CN213191217U - Leak-proof precise configurator - Google Patents

Abstract

The utility model provides a leakage-proof precise configurator, which comprises a needle cylinder and a needle head connected with the needle cylinder, wherein a piston is arranged in the needle cylinder, the piston is connected with a piston rod, the piston and the bottom of the needle cylinder form a piston cavity, and the interior of the needle head can be communicated with the piston cavity; the syringe also comprises a stop valve and a liquid inlet one-way valve which are arranged between the needle head and the syringe, and an air bag communicated with the piston cavity, and the side wall of the syringe is provided with metering scales. The utility model discloses a dispenser when demarcation suction liquid medicine dosage, when removing the piston and making piston chamber volume grow, the volume of gasbag diminishes, forms the negative pressure in the gasbag, and during the syringe was inhaled with unnecessary liquid medicine in the medicine bottle to the negative pressure, the volume of liquid medicine was equal with the volume of piston chamber increase in the suction syringe, guaranteed the accurate unnecessary liquid medicine of extraction as required. And the liquid inlet one-way valve is arranged, so that the liquid medicine can only enter but not exit, and the liquid medicine in the medicine dispenser is completely free from the influence of external force and leaks out from the needle head during the treatment and transportation of medical waste, thereby reducing the injury to personnel and the pollution to the environment.

Description

Leak-proof precise configurator

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to prevent leaking accurate configurator, in particular to chemotherapy medicine configurator.

Background

In tumor therapy, chemotherapy is one of the important therapeutic approaches for tumor patients. Oncological nurses are often exposed to large amounts of chemotherapeutic agents throughout the course of chemotherapy, often at risk of occupational exposure, and may also have adverse environmental effects, particularly during the course of chemotherapeutic agent deployment.

When a nurse sucks and sucks liquid in the medicine bottle by using the disposable empty needle, a trace amount of medicine overflows, aerosol containing toxic particles can be formed, air pollution is caused, and the medicine is sucked into the body of a medical worker through the skin or the respiratory tract. Experiments prove that accumulation phenomena are easy to occur to generate toxic reactions when the chemotherapy drugs are contacted for a long time, such as injuries of tissues and organs of hematopoietic systems, digestive tract epithelial cells and the like in different degrees, and long-term adverse reactions such as carcinogenesis, teratogenesis, mutagenesis and the like are generated at the same time.

In the configuration chemotherapy medicine in-process, when patient's quantity and chemotherapy medicine specification mismatch, need the nurse to take out unnecessary liquid medicine, we mostly take disposable empty needle suction when sucking unnecessary liquid medicine, stay unnecessary liquid medicine in the empty needle, then concentrate the processing.

The adoption of a disposable empty needle to extract redundant liquid medicine mainly has the following problems: 1) when the liquid medicine is sucked, the disposable empty needle is frequently used due to too much or too little suction caused by human factors at one time, so that the sucked dose is not accurate; 2) In the transportation process, the piston of the empty needle can move due to uneven stress, so that the chemotherapy liquid medicine leaks, and great harm is brought to transportation personnel, treatment personnel and the environment. 3) When the disposable empty needle sucks liquid medicine, the piston is pulled to generate negative pressure to suck the liquid medicine into the injector, and the injector with the piston pulled open is an open container, so that the pollution chance is high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem who exists among the prior art, the utility model aims at providing a prevent leaking accurate configurator to solve the present inaccurate technical problem of unnecessary liquid medicine dosage of disposable empty needle suction of current.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the anti-leakage precise configurator comprises a needle cylinder and a needle head connected with the needle cylinder, wherein a piston is arranged in the needle cylinder, a piston rod is connected onto the piston, a piston cavity is formed by the piston and the bottom of the needle cylinder, and the interior of the needle head can be communicated with the piston cavity; the syringe also comprises a stop valve and a liquid inlet one-way valve which are arranged between the needle head and the syringe, and an air bag communicated with the piston cavity, and the side wall of the syringe is provided with metering scales.

