Sample introduction assembly and capillary adapter

Abstract

The utility model provides a sample injection assembly and a capillary adapter. A sample injection needle assembly is provided with a sample injection needle body and a sample injection needle extending out of the head end of the sample injection needle body. The capillary adapter is provided with a first end, a second end and a through hole penetrating through the first end and the second end, the end face of the first end is provided with a butt-joint groove matched with the sample injection needle end, and the through hole is at least used for clamping a capillary at the end close to the bottom of the butt-joint groove. According to the mode, when the capillary adapter is in butt joint with the sample injection needle assembly, butt joint of the capillary tube and the sample injection needle assembly is achieved, pressure borne by the capillary tube is reduced so that the capillary tube can be prevented from being broken, and after the capillary adapter is in butt joint with the sample injection needle, contact between a sample and air can be isolated when the sample injection needle sucks the sample in the capillary tube; therefore, the quality of a sample extracted by the sample injection needle is improved, and the measurement accuracy is further improved.

Description

Technical Field

[0001] The disclosed embodiments of the present application relate to the field of detection technology, and more particularly, to a sampling assembly and a capillary adapter. Background Art

[0002] In clinical practice, using a capillary pipette to collect blood for blood gas analysis has strict operating requirements. The blood needs to fill the entire capillary pipette, and there must be no bubbles or clots in the middle. If there are bubbles or clots, it needs to be collected again. After the collection is completed, the capillary should be placed horizontally and tested immediately. If there are caps on both ends of the capillary, after blood is collected, both ends of the capillary need to be closed to prevent blood from contacting with air, thereby interfering with the measurement.

[0003] When the medical testing equipment is injecting samples, the injection needle of the sampling component enters the capillary to absorb the sample. However, during the docking process between the handheld capillary and the injection needle assembly of the instrument, docking pressure needs to be applied to ensure the airtightness of the connection between the capillary and the injection needle to reduce the extraction of air by the injection needle. However, during the docking process, the capillary is easily broken. Utility Model Content

[0004] According to the embodiments of the present application, the present application proposes a sampling assembly and a capillary adapter to solve the above-mentioned problems.

[0005] The present application provides a capillary adapter for use in medical testing equipment, the capillary adapter comprising a first end and a second end and a through hole penetrating the first end and the second end, the end surface of the first end having a docking groove adapted to fit an injection needle, and the through hole is used to clamp the capillary at least at one end adjacent to the bottom of the docking groove.

[0006] In some embodiments, the through hole has a clamping section and a guide section, the clamping section has a radial dimension smaller than the outer diameter of the capillary and is located at one end of the through hole adjacent to the bottom of the docking groove, and the guide section has a radial dimension larger than the outer diameter of the capillary and is located at one end of the through hole away from the bottom of the docking groove.

[0007] In some embodiments, the bottom of the docking groove has a convex portion, and the first end of the through hole passes through the convex portion.

[0008] In some embodiments, the protrusion is cone-shaped.

[0009] In some embodiments, the inner wall of the guide section gradually moves away from the central axis of the capillary adapter from the clamping section toward the direction away from the docking groove, forming a first guide slope with a gradually increasing inner diameter of the through hole.

[0010] In some embodiments, the inner wall of the guide section gradually approaches the central axis of the capillary adapter from the second end of the capillary adapter toward the docking groove, forming a second guide slope with a gradually decreasing inner diameter of the through hole.

[0011] According to an injection assembly provided in the present application, the assembly includes: an injection needle assembly, having an injection needle body and an injection needle extending from the head end of the injection needle body; a capillary adapter, having a first end and a second end and a through hole passing through the first end and the second end, the end surface of the first end having a docking groove adapted to fit the injection needle, and the through hole is used to clamp the capillary at least at one end adjacent to the bottom of the docking groove.

[0012] In some embodiments, the side wall of the docking groove has a first section, a second section and a third section in the axial direction of the capillary adapter, the first section and the third section are parallel to the central axis of the capillary adapter, the second section connects the first section and the third section, and the first section is closer to the bottom of the docking groove and the central axis of the capillary adapter than the third section; the outer wall of the head end of the injection needle body has a first surface, a second surface and a third surface in the axial direction, at least a portion of the first surface abuts against the first section of the docking groove, at least a portion of the second surface abuts against the second section of the docking groove, at least a portion of the third surface abuts against the third section of the docking groove, the first surface and the third surface are parallel, and the second surface connects the first surface and the third surface.

