A hemodialysis wound bleeding alarm device based on a biosensor

Abstract

The present application relates to hemodialysis wound bleeding alarm technical field, specifically, it relates to a kind of hemodialysis wound bleeding alarm device based on biosensor, it includes installation box and the fixing band being arranged below installation box, sensor alarm device is arranged on installation box, disinfection component, pressing component, air cooling component and ice compress component are arranged in installation box;Through structure integration and function synergy, bleeding monitoring, dynamic disinfection, accurate ice compress and intelligent alarm are organically combined, effectively make up the deficiencies, such as the rough management of existing technology to long-term bedridden hemodialysis patient puncture point, infection and hematoma prevention and control lag, significantly improve the safety of hemodialysis passage nursing.

Description

Technical Field

[0001] This invention relates to the field of hemodialysis wound bleeding alarm technology, and more specifically, to a hemodialysis wound bleeding alarm device based on a biosensor. Background Technology

[0002] A search revealed that the puncture site bleeding alarm device disclosed in CN211749559U includes a device body with a limiting slot at the center of its surface, and a cotton ball holder inside the limiting slot. This invention incorporates a cotton ball holder, elastic clamping components, a control chip, a humidity sensor, and a miniature alarm. When used to alarm for bleeding at a patient's puncture site, the multiple elastic clamping components inside the cotton ball holder effectively limit the cotton ball's movement, preventing it from falling and enhancing its stability and accuracy. When bleeding occurs, blood is drawn into the cotton ball, which is detected by the humidity sensor. The humidity sensor then transmits the signal to the control chip, which activates the miniature alarm to sound an alarm, alerting the patient or medical staff. Timely detection of bleeding helps reduce blood loss.

[0003] The aforementioned patents still have shortcomings in practical application. In current clinical practice, for patients with limited mobility, long-term bed rest, and regular hemodialysis, the arteriovenous fistula puncture site often requires a long-term indwelling needle for connection to the dialysis device. To ensure needle stability, medical fixation dressings or bandages are typically used for continuous fixation. However, this fixation method often makes it difficult to detect minor bleeding at the puncture site in a timely manner. Although small amounts of bleeding have limited impact on the patient in the short term, if left undetected and untreated for a long time, it can easily lead to local infection. In addition, these patients often have poor vascular conditions, making them prone to hematoma formation during puncture or dialysis, often requiring local ice application to reduce swelling and inflammation. These situations highlight the significant deficiencies in current puncture site management, bleeding monitoring, and complication prevention.

[0004] Based on this, the present invention discloses a hemodialysis wound bleeding alarm device based on a biosensor. Summary of the Invention

[0005] To address the issues raised in the background art regarding the inadequacy of puncture site management and complication prevention in patients who are bedridden for extended periods and require frequent hemodialysis, where the arteriovenous fistula puncture site often requires continuous indwelling needles and is secured with medical bandages, making it difficult to detect minor bleeding in a timely manner and easily leading to local infection, coupled with poor vascular conditions that easily form hematomas, often requiring ice packs for relief, this invention provides a hemodialysis wound bleeding alarm device based on a biosensor. It includes an installation box and a fixing strap located below the installation box. The installation box is equipped with a sensor alarm device, and the installation box contains a disinfection component, a pressing component, an air-cooling component, and an ice pack component. In order to disinfect and fix the puncture site, and to solve the drawback of the traditional method of not being able to easily change alcohol swabs at the puncture site, and to facilitate the detection of local infection or bleeding at the puncture site, this invention adopts a detachable pressing structure. An alcohol swab can be placed at the bottom of the pressing structure to press the puncture site, and the probe needle can be placed inside the alcohol swab. In this way, local infection can be detected quickly, and at the same time, the alcohol swab has an absorption effect, which can amplify the slight bleeding, making it easier for the probe needle inserted inside the alcohol swab to detect. As a further improvement to this technical solution, the pressing component includes a mounting sleeve disposed within a mounting box, a telescopic cylinder slidably disposed within the mounting sleeve, and an alcohol swab detachably disposed at the bottom of the telescopic cylinder; a mounting cover is fixedly disposed at the top of the telescopic cylinder, several ventilation slots are circumferentially opened on the telescopic cylinder, and several limiting blocks are circumferentially fixed on the inner wall of the bottom of the telescopic cylinder; secondly, two connecting wires are disposed on the smart sensor, two probes are disposed inside the telescopic cylinder, the bottom of the probes extends beyond the bottom of the telescopic cylinder, the top of the probes is fixed inside the top of the mounting cover, and the probes are electrically connected to the smart sensor through corresponding connecting wires.

