Medical device based on linkage of manual injection and automatic suction and linkage method

Abstract

The medical device comprises a liquid storage tank, an injector assembly and a double-one-way valve system, the injector assembly comprises an injector body and an elastic body, a piston is located in a syringe, one end of a piston rod is connected with the piston, the other end of the piston rod is connected with an end baffle, the elastic body is arranged on the piston rod in a sleeving mode, and the elastic body is located in the syringe body. The two ends of the elastic body abut against the syringe and the end baffle respectively. The double-one-way valve system comprises a first one-way valve, a second one-way valve and a three-way pipeline, three ports of the three-way pipeline are connected with a discharge port of the first one-way valve, an inlet port of the second one-way valve and a suction and discharge port of the syringe respectively, and the inlet port of the first one-way valve is communicated with the liquid storage tank through a pipeline; compared with full-manual equipment, automatic liquid supplementing can be achieved, and more than 50% of operation steps are reduced. Compared with full-automatic equipment, the flexibility of manual pushing injection is reserved, and meanwhile automatic liquid supplementing can be achieved through a simple mechanical structure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a medical device and a linkage method based on the linkage of manual injection and automatic aspiration. Background Art

[0002] In clinical treatment and nursing, many treatment and nursing tasks highly rely on specific medical devices to complete the aspiration and injection of liquids. Taking laryngeal anesthesia spray and vaginal irrigation as examples, they have closely connected aspiration and injection links in the operation process. Traditional fully manual devices, such as common syringes, rely on medical staff to continuously manually push and pull the piston. During laryngeal anesthesia spray operation, after the doctor finishes spraying, they need to manually and slowly draw back the piston to aspirate new anesthetic liquid. The whole process not only consumes a lot of energy but also cannot achieve automatic liquid replenishment after releasing the hand, resulting in extremely low operation efficiency. In the case of vaginal irrigation, nursing staff also need to repeatedly operate manually, making it difficult to ensure the high efficiency and coherence of the irrigation process. For patients who need frequent irrigation treatment, it undoubtedly increases the nursing burden.

[0003] On the contrary, fully automatic devices, such as common electric aspiration pumps and the aspiration device provided by the utility model patent with the publication number CN218356821U, although they improve the aspiration efficiency to a certain extent, have many drawbacks. Such devices rely on electric drive, which requires a stable power supply in the usage scenario. Otherwise, the device will not operate properly, and it is not flexible and convenient to use. At the same time, their internal structure is complex, including many components such as motors and complex circuit control boards. This not only greatly increases the device cost, making it difficult for grass-roots medical institutions to afford, but also the complex structure increases the device failure rate and the maintenance cost is high. Particularly crucial is that in scenarios such as laryngeal anesthesia spray and vaginal irrigation that require precise small-dose operations, fully automatic devices are difficult to meet the requirements.

[0004] In addition, fully automatic devices are usually more suitable for continuous operations. If applied to intermittent operation scenarios such as laryngeal anesthesia spray and vaginal irrigation, continuous flushing or spraying is likely to cause excessive pressure and irritation to local tissues. For example, when applied to the larynx, it may cause discomfort and coughing of the laryngeal mucosa, and even cause mucosal damage; in vaginal irrigation, excessive irrigation will disrupt the normal acid-base balance and microecological environment in the vagina, increase the risk of infection, and may also damage the vaginal mucosa.

[0005] Therefore, developing a new medical device and a linkage method that can achieve the linkage of manual injection and automatic aspiration for liquid replenishment is of great practical significance for improving the quality of clinical treatment and nursing and meeting the actual medical needs. Summary of the Invention

[0006] The object of the present invention is to provide a medical device and a linkage method based on the linkage of manual injection and automatic aspiration, aiming to improve the problem that the existing fully manual devices and fully automatic devices cannot simultaneously meet the requirements of manual precise injection and automatic aspiration and replenishment of liquid.

[0007] The present invention is implemented as follows: According to the second aspect of the present invention, there is provided a medical device based on the linkage of manual injection and automatic aspiration, including a liquid storage tank, and further including: A syringe assembly, the syringe assembly includes a syringe body and an elastic body. The syringe body includes a syringe barrel, a piston, a piston rod, and an end baffle. The piston is located in the syringe barrel. One end of the piston rod is connected to the piston, and the other end is connected to the end baffle. The elastic body is sleeved on the piston rod, and both ends of the elastic body are respectively abutted against the syringe barrel and the end baffle; A double one-way valve system, including a first one-way valve, a second one-way valve, and a three-way pipeline. The three ports of the three-way pipeline are respectively connected to the discharge port of the first one-way valve, the inlet of the second one-way valve, and the suction and discharge port of the syringe barrel, and the inlet of the first one-way valve is connected to the liquid storage tank through a pipeline.

