Doser for inhalation anesthetic

Abstract

The invention relates to the technical field of medical instruments, in particular to an inhalation anesthetic doser which comprises a doser body, the doser body comprises a bottle sealing gasket, a spring support, a spring, a spring seat, a doser inner sealing gasket, a sliding rod, a doser body, an O-shaped ring, a doser cover sealing gasket and a doser cover. The spring seat and the sliding rod are in interference fit to form a combined body I; a sealing gasket in the doser is fixed at the joint of the spring seat and the sliding rod, the spring is arranged on the spring seat, a core rod of the spring seat penetrates through a central hole of the spring frame, the first combination body penetrates into the central hole of the doser body from the top, and the contact surface of the spring frame and the doser body is fastened and connected; the spring seat, the doser inner sealing gasket and the sliding rod form a combined body II; the automatic medicine adding device has the functions of uniqueness recognition of medicine, closed medicine adding and repeated use, the automatic medicine adding function is achieved under the medicine adding opening of a matched structure, operation errors and medicine waste are avoided, environmental pollution is reduced, and physical labor of medical staff is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a dosing device for inhaled anesthetics. Background Technology

[0002] In medicine, inhalable liquid anesthetics are vaporized by an anesthetic vaporizer and inhaled through the respiratory tract, causing temporary loss of consciousness without pain. This is the main method of general anesthesia in medicine. Known anesthetics are usually stored in liquid form in suitable containers such as glass or aluminum bottles, and the anesthetic vaporizer needs to be replenished before or during surgery.

[0003] There are two common methods of drug administration. One is direct infusion, which is an open method where the anesthetic is poured directly into the anesthetic vaporizer. This method can only be performed before surgery, and it is not possible to replenish the drug during surgery without stopping the machine. Although this method is simple, due to atmospheric pressure, the liquid at the bottle outlet will flow intermittently and gurglingly. Careless operation can lead to the risk of liquid spillage. In addition, a small amount of evaporation will occur during the drug administration process, which not only wastes anesthetic but also pollutes the working environment. The internationally accepted requirement for the exhaust concentration of halogenated anesthetic drugs is not to exceed 2 PPM. In the small space of the working area, the leakage generated during the drug administration process can threaten the health of medical personnel.

[0004] Another method involves using a dosing device as a packaged component of the drug bottle or as an adapter to add the anesthetic to the vaporizer. This type of dosing device typically uses an internal sealing device to isolate the anesthetic from the vaporizer before dispensing. During use, the sealing structures of the vaporizer and the dosing device are opened simultaneously or in stages through relevant mechanical structures, thereby enabling the anesthetic to flow from the drug bottle into the vaporizer and thus achieving the dispensing function.

[0005] Currently available dosing devices can administer anesthesia vaporizers without heating or pressurization. However, with increasing clinical demands, high-precision electrically controlled anesthesia vaporizers require heating or pressurization. Under high pressure, traditional dosing devices require continuous pressing of the drug bottle to prevent the dosing device and drug bottle assembly from being pushed out of the dosing port. Prolonged pressing can lead to operator fatigue, and accidental dislodgement can pose a safety risk. Summary of the Invention

[0006] The purpose of this invention is to address the deficiencies and shortcomings of the prior art by providing a dosing device for inhaled anesthetics.

[0007] The present invention provides a dosing device for inhaled anesthetics, comprising a dosing device, which includes a bottle sealing gasket, a spring frame, a spring, a spring seat, an inner sealing gasket for the dosing device, a slide rod, a dosing device body, an O-ring, a dosing device cover sealing gasket, and a dosing device cover; The spring seat and slide rod are interference-fitted to form assembly one. The inner sealing gasket of the dosing device is fixed at the junction of the spring seat and the slide rod. The spring is placed on the spring seat, and the core rod of the spring seat passes through the central hole of the spring frame. Assembly one is inserted into the central hole of the dosing device body from the top. The contact surface between the spring frame and the dosing device body is fastened. Assembly two, formed by the spring seat, the inner sealing gasket of the dosing device, and the slide rod, can move upward along the central axis by pressing. Under the action of the spring, it can automatically reset and complete the isolation and sealing of the bottle from the outside world. The dosing device cap sealing gasket is fixed to the bottom of the dosing device cap. The assembly is connected to the lower internal thread of the dosing device body through the external thread of the central protrusion. The dosing device cap sealing gasket is squeezed and sealed with the lower lip of the dosing device body, completing the secondary isolation and sealing between the medicine in the bottle and the outside world.