[0013] The beneficial effects of the present application are as follows: the capillary adapter has a first end and a second end and a through hole penetrating the first end and the second end, the first end surface has a docking groove adapted to the injection needle end, the capillary adapter can be tightly docked with the injection needle body, so that the injection needle does not extract air when extracting the sample in the capillary, thereby improving the quality of the sample entering the medical detection device. In addition, the through hole of the capillary adapter is used to clamp the capillary at least at one end adjacent to the bottom of the docking groove, so that the capillary and the injection needle assembly can be docked by holding the capillary adapter, and the pressure on the capillary when the capillary and the injection needle assembly are docked is transferred to the capillary adapter, thereby reducing the pressure on the capillary and avoiding the rupture of the capillary, which can both preserve the sample and achieve safety protection for the detection personnel.

[0014] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application will be further described below in conjunction with the accompanying drawings and implementation methods, in which:

[0016] Figure 1is a schematic cross-sectional diagram of the sample injection assembly assembly of an embodiment of the present application;

[0017] Figure 2 is a schematic structural diagram of a capillary adapter described in an embodiment of the capillary adapter of the present application;

[0018] Figure 3 is a cross-sectional schematic diagram of a capillary adapter and a capillary in an embodiment of a capillary adapter of the present application;

[0019] Figure 4 It is a cross-sectional schematic diagram of a capillary pipette adapter according to an embodiment of the capillary adapter of the present application. DETAILED DESCRIPTION

[0020] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of, for example, including at least one of A, B, and C, and can mean including any one or more elements selected from the set consisting of A, B, and C. In addition, the terms "first", "second", and "third" in this application are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

[0022] In clinical practice, using capillaries to collect blood for blood gas analysis has strict operating requirements. The blood needs to fill the entire capillary pipette, and there must be no bubbles or clots in the middle. If there are bubbles or clots, it needs to be re-collected. After the collection is completed, the capillary should be placed horizontally and tested immediately. If there are caps on both ends of the capillary, after blood is collected, both ends of the capillary need to be closed to prevent blood from contacting with air, thereby interfering with the measurement.

[0023] After long-term research, the applicant has found that when the medical detection equipment is injecting samples, the injection needle of the sampling assembly enters the capillary to absorb the sample so that the medical detection equipment can detect the sample. In the process of docking the handheld capillary with the injection needle assembly of the instrument or using other tools to clamp the capillary to dock the capillary with the injection needle assembly, it is necessary to apply a certain external force to dock the capillary with the injection needle assembly to ensure the airtightness of the docking between the capillary and the injection needle assembly, thereby reducing the extraction of air by the injection needle during injection. However, when a certain external force is used for docking, the capillary may be broken due to the external force or the force between the capillary and the injection needle assembly, which has an adverse effect on the sample and may pose a safety hazard to the detection personnel. Therefore, in order to solve the above technical problems, the present application proposes at least the following embodiments.

[0024] See also Figures 1 to 3 The injection assembly described in the embodiment of the injection assembly of the present application includes an injection needle assembly 3 and a capillary adapter 1. The injection needle assembly 3 includes an injection needle body 32 and an injection needle 31 extending from the head end of the injection needle body 32. The capillary adapter 1 has a first end and a second end and a through hole 30 penetrating the first end and the second end. In this way, the capillary 2 and the injection needle 31 can be connected through the through hole 30 of the capillary adapter 1, so that the injection needle 31 can take the sample in the capillary 2. In order to enable the capillary adapter 1 to dock with the injection assembly, the first end face of the capillary adapter 1 has a docking groove 40 adapted to the head end of the injection needle 31. The through hole 30 is used to clamp the capillary 2 at least at one end adjacent to the bottom of the docking groove 40. Since the end of the through hole 30 adjacent to the bottom of the docking groove 40 is used to clamp the capillary 2, the injection needle 31 can extract the sample in the capillary 2 when the distance extended from the head end of the injection needle 31 is short. In this way, when the capillary adapter 1 is not completely face-to-face with the injection assembly, that is, when the central axis of the extended injection needle 31 is at a certain angle to the central axis of the capillary 2, the injection needle 31 extended from the head end of the injection needle body 32 can avoid the situation where the head of the injection needle 31 contacts the inner wall of the capillary 2 due to the shorter extension distance, thereby applying pressure to the capillary 2 and causing damage to the capillary 2.

