Multifunctional sampling needle

Abstract

The utility model relates to the technical field of medical instruments, in particular to a multifunctional sampling needle which comprises a fixed seat and a sampling assembly, the fixed seat is connected with the circuit board through a cable, the sampling assembly comprises a sampling pipe and a gas path pipe, the sampling pipe is fixedly connected with the fixed seat, penetrates through the fixed seat and the gas path pipe to be fixedly connected with the fixed seat and penetrates through the fixed seat, and the sampling pipe and the gas path pipe are arranged in the fixed seat in parallel. The uniform mixing effect is poor; and the accuracy of a detection result is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a multifunctional sampling needle. Background Art

[0002] Urinalysis is one of the three most common clinical testing procedures in modern medicine. Urine samples contain a wide range of information related to a person's health status, such as red blood cell (RBC) and white blood cell (WBC) counts, crystals, bacteria, and casts. Therefore, high-quality delivery of urine samples, reflecting the patient's health status, to the instrument's relevant testing modules is crucial. The sampling needle, which interacts with and collects the urine sample at the instrument end, is crucial. The no-opening, puncture-based testing method protects healthcare workers from aerosol-induced infection, complying with the safety requirements of the "Fourth Round of Graded Hospital Standards." To minimize direct contact between testing personnel and the sample, and to avoid direct infection with pathogenic bacteria (such as syphilis and tuberculosis) and parasites (such as Trichomonas and filariasis) in urine, the sampling needle must possess puncture sampling capabilities. Furthermore, due to the time required to collect the sample, place it in the instrument, and aspirate it for testing, the formed elements in the sample can settle to the bottom of the sample tube during this process. Therefore, proper mixing of the sample before aspiration is crucial.

[0003] Currently, in the field of urine formed component analyzers, the sampling needles of all analytical devices on the market mostly adopt a single-needle structure. That is, the sampling needle of the single-needle structure performs both sampling and mixing functions. The mixing method is to absorb a certain amount of sample, then spit it out, and repeat the entire mixing action several times in the sample tube. This mixing method inevitably makes the inner diameter of the sampling needle relatively large, the sampling accuracy is not high, the sample loss is relatively large, and the sample is easily diluted by the cleaning fluid in the sampling needle, affecting the repeatability and accuracy of the test results. In order to ensure the test results, designing a small-aperture sampling needle will lead to a reduction in flow rate, which will lead to incomplete sample mixing, resulting in poor mixing effect and affecting the accuracy of the test results.

[0004] Aiming at the shortcomings of sample sampling needles used in existing urine instruments, a multifunctional sampling needle is provided which can effectively puncture a sample tube with a punctureable cover and effectively mix the sample. Utility Model Content

[0005] The purpose of the utility model is to provide a multifunctional sampling needle, which solves the problem that the mixing of test samples is incomplete, resulting in poor mixing effect and affecting the accuracy of test results.

[0006] To achieve the above object, the present utility model provides a multi-functional sampling needle, which includes a fixed seat and a sampling assembly; the fixed seat is connected to a circuit board through a cable, the sampling assembly includes a sampling tube and a gas path tube, the sampling tube is fixedly connected to the fixed seat and passes through the fixed seat, the gas path tube is fixedly connected to the fixed seat and passes through the fixed seat, and the sampling tube and the gas path tube are placed in parallel inside the fixed seat.

[0007] Wherein, the multi-functional sampling needle further includes a reinforcing sleeve, the reinforcing sleeve is fixedly connected to the fixed seat and is located outside the sampling tube and the gas path tube.

[0008] Wherein, the gas path tube is fixedly arranged side by side with the sampling tube, and its cross-section is in the shape of "∞". The gap between the two tubes serves as an exhaust groove during puncture. The tip of the multi-functional sampling needle is obliquely cut, and the oblique cutting angle is 45°.

[0009] Wherein, the inner diameter of the reinforcing sleeve is equal to the sum of the two diameters after the gas path tube and the sampling tube are arranged side by side.

[0010] Wherein, the surfaces of the sampling tube and the gas path tube are provided with an insulating and hydrophobic coating.