[0008] Furthermore, the slide bar is a cylinder with several protrusions around its perimeter, a hole in the center, and a boss structure at the top. The boss structure is fixed to the recess of the spring seat, forming a firm fit.

[0009] Furthermore, the spring frame and the dosing device body can be fused together into a single structure by ultrasonic welding.

[0010] Furthermore, the spring frame has a central guide hole and a four-sided support structure.

[0011] Furthermore, the O-ring is placed at the sealing groove feature D of the dosing device body to achieve mutual sealing between the dosing device and the matching dosing port.

[0012] Furthermore, the neck of the main body of the dosing device has a protrusion feature, which is set in hexagon, pentagon, quadrilateral or irregular shape, etc., as a unique identification feature for each anesthetic. When matched with a dosing port of the same shape, it can be inserted smoothly. When matched with a dosing port of different shapes, it cannot be inserted due to the limitation of the corners.

[0013] The beneficial effects of this invention are as follows: The inhalation anesthetic dispenser described in this invention has bidirectional unique identification, preventing both the dispenser from being connected to the wrong drug and the incorrect dispenser from being inserted into the anesthetic vaporizer's dispensing port; its fully enclosed dispensing process effectively isolates it from the external environment, avoiding waste and environmental pollution; its reusable function reduces raw material consumption and recycling, lowering usage costs; and when used with a matching dispensing port, it enables automatic dispensing, reducing physical labor for medical personnel and improving safety during use. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate the invention and form part of this application, are not intended to unduly limit the scope of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the core structure of the dosing device in this invention; Figure 4 This is a schematic diagram of the main features of the dosing device of the present invention; Figure 5 This is a schematic diagram of the main features of the dosing device of the present invention. Figure 2 ; Figure 6 This is a schematic diagram illustrating the unique features of the main body of the dosing device of the present invention; Figure 7 This is a schematic diagram of the connection structure between the dosing device and the bottle of the present invention; Figure 8 This is a schematic diagram of the matching structure of the dosing port corresponding to the present invention; Figure 9 This is a schematic diagram of the matching structure between the dosing device and the dosing port of the present invention. Figure 1 ; Figure 10 This is a schematic diagram of the matching structure between the dosing device and the dosing port of the present invention. Figure 2 ; Figure 11 This is a schematic diagram of the matching structure between the dosing device and the dosing port of the present invention. Figure 3 ; Figure 12 This is a schematic diagram of the matching structure between the dosing device and the dosing port of the present invention. Figure 4 ; Figure 13 This is a schematic diagram of the matching structure between the dosing device and the self-locking dosing port of the present invention. Figure 1 ; Figure 14 This is a schematic diagram of the matching structure between the dosing device and the self-locking dosing port of the present invention. Figure 2 ; Figure 15 This is a schematic diagram of the matching structure between the dosing device and the self-locking dosing port of the present invention. Figure 3 ; Figure 16 This is a schematic diagram of the matching structure between the dosing device and the self-locking dosing port of the present invention. Figure 4 ;; Explanation of reference numerals in the attached figures: 1-Reagent bottle; 2-Neck ring; 3-Dosing device; 301-Bottle sealing gasket, 302-Spring frame, 303-Spring, 304-Spring seat, 305-Dosing device inner sealing gasket, 306-Slide rod, 307-Dosing device body, 308-O-ring, 309-Dosing device cover sealing gasket, 310-Dosing device cover; 307A - Drug identification feature; 307B - Conical boss feature; 307C - Dosing nozzle identification feature; 307D - Dosing nozzle body sealing groove; 401-Injection port a, 402-Injection port sealing gasket a, 403-Push rod a, 404-Spring b, 405-Drug reservoir; 401A - Identification features of the dosing device port; 501-Limit pin, 502-Unlock button, 503-Injection port b, 504-Return spring, 505-Push rod assembly, 506-Spring b, 507-Drug reservoir b; 503A - Slide groove, 503B - Dosing nozzle identification feature, 503C - Fixed column. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0016] like Figures 1-3 As shown in this specific embodiment, a dosing device for an inhaled anesthetic includes... The dosing device 3 includes a bottle sealing gasket 301, a spring frame 302, a spring 303, a spring seat 304, an inner sealing gasket 305, a slide rod 306, a dosing device body 307, an O-ring 308, a dosing device cover sealing gasket 309, and a dosing device cover 310. The spring seat 304 and the slide rod 306 are interference-fitted to form assembly one. The inner sealing gasket 305 of the dosing device is fixed at the junction of the spring seat 304 and the slide rod 306. The spring 303 is placed on the spring seat 304. The core rod of the spring seat 304 passes through the central hole of the spring frame 302. Assembly one is inserted into the central hole of the dosing device body 307 from the top. The contact surfaces of the spring frame 302 and the dosing device body 307 are fastened together. Assembly two, formed by the spring seat 304, the inner sealing gasket 305 of the dosing device, and the slide rod 306, can move upward along the central axis by pressing. Under the action of the spring 303, it can automatically reset and complete the isolation and sealing of the bottle from the outside world. In this design, the slide bar 306 is a cylinder with several protrusions around its perimeter, a hole in the center, and a boss structure on the top. The boss structure can achieve a firm and secure fit with the spring seat 304 and complete the function of fixing the sealing gasket 305 inside the dosing device. The gap between the circumferential protrusions and the cylinder and the central hole can allow liquid and gas to pass through.

