Blood collection device

Abstract

To provide a blood sampling device capable of reducing a load to a blood donor upon blood sampling by performing suction force control suitable for the blood donor.SOLUTION: A blood sampling device 1 includes a housing chamber 102 for housing a blood collection bag, an exhaust pump 22 for creating a negative pressure in the housing chamber, an opening valve 23 for atmospherically opening the housing chamber, and a control part 11 for controlling operation of the exhaust pump and the opening valve. The control part controls the operation of the exhaust pump based on blood sampling data before the present time of a blood donor.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a blood collection device for collecting blood into a blood bag.

Background Art

[0002] Conventionally, a blood collection device for collecting blood from a blood donor and storing it in a blood bag has been known (see, for example, Patent Document 1). As a blood collection method using a blood collection device, for example, there is a method of operating a suction pump connected to a blood bag storage chamber to maintain the blood bag at a negative pressure and suck blood. In this case, usually, from a blood collection mode in which no suction pressure is applied, a blood collection mode in which a weak suction pressure is maintained, a blood collection mode in which a strong suction pressure is maintained, and a blood collection mode in which the suction pressure is automatically controlled according to the amount of blood (= blood collection rate) collected from the blood donor per unit time, an appropriate blood collection mode is selected.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the blood collection rate varies depending on the age, body shape, and blood vessel condition of the blood donor. Therefore, the user has to judge and select an optimal blood collection mode in consideration of these factors. However, the judgment requires the user's experience, and the suction pressures set in the methods of maintaining a weak suction pressure and a strong suction pressure are actually fixed values and cannot be said to be the optimal suction pressures for the blood donor.

[0005] Furthermore, in methods that control suction pressure according to the blood collection speed, the process of increasing the suction pressure by operating the exhaust pump and the process of decreasing the suction pressure by releasing to the atmosphere when the blood collection speed exceeds a predetermined speed or when the blood collection speed decreases are repeated. Therefore, if the number of times the blood collection speed is reset by releasing to the atmosphere increases during blood collection, the blood collection efficiency decreases. In particular, in the case of blood donors with narrow blood vessels, the blood collection speed tends to be slower compared to blood donors with wide blood vessels, so if the blood collection speed is reset frequently, the blood collection time becomes very long, and the burden on the blood donor increases.

[0006] The objective of the present invention is to provide a blood collection device that can control the suction pressure to suit the blood donor and reduce the burden on the blood donor during blood collection. [Means for solving the problem]

[0007] A blood collection device according to one aspect of the present invention is: A storage room for blood collection bags, An exhaust pump that creates negative pressure in the aforementioned containment chamber, An opening valve for opening the aforementioned containment chamber to the atmosphere, The system comprises a control unit that controls the operation of the exhaust pump and the opening valve, The control unit has a function that is more advanced than the current time for the blood donor. Pre-blood sampling history data obtained from past blood samplings Based on Before Controls the operation of the exhaust pump. The system controls the suction pressure during blood collection using a first blood collection mode and a second blood collection mode that identifies a blood collection pattern based on blood collection history data obtained in the first few cycles of blood collection and controls the operation of the exhaust pump in subsequent cycles of blood collection. The system is configured to allow blood collection by transitioning from the first blood collection mode to the second blood collection mode. Furthermore, the control unit sets a target pressure value for exhausting the containment chamber based on the pre-blood collection history data in the first blood collection mode, and also sets a target pressure value based on the in-blood collection history data in the second blood collection mode, and operates the exhaust pump until the pressure inside the containment chamber reaches the target pressure value, and stops the operation of the exhaust pump after the target pressure value is reached. [Effects of the Invention]

