A device for detecting endocrine clinical patient

Abstract

The utility model discloses a kind of endocrinology clinical patient detection device for detection, including body fluid storage box, the blood sample low-temperature taking box cavity and blood thermostatic storage box of body fluid storage box, the upper end of blood sample low-temperature taking box cavity is equipped with movable sealing cover, the top of movable sealing cover is connected with fixed handle, the inside of blood sample low-temperature taking box cavity is provided with low-temperature ice bag sliding drawer, temperature display is installed on the outer wall of blood thermostatic storage box, the inside of blood thermostatic storage box is provided with test tube plug-in board, realize quick refrigeration in cold storage area by setting low-temperature ice bag sliding drawer and blood storage groove combination structure, simultaneously, constant temperature keeping of blood sample sample is realized by heating block and thermostatic storage box cavity combination. It is suitable for endocrinology clinical blood sampling-pending-storage-waiting detection and the like continuous process, both avoid enzyme activity loss caused by temperature fluctuation, and reduce liquid stratification due to condensation, guarantee sensitive index detection accuracy of hormone.

Description

Technical Field

[0001] This utility model relates to the field of body fluid preservation, and in particular to a device for collecting samples from clinical patients in endocrinology departments for testing. Background Technology

[0002] With the increasing number of endocrine disease testing items, hospital clinical departments are gradually adopting body fluid sample collection, short-term preservation, and intra-departmental turnover as routine procedures. In this specific scenario, departments typically need to utilize structured body fluid preservation devices to maintain the physical stability and testing validity of body fluid samples by cryopreserving, keeping blood samples from different sources at constant temperatures, and facilitating short-term transport. Therefore, a multi-chamber body fluid preservation structure that simultaneously possesses cryopreservation, prevention of cross-contamination, and temperature control capabilities has become an indispensable device in the body fluid management process of endocrinology departments.

[0003] However, the fluid preservation boxes widely used in hospitals at present are mostly single-chamber, single-insulation structure or simple partition structure, which are difficult to meet the actual needs of blood samples to maintain activity and stability under low temperature conditions; at the same time, it is also difficult to manage blood test tubes in different states or for different purposes by temperature zone differentiation.

[0004] Because traditional body fluid storage boxes mostly use a uniform cavity, single-layer insulation structure or storage method without distinguishing temperature control areas, when blood samples are collected from the department and arrive at the storage container, factors such as uneven cooling by ice packs, unstable thermal conductivity of the cavity insulation layer, and loose positioning structure of test tubes can all lead to unstable temperature field distribution inside the box.

[0005] The presence of both low-temperature and normal-temperature zones can cause some test tubes to become extremely cold, recover too quickly, or experience repeated temperature cycles. This not only affects the stability of hormone indicators but can also lead to abnormal consequences such as sample coagulation, abnormal sedimentation, and increased deposits on the tube walls, resulting in biases in subsequent tests. This problem becomes more pronounced as the number of samples increases. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a clinical patient sampling device for endocrinology.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a clinical patient sampling device for endocrinology, comprising a body fluid storage box, the body fluid storage box including a low-temperature blood sample collection chamber and a constant-temperature blood storage box, a movable sealing cover installed at the upper end of the low-temperature blood sample collection chamber, a fixed handle connected to the top of the movable sealing cover, a low-temperature ice pack drawer provided inside the low-temperature blood sample collection chamber, a temperature display installed on the outer wall of the constant-temperature blood storage box, and a test tube insertion plate provided inside the constant-temperature blood storage box, wherein the blood sample... The low-temperature retrieval chamber is equipped with a blood preservation tank, the upper end of which is fitted with a blood sample sealing cap. The blood preservation tank also contains a supporting movable tray and an elastic return spring. A heating block is installed on the inner wall of the blood constant-temperature preservation chamber. An arc-shaped test tube holding groove is provided inside the test tube insertion plate, and a blood preservation tube is placed inside the arc-shaped test tube holding groove. The low-temperature retrieval chamber is further equipped with a first engineering plastic layer, a second engineering plastic layer, a high-density closed-cell foam layer A, a polyurethane thermal insulation layer, and a high-density closed-cell foam layer B.

