An automated blood sampling device

Abstract

This invention provides an automated blood sampling device, including a pressure pulse assembly, a puncture needle, a negative pressure blood collection assembly, and a controller; wherein the controller is used to: select the corresponding negative pressure blood collection method by determining the age of the blood collection personnel; detect the systolic blood pressure SBP1 and the vein diameter D1 at the blood collection site before puncture, and calculate the optimal pressure pulse P1; after applying the optimal pressure pulse, detect the vein diameter D2 and compare it with the preset puncture diameter D... X By comparing the values, the pulse pressure method is adjusted, and the systolic blood pressure SBP2 and vascular elastic modulus after pulse pressure are detected to calculate the optimal negative blood collection pressure P2. During puncture and blood collection, the systolic blood pressure SBP3, venous diameter D3, and blood flow velocity V1 are detected in real time. The pulse pressure P3 and negative blood collection pressure P4 are dynamically adjusted, thereby adjusting the optimal blood collection parameters in real time for different populations, ensuring greater safety.

Description

Technical Field

[0001] This invention relates to the field of medical device manufacturing, and more specifically, to an automated blood sampling device. Background Technology

[0002] Current blood collection methods include manual and automated blood collection. Although manual blood collection is less efficient, it is safer and more reliable due to the wide variety of patients and the frequent occurrence of emergencies. Automated blood collection is suitable for batch blood collection. Although it is more efficient, it still has many shortcomings, especially for different groups of people. It cannot make intelligent adjustments during the blood collection process, such as the negative pressure and pulse pressure during blood drawing. It relies entirely on the selection of predetermined parameters before blood collection. However, the predetermined parameters cannot be applied to all groups of people. For example, there are still differences in negative pressure and pulse pressure during blood collection for elderly patients with hypertension.

[0003] Therefore, existing automated blood sampling devices need to be improved to overcome the aforementioned shortcomings. Summary of the Invention

[0004] The main purpose of this application is to provide an automated blood sampling device that can adapt to the optimal pulse pressure and adjust the negative pressure of blood collection according to different groups of people, thus making it more intelligent and safer to use.

[0005] To achieve the above objectives, in a first aspect, this application provides an automated blood sampling device, including a pulse pressure assembly, a puncture needle, a negative pressure blood collection assembly, and a controller; wherein the controller is used for:

[0006] By determining the age of the person collecting blood, the appropriate negative pressure blood collection method is selected;

[0007] Before puncture, the systolic blood pressure SBP1 and the vein diameter D1 at the blood collection site are detected. The controller calculates the optimal pressure pulse P1 based on the detected systolic blood pressure SBP1 and vein diameter D1.

[0008] After the pressure pulse assembly applies the optimal pressure pulse, the vein diameter D2 is measured and compared with the preset puncture diameter D. X By comparison, the controller adjusts the pulse compression method based on the comparison value, detects the systolic blood pressure SBP2 and vascular elastic modulus after pulse compression, and calculates the optimal negative blood sampling pressure P2 based on the detected systolic blood pressure SBP2 and vascular elastic modulus.

[0009] The system performs puncture blood collection and monitors the systolic blood pressure (SBP3), vein diameter (D3), and blood flow rate (V1) in real time during the blood collection process. The controller is used to dynamically adjust the pulse pressure (P3) and negative pressure (P4) during the blood collection process.

[0010] Optionally, the controller is also used to adjust the pressure of the blood vessel during the puncture process.

[0011] Optionally, the formula for calculating the optimal pulse pressure P1 is: Where K 人群1 Correction coefficient for the population.

[0012] Optionally, the formula for calculating the optimal negative pressure P2 for blood drawing is: Where K 人群2 This represents the population coefficient.

[0013] Optionally, the pulse pressure P3 during blood collection can be dynamically adjusted as follows:

[0014] Optionally, the negative pressure P4 during blood collection can be dynamically adjusted as follows:

[0015] Optionally, adjustments to the pulse pressure during the puncture process include adjusting the pulse pressure to 110%-120% P1 before the lancet enters the skin, adjusting the pulse pressure to 60%-80% P1 after the lancet enters the skin, and gradually increasing the pressure to the optimal pulse pressure P1 during the blood collection process.

