CN215539846U - Filter for contrast medium - Google Patents

Abstract

The application discloses filter for contrast medium, including last shell, lower shell and filtration membrane, it is fixed with lower shell butt joint to go up the shell, go up the shell and have last viscose hole, go up and expand chamber and go up the inner chamber, it is the toper chamber that the internal diameter from top to bottom enlarges gradually to go up to expand the chamber, go up the tip that expands the chamber with go up the viscose hole and connect, go up the tip that expands the chamber with go up the inner chamber and connect, the shell has lower inner chamber, expands chamber and lower viscose hole down, it is the toper chamber that the internal diameter from top to bottom reduces gradually to expand the chamber down, expand the tip in chamber down with the inner chamber is connected down, expand the tip in chamber down with down the viscose hole is connected, filtration membrane fixes between last shell and the lower shell, go up the inner chamber and the inner chamber butt joint down and by filtration membrane separates. By arranging the conical upper and lower expansion cavities, the flow resistance of the liquid medicine can be effectively reduced, the throughput of the liquid medicine can be effectively increased, and the contrast agent can conveniently pass through the conical upper and lower expansion cavities to avoid blockage.

Description

Filter for contrast medium

Technical Field

The utility model relates to the field of medical instruments, in particular to a filter for a contrast agent.

Background

The existing filter for the contrast agent is disposable, and the liquid medicine passing resistance is large because the flow guide groove arranged in the filter is semicircular, so that the channel is easily blocked, and the clinical use is influenced. In addition, the contrast agent has certain density and the characteristic that the contrast agent is easy to crystallize when exposed to light, the filter is easy to block a liquid medicine filtering membrane under the condition of secondary use, when the filter is applied to a connecting pipeline for repeated injection, the blockage of the filter is easy to form great pressure in the liquid medicine pipeline, and after the filter is identified by a pressure sensor, if the pressure sensor exceeds the pressure range of equipment, the equipment can report an error, and the equipment can mistakenly think that the indwelling needle connected with the human vein is inserted at an incorrect position. Therefore, it is necessary to provide a new filter for contrast medium.

SUMMERY OF THE UTILITY MODEL

The present invention provides a novel filter for a contrast medium.

The utility model provides a filter for a contrast agent, which comprises an upper shell, a lower shell and a filter membrane, wherein the upper shell and the lower shell are fixedly butted, the upper shell is provided with an upper sticky tube hole, an upper expansion cavity and an upper inner cavity which are sequentially arranged from top to bottom along the axis of the upper shell, the upper expansion cavity is a conical cavity with the inner diameter gradually enlarged from top to bottom, the small end of the upper expansion cavity is connected with the upper adhesive tube hole, the big end of the upper expansion cavity is connected with the upper inner cavity, the lower shell is provided with a lower inner cavity, a lower expansion cavity and a lower sticky tube hole which are sequentially arranged from top to bottom along the axis of the lower shell, the lower expansion cavity is a conical cavity with the inner diameter gradually reduced from top to bottom, the large end of the lower expansion cavity is connected with the lower inner cavity, the small end of the lower expansion cavity is connected with the lower sticky tube hole, the filtering membrane is fixed between the upper shell and the lower shell, and the upper inner cavity and the lower inner cavity are in butt joint and are separated by the filtering membrane. The upper and lower housings can be ultrasonically heat staked to form a unitary housing.

The small end of the upper expansion cavity is connected with the upper sticky pipe hole through an upper transition cavity, and the small end of the lower expansion cavity is connected with the lower sticky pipe hole through a lower transition cavity. The inner diameter of the upper transition cavity can be smaller than that of the upper sticky pipe hole. The inner diameter of the upper transition chamber may be equal to the inner diameter of the small end of the upper expansion chamber. The inner diameter of the lower transition chamber may be smaller than the inner diameter of the lower bond tube bore. The inner diameter of the lower transition chamber may be equal to the inner diameter of the small end of the lower expansion chamber. The upper and lower transition chambers may be cylindrical chambers.

One of the upper shell and the lower shell is provided with a positioning column, the other of the upper shell and the lower shell is provided with a positioning hole, and the positioning column is in inserted fit with the positioning hole.

The upper bonding pipe hole and the lower bonding pipe hole are cylindrical holes, the upper inner cavity and the lower inner cavity are cylindrical cavities, and the upper transition cavity and the lower transition cavity are cylindrical cavities. The upper inner cavity and the lower inner cavity can only consist of one section of cylindrical cavity with equal inner diameter or consist of a plurality of sections of cylindrical cavities with equal inner diameter, and the inner diameters of the sections of cylindrical cavities can be different, namely the upper inner cavity and the lower inner cavity can be stepped cylindrical cavities.

