An infusion pump
By setting injection and output ports in the infusion pump, the problem that drug injection and infusion can only be performed at different times in existing infusion devices is solved, and drug injection and infusion can be performed simultaneously, which facilitates the addition of drugs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI FORNIA MEDICAL EQUIP CO LTD
- Filing Date
- 2024-12-31
- Publication Date
- 2026-07-07
AI Technical Summary
In existing infusion devices, drug filling and infusion can only be performed at one time through a single port, which is inconvenient for adding drugs.
An infusion pump was designed, comprising a housing, a guide sleeve assembly, an elastic reservoir, and a push rod. It is equipped with an injection port and an output port, allowing simultaneous injection and infusion of the drug solution. The drug solution is injected and output through the injection port and output port on the top cover of the guide sleeve, respectively.
It enables simultaneous injection and infusion of medication, facilitating the addition of additional drugs and making it more convenient to use.
Smart Images
Figure CN224462058U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to an infusion pump. Background Technology
[0002] Infusion devices are among the most common and frequently used medical devices in clinical practice. Patent document CN 211461553 U discloses an infusion device comprising a shell, a shell cover, an elastic reservoir, a guide sleeve, a push rod, a hanging ring, tubing, and a cover plate. The shell has an internal receiving cavity with an opening at its lower end. The shell cover is detachably mounted at the opening of the shell. The shell cover has an opening. The guide sleeve body is disposed within the receiving cavity, and a guide nozzle is provided at its lower end, fixedly installed at the opening of the shell cover. One end of the tubing is connected to the lower end of the guide sleeve at the opening. The push rod body is movably disposed within the guide sleeve and has a clearance fit with the inner wall of the guide sleeve, with its upper end extending beyond the upper end of the guide sleeve. The elastic reservoir is sleeved over the guide sleeve body and the push rod body. The upper end of the elastic reservoir is fixedly and sealed to the upper end of the push rod, and the lower end of the elastic reservoir is fixedly and sealed to the lower part of the guide sleeve.
[0003] The working principle of the above-mentioned infusion device is as follows:
[0004] Drug filling at the manufacturer or medical institution end: A pressured medication is injected into the elastic reservoir via an external infusion device. The pressured medication first travels through tubing to the infusion nozzle of the guide sleeve, then through the nozzle into the guide sleeve and finally into the elastic reservoir. The pressured liquid inflates the reservoir, causing a push rod to move upward relative to the guide sleeve. Once the reservoir has held a predetermined volume of medication, filling stops and the tubing is blocked or closed, leaving the medication within the infusion device. Drug infusion at the patient end: The infusion device containing the medication is used, and the tubing is connected to the patient for infusion.
[0005] The drawback of the aforementioned prior art is that drug filling and drug infusion can only be carried out one at a time through a single port, which is inconvenient for adding drugs. Utility Model Content
[0006] The purpose of this utility model is to provide an infusion pump structure to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution:
[0007] An infusion pump includes a housing, a guide sleeve assembly, an elastic reservoir, and a push rod. The housing is an open container. The guide sleeve assembly comprises a guide sleeve cylindrical portion and a guide sleeve top cover portion. The top cover portion is located at the opening of the housing, and the guide sleeve cylindrical portion is placed inside the housing. The top cover portion has an injection hole and an output hole, both communicating with the inner cavity of the guide sleeve cylindrical portion. The push rod body is movably disposed within the guide sleeve cylindrical portion and has a clearance fit with the inner wall of the guide sleeve cylindrical portion. The lower end of the push rod extends beyond the lower end of the guide sleeve cylindrical portion. The elastic reservoir is sleeved on the outside of the guide sleeve cylindrical portion. The lower end of the elastic reservoir is fixedly and sealed to the lower end of the push rod, and the upper end of the elastic reservoir is fixedly and sealed to the upper outer periphery of the guide sleeve cylindrical portion.
[0008] As a preferred technical solution, the infusion pump further includes a guide sleeve cover disposed above the top cover of the guide sleeve. The guide sleeve cover is provided with an injection fitting hole and an output fitting hole, wherein the injection fitting hole is aligned and connected with the injection hole, and the output fitting hole is aligned and connected with the output hole.
[0009] As a preferred technical solution, the infusion pump further includes a fixed cover, which has a central clearance hole, an edge pressing part, and a peripheral assembly part. The fixed cover is connected to the opening of the outer shell through the peripheral assembly part, and the guide sleeve cover and the guide sleeve top cover are pressed against the opening of the outer shell through the edge pressing part. The central clearance hole is for clearance of the injection fitting hole and the output fitting hole.
[0010] As a preferred technical solution, a filter membrane is provided above the output hole, and a protrusion is provided at the bottom of the guide sleeve cover to press the filter membrane tightly.
[0011] As a preferred technical solution, the upper end of the elastic reservoir is fastened to the upper outer periphery of the guide sleeve body by a fixing sleeve, and the lower end of the elastic reservoir is fastened to the lower outer periphery of the push rod by a rubber ring.
