A multi-lumen pressurized applicator for laser surgery of the vulva

Abstract

The application discloses a multi-cavity pressing type drug delivery operation pen suitable for external genital laser surgery and belongs to the field of medical surgical auxiliary instruments. The pen body of the equipment is provided with four groups of independent and isolated storage cavities, guide sliding grooves and flow guide microchannels, which are respectively loaded with depilatory softening cream, disinfecting gel, medical anesthetic cream and cleaning cream. The four groups of storage cavities are independently controllable to discharge through pressing and pushing components, and a bidirectional anti-leakage structure is formed by cooperating with a one-way static sealing valve core and a piston damping. The pen end is integrated with a waterproof packaged ultraviolet-free cold light LED lighting structure and a detachable flexible silica gel scraping piece. The guide sliding groove is provided with a baffle and a buckling structure matched with a clamping groove body to prevent mistaken pressing, effectively preventing cross-contamination. The application integrates preoperative skin preparation, disinfection, anesthesia, cleaning and lighting verification into one, can be high-temperature sterilized, has precise discharging, strong mucosa adaptability, simplifies the surgical process, avoids cross infection, improves the preoperative pretreatment accuracy and the surgical safety, and is suitable for clinical surgery and animal experiment scenes.

Description

Technical Field

[0001] This invention belongs to the field of medical minimally invasive surgical auxiliary device technology, specifically relating to a multi-cavity press-type drug delivery pen suitable for vulvar laser surgery. Background Technology

[0002] Vulvar laser surgery is a commonly used minimally invasive treatment in clinical gynecology, widely applied to the treatment of vulvar pigmentation disorders, vulvar growths, and vulvar mucosal repair. Because the skin and mucous membranes of the vulva are fragile and sensitive, with many folds, and are adjacent to sterile mucosal areas such as the urethral and vaginal openings, the standardization and safety of preoperative preparation directly determine the surgical outcome and postoperative infection risk.

[0003] Currently, the standardized pre-treatment process for vulvar laser surgery mainly consists of four steps: skin preparation and hair removal, surgical area disinfection, topical anesthesia, and cleaning of residual anesthetic. Traditional procedures require medical staff to sequentially handle various scattered instruments and consumables, such as hair removal cream, disinfectant gel, anesthetic cream, cleansing cream, a special scraper, and a surgical flashlight. This has several drawbacks: First, the repeated switching between multiple instruments and consumables makes the procedure cumbersome, prolongs surgical preparation time, and significantly reduces surgical efficiency. Second, frequent instrument changes can easily lead to cross-infection in the surgical area, failing to meet aseptic surgical standards. Third, the limited angle of traditional handheld light sources makes it difficult to clearly observe skin folds and hair roots, easily resulting in hair removal residue, disinfection blind spots, and anesthetic residue, affecting surgical precision. Fourth, the high hardness of traditional scrapers can easily scratch the delicate vulvar mucosa, causing secondary damage before surgery. Fifth, the separate packaging and storage of various ointments makes precise dosage control difficult, easily leading to material waste or insufficient application, and the instruments are inconvenient to store, occupying a large amount of space on the surgical tray.

[0004] Meanwhile, existing surgical drug delivery devices are mostly single-cavity structures, capable of delivering only a single drug. They cannot meet the multi-step, multi-drug pretreatment needs of vulvar laser surgery, and there is currently no integrated, single-unit dedicated preoperative operating device. Furthermore, they cannot simultaneously meet the adaptation needs of clinical surgery and animal experimental pretreatment scenarios. Based on these shortcomings of existing technologies, there is an urgent need to design a dedicated operating device that integrates multi-drug storage, precise drug delivery, auxiliary cleaning, and surgical area lighting functions. Summary of the Invention

[0005] The purpose of this invention is to address the technical shortcomings of existing pre-treatment instruments for vulvar laser surgery, such as being scattered, cumbersome to operate, prone to cross-infection, having poor lighting effects, easily damaging the mucosa, and having weak adaptability. The invention provides a multi-cavity press-type drug delivery pen suitable for vulvar laser surgery, which integrates the entire process of pre-operative skin preparation, disinfection, anesthesia, cleaning, and verification, simplifying the surgical procedure, improving operational accuracy, and reducing the risk of infection and damage.

[0006] To achieve the above objectives, the present invention employs the following technical means:

[0007] A multi-cavity press-type drug delivery pen suitable for vulvar laser surgery includes a pen body. The pen body has four circumferentially distributed storage cavities on its side, along with corresponding guide grooves and microchannels. The guide grooves and microchannels are located at both ends of their respective storage cavities and communicate with them. An elastic positioning component is connected to the end of each storage cavity near the guide groove. A press-pushing component is slidably inserted into the guide groove, with its pushing end penetrating the elastic positioning component and connecting to the storage cavity. A detachable, pluggable storage component is inserted into each storage cavity. The four storage components are arranged parallel to each other and independently, and are used to load hair removal softening cream, mucosal disinfectant gel, medical anesthetic cream, and sterile cleaning and lubricating cream, respectively.

[0008] The storage assembly includes a cylindrical hollow sealed storage tube. One end of the storage tube is connected to an elastic positioning component, and the other end of the storage tube is connected to a static sealing valve core that is movably inserted into a flow guiding microchannel. An assembly groove is provided at the top of the end of the storage tube near the elastic positioning component. The pushing end of the pressing and pushing component is movably engaged with the assembly groove. A pushing piston adapted to the inner diameter of the tube is slidably sealed inside the storage tube. When the pressing and pushing component is pressed down, it drives the pushing piston to move forward along the axial direction of the storage tube to squeeze the material in the cavity, thereby pressurizing and pushing the material. When the pressing and pushing force is released, the pushing piston is statically locked by the sealing damping of the inner wall, and the static sealing valve core elastically resets and closes, forming a two-way sealing and leak-proof structure.