[0025] When the capillary adapter 1 is used to dock the capillary 2 with the injection assembly, the capillary 2 can be first inserted into the capillary adapter 1, and then the capillary adapter 1 can be held to dock the capillary adapter 1 with the injection assembly to achieve docking of the injection assembly with the capillary 2, so that the injection needle 31 can take the sample in the capillary 2. Of course, in some embodiments, after the capillary adapter 1 is docked with the injection assembly, when replacing a new capillary 2, the previous capillary 2 can be directly pulled out and then the new capillary 2 can be inserted into the capillary adapter 1 without separating the capillary adapter 1 from the injection assembly.

[0026] In some embodiments, the capillary adapter 1 may be made of a material with high sealing performance and elasticity, for example, the capillary adapter 1 may be made of silicone. Since the capillary adapter 1 is elastic, the pressure of external force on the capillary 2 can be reduced when the capillary adapter 1 is held for docking, thereby extending the service life of the capillary 2 and preventing the capillary 2 from breaking.

[0027] In some embodiments, the capillary adapter 1 may be transparent. When the capillary 2 is inserted into the capillary adapter 1 from the second end of the through hole 30 , the insertion depth of the capillary 2 can be observed through the transparent capillary adapter 1 to determine the position at which the end of the capillary 2 near the docking groove 40 reaches the clamping section 10 .

[0028] like Figure 4 As shown, the through hole 30 has a clamping section 10. The clamping section 10 is used to fix the capillary 2 when the capillary 2 is inserted into the capillary adapter 1. The radial dimension of the clamping section 10 is smaller than the outer diameter of the capillary 2 and is located at one end of the through hole 30 adjacent to the bottom of the docking groove 40. The material of the capillary adapter 1 has slight elasticity, so when the capillary 2 is inserted into the clamping section 10 of the through hole 30, the inner wall of the capillary adapter 1 at the clamping section 10 is squeezed by the capillary 2 and slightly deformed, so that the clamping section 10 and the capillary 2 are interference fit, and then after the capillary 2 is inserted into the capillary adapter 1 and docked with the injection assembly, a closed channel is formed between the capillary 2, the capillary adapter 1 and the injection assembly, so that the injection needle 31 reduces the extraction of air when taking the sample in the capillary 2.

[0029] Optionally, the clamping section 10 has a certain length, so that when the test personnel insert the capillary 2 into the capillary adapter 1, when the capillary 2 reaches the clamping section 10, the test personnel may feel that the resistance to continue inserting the capillary 2 becomes larger because the radial dimension of the clamping section 10 is smaller than the outer diameter of the capillary 2, thereby reminding the test personnel to reduce the force. In addition, since the clamping section 10 has a certain length, the probability of the head end of the capillary 2 passing through the through hole 30 of the capillary adapter 1 can also be reduced, thereby preventing the capillary 2 from being subjected to the force of the injection component during docking.

[0030] Please refer again Figure 4In order to facilitate the insertion of the capillary 2 into the capillary adapter 1, the through hole 30 also has a guide section 20. The radial dimension of the guide section 20 of the through hole 30 is larger than the outer diameter of the capillary 2, and is located at the end of the through hole 30 away from the bottom of the docking groove 40. The clamping section 10 of the through hole 30 is connected to the guide section 20. That is, when the capillary 2 is inserted into the capillary adapter 1, the capillary 2 first passes through the guide section 20, and then is tightly connected to the capillary adapter 1 at the clamping section 10. The radial dimension of the guide section 20 is larger than the outer diameter of the capillary 2, which can facilitate the capillary 2 to pass through the guide section 20 and reach the clamping section 10.

[0031] Optionally, the inner wall of the guide section 20 gradually moves away from the central axis of the capillary adapter 1 from the clamping section 10 in a direction away from the docking groove 40, forming a first guide slope 21 with a gradually increasing inner diameter of the through hole 30. Since the radial dimension of the clamping section 10 is smaller than the outer diameter of the capillary 2, directly inserting the capillary 2 into the smaller hole section may generate a larger squeezing force on the capillary 2, so the first guide slope 21 can be used to guide the capillary 2 to be inserted into the clamping section 10 with a smaller radial dimension.

[0032] Optionally, the inner wall of the guide section 20 gradually approaches the central axis of the capillary adapter 1 from the second end of the capillary adapter 1 toward the direction close to the docking groove 40, forming a second guide slope 23 with a gradually decreasing inner diameter of the through hole 30. By providing the second guide slope 23, it is easy to insert the capillary 2 into the capillary adapter 1, and the capillary 2 can be guided to be inserted into the clamping section 10.

