Anticoagulation filter

Abstract

The utility model relates to an anticoagulation filter which comprises an air pipe plug and a connecting pipe, one end of the air pipe plug is used for being connected with an outlet of an injector, one end of the connecting pipe is used for being connected with a sample suction opening of a qi and blood analyzer, the air pipe plug comprises a central pipe and a connecting plug, and the lower end of the central pipe is used for being connected with the outlet of the injector. A cylindrical cavity with an upward opening is formed in the connecting plug, the upper end of the central pipe is arranged in the center of the cylindrical cavity of the connecting plug in a penetrating mode, the upper end of the central pipe is flush with the upper end of the connecting plug, and an annular inserting groove used for being connected with the connecting pipe in an inserted mode is formed between the outer wall of the central pipe and the inner wall of the cylindrical cavity; a filter screen is fixedly adhered to the upper end of the central pipe; according to the anti-coagulation filter, a split inserting structure is adopted, and splicing is convenient when the anti-coagulation filter is used; the filter screen is bonded and fixed at the upper end of the central pipe and is convenient to produce and process; the mesh number and the aperture of the filter screen can be selected according to needs, and clots can be reliably filtered.

Description

TECHNICAL FIELD

[0001] The utility model relates to blood gas analyzer accessory technology especially, one kind is anticoagulation filter. BACKGROUND

[0002] Blood gas analysis is to determine the related indexes such as pH, carbon dioxide partial pressure and oxygen partial pressure in blood, and is commonly used in medicine to determine whether the body exists acid-base imbalance and the inspection means of hypoxia and hypoxia degree. In blood gas analysis, the usual operation steps are that blood is collected by manually using a disposable syringe, an anticoagulant is pre-placed in the syringe, the blood collected in the syringe is mixed, and then the sampling needle of the blood gas analyzer is inserted into the syringe to automatically extract the blood. In the process of automatically extracting the blood by the sampling needle, although the blood in the syringe is added with the anticoagulant, blood clots may still occur, which easily leads to the blockage of the sampling needle, causing the interruption of analysis. Not only does it need to be re-sampled, reducing the analysis efficiency, but also the cost of reagents and maintenance after the blockage of the sampling needle is increased.

[0003] As disclosed in the Chinese patent document with the authorized announcement number CN209091397U, a filter device for blood gas analysis includes a conical tube section made of transparent material, and a funnel body made of transparent material arranged at the larger diameter end of the conical tube section. The hole diameter of the smaller diameter end of the conical tube section is matched with the discharge port of the syringe. A partition plate is arranged in the conical tube section close to the smaller diameter end thereof, and a plurality of filter holes for filtering blood clots are arranged on the partition plate. When in use, it is sleeved on the discharge port of the syringe, and the blood sample can be discharged into the conical tube section by directly pushing the syringe piston. Due to the filtering effect of the filter holes on the partition plate, the clots in the blood are completely filtered, and the blockage of the sampling needle basically does not occur, thereby reducing the maintenance cost of the blood gas analyzer. In this filter device, the filter holes are arranged on the partition plate, the processing difficulty of the filter holes is large, the consistency of the hole diameters of the filter holes is poor, burrs are easily generated on the edges of the filter holes, and the filtration is unreliable. SUMMARY

[0004] The utility model aims at providing an anticoagulation filter to solve the problem of unreliable filtration of the existing anticoagulation filter device for blood gas analyzers.

[0005] In order to solve the above problems, the utility model provides an anticoagulation filter, including tracheal plug and connecting pipe, one end of tracheal plug is used for connecting with syringe export, one end of connecting pipe is used for connecting with the sample suction port of gas blood analysis appearance, the tracheal plug includes center tube and plug connector, the lower end of center tube is used for connecting with syringe export, be equipped with the cylindrical cavity of opening upwards on plug connector, the center of cylindrical cavity of plug connector is worn the upper end of center tube, and the upper end of center tube is flush with the upper end of plug connector, the outer wall of center tube and the inner wall of cylindrical cavity form annular insertion slot for inserting connecting pipe, the upper end of center tube is adhesively fixed with filter screen.