In the technical scheme, the metering scales are used for metering, so that people can conveniently determine the dosage of the liquid medicine to be extracted. When the dosage of the liquid medicine is calibrated, the stop valve is closed, the piston cavity and the air bag are closed spaces, when the piston is moved to enable the volume of the piston cavity to be increased, the volume of the air bag is reduced, the reduced volume of the air bag is smaller than the increased volume of the piston cavity, negative pressure is formed in the air bag, redundant liquid medicine in the medicine bottle is sucked into the needle cylinder by the negative pressure, the amount of the liquid medicine in the suction needle cylinder is equal to the increased volume of the piston cavity, and the redundant liquid medicine is accurately sucked as required. And the liquid inlet one-way valve is arranged, so that the liquid medicine can only enter but not exit, and the liquid medicine in the medicine dispenser is completely free from the influence of external force and leaks out from the needle head during the treatment and transportation of medical waste, thereby reducing the injury to personnel and the pollution to the environment.

In a preferred embodiment of the present invention, the top of the syringe is closed, and the end of the piston rod remote from the piston passes through and is located outside the top of the syringe. Therefore, the piston is packaged in the needle cylinder, the piston is prevented from sliding out of the needle cylinder to cause liquid medicine leakage, and the safety is further improved.

In a preferred embodiment of the present invention, the piston rod is connected to the top of the syringe by a screw thread, the piston rod is connected to the piston by a rotation, and the piston is connected to the inner wall of the syringe by a sliding fit. The threaded connection can realize the self-locking of the piston rod, and after the metering scales are calibrated, the piston rod is not required to be kept still by people, so that the operation is more convenient.

In a preferred embodiment of the present invention, the piston rod is connected to the top of the syringe by a screw thread, the piston rod is fixedly connected to the piston, and the piston can rotate relative to the syringe.

In a preferred embodiment of the present invention, the air bag is fixedly connected to the side wall of the cylinder. The syringe and the air bag form a whole body, which is convenient for holding.

In another preferred embodiment of the present invention, the stop valve is located at the front end of the liquid inlet check valve, or the stop valve is located at the rear end of the liquid inlet check valve.

In another preferred embodiment of the present invention, the side wall of the syringe and the bottom of the piston chamber are connected to a conduit, and the conduit is connected to the air bag.

In another preferred embodiment of the present invention, a handle is fixedly connected to an end of the piston rod away from the piston. People can conveniently move the piston rod through the handle, and the operation is more convenient.

The beneficial effects of the above technical scheme are:

1) the medicine dispenser enables the whole medicine dispensing process to be completed under a relatively sealed condition, reduces the chance of direct contact between chemotherapy medicines and medical personnel, and improves the safety of medicine preparation.

2) The dosage of the disposable empty needle is not accurate due to human factors when the liquid medicine is sucked, and the dosage can be accurately set by the medicine dispenser without influencing the curative effect of a patient.

3) The medicine dispenser uses the check valve to control the liquid medicine to only flow in and out, and the liquid medicine pumped into the needle cylinder and the air bag is completely prevented from leaking out due to the influence of external force in the process of treating and transferring medical waste, thereby reducing the harm to personnel and the pollution to the environment.

4) The piston of the medicine dispenser is sealed in the needle cylinder, so that the piston is prevented from sliding out of the needle cylinder to cause liquid medicine leakage, and the safety is further improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an initial state of a leak-proof precision configurator according to a first embodiment of the present application.

Fig. 2 is a schematic structural diagram of a negative pressure state of the leak-proof precise configurator according to the first embodiment of the present application.

Fig. 3 is a schematic structural diagram of an initial state of the leak-proof precision configurator according to the second embodiment of the present application.

