JPH0554993B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vacuum blood sampling device for collecting blood into a blood container.

[Prior Art] Conventionally, a vacuum blood sampling device as described in Japanese Patent Publication No. 51-3153 has been proposed. The vacuum blood collection device is equipped with a vacuum blood collection chamber in which the pressure is reduced by a vacuum pump and a blood container is set, and blood is collected into the blood container by the negative pressure generated in the vacuum blood collection chamber.

Here, the negative pressure generated in the vacuum blood collection chamber and applied to the blood container acts as a blood collection suction force on the donor's blood vessel via the blood collection needle connected to the blood container.

[Problem to be solved by the invention] By the way, blood vessels of blood donors have various thicknesses.
When using a conventional vacuum blood sampling device, if the blood donor's blood vessel is thinner than the standard, the suction force generated at the needle hole of the blood collection needle will stick to the blood vessel wall, resulting in blockage of the needle hole, making blood collection difficult or impossible. do.

The present invention enables blood vessels to be
The purpose is to always be able to stably collect blood.

[Means for Solving the Problem] The present invention as set forth in claim 1 includes a vacuum blood collection chamber in which the pressure is reduced by a vacuum pump and a blood container is set, and blood is collected by negative pressure generated in the vacuum blood collection chamber. In a vacuum blood sampling device that collects blood into a container, there is provided a blood sampling amount measuring means for measuring the amount of blood drawn into the blood container, and a condition that the increase rate of the measured value of the blood sampling amount measuring means does not reach a predetermined increase rate. and control means for controlling the negative pressure in the vacuum blood collection chamber to be lower than the set pressure.

The present invention according to claim 2 further includes a pressure sensor for detecting the pressure in the vacuum blood collection chamber, and a storage means for storing a set pressure to be generated in the vacuum blood collection chamber,
The control means obtains the detected pressure of the pressure sensor, the set pressure of the storage means, and the measured value of the blood sampling amount measuring means,
The pressure in the vacuum blood collection chamber is controlled so that the detected pressure of the pressure sensor matches the set pressure of the storage means, and the blood collection amount measuring means measures the amount when the detected pressure of the pressure sensor reaches the set pressure of the storage means. The negative pressure in the vacuum blood collection chamber is controlled to be lower than the set pressure on the condition that the rate of increase in value does not reach a predetermined rate of increase.

According to a third aspect of the present invention, the control means controls the negative pressure in the vacuum blood collection chamber to a set pressure by controlling the vacuum pump on/off.

In the present invention as set forth in claim 4, the storage means stores, in addition to the standard set pressure, a secondary set pressure that is lower in negative pressure level than the standard set pressure, and the control means controls the operation of the vacuum blood collection chamber under the conditions. The negative pressure is controlled to be reduced from the standard set pressure to the secondary set pressure.

In the present invention as set forth in claim 5, the control means controls the negative pressure of the vacuum blood collection chamber to be reduced stepwise from the set pressure under the conditions, and the increase rate of the measured value of the blood collection amount measuring means is set to the predetermined value. The above reduction control operation is executed until a predetermined increase rate is reached.

In the present invention as set forth in claim 6, the vacuum piping connecting the vacuum pump and the vacuum blood collection chamber is provided with an exhaust valve, and the control means controls to reduce the negative pressure in the vacuum blood collection chamber by opening the exhaust valve. This is what I did.

[Function] According to the present invention as set forth in claim 1, the amount of blood collected into the blood container is measured, and the control means performs the following on the condition that the rate of increase in the measured amount of blood collected does not reach a predetermined rate of increase. It is determined that the needle hole of the blood collection needle is adsorbing the blood vessel wall and is in an occluded state, and the negative pressure in the vacuum blood collection chamber is controlled to be lower than the set pressure. As a result, the blood collection suction force is automatically adjusted to a level that allows blood collection (for example, a level that allows natural blood collection). Therefore, regardless of the diameter of the donor's blood vessels, blood can always be stably collected, and blood can be collected smoothly even from donors with thin blood vessels, although it takes some time.

