Automatic blood sampling and sample injection device

Abstract

The invention provides an automatic blood sampling and sample injection device. The automatic blood sampling and sample injection device comprises a pulse pressing assembly, a puncture needle head, a negative pressure blood drawing assembly and a controller, wherein the controller is used for selecting a corresponding blood sampling negative pressure propulsion mode by judging the age of a blood sampling person; the systolic pressure SBP1 and the vein diameter D1 of the blood sampling part are detected before puncture, and the optimal tourniquet pressure P1 is calculated; after the optimal tourniquet pressure is applied, the diameter D2 of the vein blood vessel is detected and compared with the preset puncture diameter DX, the tourniquet mode is adjusted based on the comparison value, the systolic pressure SBP2 and the blood vessel elasticity modulus after tourniquet are detected, and the optimal blood drawing negative pressure P2 is calculated; the method comprises the following steps of: puncturing and sampling blood, detecting systolic pressure SBP3 in the blood sampling process, vein diameter D3 in the blood sampling process and blood flow velocity V1 in the blood sampling process in real time, and dynamically adjusting pulse pressing pressure P3 and blood drawing negative pressure P4 in the blood sampling process, so that optimal blood sampling parameters are adjusted in real time for different crowds, and the safety is better guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of medical device processing, and more particularly, to an automatic blood sampling and injection device. Background Art

[0002] Current blood collection methods include manual blood collection and automatic blood collection. Although manual blood collection is inefficient, due to the diverse types of patient populations and the relatively high frequency of emergencies, manual blood collection is safer and more reliable. Automatic blood collection is suitable for batch blood collection. Although it is highly efficient, it still has many deficiencies. Especially for different populations, it cannot be intelligently adjusted during the blood collection process. For example, the negative pressure during blood drawing and the pressure on the vein are completely dependent on the pre-set parameters selected before blood collection, and these pre-set parameters are not applicable to all populations. For example, in elderly patients, especially those with hypertension, there are still differences in the negative pressure during blood drawing and the pressure on the vein during blood collection.

[0003] In view of this, it is necessary to improve the existing automatic blood sampling and injection device to overcome the above-mentioned defects. Summary of the Invention

[0004] The main object of the present application is to provide an automatic blood sampling and injection device that can adapt the optimal pressure on the vein and adjust the negative pressure during blood drawing according to different populations, thereby being more intelligent and safer to use.

[0005] To achieve the above object, in a first aspect, the present application provides an automatic blood sampling and injection device, including a vein pressure component, a puncture needle, a negative pressure blood drawing component, and a controller; wherein the controller is configured to: Select a corresponding negative pressure blood drawing advancement method by judging the age of the blood collection person; Detect the systolic blood pressure SBP1 and the venous diameter D1 of the blood collection site before puncture, and the controller calculates the optimal pressure on the vein P1 based on the detected systolic blood pressure SBP1 and venous diameter D1; After the vein pressure component applies the optimal pressure on the vein, detect the venous blood vessel diameter D2 and compare it with the preset puncture diameter D X for comparison, and the controller adjusts the vein pressure method based on the comparison value, detects the systolic blood pressure SBP2 and the blood vessel elastic modulus after applying the vein pressure, and the controller calculates the optimal negative pressure during blood drawing P2 based on the detected systolic blood pressure SBP2 and the blood vessel elastic modulus; Perform puncture blood collection, and real-time detect the systolic blood pressure SBP3 during blood collection, the venous blood vessel diameter D3 during blood collection, and the blood flow velocity V1 during blood collection. The controller is used to dynamically adjust the pressure on the vein P3 and the negative pressure during blood drawing P4 during the blood collection process.

[0006] Optionally, the controller is further configured to adjust the pressure on the vein during the puncture process during the puncture blood collection process.

[0007] Optionally, the calculation formula for the optimal tourniquet pressure P1 is: where K 人群1 is the population correction factor.

[0008] Optionally, the calculation formula for the optimal blood drawing negative pressure P2 is: where K 人群2 is the population factor.

[0009] Optionally, the dynamic adjustment of the tourniquet pressure P3 during blood collection is:

[0010] Optionally, the dynamic adjustment of the blood drawing negative pressure P4 during blood collection is:

[0011] Optionally, the adjustment of the tourniquet pressure during the puncture process includes adjusting the tourniquet pressure to 110%-120%P1 before the blood collection needle enters the human skin, adjusting the tourniquet pressure to 60%-80%P1 after the blood collection needle enters the human skin, and gradually increasing the pressure to the optimal tourniquet pressure P1 during blood collection.