[0017] The dosing device cover sealing gasket 309 is fixed to the bottom of the dosing device cover 310. The assembly is connected to the lower internal thread of the dosing device body 307 through the external thread on the central protrusion. The dosing device cover sealing gasket 309 is squeezed and sealed with the lower lip of the dosing device body 307, thus completing the secondary isolation and sealing between the medicine in the bottle and the outside world.

[0018] Furthermore, the spring frame 302 and the dosing device body 307 can be fused into a single integrated structure by ultrasonic welding. In this design, the spring frame 302 has a central guide hole and a four-sided support structure, which allows liquids and gases to pass through while providing a spring fixing support.

[0019] Furthermore, the O-ring 308 is placed at the sealing groove feature 307D of the dosing device body 307 to achieve mutual sealing between the dosing device 3 and the matching dosing port.

[0020] like Figures 4-5 As shown, the main body 307 of the dosing device in this design has a feature slot 307A that mates with the bottleneck ring 2; a feature conical boss 307B; a feature boss 307C; and a feature groove 307D.

[0021] like Figure 6 As shown, the boss defines four commonly used inhaled anesthetics (enflurane, isoflurane, halothane, and sevoflurane) with shapes 307C-a, 307C-b, 307C-c, and 307C-d, respectively. The shapes shown are polygons and irregular shapes with equal inscribed circles, which construct a unique physical structure that is non-repeating and non-interconnected.

[0022] like Figure 7 As shown, feature 307A of the dosing device 3 matches the neck ring 2. After the match is complete, the thread at the front end of the medicine bottle 1 can be connected and tightened with the internal thread of the dosing device 3. Since the neck ring 2 and the front end thread of the medicine bottle 1 are uniquely specified by relevant international / national / industry standards, this technical solution will not elaborate on them.