[0012] As a preferred technical solution, the infusion pump further includes a one-way valve, which is disposed in the injection hole in a manner that leads to the inner cavity of the guide sleeve body.
[0013] As a preferred technical solution, the infusion pump also includes a protective cap, the bottom of which is fixed with a rubber stopper for insertion into the injection port.
[0014] As a preferred technical solution, the infusion pump also includes an injection needle for inserting into the injection fitting hole during drug injection.
[0015] Compared with the prior art, the beneficial effects of this utility model are: since the infusion pump provided in this embodiment is provided with both an injection port and an output port, the injection and infusion do not interfere with each other and can be carried out simultaneously, which facilitates the addition of drugs and makes it more convenient to use. Attached Figure Description
[0016] Figure 1 A partial cross-sectional view of the infusion pump provided in an embodiment of this utility model.
[0017] Figure 2 An exploded view of the guide sleeve assembly and guide sleeve cover in the infusion pump provided in this embodiment of the utility model.
[0018] Figure 3 A cross-sectional view showing the assembly and cooperation of the guide sleeve assembly, guide sleeve cover, fixed cover, elastic reservoir and push rod in the infusion pump provided in this embodiment of the utility model.
[0019] Figure 4 The bottom view of the guide sleeve cover in the infusion pump provided in this embodiment of the utility model.
[0020] Figure 5 for Figure 4 Cross-sectional view of BB. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. For ease of explanation, the terms "up," "down," "left," "right," "front," and "rear" may be defined in this application to clearly describe the structure of the device, and are not intended to limit the actual position of the device during production, use, or sale. The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:
[0023] Please see Figure 1-5 This embodiment provides an infusion pump, including a housing 1, a guide sleeve assembly 2, a guide sleeve cover 3, a fixing cover 4, an elastic reservoir 5, and a push rod 6. The housing 1 is a container with an opening; the guide sleeve assembly 2 includes a guide sleeve cylindrical part 21 and a guide sleeve top cover part 22, the guide sleeve top cover part 22 is disposed at the opening of the housing 1, and the guide sleeve cylindrical part 21 is placed inside the housing 1. The guide sleeve top cover part 22 of the guide sleeve assembly 2 has an injection hole 221 and an output hole 222, both of which communicate with the inner cavity of the guide sleeve cylindrical part 21.
[0024] The injection port 221 is used to connect directly or indirectly to the drug supply device to inject drug into the guide sleeve assembly 2; the output port 222 is used to connect directly or indirectly to the infusion line 7 to output the drug in the guide sleeve assembly 2 to the patient.
[0025] The guide sleeve cover 3 is provided with an injection fitting hole 301 and an output fitting hole 302; the guide sleeve cover 3 is located above the top cover part 22 of the guide sleeve, and the injection fitting hole 301 is aligned and connected with the injection hole 221, and the output fitting hole 302 is aligned and connected with the output hole 222.
[0026] The fixed cover 4 has a central clearance hole 41, an edge pressing part 42, and an outer assembly part 43. The fixed cover 4 is screwed or snapped to the outer periphery of the opening of the outer shell 1 through the outer assembly part 43, and the guide sleeve cover 3 and the guide sleeve top cover part 22 are pressed to the opening of the outer shell 1 through the edge pressing part 42. At the same time, the central clearance hole 41 provides clearance for the liquid injection mating hole 301 and the output mating hole 302.
[0027] The push rod 6 is movably disposed within the guide sleeve body 21 and is clearance-fitted with the inner wall of the guide sleeve body 21. The lower end of the push rod 6 extends beyond the lower end of the guide sleeve body 21. The elastic reservoir 5 is sleeved on the outside of the guide sleeve body 21. The lower end of the elastic reservoir 5 is fixed and sealed to the lower end of the push rod 6, and the upper end of the elastic reservoir 5 is fixed and sealed to the upper outer periphery of the guide sleeve body 21. Specifically, the upper end of the elastic reservoir 5 is fastened to the upper outer periphery of the guide sleeve body 21 by a fixing sleeve 51, and the lower end of the elastic reservoir 5 is fastened to the lower outer periphery of the push rod 6 by a rubber ring.
[0028] As described above, the push rod 6 and the inner wall of the guide sleeve body 21 are fitted with a clearance, so that the liquid medicine in the guide sleeve assembly 2 can enter the elastic reservoir 5, and the liquid medicine in the elastic reservoir 5 can also enter the guide sleeve assembly 2.
[0029] The working principle of the above-mentioned infusion pump is as follows:
[0030] The manufacturer or medical institution performs drug filling: a certain pressure of drug solution is injected into the elastic reservoir 5 through an external injection device. The drug solution under certain pressure first enters the guide sleeve assembly 2 through the injection mating hole 301 and the injection hole 221, and then enters the elastic reservoir 5. The liquid under certain pressure expands the elastic reservoir 5. At the same time as it expands, the push rod 6 moves downward relative to the guide sleeve assembly 2. After the elastic reservoir 5 has stored a predetermined volume of drug solution, the injection stops.