According to the second aspect of the present invention, the target level of the negative pressure generated in the vacuum blood collection chamber is stored as the measured pressure in the storage means, and the actual pressure in the vacuum blood collection chamber is detected by the pressure sensor, and the control means The pressure in the vacuum blood collection chamber is controlled so that the detected pressure matches the set pressure. At the same time, the amount of blood to be collected into the blood container is measured, and the control means is configured to perform, on the condition that the rate of increase in the measured amount of blood to be collected does not reach a predetermined rate of increase while the detected pressure has reached the set pressure. The negative pressure in the vacuum blood collection chamber is controlled to be lower than the set pressure. According to this, it is possible to more accurately determine that "the needle hole of the blood sampling needle is adsorbing the blood vessel wall and is in an occluded state."

According to the present invention as set forth in claim 3, the vacuum pump is controlled on/off as shown in FIG. 7A, and the negative pressure in the vacuum blood collection chamber is kept very small within a certain range of the set pressure as shown in FIG. 7B. changes, resulting in a constant pressure state. According to this, since the vacuum pump is not operated continuously, its electrical efficiency is improved, and a stable control state can always be ensured over time.

According to the present invention as set forth in claim 4, the blood collection suction force can be automatically adjusted to a level that allows blood collection immediately.

According to the present invention as set forth in claim 5, it is possible to reduce the amount of reduction in the blood collection suction force to the necessary minimum.

According to the sixth aspect of the present invention, the negative pressure in the vacuum blood collection chamber can be rapidly reduced and the blood collection suction force can be quickly adjusted.

[Example] Fig. 1 is a front view showing a blood sampling device according to an embodiment of the present invention, Fig. 2 is a side view showing a main part of Fig. 1 cut away, and Fig. 3 is a plan view of Fig. 1. Figure 4 is the first
Fig. 5 is a diagram of the vacuum circuit, Fig. 6 is the control block diagram, and Fig. 7 is the on/off control state of the vacuum pump and the pressure state of the vacuum blood collection chamber. It is a line diagram.

The blood sampling device 10, as shown in FIGS. 1 to 4,
A display panel 12 is provided on the front of the housing 11,
A vacuum blood collection chamber 13 is formed inside the housing 11. 14 is the opening/closing lid of the blood collection chamber 13, 15 is the lid 1
Hinge 4 and 16 are sealing rubber for sealing the blood collection chamber 13. 14A is a handle of the lid 14.
Further, the blood sampling device 10 includes a vacuum pump 17 and a control device 18 in the lower part of the housing 11.

The vacuum blood collection chamber 13 of the blood collection device 10 is connected to an inlet port 17A of a vacuum pump 17 so as to be able to reduce the pressure, and is equipped with a bag tray 19 that supports a blood bag (blood container) 1 made of polyvinyl chloride or the like. There is. The blood sampling device 10 applies a predetermined negative pressure to the blood bag 1 supported by the bag receiving tray 19 to collect blood while reducing the pressure in the vacuum blood sampling chamber 13 . At this time, the blood collecting device 10 shakes the bag tray 19 to stir the blood and an anticoagulant such as heparin that has been loaded in the blood bag 1 in advance, and also measures the weight of the blood bag 1 to collect blood. measure quantity.

The structure for swinging the bag receiving tray 19 and the structure for measuring the weight of the blood bag 1 in the blood collecting device 10 are as follows.

First, a pedestal 20 is installed at the bottom of the vacuum blood collection chamber 13, and a swing frame 22 that is rotatable via a support shaft 21 is supported on the pedestal 20.
Further, a swing motor 23 is fixed to the pedestal 20,
and a driving shaft 24 driven by a swing motor 23
is supported. 25 and 26 are toothed pulleys,
27 is a toothed belt. A crank wheel 28 is fixed to one end of the driving shaft 24.
One end of the link 29 is connected to the rotation radius of the
The other end of the link 29 is connected to a connecting piece 30 that is integral with the swing frame 22.