[0006] Based on this, since many patients have poor vascular conditions, which easily leads to hematoma, and ordinary patients are also prone to hematoma around the puncture site during long-term hemodialysis, and ice application can usually relieve hematoma. In order to achieve an ice application effect near the puncture site, this invention uses alcohol, which has strong volatility. In addition, the area around the puncture site usually needs to be disinfected with alcohol, and the disinfection effect will be reduced once the alcohol evaporates. Therefore, by frequently spraying alcohol spray near the puncture site, and then using wind to accelerate the evaporation of alcohol, the effects of ice application and increased disinfection are achieved. As a further improvement to this technical solution, the air-cooling component includes a fan installed inside the mounting box. A three-way pipe is provided at the air outlet of the fan. One end of the three-way pipe is located at the air inlet of the ice pack component, and the other end of the three-way pipe flows through the liquid outlet of the disinfection component and is positioned directly opposite the air inlet of the ice pack component. Secondly, the ice pack component includes an air box installed at the bottom of the mounting box. The ice pack component also includes a mounting plate fixed to the bottom of the mounting box. The air box is fixed on the axis of the mounting plate. An arc-shaped soft pad is fixed at the bottom of the mounting plate below the mounting box. The bottom of the air box is open, and the bottom of the mounting plate and the soft pad have openings that match the bottom of the air box. An air outlet is provided at the end of the air box away from the three-way pipe. In addition, the air outlet of the fan is fixedly provided with a conical air-gathering pipe. The fan is connected to a three-way pipe through the air-gathering pipe. One end of the three-way pipe is connected to the air inlet of the air box, and the other end of the three-way pipe is connected to a spray pipe. The inner diameter of the spray pipe is smaller than the inner diameter of the three-way pipe. The end of the spray pipe away from the three-way pipe is set opposite to the air inlet of the air box, and a nozzle is set on the end of the spray pipe inside the air box. In addition, the disinfection component includes a box cover fixed inside the installation box, a liquid storage tank is provided on the top of the box cover at the top of the installation box, a suction tube is provided at the bottom of the box cover, and the end of the suction tube away from the box cover is connected to the spray pipe; through openings are provided on both sides of the installation sleeve, the position and size of the openings are adapted to the air box, and grooves adapted to the installation sleeve are provided on the air box, the installation plate and the soft pad.

[0007] In another approach, since alcohol is highly volatile, in order to increase the amount of alcohol sprayed onto the alcohol cotton, i.e. the puncture point, this invention adopts the idea of ​​optimizing the air duct so that the airflow in the air box is redirected to the alcohol cotton. As a further improvement to this technical solution, several guide plates are provided on the inner wall of the top of the wind box, at an angle above the opening on the side away from the three-way pipe. The guide plates have an arc-shaped structure and are set at an inclination. The angle formed by the guide plates and the top of the wind box is directly opposite the opening. The size of the several guide plates gradually increases with the distance from the opening.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this biosensor-based hemodialysis wound bleeding alarm device, a detachable pressing structure is set up with an alcohol swab and a built-in probe at its bottom. While conforming to the puncture point, the structure utilizes the absorption and amplification effect of the alcohol swab on minor bleeding, enabling the probe to more sensitively detect early bleeding or local infection signals, and alarm in real time through the biosensor. This facilitates early detection and intervention of complications at the puncture site, thereby effectively reducing the risk of local tissue damage caused by bleeding retention or delayed infection.

[0009] 2. This biosensor-based hemodialysis wound bleeding alarm device integrates a cooling component, a disinfection component, and an ice pack structure. It utilizes a fan to accelerate airflow and, combined with the Bernoulli effect, atomizes the alcohol in the reservoir and directs it to the blood vessel area around the puncture point. The alcohol achieves efficient disinfection and local cooling simultaneously during continuous spraying and rapid evaporation. This helps to maintain the cleanliness of the puncture point while providing a dynamic ice pack effect, thereby alleviating hematoma problems caused by poor blood vessel conditions or prolonged dialysis.