[0031] Medication infusion at the patient end: Take the infusion pump containing the medication and connect the infusion line 7 to the patient. Due to the elastic recovery force of the elastic reservoir 5, the medication in the elastic reservoir 5 passes through the guide sleeve assembly 2, and then through the output hole 222 and the output mating hole 302 before being output, so that the medication can be infused to the patient.
[0032] It should be noted that, since the infusion pump provided in this embodiment is provided with both an injection port 221 and an output port 222, the injection and infusion do not interfere with each other and can be carried out simultaneously, making it more convenient to use.
[0033] In a preferred embodiment, the infusion pump provided in this embodiment also includes a one-way valve 12, which is disposed in the injection hole 221 in a manner that allows the fluid to pass through the inner cavity of the guide sleeve body 21, so as to prevent the drug solution from being discharged from the injection hole 221 during the infusion process for the patient.
[0034] In a preferred embodiment, the infusion pump provided in this embodiment also includes a protective cap 13, with a rubber stopper fixed to the bottom of the protective cap 13. The rubber stopper is inserted into the injection fitting hole 301, and the protective cap 13 can seal the injection fitting hole 301 to prevent external impurities from contaminating the injection fitting hole 301.
[0035] In a preferred embodiment, the system also includes an injection needle 14, which is used to insert into the injection fitting hole 301 during drug injection to add drug to the infusion pump.
[0036] In a preferred embodiment, a filter membrane 11 is provided above the output hole 222, and a protrusion 15 is provided at the bottom of the guide sleeve cover 3. The protrusion 15 can play an anti-slip and pressing role on the filter membrane 11, making the position of the filter membrane 11 more stable.
[0037] In a preferred embodiment, the outer side of the top of the outer casing 1 is provided with an external thread, and the inner side of the fixing cover 4 is provided with an internal thread. The fixing cover 4 is threadedly connected to the outer casing 1, which facilitates the disassembly of the fixing cover 4 and thus facilitates the cleaning of the infusion pump.
[0038] In a preferred embodiment, the top of the fixed cover 4 is provided with a flange 46, which facilitates the rotation of the fixed cover 4.
[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An infusion pump, comprising a housing, a guide sleeve assembly, an elastic reservoir, and a push rod, wherein the housing is a container with an opening; characterized in that: The guide sleeve assembly includes a guide sleeve body and a guide sleeve top cover. The guide sleeve top cover is located at the opening of the outer shell, and the guide sleeve body is placed inside the outer shell. The guide sleeve top cover has an injection hole and an output hole that are both connected to the inner cavity of the guide sleeve body. The push rod body is movably disposed inside the guide sleeve body and is clearance-fitted with the inner wall of the guide sleeve body. The lower end of the push rod extends outside the lower end of the guide sleeve body. The elastic reservoir body is sleeved outside the guide sleeve body. The lower end of the elastic reservoir is fixed and sealed to the lower end of the push rod, and the upper end of the elastic reservoir is fixed and sealed to the upper outer periphery of the guide sleeve body.
2. The infusion pump according to claim 1, characterized in that, The infusion pump also includes a guide sleeve cover disposed above the top cover of the guide sleeve. The guide sleeve cover is provided with an injection fitting hole and an output fitting hole, wherein the injection fitting hole is aligned and connected with the injection hole, and the output fitting hole is aligned and connected with the output hole.
3. The infusion pump according to claim 2, characterized in that, The infusion pump also includes a fixed cover, which has a central clearance hole, an edge pressing part, and a peripheral assembly part. The fixed cover is connected to the opening of the outer shell through the peripheral assembly part, and the guide sleeve cover and the guide sleeve top cover are pressed against the opening of the outer shell through the edge pressing part. The central clearance hole is for clearance of the injection fitting hole and the output fitting hole.
4. The infusion pump according to claim 3, characterized in that, A filter membrane is provided above the output port, and a protrusion is provided at the bottom of the guide sleeve cover to press the filter membrane tightly.
5. The infusion pump according to claim 1, characterized in that, The upper end of the elastic reservoir is fastened to the upper outer periphery of the guide sleeve body by a fixing sleeve, and the lower end of the elastic reservoir is fastened to the lower outer periphery of the push rod by a rubber ring.
6. The infusion pump according to claim 1, characterized in that, The infusion pump also includes a one-way valve, which is disposed in the injection hole in a manner that leads to the inner cavity of the guide sleeve body.
7. The infusion pump according to claim 1, characterized in that, The infusion pump also includes a protective cap, the bottom of which is fixed with a rubber stopper for insertion into the injection port.
8. The infusion pump according to claim 2, characterized in that, The infusion pump also includes an injection needle for inserting into the injection fitting hole during drug filling.