[0008] As a further description of the above technical solution: The blood sample low-temperature retrieval chamber is integrated with the urine storage chamber, and the urine storage chamber is integrated with the blood constant-temperature storage chamber. The blood sample low-temperature retrieval chamber, the urine storage chamber, and the blood constant-temperature storage chamber are the same size. The movable sealing cover is detachably installed on the top of the blood sample low-temperature retrieval chamber. The low-temperature ice pack slide drawer is movably connected to the inside of the blood sample low-temperature retrieval chamber. Ice packs are placed inside the low-temperature ice pack slide drawer. The fixed handle is fixedly installed on the top of the movable sealing cover.

[0009] As a further description of the above technical solution: The temperature display is fixedly installed on the outer wall of the blood constant temperature preservation box, the test tube connector is inserted into the inside of the blood constant temperature preservation box, and there are several test tube connectors. The heating block is fixedly installed on the inner wall of the blood constant temperature preservation box, and there are several heating blocks.

[0010] As a further description of the above technical solution: The blood preservation tank is located inside the blood sample low-temperature collection chamber. There are several blood preservation tanks. The blood sample sealing cover is movably connected to the top of the blood preservation tank. The size of the blood sample sealing cover is adapted to the size of the blood preservation tank. The elastic return spring inside the tank is movably connected to the inside of the blood preservation tank. The bottom of the elastic return spring is fixedly connected to the blood preservation tank, and the top is fixedly connected to the supporting movable plate.

[0011] As a further description of the above technical solution: The blood sample low-temperature collection chamber is internally filled, with the first and second engineering plastic layers disposed on the outer layer of the internal filling. The high-density closed-cell foam layer A is fixedly connected to one side of the first engineering plastic layer, and the high-density closed-cell foam layer B is fixedly connected to one side of the second engineering plastic layer. The polyurethane thermal insulation layer is fixedly connected between the high-density closed-cell foam layer A and the high-density closed-cell foam layer B.

[0012] As a further description of the above technical solution: The arc-shaped test tube holding slot is formed inside the test tube insertion plate. The arc-shaped test tube holding slot is arc-shaped, and there are several arc-shaped test tube holding slots. The blood preservation tube is inserted into the arc-shaped test tube holding slot, and there are several blood preservation tubes.

[0013] This utility model has the following beneficial effects: The system achieves rapid cooling of the refrigerated area by combining a low-temperature ice pack drawer and a blood preservation tank, while maintaining a constant temperature for blood samples using a combination of a heating block and a constant-temperature preservation chamber. It is suitable for continuous processes in endocrinology clinics, including blood collection, temporary storage, and awaiting testing. This design avoids enzyme activity loss caused by temperature fluctuations and reduces liquid stratification due to condensation, ensuring the accuracy of sensitive indicator detection such as hormones.

[0014] The device employs a five-layer composite insulation structure, consisting of a first engineering plastic layer, a high-density closed-cell foam layer, a polyurethane insulation layer, and a second engineering plastic layer. This enhances the overall insulation capacity of the enclosure, effectively isolating it from external temperature fluctuations and heat intrusion. It is particularly suitable for complex temperature and humidity changes in mobile sampling or clinical outpatient environments. The multi-layer structure not only improves the structural strength of the device but also extends the duration of low-temperature and constant-temperature effects.

[0015] The blood preservation tank is equipped with a support plate and an elastic return spring, which automatically buffers external vibrations, keeps the test tubes upright, and prevents risks such as tilting, collisions, and breakage. The arc-shaped test tube holding groove in the constant temperature zone fits snugly against the outer wall of the test tube, ensuring stable fixation during handling. The overall structure facilitates rapid insertion, centralized management, and transfer of samples by medical staff in complex operating scenarios.