[0008] Further, the elastic body uses a spring or an elastic rubber cylinder, and a fitting connection structure is provided at the discharge port of the second one-way valve.

[0009] Further, the end baffle includes an adjusting baffle. A threaded rod portion is provided at the end of the piston rod away from the piston. The adjusting baffle is provided with a threaded through hole adapted to the threaded rod portion. The adjusting baffle is installed on the threaded rod portion of the piston rod through its threaded through hole, and one end of the elastic body away from the syringe barrel abuts against the adjusting baffle.

[0010] Further, the end baffle further includes a hand push plate. A threaded sleeve is provided on the inner side of the hand push plate. The hand push plate is installed at the end of the threaded rod portion through the threaded sleeve.

[0011] Further, the adjusting baffle is in a disc shape, its diameter is larger than the outer diameter of the elastic body, and an anti-slip structure is provided on the cylindrical wall of the adjusting baffle.

[0012] Further, the liquid storage tank includes a tank body and a tank cover. A threaded interface is provided at the upper end of the tank body, and the tank cover is threadedly installed on the threaded interface at the upper end of the tank body; A liquid suction pipe is provided through the tank cover. One end of the liquid suction pipe is inserted into the tank body, and the other end is connected to the inlet of the first one-way valve.

[0013] Further, a respirator is provided on the tank cover, and the respirator is used to balance the air pressure inside and outside the liquid storage tank.

[0014] According to the second aspect of the present invention, the present invention provides a medical manual injection and automatic aspiration linkage method, using the above-mentioned medical device based on the linkage of manual injection and automatic aspiration, including: Manual injection stage: The operator applies pressure to drive the piston rod and the end baffle, compresses the elastomer, the first one-way valve closes, and the second one-way valve opens. The liquid in the syringe barrel is discharged through the discharge port of the second one-way valve. Automatic liquid replenishment stage: The operator releases the piston rod and the end baffle, the elastomer rebounds to drive the piston and the piston rod to reset, the second one-way valve closes, and the first one-way valve opens. The liquid in the liquid storage tank enters the syringe barrel through the first one-way valve to achieve automatic liquid replenishment.

[0015] Furthermore, the operating pressure in the manual injection stage is 0.5 - 5N, and the rebound speed of the elastomer in the automatic liquid replenishment stage is 10 - 50mm / s.

[0016] Furthermore, before operation, the required medical liquid is added to the liquid storage tank. The pre-tightening force of the elastomer is adjustable. According to the viscosity of the medical liquid, the pre-tightening force of the elastomer is adjusted; according to the specific use, a liquid outlet component is connected to the discharge port of the second one-way valve, and the liquid outlet component is an atomizing nozzle, a porous flushing catheter or a splash-proof biopsy spray nozzle.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: Compared with the fully manual device that requires full manual control of injection and aspiration, the present invention can achieve automatic liquid replenishment and reduces more than 50% of the operation steps. Compared with the fully automatic device that is inconvenient to use and not easy to control finely, the present invention retains the flexibility of manual injection and realizes automatic liquid replenishment through a simple mechanical structure. Description of the Drawings

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a front view of the present invention; Figure 3 is a front view of the syringe assembly of the present invention; Figure 4 is a three-dimensional structural schematic diagram of the syringe assembly of the present invention when the hand push plate is removed; Figure 5 is a schematic diagram of the liquid flow direction in the flushing or spraying state when the push plate is pushed in the present invention; Figure 6 is a schematic diagram of the liquid flow direction in the automatic liquid replenishment state when the push plate is pulled in the present invention.