[0009] The pen body is fixedly connected to an integrated flexible applicator with four chambers at one end near the microchannel. A miniature LED light is embedded in the end face of the flexible applicator, and the miniature LED light is covered with a medical transparent waterproof insulating encapsulating layer. A lithium battery is embedded in the tail of the pen body, and a touch switch is embedded in the side wall of the pen body. The miniature LED light is electrically connected to the lithium battery through the touch switch. A flexible silicone scraper is detachably connected to the outer side of the pen body near the microchannel.

[0010] Preferably, both the pen body and the flexible applicator are made of medical-grade materials that are sterilized at high temperatures.

[0011] Preferably, a snap-fit ​​ring is provided on the outer side of one end of the pen body near the microchannel, and the flexible silicone scraper is detachably snapped and fixed to the snap-fit ​​ring. The flexible silicone scraper can conform to the surface of the flexible applicator to complete the hair removal and residual ointment cleaning operations.

[0012] Preferably, the pressing and pushing component includes a slide rod that is slidably inserted into the guide groove. A limiting block is fixedly connected to the outer side of the slide rod. The limiting block is located outside the guide groove. A push rod is fixedly connected to one end of the slide rod. The push rod passes through the elastic positioning component and is engaged with the assembly slot of the storage component.

[0013] Preferably, the outer side of the guide groove is provided with an anti-misclick buckle structure that is rotatably connected to the pen body to block the limiting block, which can prevent multiple cavities from discharging material at the same time and completely avoid the risk of material mixing.

[0014] Preferably, the anti-misclick buckle structure includes a baffle distributed on one side of the guide slide and rotatably connected to the pen body, and a slot body distributed on the other side of the guide slide and positioned connected to the pen body, wherein the baffle and the slot body are movably engaged.

[0015] Preferably, the elastic positioning component includes a positioning block, which is elastically connected to the inner wall of the storage cavity via a compression spring, thereby achieving elastic positioning assembly and sealing fit of the storage component.

[0016] Preferably, the static sealing valve core is a medical miniature one-way check valve core, which can be either a silicone duckbill valve core or a miniature spring sealing valve core. The valve core is open when pressure is applied and automatically closes when pressure is released, thereby achieving the sealing and blocking of the flow-guiding microchannel and preventing material from flowing, dripping, or flowing back.

[0017] Preferably, the guide microchannels corresponding to each of the storage chambers are independently arranged and do not communicate with each other. The material in each chamber is pushed out independently, without material cross-contamination. Furthermore, the assembly gap between the storage component and the pressing and pushing component is sealed to prevent impurities from entering and material from leaking out.

[0018] Preferably, the miniature LED lighting lamp is a cool white light source without ultraviolet light, and the circuit adopts concealed wiring in the inner wall of the pen body, which does not occupy the storage cavity space and does not come into contact with the drug. It is controlled to start and stop by pressing and holding the touch switch, and is used for soft light illumination of the surgical area and verification of operation effect.

[0019] The present invention has the following beneficial effects:

[0020] 1. Integrated design simplifies surgical procedures: This invention integrates six major functions—hair removal and skin preparation, surgical area disinfection, surface anesthesia, anesthetic drug removal, hair removal, and surgical area lighting—into a single instrument, replacing traditional multiple ointments, scrapers, flashlights, and other scattered instruments. This significantly simplifies the preoperative procedure, shortens surgical preparation time, and improves clinical work efficiency.

[0021] 2. Independent chambers prevent contamination and ensure high aseptic safety: The four-chamber independent isolation structure ensures that each drug channel is not interconnected and that each chamber independently pushes out the drug, completely eliminating the problems of material mixing and cross-contamination; at the same time, a two-way sealing and locking structure is set to effectively prevent material from flowing, dripping, or flowing back. The assembly gap is sealed to prevent impurities from entering, which fully complies with the aseptic operation specifications of the operating room.

[0022] 3. Highly adaptable to mucosa, safe and painless operation: The flexible applicator head and flexible silicone scraper are used together. The soft texture can conform to the folds of the vulvar skin and gently complete the application and scraping operations, avoiding the mucosal scratches and secondary damage caused by traditional hard scrapers; the accompanying medicine is a low-irritation medical formula that is suitable for the delicate mucosal tissue of the private area.

[0023] 4. Built-in illumination verification enhances surgical precision: The embedded cool white light UV-free LED illumination module, with a waterproof and insulated encapsulation design, is not affected by the corrosion or contamination of ointments or materials. It allows for real-time and clear observation of details in the surgical area, accurately identifying issues such as hair removal residue, disinfection blind spots, skin damage, and anesthetic residue, ensuring that pre-operative pretreatment meets standards and improving the precision of laser surgery.

[0024] 5. Precise and controllable dispensing, saving consumables: Adopting a ballpoint pen-style press-and-push structure, the pushing force is gentle and the dispensing amount can be precisely adjusted. It can achieve different application effects such as thin coating and thick application according to needs, avoiding material waste caused by dispensing a large amount of material at once.