[0006] The anticoagulation filter provided by the utility model further has the following technical features:

[0007] Further, the outer contour of the plug connector is in the shape of an oblong, and the long side of the plug connector forms a holding plane.

[0008] Further, the plug connector comprises a plug-in part and a tapered connecting part, the upper end of the plug-in part is flush with the upper end of the center tube, the lower end of the tapered connecting part is connected with the center tube, and the plug connector and the center tube are integrally injection molded.

[0009] Further, a silica gel sealing sleeve is further installed between the inner wall of the plug connector and the outer wall of the connecting pipe.

[0010] Further, the inner diameter of the lower end of the center tube is equal to the outer diameter of the nipple of the syringe, and the inner wall of the lower end of the center tube is provided with a taper matched with the nipple of the syringe.

[0011] Further, the outer wall of the upper end of the center tube is provided with a taper of 2° to 5°, and the inner wall of the lower end of the connecting pipe is provided with a taper matched with the upper end of the center tube.

[0012] The anticoagulation filter has the following advantages: the above-mentioned anticoagulation filter of the application adopts a split plug-in structure, which is convenient to splice during use; the filter screen is adhesively fixed at the upper end of the center tube, which is convenient for production and processing; the mesh number and aperture of the filter screen can be selected as required, the filter holes of the filter screen are uniform and have good aperture consistency, and the filter screen is reliable for filtering clots. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Fig. 1 is a structural schematic view of the anticoagulation filter of the utility model embodiment;

[0014] Figure 2 Fig. 2 is another perspective view of the anticoagulation filter in Fig. 1; Figure 1

[0015] Figure 3 Fig. 3 is a structural schematic view of the plug connector of the anticoagulation filter in Fig. 1;​Figure 1 a sectional view of the anticoagulation filter in the filter device;

[0016] Figure 4 It is a structure schematic view of the tracheal plug in the embodiment of the utility model. DETAILED DESCRIPTION

[0017] The utility model will be explained in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0018] As Figures 1 to 4 The embodiment of the anticoagulation filter of the utility model shows that the anticoagulation filter comprises a tracheal plug 10 and a connecting pipe 20, one end of the tracheal plug 10 is used for being connected with the outlet of a syringe, one end of the connecting pipe 20 is used for being connected with the sample suction port of a blood gas analyzer, the tracheal plug 10 comprises a central pipe 11 and a plug 12, the lower end of the central pipe 11 is used for being connected with the outlet of the syringe, the plug 12 is provided with a cylindrical cavity with an opening facing upwards, the upper end of the central pipe 11 is arranged at the center of the cylindrical cavity of the plug 12, and the upper end of the central pipe 11 is flush with the upper end of the plug 12, an annular insertion slot for inserting the connecting pipe 20 is formed between the outer wall of the central pipe 11 and the inner wall of the cylindrical cavity, the lower end of the connecting pipe 20 is inserted in the annular insertion slot, and the upper end of the central pipe 11 is inserted in the lower end of the connecting pipe 20; the upper end of the central pipe 11 is adhesively fixed with a filter screen 13.

[0019] The above-mentioned anticoagulation filter of the application is used for connecting the upper end of the connecting pipe 20 with the sample suction port of the blood gas analyzer, the lower end of the central pipe 11 is connected with the nipple of the syringe, when the blood sample flows from the syringe to the blood gas analyzer, the filter screen can effectively filter and intercept the blood clots, prevent the blood clots from entering the detection channel of the blood gas analyzer through physical isolation, and effectively reduce the detection failure caused by the clots.

[0020] The above-mentioned anticoagulation filter of the application adopts a split insertion structure, is convenient to splice when used, the filter screen is adhesively fixed on the upper end of the central pipe, is convenient to produce and process, the mesh number and aperture of the filter screen can be selected according to needs, the filter holes of the filter screen are uniform and have good aperture consistency, and the filter screen is reliable for clot filtration.