[0016] A fixed handle at the top facilitates easy transport of the entire device, which has a compact structure suitable for bedside and outpatient mobile sample collection scenarios. A temperature display on the outer wall of the device monitors temperature changes within the constant temperature zone in real time, improving operational visibility and control accuracy, and preventing sample denaturation or test failure due to human error. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a clinical patient sampling device for endocrinology proposed in this utility model; Figure 2 This is a schematic diagram of the internal cavity of the low-temperature blood sample collection chamber of a clinical patient collection device for endocrinology proposed in this utility model. Figure 3 This is an enlarged structural diagram of part A of a clinical patient sampling device for endocrinology proposed in this utility model; Figure 4 This is a schematic diagram of the internal structure of a blood temperature-controlled storage box for a clinical patient sampling device in the endocrinology department proposed in this utility model.

[0018] Legend: 1. Body fluid storage box; 2. Blood sample low-temperature retrieval chamber; 3. Fixed handle; 4. Blood constant temperature storage box; 5. Movable sealing cover; 6. Low-temperature ice pack drawer; 7. Temperature display; 8. Test tube connector plate; 9. Blood storage tank; 10. Blood sample sealing cover; 11. Supporting movable tray; 12. Elastic return spring inside the tank; 13. First engineering plastic layer; 14. Second engineering plastic layer; 15. Heating block; 16. Arc-shaped test tube holding groove; 17. Blood storage tube; 18. High-density closed-cell foam layer A; 19. Polyurethane thermal insulation layer; 20. High-density closed-cell foam layer B. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] Reference Figure 1-4 One embodiment provided by this utility model: Example 1: A clinical patient sample collection device for endocrinology includes a body fluid storage box 1, which comprises a blood sample low-temperature collection chamber 2 and a blood constant-temperature storage chamber 4. A movable sealing cover 5 is installed at the upper end of the blood sample low-temperature collection chamber 2, and a fixed handle 3 is connected to the top of the movable sealing cover 5. A low-temperature ice pack drawer 6 is provided inside the blood sample low-temperature collection chamber 2. A temperature display 7 is installed on the outer wall of the blood constant-temperature storage chamber 4. A test tube insertion plate 8 is provided inside the blood sample low-temperature collection chamber 2. A blood storage tank 9 is provided inside the blood sample low-temperature collection chamber 2. The upper end of the blood storage tank 9 is equipped with a blood sample sealing cap 10. The inside of the blood storage tank 9 is equipped with a support movable tray 11 and an elastic return spring 12. The inner wall of the blood constant temperature storage box 4 is equipped with a heating block 15. The inside of the test tube insertion plate 8 is equipped with an arc-shaped test tube holding groove 16. The inside of the arc-shaped test tube holding groove 16 is equipped with a blood storage tube 17. The inside of the blood sample low temperature retrieval chamber 2 is equipped with a first engineering plastic layer 13, a second engineering plastic layer 14, a high-density closed-cell foam layer A18, a polyurethane thermal insulation layer 19, and a high-density closed-cell foam layer B20.

[0022] Working principle and usage process: This device integrates the low-temperature blood sample collection chamber and the constant temperature blood storage chamber into one structure, and is divided into two functional areas in terms of spatial layout: a low-temperature sampling and refrigeration area and a constant temperature storage and temperature control area, to meet the temperature control requirements of different body fluid samples.

[0023] Medical staff place the initially collected blood sample tubes into the blood preservation tank 9 within the low-temperature blood sample collection chamber 2. Because the bottom of the tank is equipped with a supporting movable tray 11 and an elastic return spring 12, the tube vibration is buffered and it automatically returns to a vertical position, preventing breakage due to shaking. Simultaneously, the chamber contains a low-temperature ice pack drawer 6, allowing medical staff to replace the ice packs as needed for refrigeration, ensuring the entire chamber maintains a suitable low-temperature environment, such as 2℃~8℃, thus achieving short-term refrigeration protection.

[0024] When samples need to be transported over short distances or stored at a constant temperature for a short period before testing, medical staff can take the test tubes out of the refrigeration area and insert them into the arc-shaped test tube holding slots 16 on the test tube insertion plate 8 inside the blood constant temperature storage box 4. This structural design facilitates the quick insertion and stable placement of test tubes.