[0016] Optionally, the pressure pulse assembly includes a first pressure pulse assembly disposed at the proximal end and a second pressure pulse assembly disposed at the distal end. The first pressure pulse assembly includes a first clamping sleeve and a plurality of first pressure pulse airbags that are spliced ​​together on the inner wall of the first clamping sleeve. The second pressure pulse assembly includes a second clamping sleeve and a plurality of second pressure pulse airbags that are spliced ​​together on the inner wall of the second clamping sleeve. The width of the first pressure pulse airbag is greater than the width of the second pressure pulse airbag.

[0017] Optionally, the thickness of the human fat layer is measured during the puncture, and the number of the first and second pressure pulse balloons is adjusted based on the measured fat layer thickness.

[0018] Optionally, the first clamping sleeve is also provided with a heating device and a micro-vibration device.

[0019] The present invention provides an automatic blood sampling device. Compared with the prior art, its advantages are as follows: The controller of the device is used to select the corresponding negative pressure injection mode by judging the age of the blood collection personnel; S2, before puncture, the systolic blood pressure SBP1 and the vein diameter D1 of the blood collection site are detected, and the optimal pressure pulse P1 is calculated based on the detected systolic blood pressure SBP1 and vein diameter D1; S3, after the pressure pulse component applies the optimal pressure pulse, the vein diameter D2 is detected and compared with the preset puncture diameter D. XBy comparing the values, the pulse pressure method is adjusted, and the systolic blood pressure SBP2 and vascular elastic modulus are detected after pulse pressure. The optimal negative blood collection pressure P2 is calculated based on the detected systolic blood pressure SBP2 and vascular elastic modulus. S4, puncture and blood collection: the systolic blood pressure SBP3, the venous diameter D3, and the blood flow velocity V1 during the blood collection process are detected in real time. The pulse pressure P3 and the negative blood collection pressure P4 are dynamically adjusted during the blood collection process. This allows for real-time adjustment of the optimal blood collection parameters for different populations, ensuring greater safety. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0021] Figure 1 This is the control flowchart of the controller in this invention;

[0022] Figure 2 This is a schematic diagram of the first pressure pulse component.

[0023] Among them: 1. First clamping sleeve; 2. First pressure pulse airbag. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0028] In addition, the term "multiple" should mean two or more.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] An automated blood sampling device includes a pulse pressure assembly, a puncture needle, a negative pressure blood collection assembly, and a controller; wherein the controller is used for:

[0031] S1. By determining the age of the blood collection personnel, the corresponding negative pressure method for blood collection is selected. The age of the blood collection personnel can be obtained from the patient's age information in the medical record or blood collection order number. After obtaining the age information, the patients are classified according to the age segments set in the system. For example, 0-6 years old are classified as infants, 6-18 years old as children, 18-60 years old as adults, and 60 years and above as the elderly. For infants, a smaller initial negative pressure is used, such as setting it to half or one-third of the adult standard negative pressure. During the blood collection process, the negative pressure is increased slowly, with each increase not exceeding one-tenth of the adult standard negative pressure. For adults, standard negative pressure is used for stable extraction. For the elderly, the initial negative pressure is slightly lower than the adult standard negative pressure, such as setting the initial negative pressure to two-thirds or three-quarters of the adult standard negative pressure. During the blood collection process, the negative pressure is increased in small and slow increments, with the increase being one-fifteenth or one-twentieth of the adult standard negative pressure.

[0032] S2. Before puncture, measure the systolic blood pressure SBP1 and the vein diameter D1 at the blood collection site, and calculate the optimal pulse pressure P1 based on the measured systolic blood pressure SBP1 and vein diameter D1.

[0033] S3. After the pressure pulse assembly applies the optimal pressure pulse, the vein diameter D2 is detected and compared with the preset puncture diameter D. XComparisons were made, and the pulse compression method was adjusted based on the comparison values. The systolic blood pressure SBP2 and vascular elastic modulus after pulse compression were detected. The optimal negative blood sampling pressure P2 was calculated based on the detected systolic blood pressure SBP2 and vascular elastic modulus.