[0010] 3. In this biosensor-based hemodialysis wound bleeding alarm device, by setting a multi-level gradient arc-shaped guide plate at the end of the air duct, part of the alcohol-containing airflow is guided to swirl back to the alcohol cotton area at the bottom of the pressing structure, thereby enhancing the local disinfection and cooling dosage at the puncture point; this is beneficial to improve the protection strength of key areas, while also taking into account the overall coverage along the blood vessel direction, thereby optimizing the local treatment effect without interfering with the efficiency of the main air duct. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the mounting box of the present invention; Figure 3 This is a schematic diagram of the internal structure of the mounting box of the present invention; Figure 4 This is a side sectional view of the structure of the bellows of the present invention; Figure 5 This is a schematic diagram of the state of the guide plate of the present invention; Figure 6 This is a schematic diagram of the air-cooled assembly of the present invention; Figure 7 This is a schematic diagram of the pressing component of the present invention; Figure 8 This is a cross-sectional view of the mounting sleeve of the present invention.

[0012] The meanings of the labels in the diagram are as follows: 1. Mounting box; 2. Fixing strap; 3. Sensor alarm device; 4. Disinfection assembly; 5. Pressing assembly; 6. Air-cooling assembly; 7. Ice pack assembly; 31. Smart sensor; 32. Connecting cable; 33. Probe; 41. Box lid; 42. Liquid storage tank; 43. Suction tube; 51. Installation sleeve; 52. Installation cover; 53. Through port; 54. Telescopic cylinder; 55. Ventilation slot; 56. Limiting block; 61. Fan; 62. Concentrator duct; 63. T-joint; 64. Spray nozzle; 65. Nozzle; 71. Bellows; 72. Mounting plate; 73. Pad; 74. Air outlet; 75. Deflector. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Patients who are bedridden for a long time and require frequent hemodialysis often need to have a needle continuously inserted at the arteriovenous fistula puncture site and be fixed with a medical bandage. This makes it difficult to detect minor bleeding in time, which can easily lead to local infection. In addition, poor vascular conditions can easily lead to hematoma formation, and ice packs are often needed to relieve the pain. This highlights the inadequacy of puncture site management and complication prevention.

[0015] Therefore, this invention provides a hemodialysis wound bleeding alarm device based on a biosensor, see [link to relevant documentation]. Figures 1-2 As shown, it includes an installation box 1 and a fixing strap 2 located below the installation box 1. The installation box 1 is equipped with a sensor alarm device 3. The installation box 1 is equipped with a disinfection component 4, a pressing component 5, a wind-cooling component 6, and an ice pack component 7. During operation, the doctor first inserts the needle into the patient's puncture site and then secures it. An alcohol swab is placed at the bottom of the pressing component 5, and the mounting box 1 is fitted onto the patient's arm using the fixing strap 2. The bottom of the pressing component 5 is positioned directly opposite the puncture site, thus placing the ice pack component 7 around the blood vessels near the puncture site. The needle is also secured to the bottom of the mounting box 1. The air-cooling component 6 is then activated, causing air to blow along the blood vessels around the puncture site from inside the ice pack component 7, while simultaneously spraying alcohol. The volatile nature of the alcohol carries away heat, further enhancing the cooling effect. The continuous spraying and evaporation of alcohol also improves disinfection and prevents local infection. Furthermore, the sensor alarm device 3 detects the puncture site, triggering an alarm if a local infection occurs.

[0016] It should be noted that the sensor alarm device 3 includes a smart sensor 31 installed on the top of the mounting box 1. The smart sensor 31 in this invention is a biosensor, or a similar smart sensor. The biosensor can quickly detect local infections, and the operation of the biosensor can be broken down into two core steps: 1. Specific identification, target locking Sensors use biorecognition elements that bind only to specific target molecular analytes. Common recognition elements include enzymes, antibodies, and ion carriers.

[0017] 2. Signal conversion and result reading. Once the target molecule is captured by the recognition element, biochemical reactions such as enzymatic reactions and antigen-antibody binding occur, producing minute changes in light, heat, electricity, or mass. Subsequently, the transducer amplifies these chemical / biological signals and converts them into easily measurable electrical signals.

[0018] The intelligent sensor 31 detects local infection at the puncture site and reacts quickly. The purpose of this invention is to reduce local infection through ice application, alcohol spraying and evaporation. Even if infection occurs, the intelligent sensor 31 can respond quickly.