[0008] According to the present invention, it is possible to control the suction pressure to a level suitable for the blood donor and reduce the burden on the blood donor during blood collection. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is an external view of a blood collection device 1 according to one embodiment of the present invention. [Figure 2] Figure 2 shows an example of the control system for the blood collection device 1. [Figure 3] Figure 3 is a diagram showing an example of blood collection history data. [Figure 4] Figure 4 is a flowchart showing an example of the blood collection process according to the first embodiment. [Figure 5] Figure 5 is a flowchart showing an example of the blood collection process in blood collection mode A. [Figure 6] Figure 6 is a flowchart showing an example of the blood collection process in blood collection mode B. [Figure 7] Figures 7A and 7B are diagrams showing an example of the blood collection result according to blood collection mode A. [Figure 8] Figures 8A and 8B are diagrams showing an example of the blood collection result according to blood collection mode B. [Figure 9] Figure 9 is a flowchart showing an example of the blood collection process in blood collection mode A. [Figure 10] Figure 10 is a flowchart showing an example of the blood collection process in blood collection mode C. [Figure 11] Figure 11 is a flowchart showing an example of the blood collection process in blood collection mode C.

Embodiments for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0011] [First Embodiment] Figure 1 is an external view of a blood collection device 1 according to an embodiment of the present invention. The blood collection device 1 is a device for collecting blood into a blood bag by a negative pressure method.

[0012] As shown in FIG. 1, the blood collection device 1 has a box-shaped housing 101, and an accommodation chamber 102 is provided inside the housing 101. The accommodation chamber 102 has an opening at the upper part, and the accommodation chamber 102 is opened or sealed by opening and closing a transparent lid 103. Also, a tray for placing a blood collection bag is installed in the accommodation chamber 102. Further, an input unit 13 and an output unit 14 are arranged on the front surface of the housing 101. The user performs blood collection processing while inputting and recognizing various information through the input unit 13 and the output unit 14.

[0013] FIG. 2 is a diagram showing an example of the control system of the blood collection device 1. As shown in FIG. 2, the blood collection device 1 includes a control unit 11, a storage unit 12, an input unit 13, an output unit 14, a communication unit 15, a swing unit 21, an exhaust pump 22, an opening valve 23, a weight measurement unit 31, a rotation measurement unit 32, a pressure measurement unit 33, a monitoring unit 34, etc.

[0014] The control unit 11 includes a CPU (Central Processing Unit) 111 as an arithmetic / control device, a ROM (Read Only Memory) 112 and a RAM (Random Access Memory) 113 as main storage devices, etc. Basic programs and basic setting data are stored in the ROM 112. The CPU 111 reads out a program corresponding to the processing content from the ROM 112, for example, expands it in the RAM 113, and executes the expanded program to centrally control the operations of each block of the blood collection device 1.

[0015] Note that part or all of the processing executed by the control unit 11 may be executed by an electronic circuit such as a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), or a PLD (Programmable Logic Device) provided according to the processing.

[0016] The memory unit 12 is an auxiliary storage device such as an HDD (Hard Disk Drive), SSD (Solid State Drive), or SD (Secure Digital) card, and stores programs and various data. For example, a blood collection processing program is stored in the memory unit 12.

[0017] The input unit 13 includes, for example, input devices such as character and number input keys, directional keys, and various function keys, as well as a reading device such as a barcode scanner. The input unit 13 receives input operations from the user and outputs operation signals to the control unit.

[0018] The output unit 14 includes, for example, a display device such as a liquid crystal display (LCD) or an electro-luminescence (EL) display, an alarm device such as a lamp, and an audio output device such as a speaker. The output unit 14 outputs various information according to the instructions of the control unit 11. The input unit 13 and the output unit 14 may be composed of flat panel displays with touch panels.

[0019] The communication unit 15 is a communication interface such as a NIC (Network Interface Card), MODEM (Modulator-DeModulator), or USB (Universal Serial Bus). The control unit 11 transmits and receives various information to and from an external terminal device 2 connected to a network such as a wired / wireless LAN or the Internet via the communication unit 15. The communication unit 15 can also be fitted with a communication interface for short-range wireless communication such as NFC (Near Field Communication) or Bluetooth (registered trademark).

[0020] External terminal device 2 holds the donor's past blood collection history data. External terminal device 2 is, for example, a cloud-based server device that can be accessed via the internet. Alternatively, external terminal device 2 may be a server device for the hospital information system (HIS) within the medical facility where the blood collection device 1 is used.