[0025] The constant temperature preservation chamber is equipped with multiple heating blocks 15, which provide a gentle, constant temperature environment of 20℃~25℃ through low-power heating, preventing saliva or blood samples from condensing, settling, or losing activity at room temperature. This temperature control process is monitored and displayed in real time by a temperature display 7 installed on the outer wall of the chamber, allowing the operator to check the actual temperature status inside the preservation chamber at any time and adjust the heating control strategy accordingly.

[0026] The entire body fluid storage box incorporates a multi-layer insulation structure in its outer shell design: the first engineering plastic layer 13 and the second engineering plastic layer 14 form an inner and outer rigid support, and a high-density closed-cell foam layer A18, a polyurethane thermal insulation layer 19 and a high-density closed-cell foam layer B20 are compositely set in the middle, which can effectively isolate external heat conduction and temperature fluctuations, and improve the temperature control efficiency and thermal stability of the cold / hot zones.

[0027] Example 2: The blood sample low-temperature retrieval chamber 2 and the blood constant temperature preservation box 4 are integrated and connected. The blood sample low-temperature retrieval chamber 2 and the blood constant temperature preservation box 4 are the same size. The movable sealing cover 5 is detachably installed on the top of the blood sample low-temperature retrieval chamber 2. The low-temperature ice pack slide drawer 6 is movably connected to the inside of the blood sample low-temperature retrieval chamber 2. Ice packs are placed inside the low-temperature ice pack slide drawer 6. The fixed handle 3 is fixedly installed on the top of the movable sealing cover 5.

[0028] Temperature display 7 is fixedly installed on the outer wall of blood constant temperature preservation box 4. Test tube connector 8 is inserted into the inside of blood constant temperature preservation box 4. There are several test tube connector 8. Heating block 15 is fixedly installed on the inner wall of blood constant temperature preservation box 4. There are several heating blocks 15.

[0029] The improvement of the implementation scheme of this embodiment compared with the prior art is that the blood sample low temperature collection chamber 2 and the blood constant temperature storage box 4 are integrated into a design with uniform size and symmetrical layout, so that the functions of low temperature sampling and constant temperature storage can be completed continuously in the same device, avoiding transfer steps, which helps to improve the sample processing efficiency of the endocrinology department in outpatient and ward environments.

[0030] This embodiment introduces a movable sealing cover 5 structure, and achieves continuous refrigeration through an ice pack embedded in a low-temperature ice pack drawer 6. Medical staff can flexibly replace the ice packs according to the storage time or ambient temperature without opening the entire cabinet, maintaining the airtight state of the cabinet cavity and effectively preventing cold air loss. This structure is significantly superior to the existing technology that uses a fixed freezing cavity or condensation module, making maintenance more convenient and cost-effective.

[0031] Multiple heating blocks 15 are installed inside the blood preservation chamber 4, combined with multiple test tube insert plates 8 to achieve localized temperature control and zoned placement. The arc-shaped test tube holders in the test tube insert plates effectively fix the blood sample tubes, preventing slippage and collision, and improving preservation stability. The temperature display 7, located on the outer wall of the preservation chamber, provides real-time digital feedback, allowing medical staff to judge the internal temperature control status at any time. Under multi-task parallel sampling conditions, it can effectively reduce human operation judgment errors and improve the consistency of sample preservation and the comparability of test data.

[0032] Example 3: Blood preservation tank 9 is located inside the blood sample low-temperature collection chamber 2. There are several blood preservation tanks 9. Blood sample sealing cover 10 is movably connected to the top of blood preservation tank 9. The size of blood sample sealing cover 10 is adapted to the size of blood preservation tank 9. Elastic return spring 12 inside the tank is movably connected to the inside of blood preservation tank 9. The bottom of elastic return spring 12 inside the tank is fixedly connected to blood preservation tank 9, and the top is fixedly connected to support movable tray 11.

