Sampling needle and sample analyzer
By designing a ventilation groove through the side wall on the outer needle of the sampling needle, the internal and external pressure difference problem when absorbing blood samples is solved, the stability of sample size and detection quality are improved, the structure is simplified, and the risk of cross-contamination is reduced.
Patent Information
- Application Number
- CN202323548110.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-25
AI Technical Summary
When absorbing blood samples, existing sampling needles are prone to instability in sample size due to internal and external pressure difference, and their complex structure is prone to cross-contamination.
A sampling needle is designed, and its outer needle is equipped with a ventilation groove that penetrates the side wall extends axially. The ventilation groove is located between the needle body and the needle tip to reduce internal and external pressure difference, and pierce the sealant plug through the outer needle to ventilate. , simplify the structure and reduce the risk of cross-contamination.
Through the design of the ventilation tank, the stability of sample absorption and detection quality are improved, the structure of the sampling needle is simplified, and the risk of cross-contamination is reduced.
Smart Images
Figure CN222166630U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of detection equipment, and in particular to a sampling needle and a sample analyzer. Background Art
[0002] Microscopic examination of blood smears is a basic method of blood cytology examination, especially for the diagnosis of various blood diseases. It is widely used in clinical testing.
[0003] The blood sample sent for inspection is sealed and stored in a blood collection tube. The analysis instrument needs to use a sampling needle to pierce the sealing rubber stopper of the blood collection tube, insert it into the tube to absorb the blood sample, and then smear it on a glass slide to form a blood smear, and then perform a microscopic examination. In the process of absorbing the sample, a pressure difference is easily generated inside and outside the blood collection tube, which affects the accuracy of the sampling needle to absorb the sample volume. Therefore, the sampling needle needs to have a ventilation function to balance the internal and external pressures in time.
[0004] A common solution on the market is to set a ventilation passage parallel to the sample suction passage inside the sampling needle, and to feed gas through the ventilation passage when sucking the sample to maintain pressure balance. However, the setting of multiple passages will make the sampling needle structure complex, increase the difficulty of manufacturing, and easily have dead corners for cleaning, resulting in cross contamination when processing batch samples. Utility Model Content
[0005] In order to solve the above technical problems, the first purpose of the utility model is to provide a sampling needle; the second purpose of the utility model is to provide a sample analyzer. The sampling needle and sample analyzer provided by the present application can timely ventilate the sample by using the ventilation groove provided on the outer needle to reduce the pressure difference between the inside and outside of the blood collection tube, so that the sample amount sucked by the sample suction component each time remains stable, thereby improving the quality stability of making blood smears and testing.
[0006] The technical solution provided by the utility model is as follows:
[0007] A sampling needle comprises an outer needle and a sample suction component arranged inside the outer needle.
[0008] The outer needle comprises a needle body and a needle tip connected to each other.
[0009] The outer needle is also provided with a ventilation groove penetrating the side wall. The ventilation groove extends axially, with one end located at the needle body and the other end located at the needle tip.
[0010] Preferably, the distance T1 between the ventilation groove and the edge of the needle tip is greater than or equal to 2 mm.
[0011] Preferably, the venting groove is located above the tip of the needle.
[0012] Preferably, the length of the vent groove at the needle tip is H2, and the ratio of H2 to the needle tip length T is: H2 is 1 / 2 to 3 / 4 of T.
[0013] Preferably, the length H1 of the vent groove at the needle body portion is greater than or equal to the length H2 of the vent groove at the needle tip portion.
[0014] Preferably, H1 is greater than or equal to 2 mm, and H2 is 2-10 mm.
[0015] Preferably, the width of the ventilation groove is 1 / 10 to 1 / 2 of the outer diameter of the needle body.
[0016] Preferably, the sample suction component is specifically an inner needle, and the inner needle can be raised and lowered relative to the outer needle.
[0017] Preferably, a mounting seat is provided at one end of the outer needle away from the needle tip, and the mounting seat is provided with a channel for the inner needle to pass through.
[0018] A sample analyzer comprises any one of the sampling needles described above.
