CN100560047C - Automatic medicine dispenser capable of measurement - Google Patents

Abstract

The invention discloses a meterable automatic dispensing device, which belongs to the technical field of medical instruments. It solves the problems of lack of measuring tools, difficult control, unguaranteed working accuracy and cumbersome operation process in the dispensing process. The meterable automatic dispensing device includes a dual-purpose pump for blowing and sucking, a ventilation tube and a catheter. A switching valve for blowing and sucking is connected in series between the dual-purpose pump and the ventilation tube. Both the blowing port and the suction port of the pump are connected to the blowing-suction switching valve. The metering automatic dispensing device also includes a cylindrical and vertically placed measuring cylinder. The upper interface and the lower interface are connected, the other end of the ventilation tube is connected to the upper interface of the measuring cylinder, one end of the catheter is connected to the lower interface of the measuring cylinder, and the other end of the catheter is connected to a Dispensing needles. The metering automatic dispensing device not only has accurate metering, is safe and reliable, and is convenient to operate, but also has the characteristics of simple structure and low cost.

Description

Meterable automatic dispenser

technical field

The invention relates to the technical field of medical instruments, in particular to an apparatus for infusion and medicine dispensing.

Background technique

When dispensing medicine for intravenous infusion in a hospital, the usual method of operation is to first use a syringe to extract a small amount of liquid from the infusion bottle and inject it into one or more powder injection bottles, and then draw it out and inject it into the infusion bottle after the medicine dissolves, so as to be configured as a liquid for infusion. liquid medicine. The above-mentioned operation process is more complicated and labor-intensive.

For this reason, someone has designed a kind of medical dispensing device (application number: 200420007724.0), comprises fixed frame, adorns solvent rack at one end of fixed frame, and vacuum pump is housed at the other end, also has connecting conduit, and the two ends of connecting conduit all are equipped with Needle, also has air inlet pipe, and air inlet pipe is to adorn needle at one end of rubber tube, and air filter screen is arranged at the air inlet of the other end. A buffer bottle can also be installed on the fixed frame next to the vacuum pump, and the buffer bottle is communicated with the vacuum with a conduit. The inventor has also applied for a patent (application number: 200410017880.X) called a medical dispensing device. Although the defects in the prior art have been solved to a certain extent, the following problems still exist:

1. There is a lack of measuring tools in the preparation process, so it is impossible to accurately measure the liquid medicine. Sometimes the operator needs to estimate the dose based on experience, so it is difficult to control during the application process, and the working accuracy cannot be guaranteed.

2. The structure is relatively complicated, and the operation process is cumbersome. It is necessary to pass through multiple needles and insert them into different bottles at the same time to complete one dispensing. The operability is poor, and the use cost is also high.

3. The scope of application is not wide enough. Generally, it is relatively smooth when preparing bottled medicinal liquids, but it is more difficult to prepare medicinal liquids packaged in plastic bottles, soft bags, etc. due to easy deformation.

Contents of the invention

The purpose of the present invention is to address the above problems, to provide a metering function, which can accurately prepare medicinal liquids of different specifications according to the needs, accurate metering, safe and reliable meterable automatic dispensing device; solves the lack of metering function in the prior art , It is difficult to control the proportion when preparing the liquid medicine, the dosage of the liquid medicine is difficult to control, the influence of human factors is relatively large, and the cost of dispensing is high.

Another object of the present invention is to address the above problems and provide a meterable automatic dispensing device with simple structure, reasonable design, and simple operation process, which can conveniently realize dispensing through a dispensing needle; solves the problems existing in the prior art The structure is relatively complex, the operation process is cumbersome and other technical problems.

Another object of the present invention is to address the above problems, to provide a low-cost, easy-to-operate metering automatic dispensing device; to solve the technical problems of high cost and difficult assembly and disassembly existing in the prior art.