[0019] In the figure: 1. Liquid storage tank; 2. Elastomer; 3. Syringe barrel; 4. Piston rod; 41. Threaded rod portion; 5. End baffle; 51. Adjusting baffle; 52. Push plate; 6. First one-way valve; 7. Second one-way valve; 8. Three-way pipeline; 9. Respirator. Detailed implementation mode

[0020] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0021] The following is a further description in conjunction with the drawings and specific embodiments: Embodiment 1 This embodiment provides a medical device based on the linkage of manual injection and automatic aspiration, as Figures 1-6 shown, including a liquid storage tank 1, a syringe assembly and a double one-way valve system. The liquid storage tank 1 is used to store medical liquids, such as anesthetic liquids, flushing liquids, etc. The liquid storage tank 1 includes a tank body and a tank cover. The upper end of the tank body is provided with a threaded interface, and the tank cover is threadedly installed on the threaded interface at the upper end of the tank body. The syringe assembly includes a syringe body and an elastomer 2. The elastomer 2 uses a spring or an elastic rubber cylinder. The syringe body includes a syringe barrel 3, a piston, a piston rod 4, and an end baffle 5. The piston is located in the syringe barrel 3. A plurality of capacity value marking scales are preset on the outer wall of the syringe barrel 3. When the front end of the piston is located at the corresponding capacity value marking scale position, it is the capacity value of the liquid in the syringe barrel 3. One end of the piston rod 4 is connected to the piston, and the other end is connected to the end baffle 5. The elastomer 2 is sleeved on the piston rod 4, and both ends of the elastomer 2 are respectively abutted against the syringe barrel 3 and the end baffle 5.

[0022] As Figures 1-4As shown, the end baffle 5 includes an adjusting baffle 51 and a hand push plate 52. A threaded rod portion 41 is provided at one end of the piston rod 4 away from the piston. The adjusting baffle 51 is provided with a threaded through hole adapted to the threaded rod portion 41. The adjusting baffle 51 is mounted on the threaded rod portion 41 of the piston rod 4 through its threaded through hole. The adjusting baffle 51 is disc-shaped, and its diameter is larger than the outer diameter of the elastic body 2. One end of the elastic body 2 away from the syringe barrel 3 abuts against the adjusting baffle 51. By rotating the adjusting baffle 51, the pre-tightening force of the elastic body 2 can be adjusted to adapt to medical liquids of different viscosities. At the same time, the volume of liquid within a certain range can also be adjusted by adjusting the pre-tightening force of the elastic body 2. An anti-slip structure is provided on the cylindrical wall of the adjusting baffle 51 to facilitate rotating the adjusting baffle 51 to adjust the pre-tightening force of the elastic body 2. A threaded sleeve is provided inside the hand push plate 52. The hand push plate 52 is mounted on the end of the threaded rod portion 41 through the threaded sleeve. The hand push plate 52 enables the operator to easily operate the syringe assembly for manual injection.

[0023] As Figure 1 and Figure 2 shown, the double one-way valve system includes a first one-way valve 6, a second one-way valve 7, and a three-way pipeline 8. The three-way pipeline 8 can be a three-way joint. The three ports of the three-way pipeline 8 are respectively connected to the discharge port of the first one-way valve 6, the inlet of the second one-way valve 7, and the suction and discharge port of the syringe barrel 3. The allowed conduction directions of the first one-way valve 6 and the second one-way valve 7 are both from their inlets to their discharge ports. A liquid suction pipe is penetrated through the lid of the liquid storage tank 1. One end of the liquid suction pipe is inserted into the tank body, and the other end is connected to the inlet of the first one-way valve 6, so that the inlet of the first one-way valve 6 is communicated with the inside of the liquid storage tank 1. A fitting connection structure is provided at the discharge port of the second one-way valve 7. The fitting connection structure can be the discharge port structure of the second one-way valve 7 itself, which can be directly used for plugging in liquid outlet components suitable for different treatment purposes, such as an atomizing nozzle, a multi-hole flushing catheter, or a splash-proof biopsy spray tube. The fitting connection structure can also be an installation interface structural member installed at the discharge port of the second one-way valve 7 and having a socket, and the socket is communicated with the discharge port of the second one-way valve 7.

[0024] As Figure 1 or Figure 2 shown, a breather 9 is provided on the lid of the liquid storage tank 1. The breather 9 is used to balance the air pressure inside and outside the liquid storage tank 1. When the medical liquid in the liquid storage tank 1 is aspirated, the air pressure in the tank will change. The breather 9 allows appropriate external air to enter the tank to keep the air pressure in the tank stable.

[0025] Embodiment 2 This embodiment provides a method for the linkage of medical manual injection and automatic aspiration. Using the medical device based on the linkage of manual injection and automatic aspiration provided in Embodiment 1, it includes: Preparation stage: According to the needs of treatment or care, add the required medical liquid into the liquid storage tank 1; adjust the elastomer 2 to an appropriate pre-tightening force according to the viscosity of the medical liquid; connect an appropriate liquid outlet component to the discharge port of the second one-way valve 7 according to the specific use.