[0034] S4. Puncture blood collection, real-time monitoring of systolic blood pressure SBP3, venous diameter D3, and blood flow velocity V1 during the blood collection process, and dynamic adjustment of pulse pressure P3 and negative pressure P4 during the blood collection process.

[0035] Systolic blood pressure (SBP1, SBP2, and SBP3) was measured using a finger blood pressure monitor, while venous diameters (D1 and D2) were measured using ultrasound. Although the accuracy of ultrasound is slightly lower than that of angiography, angiography cannot measure venous diameter in real time during blood collection. Finally, blood flow velocity during blood collection was measured using laser Doppler velocimetry or ultrasonic Doppler velocimetry. In addition, the negative pressure blood collection device uses a variable frequency blood pump, and the controller can control the blood collection pressure.

[0036] Preferably, the blood collection process also includes adjusting the pressure during the puncture. This adjustment includes adjusting the pressure to 110%-120% P1 before the needle enters the skin, adjusting it to 60%-80% P1 after the needle enters the skin, and gradually increasing the pressure to the optimal pressure P1 during the blood collection process. It should be noted that increasing the pressure before the needle enters the skin can alleviate the stinging pain during puncture, while promptly reducing and releasing the pressure after puncture allows for negative pressure blood aspiration. Adjusting the pressure to the optimal pressure during aspiration ensures that the blood collection process remains stable.

[0037] Preferably, the formula for calculating the optimal pulse pressure P1 is: Where K 人群1 For population correction coefficients, where K 人群1 In this embodiment, only the age correction factor is used, which is 0.7 for children, 1.0 for adults, and 0.8 for the elderly.

[0038] Preferably, the formula for calculating the optimal negative pressure P2 for blood drawing is: Where K 人群2 K is the population coefficient, where K 人群2 In this embodiment, only the age coefficient is used, with 0.7 for children, 1.0 for adults, and 0.8 for the elderly.

[0039] Preferably, the pulse pressure P3 during blood collection is dynamically adjusted as follows: Where ΔSBP=SBP3-SBP2.

[0040] Preferably, the negative pressure P4 during blood collection is dynamically adjusted as follows: Where P I The standard negative pressure for adults during negative pressure blood collection is set to -240 mmHg.

[0041] Preferably, such as Figure 2 As shown, the pressure pulse assembly includes a first pressure pulse assembly disposed proximally and a second pressure pulse assembly disposed distally. The first pressure pulse assembly includes a first clamping sleeve 1 and a plurality of first pressure pulse airbags 2 interlocked on the inner wall of the first clamping sleeve 1. The second pressure pulse assembly includes a second clamping sleeve and a plurality of second pressure pulse airbags interlocked on the inner wall of the second clamping sleeve. The width of the first pressure pulse airbag 2 is greater than the width of the second pressure pulse airbags. The width of a single first pressure pulse airbag 2 is 1.5 cm, while the width of a single second pressure pulse airbag is 1 cm. Figure 2 This is a schematic diagram of the first pressure pulse assembly. The second pressure pulse assembly has a similar structure to the first pressure pulse assembly, except that the size of the pressure pulse airbag is different.

[0042] It should be noted that both the first and second clamping sleeves use an airbag structure, differing only in size. During blood collection, the patient's arm passes through the first and second clamping sleeves sequentially, after which both are inflated to position the arm. The air pressure inside the first and second clamping sleeves is much lower than the air pressure inside the pulse-pressure airbag, thus not affecting pulse pressure. When applying pulse pressure, the number of first and second pulse-pressure airbags is selected based on the age of the patient. For infants and young children, one first and one second pulse-pressure airbag are used. For adults and the elderly, two first and two second pulse-pressure airbags can be used. For obese individuals, a wide pulse-pressure band is automatically used to facilitate puncture. During the puncture process, the patient... The thickness of the fat layer is measured, and the number of first and second pressure cuffs is adjusted based on the measured fat layer thickness. For example, for adults, two first and second pressure cuffs are selected for the general population. If the fat thickness of the blood sampler exceeds the preset value, one more first pressure cuff is added, and two more second pressure cuffs are added at the same time. That is, the width of the proximal pressure cuff becomes 4.5cm, and the width of the distal pressure cuff becomes 4cm. The main function of the proximal end is to block venous return. The wider pressure cuff can apply pressure evenly over a larger area, allowing the vein to fill better and reducing damage to local tissues. In addition to assisting venous filling, the distal pressure cuff can also fix the needle. The wider pressure cuff provides more stable fixation and reduces the risk of needle movement or slippage out of the blood vessel.