In order to achieve the above object, the present invention adopts the following technical solutions: the metering automatic dispensing device includes a dual-purpose pump for blowing and suction, a ventilator and a catheter, and a blower is arranged between the dual-purpose pump for blowing and sucking and the ventilator. Suction switching valve, the end of the ventilation pipe, the blowing port and the suction port of the blowing-suction dual-purpose pump are all connected to the blowing-suction switching valve. It is characterized in that the automatic metering dispenser also includes a cylindrical and vertical Placed measuring cylinder, the two ends of the measuring cylinder respectively have an upper interface and a lower interface communicating with the inner cavity, the other end of the ventilation tube is connected to the upper interface of the measuring cylinder, and one end of the catheter is connected to the On the lower interface of the measuring cylinder, the other end of the catheter is connected with a medicine dispensing needle.

The present invention is creatively provided with a metering device on the automatic drug dispenser, which effectively solves the problems of lack of metering function in the prior art, difficulty in controlling the proportion and difficult control of the dose of the drug solution in the preparation of the drug solution. The measuring cylinder here is generally placed vertically. When the liquid medicine enters the measuring cylinder, the change of the amount can be observed at any time. When the required value is reached, the inhalation or extrusion of the liquid medicine is stopped, and the next step is performed. The blowing and suction switching valve can conveniently switch between blowing and suction functions.

In the above automatic metering dispenser, the dispensing needle includes a caliper-type needle base and a needle tube fixedly connected to the caliper-type needle base, and the caliper mouth of the caliper-type needle base is engaged with the catheter. During operation, pinch the end of the caliper with fingers, and the catheter can be deformed and blocked by the caliper when exerting force. When the catheter is relaxed, the catheter returns to its original shape and communicates with the needle again.

In the above-mentioned meterable automatic dispensing device, the needle tube is composed of two long needle tubes and a short needle tube which are not connected to each other. The short needle tube is sleeved at the rear of the long needle tube, and there is a certain gap, the liquid opening of the long needle tube is located at the front end of the long needle tube.

In the above-mentioned metering automatic dispensing device, an air pressure balance hole is provided on the caliper type needle holder, the short needle tube communicates with the air pressure balance hole, and a gas filter membrane is provided in the air pressure balance hole. This structure is used to maintain the air pressure balance inside and outside the infusion bottle during the dispensing process, which saves the nurse's operation.

In order to facilitate observation, in the above-mentioned metering automatic drug dispenser, the metering cylinder is made of hard transparent material, and a metering scale is provided on the barrel body.

In the above-mentioned metering automatic dosing device, a buffer tank is connected in series in the air pipe between the blowing-suction switching valve and the metering cylinder.

In the above automatic metering dispenser, the side interface of the buffer tank is connected to the metering cylinder, the top interface of the buffer tank is connected to the blow-suction switching valve, and the bottom interface of the buffer tank is provided with a liquid discharge valve. In case of a serious mistake by the operator, the liquid can flow to the lower part of the buffer tank. At this time, the liquid discharge valve can be opened to release the liquid, so as not to affect the next use.

In order to prevent dirt in the air from entering, in the above-mentioned metering automatic dispensing device, an air filter layer is provided on the upper part of the buffer tank.

In the above automatic metering dispenser, the buffer tank and the metering cylinder are connected through a movable joint. The movable joint connection can make the automatic dispensing device easy to use, and its metering cylinder and dispensing needle can be used once, which is safe and hygienic.

Compared with the existing technology, the advantages of this automatic metering dispenser are:

1. Since the metering cylinder is installed, it has a metering function, and can accurately prepare different doses of liquid medicine according to the needs, and the metering is accurate, safe and reliable; and because of the use of transparent materials, it is also more convenient to observe.

2. The structure is simple, the design is reasonable, and the operation process is simple. The dispensing can be conveniently realized through a dispensing needle, which effectively simplifies the structure of the prior art and reduces the labor intensity of medical staff.

3. Low cost and wide application range, it can be widely used in the dispensing of various types of injections (powder injections, water injections) and large infusions of various packaging materials (glass bottles, plastic bottles, soft bags).