[0011] For the multi-functional sampling needle of the present utility model, the fixed seat provides a supporting function for the sampling tube and the gas path tube. The inner diameter of the sampling tube is 0.8 mm. The gas path tube is made of the same material and has the same inner diameter. At the upper part of the sampling needle, the gas path tube has a certain arc double bend, so that the gas path tube and the sampling tube are spaced apart to facilitate the sleeving. The sampling tube and the gas path tube designed with a double-row needle tube do not interfere with each other, which is beneficial to the sampling accuracy. The double-row tubes are connected side by side to naturally form a puncture exhaust groove, which is beneficial to the puncture of the sampling needle. The air outlet hole of the gas path tube at the tip of the needle is very close to the sampling needle hole. When the sampling needle reaches the bottom, the mixed gas blown out from the air outlet hole of the gas path tube can effectively stir the sample at the bottom of the test tube. The sample mixing effect is good, which is beneficial to the repeatability and accuracy of the detection result, and solves the problem that the detection sample is not completely mixed, resulting in poor mixing effect and affecting the accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0013] Figure 1 It is a schematic diagram of the overall structure of a multi-functional sampling needle according to the first embodiment of the present utility model.

[0014] Figure 2 It is a schematic diagram of the structure of the sampling tube and the gas path tube according to the first embodiment of the present utility model.

[0015] Figure 3 is the Figure 2 AD position cross-sectional schematic diagram of the present utility model.

[0016] Figure 4 is the structural schematic diagram of the insulating hydrophobic coating of the second embodiment of the present utility model.

[0017] In the figure: 100 - needle, 101 - fixed seat, 102 - sampling tube, 103 - gas path tube, 104 - reinforcing sleeve, 201 - insulating hydrophobic coating. Specific embodiments

[0018] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0019] The first embodiment of the present application is as follows:

[0020] Please refer to Figures 1 to 3 , wherein, Figure 1 is the overall structural schematic diagram of a multi-functional sampling needle of the first embodiment of the present utility model, Figure 2 is the structural schematic diagram of the sampling tube and the gas path tube of the first embodiment of the present utility model, Figure 3 is the Figure 2 AD position cross-sectional schematic diagram of the present utility model. The present utility model provides a multi-functional sampling needle, including a fixed seat 101, a reinforcing sleeve 104 and a sampling assembly. The sampling assembly includes a sampling tube 102 and a gas path tube 103; the problem that the detection sample is not completely mixed, resulting in poor mixing effect and affecting the accuracy of the detection result is solved by the foregoing solution.

[0021] For this specific embodiment, the fixed seat 101 is connected to the circuit board through a cable. The sampling tube 102 is fixedly connected to the fixed seat 101 and passes through the fixed seat 101. The gas path tube 103 is fixedly connected to the fixed seat 101 and passes through the fixed seat 101. The sampling tube 102 and the gas path tube 103 are placed in parallel inside the fixed seat 101. The fixed seat 101 provides a supporting function for the sampling tube 102 and the gas path tube 103. The inner diameter of the sampling tube 102 is 0.8 mm. The gas path tube 103 is a tube of the same material and aperture. There is a certain arc double bend in the gas path tube 103 above the sampling needle, so that the gas path tube 103 is separated from the sampling tube 102 for convenient sleeving. The sampling tube 102 and the gas path tube 103 designed with double-row needle tubes do not interfere with each other, which is beneficial to the sampling accuracy. The double-row tubes are connected side by side to naturally form a puncture exhaust groove, which is beneficial to the puncture of the sampling needle. The air outlet hole of the gas path tube 103 at the needle head 100 is very close to the sampling needle hole. When the sampling needle probes to the bottom, the mixed gas blown out by the air outlet hole of the gas path tube 103 can effectively stir the sample at the bottom of the test tube. The good mixing effect of the sample is beneficial to the repeatability and accuracy of the detection results.

[0022] Among them, the reinforcing sleeve 104 is fixedly connected to the fixed seat 101 and is located outside the sampling tube 102 and the gas path tube 103. Since the diameters of the sampling tube 102 and the gas path tube 103 are small, the reinforcing sleeve 104 provides an effect of wrapping and fixing for the sampling tube 102 and the gas path tube 103.

[0023] Secondly, the gas path tube 103 and the sampling tube 102 are arranged side by side and closely attached, and are fixed by laser welding. Its cross-section forms an "∞" shape. The gap between the two tubes serves as an exhaust groove during puncture. The needle head 100 of the multi-functional sampling needle is obliquely cut, and the oblique cutting angle is 45°. The "∞" - shaped gap between the two tubes serves as an exhaust groove during puncture, which is more beneficial for the sampling tube 102 and the gas path tube 103 to pierce the sealing film of the sample test tube during puncture. At the same time, it is beneficial for exhausting gas when the gas path tube 103 is inflated and mixed. The needle head 100 with an oblique cutting angle of 45° greatly reduces the requirement for puncture power and is easy to achieve the puncture of the sample test tube film.

