Portable electrochemical blood sampling and detecting integrated device

Abstract

The invention relates to the technical field of blood glucose detection, and particularly discloses a portable electrochemical blood sampling and detection integrated device which comprises a reusable instrument main body and a disposable detection head, the instrument main body comprises a mechanical trigger mechanism and a detection circuit, and the mechanical trigger mechanism comprises a pulling plug capable of being pulled, a force storage spring connected with the pulling plug, an impact rod driven by the force storage spring and a trigger button used for releasing the force storage spring; the detection circuit comprises a processor for electrochemical signal analysis and a display screen for displaying results; the disposable detection head comprises a shell, the shell comprises a connecting part and a contact part, the connecting part is in a hollow cylinder shape, and one end of the connecting part is fixedly connected with the contact part; by adopting the technical scheme, the blood can be prevented from being completely exposed in the external environment in the transfer process from the skin to the test paper, the closeness in the blood sampling process is ensured, the collection speed and quantity of a blood sample are accurately controlled, and the safety in the use process is improved.

Description

Technical Field

[0001] This invention relates to the field of blood glucose detection technology, and in particular to a portable electrochemical blood collection and detection integrated device. Background Technology

[0002] In the field of portable electrochemical detection, existing technologies, such as blood glucose meters and uric acid analyzers, have significant limitations in their detection processes and structural designs. These devices generally adopt a "split-type" structure, consisting of separate blood collection components (blood collection pen and lancet) and detection components (detector and test strips). The two components need to be used together and require different consumables, resulting in cumbersome operation and potential safety hazards.

[0003] Specifically, the existing testing process involves several independent steps: First, the user must manually insert a disposable lancet into the lancing device, set the lancet depth using the mechanical adjustment mechanism on the device, then prick the skin at the fingertip with the lancing device. After blood flows out, the lancing device must be removed and set aside. Next, the test strip must be taken out of the packaging, inserted into the slot of the testing device, and the blood-absorbing area of ​​the test strip must be aligned with the blood at the fingertip. The testing device will only start testing after the blood has soaked into the reaction area of ​​the test strip through capillary action. After the test is completed, the used test strip must be manually removed and discarded, and the discarded lancet in the lancing device must be removed and placed separately in a special container or trash can.

[0004] The shortcomings of the above process stem from the inherent limitations of its structural design: First, the operation steps are fragmented, requiring repeated switching between two independent devices for blood collection and testing, and manual handling of two types of consumables. This presents a high learning cost and operational difficulty for the elderly, people with mobility impairments, and others, and can easily lead to test failure due to confusion of steps. Second, there is a high risk of cross-contamination. During the handling of needles and test strips after blood collection, there is a high probability that hands will come into direct contact with blood or contaminated parts, increasing the risk of infection with blood-borne diseases. Third, there is insufficient safety. Blood collection needles are prone to accidentally pricking users during assembly and disassembly, and carelessly discarded needles may also cause accidental injury to cleaning personnel. Fourth, blood collection efficiency depends on manual control, and the blood flow rate is unstable. If the blood volume is insufficient, a second puncture is required; if the blood volume is excessive, it may contaminate hands or the instrument surface, further increasing the operational burden.

[0005] Furthermore, the existing technology's separate design for blood collection and detection exposes the blood transfer process from the skin to the test strip entirely to the external environment. This compromises both the sealing of the blood collection process and the control of the collection speed and volume, making the detection accuracy susceptible to external interference. These issues have long hampered the usability and safety of portable electrochemical detection devices, necessitating an integrated and automated solution. Summary of the Invention

[0006] This invention provides a portable electrochemical blood collection and testing device that avoids the complete exposure of blood to the external environment during the transfer process from the skin to the test strip, ensuring the closed nature of the blood collection process, and more accurately controlling the collection speed and volume of blood samples, thereby improving safety during use.