The depth of the upper expansion cavity is larger than that of the upper inner cavity, the inner diameter of the upper inner cavity is larger than those of the upper expansion cavity and the upper sticky tube hole, the depth of the lower expansion cavity is larger than that of the lower inner cavity, and the inner diameter of the lower inner cavity is larger than those of the lower expansion cavity and the lower sticky tube hole.

The taper of the upper expansion cavity is equal to the taper of the lower expansion cavity. The cavity walls of the upper and lower expansion cavities are obliquely arranged, and the included angles between the cavity walls and the axis of the shell are equal.

The filter membrane is characterized in that a plurality of upper fixing columns are convexly arranged at the bottom of the upper inner cavity in a row, a plurality of lower fixing columns are convexly arranged at the bottom of the lower inner cavity in a row, the upper fixing columns and the lower fixing columns are aligned one by one, and the upper fixing columns and the lower fixing columns which are opposite to each other abut against the filter membrane at the upper side and the lower side respectively.

One of the upper fixing columns traverses the opening of the upper expansion cavity at the bottom of the upper inner cavity, and one of the lower fixing columns traverses the opening of the lower expansion cavity at the bottom of the lower inner cavity.

The upper shell is provided with a bottom end face butted with the lower shell, the lower shell is provided with a top end face butted with the upper shell, the upper inner cavity is concavely arranged on the bottom end face, the lower inner cavity is concavely arranged on the top end face, the bottom end face is downwards convexly provided with an annular first upper peripheral wall and an annular second upper peripheral wall, the first upper peripheral wall surrounds the second upper peripheral wall, the top end face is concavely provided with an annular lower matching groove, the first upper peripheral wall sleeves the outer peripheral face of the lower shell, and the second upper peripheral wall is in plug-in matching with the lower matching groove.

The utility model has the beneficial effects that: by arranging the conical upper and lower expansion cavities, the flow resistance of the liquid medicine can be effectively reduced, the throughput of the liquid medicine can be effectively increased, and the contrast agent can conveniently pass through the conical upper and lower expansion cavities to avoid blockage.

Drawings

Fig. 1 is an exploded perspective view of a contrast medium filter according to the present embodiment;

fig. 2 is a sectional view of the contrast medium filter according to the present embodiment;

FIG. 3 is an enlarged view of a portion of FIG. 2 indicated by P;

fig. 4 is a perspective view of the upper case of the present embodiment from the bottom;

fig. 5 is a bottom view of the upper housing of the present embodiment;

fig. 6 is a plan view of the lower case of the present embodiment.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments, and the operation steps involved in the embodiments may be interchanged or modified in order as will be apparent to those skilled in the art. Accordingly, the description and drawings are merely for clarity of description of certain embodiments and are not intended to necessarily refer to a required composition and/or order.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

As shown in fig. 1 to 6, a contrast medium filter includes a housing 4 and a filter membrane 3. The housing 4 has a liquid medicine passage 41 extending vertically along the axis thereof, and the liquid medicine passage 41 is configured to allow a contrast medium to pass therethrough. The liquid medicine passage 41 includes an upper viscous tube hole 12, an upper expansion chamber 13, an inner chamber, a lower expansion chamber 23, and a lower viscous tube hole 24, which are sequentially arranged from top to bottom along an axis. The upper adhesive tube hole 12 can be fixedly adhered with a hollow liquid medicine hose made of soft materials. The upper expansion cavity 13 is a tapered cavity with an inner diameter gradually increasing from top to bottom, the small end with the smallest inner diameter is connected with the upper adhesive tube hole 12, and the large end with the largest inner diameter is connected with the inner cavity. The filtering membrane 3 is fixed to the inner lumen and divides the inner lumen into an upper lumen 14 and a lower lumen 24. The big end of the upper expansion cavity 13 is connected with an upper inner cavity 14, the inner diameter of the upper inner cavity 14 is far larger than that of the upper expansion cavity 13, and the depth of the upper inner cavity 14 is smaller than that of the upper expansion cavity 13. The lower expansion chamber 23 is a tapered chamber having an inner diameter gradually decreasing from top to bottom, and a large end having a largest inner diameter is connected to the lower inner chamber 24, and a small end having a smallest inner diameter is connected to the lower adhesive tube hole 22. The inner diameter of the lower inner cavity 24 is much larger than that of the lower expansion cavity 23, and the depth of the lower inner cavity 24 is smaller than that of the lower expansion cavity 23. The lower tube hole 22 can be fixedly bonded with a hollow medical fluid hose made of a soft material.