[0025] 6. Anti-accidental pressing design, stable operation: Each guide slide is equipped with an independent rotatable anti-accidental pressing buckle structure on the outside. The limit lock is achieved by the movable engagement of the baffle and the slot body. It can effectively lock the limit block of the pressing and pushing component, prevent multiple cavities from being accidentally touched and discharging at the same time, and avoid the risk of material cross-contamination from the structure. The equipment operates stably and reliably. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a structural exploded view of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the press-and-push component of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the material storage assembly of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the miniature LED lighting lamp of the present invention;

[0031] Figure 6 This is a schematic diagram of the anti-accidental pressing buckle structure of the present invention;

[0032] Figure label:

[0033] 1. Pen body body; 2. Touch switch; 3. Lithium battery; 4. Press and push assembly; 5. Guide slide; 6. Elastic positioning assembly; 7. Material storage chamber; 8. Material storage assembly; 9. Flow guide microchannel; 10. Flexible applicator head; 11. Miniature LED light; 12. Encapsulating adhesive layer; 13. Snap ring; 14. Flexible silicone scraper; 15. Anti-accidental press buckle structure.

[0034] Slide rod 401, limit block 402, push rod 403;

[0035] Positioning block 601, compression spring 602;

[0036] Storage pipe 801, assembly groove 802, push piston 803, static sealing valve core 804;

[0037] Baffle 1501, slot body 1502. Detailed Implementation

[0038] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] like Figure 1-6 As shown, this invention provides a multi-cavity press-type drug delivery pen suitable for vulvar laser surgery, comprising a pen body 1, with four circumferentially distributed storage cavities 7 on the side of the pen body 1, and guide grooves 5 and flow microchannels 9 corresponding to the four storage cavities 7. The guide grooves 5 and flow microchannels 9 are respectively distributed at both ends of the corresponding storage cavities 7, and the guide grooves 5 and flow microchannels 9 are all in communication with the corresponding storage cavities 7. An elastic positioning component 6 is connected to the end of the storage cavity 7 near the guide groove 5, and a press-pushing component 4 is slidably inserted into the guide groove 5. The pushing end of the press-pushing component 4 passes through the elastic positioning component 6 and is inserted into the storage cavity 7. A detachable pluggable storage component 8 is inserted into the storage cavity 7. The four storage components 8 are arranged in parallel and independently isolated manner, and are respectively used to load hair removal softening cream, mucosal disinfection gel, medical anesthetic cream, and sterile cleaning and lubricating cream.

[0040] The storage component 8 includes a cylindrical hollow sealed storage tube 801. One end of the storage tube 801 is connected to the elastic positioning component 6, and the other end of the storage tube 801 is connected to a static sealing valve core 804 that is movably inserted into the flow guiding microchannel 9. An assembly groove 802 is provided at the top of the end of the storage tube 801 near the elastic positioning component 6. The pushing end of the pressing and pushing component 4 is movably engaged with the assembly groove 802. A pushing piston 803 adapted to the inner diameter of the tube is slidably sealed inside the storage tube 801. When the pressing and pushing component 4 is pressed down, it drives the pushing piston 803 to move forward along the axial direction of the storage tube 801 to squeeze the material in the cavity, thereby pressurizing and pushing the material. When the pressing and pushing force is canceled, the pushing piston 803 is statically locked by the sealing damping of the inner wall, and the static sealing valve core 804 elastically resets and closes, forming a two-way sealing and leak-proof structure.

[0041] The pen body 1 is fixedly connected to an integrated flexible applicator 10 with four chambers shared by one end near the microchannel 9. A miniature LED light 11 is embedded in the end face of the flexible applicator 10. The miniature LED light 11 is covered with a medical transparent waterproof insulating encapsulating layer 12. A lithium battery 3 is embedded in the tail of the pen body 1. A touch switch 2 is embedded in the side wall of the pen body 1. The miniature LED light 11 is electrically connected to the lithium battery 3 through the touch switch 2. A flexible silicone scraper 14 is detachably connected to the outer side of the pen body 1 near the microchannel 9.

[0042] Both the pen body 1 and the flexible applicator 10 are made of medical-grade materials that have been sterilized at high temperatures.

[0043] The advantages of the above setup are: the instruments can withstand the conventional high-temperature and high-pressure sterilization process in the operating room, can be repeatedly sterilized and reused, are not prone to aging and deformation, and are not prone to the release of harmful substances; they meet the surgical aseptic operation standards throughout the process, effectively avoid infection of the surgical area caused by bacteria carried by the instruments, are suitable for long-term clinical surgery and animal experiment aseptic use scenarios, and significantly reduce the cost of consumables.

[0044] A snap-fit ​​ring 13 is provided on the outer side of the pen body 1 near the flow guide microchannel 9. The flexible silicone scraper 14 is detachably snapped and fixed to the snap-fit ​​ring 13. The flexible silicone scraper 14 can conform to the surface of the flexible applicator head 10 to complete the hair removal and residual ointment cleaning operations.

[0045] The advantages of the above setup are: it adopts a snap-fit ​​detachable structure, which is convenient to install and remove, and is firmly positioned, with no risk of loosening or falling off during use; the flexible silicone material is soft and can conform to the folds and curves of the vulvar mucosa for gentle scraping, completely avoiding the problem of traditional hard scrapers scratching the delicate skin of the private parts; it can be disassembled, disinfected, and replaced separately, avoiding the residual pollution caused by long-term reuse of cleaning parts, realizing integrated application and cleaning, eliminating the need to change multiple instruments, and simplifying the surgical procedure.

[0046] The pressing and pushing component 4 includes a slide rod 401 that is slidably inserted into the guide groove 5. A limiting block 402 is fixedly connected to the outer side of the slide rod 401. The limiting block 402 is located outside the guide groove 5. A push rod 403 is fixedly connected to one end of the slide rod 401. The push rod 403 passes through the elastic positioning component 6 and is engaged with the assembly groove 802 of the storage component 8.

