CN204864356U - Accurate liquid liquid medicine filter that ends of disposable - Google Patents

Abstract

The utility model discloses a one-time precision anti-liquid liquid medicine filter, which comprises a lower shell, a liquid medicine filter membrane, an upper shell, an air filter membrane and an exhaust hole, and the upper shell is installed on the bottom of the lower shell. Above, the liquid medicine filter membrane is installed between the upper casing and the lower casing, the vent hole is located on the upper casing, and the air filter membrane is installed on the inner side of the upper casing corresponding to the vent hole. The right side of the upper housing is provided with a liquid inlet port, and the left side of the lower housing is provided with a liquid outlet port. The utility model is simple in structure, has the functions of anti-flow, returning blood, self-exhausting and automatic liquid stop, and can achieve the effect of precision filtration, and the filtration rate of insoluble particles of 1.2 μm to 5 μm in the liquid medicine is greater than 90%. The effect of anti-flow and blood return is achieved through the liquid medicine filter membrane, which reduces the cost.

Description

Disposable precision liquid stop liquid filter

technical field

The utility model relates to the technical field of medical equipment, in particular to a one-time use precision liquid stopper liquid filter.

Background technique

After years of clinical application, it has been found that disposable ordinary infusion sets have also exposed some thorny problems in use. In the past, the filter medium of infusion sets used in China generally has a pore size of 15 μm, which has almost no interception effect on particles with a diameter of less than 15 μm. Particles larger than 10 μm account for only about 1%, and particles smaller than 10 μm account for about 98%. Adverse reactions and long-term effects of infusion are unavoidable. In the process of clinical intravenous infusion, when the liquid is nearly finished, the blood backflow phenomenon will occur when the sum of the human meridian pressure and hydrostatic pressure is greater than the atmospheric pressure, causing the pipeline to be filled with blood, which will cause a lot of inconvenience and harm. Most of the precision infusion sets for anti-backflow of blood are mostly equipped with anti-backflow devices in the drip funnel, which has a complex structure and high cost.

Utility model content

The purpose of this utility model is to provide a simple structure, automatic stop liquid disposable precision stop liquid medicinal liquid filter, in order to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A one-time use precision liquid stop liquid filter, comprising a lower casing, a liquid medicine filter membrane, an upper casing, an air filter membrane and an exhaust hole, the upper casing is installed above the lower casing, the medicine The liquid filter membrane is installed between the upper casing and the lower casing, the vent hole is located on the upper casing, and the air filter membrane is installed inside the upper casing corresponding to the vent hole.

As a further solution of the utility model: a liquid inlet port is provided on the right side of the upper casing.

As a further solution of the present invention: the left side of the lower casing is provided with a liquid outlet port.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model is simple in structure, has the functions of anti-flow, returning blood, self-exhausting and automatic liquid stop, and can achieve the effect of precise filtration, and the filtration rate of 1.2 μm insoluble particles in the liquid medicine is greater than 90%. The liquid filter membrane is used to achieve the effect of preventing flow and returning blood, which reduces the cost.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the front plan view of the utility model.

Fig. 3 is the reverse bottom view of the utility model.

Detailed ways

The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

Please refer to Fig. 1-3, a kind of one-time use precise liquid stop liquid medicine filter, comprises lower shell 1, liquid medicine filter membrane 2, upper shell 3, air filter membrane 4 and exhaust hole 5, said upper The casing 3 is installed above the lower casing 1, the liquid medicine filter membrane 2 is installed between the upper casing 3 and the lower casing 1, the exhaust hole 5 is located on the upper casing 3, and the air filter membrane 4 is installed inside the upper casing 3 corresponding to the exhaust hole 5, the upper casing 3 is provided with a liquid inlet port 6 on the right side, and the lower casing 1 is provided with a liquid outlet port 7 on the left side.

When the one-time-use precision liquid stop liquid filter is produced, the upper casing 3 and the lower casing 1 are both made of medical polymer plastics through injection molding, and a polyamide is placed in the middle of the upper casing 3 and the lower casing 1. The ether sulfone filter membrane acts as the filter membrane 2 for the liquid medicine. After the upper shell 3, the lower shell 1 and the liquid medicine filter membrane 2 are assembled, they are welded together by ultrasonic waves. The liquid enters from the liquid inlet port 6, and the liquid medicine After the liquid medicine filter membrane 2 is filtered, the insoluble particles in it can be intercepted and filtered out by the filter membrane. Under the action of atmospheric pressure, the liquid in the bottle flows into the thinner infusion tube to form hydrostatic pressure. When the hydrostatic pressure is greater than the venous pressure When the liquid in the bottle flows into the vein, when the liquid medicine is almost infused, under the action of the surface tension of the liquid medicine filter membrane 2 in the filter, the venous pressure and the gravitational pressure force in the wall of the infusion tube are different from the force of the liquid medicine. The surface tension of the filter membrane 2 is balanced, that is, under the comprehensive force of atmospheric pressure, hydrostatic pressure, and human veins, the medicinal liquid is kept in the infusion set to achieve the function of automatically stopping the liquid and preventing backflow of blood.

The utility model is simple in structure, has the functions of anti-flow, returning blood, self-exhausting and automatic liquid stop, and can achieve the effect of precise filtration, and the filtration rate of 1.2 μm insoluble particles in the liquid medicine is greater than 90%. The liquid medicine filter membrane 2 is used to achieve the effects of anti-flow and returning blood, which reduces the cost.

The preferred implementation of this patent has been described in detail above, but this patent is not limited to the above-mentioned implementation. Within the scope of knowledge possessed by those of ordinary skill in the art, various modifications can be made without departing from the purpose of this patent. kind of change.

Claims (3)

1. a single use precision only liquid liquid medicine filter, it is characterized in that, comprise lower house (1), liquid medicine filtering membrane (2), upper shell (3), air-filtering membrane (4) and steam vent (5), described upper shell (3) is arranged on the top of lower house (1), described liquid medicine filtering membrane (2) is arranged between upper shell (3) and lower house (1), described steam vent (5) is positioned on upper shell (3), and described air-filtering membrane (4) is arranged on the inner side of upper shell (3) corresponding to steam vent (5).

2. single use precision according to claim 1 only liquid liquid medicine filter, it is characterized in that, the right side of described upper shell (3) is provided with feed liquor port (6).

3. single use precision according to claim 1 only liquid liquid medicine filter, it is characterized in that, the left side of described lower house (1) is provided with fluid port (7).