The inner diameter of the small end of the upper expansion cavity 13 can be smaller than that of the upper adhesive tube hole 12. The depth of the upper extension cavity 13 may be less than the depth of the upper adhesive tube hole 12. The inner diameter of the small end of the lower expansion chamber 23 may be smaller than the inner diameter of the lower adhesive tube hole 22. The depth of the lower expansion chamber 23 may be less than the depth of the lower visco-pore bore 22. The filter membrane 3 is a square or round mesh sheet, and can block particles of a corresponding grade in the atmosphere and prevent cross contamination between particles or bacteria in the atmosphere and the liquid medicine in the liquid medicine passage 41.

In this embodiment, the upper pipe-sticking hole 12 and the lower pipe-sticking hole 22 may be cylindrical holes. The upper and lower lumens 14, 24 may also be cylindrical lumens. The upper and lower expansion chambers 13, 23 are tapered chambers having a certain depth, that is, the chamber walls of the upper and lower expansion chambers 13, 23 are inclined planes having an acute angle with the axis of the housing 4. By providing the tapered expansion chambers 13 and 23, resistance to the flow of the liquid medicine can be effectively reduced. Generally, the larger the inner diameter, depth and inclination of the inclined plane of the expansion chamber 13, 23, the more advantageous the flow of the liquid medicine is, within the design allowance.

In this embodiment, the tapers of the upper expansion cavity 13 and the lower expansion cavity 23 are the same, and the inner diameters of the large ends thereof may be the same, that is, the inclined angles of the walls of the upper and lower expansion cavities may be the same, thereby avoiding the formation of steps and increasing the flow resistance of the liquid medicine.

As shown in fig. 1 to 6, a contrast medium filter includes a housing 4 and a filter membrane 3. The housing 4 comprises an upper housing 1 and a lower housing 2 which can be butt-fixed. The upper shell 1 is provided with a medicine feeding channel 11 which is penetrated along the axis, and the medicine feeding channel 11 comprises an upper adhesive tube hole 12, an upper expansion cavity 13 and an upper inner cavity 14 which are sequentially arranged along the axis. The upper tube-sticking hole 12 is a cylindrical hole, which can be adhesively fixed with the liquid medicine hose. The upper expansion chamber 13 is a tapered chamber whose inner diameter is gradually increased from top to bottom, and has a small end with the smallest inner diameter and a large end with the largest inner diameter, the inner diameter of the small end is not larger than the inner diameter of the upper adhesive tube hole 12, and the inner diameter of the large end is larger than the inner diameter of the upper adhesive tube hole 12. An upper transition cavity 15 is arranged between the upper expansion cavity 13 and the upper sticky pipe hole 12, the large end of the upper expansion cavity 13 is connected with the upper inner cavity 14, and the upper transition cavity 15 is connected with the small ends of the upper sticky pipe hole 12 and the upper expansion cavity 13. In the axial direction along the housing 4, the upper housing 1 is located above and the lower housing 2 is located below. The upper housing 1 and the lower housing 2 may be coaxial, i.e. the axis of the entire housing. The direction indicated by arrow a in fig. 2 is from the top to the bottom.

The lower housing 2 has substantially the same structure as the upper housing 1, and the lower housing 2 has a lower liquid medicine passage 21 penetrating up and down along its axis. The liquid medicine feeding channel 21 comprises a lower inner cavity 24, a lower expansion cavity 23 and a lower adhesive tube hole 22 which are sequentially arranged along the axis. The lower expansion chamber 23 is a tapered chamber having an inner diameter gradually decreasing from top to bottom, and has a small end having a smallest inner diameter and a large end having a largest inner diameter, the inner diameter of the small end is not greater than the inner diameter of the lower adhesive tube hole 22, and the inner diameter of the large end is greater than the inner diameter of the lower adhesive tube hole 22. A lower transition cavity 25 is arranged between the lower expansion cavity 23 and the lower tube sticking hole 22. The big end of the lower expansion cavity 23 is connected with the lower inner cavity 24, and the lower transition cavity 25 is connected with the lower tube sticking hole 22 and the small end of the lower expansion cavity 23. The lower tube hole 22 can be fixedly bonded to a medical fluid hose made of a flexible material.