[0047] The advantages of the above setup are as follows: linear guiding transmission is achieved through the sliding cooperation between the guide groove 5 and the slide rod 401, and the push rod 403 and the assembly groove 802 are precisely engaged and limited, ensuring that the pressing process is only axially vertically transmitted, without left or right deviation, shaking or jamming; the outer limit block 402 can limit the maximum pressing stroke, avoiding excessive pressing that could damage the internal structure or cause excessive material extrusion, the discharge stroke is stable and controllable, the transmission accuracy is high, the service life is long, and it effectively ensures that the dosage of each push is uniform and stable.

[0048] The outer side of the guide chute 5 is provided with an anti-misclick buckle structure 15 that is rotatably connected to the pen body 1 to block the limit block 402, which can prevent multiple cavities from discharging at the same time and completely avoid the risk of material mixing.

[0049] The advantages of the above setup are as follows: the external independent mechanical locking structure forms a physical limit on the pressing and pushing component 4, and the pressing stroke can be completely locked in the idle state, eliminating unexpected material discharge caused by accidental touch during operation or accidental pressure during transfer; it realizes independent unlocking of a single chamber and single-chamber operation, eliminating the problem of simultaneous discharge of multiple chambers and mixing of medicines from the root of the mechanical structure, ensuring that the four medicines are used absolutely independently, with extremely high aseptic safety.

[0050] The anti-accidental pressing buckle structure 15 includes a baffle 1501 distributed on one side of the guide slide 5 and rotatably connected to the pen body 1, and a slot body 1502 distributed on the other side of the guide slide 5 and positioned connected to the pen body 1. The baffle 1501 and the slot body 1502 are movably engaged.

[0051] The advantages of the above-mentioned setup are as follows: the snap-fit ​​structure using a rotating baffle 1501 and a fixed slot 1502 is simple, durable, and extremely easy to operate. Medical staff can complete the unlocking and locking operations with one hand without delaying the surgical rhythm; the snap-fit ​​fit has a small gap and a firm lock, making it less prone to loosening or failure under vibration or touch; the split-type fit structure has no exposed fragile small springs, facilitating overall sterilization and cleaning, eliminating hygiene dead corners, and adapting to the stringent sterile environment of the operating room.

[0052] The elastic positioning component 6 includes a positioning block 601, which is elastically connected to the inner wall of the storage cavity 7 via a compression spring 602, thereby achieving elastic positioning assembly and sealing fit of the storage component 8.

[0053] The advantages of the above setup are as follows: by utilizing the elastic yielding characteristics of the compression spring 602, the storage component 8 can be quickly inserted and removed for assembly, with a high assembly error tolerance and convenient disassembly and assembly; after assembly, the spring continuously pushes the positioning block 601, ensuring that the end of the storage component 8 is always tightly fitted to the positioning end face, guaranteeing coaxial assembly accuracy and eliminating assembly gap wobbling; continuous elastic fit can effectively improve the overall sealing of the cavity, avoiding micro-leakage and air intake problems caused by loosening during long-term use, and ensuring the stability of storage and pushing.

[0054] The static sealing valve core 804 is a medical miniature one-way check valve core, which adopts either a silicone duckbill valve core or a miniature spring sealing valve core. The valve core conducts under pressure and automatically closes when pressure is released, realizing the sealing and blocking of the flow guiding microchannel 9, and preventing material from flowing, dripping, or flowing back.

[0055] The advantages of the above setup are: it adopts a unidirectional, automatic reset sealing structure, which only opens the outlet when pressing and pushing the material or when pressurizing the cavity, and automatically closes and seals the channel immediately after stopping the pressing and depressurizing; it can effectively prevent the self-flow and dripping of ointment and gel in the static state, and at the same time prevent external air, impurities and moisture from flowing back into the cavity, avoiding drug contamination and deterioration; the medical silicone material has good biocompatibility, is resistant to sterilization and drug corrosion, has a long sealing life, and is suitable for long-term sterile medical scenarios.

[0056] Each storage chamber 7 has a corresponding guide microchannel 9 that is independently arranged and not interconnected. The material in each chamber is pushed out independently, without cross-contamination. Furthermore, the assembly gap between the storage component 8 and the pressing and pushing component 4 is sealed to prevent impurities from entering and material from leaking out.

[0057] The advantages of the above setup are: multiple channels are completely independent and isolated, with no interconnection between them; the four functional drugs are stored, transported, and discharged in separate zones throughout the entire process, completely eliminating cross-mixing and contamination of drugs from the structure, ensuring that the purity of the drugs meets the standards at each step of the preoperative operation; the assembly gap is sealed to prevent fine dust and moisture from entering the cavity, while preventing drugs from leaking out from the assembly gap, further improving the overall airtightness and aseptic safety of the instrument, and adapting to the needs of refined and high-cleanliness private surgical pretreatment.

[0058] The miniature LED lighting lamp 11 is a cool white light source without ultraviolet light. The circuit adopts concealed wiring in the inner wall of the pen body, which does not occupy the space of the storage cavity 7 and does not come into contact with the medicine. It can be started and stopped by pressing and holding the touch switch 2. It is used for soft light illumination of the surgical area and verification of operation effect.

[0059] The advantages of the above setup are: the light source is soft and gentle, without ultraviolet light, which will not irritate the sensitive vulvar mucosa or damage the skin tissue, making it suitable for minimally invasive procedures in intimate areas; the circuit is concealed, does not occupy the storage cavity space, and does not come into direct contact with the medication, eliminating the dual risks of medication corroding the circuit and circuit contaminating the medication; the touch-sensitive start / stop operation is simple and sensitive, requiring no additional switching components, and the structure is neat and easy to clean and sterilize; it can visualize and verify the surgical area folds, minor residues, and disinfection blind spots in real time, greatly improving the accuracy of preoperative pretreatment and the safety of the surgery.