[0026] Manual injection stage: The operator applies pressure to drive the piston rod 4 and the end baffle 5, compresses the elastomer 2, the first one-way valve 6 closes, the second one-way valve 7 opens, and the liquid in the syringe barrel 3 is discharged through the discharge port of the second one-way valve 7, and then is discharged by the liquid outlet component installed at the discharge port of the second one-way valve 7, spraying the medical liquid on the treatment part or care part of the patient.

[0027] Automatic liquid replenishment stage: The operator releases the piston rod 4 and the end baffle 5, the elastomer 2 rebounds to drive the piston and the piston rod 4 to reset, the second one-way valve 7 closes, the first one-way valve 6 opens, and the liquid in the liquid storage tank 1 enters the syringe barrel 3 through the first one-way valve 6 to achieve automatic liquid replenishment.

[0028] The operating pressure in the manual injection stage is controlled at 0.5 - 5 N, and the rebound speed of the elastomer 2 in the automatic liquid replenishment stage is controlled at 10 - 50 mm / s, which can be achieved by reasonably selecting the syringe and the elastomer 2 and reasonably adjusting the pre-tightening force of the elastomer 2.

[0029] Example 3 This example provides a laryngeal anesthesia spraying method, using the medical device based on the linkage of manual injection and automatic suction provided in Example 1, including the following steps: Preparation stage: Add anesthetic liquid into the liquid storage tank 1, adjust the elastomer 2 to an appropriate pre-tightening force, and connect an atomizing nozzle to the discharge port of the second one-way valve 7.

[0030] Manual injection stage: Align the atomizing nozzle with the patient's larynx, the operator applies a pressure of about 2 N to drive the piston rod 4 and the end baffle 5, compresses the elastomer 2, the first one-way valve 6 closes, the second one-way valve 7 opens, and the liquid in the syringe barrel 3 is discharged through the discharge port of the second one-way valve 7, and then is sprayed from the atomizing nozzle to the patient's larynx for laryngeal anesthesia.

[0031] Automatic liquid replenishment stage: The operator releases the piston rod 4 and the end baffle 5, the elastomer 2 rebounds to drive the piston and the piston rod 4 to reset, the rebound speed is 30 mm / s, the second one-way valve 7 closes, the first one-way valve 6 opens, and the anesthetic liquid in the liquid storage tank 1 enters the syringe barrel 3 through the first one-way valve 6 to achieve automatic replenishment of the anesthetic liquid. The automatic replenishment of the anesthetic liquid can adjust the volume value of the extracted liquid according to the pre-tightening force of the elastomer 2. The cycle time < 3 seconds.

[0032] Example 4 This embodiment provides a vaginal irrigation method, which uses the medical device based on the linkage of manual injection and automatic aspiration provided in Embodiment 1, and includes the following steps: Preparation stage: Add vaginal irrigation fluid into the liquid storage tank 1, adjust the elastomer 2 to an appropriate pre-tightening force, and connect a porous irrigation catheter to the discharge port of the second one-way valve 7.

[0033] Manual injection stage: Insert the porous irrigation catheter into the patient's vagina. The operator applies a pressure of about 5 N to drive the piston rod 4 and the end baffle 5, compress the elastomer 2, the first one-way valve 6 closes, and the second one-way valve 7 opens. The liquid in the syringe barrel 3 is discharged through the discharge port of the second one-way valve 7, and then the irrigation fluid is sprayed into the patient's vagina through the porous irrigation catheter for vaginal irrigation.

[0034] Automatic fluid replenishment stage: The operator releases the piston rod 4 and the end baffle 5. The elastomer 2 rebounds to drive the piston and the piston rod 4 to reset, with a rebound speed of 50 mm / s. The second one-way valve 7 closes, and the first one-way valve 6 opens. The vaginal irrigation fluid in the liquid storage tank 1 enters the syringe barrel 3 through the first one-way valve 6 to achieve automatic replenishment of the vaginal irrigation fluid. The cycle time is <1 second.

[0035] In summary, compared with the fully manual device that requires full manual control of injection and aspiration, the present invention can achieve automatic fluid replenishment and reduce more than 50% of the operation steps. Compared with the fully automatic device that is inconvenient to use and not easy to control precisely, the present invention retains the flexibility of manual injection and can achieve automatic fluid replenishment through a simple mechanical structure.