[0021] The oscillating unit 21 oscillates the tray according to instructions from the control unit 11. The oscillating unit 21 includes, for example, an oscillating mechanism and a drive motor for oscillating the tray. By oscillating the tray during blood collection, the anticoagulant contained in the blood bag is mixed with the blood, preventing blood coagulation.

[0022] The exhaust pump 22 evacuates the contents of the containment chamber 102 and maintains a negative pressure according to the instructions of the control unit 11. The exhaust pump 22 is composed of, for example, a vacuum pump. When operating, the exhaust pump 22 continues to evacuate at a predetermined exhaust speed.

[0023] The release valve 23 opens the containment chamber 102 to the atmosphere in accordance with the instructions of the control unit 11. The release valve 23 may be located in the piping that communicates with the containment chamber 102, or it may be built into the exhaust pump 22.

[0024] The weight measurement unit 31 is a weight sensor for measuring the weight of the blood bag placed on the tray, and is composed of, for example, a load cell. The control unit 11 controls the operation of the oscillating unit 21, the exhaust pump 22, and the opening valve 23 based on the measurement results of the weight measurement unit 31.

[0025] The rotation measurement unit 32 is a rotation sensor for measuring the rotation of the gears or pivot shaft of the oscillating mechanism and the rotation of the drive motor. The control unit 11 appropriately controls the operation of the oscillating unit 21 based on the measurement results of the rotation measurement unit 32.

[0026] The pressure measurement unit 33 is a pressure sensor for measuring the pressure inside the containment chamber 102. The control unit 11 controls the operation of the exhaust pump 22 and the release valve 23 based on the measurement results from the pressure measurement unit 33.

[0027] The monitoring unit 34 is an open / close sensor that detects the open / closed state of the lid 103. Based on the detection result of the monitoring unit 34, the control unit 11 determines the open / closed state of the lid 103 and permits the blood collection process to be executed only if it is in the closed state.

[0028] The blood collection device 1 has multiple blood collection modes, each with a different method of controlling the suction pressure during blood collection. These multiple blood collection modes include blood collection mode A, which controls the suction pressure during blood collection based on the donor's blood collection history data, and blood collection modes B and C, which are performed when there is no blood collection history data for the donor. Blood collection mode B is the same as the conventional mode that automatically controls the suction pressure. The blood collection device 1 of this embodiment differs from conventional blood collection devices in that it can perform blood collection in blood collection modes A and C. The blood collection device 1 may also have a conventional blood collection mode with no suction pressure, a blood collection mode with a sustained weak suction pressure, and a blood collection mode with a sustained strong suction pressure, allowing the user to manually select the appropriate blood collection mode from among the multiple blood collection modes.

[0029] Figure 3 shows an example of blood collection history data referenced during blood collection in the blood collection device 1. The blood collection history data shown in Figure 3 is, for example, actual measurement data obtained in one blood collection. The blood collection history data is included in the donor information. In addition to the blood collection history data, the donor information includes donor identification information (e.g., donor ID), name, age, gender, height, weight, etc. Multiple blood collection history data may be stored for each donor, for example, the most recent predetermined number of collections, or only the most recent blood collection history data may be stored.

[0030] The blood collection history data shown in Figure 3 includes the time fluctuations of the pressure P and blood volume V in the containment chamber 102 during blood collection. The blood collection history data also includes the date and time of blood collection and the blood collection mode. According to the blood collection history data in Figure 3, it can be understood that blood collection was performed using blood collection mode B (conventional automatic suction pressure control), that at timings t1 and t2 the blood collection rate (blood volume per unit time) exceeded a predetermined upper limit (e.g., 200 mL / min) and was released to the atmosphere, that at timing t3 the blood collection rate decreased and was released to the atmosphere, and that at timing t4 the target blood volume was reached and blood collection was completed.