[0019] For details, see Figures 2-4 and Figures 7-8 As shown, in order to disinfect and fix the puncture site, and to overcome the drawback of the inconvenience of changing alcohol swabs at the puncture site in traditional methods, and to facilitate the detection of local infection or bleeding at the puncture site, this invention adopts a detachable pressing structure. An alcohol swab can be placed at the bottom of the pressing structure to press the puncture site, while the probe needle is placed inside the alcohol swab. This allows for rapid detection of local infection, and the alcohol swab's absorbent effect amplifies minor bleeding, making it easier for the probe needle inserted inside the swab to detect. Specifically, the pressing component 5 includes components housed within the mounting box 1. An installation sleeve 51 is installed, and a telescopic cylinder 54 is slidably installed inside the installation sleeve 51. An alcohol swab is detachably installed at the bottom of the telescopic cylinder 54. An installation cover 52 is fixedly installed at the top of the telescopic cylinder 54. Several ventilation slots 55 are circumferentially opened on the telescopic cylinder 54. Several limiting blocks 56 are circumferentially fixed on the inner wall of the bottom of the telescopic cylinder 54. Secondly, two connecting wires 32 are provided on the smart sensor 31. Two probes 33 are provided inside the telescopic cylinder 54. The bottom of the probes 33 extends beyond the bottom of the telescopic cylinder 54. The top of the probes 33 is fixed inside the top of the installation cover 52. The probes 33 are electrically connected to the smart sensor 31 through the corresponding connecting wires 32.

[0020] During operation, the telescopic cylinder 54 is first pulled out of the mounting sleeve 51 through the mounting cap 52. Then, an alcohol swab is inserted into the bottom of the telescopic cylinder 54. Since the bottom of the telescopic cylinder 54 has several limiting blocks 56, the alcohol swab can be fixed in place, and the probe 33 can be inserted into the alcohol swab. After that, the telescopic cylinder 54 is reinserted into the mounting sleeve 51. The insertion depth can be adjusted according to the size of the patient's arm, because the telescopic cylinder 54 and the mounting sleeve 51 are slidably connected and have a damping effect. For pressing the needle position, this damping is sufficient to achieve a stable effect. When the alcohol swab is pressed against the puncture point by the telescopic cylinder 54, if slight bleeding occurs, the alcohol swab has an absorption effect, which can quickly amplify the slight bleeding, making it easy for the probe 33 to detect. Moreover, if there is local infection due to bleeding near the probe 33 or other reasons, the probe 33 inserted into the alcohol swab can also quickly react and trigger an alarm.

[0021] Further, see Figures 2-4 and Figure 6 As shown, many patients have poor vascular conditions, which easily leads to hematoma. Even ordinary patients are prone to hematoma around the puncture site during prolonged hemodialysis. Ice packs are generally used to relieve hematoma. To achieve an ice pack effect around the puncture site, this invention utilizes alcohol, which is highly volatile. Since alcohol is generally needed for disinfection around the puncture site, and its disinfection effect decreases once it evaporates, this invention achieves both ice pack and enhanced disinfection by frequently spraying alcohol around the puncture site and using wind power to accelerate alcohol evaporation. Specifically, the air-cooled component 6 includes a fan 61 housed in the mounting box 1, and a three-way pipe 63 is provided at the air outlet of the fan 61. One end of the three-way pipe 63 is set at the air inlet of the ice pack assembly 7, and the other end of the three-way pipe 63 flows through the liquid outlet of the disinfection assembly 4 and is set directly opposite the air inlet of the ice pack assembly 7; secondly, the ice pack assembly 7 includes an air box 71 set at the bottom of the mounting box 1, and the ice pack assembly 7 also includes a mounting plate 72 fixed at the bottom of the mounting box 1. The air box 71 is fixed on the axis of the mounting plate 72, and the bottom of the mounting plate 72 is fixed with an arc-shaped soft pad 73 below the mounting box 1; the bottom of the air box 71 is open, and the bottom of the mounting plate 72 and the soft pad 73 have openings that are compatible with the bottom of the air box 71. The end of the air box 71 away from the three-way pipe 63 has an air outlet 74. In addition, the air outlet end of the fan 61 is fixedly provided with a conical air-gathering pipe 62. The fan 61 is connected to a three-way pipe 63 through the air-gathering pipe 62. One end of the three-way pipe 63 is connected to the air inlet end of the air box 71, and the other end of the three-way pipe 63 is connected to a nozzle 64. The inner diameter of the nozzle 64 is smaller than the inner diameter of the three-way pipe 63. The end of the nozzle 64 away from the three-way pipe 63 is set directly opposite the air inlet end of the air box 71, and a nozzle 65 is set on the end of the nozzle 64 located inside the air box 71. In addition, the disinfection component 4 includes a box cover 41 fixed inside the installation box 1. A liquid storage tank 42 is provided on the top of the box cover 41 at the top of the installation box 1. A suction pipe 43 is provided at the bottom of the box cover 41. The end of the suction pipe 43 away from the box cover 41 is connected to the spray pipe 64. The mounting sleeve 51 has through openings 53 on both sides. The position and size of the through openings 53 are adapted to the air box 71. The air box 71, the mounting plate 72 and the soft pad 73 have slots adapted to the mounting sleeve 51.