On the other hand, a pair of scale mounting blocks 31 are fixed to the upper surface of the swing frame 22, and both mounting blocks 31
A scale (collected amount measuring means) 33 is supported in a cantilever manner by a support plate 32 that spans over the end of the sample. The scale 33 is equipped with strain gauges 34 as weight sensors attached to two positions on the top surface and two positions on the bottom surface to form a Wheatstone bridge circuit, and a weighing platform 35 and a receiving plate 36 are attached to the tip of the scale 33. The bag receiving tray 19 described above is fixed therebetween.
37 is a stopper that prevents the balance 33 from swinging from side to side;
38 is a weight sensor amplification unit.

That is, the blood sampling device 10 rotates the driving shaft 24 and the crank wheel 28 by the operation of the swing motor 23, thereby swinging the swing frame 22, and is supported by the swing frame 22 via the scale 33. This means that the bag receiving tray 19 that is in place will be rocked. In addition, in the blood sampling device 10, a bag tray 19 is supported on a scale 33 which is cantilever-supported via a mounting block 31 and a support plate 32 on a swing frame 22. The weight of bag 1 is measured, and thus the amount of blood collected is measured.

Note that the blood sampling device 10 detects the rotational position of the detection cam 39 provided at the other end of the driving shaft 24 using an optical sensor 40.
Under the condition that the bag receiving tray 19 is temporarily stopped at the lowest point (bottom dead center) and held under a constant posture condition, the swing motor 23 is driven and controlled thereby. The weight of the blood bag 1 is measured as described above.

As shown in FIG. 5, the blood collection device 10 connects the inlet port 17A of the vacuum pump 17 and the vacuum blood collection chamber 13 with a vacuum pipe 41, and connects the vacuum pipe 41 with a
The exhaust valve 43 is closed when the exhaust solenoid 42 is turned on and opened by gravity when the exhaust solenoid 42 is turned off. The blood collection device 10 creates a constant negative pressure (degree of vacuum) in the vacuum blood collection chamber 13 by on/off control of the vacuum pump 17, and opens the exhaust valve 43 at the end of blood collection to close the vacuum blood collection chamber 1.
3 is released to the atmosphere.

The blood collection device 10 includes a tube holder 44 in the upper part of the front side of the housing 11 adjacent to the vacuum blood collection chamber 13, so that the blood collection tube 2 connected to the blood bag 1 housed in the vacuum blood collection chamber 13 can be pulled out. The tube holder 44 includes a tube clamp (blood collection stop means) 46 driven by a tube clamp solenoid 45, and the tube clamp 46 clamps and closes the blood collection tube 2 to stop the blood collection operation into the blood bag 1.
47 is a clamp release button for the tube clamp 46, and 48 is a clamp button for operating the tube clamp 46 in an emergency.

The display panel 12 of the blood sampling device 10 includes a blood sampling amount/vacuum degree switching indicator lamp 49, a blood sampling amount/vacuum degree switching switch 50, a 400ml/200ml switching indicator lamp 51,
400ml/200ml changeover switch 52, stop switch 5
3. Start switch 54, usage bug indicator lamp 5
5, a use bag changeover switch 56 and a blood sampling amount/vacuum degree display section 57 are provided. Note that the blood sampling device 10 is
A power switch 58 is located at the lower front of the housing 11.
and a fuse holder 59, the housing 11
A power connector 60 is provided at the bottom of the back surface.

Next, the control device 18 of the blood sampling device 10 will be explained. The control device 18 mainly includes a main control circuit 61, a drive circuit 62, and a display circuit 63, as shown in FIG. Note that 64 is a power supply unit.

The main control circuit 61 includes a CPU (central processing unit) 65 [including a memory in which a control program for a series of operations of the device 10 is written], a memory (storage means) 66, an input/output control unit 67, an LED ( It has a light emitting diode) drive circuit 68, a buzzer 69, and a failsafe circuit 70. The input/output control unit 67 is configured to transfer detection signals from the aforementioned optical sensor 40 that detects the swinging position of the bag receiving tray 19 and the blood leakage sensor 71 that detects blood leakage from the blood bag 1. It's summery.