Description of drawings

The accompanying drawing is a schematic structural view of the metered automatic dispensing device provided by the present invention.

In the figure, blow-suction dual-purpose pump 1, ventilation tube 2, catheter tube 3, blow-suction switching valve 4, metering cylinder 5, upper interface 51, lower interface 52, dispensing needle 6, caliper-type needle seat 61, and long needle tube 62 , short needle tube 63, caliper mouth 611, air pressure balance hole 612, liquid port 621, air pressure balance hole 622, buffer tank 7, side interface 71, top connection 72, bottom interface 73, air filter layer 74, drain valve 8, Movable joint 9, body part A, disposable dispensing tube part B.

Detailed ways

As shown in the figure, the meterable automatic dispensing device can be divided into two parts: a body part A and a disposable dispensing tube part B. Body A is mainly composed of blow-suction dual-purpose pump 1 , blow-suction switching valve 4 and buffer tank 7; The switching valve 4 and the metering cylinder 5 are connected through a movable joint 9 . The body A and the disposable medicine dispensing tube part B can be connected through the movable joint 9, so that the disposable medicine dispensing tube part B can be replaced after a liquid medicine preparation is completed, so that the medicine dispensing process is safe and hygienic.

A blow-suction switching valve 4 is connected in series between the blow-suction dual-purpose pump 1 and the ventilation pipe 2, and the end of the ventilation pipe 2, the blowing port and the suction port of the blow-suction dual-purpose pump 1 are all connected to the blow-suction switching valve 4 on. The other end of the vent pipe 2 is connected to the upper port 51 of the metering cylinder 5 . The metering cylinder 5 is placed vertically, one end of the catheter 3 is connected to the lower interface 52 of the metering cylinder 5 , and the other end of the catheter 3 is connected to a dispensing needle 6 . The measuring cylinder 5 is made of hard transparent material, and a measuring scale is arranged on the cylinder body. In this way, the dosage of the medicinal solution can be precisely controlled by observing the height of the liquid level in the metering cylinder 5 during the dispensing process.

The dispensing needle 6 includes a caliper type needle base 61 , a long needle tube 62 and a short needle tube 63 fixedly connected with the caliper type needle base 61 , and the short needle tube 63 is sleeved on the rear portion of the long needle tube 62 . The caliper mouth 611 of the caliper needle hub 61 is engaged with the soft catheter 3 . The liquid opening 621 of the long needle tube 62 is located at the front end of the long needle tube 62 . An air pressure balance hole 622 is provided on the short needle tube 63 or at the gap between the short needle tube 63 and the long needle tube 62 . An air pressure balance hole 612 is also provided on the caliper needle base 61 , and the two air pressure balance holes 612 and 622 are connected. In this embodiment, an air filter membrane is provided in the air pressure balance hole 612 to prevent dirty air from entering the medicine bottle. Fingers pinch the caliper end during operation, and the catheter tube 3 can be deformed by the caliper to block the circulation of the medicinal liquid when exerting force.

A buffer tank 7 is connected in series on the catheter tube 3 between the suction switching valve 4 and the metering cylinder 5 . The side port 71 of the buffer tank 7 is connected to the metering cylinder 5 , the top port 72 of the buffer tank 7 is connected to the blow-suction switching valve 4 , and the bottom port 73 of the buffer tank 7 is provided with a liquid discharge valve 8 . An air filter layer 74 is provided on the top of the buffer tank 7 . The air filter layer 74 can ensure that the air flow passing through the dispensing tube is hygienic. When the operator makes a serious mistake and the liquid flows to the bottom of the buffer tank 7, the drain valve 8 can be opened to discharge the liquid, so as not to affect the next use.