[0022] During operation, the fan 61 outputs airflow, and according to Bernoulli's principle, the airflow velocity at the narrow end of the concentrator 62 increases due to the conical structure of the concentrator 62. This results in a faster airflow velocity into the three-way pipe 63. The airflow from the three-way pipe 63 then enters the nozzle 64 at one end. Since the inner diameter of the nozzle 64 is smaller than that of the three-way pipe 63, the airflow velocity entering the nozzle 64 increases further. Because the nozzle 64 is connected to the lid 41 via the suction pipe 43, according to Bernoulli's principle, the alcohol inside the lid 41 is drawn into the nozzle 64 through the suction pipe 43, and then sprayed through the nozzle 65 towards the air inlet of the bellows 71. The other end of the three-way pipe 63 is located at the air inlet of the bellows 71, thus blowing the atomized alcohol into the bellows 71. The sleeve 51 has openings 53 on both sides, and the telescopic cylinder 54 has several ventilation slots 55, so the alcohol spray will continuously advance along the bellows 71. The bellows 71 is located near the puncture point and has a longitudinal length, so it can cover the area near the blood vessel. The alcohol spray will diffusely cover the blood vessel near the puncture point. The air blown out by the three-way tube 63 accelerates the flow rate and evaporation of the alcohol spray. The alcohol diffusion can have a disinfection effect. As the alcohol is continuously sprayed in and blown out, the frequency of replacing the disinfectant alcohol increases, thus increasing the disinfection effect. The alcohol evaporation will take away a lot of heat, so that the area near the puncture point and blood vessel will have an ice-cold effect.

[0023] Furthermore, see Figure 4 and Figure 5 As shown, due to the high volatility of alcohol, in order to increase the dosage of alcohol sprayed onto the alcohol cotton, i.e., the puncture point, this invention adopts the idea of ​​optimizing the air duct so that part of the airflow inside the air box 71 is redirected to the alcohol cotton. Specifically, on the inner wall of the top of the air box 71, several guide plates 75 are provided obliquely above the opening 53 on the side away from the three-way pipe 63. The guide plates 75 have an arc-shaped structure and are inclined. The angle formed by the guide plates 75 and the top of the air box 71 is directly opposite the opening 53. The size of the guide plates 75 gradually increases with the distance from the opening 53.

[0024] During operation, as the alcohol spray travels within the bellows 71, it moves along... Figure 4Moving in the indicated direction, when the alcohol spray on the upper part of the bellows 71 encounters the guide plate 75, due to the design of the guide plate 75 angled towards the bottom of the telescopic cylinder 54, some of the alcohol spray will swirl back into the opening 53 and soak into the alcohol cotton, increasing the disinfection and ice application effect at the puncture point. With several guide plates 75, each gradually increasing in size, any alcohol spray escaping from a guide plate 75 near the opening 53 will be intercepted and swirled by the next larger guide plate 75. This gradual process results in a greater swirling airflow compared to a single guide plate 75. Furthermore, the arrangement of multiple gradually increasing guide plates 75 along the depth of the bellows 71 minimizes the impact on the original airflow path of the bellows 71. This achieves both increased ice application at the puncture point and minimal impact on other locations along the blood vessel. If local infection or minor bleeding occurs, the intelligent sensor 31 will alarm, allowing the telescopic cylinder 54 to be removed for alcohol cotton replacement or further remedial measures to be taken.