[0031] By analyzing blood collection history data, it is possible to calculate, for example, the optimal target pressure value at the time of blood collection. The "optimal target pressure value" is the pressure at which blood can be collected most efficiently without opening to the atmosphere, and can be calculated, for example, based on a blood collection pattern that includes the time variation of pressure P and blood collection volume V. For example, a calculation formula for calculating the target pressure value is set for each blood collection pattern. This target pressure value may be calculated by the control unit 11 of the blood collection device 1 after acquiring blood collection history data from the external terminal device 2 at the time of blood collection, or it may be calculated in advance in the external terminal device 2 and stored as blood collection history data.

[0032] The target pressure value is calculated, for example, based on the maximum pressure value included in the blood collection history data (the pressure value at timing t1 in Figure 3) and the amount of blood collected until the maximum pressure value is reached. Furthermore, when the target pressure value is set in the blood collection device 1, adjustments may be made to the target pressure value calculated based on the blood collection history data, taking into consideration the health condition of the person collecting the blood.

[0033] Furthermore, it is preferable that the donor's blood collection history data is associated with the donor's biological information at the time of collection (e.g., height, weight, blood pressure, and electrocardiogram), environmental information (e.g., weather, atmospheric pressure), and device information of the blood collection device used (e.g., pressurization rate). Big data can also be used for the information associated with the blood collection history data. Based on this information, by subdividing and classifying the blood collection history data obtained in the past, an optimal target pressure value can be set for each classification. On the day of blood collection, the blood collection history data of the classification that is closest to the donor's condition is adopted, thereby optimizing the suction pressure control during blood collection.

[0034] Figure 4 is a flowchart showing an example of a blood collection process according to the first embodiment. This process is realized, for example, when the user performs an input operation to instruct the start of blood collection, and the CPU 111 executes a blood collection process program stored in the memory unit 12.

[0035] First, in step S11, the control unit 11 displays a blood collection preparation screen. On the blood collection preparation screen, for example, the user is prompted to enter a donor ID. If the donor does not have a donor ID, for example, the user is prompted to register new donor information.

[0036] In step S12, the control unit 11 acquires donor information. For example, when the donor ID is read by the barcode reader of the input unit 13, the control unit 11 compares it with the database held in the server device and acquires donor information.

[0037] In step S13, the control unit 11 determines whether or not there is blood collection history data for the blood donor. Blood collection history data is pre-blood collection history data obtained from blood collections prior to the current blood collection. If the blood donor information includes blood collection history data (YES in step S13), the control unit 11 proceeds to the process in step S14. If the blood donor information does not include blood collection history data (NO in step S13), the control unit 11 proceeds to the process in step S17.

[0038] In step S14, the control unit 11 selects blood collection mode A and reads the program for blood collection mode A. In step S15, the control unit 11 executes the blood collection process in blood collection mode A (see Figure 5 for details). According to blood collection mode A, the suction pressure during blood collection is controlled based on the donor's blood collection history data. When blood collection in blood collection mode A is completed, in step S16, the control unit 11 transmits the blood collection data to the external terminal device 2 and registers it as blood collection history data.

[0039] If it is determined in step S13 that there is no blood collection history data, in step S17 the control unit 11 selects blood collection mode B and reads the program for blood collection mode B. In step S18 the control unit 11 executes the blood collection process in blood collection mode B (see Figure 6 for details). Automatic suction pressure control is performed in the same way as before, according to blood collection mode B. When blood collection in blood collection mode B is completed, in step S16 the control unit 11 transmits the blood collection data to the external terminal device 2 and registers it as blood collection history data.

[0040] Figure 5 is a flowchart showing an example of the blood collection process in blood collection mode A. In step S101, the control unit 11 sets a target pressure value. The control unit 11 analyzes the acquired blood collection history data to identify the maximum pressure value that can be set as the target pressure value for the blood donor (for example, the pressure value at timing t1 in Figure 3) and the amount of blood collected until the maximum pressure value is reached, and sets the target pressure value based on these. At this time, the target pressure value may be adjusted according to the weather (atmospheric pressure) on the day of blood collection and the health condition of the blood donor. The adjustment of the target pressure value may be performed automatically by the blood collection device 1 or based on manual operation by the user.