[0060] Working principle

[0061] This invention relates to a multi-cavity, press-type integrated drug delivery pen designed to adapt to the standardized four-step preoperative procedure for vulvar laser surgery. The pen employs a four-press ballpoint pen-style independent control structure, relying on five core mechanical and electrical structures within the main body: independent isolation and storage of multiple cavities, axial push-press mechanism, one-way sealing and locking, anti-accidental press mechanical limit, and built-in micro LED lighting and power supply. This achieves independent and controllable drug delivery, prevention of cross-contamination and leakage, auxiliary lighting for the surgical area, and integrated cleaning and scraping functions. The overall working principle is divided into six parts: independent drug delivery principle, two-way sealing and leakage prevention principle, anti-accidental press locking and cross-contamination prevention principle, detachable scraper auxiliary working principle, LED soft light lighting and electrical control principle, and detachable cyclic adaptation principle, as detailed below:

[0062] I. Working principle of independent drug delivery

[0063] The main body 1 of this device has four completely independent and unconnected storage chambers 7, guide grooves 5 and flow microchannels 9 evenly arranged around its circumference. Each storage chamber 7 corresponds to a single agent and a single pressing and pushing component 4, realizing one-to-one independent control and eliminating the problem of material cross-contamination from the structural source.

[0064] In the normal static state, the sliding rod 401 of the push-button assembly 4 is slidably limited and assembled using the guide groove 5. The end of the push rod 403 on the inner side of the sliding rod 401 is engaged inside the assembly groove 802 of the storage assembly 8, completing precise alignment and assembly. When a corresponding drug needs to be dispensed, medical staff press the push-button assembly 4 on the outer side of the corresponding cavity. The sliding rod 401 slides axially inward along the guide groove 5, driving the push rod 403 to move forward synchronously. Through the engaged assembly groove 802, the push piston 803 inside the storage tube 801 is precisely driven to perform axial translational movement along the inner wall of the storage tube 801.

[0065] The outer edge of the push piston 803 slides and seals completely against the inner wall of the storage tube 801. During the forward movement of the push piston 803, it squeezes the ointment or gel-like medical materials inside the storage tube 801, generating positive pressure inside the storage cavity 7. The pressurized material overcomes the closing resistance of the front static sealing valve core 804, causing the static sealing valve core 804 to be pressurized and open. The material then flows directly to the front integrated flexible applicator head 10 through the independent guide microchannel 9, achieving uniform application of the medication. The elastic pushing action of the compression spring 602 in the elastic positioning component 6 ensures that the positioning block 601 always tightly contacts the storage component 8, guaranteeing a tight and sealed assembly. Simultaneously, the elastic yielding characteristic of the spring facilitates quick positioning and installation of the storage component 8, allowing it to be snapped into place inside the storage cavity 7, ensuring coaxiality during assembly.

[0066] The four sets of cavity channels are completely independent, and the dispensing does not interfere with each other. They can accurately dispense hair removal softening cream, disinfectant gel, anesthetic cream and cleansing cream according to clinical needs. The pressure and pressing stroke can be controlled autonomously to achieve different drug delivery effects such as thin application and thick application.

[0067] II. Working principle of bidirectional sealing to prevent leakage and backflow

[0068] This equipment is equipped with a front and rear bidirectional locking and sealing system, which completely solves the problems of material self-flow, dripping, and negative pressure backflow in the static and reset states, ensuring the sterility and stable use of the instrument.

[0069] 1. Static sealing of the rear piston: The push piston 803 remains absolutely still by relying on the tight sealing damping between its outer edge and the inner wall of the storage tube 801. It will not move forward to push material or slide backward on its own. This prevents the push piston 803 from generating negative pressure by moving backward and drawing air and impurities into the storage chamber 7, while also preventing material from leaking out on its own.

[0070] 2. Front-end valve core elastic seal: The discharge end of the equipment is equipped with a medical one-way check valve core 804 silicone duckbill type / miniature spring type, which only conducts pressure relief when the material is under pressure; when the pressing stops and the internal pressure of the storage chamber 7 disappears, the static sealing valve core 804 automatically and quickly resets and closes by its own elasticity, completely blocking the discharge port of the guide microchannel 9 and blocking the material leakage channel.

[0071] The front and rear bidirectional sealing structures work together to form a completely sealed independent space in the non-working state, with no self-flow, no dripping, no backflow, and no impurities entering, meeting the requirements for sterile medication use in the operating room.

[0072] III. Working principle of preventing accidental locking and preventing material cross-contamination in multiple cavities

[0073] To address the issues of accidental activation and material contamination caused by simultaneous discharge from multiple cavities in multi-button devices, this equipment features an independent anti-accidental activation buckle structure on the outer side of each guide chute 5, enabling independent unlocking and separate operation of each cavity, thus completely eliminating the risk of material contamination.

[0074] The anti-accidental press buckle consists of a rotatable baffle 1501 and a fixed slot 1502. The baffle 1501 is rotatably connected to the pen body 1, and the slot 1502 is fixed to the other side of the guide slide 5. In the normal idle state, the baffle 1501 rotates and engages with the slot 1502, forming a lateral limiting barrier that completely blocks and obstructs the limiting block 402 on the outside of the pressing and pushing component 4, restricting the slide bar 401 from sliding inward. The button is in a locked state and cannot be pressed to dispense material.

[0075] When the corresponding cavity needs to be used for drug delivery, simply rotate the baffle 1501 to disengage it from the slot 1502, releasing the limiting block 402. The pressing and pushing component 4 of that cavity can then slide and press normally to complete the dispensing operation. For the other cavities that are not unlocked, the baffle 1501 remains locked to the slot 1502, and the pressing and pushing component 4 cannot be triggered. The four sets of latches are independently controlled, ensuring that only one cavity works at a time, completely eliminating the problem of simultaneous dispensing from multiple cavities and drug mixing from a mechanical structure perspective.