[0012] Optionally, the tourniquet assembly includes a first tourniquet assembly disposed at the proximal end and a second tourniquet assembly disposed at the distal end. The first tourniquet assembly includes a first clamping sleeve and a plurality of first tourniquet airbags spliced with each other on the inner wall of the first clamping sleeve. The second tourniquet assembly includes a second clamping sleeve and a plurality of second tourniquet airbags spliced with each other on the inner wall of the second clamping sleeve. The width of the first tourniquet airbag is greater than the width of the second tourniquet airbag.

[0013] Optionally, the thickness of the fat layer of the human body is detected during the puncture process, and the number of the first tourniquet airbag and the second tourniquet airbag during tourniquet application is adjusted based on the detected fat layer thickness.

[0014] Optionally, a heating device and a micro-vibration device are further disposed in the first clamping sleeve.

[0015] Compared with the prior art, the automatic blood collection and sampling device provided by the present invention has the beneficial effects that the controller of the device is used to select the corresponding blood drawing negative pressure propulsion method by judging the age of the blood collection personnel; S2, detect the systolic blood pressure SBP1 and the venous diameter D1 of the blood collection site before puncture, and calculate the optimal tourniquet pressure P1 based on the detected systolic blood pressure SBP1 and venous diameter D1; S3, after the tourniquet assembly applies the optimal tourniquet pressure, detect the venous blood vessel diameter D2 and compare it with the preset puncture diameter D XMake a comparison, adjust the pressure pulse method based on the comparison value, detect the systolic blood pressure SBP2 and the vascular elastic modulus after applying the pressure pulse, and calculate the optimal blood drawing negative pressure P2 based on the detected systolic blood pressure SBP2 and the vascular elastic modulus; S4. Puncture for blood collection, and in real time, detect the systolic blood pressure SBP3 during the blood collection process, the diameter D3 of the venous blood vessel during the blood collection process, and the blood flow velocity V1 during the blood collection process, and dynamically adjust the pressure pulse pressure P3 and the blood drawing negative pressure P4 during the blood collection process, so as to adjust the optimal blood collection parameters in real time for different populations, providing more safety assurance. Description of the Drawings

[0016] The drawings forming a part of this application are used to provide a further understanding of this application, making other features, objectives, and advantages of this application more obvious. The schematic embodiments and their descriptions of this application are used to explain this application and do not constitute an improper limitation of this application. In the drawings: Figure 1 is the control flow chart of the controller in the present invention; Figure 2 is a schematic diagram of the first pressure pulse assembly.

[0017] Among them: 1. The first clamping sleeve; 2. The first pressure pulse airbag. Detailed Embodiments

[0018] In order to enable those skilled in the art of this technology to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of this application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0020] In this application, terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements, or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0021] Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0022] In addition, the meaning of the term "plurality" should be two or more.

[0023] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0024] An automatic blood collection and sampling device includes a blood pressure cuff assembly, a puncture needle, a negative pressure blood drawing assembly, and a controller; wherein the controller is used for: S1. By judging the age of the blood collection personnel, select the corresponding blood collection negative pressure propulsion method. The age of the blood collection personnel can be obtained through the age information of the patient in the medical record or the blood collection order number. After obtaining the age information, classify the patients according to the age segments set in the system. For example, those aged 0 - 6 years are classified as infants, those aged 6 - 18 years are classified as children, those aged 18 - 60 years are classified as adults, and those aged 60 years and above are classified as the elderly. For infants, use a smaller initial negative pressure, such as setting it to half or one-third of the adult standard negative pressure. During the blood collection process, use a method of slowly increasing the negative pressure, with each increase not exceeding one-tenth of the adult standard negative pressure. For adults, use the standard negative pressure 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-fourths of the adult standard negative pressure. During the blood collection process, slightly and slowly increase the negative pressure, with the pressure increase amplitude being one-fifteenth or one-twentieth of the adult standard negative pressure; S2. Before puncture, detect the systolic blood pressure SBP1 and the venous diameter D1 of the blood collection site, and calculate the optimal blood pressure cuff pressure P1 based on the detected systolic blood pressure SBP1 and venous diameter D1; S3. After the blood pressure cuff assembly applies the optimal blood pressure cuff pressure, detect the venous blood vessel diameter D2 and compare it with the preset puncture diameter D XMake a comparison, adjust the blood pressure cuff method based on the comparison value, detect the systolic blood pressure SBP2 and the vascular elastic modulus after applying the blood pressure cuff, and calculate the optimal blood drawing negative pressure P2 based on the detected systolic blood pressure SBP2 and the vascular elastic modulus. S4. Perform puncture blood collection, and in real time detect the systolic blood pressure SBP3 during the blood collection process, the diameter D3 of the venous blood vessel during the blood collection process, and the blood flow velocity V1 during the blood collection process, and dynamically adjust the blood pressure cuff pressure P3 and the blood drawing negative pressure P4 during the blood collection process.