The filter membrane 3 is a circular or square mesh sheet capable of filtering particles of a specific size from the atmosphere, and the filter membrane 3 is fixed between the upper and lower lumens 14 and 24.

The upper housing 1 has a bottom end face 16 facing the lower housing 2, the upper inner cavity 14 is formed by recessing the bottom end face 16, and the upper expansion cavity 13 forms an opening at the bottom of the upper inner cavity 14, that is, the upper expansion cavity 13 penetrates through the bottom of the upper inner cavity 14. The lower housing 2 has a top end surface 26 facing the upper housing 1, the lower inner cavity 24 is formed by recessing from the top end surface 26, and the lower expansion cavity 23 forms an opening at the bottom of the lower inner cavity 24, i.e. the lower expansion cavity 23 penetrates through the bottom of the lower inner cavity 24.

The cavity bottom of the upper inner cavity 14 is convexly provided with a plurality of upper fixing columns 17 in rows, each row is provided with a plurality of upper fixing columns 17, two adjacent upper fixing columns 17 in each row are spaced at a certain distance, and two adjacent rows are spaced at a certain distance. For the middle row, it includes a longer upper fixing post 17a, the upper fixing post 17a traverses the opening of the upper expansion chamber 13 at the bottom of the upper inner chamber 14, and the middle part of the upper fixing post 17a is connected with the chamber wall of the upper expansion chamber 13 through two supporting posts 19.

The cavity bottom of the lower inner cavity 24 is convexly provided with a plurality of lower fixing columns 27 in rows, each row is provided with a plurality of lower fixing columns 27, two adjacent lower fixing columns 27 in each row are spaced at a certain distance, and two adjacent rows are spaced at a certain distance. For the middle row, it includes a longer lower fixing column 27a, the lower fixing column 27a traverses the opening of the lower expansion chamber 23 at the bottom of the lower inner chamber 24, and the middle part of the lower fixing column 27 is connected with the chamber wall of the lower expansion chamber 23 through two supporting columns. The upper fixing posts 17 correspond to the lower fixing posts 27 one by one, and each upper fixing post 17 is vertically aligned with the corresponding lower fixing post 27.

The bottom end face 16 of the upper housing and the top end face 26 of the lower housing are butted, and the edge portion of the filter membrane 3 is fixed between the top end face 26 and the bottom end face 16. The upper fixing post 17 and the lower fixing post 27, which are aligned with each other, abut against the middle portion of the filter membrane 3 from the upper and lower sides, respectively.

In the present embodiment, the bottom end surface 16 of the upper housing 1 is further provided with a first annular upper peripheral wall 161 and a second annular upper peripheral wall 162, the first upper peripheral wall 161 and the second upper peripheral wall 162 are provided at an interval, and the first upper peripheral wall 161 surrounds the second upper peripheral wall 162. The top end surface 26 of the lower housing is concavely provided with an annular lower mating groove 261. When the upper housing 1 and the lower housing 2 are butted, the first upper peripheral wall 161 of the upper housing 1 covers the outer peripheral surface of the lower housing 2, and the second peripheral wall 162 is fitted into the lower fitting groove 261. In order to prevent the upper and lower housings from being mistakenly mounted, the upper housing 1 may be provided with positioning holes 18, and the lower housing 2 may be correspondingly provided with positioning posts 28, wherein the positioning posts 28 and the positioning holes 18 can be in plug-in fit.

In this embodiment, the upper and lower tube holes 12, 22 may be cylindrical holes. The inner diameter of the small end of the upper expansion cavity 13 may be not greater than the inner diameter of the upper sticky pipe hole 12, and the inner diameter of the large end thereof may be greater than the inner diameter of the upper sticky pipe hole 12. The inner diameter of the small end of the lower expansion chamber 23 may be not greater than the inner diameter of the lower sticky tube hole 22, and the inner diameter of the large end thereof may be greater than the inner diameter of the lower sticky tube hole 22. The inner diameter of the upper transition chamber 15 can be equal to the inner diameter of the small end of the upper expansion chamber 13 and is smaller than the inner diameter of the upper sticky tube hole 12. The inner diameter of the lower transition chamber 25 may be equal to the inner diameter of the small end of the lower expansion chamber 23 and smaller than the inner diameter of the lower sticky tube hole 22.