[0076] IV. Working Principle of Detachable Scraper

[0077] A ring-shaped retaining ring 13 is provided on the outer side of the discharge end of the pen body 1 near the microchannel 9. The flexible silicone scraper 14 can be quickly assembled, disassembled and replaced by the retaining ring 13. In the skin preparation, hair removal and residual anesthetic cleaning process, the retaining flexible silicone scraper 14 can closely fit the surface of the flexible applicator head 10. With the help of the fitting curvature of the flexible applicator head 10, it can gently scrape away the softened and detached hair and residual ointment.

[0078] Compared to traditional hard scrapers, the flexible silicone scraper 14 made of medical-grade flexible silicone will not scratch the delicate vulvar mucosa. It can be adapted to clean skin folds, realizing integrated operation of drug administration, softening, scraping and cleaning without the need to change to additional instruments.

[0079] V. Working Principle of LED Soft Lighting and Electrical Control

[0080] The device employs a built-in concealed power supply and lighting system to provide sterile and safe soft lighting for pre- and post-operative surgical area verification. The main body 1 of the pen has a sealed rechargeable lithium battery 3 embedded in its tail, which serves as the sole power source. The circuit is concealed along the inner wall of the main body 1, without occupying the space of the storage chamber 7 or coming into contact with medical agents, thus eliminating the problems of circuit contamination and drug corrosion of the circuit.

[0081] The front flexible applicator 10 has a built-in miniature LED light 11, and the outside of the miniature LED light 11 is completely covered with a medical transparent waterproof insulating encapsulating adhesive layer 12 to achieve complete sealing and isolation, completely preventing the erosion of ointments, gels and other materials, and ensuring the long-term stable operation of the lighting module.

[0082] The pen body 1 has an integrated touch switch 2 embedded in its side wall. By pressing and holding the touch switch 2, the lighting module of the miniature LED light 11 can be turned on and off. The miniature LED light 11 is designed to be free of ultraviolet light, and the light is soft and does not irritate the sensitive mucous membranes of the private area. It can clearly observe the details of hair residue, disinfection blind spots, skin damage, and anesthetic residue in the surgical area, and complete the standardized preoperative verification to ensure the safety of the surgery.

[0083] VI. Working principle of detachable and reusable adapter

[0084] All storage components 8 adopt a tail-plug-in detachable structure, which can be individually removed from the tail of the pen body 1 to achieve independent drug filling and consumable replacement. After disassembly and reassembly, precise sealing can be achieved again. Each storage component 8 is compatible with low-irritation human mucosal medical consumable formulas and animal experimental consumable formulas. By changing different consumables, it can be adapted to both clinical vulvar laser surgery and preoperative pretreatment in animal experiments. The equipment has extremely high versatility, and the pen body 1 as a whole can be sterilized at high temperature and can be repeatedly reused.

[0085] Example 1: Standardized Complete Example of Clinical Vulvar Laser Surgery

[0086] This embodiment is a standardized pre-treatment application for routine vulvar laser freckle removal and bio-surgery in gynecological clinics. It is adapted to low-irritation operation scenarios of the human private mucosa and adopts a four-cavity full-function matching mode.

[0087] Equipment Assembly: Before the procedure, the pen body 1 is sterilized under high temperature and pressure. The four storage components 8 are then removed from the tail of the pen body 1 and individually filled with the corresponding medical consumables: Storage chamber 1 7 is filled with a gentle vulvar hair removal softening cream; storage chamber 2 7 is filled with benzalkonium chloride disinfectant gel for mucous membranes; storage chamber 3 7 is filled with lidocaine numbing cream; and storage chamber 4 7 is filled with sterile cleaning and lubricating cream. After filling, the storage chambers 7 are reinserted. Utilizing the elastic recoil characteristic of the compression spring 602 of the elastic positioning component 6, the positioning block 601 is tightly pressed against the end of the storage tube 801, ensuring a coaxial, sealed assembly of the storage components 8 without any gaps or leakage. The flexible silicone scraper 14 is then snapped onto the front retaining ring 13 of the pen body 1, completing the preoperative assembly.

[0088] Preventing accidental pressing and locking: Before the operation, all the baffles 1501 on the outside of the four sets of guide slides 5 are rotated and inserted into the slot body 1502 to form a mechanical limit lock on the limit block 402 of the pressing and pushing component 4, so as to avoid accidental contact with the discharge during the transfer and preparation process, which may cause material contamination.

[0089] Step-by-step surgical procedure:

[0090] 1. Surgical area lighting verification: Press and hold the touch switch 2 on the side wall of the pen body 1 to turn on the miniature LED light 11. With the waterproof and sealed protection of the encapsulating adhesive layer 12, it outputs a soft, cool light without ultraviolet rays, allowing clear observation of the skin folds, hair distribution, and mucosal integrity of the vulvar surgical area, and checking for abnormalities such as damage and inflammation.

[0091] 2. Skin preparation and hair removal: Rotate the baffle 1501 corresponding to cavity 1 to disengage from the slot 1502, releasing the lock. Press the corresponding pressing and pushing component 4. The slide rod 401 slides inward along the guide groove 5. The push rod 403 drives the pushing piston 803 forward through the assembly groove 802, squeezing the hair removal softening cream to open the static sealing valve core 804. The cream is then delivered to the flexible application head 10 through the guide microchannel 9 and evenly thinly applied to the hair area. Allow it to stand for the preset softening time. After softening, gently scrape off the detached hair using the fixed flexible silicone scraper 14, without the risk of mucosal abrasion.