[0024] Thirdly, the inner diameter of the reinforcing sleeve 104 is equal to the sum of the two diameters after the gas path tube 103 and the sampling tube 102 are arranged side by side. After the reinforcing tube is sleeved, the inner diameter is tangent to the outer walls of the gas path tube 103 and the sampling tube 102. During encapsulation, the internal voids are filled with glue, and a natural transition with a certain length slope is formed between the outside and the double exhaust gas path tube 103 and the sampling tube 102. Through the natural transition, it is convenient to fix and wrap the sampling tube 102 and the gas path tube 103.

[0025] Using a multifunctional sampling needle of this embodiment, the fixed seat 101 provides support for the sampling tube 102 and the gas path tube 103. The inner diameter of the sampling tube 102 is 0.8 mm. The gas path tube 103 is a tube of the same material and aperture. At the upper part of the sampling needle, the gas path tube 103 has a certain arc double bend, so that the gas path tube 103 is separated from the sampling tube 102 for convenient sleeving. The sampling tube 102 and the gas path tube 103 designed with a double-row needle tube do not interfere with each other, which is beneficial to the sampling accuracy. The double-row tubes are connected side by side to naturally form a puncture exhaust groove, which is beneficial to the puncture of the sampling needle. The air outlet hole of the gas path tube 103 at the needle head 100 is very close to the sampling needle hole. When the sampling needle reaches the bottom, the mixing gas blown out from the air outlet hole of the gas path tube 103 can effectively stir the sample at the bottom of the test tube. The good sample mixing effect is beneficial to the repeatability and accuracy of the detection results, solving the problem of incomplete mixing of the detected sample, resulting in poor mixing effect and affecting the accuracy of the detection results.

[0026] The second embodiment of this application is as follows:

[0027] On the basis of the first embodiment, please refer to Figure 4 , in which, Figure 4 is a schematic structural diagram of the insulating and hydrophobic coating of the second embodiment of the present utility model.

[0028] For this specific embodiment, the surfaces of the sampling tube 102 and the gas path tube 103 are provided with an insulating and hydrophobic coating. The outer wall part of the multifunctional sampling needle is polished. Except for a 5-mm length starting from the needle head 100, the other outer walls are coated with an insulating and hydrophobic coating 201 on the surface. The insulating and hydrophobic coating 201 avoids the adhesion of the sampling needle to the liquid when inserted into the test tube, increasing the stability of the detection.

[0029] Using a multifunctional sampling needle of this embodiment, the insulating and hydrophobic coating 201 avoids the adhesion of the sampling needle to the liquid when inserted into the test tube, increasing the stability of the detection.

[0030] The above-disclosed are only one or more preferred embodiments of this application, and the scope of rights of this application cannot be limited by this. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of this application still fall within the scope covered by this application.

Claims

1. A multifunctional sampling needle, characterized in that it includes a fixed seat and a sampling assembly; The fixed seat is connected to a circuit board through a cable. The sampling assembly includes a sampling tube and a gas path tube. The sampling tube is fixedly connected to the fixed seat and passes through the fixed seat. The gas path tube is fixedly connected to the fixed seat and passes through the fixed seat. The sampling tube and the gas path tube are placed in parallel inside the fixed seat.

2. The multifunctional sampling needle according to claim 1, characterized in that the multifunctional sampling needle further includes a reinforcing sleeve, and the reinforcing sleeve is fixedly connected to the fixed seat and is located outside the sampling tube and the gas path tube.

3. The multifunctional sampling needle according to claim 2, characterized in that the gas path tube is fixedly arranged side by side with the sampling tube, and its cross-section is in the shape of "∞". The gap between the two tubes serves as an exhaust groove during puncture. The tip of the multifunctional sampling needle is beveled, and the bevel angle is 45°.

4. The multifunctional sampling needle according to claim 3, characterized in that the inner diameter of the reinforcing sleeve is equal to the sum of the two diameters after the gas path tube and the sampling tube are arranged side by side.

5. The multifunctional sampling needle according to claim 1, characterized in that the surfaces of the sampling tube and the gas path tube are provided with an insulating and hydrophobic coating.

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