Instrument for postoperative administration of anorectal diseases

Abstract

The invention provides an appliance for postoperative administration of anorectal diseases, and belongs to the field of medical instruments. The tool comprises a mandrel and a cotton fiber body wound outside the mandrel, wherein the cotton fiber body is bullet-shaped and has a waisted structure in the middle. During dressing change, required medicines (such as various pastes, powders or liquids) are uniformly smeared on the surface of the cotton fiber body or adsorbed on the cotton fiber body, the tail end of the core shaft is held by hand to slowly insert the cotton fiber body end into the anus, and the core shaft is pulled out when the waisted part of the cotton fiber body is in interference fit with the anatomical narrow part of the straight anus ring, so that the administration body can be automatically clamped and detained for a long time. The technical bottlenecks of difficulty in drug retention on the wound surface and secondary injury risk in the traditional method are solved, and the method has the advantages of low cost, easiness in operation and comfort, and is suitable for postoperative drug delivery of various anorectal diseases with surgical wound surfaces positioned near the anal canal and the tooth trace.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, specifically a postoperative drug delivery device for anorectal diseases that is adaptive to the anal anatomical structure. It achieves drug contact with the wound surface and achieves a sustained release effect through physical positioning. It is particularly suitable for drug delivery and sustained release treatment of postoperative wounds such as hemorrhoids, anal fissures, anal sinusitis, anal fistulas, perianal abscesses, and anal stenosis. Background Art

[0002] Anorectal diseases are common and frequently occurring. This is especially true for common perianal conditions such as hemorrhoids, anal fissures, anal sinusitis, anal fistulas, and perianal abscesses. After surgical treatment, the surgical wound often occurs near the anal canal and dentate line. The contraction of the rectal ring keeps this area closed, preventing sufficient and prolonged drug adhesion to the wound. This significantly impacts the effectiveness of daily dressing changes and prolongs wound healing. Currently, there are two main methods for topical drug administration: applying the drug to wounds outside the anus, and administering the drug as a suppository, which is inserted into the anus for primary absorption via the rectum. Neither of these methods directly delivers the drug to the entire wound surface. Alternatively, a device similar to an anoscope is used to place a drug-soaked gauze strip on wounds near the anal canal and dentate line. However, this method mechanically dilates the wound, causing pain to the patient and potentially damaging the wound, increasing the risk of bleeding. Summary of the Invention

[0003] The present invention provides a zero-mechanical-injury, self-adaptive-fixation, low-cost anorectal postoperative drug delivery device, which solves the technical bottlenecks of drug retention in wounds and the risk of secondary injury faced by anorectal postoperative drug delivery.

[0004] Technical points (attached Figure 1 ): The apparatus includes a mandrel (with Figure 1 1) and the cotton fiber body wrapped around it (attached Figure 1 2), the cotton fiber body is bullet-shaped and has a waist structure in the middle (attached Figure 1 3).

[0005] In the present invention, the core shaft (attached Figure 1 Medium 1): Diameter 2-5mm, length 15-30cm. Materials can be bamboo, wood, metal, plastic, paper, or other materials that meet medical material safety standards. The tip should be blunt (R angle ≥ 1mm) to prevent puncture of the wound and rectal mucosa. The surface should be smooth and thornless for easy extraction from the cotton fiber.

[0006] In the present invention, the cotton fiber body is in the shape of a bullet head (attached Figure 1Medium 2): 5-10cm long, 1.5-3.0cm in diameter, made of medical absorbent cotton fibers. The wrapping should not be too tight, ensuring the cotton fibers maintain a certain degree of elasticity and flexibility. This allows for slight deformation during insertion, ensuring a close fit with the wound surface, alleviating pain, and ensuring smooth removal of the mandrel.

[0007] In the present invention, the waist structure (attached Figure 1 Middle 3) is located in the middle 1 / 3 of the cotton fiber body, and the minimum waist diameter is 30%-50% of the maximum diameter at both ends of the cotton fiber body.

[0008] Preferably, the cotton fiber body can be pre-loaded with Western medicine drugs in the form of powders, liquids, gels, etc. that have the functions of stopping bleeding, relieving pain, relieving swelling and relieving pain, removing dead tissue and debridement, promoting blood circulation and removing blood stasis, promoting tissue regeneration and healing wounds, so as to facilitate direct clinical use.