[0007] To solve the above-mentioned technical problems, this application provides the following technical solution: A portable electrochemical blood collection and testing device is characterized by comprising: a reusable instrument body and a disposable detection head; the instrument body includes a mechanical triggering mechanism and a detection circuit, the mechanical triggering mechanism includes a pull-out latch, a storage spring connected to the latch, an impact rod driven by the storage spring, and a trigger button for releasing the storage spring; the detection circuit includes a processor for electrochemical signal analysis and a display screen for displaying results. The disposable detection head includes: The outer casing includes a connecting portion and a contact portion. The connecting portion is a hollow cylindrical shape, with one end fixedly connected to the contact portion and the other end detachably connected to the instrument body. A silicone sleeve is fixed inside the connecting part and is correspondingly arranged with the impact rod. A blood collection needle is fixedly connected to the inside of the sleeve. A blood suction chamber is provided inside the contact part. The blood suction chamber is located below the silicone sleeve and forms a closed space with the silicone sleeve. The contact part is provided with a blood collection channel for accommodating the blood collection needle. One end of the blood collection channel is connected to the blood absorption chamber, and the other end of the blood collection channel is connected to the outside. An electrochemical detection electrode is fixed at the connection between the blood absorption chamber and the blood collection channel. The connecting part or contact part is provided with a first contact point, which is electrically connected to the electrochemical electrode. The instrument body is provided with a second contact point, which is electrically connected to the processor. The first contact point and the second contact point are connected when the connecting part is connected to the instrument body.

[0008] The basic principle and beneficial effects of the scheme are as follows: When the mechanical triggering mechanism is triggered (elastic release), the impact rod strikes the silicone sleeve, causing it to deform. The gas in the blood absorption chamber is discharged unidirectionally through the exhaust channel. The blood collection needle, along with the deformation of the silicone sleeve, passes through the blood collection channel and punctures the skin. When the impact rod resets, the elastic recovery of the silicone sleeve causes the blood absorption chamber to generate negative pressure. Blood is drawn into the blood absorption chamber through the blood collection groove and blood collection channel and soaks the detection area. The detection circuit obtains electrochemical signals through the electrodes in the detection area and displays the results. The blood collection needle retracts into the blood absorption chamber as the silicone sleeve fully recovers.

[0009] Specifically, the disposable detection head is detachably connected to the instrument body through the connecting part of the outer shell. After assembly, the first contact on the detection head is automatically connected to the second contact on the instrument body, so that the electrochemical detection electrode inside the detection head is electrically connected to the processor of the instrument body, laying the foundation for the transmission of detection signals.

[0010] The blood-absorbing chamber and the silicone sleeve form a closed space with a fixed volume, and the elastic recovery force of the silicone sleeve is stable, so the negative pressure intensity is controllable. This allows for precise control of the blood aspiration rate (avoiding sample overflow due to excessive flow rate or detection delay due to excessive flow rate). At the same time, an electrochemical detection electrode is fixed at the connection between the blood-absorbing chamber and the blood collection channel to ensure that the blood just meets the reaction requirements of the electrochemical detection electrode. This avoids detection failure due to insufficient blood collection and prevents sample waste or chamber overflow due to excessive blood collection.

[0011] The lancet is fixed inside the silicone sleeve. After puncture, it retracts into the blood collection channel and aspiration chamber along with the silicone sleeve, with no external exposure throughout the process. This completely eliminates the risk of needle stick injuries caused by exposed lancets in traditional testing (including self-injury during user operation and injury to cleaning personnel during subsequent waste disposal). The disposable test head has an independently sealed structure and can be discarded as a whole after use, avoiding the cumbersome operation of separating the lancet from the test strip in traditional testing and reducing safety hazards during waste disposal.