Reference numerals in the drawings of the specification include: syringe 10, piston chamber 101, piston 11, piston rod 12, handle 13, liquid inlet one-way valve 20, support angle 21, stop valve 30, needle 40, gasbag 50, pipeline 60.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

Example one

The embodiment provides a leakage-proof precise configurator, as shown in fig. 1 and fig. 2, in a preferred embodiment, the leakage-proof precise configurator comprises a cylinder 10 and a needle 40 connected with the cylinder 10, a piston 11 is arranged in the cylinder 10, a piston rod 12 is connected on the piston 11, a handle 13 is fixedly connected to the upper end of the piston rod 12, a piston cavity 101 is formed by the piston 11 and the bottom of the cylinder 10, and the interior of the needle 40 can be communicated with the piston cavity 101. The leakage-proof accurate configurator also comprises a stop valve 30 and a liquid inlet one-way valve 20 which are arranged between the needle head 40 and the needle cylinder 10, and an air bag 50 which is communicated with the piston cavity 101, wherein the side wall of the needle cylinder 10 is provided with metering scales.

In the present embodiment, the structure of the cylinder 10 and the piston 11 is similar to that of the conventional syringe, and will not be described in detail. The side wall of the syringe 10 and the bottom of the piston cavity 101 are communicated with a pipeline 60, the pipeline 60 is communicated with an air bag 50, and the air bag 50 is fixedly connected with the side wall of the syringe 10.

In the present embodiment, the cut-off valve 30 is located at the front end (the lower end shown in the figure) of the liquid inlet check valve 20, the liquid inlet check valve 20 may be a check ball valve or a check cone valve, the one-way ball valve is shown in fig. 1 and 2, the cut-off valve 30 may be a manual valve in the prior art, and is opened or closed by a person, and the structure thereof is not detailed here.

Initially, as shown in fig. 1, the piston 11 is located at the bottom of the piston cavity 101, and the piston 11 is located at the zero position of the metering scale; the air bag 50 is in a natural state, air is filled in the air bag 50, and the air pressure in the air bag 50 is equal to the external atmospheric pressure.

When the leakage-proof precise configurator is required to be used for extracting redundant liquid medicine in a medicine bottle, as shown in fig. 2, people firstly close the stop valve 30 to enable the piston cavity 101 and the air bag 50 to form a closed space, the internal air pressure is atmospheric pressure or higher than the atmospheric pressure before use, then the piston 11 is enabled to move upwards in the needle cylinder 10 through the piston rod 12 and moves to a calibrated metering scale, for example, a 1mL position, and the setting can be specifically carried out according to the requirement.

During the upward movement of the piston 11, the volume of the piston chamber 101 increases, the air in the air bag 50 enters the piston chamber 101, and the volume of the air bag 50 decreases. The structure and material of the balloon 50 are the same as those of a common inflatable balloon in hospitals, the elasticity is good, the reduced volume of the balloon 50 is smaller than the increased volume of the piston cavity 101, the total volume is increased, and negative pressure is formed in the piston cavity 101 and the balloon 50.

Next, one inserts the needle 40 into the liquid medicine in the medicine bottle, and then opens the stop valve 30, because the pressure in the medicine bottle is atmospheric pressure, the negative pressure in the piston cavity 101 and the air bag 50 forms a pressure difference, the liquid inlet check valve 20 opens automatically, the liquid medicine in the medicine bottle is sucked into the syringe 10, until there is no pressure difference, the liquid inlet check valve 20 closes automatically, at this time, the atmospheric pressure is in the piston cavity 101 and the air bag 50. To restore the initial state by increasing the volume of the air bag 50 due to the volume increase of the piston chamber 101 caused by the upward movement of the piston 11, the corresponding medical fluid is sucked from the medicine bottle so that the amount of the sucked medical fluid is equal to the pre-calibrated amount. The specific distance traveled and the amount of fluid pumped can be determined and labeled on the syringe 10.

After use, the needle 40 is covered with a cover to prevent the needle from sticking to a person.

In the present embodiment, the material of the balloon 50 is preferably, but not limited to, natural rubber or synthetic rubber, and has a certain thickness, preferably 1-2mm, so that the balloon 50 is not punctured during handling and transportation.