[0041] In step S102, the control unit 11 controls the opening valve 23 to a closed state and starts the operation of the exhaust pump. The pressure inside the containment chamber 102 gradually increases in the negative direction, and blood collection proceeds.

[0042] In step S103, the control unit 11 determines whether the target pressure value has been reached based on the measurement result of the pressure measurement unit 33. If the target pressure value has been reached (YES in step S103), the control unit 11 proceeds to the process in step S104. If the target pressure value has not been reached (NO in step S103), the control unit 11 repeats the process in step S103. Alternatively, if the target pressure value has not been reached, the process may proceed to step S106, where the release valve 23 is opened according to the blood collection dynamics.

[0043] In step S104, the control unit 11 stops the exhaust pump 22. The pressure inside the containment chamber 102 is maintained at a nearly constant level, which is the optimal target pressure value for the blood donor.

[0044] In step S105, the control unit 11 gradually opens the release valve 23. For example, the opening and closing operations of the release valve 23 are repeated at predetermined time intervals. This process gradually reduces the pressure inside the containment chamber 102. Generally, as the amount of blood collected increases, the donor's circulating blood volume decreases, and blood pressure drops. If the pressure inside the containment chamber 102 is too high relative to the donor's blood pressure, the blood collection rate may decrease. Therefore, in step S105, the operation of the release valve 23 is controlled so that the pressure inside the containment chamber 102 does not become too high relative to the donor's blood pressure. Alternatively, the process in step S105 may be omitted, and the pressure inside the containment chamber 102 may be kept constant.

[0045] In step S106, the control unit 11 determines whether the target blood volume has been reached based on the measurement result of the weight measuring unit 31. If the target blood volume has been reached (YES in step S106), the control unit 11 proceeds to step S107 and opens the release valve 23. Blood collection in blood collection mode A is then completed. If the target blood volume has not been reached (NO in step S106), the control unit 11 proceeds to step S108.

[0046] In steps S108 and S109, the control unit 11 determines whether the blood collection state is appropriate. The control unit 11 determines whether the blood collection state is appropriate, for example, based on the increment ΔV of the blood volume collected over a predetermined period. The appropriate range for the blood collection rate is, for example, 0 mL / min to 200 mL / min.

[0047] Specifically, in step S108, the control unit 11 determines whether the amount of blood collected per unit time has decreased, that is, whether the blood collection rate has decreased, based on the increment ΔV of the blood collection volume. If the blood collection rate has decreased ("YES" in step S108), the blood collection condition of the donor has deteriorated due to insufficient blood flow, etc. In this case, the control unit 11 proceeds to the process in step S110. On the other hand, if the blood collection rate has not decreased ("NO" in step S108), there has been no decrease in the blood collection rate due to insufficient blood flow, etc. In this case, the control unit 11 proceeds to the process in step S109.

[0048] In step S108, it may be determined that the blood collection speed has decreased if the blood collection speed is lower than the blood collection speed at the time of the previous determination, or a threshold may be set for determining a decrease in the blood collection speed, and it may be determined that the blood collection speed has decreased if the blood collection speed decreases by more than the threshold.

[0049] In step S109, the control unit 11 determines whether the blood collection rate is above a predetermined rate based on the increment ΔV of the blood collection volume. If the blood collection rate is above the predetermined rate (YES in step S109), excessive blood collection occurs. In this case, the control unit 11 proceeds to the process in step S110. On the other hand, if the blood collection rate is below the predetermined rate (NO in step S109), the blood collection rate is maintained at a nearly constant rate, and blood collection is performed under appropriate conditions. In this case, the control unit 11 proceeds to the process in step S106.

[0050] In step S110, the control unit 11 opens the release valve 23. The containment chamber 102 is opened to the atmosphere and the pressure drops to near atmospheric pressure. Consequently, the blood collection speed temporarily decreases. After being opened to the atmosphere, the control unit 11 repeats the process from step S102 onward. That is, the pressure is raised again to the target pressure value, and blood collection is performed at the target pressure value.