[0012] Blood is directly drawn into the blood collection channel and comes into contact with the electrochemical detection electrode, eliminating the intermediate steps of blood absorption by test strips and sample diffusion to the reaction area in traditional detection. The detection can be started instantly after the blood enters the chamber, significantly shortening the time from blood collection to result output. The enclosed space avoids interference from external impurities (such as sweat and dust) on the blood sample. At the same time, the stable negative pressure drive ensures full contact between the blood and the electrode, reducing detection errors caused by insufficient sample volume or insufficient contact, and improving the stability and accuracy of the electrochemical signal.

[0013] This invention reduces operational complexity, making it particularly suitable for the elderly, those with mobility issues, or those with limited operational skills. Furthermore, the main body of the instrument is reusable, requiring only the replacement of the disposable test head, thus reducing long-term operating costs and meeting hygiene standards. It achieves the goal of preventing the transfer of blood from the skin to the test strip from complete exposure to the external environment, ensuring the closed nature of the blood collection process, and providing more precise control over the speed and volume of blood sample collection, thereby improving safety during use.

[0014] Furthermore, the outer side of the connecting part is provided with an adjusting thread, and the connecting part is threadedly connected to the instrument body.

[0015] Furthermore, the contact portion is provided with an exhaust channel, one end of which is connected to the blood-absorbing chamber and the other end of which penetrates the outer wall of the detection head. The channel is provided with a one-way valve that only allows gas to be discharged from the blood-absorbing chamber to the outside. Furthermore, the opening of the blood collection channel is provided with a blood-gathering groove for collecting blood, and the inner diameter of the blood collection channel is smaller than the inner diameter of the exhaust channel.

[0016] Furthermore, the outer diameter of the contact portion is larger than the outer diameter of the connecting portion, and the first contact point is fixed at the contact surface when the contact portion is connected to the instrument body.

[0017] Furthermore, an auxiliary spring is provided between the first contact point and the contact portion, and the two ends of the auxiliary spring are fixedly connected to the first contact point and the contact portion, respectively. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a portable electrochemical blood collection and testing device; Figure 2 for Figure 1 A schematic diagram of the structure of a disposable detection head; Figure 3 An exploded view of the instrument body and the disposable detection head; Figure 4 for Figure 1 A schematic diagram of the local structure from another perspective; The markings in the accompanying drawings include: instrument body 10, disposable detection head 20, pull plug 11, energy storage spring 12, impact rod 13, trigger button 14, display screen 15, outer shell 21, connecting part 22, contact part 23, silicone sleeve 24, blood collection needle 25, blood suction chamber 30, blood collection channel 31, exhaust channel 32, one-way valve 33, first contact point 40, and connecting sleeve 50. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method: A portable electrochemical blood collection and testing device includes: a reusable instrument body 10 and a disposable detection head 20; the instrument body 10 includes a mechanical triggering mechanism and a detection circuit, the mechanical triggering mechanism includes a pull-out plug 11, a storage spring 12 connected to the plug 11, an impact rod 13 driven by the storage spring 12, and a trigger button 14 for releasing the storage spring 12; the detection circuit includes a processor for electrochemical signal analysis and a display screen 15 for displaying results.

[0020] In practical use, the structure of the instrument body 10 can refer to the existing drive structure of the lancet 25 in commercially available blood glucose meters. Essentially, the instrument body 10 is a combined unit of the detection host, lancet 25, and drive structure of a commercially available blood glucose meter. The outer shell of the instrument body 10 is hollow, and the pull tab 11 is located at the rear of the instrument body 10, i.e., attached... Figure 1 and attached Figure 4On the right side of the instrument body 10. The pull bolt 11 is slidably connected to the instrument body 10, meaning that the pull bolt 11 can be pulled out of the instrument body 10. During this stage, the pull bolt 11 completes the compression and energy storage of the energy storage spring 12. The pull bolt 11 and the impact rod 13 are fixedly connected (of course, they can also be detachable, meaning that the pull bolt 11 and the impact rod 13 move synchronously during the energy storage stage, but only the impact rod 13 can move during the release stage. In this embodiment, for ease of understanding, it is simply described as a fixed connection). Therefore, the impact rod 13 and the pull bolt 11 move synchronously to the right.