[0036] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A medical device based on the linkage of manual injection and automatic aspiration, including a liquid storage tank (1), characterized in that, Further included are: A syringe assembly, which includes a syringe body and an elastomer (2). The syringe body includes a syringe barrel (3), a piston, a piston rod (4), and an end baffle (5). The piston is located in the syringe barrel (3). One end of the piston rod (4) is connected to the piston, and the other end is connected to the end baffle (5). The elastomer (2) is sleeved on the piston rod (4), and both ends of the elastomer (2) are respectively abutted against the syringe barrel (3) and the end baffle (5); A double one-way valve system, including a first one-way valve (6), a second one-way valve (7), and a three-way pipeline (8). The three ports of the three-way pipeline (8) are respectively connected to the discharge port of the first one-way valve (6), the inlet of the second one-way valve (7), and the suction and discharge port of the syringe barrel (3), and the inlet of the first one-way valve (6) is connected to the liquid storage tank (1) through a pipeline.

2. The medical device based on the linkage of manual injection and automatic aspiration according to claim 1, characterized in that, The elastomer (2) uses a spring or an elastic rubber cylinder, and a fitting connection structure is provided at the discharge port of the second one-way valve (7).

3. The medical device based on the linkage of manual injection and automatic aspiration according to claim 1, wherein, The end baffle (5) includes an adjusting baffle (51). A threaded rod portion (41) is provided at one end of the piston rod (4) away from the piston. The adjusting baffle (51) is provided with a threaded through hole adapted to the threaded rod portion (41). The adjusting baffle (51) is installed on the threaded rod portion (41) of the piston rod (4) through its threaded through hole, and one end of the elastomer (2) away from the syringe barrel (3) abuts against the adjusting baffle (51).

4. A medical device based on the linkage of manual injection and automatic aspiration according to claim 3, wherein, The end baffle (5) further includes a hand push plate (52). A threaded sleeve is provided inside the hand push plate (52). The hand push plate (52) is installed at the end of the threaded rod portion (41) through the threaded sleeve.

5. A medical device based on the linkage of manual injection and automatic aspiration according to claim 3, characterized in that, The adjusting baffle (51) is in a disc shape, its diameter is larger than the outer diameter of the elastomer (2), and an anti-slip structure is provided on the cylindrical wall of the adjusting baffle (51).

6. A medical device based on the linkage of manual injection and automatic aspiration according to claim 1, characterized in that, The liquid storage tank (1) includes a tank body and a tank cover. A threaded interface is provided at the upper end of the tank body, and the tank cover is threadedly installed on the threaded interface at the upper end of the tank body; A liquid suction pipe penetrates through the tank cover. One end of the liquid suction pipe is inserted into the tank body, and the other end is connected to the inlet of the first one-way valve (6).

7. A medical device based on the linkage of manual injection and automatic aspiration according to claim 6, characterized in that, A breather (9) is provided on the tank cover, and the breather (9) is used to balance the air pressure inside and outside the liquid storage tank (1).

8. A medical manual injection and automatic aspiration linkage method, which uses the medical device based on manual injection and automatic aspiration linkage as described in any one of claims 1-7, and is characterized in that, Including: Manual injection stage: The operator applies pressure to drive the piston rod (4) and the end baffle (5), compressing the elastomer (2). The first one-way valve (6) closes, and the second one-way valve (7) opens. The liquid in the syringe barrel (3) is discharged through the discharge port of the second one-way valve (7); Automatic liquid replenishment stage: The operator releases the piston rod (4) and the end baffle (5). The elastomer (2) rebounds to drive the piston and the piston rod (4) to reset. The second one-way valve (7) closes, and the first one-way valve (6) opens. The liquid in the liquid storage tank (1) enters the syringe barrel (3) through the first one-way valve (6) to achieve automatic liquid replenishment.

9. A medical manual injection and automatic aspiration linkage method according to claim 8, characterized in that, The operating pressure in the manual injection stage is 0.5 - 5N, and the rebound speed of the elastomer (2) in the automatic liquid replenishment stage is 10 - 50mm / s.

10. A medical manual injection and automatic aspiration linkage method according to claim 8, characterized in that, Before operation, add the medical liquid to be used into the liquid storage tank (1). The pre-tightening force of the elastomer (2) is adjustable. Adjust the pre-tightening force of the elastomer (2) according to the viscosity of the medical liquid. According to the specific use, connect a liquid outlet component to the discharge port of the second one-way valve (7), and the liquid outlet component is an atomizing nozzle, a porous flushing catheter or a splash-proof biopsy nozzle.

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