[0019] In view of the problems existing in the prior art, the present application provides a sampling needle, including an outer needle and a sample suction component arranged inside the outer needle, the outer needle including a connected needle body and a needle tip, and the outer needle is also provided with a ventilation groove penetrating the side wall, the ventilation groove extends axially, and one end is located at the needle body, and the other end is located at the needle tip. The sampling needle provided by the present application, because the ventilation groove penetrates the side wall of the outer needle, forms a cavity for air flow, so the outer needle is used to pierce the sealing rubber plug of the blood collection tube, and the ventilation groove provided by the outer needle is partially located above the sealing rubber plug and partially located below the sealing rubber plug, which can connect the inside and outside of the blood collection tube, and when the sample suction component sucks the sample in the tube, it can be ventilated in time to reduce the pressure difference between the inside and the outside, so that the amount of sample sucked by the sample suction component each time remains stable, thereby improving the quality stability of making blood smears and testing. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 This is a schematic diagram of the structure of the sampling needle in the embodiment of the utility model;
[0022] Figure 2 This is a cross-sectional schematic diagram of a sampling needle in an embodiment of the utility model;
[0023] Figure 3 for Figure 2 A partial enlarged schematic diagram of
[0024] Figure 4Schematic diagram of the partial structure of the outer needle in the embodiment of the utility model; wherein H is the length of the ventilation groove, and T is the length of the needle tip;
[0025] Figure 5 Schematic diagram of the local structure of the outer needle in the embodiment of the utility model (from another angle); wherein H1 is the length of the venting groove at the needle body part, H2 is the length of the venting groove at the needle tip part and is equal to T2; T1 is the distance between the venting groove and the top of the needle tip;
[0026] Figure numerals: 1 - outer needle; 11 - needle body; 12 - needle tip; 2 - inner needle; 3 - ventilation groove; 4 - mounting seat; 41 - seat body; 411 - first through hole; 42 - cover plate; 421 - second through hole; 43 - sealing member. DETAILED DESCRIPTION
[0027] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0028] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.
[0031] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.
[0032] As shown in the figure, the embodiment of the utility model provides a sampling needle, comprising an outer needle 1, and a sample suction component arranged inside the outer needle 1.
[0033] The outer needle 1 comprises a needle body 11 and a needle tip 12 connected to each other.
[0034] The outer needle 1 is further provided with a ventilation groove 3 penetrating the side wall. The ventilation groove 3 extends axially, with one end located at the needle body 11 and the other end located at the needle tip 12 .
[0035] In view of the problems existing in the prior art, the present application provides a sampling needle, including an outer needle 1, and a sample suction component disposed inside the outer needle 1, wherein the outer needle 1 includes a connected needle body 11 and a needle tip 12, and the outer needle 1 is also provided with a ventilation groove 3 penetrating the side wall, the ventilation groove 3 extending in the axial direction, and one end of which is located at the needle body 11, and the other end of which is located at the needle tip 12. The sampling needle provided in the present application, since the ventilation groove 3 penetrates the side wall of the outer needle 1, a cavity for air flow is formed, and thus the outer needle 1 is used to pierce the sealing rubber plug of the blood collection tube, and the ventilation groove 3 provided on the outer needle 1 is partially located above the sealing rubber plug and partially located below the sealing rubber plug, the inside and outside of the blood collection tube can be connected, and when the sample suction component sucks the sample in the tube, timely ventilation can be achieved to reduce the pressure difference between the inside and outside, so that the amount of sample sucked by the sample suction component each time remains stable, thereby improving the quality stability of making blood smears and testing.
[0036] The sampling needle provided in the present application has a ventilation groove 3 located on both the needle body 11 and the needle tip 12 of the outer needle 1. When in use, the puncture of the outer needle 1 can simultaneously meet the requirements of the puncture of the space inside and outside the rubber plug and the connecting tube. The operation is simple, and the stroke of the sampling needle is suitable and easy to control.
[0037] In the present application, the needle body 11 refers to the main part of the outer needle 1 in a round tube shape, and the needle tip 12 refers to the part that gradually narrows to form a sharp puncture surface. The needle body 11 and the needle tip 12 are named differently for the convenience of explanation, and do not limit the preparation process of the outer needle 1. The needle body 11 and the needle tip 12 can be integrally formed or prepared in any other way.
[0038] Preferably, the distance T1 between the ventilation groove 3 and the edge of the needle tip 12 is greater than or equal to 2 mm.
[0039] There is a certain distance between the vent groove 3 and the edge of the needle tip 12. Preferably, the distance T1 is greater than or equal to 2 mm, so as to ensure that the strength of the needle tip 12 can meet the needs of puncture, and the bottom of the vent groove 3 can be lower than the bottom of the rubber plug, connecting the space inside the tube and the external space.
[0040] Preferably, the venting groove 3 is located above the top of the needle tip 12 .
[0041] The shape of the needle tip 12 can be any common shape in the art, and is generally a structure that gradually narrows from the end connected to the needle body 11 to form a tip (i.e., the top of the needle tip 12). Preferably, the vent groove 3 is located above the top of the needle tip 12, and because the vent groove 3 extends axially, the vent groove 3 is located on a line parallel to the top of the needle tip 12 and the axis.
[0042] Preferably, the length of the vent groove 3 at the needle tip 12 is H2, and the ratio of H2 to the length T of the needle tip 12 is 1 / 2 to 3 / 4 of T.
[0043] Preferably, the venting groove 3 is located at the length H2 of the needle tip 12, which accounts for 1 / 2 to 3 / 4 of the length T of the needle tip 12, which can meet the requirements of puncture strength and the minimum distance required for the atmospheric communication needle to be inserted.
[0044] Preferably, the length H1 of the vent groove 3 at the needle body 11 is greater than or equal to the length H2 of the vent groove 3 at the needle tip 12 .