[0009] Preferably, the surface of the cotton fiber body can be covered with a silk protein membrane (membrane thickness 50 μm, drug permeable pore diameter 0.1-0.5 μm).

[0010] Preferably, a developing line (barium wire weaving, X-ray development positioning) is added to the waist area.

[0011] Beneficial effects of the present invention: Based on the anatomical characteristics of the anal ring, the present invention proposes a bionic locking cotton twist structure, which solves many problems in dressing changes after anorectal surgery, especially the technical difficulties of drug retention in the wound and the risk of secondary injury. The details are as follows: 1. Anatomically adaptive positioning: The present invention uses a waist-constricted cotton fiber body to create an interference fit with the hourglass-shaped anatomical structure at the junction of the anus, and utilizes the contraction of the anal ring and the elasticity of the cotton fiber body to achieve self-locking, so that the cotton fiber body with attached drugs can remain on the wound surface for a long time, thus solving the problem of drug retention in the wound surface.

[0012] 2. Avoid secondary damage: The end of the core shaft of the present invention is passivated and wrapped with cotton fiber to prevent the core shaft from piercing the rectal mucosa; the cotton fiber is soft, elastic, and has a smooth surface. When inserted, it can be deformed appropriately according to the tension of the anal sphincter and the shape of the wound, and can pass smoothly with the help of the lubricating effect of the surface drug.

[0013] 3. Sustained release and enhanced efficacy: Cotton fibers can absorb drugs up to 3 times their own weight, and the cotton fiber network provides a channel for sustained drug release, which can maintain the effective drug concentration on the wound for more than 4 hours.

[0014] 4. Safe withdrawal: The anus-retaining part of the present invention is completely made of medical absorbent cotton fibers. After insertion, it can be discharged together with the feces, and can also be dragged out at any time through the part exposed outside the anus as needed.

[0015] 5. Stop bleeding from wounds: For minor bleeding from wounds, various hemostatic drugs can be attached to large cotton swabs and inserted into the anus. This not only allows sufficient hemostatic drugs to continuously act on the wound, but also has the effect of compressing and stopping bleeding.

[0016] 6. Wound Drainage: For wounds with profuse secretions, this invention also absorbs and drains secretions. A cotton swab without medication can be inserted directly into the anus to absorb secretions through the cotton fibers, and the device should be replaced regularly. Creams and powders such as decontaminating and wound-clearing agents can also be applied to enhance efficacy.

[0017] 7. Prevention of anal stenosis: In the late recovery period of anal surgery, especially when there are many wounds on the anal canal, the present invention can be placed on the anus for a long time to act as a mold, preventing the anal canal wound from adhering for a long time and thus forming stenosis.

[0018] 8. Effective pain relief: The retention part of the present invention is completely made of medical absorbent cotton fibers. The cotton body is soft, elastic, and has a smooth surface. When it is inserted into the anus, it deforms slightly and can fit tightly with the hourglass shape inside and outside the anus and the wound surface. It has little irritation to the wound surface, can reduce the pain of the patient when administering the drug, and there is no obvious foreign body sensation during the retention period.

[0019] 9. Easy to obtain: The present invention can be mass-produced by factory machines or made by medical staff at all levels of medical institutions. The only main materials required are medical absorbent cotton and a core shaft. It is simple to make and easy to use, making it highly valuable for promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] There is 1 attached figure (see the attached figure in the specification for details): Figure 1 : Schematic diagram of the overall structure of the present invention; marked in the figure: 1-axial core, 2-cotton fiber body, 3-waist structure. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with specific embodiments. The examples provided are only for illustrating the present invention and are not intended to limit the scope of the present invention. The examples provided below can serve as a guide for further improvements by those skilled in the art and do not constitute a limitation of the present invention in any way.

[0022] Example 1: Basic implementation Step 1: Prepare the Mandrel Materials: Moso bamboo was steamed to remove sugar (100℃×3h), dried (moisture content ≤8%), and polished (surface roughness Ra ≤6.3μm); Dimensions: length L=20cm, diameter Φ=3mm, head spherical surface R=1mm.

