2 includes two parts: a medication head 21 for inserting into the cervix and a medication holder 22 for applying medication to the cervical opening from the outside of the cervix.

[0027] Section 3 is a structure that can expand and contract. It expands to support the vagina after the medication is inserted into the designated position to prevent the medication from slipping off, and contracts after the medication is administered to facilitate the removal of the medication applicator.

[0028] Furthermore, the support rod 1 has a smooth head, which is wrapped with a sac-shaped medication head 21.

[0029] Specifically, the application head 21 can be sterile cotton, and the prepared medication is applied to the sterile cotton during use.

[0030] Specifically, the medication head 21 can also be a closed capsule made of a microporous membrane or a semipermeable membrane, filled with therapeutic drugs.

[0031] Furthermore, the medication holder 22 is made of a soft material (such as silicone), and preferably has a concave shape on the side facing the medication head 21 to hold the medication. In use, first pinch the medication holder 22 with your hand or tweezers to shrink it, making it easier to insert into the medication application position. Once the medication head is inserted, release your hand or tweezers; the medication holder 22 will open and return to its original shape. Place it on the cervix for external medication application.

[0032] Furthermore, the medication holder 22 is movably mounted on the support rod 1. When the medication is used, the medication holder 22 opens and returns to its original shape, and then is pushed to make it fit more tightly against the cervix.

[0033] Furthermore, the expansion and contraction section 3 includes a hollow bladder 31 sleeved outside the support rod 1. The bottom of the bladder 31 is connected to a pipe 32 for fluid (such as gas or liquid) to flow into / out of the bladder 31 through the pipe 32, so that the bladder 31 expands / contracts.

[0034] Specifically, the end of the tube 32 is provided with a plug 33. When the fluid enters the inside of the sac 31 and expands to a suitable volume, the tube 32 is sealed by the plug 33 so that the sac 31 remains expanded. This serves two purposes: first, it supports the sac inside the vagina and does not affect the patient's simple activities (such as turning over); second, the top of the sac 31 expands into an arc-shaped protrusion that can rest against the bottom surface of the medicated support 22.

[0035] More specifically, the fluid is preferably gas, which is lighter and more convenient, so that patients can walk for short periods of time during the application of the medication. For example, the end interface of the tubing 32 is designed to match the nipple end of the syringe. During use, air can be drawn into the syringe, the nipple is connected to the port of the tubing 32, and air is injected into the capsule 31 to make it expand.

[0036] It is worth noting that in actual use, the plug 33 can be replaced with any device that can seal the pipe 32, such as a latex pipe clamp or rubber band.

[0037] When using it, first, the delivery device is in the position of Fig. 1 As shown, the prepared medication is applied to the dispensing head 21 and the medication holder 22, and then the oval forceps are used to clamp the medication holder 22, so that the dispensing device is positioned as shown. Fig. 2 In the indicated state, the speculum is placed inside the vagina, and the medication applicator 21 is inserted into the cervical canal. The medication support 22 is released, allowing it to completely cover the cervical surface. The plug 33 is opened, and fluid (preferably gas) is injected into the capsule 31 through the tube until the patient feels a sense of support. Injection is then stopped. Irradiation is performed 3-6 hours after the medication application. First, the plug 33 is opened, and the capsule 31 is contracted. The medical staff holds the bottom of the support rod 1 and pulls the medication applicator outward. Because the medication support 22 is made of soft material, it can deform freely as it passes through the vagina, requiring no additional movements to the patient's body, thus providing a patient-friendly experience. Furthermore, since the medication applicator is a single unit, it detaches completely from the patient's body without any foreign objects being left behind. Even if something is left behind, it can be detected and removed promptly.

[0038] It should be noted that, due to the different sizes of the cervical surface of different age groups, the length and thickness of the cervical canal are different, so in actual implementation, the medicine head and the medicine support 22 provided by the medicine applicator can be designed as products of multiple size specifications to adapt to the needs of different human bodies; meet the depth of the medicine site in the cervical canal and other problems, therefore, the distance between the medicine head and the medicine support 22 of the medicine applicator can also be designed in multiple size specifications. The specific specifications can be set according to the experience and needs of medical personnel.

[0039] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined without conflict.

Claims

1. A drug delivery device for cervical photodynamic therapy, characterized in that, The drug delivery device includes a support rod (1), a drug delivery section (2), and an expansion and contraction section (3). The drug delivery section (2) is located at the top of the support rod (1) and includes a drug delivery head (21) and a soft drug holder (22) located below the drug delivery head (21) for carrying the drug. The expansion and contraction section (3) is located below the drug delivery section (2) and is a structure that can expand and contract.

2. The cervical photodynamic therapy drug delivery device according to claim 1, characterized in that, The medication head (21) has a sac-like structure.

3. A cervical photodynamic therapy drug delivery device according to claim 2, characterized in that, The medication head (21) is made of sterile cotton or is a closed capsule made of microporous membrane or semipermeable membrane.

4. A cervical photodynamic therapy drug delivery device according to claim 1, characterized in that, The side of the medicine holder (22) facing the medicine dispensing head (21) is concave.

5. A cervical photodynamic therapy drug delivery device according to claim 4, characterized in that, The medicine holder (22) is movably fitted onto the support rod (1).

6. A cervical photodynamic therapy drug delivery device according to claim 1, characterized in that, The expansion and contraction section (3) is a bladder (31) with a hollow cavity that is sleeved outside the support rod (1). The bottom of the bladder (31) is provided with a pipe (32) that connects to the hollow cavity. The pipe (32) is provided with an opening and closing structure for opening or closing the pipe (32).

7. A cervical photodynamic therapy drug delivery device according to claim 6, characterized in that, The hollow cavity is used to fill gas.

8. A cervical photodynamic therapy drug delivery device according to claim 6, characterized in that, The opening and closing structure is a plug (33).

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