[0021] When the pull bolt 11 and the impact rod 13 reach the designated position, locking is completed by triggering the button 14. There are many possible structures for implementing the locking function; this embodiment describes the simplest method. A recessed hole is provided on the side of the pull bolt 11, and a locking block is placed inside the recessed hole. The locking block is slidably connected to the recessed hole. A locking spring is provided between the bottom of the locking block and the recessed hole to push the locking block out. The two ends of the locking spring are fixedly connected to the locking block and the recessed hole, respectively. Then, a locking hole is provided on the side of the instrument body 10 at the locking position. During the movement of the pull bolt 11 to the right, when the locking hole aligns with the recessed hole, a portion of the locking block is pushed from the recessed hole into the locking hole under the action of the locking spring, completing the locking.

[0022] The unlocking method involves fixing the trigger button 14 to the outside of the locking hole. A push rod is fixedly installed at the bottom of the trigger button 14. When the trigger button 14 is pressed, the push rod can push the locking block inward, thereby releasing the locking state. Under the action of the storage spring 12, the impact rod 13 is pushed to the left. Of course, there are many structures that can achieve the above functions. In addition to the one described in detail in the embodiments, the functions of the locking spring and the locking block can be integrated and implemented with the structure of a locking spring. That is, a locking spring is fixed to the side of the pull bolt 11, and a locking hole is still provided on the side of the instrument body 10. One end of the locking spring is fixed to the pull bolt 11, and the other end of the locking spring has a locking protrusion. The locking protrusion can be embedded in the locking hole. The structure of the trigger button 14 is similar to the previous structure, and it can break the state of the locking protrusion embedded in the locking hole by pressing. There are many similar structures, which will not be described in detail here.

[0023] The disposable detection head 20 (e.g.) Figure 2 (As shown) includes: The outer casing 21 includes a connecting portion 22 and a contact portion 23. The connecting portion 22 is a hollow cylindrical shape. One end of the connecting portion 22 is fixedly connected to the contact portion 23, and the other end of the connecting portion 22 is detachably connected to the instrument body 10. A silicone sleeve 24 is fixed inside the connecting part 22 and is correspondingly arranged with the impact rod 13. A blood collection needle 25 is fixedly connected to the inside. A blood suction cavity 30 is provided inside the contact part 23. The blood suction cavity 30 is located below the silicone sleeve 24 and forms a closed space with the silicone sleeve 24. The contact portion 23 has a blood collection channel 31 for accommodating the blood collection needle 25. In this embodiment, the blood collection channel 31 is vertical. One end of the blood collection channel 31 is connected to the blood absorption cavity 30, and the other end is connected to the outside. The lower end of the blood collection channel 31 is in contact with the user's skin.

[0024] An electrochemical detection electrode is fixed at the connection between the blood absorption cavity 30 and the blood collection channel 31. A first contact 40 is provided on the connecting part 22 or the contact part 23. The first contact 40 is electrically connected to the electrochemical electrode. A second contact is provided on the instrument body 10. The second contact is electrically connected to the processor. The first contact 40 and the second contact are connected when the connecting part 22 is connected to the instrument body 10.

[0025] The outer side of the connecting part 22 is provided with an adjusting thread, and the connecting part 22 is threadedly connected to the instrument body 10. This structure is for the convenience of the user in making the connection. In this embodiment, another connection method is provided, in which a connecting sleeve 50 is provided on the outer side of the connecting part 22 and the instrument body 10 (e.g., Figure 3 As shown in the figure, the connecting sleeve 50 is threadedly connected to the connecting part 22 and the instrument body 10 respectively, which allows the user to easily adjust the overall length.