[0092] 3. Disinfection of surgical area: Lock cavity 1, unlock cavity 2, press push component 4 to squeeze out disinfectant gel, apply evenly to surgical area and the outer 5cm skin area, let it air dry naturally to kill bacteria, and complete the preoperative disinfection with full coverage.

[0093] 4. Surface anesthesia treatment: After the disinfected area is completely dry, lock chamber 2, unlock chamber 3, press to dispense a thick layer of lidocaine anesthetic ointment, cover with plastic wrap and seal for anesthesia to block the pain nerves on the skin surface.

[0094] 5. Residual anesthetic removal: After the anesthesia duration reaches the target, lock cavity 3 and unlock cavity 4. Squeeze out sterile cleaning and lubricating cream, and gently scrape away all residual anesthetic cream with a flexible silicone scraper 14. Wipe clean with sterile gauze to avoid irritation of the mucous membrane by residual anesthetic.

[0095] 6. Final preoperative verification: Turn on the miniature LED lighting 11 again to verify the surgical area from multiple angles, confirming that the hair is clean, the disinfection is fully covered, there is no anesthetic residue, and the skin is undamaged. Once all preoperative pretreatment is completed, laser surgery can be performed.

[0096] Example 2: Preoperative treatment for animal experiments

[0097] This embodiment is adapted to laser skin modeling and pre-operative treatment scenarios for minimally invasive experiments in experimental animals such as rats and mice. It simplifies drug compatibility and focuses on achieving the core functions of hair removal, cleaning, and disinfection, while adapting to the tolerance characteristics of animal skin.

[0098] Equipment Modification and Consumable Adaptation: Disassemble all storage components 8 and replace them with animal-specific consumable formulas. Fill storage chamber 1 7 with animal-specific rapid hair removal cream and storage chamber 3 7 with animal-specific iodine disinfectant gel. Storage chambers 2 and 4 7 are left empty and sealed, without the need for filling. During assembly, the compression spring 602 pushes the positioning block 601 to ensure a tight seal on the storage tube 801. The empty chambers remain in a statically sealed, locked state with the valve core 804 closed, preventing dust and impurities from entering.

[0099] Operating Procedure: After securing the experimental animal, unlock chamber 1 and press the push component 4 to squeeze out the hair removal cream and apply it evenly to the prepared skin area. Let it sit to soften the hair. Use the flexible silicone scraper 14 at the front end, which is attached to the flexible applicator 10, to quickly scrape off the softened hair and clean up skin debris. Then, lock chamber 1 and unlock chamber 3, squeeze out the disinfectant gel and apply it evenly to the experimental area to complete the sterilization process. Throughout the process, the miniature LED light 11 can be turned on to assist in observing the cleanliness and condition of the prepared skin. After the pretreatment is completed, turn off the power to the device, lock all anti-accidental pressing latches, and complete the pre-operative preparation for the animal experiment.

[0100] This embodiment utilizes the independent isolation feature of multiple chambers in the equipment. Empty chambers are completely sealed to prevent material from mixing. Only the functional chambers are activated, which is adapted to the simplified operation requirements of animal experiments. It is a dual-purpose machine that does not require the replacement of instruments.

[0101] Example 3: A simplified emergency vulvar laser surgery procedure

[0102] This embodiment is applicable to emergency minimally invasive surgical scenarios such as superficial vulvar growths and laser repair of superficial injuries in the emergency department. It pursues rapid operation, streamlined process, high efficiency and safety, simplifies the waiting steps, and prioritizes the timeliness of the operation.

[0103] Equipment status: The pen body 1 is pre-sterilized and ready for use; the four sets of material storage components 8 are normally fully loaded with clinical standard drugs; the equipment lithium battery 3 is fully charged and in standby mode; all pressing and pushing components 4 are normally in the anti-accidental pressing latching lock state to avoid leakage when idle.

[0104] Emergency rapid operation: After emergency admission, directly unlock cavity 1 and cavity 2 and operate quickly in sequence. Apply a thin layer of hair removal softening cream to quickly clean the excess hair in the surgical area. After immediate scraping and cleaning, apply disinfectant gel and let it air dry for sterilization. For superficial minimally invasive surgery, apply a small amount of numbing cream as needed. After a short rest, use cavity 4 cleaning cream to quickly wipe and smooth the surgical area. No long-term occlusion anesthesia is required.

[0105] Intraoperative real-time verification: The miniature LED lighting 11 is turned on in low-brightness soft light mode throughout the procedure to observe the cleaning and disinfection status of the surgical area in real time, promptly identify tiny hair residues and disinfection blind spots, and quickly perform supplementary operations. Relying on the equipment's bidirectional sealing structure, during emergency rapid and repeated pressing, the push piston 803 does not slip, the static sealing valve core 804 does not leak, and there is no cross-contamination of materials or drug drips during multi-step rapid switching.

[0106] Postoperative care: After the surgery, lock all baffles 1501 and card slots 1502, remove the flexible silicone scraper 14 and sterilize it separately, remove the material storage component 8 to replenish consumables, sterilize and store the pen body 1 as a whole, and the equipment can be quickly reused.

[0107] The examples provided in this invention are not intended to limit the implementation. Those skilled in the art will recognize that various variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations, and any obvious variations or modifications derived therefrom are still within the scope of this invention.