As for the contrast medium filter, the conical upper and lower expansion cavities 13 and 23 are arranged, so that the flow resistance of liquid medicine can be effectively reduced, the throughput of the liquid medicine can be effectively increased, and the contrast medium can conveniently pass through to avoid blockage. Through setting up upper and lower fixed column 17, 27, form vertical guiding gutter at the edge of upper and lower fixed column, can further reduce liquid medicine flow resistance. Compared with the existing filter, the filter with the expansion cavity and the fixing column can empty the liquid medicine more quickly under the action of the self gravity of the liquid medicine.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the utility model and are not intended to be limiting. For a person skilled in the art to which the utility model pertains, several simple deductions, modifications or substitutions may be made according to the idea of the utility model.

Claims (9)

1. A filter for contrast medium is characterized by comprising an upper shell, a lower shell and a filter membrane, the upper shell and the lower shell are fixed in a butt joint way, the upper shell is provided with an upper sticky tube hole, an upper expansion cavity and an upper inner cavity which are sequentially arranged from top to bottom along the axis of the upper shell, the upper expansion cavity is a conical cavity with the inner diameter gradually enlarged from top to bottom, the small end of the upper expansion cavity is connected with the upper adhesive tube hole, the big end of the upper expansion cavity is connected with the upper inner cavity, the lower shell is provided with a lower inner cavity, a lower expansion cavity and a lower sticky tube hole which are sequentially arranged from top to bottom along the axis of the lower shell, the lower expansion cavity is a conical cavity with the inner diameter gradually reduced from top to bottom, the large end of the lower expansion cavity is connected with the lower inner cavity, the small end of the lower expansion cavity is connected with the lower sticky tube hole, the filtering membrane is fixed between the upper shell and the lower shell, and the upper inner cavity and the lower inner cavity are in butt joint and are separated by the filtering membrane.

2. The filter for contrast medium according to claim 1, wherein the bottom of the upper cavity is provided with a plurality of upper fixing posts protruding downward in a row, and each row is provided with a plurality of upper fixing posts arranged at intervals; the cavity bottom of the lower inner cavity is convexly provided with a plurality of lower fixing columns in upward rows, each row is provided with a plurality of lower fixing columns arranged at intervals, the upper fixing columns and the lower fixing columns are aligned one by one, and the upper fixing columns and the lower fixing columns which are opposite to each other are respectively propped against the filtering membrane at the upper side and the lower side.

3. The contrast media filter according to claim 2, wherein one of said upper fixing posts traverses an opening of said upper expansion chamber at a bottom of said upper inner chamber, and one of said lower fixing posts traverses an opening of said lower expansion chamber at a bottom of said lower inner chamber.

4. The contrast media filter of claim 2, wherein the taper of the upper expansion chamber is equal to the taper of the lower expansion chamber.

5. The contrast media filter according to claim 1, wherein one of the upper and lower housings is provided with positioning posts, and the other of the upper and lower housings is provided with positioning holes, and the positioning posts are inserted and fitted into the positioning holes.

6. The contrast media filter according to claim 1, wherein the upper expansion chamber has a depth greater than that of the upper inner chamber, the upper inner chamber has an inner diameter greater than that of the upper expansion chamber and the upper viscous tube hole, the lower expansion chamber has a depth greater than that of the lower inner chamber, and the lower inner chamber has an inner diameter greater than that of the lower expansion chamber and the lower viscous tube hole.

7. The contrast media filter according to claim 6, wherein the small end of the upper expansion chamber is connected to the upper visco-pore via an upper transition chamber, and the small end of the lower expansion chamber is connected to the lower visco-pore via a lower transition chamber.

8. The contrast media filter of claim 7, wherein said upper and lower visco-tube apertures are cylindrical apertures, said upper and lower lumens are cylindrical cavities, and said upper and lower transition cavities are cylindrical cavities.

9. The contrast media filter according to claim 1, wherein the upper housing has a bottom end surface abutting against the lower housing, the lower housing has a top end surface abutting against the upper housing, the upper cavity is recessed in the bottom end surface, the lower cavity is recessed in the top end surface, the bottom end surface is provided with a first annular upper peripheral wall and a second annular upper peripheral wall protruding downward, the first upper peripheral wall surrounds the second upper peripheral wall, the top end surface is provided with a recessed annular lower fitting groove, the first upper peripheral wall fits around an outer peripheral surface of the lower housing, and the second upper peripheral wall fits into the lower fitting groove.

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