阅读说明：本技术 造影剂用过滤器 (Filter for contrast medium ) 是由 林升清 陈志秋 于 2021-10-12 设计创作，主要内容包括：本申请公开了一种造影剂用过滤器,包括过滤膜及具有轴线的外壳,所述外壳具有沿所述轴线上下贯穿的药液通道,所述药液通道包括沿所述轴线顺次设置的上粘管孔、上扩充腔、内腔、下扩充腔及下粘管孔,所述过滤膜固定于所述内腔并将所述内腔分隔为上内腔和下内腔,所述上扩充腔是内径由上至下逐渐增大的锥形腔,所述上扩充腔的小端与所述上粘管孔连接,所述上扩充腔的大端与所述上内腔连接,所述下扩充腔是内径由上至下逐渐减小的锥形腔,所述下扩充腔的大端与所述下内腔连接,所述下扩充腔的小端与所述下粘管孔连接。通过设置锥形上、下扩充腔,能够有效减小药液流动阻力,能够有效增加药液通过量,方便造影剂通过而避免造成堵塞。(The application discloses filter for contrast medium, include filtration membrane and have the shell of axis, the shell has the edge the liquid medicine passageway that runs through from top to bottom of axis, the liquid medicine passageway includes the edge the axis sets up in order on glue the tube hole, extend chamber, inner chamber, expand the chamber down and glue the tube hole down, filtration membrane is fixed in the inner chamber will the inner chamber separates for last inner chamber and lower inner chamber, it is the toper chamber that the internal diameter from top to bottom crescent to extend the chamber on, on extend the chamber the tip with on glue the tube hole and connect, on extend the chamber the tip with go up the inner chamber and connect, it is the toper chamber that the internal diameter from top to bottom gradually reduces to extend the chamber down, extend the chamber the tip down with the inner chamber is connected, extend the chamber the tip down with glue the tube hole and connect down. 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.)

1. A filter for a contrast medium is characterized by comprising a filtering membrane and a shell with an axis, wherein the shell is provided with a liquid medicine channel which penetrates through the shell up and down along the axis, the liquid medicine channel comprises an upper sticky tube hole, an upper expansion cavity, an inner cavity, a lower expansion cavity and a lower sticky tube hole which are sequentially arranged along the axis, the filtering membrane is fixed in the inner cavity and divides the inner cavity into the upper inner cavity and the lower inner cavity, the upper expansion cavity is a conical cavity with the inner diameter gradually increased from top to bottom, the small end of the upper expansion cavity is connected with the upper sticky tube hole, the large end of the upper expansion cavity is connected with the upper inner cavity, the lower expansion cavity is a conical cavity with the inner diameter gradually decreased from top to bottom, the large end of the lower expansion cavity is connected with the lower inner cavity, and the small end of the lower expansion cavity is connected with the lower sticky tube hole.

2. The contrast media filter according to claim 1, wherein the housing comprises an upper housing and a lower housing integrally fixed to each other, the upper housing has a bottom end surface, the lower housing has a top end surface, the bottom end surface and the top end surface are in butt joint, the edge portion of the filter membrane is fixed between the bottom end surface and the top end surface, the upper viscous tube hole, the upper expansion chamber, and the upper internal chamber are provided in the upper housing, the lower internal chamber, the lower expansion chamber, and the lower viscous tube hole are provided in the lower housing, the upper internal chamber is recessed in the bottom end surface, and the lower internal chamber is recessed in the top end surface.

3. The contrast media filter according to claim 2, wherein the small end of the upper extension chamber is connected to the upper visco-pore via an upper transition chamber, and the small end of the lower extension chamber is connected to the lower visco-pore via a lower transition chamber.

4. The contrast media filter according to claim 2, 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.

5. The contrast medium filter according to claim 2, wherein an annular first upper peripheral wall and an annular second upper peripheral wall are provided on a bottom end surface of the upper housing so as to protrude downward, the first upper peripheral wall surrounds the second upper peripheral wall, an annular lower fitting groove is provided on a top end surface of the lower housing so as to be recessed, the first upper peripheral wall covers an outer peripheral surface of the lower housing, and the second upper peripheral wall is fitted to the lower fitting groove by insertion.

6. The filter for contrast media according to claim 1, wherein said upper and lower visco-pore holes are cylindrical holes, and said upper and lower lumens are cylindrical cavities.

7. The contrast media filter according to claim 1, wherein the upper expansion chamber has a depth larger than that of the upper inner chamber, the upper inner chamber has an inner diameter larger than that of the upper expansion chamber, the lower expansion chamber has a depth larger than that of the lower inner chamber, and the lower inner chamber has an inner diameter larger than that of the lower expansion chamber.

8. The contrast media filter of claim 1, wherein the taper of the upper expansion chamber is equal to the taper of the lower expansion chamber.

9. The filter for contrast medium according to claim 1, wherein a plurality of upper fixing posts are provided in a row on the bottom of the upper inner chamber, a plurality of lower fixing posts are provided in a row on the bottom of the lower inner chamber, the upper and lower fixing posts are aligned one to one, and the upper and lower fixing posts which are aligned with each other abut against the filtering membrane at upper and lower sides, respectively.

10. The contrast media filter according to claim 9, 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.

Technical Field

The invention 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.

Disclosure of Invention

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

The invention provides a filter for a contrast medium, which comprises a filtering membrane and a shell with an axis, wherein the shell is provided with a liquid medicine channel which penetrates through the shell up and down along the axis, the liquid medicine channel comprises an upper sticky tube hole, an upper expansion cavity, an inner cavity, a lower expansion cavity and a lower sticky tube hole which are sequentially arranged along the axis, the filtering membrane is fixed in the inner cavity and divides the inner cavity into the upper inner cavity and the lower inner cavity, the upper expansion cavity is a conical cavity with the inner diameter gradually increased from top to bottom, the small end of the upper expansion cavity is connected with the upper sticky tube hole, the large end of the upper expansion cavity is connected with the upper inner cavity, the lower expansion cavity is a conical cavity with the inner diameter gradually decreased from top to bottom, the large end of the lower expansion cavity is connected with the lower inner cavity, and the small end of the lower expansion cavity is connected with the lower sticky tube hole.

The shell comprises an upper shell and a lower shell which are fixed into a whole, the upper shell is provided with a bottom end face, the lower shell is provided with a top end face, the bottom end face is in butt joint with the top end face, the edge part of the filtering membrane is fixed between the bottom end face and the top end face, the upper sticky tube hole, the upper expansion cavity and the upper inner cavity are arranged on the upper shell, the lower inner cavity, the lower expansion cavity and the lower sticky tube hole are arranged on the lower shell, the upper inner cavity is concavely arranged on the bottom end face, and the lower inner cavity is concavely arranged on the top end face. 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 end face of the bottom of the upper shell is provided with a first annular upper peripheral wall and a second annular upper peripheral wall in a downward protruding mode, the first upper peripheral wall surrounds the second upper peripheral wall, the end face of the top of the lower shell is provided with a lower annular matching groove in a concave mode, the outer peripheral face of the lower shell is sleeved with the first upper peripheral wall, and the second upper peripheral wall is matched with the lower matching groove in an inserting mode.

The upper bonding pipe hole and the lower bonding pipe hole are cylindrical holes, and the upper inner cavity and the lower inner 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 greater than that of the upper expansion cavity, the inner diameter of the upper expansion cavity is greater than that of the upper expansion cavity, the depth of the lower expansion cavity is greater than that of the lower expansion cavity, and the inner diameter of the lower expansion cavity is greater than that of the lower expansion cavity.

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 invention 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 invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.