[0021] In an embodiment of the present application, preferably, the outer contour of the plug-in head 12 is in the shape of an oblong, and the long side of the plug-in head 12 is formed with a holding plane 123. The oblong outer contour not only facilitates holding, but also effectively prevents the plug-in head from slipping off due to misoperation during plugging and unplugging. The oblong outer contour also provides more stable support when the plug-in head is connected to the nipple of the syringe, reduces the loosening of the connection caused by external force, and thus ensures that the anticoagulation filter always maintains a reliable connection state during use, thereby improving the overall reliability and practicability of the anticoagulation filter.

[0022] In an embodiment of the present application, preferably, the plug-in head 12 comprises a plug-in part 121 and a tapered connecting part 122. The upper end of the plug-in part 121 is flush with the upper end of the central tube 11, and the lower end of the tapered connecting part 122 is connected to the central tube 11. The plug-in head 12 is integrally injection molded with the central tube 11, so that the tracheal plug 10 is compact, simple in structure, easy to process, and reliable in structure.

[0023] In an embodiment of the present application, preferably, a silica gel sealing sleeve 14 is further installed between the inner wall of the plug-in head 12 and the outer wall of the connecting tube 20, so that the connection between the connecting tube 20 and the tracheal plug 10 is sealed reliably. Specifically, after the connecting tube 20 is fixedly plugged with the tracheal plug 10, the inner wall of the connecting tube 20 and the outer wall of the central tube 11 form a first annular seal, and the silica gel sealing sleeve 14 forms a second annular seal between the inner wall of the connecting tube 20 and the inner wall of the plug-in head 12, so that the connection is sealed reliably.

[0024] In an embodiment of the present application, preferably, the inner diameter of the lower end of the central tube 11 is equal to the outer diameter of the nipple of the syringe, and the inner wall of the lower end of the central tube 11 is provided with a taper that is adapted to the nipple of the syringe, so that the lower end of the central tube 11 is conveniently connected to the nipple of the syringe, and the connection is sealed reliably.

[0025] In an embodiment of the present application, preferably, the outer wall of the upper end of the central tube 11 is provided with a taper of 2° to 5°, and the inner wall of the lower end of the connecting tube 20 is provided with a taper that is adapted to the upper end of the central tube 11, so that the connecting tube 20 is conveniently connected to the central tube 11, and the inner wall of the connecting tube 20 and the outer wall of the central tube 11 can form a first annular seal, so that the connection is sealed reliably.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features. Such modifications or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An anticoagulant filter, comprising an endotracheal plug and a connecting tube, one end of the endotracheal plug being connected to a syringe outlet, and one end of the connecting tube being connected to a sample suction port of a blood gas analyzer, characterized in that, The endotracheal plug includes a central tube and a connector. The lower end of the central tube is used to connect to the syringe outlet. The connector has an upward-facing cylindrical cavity. The upper end of the central tube passes through the center of the cylindrical cavity of the connector, and the upper end of the central tube is flush with the upper end of the connector. An annular slot for inserting the connecting tube is formed between the outer wall of the central tube and the inner wall of the cylindrical cavity. A filter screen is glued and fixed to the upper end of the central tube.

2. The anti-coagulation filter according to claim 1, characterized in that: The outer contour of the connector is oblong, and the long side of the connector forms a gripping plane.

3. The anti-coagulation filter according to claim 1, characterized in that: The connector includes a plug-in portion and a tapered connecting portion. The upper end of the plug-in portion is flush with the upper end of the central tube, and the lower end of the tapered connecting portion is connected to the central tube. The connector and the central tube are integrally injection molded.

4. The anti-coagulation filter according to claim 1, characterized in that: A silicone sealing sleeve is also installed between the inner wall of the connector and the outer wall of the connecting pipe.

5. The anti-coagulation filter according to claim 1, characterized in that: The inner diameter of the lower end of the central tube is equal to the outer diameter of the syringe nipple, and the inner wall of the lower end of the central tube is provided with a taper that matches the syringe nipple.

6. The anti-coagulation filter according to claim 1, characterized in that: The outer wall of the upper end of the central tube has a taper of 2° to 5°, and the inner wall of the lower end of the connecting tube has a taper that matches the upper end of the central tube.

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