The memory 66 is composed of a nonvolatile memory such as EA-ROM or EEP-ROM, and can read and rewrite stored data, and can hold stored data even without application of a power supply voltage. The data stored in the memory 66 includes the negative pressure generated in the vacuum blood collection chamber 13, the set amount of blood to be collected into the blood bag 1, the extended period of swinging of the bag tray 19 after blood collection is completed, and the like.

The buzzer 69 indicates the completion of blood collection, vacuum blood collection chamber 1
Error of negative pressure formed in 3, swing motor 2
3, the detection of blood leakage by the blood leakage sensor 71, etc., the sounds are made in different ways.

The failsafe circuit 70 monitors the occurrence of runaway in the CPU 65 and safely stops the device when the runaway occurs.

The drive circuit 62 is connected to the main control circuit 61 and includes an A/D conversion circuit 72. The A/D conversion circuit 72 includes the aforementioned weight sensor amplification unit 38.
At the same time, a pressure sensor 73 provided in the vacuum piping 41 and detecting the negative pressure of the vacuum blood collection chamber 13 is connected via a pressure sensor amplification circuit 74.

The drive circuit 62 also includes a solenoid drive circuit 75 that controls the tube clamp solenoid 45, a solenoid drive circuit 76 that controls the exhaust solenoid 42, a pump drive circuit 78 that turns on/off the power supply switch 77 of the vacuum pump 17, and a swing motor. A motor drive circuit 80 is provided to turn on/off the power supply switch 79 of 23.

The CPU 65 of the control device 18 obtains the detected pressure of the pressure sensor 73 and the set pressure of the vacuum blood collection chamber 13, which is data stored in the memory 66, and adjusts the vacuum so that the detected pressure matches the set pressure. As described above, the power supply switch 77 of the pump 17 is controlled on/off as shown in FIG. 7A. As a result, the negative pressure in the vacuum blood collection chamber 13 changes minutely within a constant range of the set pressure, as shown in FIG. 7B, resulting in a constant pressure state.

The drive circuit 62 also operates a mode changeover switch 81.
The operating mode of the CPU 65 can be changed as appropriate. The modes set by the mode changeover switch 81 include first blood collection mode, second blood collection mode, blood collection amount setting mode, degree of vacuum setting mode, specific gravity setting mode, rocking extension time setting mode, weight detection calibration mode, There are pressure detection calibration modes, etc.

In the first blood sampling mode, a pre-registered value previously stored in the memory 66 as the empty weight of the blood bag 1 to be used this time is called up, and the amount of blood to be collected is measured using this pre-registered value. The empty weight of the blood bag 1 to be used this time is measured this time, and the amount of blood to be collected is measured using this measured value this time.

In addition, the blood collection amount setting mode is for changing the set blood collection amount, the vacuum level setting mode is for changing the set vacuum level (negative pressure), the specific gravity setting mode is for changing the set blood specific gravity, and the rocking extension. The time setting mode is for changing the set swing extension time. To change these settings, turn on the mode changeover switch 81 to display the current set values on the display section 57, then turn on the stop switch 53 to decrease the set values, and turn on the start switch 54 to increase the set values. The changed data is written into the memory 66 by turning on the changeover switch 50, and completion of writing can be confirmed by the sound of the buzzer 69.

Further, the weight detection calibration mode is for calibrating the detection result of the scale 33, and the pressure detection calibration mode is for calibrating the detection result of the pressure sensor 73.

The display circuit 63 is connected to the main control circuit 61 and includes various indicators such as the display lamp 49 provided on the display panel 12 and the changeover switch 50 as described above.
It is configured with various switches such as.

Next, a blood sampling operation procedure using the blood sampling apparatus 10 will be described.

Turn on the power switch 58.

Select the blood collection mode. The mode changeover switch 81 selects either the first blood collection mode or the second blood collection mode described above.

The amount of blood to be collected is selected using the 400ml/200ml changeover switch 52. This setting result is shown in the switching display lamp 5.
1 is displayed.

The bag to be used is selected by the bag to be used switch 56. This selection result is displayed on the display lamp 55.
will be displayed. The types of bags used include single S, which has only a parent bag, double D, triple T, and quadruple Q, which also have one or more small bags.