[0043] To make the blood vessels more prominent during the puncture process, making it easier for the automatic blood collection device to perform the puncture without the need for ultrasound guidance, thus simplifying the structure of the automatic blood collection device and reducing its cost, the first clamping sleeve 1 is also equipped with a heating device and a micro-vibration device. Although increasing the pulse pressure during the blood collection process can make the blood vessels more prominent, excessively increasing the pulse pressure can affect human health. Therefore, local heating can accelerate blood circulation, make the blood vessels more prominent, and lower blood pressure. In addition, micro-vibration can alleviate the pain of children during puncture and prevent them from making stressful actions.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An automated blood sampling device, characterized in that, It includes a pressure pulse assembly, a puncture needle, a negative pressure blood collection assembly, and a controller; wherein the controller is used for: By determining the age of the person collecting blood, the appropriate negative pressure blood collection method is selected; Before puncture, the systolic blood pressure SBP1 and the vein diameter D1 at the blood collection site are detected. The controller calculates the optimal pressure pulse P1 based on the detected systolic blood pressure SBP1 and vein diameter D1. After the pressure pulse assembly applies the optimal pressure pulse, the vein diameter D2 is measured and compared with the preset puncture diameter D. X By comparison, the controller adjusts the pulse compression method based on the comparison value, detects the systolic blood pressure SBP2 and vascular elastic modulus after pulse compression, and calculates the optimal negative blood sampling pressure P2 based on the detected systolic blood pressure SBP2 and vascular elastic modulus. The puncture blood collection process includes real-time monitoring of systolic blood pressure SBP3, venous diameter D3, and blood flow velocity V1. The controller is used to dynamically adjust the pulse pressure P3 and negative pressure P4 during the blood collection process. The formula for calculating the optimal pulse pressure P1 is: P1 = ,in Adjustment coefficient for the population; The formula for calculating the optimal negative pressure P2 for blood drawing is: P2 = ( ,in Population coefficient; The pulse pressure P3 during blood collection is dynamically adjusted as follows: P3 = P1 - ; The negative pressure P4 during blood collection is dynamically adjusted as follows: P4 = P2.

2. The automatic blood sampling device as described in claim 1, characterized in that: The controller is also used to adjust the pressure of the blood vessel during the puncture process.

3. The automatic blood sampling device as described in claim 2, characterized in that: The adjustments made to the pulse pressure during the puncture process include adjusting the pulse pressure to 110%-120%P1 before the blood collection needle enters the skin, adjusting the pulse pressure to 60%-80%P1 after the blood collection needle enters the skin, and gradually increasing the pressure to the optimal pulse pressure P1 during the blood collection process.

4. The automatic blood collection and injection device as described in claim 1, characterized in that: The pressure pulse assembly includes a first pressure pulse assembly disposed at the proximal end and a second pressure pulse assembly disposed at the distal end. The first pressure pulse assembly includes a first clamping sleeve and a plurality of first pressure pulse airbags that are spliced ​​together on the inner wall of the first clamping sleeve. The second pressure pulse assembly includes a second clamping sleeve and a plurality of second pressure pulse airbags that are spliced ​​together on the inner wall of the second clamping sleeve. The width of the first pressure pulse airbag is greater than the width of the second pressure pulse airbag.

5. An automatic blood sampling device as described in claim 4, characterized in that: During the puncture, the thickness of the human fat layer is measured, and the number of the first and second pressure pulse balloons is adjusted based on the measured fat layer thickness.

6. An automatic blood sampling device as described in claim 4, characterized in that: The first clamping sleeve is also equipped with a heating device and a micro-vibration device.

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