When in use, connect the disposable dispensing tube B to the body A, place the metering cylinder 5 vertically on the body A, make the blowing-suction dual-purpose pump 1 work, and pinch the caliper needle seat 61 of the dispensing needle 6 with the index finger and thumb , insert the dispensing needle 6 into the large infusion bottle, adjust the blow-suction switching valve 4 to the state of inhalation, at this time, the liquid is quickly sucked into the metering cylinder 5, to the required scale, pinch the caliper end of the needle seat 61 , pull out the dispensing needle 6, and insert the dispensing needle 6 into the small reagent bottle that needs to be prepared, switch the blowing and suction switching valve 4 to the blowing state, and inject the medicinal solution. If it is necessary to prepare multiple medicaments, it is also necessary to pinch the caliper end of the needle holder 61, pull out the dispensing needle 6 and insert it into other injection bottles. After the medicament in the injection bottle is dissolved, the liquid medicine is sucked into the metering cylinder 5 respectively, and then injected into the large infusion bottle, and the dispensing process is completed.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Although this article uses more blow-suction dual-purpose pump 1, ventilation tube 2, catheter tube 3, blow-suction switching valve 4, metering cylinder 5, upper interface 51, lower interface 52, dispensing needle 6, caliper needle seat 61 , long needle tube 62, short needle tube 63, caliper nozzle 611, air pressure balance hole 612, liquid port 621, air pressure balance hole 622, buffer tank 7, side interface 71, top interface 72, bottom interface 73, air filter layer 74, row Liquid valve 8, movable joint 9, body part A, disposable dispensing tube part B and other terms, but the possibility of using other terms is not excluded. These terms are used only for the purpose of describing and explaining the essence of the present invention more conveniently; interpreting them as any kind of additional limitation is against the spirit of the present invention.

Claims (7)

1. A meterable automatic dispensing device, which includes a dual-purpose pump (1), a ventilation tube (2) and a catheter (3), and the dual-purpose pump (1) and the ventilation tube (2) A blow-suction switching valve (4) is arranged between them, and the end of the ventilation pipe (2), the blowing port and the suction port of the blowing-suction dual-purpose pump (1) are all connected to the blowing-suction switching valve (4). It is characterized in that the metering automatic dosing device also includes a cylindrical and vertically placed metering barrel (5), and the two ends of the metering barrel (5) respectively have an upper port (51) and a lower port communicating with its inner cavity. interface (52), the other end of the vent tube (2) is connected to the upper interface (51) of the measuring cylinder (5), and one end of the catheter (3) is connected to the lower end of the measuring cylinder (5). On the interface (52), the other end of the catheter (3) is connected with a medicine dispensing needle (6); the medicine dispensing needle (6) includes a caliper type needle seat (61), and the The needle tube, the caliper mouth (611) of the caliper type needle seat (61) is engaged with the catheter (3); A buffer tank (7) is connected in series in (2), and a drain valve (8) is provided at the bottom interface (72) of the buffer tank (7). 2. The meterable automatic dispensing device according to claim 1, characterized in that, the needle tube is composed of two long needle tubes (62) and a short needle tube (63) that are not connected to each other, and the short needle tube (63) Cover the rear part of the long needle tube (62), and there is a certain gap between the long needle tube (62) and the short needle tube (63), the liquid opening (621) of the long needle tube (62) is located at the front end of the long needle tube (62) department. 3. The metering automatic dispensing device according to claim 2, characterized in that, the caliper needle holder (61) is provided with an air pressure balance hole (612), and the short needle tube (63) is balanced with the air pressure The holes (612) are connected with each other, and a gas filter membrane is arranged in the air pressure balance hole (612). 4. The metering automatic drug dispenser according to claim 1, 2 or 3, characterized in that, the metering cylinder (5) is made of hard transparent material, and a metering scale is provided on the cylinder body. 5. The metering automatic dispensing device according to claim 4, characterized in that, the side interface (71) of the buffer tank (7) is connected to the metering cylinder (5), and the top interface of the buffer tank (7) ( 72) Link to each other with blow-suction switching valve (4). 6. The automatic metering dispenser according to claim 4, characterized in that an air filter layer (74) is provided on the upper part of the buffer tank (7). 7. The automatic metering dispenser according to claim 4, characterized in that, the buffer tank (7) is connected to the metering cylinder (5) through a movable joint (9).

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