[0025] Among them, the systolic blood pressures SBP1, SBP2, and SBP3 are all detected by a finger-type sphygmomanometer, and the diameters D1 and D2 of the venous blood vessels are detected by ultrasound. Although the detection accuracy is slightly lower than that of angiography, angiography cannot perform real-time detection of the diameter of the venous blood vessel during the blood collection process. Finally, the blood flow velocity during the blood drawing process is measured by laser Doppler velocimetry or ultrasonic Doppler method. In addition, the negative pressure blood drawing device uses a variable-frequency blood drawing pump, and the controller can control the magnitude of its blood drawing pressure.

[0026] Preferably, during the puncture blood collection process, it also includes the adjustment of the blood pressure cuff pressure during the puncture process. The adjustment of the blood pressure cuff pressure during the puncture process includes adjusting the blood pressure cuff pressure to 110%-120%P1 before the blood collection needle enters the human skin, adjusting the blood pressure cuff pressure to 60%-80%P1 after the blood collection needle enters the human skin, and gradually increasing the pressure to the optimal blood pressure cuff pressure P1 during the blood collection process. It should be noted that increasing the blood pressure cuff pressure before entering the skin can relieve the stabbing pain during puncture, and timely reducing and releasing the blood pressure cuff pressure after puncture can create negative pressure for blood suction. Adjusting the blood pressure cuff pressure to the optimal blood pressure cuff pressure during the suction process is conducive to keeping the blood drawing in a stable stage.

[0027] Preferably, the calculation formula for the optimal blood pressure cuff pressure P1 is: where K 人群1 is the population correction coefficient, where K 人群1 In this embodiment, only the age correction coefficient is mainly considered. Among them, it is 0.7 for children, 1.0 for adults, and 0.8 for the elderly.

[0028] Preferably, the calculation formula for the optimal blood drawing negative pressure P2 is: where K 人群2 is the population coefficient, where K 人群2 In this embodiment, only the age coefficient is mainly considered. Among them, it is 0.7 for children, 1.0 for adults, and 0.8 for the elderly.

[0029] Preferably, the dynamic adjustment of the blood pressure cuff pressure P3 during the blood collection process is: where ΔSBP = SBP3 - SBP2.

[0030] Preferably, the negative pressure P4 during blood collection is dynamically adjusted as follows: where P I is the standard negative pressure for adults during negative pressure blood collection, such as set to -240 mmHg Preferably, as Figure 2 shown, the blood pressure cuff assembly includes a first blood pressure cuff assembly disposed at the proximal end and a second blood pressure cuff assembly disposed at the distal end. The first blood pressure cuff assembly includes a first clamping sleeve 1 and a plurality of first blood pressure air bags 2 spliced together on the inner wall of the first clamping sleeve 1. The second blood pressure cuff assembly includes a second clamping sleeve and a plurality of second blood pressure air bags spliced together on the inner wall of the second clamping sleeve. The width of the first blood pressure air bag 2 is greater than the width of the second blood pressure air bag. Among them, the single width of the first blood pressure air bag 2 is selected to be 1.5 cm, while the single width of the second blood pressure air bag is selected to be 1 cm. Among them Figure 2 is a schematic structural diagram of the first blood pressure cuff assembly, and the structure of the second blood pressure cuff assembly is similar to that of the first blood pressure cuff assembly, only the sizes of the blood pressure air bags are different.

[0031] It should be noted that both the first clamping sleeve and the second clamping sleeve also adopt an air bag structure, only their sizes are different. During blood collection, the human arm passes through the first clamping sleeve 1 and the second clamping sleeve in sequence, and then both are inflated to position the human arm. The air pressure inside the first clamping sleeve 1 and the second clamping sleeve is much lower than the air pressure inside the blood pressure air bag, so it will not affect blood pressure measurement. When measuring blood pressure, first select the number of the first blood pressure air bag 2 and the second blood pressure air bag according to the age of the person to be blood collected. When measuring blood pressure for infants and children, select one first blood pressure air bag 2 and one second blood pressure air bag. For adults and the elderly, two first blood pressure air bags 2 and second blood pressure air bags can be selected for blood pressure measurement. For obese people, a wide blood pressure cuff is automatically used for blood pressure measurement to assist in puncture. During the puncture process, the thickness of the fat layer of the human body is detected, and the number of the first blood pressure air bag 2 and the second blood pressure air bag during blood pressure measurement is adjusted based on the detected fat layer thickness. For example, for adults, the general population selects two first blood pressure air bags 2 and second blood pressure air bags. If the fat thickness of the blood collection personnel exceeds the preset value, then one more first blood pressure air bag 2 is added, and at the same time, two more second blood pressure air bags are added. That is, the width of the blood pressure air bag at the proximal end becomes 4.5 cm, and the width of the blood pressure air bag at the distal end becomes 4 cm. The main function of the proximal end is to block venous return. The wider blood pressure cuff can apply pressure evenly over a larger area, making the vein better filled and reducing damage to local tissues. In addition to assisting in venous filling, the distal blood pressure cuff can also play a role in fixing the needle. The wider blood pressure cuff can provide more stable fixation and reduce the risk of the needle moving or slipping out of the blood vessel.