[0051] Figure 6 is a flowchart showing an example of the blood collection process in blood collection mode B. In step S121, the control unit 11 controls the opening valve 23 to a closed state and starts the operation of the exhaust pump. The pressure inside the containment chamber 102 gradually increases in the negative direction, and blood collection proceeds.

[0052] In step S122, the control unit 11 determines whether the target blood volume has been reached. If the target blood volume has been reached (YES in step S122), the control unit 11 proceeds to step S123 and opens the release valve 23. Blood collection in blood collection mode B is then completed. If the target blood volume has not been reached (NO in step S122), the control unit 11 proceeds to step S124.

[0053] In steps S124 and S125, the control unit 11 determines whether the blood collection condition is appropriate. The processing in steps S124 and S125 is the same as the processing in steps S108 and S109 in Figure 5. That is, if the blood collection condition is appropriate ("NO" in steps S124 and S125), the control unit 11 proceeds to the processing in step S122 and repeats the processing in steps S122, S124 to S126 until the target blood collection volume is reached. If the blood collection condition is not appropriate ("YES" in step S124 or step S125), the control unit 11 proceeds to the processing in step S126 and opens the release valve 23. The containment chamber 102 is opened to the atmosphere, and the blood collection rate decreases temporarily. After being opened to the atmosphere, the control unit 11 repeats the processing from step S121 onwards. In other words, blood collection is performed again while increasing the pressure, and when the blood collection rate becomes unsuitable, it is opened to the atmosphere.

[0054] Figures 7A and 7B show examples of blood collection history. Figure 7A shows the blood collection history when blood collection is performed according to blood collection mode A, and Figure 7B shows the blood collection history when blood collection is performed according to blood collection mode B. Figures 7A and 7B show the case where the donor's blood flow condition is relatively good.

[0055] Figures 8A and 8B show another example of a blood collection history. Figure 8A shows the history when blood collection was performed according to blood collection mode A, and Figure 8B shows the history when blood collection was performed according to blood collection mode B. Figures 8A and 8B show the case where the donor's blood flow condition is relatively poor.

[0056] The target pressure value P0 controlled in blood collection mode A is calculated based on the donor's blood collection history data. If blood collection is performed at or below this target pressure value, the blood collection rate is likely to be maintained within an appropriate range. In other words, although steps S108 and S109 are provided for safety, it is rare for the response to be "YES" in step S108 or S109 and for the blood to be released to the atmosphere in step S110. This is at least less frequent than the number of times the blood is released to the atmosphere compared to conventional blood collection modes (e.g., blood collection mode B).

[0057] Therefore, as shown in Figures 7A and 8A, blood collection proceeds at a constant rate, the amount of blood collected increases steadily, and blood is collected more efficiently compared to when blood is collected using the conventional blood collection mode (see Figures 7B and 8B). As a result, the time required for blood collection is significantly reduced, and the burden on the blood donor is also reduced.

[0058] [Second Embodiment] Figure 9 is a flowchart showing an example of a blood collection process according to the second embodiment. In the second embodiment, if there is no blood collection history data for the blood donor (YES in step S23), blood collection mode C is selected in step S27, and blood collection is performed in step S28 according to blood collection mode C, which is different from the first embodiment. The processing of steps S21 to S26 shown in Figure 9 is the same as steps S11 to S16 in Figure 4.

[0059] Figures 10 and 11 are flowcharts showing an example of the blood collection process in blood collection mode C. The process in steps S201 to S206 shown in Figure 10 is the same as steps S121 to S126 in Figure 6.

[0060] In the second embodiment, after being released to the atmosphere in step S206, the process proceeds to step S207 in Figure 11. The control unit 11 controls the operation of the exhaust pump 22 based on the blood collection history data obtained in the first few cycles of the blood collection. Specifically, in step S207, the control unit 11 acquires the blood collection data for the first cycle from the start of blood collection until it is released to the atmosphere as an example of the blood collection history data, and identifies the blood collection pattern of the blood donor.

[0061] Then, in step S208, the control unit 11 sets a target pressure value based on the blood sampling pattern identified in step S207. Steps S209 to S217 are the same as steps S102 to S110 in Figure 5.