[0025] In summary, this approach effectively addresses the shortcomings in puncture site management and complication prevention for patients who are bedridden for extended periods and require frequent hemodialysis. These patients often require continuous indwelling needles at the arteriovenous fistula puncture site, secured with medical bandages, leading to difficulty in detecting minor bleeding, increasing the risk of local infection, and increasing the likelihood of hematoma formation due to poor vascular conditions. Furthermore, the reliance on ice packs for relief highlights the inadequacy of puncture site management and complication control.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A biosensor-based hemodialysis wound bleeding alarm device, comprising a mounting box (1) and a fixing strap (2) disposed below the mounting box (1), wherein a sensor alarm device (3) is disposed on the mounting box (1), characterized in that: The installation box (1) contains a disinfection component (4), a pressing component (5), a wind-cooling component (6), and an ice pack component (7). The pressing component (5) includes a mounting sleeve (51) set in the mounting box (1), a telescopic cylinder (54) is slidably set in the mounting sleeve (51), and through openings (53) are provided on both sides of the mounting sleeve (51). An alcohol cotton is detachably set at the bottom of the telescopic cylinder (54). The air-cooled component (6) includes a fan (61) installed in the mounting box (1). A three-way pipe (63) is provided at the air outlet of the fan (61). One end of the three-way pipe (63) is located at the air inlet of the ice pack component (7). The other end of the three-way pipe (63) flows through the liquid outlet of the disinfection component (4) and is located directly opposite the air inlet of the ice pack component (7). The ice pack assembly (7) includes a bellows (71) located at the bottom of the mounting box (1).

2. The hemodialysis wound bleeding alarm device based on a biosensor according to claim 1, characterized in that: The ice pack assembly (7) also includes an installation plate (72) fixed to the bottom of the installation box (1), the air box (71) is fixed on the axis of the installation plate (72), and the bottom of the installation plate (72) is fixed with an arc-shaped soft pad (73) below the installation box (1).

3. The hemodialysis wound bleeding alarm device based on a biosensor according to claim 2, characterized in that: The bottom of the bellows (71) is open, and the bottom of the mounting plate (72) and the pad (73) are provided with openings that are compatible with the bottom of the bellows (71). An air outlet (74) is provided at the end of the bellows (71) away from the three-way pipe (63).

4. The hemodialysis wound bleeding alarm device based on a biosensor according to claim 3, characterized in that: The air outlet of the fan (61) is fixedly provided with a conical air-gathering pipe (62). The fan (61) is connected to a three-way pipe (63) through the air-gathering pipe (62). One end of the three-way pipe (63) is connected to the air inlet of the air box (71), and the other end of the three-way pipe (63) is connected to a nozzle (64). The inner diameter of the nozzle (64) is smaller than the inner diameter of the three-way pipe (63).

5. The hemodialysis wound bleeding alarm device based on a biosensor according to claim 4, characterized in that: The nozzle (64) is positioned opposite the air inlet of the air box (71) at one end away from the three-way pipe (63), and a nozzle (65) is provided on the end of the nozzle (64) inside the air box (71).

6. The hemodialysis wound bleeding alarm device based on a biosensor according to claim 5, characterized in that: The disinfection component (4) includes a box cover (41) fixed inside the installation box (1). The top of the box cover (41) is provided with a liquid storage tank (42) located at the top of the installation box (1). The bottom of the box cover (41) is provided with a suction tube (43). The end of the suction tube (43) away from the box cover (41) is connected to the spray pipe (64).

7. The hemodialysis wound bleeding alarm device based on a biosensor according to claim 5, characterized in that: The opening (53) is positioned and sized to match the bellows (71), and the bellows (71), mounting plate (72) and pad (73) are provided with slots that match the mounting sleeve (51).

8. The hemodialysis wound bleeding alarm device based on a biosensor according to claim 7, characterized in that: The top of the telescopic cylinder (54) is fixedly provided with an installation cover (52), and a number of ventilation slots (55) are opened in the circumferential direction on the telescopic cylinder (54). A number of limiting blocks (56) are fixed in the circumferential direction on the inner wall of the bottom of the telescopic cylinder (54).

9. The hemodialysis wound bleeding alarm device based on a biosensor according to claim 7, characterized in that: On the inner top wall of the bellows (71), several guide plates (75) are provided at an angle above the opening (53) on the side away from the three-way pipe (63). The guide plates (75) have an arc-shaped structure and are set at an inclination. The angle formed by the guide plates (75) and the top of the bellows (71) is directly opposite the opening (53). The size of the several guide plates (75) gradually increases with the distance from the opening (53).

10. The hemodialysis wound bleeding alarm device based on a biosensor according to claim 8, characterized in that: The sensor alarm device (3) includes a smart sensor (31) set on the top of the mounting box (1). The smart sensor (31) is provided with two connecting wires (32). The telescopic cylinder (54) is provided with two probes (33). The bottom of the probes (33) extends beyond the bottom of the telescopic cylinder (54). The top of the probes (33) is fixed inside the top of the mounting cover (52). The probes (33) are electrically connected to the smart sensor (31) through the corresponding connecting wires (32).

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