Procedures for the first blood collection mode A blood collection needle provided at the end of the blood collection tube 2 is inserted into the blood donor, and a certain amount of blood is collected.

Blood bag 1 is placed in vacuum blood collection chamber 13 and placed on bag receiving tray 19, and blood collection tube 2 is set in tube holder 44.

Turn on the start switch 54. CPU65
drives and controls the vacuum pump 17 and the swing motor 23 to collect blood by reducing the pressure in the vacuum blood collection chamber 13;
The bag tray 19 is swung. Also,
The CPU 65 obtains the output of the weight sensor amplification unit 38 at the timing when the bag tray 19 temporarily stops at the lowest point, and detects the measured amount of blood collected from the blood bag 1.
Using the set blood collection volume, blood specific gravity, and pre-registered weight of blood bag 1 written in , the remaining blood collection volume (capacity) is calculated using the following formula (1).

Blood volume (ml) = [set blood collection volume (g) + pre-registered weight (g) - measured blood collection volume (g)] / specific gravity (g/ml)... (1) The CPU 65 calculates the remaining blood collection volume, which is the result of the above calculation. On condition that the amount reaches zero, the tube clamp 46 closes the blood collection tube 2 and stops the blood collection operation into the blood bag 1. At this time, the CPU 65 stops the vacuum pump 17,
And open the exhaust valve 43 to open the vacuum blood collection chamber 13.
released to the atmosphere.

After the blood collection is completed, the CPU 65 continues to drive the swing motor 23 for a certain period of time,
Swing the bag tray 19. Thereafter, the buzzer 69 notifies the end of blood collection.

The clamp release button 47 is turned on, the blood collection tube 2 is removed from the tube holder 44, and the blood bag 1 is taken out from the vacuum blood collection chamber 13.

Procedures for Second Blood Collection Mode Blood bag 1 is placed in vacuum blood collection chamber 13 and placed on bag receiving tray 19, and blood collection tube 2 is inserted into tube holder 44.

A blood collection needle provided at the end of the blood collection tube 2 is inserted into the blood donor.

Turn on the start switch 54. CPU65
obtains the output of the weight sensor amplification unit 38, measures the empty weight of the blood bag 1, and writes this to the memory 66 (or the internal memory of the CPU 65).

Turn on the start switch 54 again. As a result, the CPU 65 drives and controls the vacuum pump 17 and the swing motor 23 to collect blood by reducing the pressure in the vacuum blood collection chamber 13 and swing the bag tray 19. The CPU 65 obtains the output of the weight sensor amplification unit 38 at the timing when the bag tray 19 temporarily stops at the lowest point, detects the measured blood collection amount of the blood bag 1, and detects the blood collection settings written in the memory 66. Using the amount, blood specific gravity, and currently measured weight of blood bag 1, the remaining blood collection amount (volume) is calculated using the following equation (2).

Remaining blood collection volume (ml) = [Set blood collection volume (g) + current measured weight (g)
- Measured blood collection amount (g)]/Specific gravity (g/ml)... (2) Same as above.

Same as above.

Same as above.

In both cases, the amount of blood to be collected and the degree of vacuum during blood collection can be displayed on the display section 57 to monitor the progress of the measurement. The display amount is selected by the changeover switch 50.

Therefore, the blood sampling device 10 has a function of adjusting the negative pressure level of the vacuum blood sampling chamber 13 as described below.

That is, the CPU 65 of the control device 18 stores the detected pressure of the pressure sensor 73 in the memory 66 as described above.
The pressure in the vacuum blood collection chamber 13 is controlled so as to match the set pressure of On the condition that the predetermined normal increase rate is not reached (the amount of blood collected hardly changes), the negative pressure in the vacuum blood collection chamber 13 is controlled to be reduced by, for example, the following control method. The rate of increase in the amount of blood sampled above is
This is the rate of increase in the amount of blood collected over the elapse of measurement time, and in this embodiment, as described above, it is the rate of increase of the currently measured blood sampled amount measured at the lowest point of each swing cycle of the bag tray 19 with respect to the previously measured blood sampled amount. Calculated using

In addition to the standard set pressure P1, the memory 66 stores a secondary set pressure P2 that is lower in negative pressure level than the standard set pressure P1, and the CPU 65 sets the negative pressure in the vacuum blood collection chamber 13 to the standard set pressure P1 under the above conditions. The pressure is reduced from the secondary set pressure P2 to the above-mentioned secondary set pressure P2 (see FIG. 7A).