[0033] The improvement of this embodiment over the prior art lies in the following: In this embodiment, a set of internal elastic return springs 12 are provided inside each blood preservation tank 9, which work in conjunction with the upper supporting movable tray 11 to form a longitudinal elastic limiting and buffering structure. Compared to the traditional method of fixing test tubes using a rigid slot structure, such as the one disclosed in CN108958171A, this solution can automatically buffer the shaking impact during the movement and extraction of the box, effectively preventing the test tubes from being damaged, tipped over, or leaking liquid due to collisions, thus enhancing the device's adaptability to mobile environments.

[0034] Each blood preservation tank is equipped with a blood sample sealing cap 10, whose size is precisely matched to the preservation tank. This allows for top sealing after the test tube is inserted, forming a semi-sealed structure to prevent condensation or external liquids from dripping in, keeping the outer wall of the test tube clean and dry. This is significantly better than the problems of cross-compression and poor sealing caused by using through-cap or full-cap structures in existing technologies, and helps maintain the physical isolation of independent units when multiple tubes are placed side by side.

[0035] In this embodiment, there are several blood preservation slots, which can be evenly arranged according to the standard test tube size to form a parallel slot array structure. This facilitates medical staff to quickly fill and manage test tubes according to the test items, sampling batches, or time tags, thereby improving the operational efficiency and batch control capabilities in the sampling-preservation-transfer process.

[0036] During each test tube extraction operation, the user does not need to manually probe the bottom of the tank. Instead, the test tube is gently lifted to a height that is easy to grip by a spring-loaded support plate. This design is particularly suitable for scenarios where gloves are worn or for continuous sampling of multiple tubes, effectively reducing operator fatigue. This design is relatively rare in existing technologies, demonstrating the improvements in user experience and ergonomic structure of this implementation scheme.

[0037] Example 4: The blood sample low-temperature collection chamber 2 is filled with an internal filling. The first engineering plastic layer 13 and the second engineering plastic layer 14 are set on the outer layer of the internal filling. The high-density closed-cell foam layer A18 is fixedly connected to one side of the first engineering plastic layer 13, the high-density closed-cell foam layer B20 is fixedly connected to one side of the second engineering plastic layer 14, and the polyurethane thermal insulation layer 19 is fixedly connected between the high-density closed-cell foam layer A18 and the high-density closed-cell foam layer B20.

[0038] An arc-shaped test tube holding slot 16 is formed inside the test tube insertion plate 8. The arc-shaped test tube holding slot 16 is arc-shaped, and there are several arc-shaped test tube holding slots 16. A blood preservation tube 17 is inserted into the arc-shaped test tube holding slot 16, and there are several blood preservation tubes 17.

[0039] The advantages of this embodiment over the prior art are as follows: the multi-layer composite structure improves the thermal insulation performance of the box and ensures the stability of the sample storage temperature; the first engineering plastic layer 13 and the second engineering plastic layer 14 serve as structural shell support; the high-density closed-cell foam layers A18 and B20 provide basic thermal insulation and buffering; and the polyurethane thermal insulation layer 19 serves as the core thermal barrier area and has good thermal inertia. The engineering plastic layer and the foam layer are not directly bonded together, but rather formed by an elastic transition through a polyurethane layer. This structural design can play a role in shock absorption, buffering, and structural deformation absorption in sudden situations such as rapid sample movement or device drop, significantly improving overall safety and meeting the needs of high-frequency clinical use scenarios.