[0033] In addition, by providing the first guide bevel 21 and the second guide bevel 23, a limiting section 22 having a radial dimension greater than but close to the outer diameter of the capillary 2 can be provided between the first guide bevel 21 and the second guide bevel 23, so as to limit the capillary 2 after the capillary 2 is inserted into the capillary adapter 1, reduce the swing of the capillary 2 after the capillary 2 is inserted into the capillary adapter 1, and thus protect the capillary 2. Optionally, the length of the guide section 20 can be greater than the length of the first guide bevel 21 and the second guide bevel 23. The length of the first guide bevel 21 can be shorter so that the radial dimension of the guide section 20 connected to the first guide bevel 21 is not too large.

[0034] Optionally, the length of the first guide slope 21 may be smaller than the length of the second guide slope 23 .

[0035] Optionally, the bottom of the docking groove 40 has a convex portion 41, the first end of the through hole 30 penetrates the convex portion 41, and the convex portion 41 matches the concave surface of the head end of the injection needle body 32. By providing the convex portion 41 at the bottom of the docking groove 40 of the capillary adapter 1, and the convex portion 41 matches the concave surface of the head end of the injection needle body 32, it is convenient to dock the capillary 2 with the injection assembly and improve the tightness of the docking between the capillary adapter 1 and the injection assembly. And the first end of the through hole 30 penetrates the convex portion 41, so when the capillary 2 is inserted into the clamping section 10 of the capillary adapter 1, a closed channel is formed between the capillary adapter 1, the capillary 2 and the injection assembly, thereby improving the air tightness of the injection needle 31 when extracting the sample in the capillary 2.

[0036] Optionally, the protrusion 41 has a cone shape.

[0037] Optionally, in order to allow the injection assembly to be tightly docked with the capillary adapter 1, the side wall of the docking groove 40 may be segmented in the axial direction of the capillary adapter 1. Figure 4 As shown, the side wall of the docking groove 40 has a first section 42, a second section 43 and a third section 44 in the axial direction of the capillary adapter 1, the first section 42 and the third section 44 are parallel to the central axis of the capillary adapter 1, the second section 43 connects the first section 42 and the third section 44, and the first section 42 is closer to the bottom of the docking groove 40 and the central axis of the capillary adapter 1 than the third section 44. By providing the side wall of the docking groove 40 with the first section 42, the second section 43 and the third section 44 in the axial direction of the capillary adapter 1, and the first section 42 is closer to the bottom of the docking groove 40 and the central axis of the capillary adapter 1 than the third section 44, it is convenient for the head end of the injection assembly to enter the docking groove 40 through the first section 42 with a larger radial dimension of the side wall of the docking groove 40, and to be closely docked with the docking groove 40 through the third section 44 with a smaller radial dimension, so as to facilitate the docking of the injection assembly with the capillary adapter 1.

[0038] Correspondingly, in order to closely dock the injection assembly with the capillary adapter 1, corresponding arrangements may also be made on the outer wall of the head end of the injection needle body 32. Specifically, the outer wall of the head end of the injection needle body 32 has a first surface 35, a second surface 34 and a third surface 33 in the axial direction, at least a portion of the first surface 35 abuts against the first section 42 of the docking groove 40, at least a portion of the second surface 34 abuts against the second section 43 of the docking groove 40, at least a portion of the third surface 33 abuts against the third section 44 of the docking groove 40, the first surface 35 is parallel to the third surface 33, and the second surface 34 connects the first surface 35 and the third surface 33. In this way, the tip end of the injection needle body 32 matches the docking groove 40 of the capillary adapter 1 and is tightly docked, so that a closed channel is formed between the capillary adapter 1 and the injection assembly after docking, so that the injection needle 31 does not absorb air when extending to absorb the sample in the capillary 2, and no bubbles are generated in the absorbed sample, thereby improving the accuracy of the detection and further improving the quality of the medical detection equipment.

[0039] Optionally, the second surface 34 may be composed of a plurality of surfaces.

[0040] like Figure 2 and Figure 3 As shown, the capillary adapter 1 described in the embodiment of the capillary adapter applied to medical detection equipment of the present application includes a first end and a second end and a through hole 30 penetrating the first end and the second end, and the end face of the first end has a docking groove 40 adapted to the head of the injection needle 31, and the through hole 30 is used to clamp the capillary 2 at least at one end adjacent to the bottom of the docking groove 40.