The utility model discloses before the extraction liquid medicine, set for the volume that needs the extraction liquid medicine in advance, guarantee the accuracy and dispense, feed liquor check valve 20 guarantees that the liquid medicine can only flow toward piston cavity 101 from syringe needle 40 in addition, and can not reverse flow, prevents from this that the syringe 10 from leaking of the syringe needle 40 department of following of liquid medicine.

In another preferred embodiment, the top of the syringe 10 is closed, and the end of the plunger rod 12 away from the plunger 11 (i.e., the upper end in the drawing) passes through the top of the syringe 10 and is located outside the syringe, thereby preventing a person pulling the plunger 11 upward and pulling the plunger 11 out of the syringe 10.

In another preferred embodiment, the piston rod 12 is connected to the top of the syringe 10 by a screw thread, the piston rod 12 is connected to the piston 11 by a rotary motion, the piston 11 is connected to the inner wall of the syringe 10 by a vertical sliding motion, for example, a sliding slot is provided on the inner wall of the syringe 10, and a sliding column matched with the sliding slot is provided on the piston 11. Of course, the piston rod 12 may be screwed to the top of the syringe 10, the piston rod 12 may be fixedly connected to the piston 11, such as by bonding, and the piston 11 may be rotated relative to the syringe 10.

People rotate the piston rod 12 to enable the piston 11 to move vertically, and after people mark the amount of extracted liquid medicine, the piston rod 12 is self-locked to ensure the position of the piston 11 in the needle cylinder 10.

Example two

The structure principle of this embodiment is basically the same as that of the first embodiment, and the difference is that, as shown in fig. 3, in this embodiment, the stop valve 30 is disposed at the rear end (i.e., the upper end in the drawing) of the liquid inlet check valve 20, in this embodiment, the liquid inlet check valve 20 may also be a one-way ball valve or a one-way cone valve, which is shown in fig. 3 as a one-way cone valve, and the valve core is provided with a support angle 21, so that after the liquid inlet check valve 20 is opened, the valve core does not block the inlet of the stop valve 30.

In another preferred embodiment, when the piston 11 is inadvertently moved in the cylinder 10, the drug solution is pushed into the balloon to prevent leakage of the drug.

In a more preferred embodiment, when the piston 11 is returned to the bottom of the cylinder 10 after the completion of suction, the entire amount of the drug solution may be pushed into the air bag to prevent leakage from occurring in the cylinder 10.

In the description herein, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. The anti-leakage precise configurator comprises a needle cylinder and a needle head connected with the needle cylinder, wherein a piston is arranged in the needle cylinder, a piston rod is connected onto the piston, a piston cavity is formed by the piston and the bottom of the needle cylinder, and the interior of the needle head can be communicated with the piston cavity; the syringe is characterized by further comprising a stop valve and a liquid inlet one-way valve which are arranged between the needle head and the syringe, and an air bag communicated with the piston cavity, wherein the side wall of the syringe is provided with metering scales.

2. A leak-resistant precision dispenser as set forth in claim 1 wherein said barrel is closed at the top and the end of said plunger rod remote from the plunger extends through and beyond the top of the barrel.

3. A leak-resistant precision dispenser as set forth in claim 2 wherein said plunger rod is threadably connected to the top of the barrel, said plunger rod is rotatably connected to the plunger, and said plunger is slidably connected to the inside wall of the barrel.

4. A leak-resistant precision dispenser as set forth in claim 2 wherein said plunger rod is threadably connected to the top of the barrel, said plunger rod being fixedly connected to the plunger, said plunger being capable of rotating relative to the barrel.

5. A leak-resistant precision dispenser as set forth in claim 1 wherein said air bladder is fixedly attached to said syringe sidewall.

6. A leak-resistant precision dispenser as set forth in claim 1 wherein said shut-off valve is located at a front end of the feed check valve or said shut-off valve is located at a rear end of the feed check valve.

7. A leak-proof precision dispenser according to any of claims 1-6, wherein the side wall of the cartridge, the bottom of the piston chamber, are connected to a conduit, which is connected to the air bag.

8. A leak-proof precision dispenser according to any of claims 1-6, wherein a handle is affixed to the end of the piston rod remote from the piston.

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