[0023] like Figure 8 As shown, the design matches the limiting and unique identification features of the dosing port. The concave shapes 307C-a, 307C-b, 307C-c, and 307C-d correspond to the same features, and their depths are consistent with the height of the protrusions in feature 307C.

[0024] This design completes the anesthetic administration process in a closed environment, avoiding leakage and reducing environmental hazards. It also prevents personnel from inhaling anesthetic gases that escape into the atmosphere, protecting the health of medical staff. Furthermore, the closed administration process allows for administration during surgery and solves the problem of drug delivery when the internal pressure of the drug reservoir is high after heating or pressurization.

[0025] This design employs a unique design, corresponding one-to-one with existing drugs, thus solving the problem of incorrect drug dispensing.

[0026] This design can be used for filling conventional non-heated pressurized evaporators, as well as for filling heated or pressurized evaporators.

[0027] This design, along with the matching dosing port, employs an automatic locking mechanism with a sliding limit pin and a press-to-unlock method, enabling automatic dosing. This simplifies the dosing process, improves safety, and reduces the workload for users.

[0028] Specific implementation example of the present invention, Figures 9-12 Example of administering medication to a standard anesthesia vaporizer: Figure 9 The dosing device 3 is inserted into the empty insertion section of the dosing port 401, and there is no contact or change between the dosing device 3 and the dosing port 401.

[0029] Figure 10 The insertion section is designed for unique limiting. When the dosing device feature 307C and the dosing port identification feature 401A are completely matched, insertion can be completed. If they cannot be matched, insertion cannot be completed to prevent incorrect drug dispensing. At the end of this section, the dosing device O-ring 308 is squeezed and deformed by the sealing groove 307D feature of the dosing device body and the inner diameter of the dosing port 401, thus completing the sealing of the dosing device 3 and the dosing port 401 to the outside.

[0030] Figure 11 This is an indication that the dosing port is open. At this time, with the continuous insertion of the dosing device 3, the dosing port push rod 403 drives the sealing gasket 402 to move down, and the dosing port seal is opened. Figure 12 This diagram illustrates the opening of the dosing device 3. At this point, the dosing port push rod 403 reaches the bottom, providing rigid support. The dosing device 3 continues to descend, and the push rod 403 pushes the slide rod 306, causing the sealing gasket 305 to move upwards. The dosing device's sealing structure opens. Under the influence of gravity and pressure, the liquid inside the bottle exchanges gas with the gas in the drug storage body, completing the drug dispensing. When the liquid level reaches the sealing structure at the dosing port, the gas-liquid exchange stops, and the drug no longer enters the drug storage body. When the dosing device is pulled out, the spring 303 acts on the spring seat 304, forcing the spring seat 304 to first complete the sealing structure return of the dosing device's inner seal 305 and slide rod 306. After further pulling out, the dosing port sealing structure returns to its original position under the action of the spring 404, ultimately separating the dosing device from the dosing port.