[0045] Preferably, the length H1 of the vent groove 3 at the needle body 11 is greater than or equal to the length H2 of the vent groove 3 at the needle tip 12, which can meet the ventilation needs.
[0046] Preferably, H1 is greater than or equal to 2 mm, and H2 is 2-10 mm.
[0047] More preferably, the length H1 of the ventilation groove 3 at the needle body 11 is greater than or equal to 2 mm, and the length H2 of the ventilation groove 3 at the needle tip 12 is 2~10 mm, then the total length H of the ventilation groove 2 is greater than or equal to 4 mm, and the total length H will be maintained at least 2 mm larger than the length H2.
[0048] At the same time, since H1 is greater than or equal to H2, according to the different lengths set for H2, H1 will also be selected to be equal to or greater than H2. The length of H1 can be much greater than the length of H2, for example, up to 10-30 mm.
[0049] Preferably, the width of the ventilation groove 3 is 1 / 10 to 1 / 2 of the outer diameter of the needle body 11 .
[0050] Preferably, the width of the ventilation groove 3 is 1 / 10 to 1 / 2 of the outer diameter of the needle body 11, which can play a ventilation role without affecting the puncture strength of the needle.
[0051] Preferably, the sample suction component is specifically an inner needle 2 , and the inner needle 2 can be raised and lowered relative to the outer needle 1 .
[0052] More preferably, the sample suction component is an inner needle 2, and the inner needle 2 can be raised and lowered relative to the outer needle 1. When sampling, the outer needle 1 first pierces the rubber stopper and stays at a suitable position to connect the inner and outer spaces of the tube, and then the inner needle 2 descends, extends into the blood collection tube from the inside of the outer needle 1, and sucks the sample.
[0053] The outer needle 1 plays the role of puncturing and protecting the inner needle 2, so the size and wall thickness of the outer needle 1 itself can be designed to be larger, so that its strength and durability meet the requirements of repeated use.
[0054] Preferably, a mounting seat 4 is provided at one end of the outer needle 1 away from the needle tip 12 , and the mounting seat 4 is provided with a channel for the inner needle 2 to pass through.
[0055] Preferably, a mounting seat 4 is provided at one end of the outer needle 1 away from the needle tip 12 to facilitate connection with an instrument; the mounting seat 4 is provided with a channel for the inner needle 2 to pass through.
[0056] More specifically, the mounting seat 4 includes a seat body 41 and a cover sheet 42, which are connected by fasteners; the seat body 41 is provided with a first through hole 411, and the cover sheet 42 is provided with a second through hole 421. The first through hole 411 and the second through hole 421 form a passage for the inner needle 2 to pass through; the outer needle 1 is fixed to one end of the first through hole 411 away from the cover sheet 42, and one end of the first through hole 411 close to the cover sheet 42 is provided with a sealing member 43 that matches the inner needle 2.
[0057] In addition, the mounting seat 4 may also be provided with a cleaning channel to clean the outer needle 1 and the inner needle 2 .
[0058] A sample analyzer comprises any of the sampling needles described above.
[0059] The present application also provides a sample analyzer including the above-mentioned sampling needle.
[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A sampling needle, characterized in that: It comprises an outer needle (1) and a sample suction component arranged inside the outer needle (1). The outer needle (1) comprises a needle body (11) and a needle tip (12) connected to each other. The outer needle (1) is also provided with a ventilation groove (3) penetrating the side wall. The ventilation groove (3) extends axially, with one end located at the needle body (11) and the other end located at the needle tip (12).
2. The sampling needle according to claim 1, characterized in that: The distance T1 between the ventilation groove (3) and the edge of the needle tip (12) is greater than or equal to 2 mm.
3. The sampling needle according to claim 2, characterized in that: The ventilation groove (3) is located above the top of the needle tip (12).
4. The sampling needle according to claim 3, characterized in that: The length of the vent groove (3) located at the needle tip (12) is H2, and the ratio between H2 and the length T of the needle tip (12) is: H2 is 1 / 2 to 3 / 4 of T.
5. The sampling needle according to claim 1, characterized in that: The length H1 of the ventilation groove (3) located at the needle body (11) is greater than or equal to the length H2 of the ventilation groove (3) located at the needle tip (12).
6. The sampling needle according to claim 5, characterized in that: H1 is greater than or equal to 2mm, and H2 is 2 to 10mm.
7. The sampling needle according to claim 1, characterized in that: The width of the ventilation groove (3) is 1 / 10 to 1 / 2 of the outer diameter of the needle body (11).
8. The sampling needle according to any one of claims 1 to 7, characterized in that: The sample suction component is specifically an inner needle (2), and the inner needle (2) can be raised and lowered relative to the outer needle (1).
9. The sampling needle according to claim 8, characterized in that: A mounting seat (4) is provided at one end of the outer needle (1) away from the needle tip (12), and the mounting seat (4) is provided with a channel for the inner needle (2) to pass through.
10. A sample analyzer, characterized in that: The invention comprises the sampling needle according to any one of claims 1 to 9.