[0032] In order to make the blood vessels prominent during the puncture process, making it more convenient for the automatic blood collection device to perform the puncture, thus eliminating the need for ultrasound guidance, simplifying the structure of the automatic blood collection device and reducing its cost, a heating device and a micro-vibration device are also provided inside the first clamping sleeve 1. Although increasing the pressure applied by the tourniquet can make the blood vessels prominent during the blood collection process, excessive pressure applied by the tourniquet affects human health. Therefore, local heating can accelerate blood circulation, making the blood vessels prominent and reducing blood pressure. In addition, micro-vibration can relieve the pain during the puncture of infants and young children, preventing them from making stress responses.

[0033] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An automatic blood sampling and injection device, characterized in that, It includes a blood pressure cuff assembly, a puncture needle, a negative pressure blood collection assembly, and a controller; wherein the controller is used for: Selecting a corresponding blood collection negative pressure propulsion method by judging the age of the blood collection personnel; Detecting the systolic blood pressure SBP1 and the venous diameter D1 of the blood collection site before puncture, and the controller calculates the optimal blood pressure cuff pressure P1 based on the detected systolic blood pressure SBP1 and venous diameter D1; After the blood pressure cuff assembly applies the optimal blood pressure, the diameter D2 of the venous blood vessel is detected and compared with the preset puncture diameter D X for comparison. The controller adjusts the blood pressure cuffing method based on the comparison value, detects the systolic blood pressure SBP2 and the blood vessel elastic modulus after blood pressure cuffing, and the controller calculates the optimal blood drawing negative pressure P2 based on the detected systolic blood pressure SBP2 and the blood vessel elastic modulus; Performing puncture blood collection, and detecting the systolic blood pressure SBP3 during blood collection, the venous blood vessel diameter D3 during blood collection, and the blood flow rate V1 during blood collection in real time. The controller is used for dynamically adjusting the blood pressure cuff pressure P3 and the blood collection negative pressure P4 during blood collection.

2. The automatic blood sampling and injection device according to claim 1, characterized in that: The controller is also used for adjusting the blood pressure cuff pressure during the puncture blood collection process.

3. The automatic blood sampling and injection device according to claim 1, wherein: The calculation formula for the optimal tourniquet pressure P1 is as follows: where K 人群1 is the population correction factor.

4. The automatic blood sampling and injection device according to claim 1, wherein: The calculation formula for the optimal blood drawing negative pressure P2 is as follows: where K 人群2 is the population coefficient.

5. The automatic blood sampling and injection device according to claim 1, wherein: Dynamically adjust the pressure P3 of the blood pressure cuff during blood collection to:

6. The automatic blood sampling and injection device according to claim 1, characterized in that: Dynamically adjust the blood drawing negative pressure P4 during the blood collection process to:

7. The automatic blood sampling and injection device according to claim 2, wherein: The adjustment of the blood pressure cuff pressure during the puncture process includes adjusting the blood pressure cuff pressure to 110%-120%P1 before the blood collection needle enters the human skin, adjusting the blood pressure cuff pressure to 60%-80%P1 after the blood collection needle enters the human skin, and gradually increasing the pressure to the optimal blood pressure cuff pressure P1 during blood collection.

8. The automatic blood sampling and injection device according to claim 1, wherein: The blood pressure cuff assembly includes a first blood pressure cuff assembly arranged at the proximal end and a second blood pressure cuff assembly arranged at the distal end. The first blood pressure cuff assembly includes a first clamping sleeve and a plurality of first blood pressure cuff air bags spliced with each other on the inner wall of the first clamping sleeve. The second blood pressure cuff assembly includes a second clamping sleeve and a plurality of second blood pressure cuff air bags spliced with each other on the inner wall of the second clamping sleeve. The width of the first blood pressure cuff air bag is greater than the width of the second blood pressure cuff air bag.

9. The automatic blood sampling and injection device according to claim 8, characterized in that: Detecting the thickness of the fat layer of the human body during puncture, and adjusting the number of the first blood pressure cuff air bags and the second blood pressure cuff air bags during blood pressure cuffing based on the detected fat layer thickness.

10. The automatic blood sampling and injection device according to claim 8, wherein: A heating device and a micro-vibration device are also arranged in the first clamping sleeve.

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