Claims

1. A multi-cavity press-type drug delivery pen suitable for vulvar laser surgery, comprising a pen body (1), characterized in that: The pen body (1) has four sets of circumferentially distributed storage cavities (7) on its side, as well as guide grooves (5) and flow guiding microchannels (9) corresponding to the four sets of storage cavities (7). The guide grooves (5) and flow guiding microchannels (9) are respectively distributed at both ends of the corresponding storage cavities (7), and the guide grooves (5) and flow guiding microchannels (9) are all connected to the corresponding storage cavities (7). An elastic positioning component (6) is connected to the end of the storage cavity (7) near the guide groove (5). A pressing and pushing component (4) is slidably inserted into the guide groove (5). The pushing end of the pressing and pushing component (4) passes through the elastic positioning component (6) and is inserted into the storage cavity (7). A detachable pluggable storage component (8) is inserted into the storage cavity (7). The four sets of storage components (8) are arranged in parallel and independently isolated from each other, and are used to load hair removal softening cream, mucosal disinfection gel, medical anesthetic cream and sterile cleaning and lubricating cream, respectively. The storage component (8) includes a cylindrical hollow sealed storage tube (801). One end of the storage tube (801) is in contact with the elastic positioning component (6), and the other end of the storage tube (801) is connected to a static sealing valve core (804) that is movably inserted into the flow guiding microchannel (9). An assembly groove (802) is provided at the top of the end of the storage tube (801) near the elastic positioning component (6). The pushing end of the pressing and pushing component (4) is movably engaged with the assembly groove (802). The storage tube (801) is fitted with a sliding sealing push piston (803) that is adapted to the inner diameter of the tube. When the pressing and pushing component (4) presses down, it drives the push piston (803) to move forward along the axial direction of the storage tube (801) to squeeze the material in the cavity, thereby pressurizing and pushing the material. When the pressing and pushing force is canceled, the push piston (803) is statically locked by the sealing damping of the inner wall, and the static sealing valve core (804) is elastically reset and closed, forming a two-way sealing and leak-proof structure. The pen body (1) is fixedly connected to a four-chamber integrated flexible applicator (10) at one end near the flow channel (9). A miniature LED light (11) is embedded in the end face of the flexible applicator (10). The miniature LED light (11) is covered with a medical transparent waterproof insulating encapsulating layer (12). A lithium battery (3) is embedded in the tail of the pen body (1). A touch switch (2) is embedded in the side wall of the pen body (1). The miniature LED light (11) is electrically connected to the lithium battery (3) through the touch switch (2). A flexible silicone scraper (14) is detachably connected to the outer side of the pen body (1) near the flow channel (9).

2. The multi-cavity press-type drug delivery pen for vulvar laser surgery according to claim 1, characterized in that: Both the pen body (1) and the flexible applicator (10) are made of medical materials that are sterilized at high temperatures.

3. The multi-cavity press-type drug delivery pen for vulvar laser surgery according to claim 1, characterized in that: The pen body (1) has a snap ring (13) on the outer side of one end near the flow guide microchannel (9). The flexible silicone scraper (14) is detachably snapped and fixed to the snap ring (13). The flexible silicone scraper (14) can fit against the surface of the flexible applicator (10) to complete the hair removal and residual ointment cleaning operations.

4. The multi-cavity press-type drug delivery pen for vulvar laser surgery according to claim 1, characterized in that: The pressing and pushing component (4) includes a slide rod (401) that is slidably inserted into the guide groove (5). A limiting block (402) is fixedly connected to the outer side of the slide rod (401). The limiting block (402) is located outside the guide groove (5). A push rod (403) is fixedly connected to one end of the slide rod (401). The push rod (403) passes through the elastic positioning component (6) and is engaged with the assembly groove (802) of the storage component (8).

5. A multi-cavity press-type drug delivery pen suitable for vulvar laser surgery according to claim 1, characterized in that: The outer side of the guide groove (5) is provided with an anti-misclick buckle structure (15) that is rotatably connected to the pen body (1) to block the limit block (402), which can prevent multiple cavities from discharging material at the same time and completely avoid the risk of material mixing.

6. A multi-cavity press-type drug delivery pen suitable for vulvar laser surgery according to claim 5, characterized in that: The anti-misclick buckle structure (15) includes a baffle (1501) distributed on one side of the guide slide (5) and rotatably connected to the pen body (1), and a slot body (1502) distributed on the other side of the guide slide (5) and positioned connected to the pen body (1). The baffle (1501) and the slot body (1502) are movably engaged.

7. A multi-cavity press-type drug delivery pen for vulvar laser surgery according to claim 1, characterized in that: The elastic positioning component (6) includes a positioning block (601), which is elastically connected to the inner wall of the storage cavity (7) through a compression spring (602) to realize the elastic positioning assembly and sealing fit of the storage component (8).

8. A multi-cavity press-type drug delivery pen for vulvar laser surgery according to claim 1, characterized in that: The static sealing valve core (804) is a medical miniature one-way check valve core, which adopts either a silicone duckbill valve core or a miniature spring sealing valve core. The valve core is open when pressure is applied and automatically closes when pressure is released, thereby achieving the sealing and blocking of the flow guiding microchannel (9) and preventing material from flowing, dripping, or flowing back.

9. A multi-cavity press-type drug delivery pen suitable for vulvar laser surgery according to claim 1, characterized in that: Each of the storage chambers (7) has a corresponding flow guide microchannel (9) that is independently arranged and not interconnected. The material in each chamber is pushed out independently, without cross-contamination. The assembly gap between the storage component (8) and the pressing and pushing component (4) is sealed to prevent impurities from entering and material from leaking out.

10. A multi-cavity press-type drug delivery pen for vulvar laser surgery according to claim 1, characterized in that: The miniature LED lighting lamp (11) is a cool white light source without ultraviolet light. The circuit adopts a concealed wiring method with the inner wall of the pen body, which does not occupy the space of the storage cavity (7) and does not come into contact with the drug. It can be started and stopped by pressing the touch switch (2) for soft light illumination of the surgical area and verification of the operation effect.

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