[0023] Step 2: Hand-rolling the cotton into shape Tear medical absorbent cotton into an equilateral triangle (5-10cm high, 1.0g / cm³ density). Increase the thickness of the cotton at the top corner and bottom edge, so that the ratio of the top 1 / 3: the middle 1 / 3: the bottom 1 / 3 is approximately 3:1:2. Place the blunted tip of the mandrel slightly below the top corner of the cotton piece, with the mandrel parallel to one side. Gently press the side cotton layer against the mandrel and rotate it, causing the cotton layer to wrap around the mandrel, ultimately forming a bullet-shaped cotton twist with a waisted structure in the middle.

[0024] Or step 2: machine roll cotton into shape Medical absorbent cotton fibers are wound mechanically in layers: Inner layer (contacting the core shaft): 3g long-staple cotton loose roll (density 0.6 g / cm³); middle layer (head / tail): 2g short-staple cotton loose roll (density 0.8 g / cm³); outer layer (all): 5g medium-staple cotton standard roll, with smooth transition between the three parts.

[0025] Step 3: Disinfection and sterilization: Suitable sterilization methods such as high-pressure steam, gamma rays, and ethylene oxide can be used.

[0026] Step 4: Drug loading: Liquids, powders, and pastes can all be attached or adsorbed.

[0027] Example 2: Optimization solution Bamboo sticks can be replaced with wooden sticks, metal sticks, plastic sticks, paper sticks, etc. that meet the safety standards of medical materials; The surface of cotton fiber is covered with silk protein film (film thickness 50μm, drug permeability pore diameter 0.1-0.550μm), or the cotton body is mixed with 5% chitosan short fibers to enhance adsorption; Add a developing line in the waist area (barium wire weaving, X-ray development positioning).

[0028] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. A cotton twist for administering medication after anorectal disease surgery, characterized in that: include: The slender core shaft has a front end dosing part and a rear end hand-held part; the cotton fiber body is wound and fixed on the outer periphery of the front end of the core shaft, forming a bullet-shaped shape with a gradually expanding diameter at the proximal end, a narrowing in the middle, and a gradually shrinking diameter at the distal end; the waist structure is located in the middle 1 / 3 of the axial length of the cotton fiber body, and the waist diameter is 0.5-1.5 cm; wherein, the waist structure is configured to form an interference fit with the anatomical part of the anal straight ring.

2. The cotton twist according to claim 1, characterized in that The core shaft is made of bamboo, wood, metal, plastic, paper or other materials that meet the safety standards of medical materials; the diameter is 2-5 mm, the length is 15-30 cm, and the front end is blunted (R angle ≥ 1 mm).

3. The cotton twist according to claim 1, characterized in that The minimum waist diameter of the waist-tightening structure is 30%-50% of the maximum diameter of the two ends of the cotton fiber body.

4. The cotton twist according to claim 1, characterized in that The compression density of the cotton fiber body is 0.2-0.3g / cm³, and the amount of liquid medicine adsorbed is not less than 200% of its own weight.

5. The cotton twist according to claim 1, characterized in that: The cotton fiber body can be pre-loaded with Western medicine drugs in the form of powders, liquids, gels, etc. that can stop bleeding, relieve pain, and fight inflammation, or Chinese medicine drugs in the form of ointments, powders, liquids, etc. that can clear away heat and toxins, reduce swelling and relieve pain, remove rot and wounds, activate blood circulation and remove blood stasis, and promote tissue regeneration and wound healing, so as to be convenient for direct clinical use.

6. The cotton twist according to claim 1, characterized in that: The surface of the waist-tightening structure may be embedded with radioactive imaging lines, which are barium-containing composite fibers or pure silver wires with a diameter of 0.05-0.1 mm.

7. A method for using the cotton twist as claimed in any one of claims 1 to 6, comprising the steps of: 1) evenly coating the surface of the cotton fiber body with the desired drug, or adsorbing the cotton fiber body, or pre-loading the desired drug, or not using any drug; 2) pinching the rear end of the core shaft to push the cotton twist into the anus; 3) stopping the advancement when the resistance suddenly increases, at this time tightening the waist and clamping the anal straight ring, pulling out the core shaft, and leaving only the cotton fiber body at the junction of the inner and outer parts of the anus; 4) according to the needs of the disease, after leaving it for the required time, pinch the tail end of the cotton fiber body exposed outside the anus and drag it out, or let it be excreted together with the stool.

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