[0026] The contact portion 23 is provided with an exhaust channel 32, one end of which connects to the blood suction chamber 30, and the other end penetrates the outer wall of the detection head. A one-way valve 33 is provided within the channel, allowing only gas to escape from the blood suction chamber 30 to the outside. The opening of the blood collection channel 31 is provided with a blood-gathering groove for collecting blood. The function of the blood-gathering groove is to utilize the surface tension of blood to improve the blood collection effect. On the one hand, when the contact portion 23 is in close contact with the human body and compressed, the blood-gathering groove makes the skin at that location more prominent than the area being compressed. On the other hand, after the blood collection needle 25 punctures the skin, some patients may bleed slowly; this structure can achieve the effect of squeezing (without additional operation) to induce bleeding. Furthermore, when blood seeps out of the skin, it forms blood beads due to surface tension. Without the blood-collecting groove, the contact part 23 would be in close contact with the skin, disrupting the surface tension. The blood would then rely solely on capillary action (also a form of surface tension, but insufficient to maintain the shape of the blood beads) to enter the gap between the skin and the contact part 23, posing a risk of leakage during collection and creating a safety hazard. The blood-collecting groove helps maintain the blood bead state during leakage, facilitating blood collection.

[0027] The inner diameter of the blood collection channel 31 is smaller than the inner diameter of the exhaust channel 32. The outer diameter of the contact portion 23 is larger than the outer diameter of the connecting portion 22, and the first contact point 40 is fixed at the contact surface when the contact portion 23 is connected to the instrument body 10. An auxiliary spring is provided between the first contact point 40 and the contact portion 23, and the two ends of the auxiliary spring are fixedly connected to the first contact point 40 and the contact portion 23 respectively. This method enables more stable transmission of current or voltage signals.

[0028] In practical use: The instrument body 10 is pen-shaped with an ABS shell and anti-slip texture on the surface. On its left side (near the disposable test head 20), there is a connecting groove adapted to the connecting part 22. A second contact (not separately marked, corresponding to the first contact 40) is fixed in the groove. The second contact is electrically connected to the processor (built into the instrument body 10) via a wire. On the right side, there is a pull bolt 11, which is slidably connected to the instrument body 10. Pulling it moves the impact rod 13 synchronously. A storage spring 12 is sleeved on the outside of the impact rod 13, with one end fixed to the pull bolt 11 and the other end fixed to the inner wall of the instrument body 10, used to store trigger energy. The trigger button 14 is located on the side of the middle of the instrument body 10, with a pressing stroke of 2-3mm. It has a built-in microswitch used to unlock the storage spring 12. The display screen 15 is an OLED screen embedded in the surface of the instrument body 10, which can display the testing progress, results (such as blood glucose level), and unit (mmol / L).

[0029] The outer shell 21 of the disposable testing head 20 is made of medical-grade PP material and is aseptically packaged. The connecting part 22 is a hollow cylindrical shape with external threads on the outside, which match the internal threads of the connecting sleeve 50. The contact part 23 is a disc-shaped part with a diameter larger than that of the connecting part 22. The bottom (the side in contact with the skin) has a blood collection groove (not separately marked, located at the opening of the blood collection channel 31), with a depth of 0.3mm and rounded edges to reduce pressure when in contact with the skin. The silicone sleeve 24 is made of medical-grade silicone, bowl-shaped, with its edges press-fitted against the inner wall of the connecting part 22. The blood collection needle 25 (a 30G stainless steel needle, 2-3mm in length) is fixed to the center of the inner side with medical adhesive.