[0062] Compared to setting the target pressure value based on past blood collection history data before blood collection, as in blood collection mode A, the accuracy of the target pressure value set in step S208 may be inferior. However, compared to blood collection mode B, which uses conventional automatic suction pressure control, the number of times the system is released to the atmosphere is reduced, allowing for more efficient blood collection.

[0063] Furthermore, in blood collection mode A, if the blood collection condition is determined to be unsuitable, the system may transition to blood collection mode C after being released to the atmosphere in step S110 of Figure 5. If the blood collection condition is unsuitable, it means that the suction pressure control based on the pre-blood collection history data was not suitable for the donor on that day. Therefore, in the cycle after being released to the atmosphere, the suction pressure control is performed based on the blood collection data up to the time of release to the atmosphere, i.e., the blood collection history data, so that the suction pressure control is suitable for the donor on that day, and blood collection can be performed efficiently.

[0064] As described above, the blood collection device 1 according to this embodiment includes a storage chamber 102 for housing a blood collection bag, an exhaust pump 22 for creating negative pressure in the storage chamber 102, an opening valve 23 for opening the storage chamber 102 to the atmosphere, and a control unit 11 for controlling the operation of the exhaust pump 22 and the opening valve 23. The control unit 11 controls the operation of the exhaust pump based on the donor's blood collection history data (blood collection data from before the current time).

[0065] Specifically, in the blood collection device 1, the control unit 11 sets a target pressure value for exhausting the containment chamber 102 based on blood collection history data (blood collection data from before the current time), operates the exhaust pump 22 until the pressure inside the containment chamber 102 reaches the target pressure value, and stops the operation of the exhaust pump 22 after the target pressure value is reached.

[0066] According to the blood collection device 1, an optimal target pressure value is set for the donor based on past blood collection history data, and suction pressure control is performed to maintain this target pressure value. This significantly reduces the number of times the blood is released to the atmosphere due to exceeding the blood collection rate. Therefore, the number of times the blood collection rate is reset due to release to the atmosphere is reduced, and blood collection efficiency is significantly improved. As a result, the burden on the donor during blood collection can be reduced. In addition, power consumption during blood collection can be reduced, and wear on the components of the blood collection device 1 can be suppressed. Furthermore, noise generated when the blood is released to the atmosphere is suppressed, improving quietness.

[0067] Furthermore, in the blood collection device 1, the control unit 11 opens the release valve 23 and restarts exhaust by the exhaust pump 22 when the blood collection rate decreases by more than a predetermined amount (YES in step S124 of Figure 6) or when the blood collection rate exceeds a predetermined upper limit (YES in step S125 of Figure 6). This improves blood collection efficiency and ensures safety during blood collection.

[0068] Furthermore, the blood collection device 1 includes a storage unit 12 that stores blood collection history data (blood collection data), and the control unit 11 acquires the blood collection data from the storage unit 12. This makes it possible to achieve efficient blood collection even with a standalone blood collection device 1.

[0069] Furthermore, the blood collection device 1 is equipped with a communication unit 15 that can communicate with an external terminal device 2, and the control unit 11 acquires blood collection history data (blood collection data) stored in the external terminal device 2 via the communication unit 15. This allows multiple blood collection devices 1 to share blood collection history data, improving convenience. It also becomes possible to calculate target pressure values ​​based on a large amount of blood collection history data, enabling highly accurate suction pressure control.

[0070] The blood collection data is pre-collection history data obtained from blood collections performed prior to the current blood collection. The control unit 11 acquires the pre-collection history data before the start of the current blood collection and controls the operation of the exhaust pump 22 based on the pre-collection history data. This makes it possible to provide highly accurate suction pressure control to blood donors who require frequent blood collection, such as those undergoing autologous blood donation, thereby reducing their burden.