[0031] Specific implementation example two of the present invention Figures 13-16 Example of drug administration using a high-pressure anesthesia vaporizer: Figure 13 The dosing device 3 is inserted into the empty insertion section of the dosing port 503, and there is no contact or change between the dosing device 3 and the dosing port; Figure 14The insertion section is designed for unique limiting. When the dosing device feature 307C and the dosing port identification feature 503B are completely matched, insertion can be completed. If they cannot be matched, insertion cannot be completed to prevent incorrect drug dispensing. At the end of this section, the O-ring 308 of the dosing device 3 is squeezed and deformed by the sealing groove 307D feature of the dosing device body and the inner diameter of the dosing port 503, thus completing the sealing of the dosing device 3 and the dosing port 503 to the outside. Figure 15 This diagram illustrates the sealing of the dosing port and the opening of the dosing device 3. With the continuous insertion of the dosing device 3, the lip of the dosing device contacts the top of the push rod assembly 505, pushing the push rod downwards. The dosing port seal opens, and simultaneously, the dosing port feature fixing post 503C contacts the lower end face of the slide rod 306, pushing the slide rod 306 to move the dosing device's inner sealing gasket 305 upwards. The dosing device seal opens, and under the action of gravity and pressure, the liquid inside the bottle exchanges gas with the gas in the drug storage body, completing the drug dispensing. When the liquid level reaches the sealing structure of the dosing port, the gas-liquid exchange stops, and the drug is not dispensed. Then, as the dosing device enters the storage body, during the initial downward movement of the dosing device, the characteristic conical protrusion 307B of the dosing device pushes the limiting pin 501 to slide along the characteristic groove 503A of the dosing port. After the characteristic conical protrusion 307B passes the position of the limiting pin 501, the limiting pin 501 automatically returns to its original position and locks onto the upper neck of the characteristic conical protrusion 307B of the dosing device by relying on the upward reset function of the spring 504 and the unlocking block 502, preventing the dosing device 3 from popping out. At this time, both the dosing port seal and the dosing device seal are in the open state. After that, the drug dispensing is completed automatically without manual intervention. Figure 16 This is a diagram illustrating rapid drug administration; the drug administration process continues at this stage. Figure 15 In this state, manual pressing can continue, increasing the flow cross-section of the sealing parts of the dosing port and the dosing device to achieve faster drug dispensing. When the liquid level reaches the sealing structure of the dosing port, gas-liquid exchange stops, and the drug no longer enters the storage body. When the unlocking block 502 is pressed, the limit pin 501 moves down along the feature groove 503A. At this time, when the dosing device 3 is pulled out, the internal seal 305 and the push rod assembly 506 of the dosing device successively complete the reset of the sealing structure of the dosing device 3 and the dosing port, finally achieving safe separation of the dosing device from the dosing port.

[0032] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made in accordance with the features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. An inhalation anesthetic agent doser comprising a doser comprising a bottle gasket, a spring holder, a spring, a spring seat, a doser inner gasket, a slide rod, a doser body, an O-ring, a doser cap gasket, and a doser cap; the spring seat and the slide rod are combined to form a combination one, the doser inner gasket is fixed at the joint of the spring seat and the slide rod, the spring is placed on the spring seat, the spring seat core rod passes through the center hole of the spring holder, the combination one is inserted into the center hole of the doser body from the top, and the spring holder and the doser body are fastened and connected at the contact surface; the combination two formed by the spring seat, the doser inner gasket, and the slide rod can move upward along the central axis by pressing, and can be automatically reset under the action of the spring and complete the isolation and sealing of the bottle from the outside; the doser cap gasket is fixed at the bottom of the doser cap, the combination is connected with the lower part of the doser body through the central thread, the doser cap gasket is extruded and sealed with the lower lip part of the doser body, and the secondary isolation and sealing of the anesthetic agent in the bottle from the outside is completed; the doser body has unique code features of anesthetic agents arranged in a polygonal or special shape.

2. A medicator for inhalation anesthetics according to claim 1, characterized in that: the slide rod has a plurality of protrusions around the cylinder, a hole in the center, a top boss structure, and a firm fixed combination with the spring seat.

3. The inhalation anesthetic vaporizer of claim 1, wherein: the spring holder and the doser body can be fused into an integrally formed structure by ultrasonic welding.

4. The inhalation anesthetic vaporizer of claim 1 wherein: the spring holder has a guide hole in the center and a four-prong support structure.

5. The inhalation anesthetic vaporizer of claim 1 wherein: the O-ring is placed in the sealing groove feature D of the doser body to realize mutual sealing of the doser and the matching dosing port.

6. The inhalation anesthetic vaporizer of claim 1 wherein: the neck boss feature of the doser body is provided with a hexagon, pentagon, quadrilateral, or special shape as the unique identification feature of each anesthetic agent.

7. The neck boss feature of the doser body according to claim 1 and 6 is a hexagon, pentagon, quadrilateral, or special shape with equal inscribed circles.

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