[0030] The blood-absorbing chamber 30 is a hollow cavity within the contact portion 23, with a volume of 0.5-1 μL. Its top fits snugly against the bottom of the silicone sleeve 24 to form a closed space. The blood collection channel 31 is a fine hole penetrating the contact portion 23, with an inner diameter of 0.2 mm. Its upper end connects to the blood-absorbing chamber 30, and its lower end connects to the blood-gathering groove. The exhaust channel 32 has an inner diameter of 0.5 mm. One end connects to the upper part of the blood-absorbing chamber 30, and the other end penetrates the side wall of the contact portion 23. The one-way valve 33 inside the channel is a silicone diaphragm type, allowing only gas to be discharged from the blood-absorbing chamber 30 to the outside. The first contact 40 is a copper spring, fixed to the contact surface between the contact portion 23 and the instrument body 10. It is connected to the electrochemical detection electrode (not separately marked, a printed electrode, including a working electrode, a reference electrode, and a counter electrode) on the inner wall of the blood-absorbing chamber 30 via a wire. An auxiliary spring (not separately marked) is provided between the first contact 40 and the contact portion 23 to ensure tight contact with the second contact.

[0031] Connecting sleeve 50: It is a ring structure with two internal threads on the inner wall, which are respectively adapted to the external threads of the connecting groove of the instrument body 10 and the external threads of the connecting part 22. When tightened, it can lock the disposable detection head 20 to the instrument body 10.

[0032] In practical use, during the preparation stage, the user tears open the sterile packaging of the disposable detection head 20, holds the contact part 23, aligns the connecting part 22 with the connecting slot of the instrument body 10, puts on the connecting sleeve 50, and tightens it clockwise (a clicking sound can be heard during tightening, indicating that the first contact 40 and the second contact are connected). At this time, the display screen 15 lights up, indicating that blood collection is ready, and automatically detects the status of the electrochemical detection electrode. If the connection is normal, it displays that the electrode is ready.

[0033] For charging and positioning, the user holds the instrument body 10 with the non-blood collection hand, aligning the blood collection groove of the contact part 23 with the fingertip (usually the pad of the ring finger), and gently presses to ensure close contact between the edge of the groove and the skin. With the other hand, pull the lever 11 to its maximum stroke (approximately 10mm). At this time, the charging spring 12 is compressed and charged, and the locking mechanism (such as a locking spring) inside the instrument body 10 fixes the lever 11. The display screen 15 shows "ready," and the user presses the trigger button to collect blood.

[0034] During the blood collection and testing phase, the user presses the trigger button 14, unlocking the locking mechanism and releasing the storage spring 12. This pushes the impact rod 13 to move rapidly to the left (at a speed of approximately 1 m / s), impacting the silicone sleeve 24 and causing it to deform instantly (the deformation amount is approximately 1 mm). The blood collection needle 25 inside the silicone sleeve 24 then protrudes through the blood collection channel 31, piercing the skin (the puncture depth is finely adjusted by the screw-in depth of the connecting part 22, and controlled by the tightness of the connecting sleeve 50). Simultaneously, the deformed silicone sleeve 24 compresses the blood suction chamber 30, and the internal gas is rapidly discharged through the exhaust channel 32 and the one-way valve 33 (the exhaust volume is approximately 0.3 μL).

[0035] The impact rod 13 retracts under the restoring force of the storage spring 12, and the silicone sleeve 24 elastically returns to its original shape. A negative pressure (approximately -5 kPa) is formed inside the blood-absorbing chamber 30, drawing blood from the fingertip into the blood-absorbing chamber 30 through the blood-gathering groove and blood collection channel 31 (blood absorption time is approximately 1-2 seconds). After the blood enters the blood-absorbing chamber 30, it immediately comes into contact with the electrochemical detection electrode. The electrode undergoes an oxidation-reduction reaction to generate a current signal. The signal is transmitted to the processor via the first contact 40 and the second contact. The processor completes signal analysis (such as calculating glucose concentration) within 3 seconds and displays the detection result (e.g., 5.2 mmol / L) on the display screen 15, while also displaying the detection time.

[0036] In the final stage, after the test is completed, the user loosens the connecting sleeve 50 counterclockwise and removes the disposable test head 20 (at this time, the blood collection needle 25 has been completely retracted into the blood absorption chamber 30 along with the silicone sleeve 24, with no protrusion), and places it into the dedicated medical waste recycling box. The display screen 15 of the instrument body 10 automatically displays "Test completed, please discard the test head," and automatically shuts down after 3 seconds.