[0040] In this embodiment, the arc-shaped test tube holding groove 16 adopts an arc-shaped structure that fits the outer wall of the test tube cylinder, so that the blood preservation tube 17 can be wrapped and limited at multiple points after insertion, effectively avoiding loosening, shaking, impact or falling off of the test tube due to dimensional tolerances or equipment vibration.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clinical patient sampling device for endocrinology, comprising a body fluid storage box (1), characterized in that: The body fluid preservation box (1) includes a blood sample low-temperature collection chamber (2) and a blood constant temperature preservation chamber (4). A movable sealing cover (5) is installed at the upper end of the blood sample low-temperature collection chamber (2), and a fixed handle (3) is connected to the top of the movable sealing cover (5). A low-temperature ice pack drawer (6) is provided inside the blood sample low-temperature collection chamber (2). A temperature display (7) is installed on the outer wall of the blood constant temperature preservation chamber (4). A test tube insertion plate (8) is provided inside the blood constant temperature preservation chamber (4). A blood preservation tank (9) is provided inside the blood sample low-temperature collection chamber (2), and a blood preservation tank (9) is installed at the upper end of the blood preservation tank (9). The sample sealing cap (10) is provided inside the blood preservation tank (9), which is equipped with a support movable tray (11) and an elastic return spring (12) inside the tank. The inner wall of the blood constant temperature preservation box (4) is equipped with a heating block (15). The inside of the test tube insertion plate (8) is equipped with an arc-shaped test tube holding groove (16). The inside of the arc-shaped test tube holding groove (16) is equipped with a blood preservation tube (17). The inside of the blood sample low temperature collection chamber (2) is equipped with a first engineering plastic layer (13), a second engineering plastic layer (14), a high-density closed-cell foam layer A (18), a polyurethane thermal insulation layer (19), and a high-density closed-cell foam layer B (20).

2. The endocrinology clinical patient sampling device for testing according to claim 1, characterized in that: The blood sample low-temperature collection chamber (2) and the blood constant temperature storage box (4) are integrated. The blood sample low-temperature collection chamber (2) and the blood constant temperature storage box (4) are the same size. The movable sealing cover (5) is detachably installed on the top of the blood sample low-temperature collection chamber (2). The low-temperature ice pack drawer (6) is movably connected to the inside of the blood sample low-temperature collection chamber (2). Ice packs are placed inside the low-temperature ice pack drawer (6). The fixed handle (3) is fixedly installed on the top of the movable sealing cover (5).

3. The endocrinology clinical patient sampling device for testing according to claim 1, characterized in that: The temperature display (7) is fixedly installed on the outer wall of the blood constant temperature storage box (4), the test tube connector (8) is inserted into the inside of the blood constant temperature storage box (4), and there are several test tube connectors (8). The heating block (15) is fixedly installed on the inner wall of the blood constant temperature storage box (4), and there are several heating blocks (15).

4. The endocrinology clinical patient sampling device for testing according to claim 1, characterized in that: The blood preservation tank (9) is located inside the blood sample low-temperature collection chamber (2). There are several blood preservation tanks (9). The blood sample sealing cover (10) is movably connected to the top of the blood preservation tank (9). The size of the blood sample sealing cover (10) is adapted to the size of the blood preservation tank (9). The elastic return spring (12) inside the tank is movably connected to the inside of the blood preservation tank (9). The bottom of the elastic return spring (12) inside the tank is fixedly connected to the blood preservation tank (9), and the top is fixedly connected to the supporting movable tray (11).

5. The endocrinology clinical patient sampling device for testing according to claim 1, characterized in that: The blood sample low-temperature collection chamber (2) is filled with an internal filling. The first engineering plastic layer (13) and the second engineering plastic layer (14) are placed on the outer layer of the internal filling. The high-density closed-cell foam layer A (18) is fixedly connected to one side of the first engineering plastic layer (13). The high-density closed-cell foam layer B (20) is fixedly connected to one side of the second engineering plastic layer (14). The polyurethane thermal insulation layer (19) is fixedly connected between the high-density closed-cell foam layer A (18) and the high-density closed-cell foam layer B (20).

6. The endocrinology clinical patient sampling device for testing according to claim 1, characterized in that: The arc-shaped test tube holding slot (16) is opened inside the test tube insertion plate (8). The arc-shaped test tube holding slot (16) is arc-shaped. There are several arc-shaped test tube holding slots (16). The blood preservation tube (17) is inserted into the arc-shaped test tube holding slot (16). There are several blood preservation tubes (17).

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