[0071] Furthermore, as in the second embodiment, the blood collection data is blood collection history data obtained during the first few cycles of blood collection, and the control unit 11 may acquire the blood collection history data during blood collection and control the operation of the exhaust pump 22 based on the blood collection history data in subsequent cycles of blood collection. This makes it possible to provide highly accurate suction pressure control even to blood donors who are having blood collected for the first time, thereby reducing their burden. In addition, even if blood collection was performed in blood collection mode A based on pre-blood collection history data, more appropriate suction pressure control can be performed.

[0072] Although the present invention has been specifically described above based on embodiments, the present invention is not limited to the above embodiments and can be modified without departing from its spirit.

[0073] For example, in this embodiment, if there is no blood collection history data, blood collection is automatically performed using blood collection mode B or C. However, the user may be allowed to manually select the blood collection mode.

[0074] Furthermore, when storing blood collection history data in the storage unit 12 of the blood collection device 1, it may be possible to enable periodic updates via a network or a portable storage medium.

[0075] Furthermore, when the blood collection device 1 acquires blood collection history data from the external terminal device 2, the target pressure value may be calculated in advance in the external terminal device 2 and stored as blood collection history data, and the blood collection device 1 may acquire only the target pressure value as blood collection history data. In this case, the processing load on the blood collection device 1 can be reduced. In addition, since the external terminal device 2 has a higher processing capacity than the blood collection device 1, it can analyze the blood collection history data in detail using big data, etc., and it becomes possible to set a more appropriate target pressure value.

[0076] Furthermore, although the embodiment described a case in which the operation of the exhaust pump 22 is controlled by setting a target pressure value based on blood collection history data, if the pressure-boosting speed of the exhaust pump 22 can be controlled, the pressure-boosting speed at the time of blood collection may be set based on the blood collection history data.

[0077] Furthermore, if several years have passed since the date of past blood collection history data, the donor's condition may have changed. In such cases, the output unit 14 may display a message indicating that a long period of time has passed since the last blood collection, allowing the user to select a blood collection mode.

[0078] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of symbols]

[0079] 1. Blood collection device 2. External terminal device 11 Control Unit 12 Storage section 22 Exhaust pump 23 Open valve 102 Confinement Room

Claims

1. A storage room for blood collection bags, An exhaust pump that creates negative pressure in the aforementioned containment chamber, An opening valve for opening the aforementioned containment chamber to the atmosphere, The system comprises a control unit that controls the operation of the exhaust pump and the opening valve, The control unit controls the suction pressure during blood collection in two modes: a first blood collection mode in which it controls the operation of the exhaust pump based on pre-blood collection history data obtained from past blood collections of the donor prior to the current time; and a second blood collection mode in which it identifies a blood collection pattern based on in-blood collection history data obtained in the first few cycles of blood collection and controls the operation of the exhaust pump in subsequent cycles of blood collection. The control unit is configured to allow blood collection by transitioning from the first blood collection mode to the second blood collection mode. Furthermore, the control unit sets the target pressure value for exhausting the containment chamber based on the pre-blood collection history data in the first blood collection mode, and based on the in-blood collection history data in the second blood collection mode, and operates the exhaust pump until the pressure inside the containment chamber reaches the target pressure value, and stops the operation of the exhaust pump after the target pressure value is reached. Blood collection device.

2. The blood collection device according to claim 1, wherein the control unit, while performing blood collection in the first blood collection mode, determines that the blood collection state is inappropriate, and then switches to the second blood collection mode to continue blood collection.

3. The blood collection device according to claim 2, wherein the control unit determines that the amount of blood collected per unit time has decreased, or that the blood collection speed is greater than or equal to a predetermined speed, while performing blood collection in the first blood collection mode, and determines that the blood collection state is inappropriate.

4. The control unit opens the release valve and restarts exhaust by the exhaust pump when the blood collection rate decreases or exceeds a predetermined upper limit. The blood collection device according to claim 1.

5. The system includes a storage unit that stores the pre-blood collection history data, The control unit acquires the pre-blood collection history data from the storage unit. A blood collection device according to any one of claims 1 to 4.

6. Equipped with a communication unit capable of communicating with external terminal devices, The control unit acquires the pre-blood collection history data stored in the external terminal device via the communication unit. A blood collection device according to any one of claims 1 to 4.

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