[0037] The deformation-reset motion of the silicone sleeve 24 enables rapid puncture of the blood collection needle 25 (reducing pain) and automatically draws blood in through negative pressure in the enclosed space, requiring no manual intervention. The exhaust channel 32 and one-way valve 33 allow for rapid venting during puncture, preventing gas in the blood suction chamber 30 from hindering the deformation of the silicone sleeve 24 and ensuring effective needle withdrawal. During testing, the one-way valve 33 closes to maintain stable negative pressure and ensure accurate blood collection. The first contact point 40 and auxiliary spring ensure reliable circuit continuity after the disposable test head 20 is installed, preventing test failures due to poor contact. The connecting sleeve 50, through a threaded connection, allows for quick assembly and disassembly of the instrument body 10 and the disposable test head 20, while ensuring connection strength and preventing the test head from detaching during blood collection.

[0038] The above are merely embodiments of the present invention. The invention is not limited to the fields covered by these embodiments. Commonly known structures and characteristics in the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are able to access all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A portable electrochemical blood collection and detection integrated device, characterized in that, include: A reusable instrument body and a disposable detection head; the instrument body includes a mechanical triggering mechanism and a detection circuit, the mechanical triggering mechanism includes a pull-out bolt, a storage spring connected to the bolt, an impact rod driven by the storage spring, and a trigger button for releasing the storage spring; the detection circuit includes a processor for electrochemical signal analysis and a display screen for displaying results. The disposable detection head includes: The outer casing includes a connecting portion and a contact portion. The connecting portion is a hollow cylindrical shape, with one end fixedly connected to the contact portion and the other end detachably connected to the instrument body. A silicone sleeve is fixed inside the connecting part and is correspondingly arranged with the impact rod. A blood collection needle is fixedly connected to the inside of the sleeve. A blood suction chamber is provided inside the contact part. The blood suction chamber is located below the silicone sleeve and forms a closed space with the silicone sleeve. The contact part is provided with a blood collection channel for accommodating the blood collection needle. One end of the blood collection channel is connected to the blood absorption chamber, and the other end of the blood collection channel is connected to the outside. An electrochemical detection electrode is fixed at the connection between the blood absorption chamber and the blood collection channel. The connecting part or contact part is provided with a first contact point, which is electrically connected to the electrochemical electrode. The instrument body is provided with a second contact point, which is electrically connected to the processor. The first contact point and the second contact point are connected when the connecting part is connected to the instrument body.

2. The portable electrochemical blood collection and detection integrated device according to claim 1, characterized in that, The outer side of the connector is provided with an adjustment thread, and the connector is threadedly connected to the instrument body.

3. The portable electrochemical blood collection and detection integrated device according to claim 2, characterized in that, The contact part is provided with an exhaust channel. One end of the exhaust channel is connected to the blood-absorbing chamber, and the other end penetrates the outer wall of the detection head. The channel is provided with a one-way valve that only allows gas to be discharged from the blood-absorbing chamber to the outside.

4. The portable electrochemical blood collection and detection integrated device according to claim 3, characterized in that, The opening of the blood collection channel is provided with a blood-gathering groove for collecting blood, and the inner diameter of the blood collection channel is smaller than the inner diameter of the exhaust channel.

5. A portable electrochemical blood collection and detection integrated device according to claim 4, characterized in that, The outer diameter of the contact part is larger than the outer diameter of the connecting part, and the first contact point is fixed on the contact surface when the contact part is connected to the instrument body.

6. The portable electrochemical blood collection and detection integrated device according to claim 5, characterized in that, An auxiliary spring is provided between the first contact point and the contact portion, and the two ends of the auxiliary spring are fixedly connected to the first contact point and the contact portion, respectively.

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