[0041] For details of the capillary adapter 1 described in the capillary adapter embodiment of the present application applied to medical detection equipment, reference may be made to the relevant description of the capillary adapter 1 in the injection assembly described in the above injection assembly embodiment, which will not be repeated here.

[0042] In summary, the present application sets a first end and a second end and a through hole penetrating the first end and the second end in the capillary adapter, and the end face of the first end has a docking groove adapted to the injection needle end, so that the capillary adapter can be tightly docked with the injection needle body through the docking groove, so that the injection needle does not extract air in the process of extracting the sample in the capillary, and there are no bubbles in the sample sucked by the injection needle, thereby improving the quality of the sample entering the medical detection device, and further improving the detection accuracy of the sample by the medical detection device. In addition, the through hole of the capillary adapter is used to clamp the capillary at least at one end adjacent to the bottom of the docking groove, so that the capillary and the injection needle assembly can be docked by holding the capillary adapter without operating the capillary, and the pressure originally borne by the capillary when the capillary and the injection needle assembly are docked is transferred to the capillary adapter, thereby reducing the pressure borne by the capillary and avoiding the rupture of the capillary, which can not only preserve the sample but also realize the safety protection of the detection personnel, and block the risk of the sample infecting the personnel.

[0043] It is easy for a person skilled in the art to know that many modifications and changes can be made to the device and method while maintaining the teaching content of the present application. Therefore, the above disclosure should be considered as limited only by the scope of the attached claims.

Claims

1. A capillary adapter for medical testing equipment, characterized in that: include: A first end and a second end and a through hole running through the first end and the second end, the first end end surface has a docking groove adapted to fit the injection needle, and the through hole is used to clamp the capillary at least at one end adjacent to the bottom of the docking groove; the through hole has a clamping section, and the radial dimension of the clamping section is smaller than the outer diameter of the capillary.

2. The capillary adapter according to claim 1, characterized in that The clamping section is located at one end of the through hole adjacent to the bottom of the docking groove. The through hole has a guide section whose radial dimension is larger than the outer diameter of the capillary and is located at one end of the through hole away from the bottom of the docking groove.

3. The capillary adapter according to claim 1, characterized in that The bottom of the docking groove has a convex portion, and the through hole penetrates the convex portion.

4. The capillary adapter according to claim 3, characterized in that The convex portion has a cone shape.

5. The capillary adapter according to claim 2, characterized in that The inner wall of the guide section gradually moves away from the central axis of the capillary adapter from the clamping section toward the direction away from the docking groove, forming a first guide slope with a gradually increasing inner diameter of the through hole.

6. The capillary adapter according to claim 2, characterized in that The inner wall of the guide section gradually approaches the central axis of the capillary adapter from the second end of the capillary adapter toward the docking groove, forming a second guide slope with a gradually decreasing inner diameter of the through hole.

7. A sample injection assembly, characterized in that: include: The injection needle assembly comprises an injection needle body and an injection needle extending from the head end of the injection needle body; The capillary adapter has a first end and a second end and a through hole penetrating the first end and the second end. The first end surface has a docking groove adapted to fit the injection needle. The through hole is used to clamp the capillary at least at one end adjacent to the bottom of the docking groove.

8. The sample injection assembly according to claim 7, characterized in that: The through hole has a clamping section and a guiding section. The clamping section has a radial dimension smaller than the outer diameter of the capillary and is located at one end of the through hole adjacent to the bottom of the docking groove. The guiding section has a radial dimension larger than the outer diameter of the capillary and is located at one end of the through hole away from the bottom of the docking groove.

9. The injection assembly according to claim 7, characterized in that: The bottom of the docking groove is provided with a convex portion, the through hole penetrates the convex portion, and the convex portion matches the concave surface extending from the head end of the injection needle body.

10. The injection assembly according to claim 7, characterized in that: The side wall of the docking groove has a first section, a second section and a third section in the axial direction of the capillary adapter, the first section and the third section are parallel to the central axis of the capillary adapter, the second section connects the first section and the third section, and the first section is closer to the bottom of the docking groove and the central axis of the capillary adapter than the third section; The outer wall of the head end of the injection needle body has a first surface, a second surface and a third surface in the axial direction, at least a portion of the first surface abuts against the first section of the docking groove, at least a portion of the second surface abuts against the second section of the docking groove, at least a portion of the third surface abuts against the third section of the docking groove, the first surface is parallel to the third surface, and the second surface connects the first surface and the third surface.

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