At this time, the CPU 65 changes the negative pressure of the vacuum blood collection chamber 13 to the standard setting pressure P1 by opening the exhaust valve 43 provided in the vacuum piping 41 mentioned above.
Control is performed to reduce the pressure from the secondary set pressure P2. According to this, the negative pressure in the vacuum blood collection chamber 13 can be quickly controlled to be reduced.

Additionally, the CPU 65 turns on/off the vacuum pump 17.
By controlling off, the negative pressure in the vacuum blood collection chamber 13 is set to the standard pressure P1 or the secondary set pressure P2.
control. According to this, the negative pressure in the vacuum blood collection chamber 13 can be controlled to a constant state without continuously operating the vacuum pump 17, and as a result, its electrical efficiency can be improved and a stable control state can always be ensured over time. .

Furthermore, in implementing the present invention, the CPU 65
Under the above conditions, the negative pressure in the vacuum blood collection chamber 13 is controlled to be reduced stepwise from the set pressure, and the reduction control operation is executed until the rate of increase in the amount of blood sampled measured by the scale 33 reaches the normal rate of increase. Accordingly, the negative pressure in the vacuum blood collection chamber 13 may be controlled to be reduced.

Next, the operation of the above embodiment will be explained.

According to the above embodiment, the target level of the negative pressure generated in the vacuum blood collection chamber 13 is set as the set pressure in the memory 66.
At the same time, the actual pressure in the vacuum blood collection chamber 13 is detected by the pressure sensor 73, and the CPU 65
The pressure in the vacuum blood collection chamber 13 is controlled so that the detected pressure matches the set pressure. at the same time,
The amount of blood drawn into blood bag 1 is measured, and the CPU 65
is based on the condition that the increase rate of the measured blood collection amount does not reach the predetermined normal increase rate when the detected pressure has reached the set pressure. The negative pressure in the vacuum blood collection chamber 13 is controlled to be lower than the set pressure. Thereby, the blood collection suction is automatically adjusted to a level that allows blood collection (for example, a level that allows natural blood collection). Therefore, regardless of the diameter of the donor's blood vessels, blood can always be stably collected, and blood can be collected smoothly even from donors with thin blood vessels, although it takes some time.

Here, according to the negative pressure level reduction control method described above, the blood collection suction force can be automatically adjusted to a level that allows blood collection immediately.

Further, according to the above-described negative pressure level reduction control method, it is possible to reduce the amount of reduction in the blood collection suction force to the necessary minimum.

By the way, in implementing the present invention, claim 1
As described in , the amount of blood collected into Blood Bag 1 is measured, and the only condition is that the rate of increase in the measured amount of blood collected does not reach the predetermined normal rate of increase. The negative pressure in the vacuum blood collection chamber 13 may be controlled to be lower than the set pressure.

The present invention also relates to a measuring method of a blood sampling amount measuring means,
The pressure adjustment method of the vacuum blood collection chamber can be widely applied to any blood collection device.

[Effects of the Invention] As described above, according to the present invention, blood can always be collected stably regardless of the diameter of the donor's blood vessels.

[Brief explanation of drawings]

FIG. 1 is a front view showing a blood sampling device according to an embodiment of the present invention, FIG. 2 is a side view showing a main part of FIG. 1 broken away, FIG. The figure is the first
Fig. 5 is a diagram of the vacuum circuit, Fig. 6 is the control block diagram, and Fig. 7 is the on/off control state of the vacuum pump and the pressure state of the vacuum blood collection chamber. It is a line diagram. 1...Blood bag (blood container), 10...Blood collection device, 13...Vacuum blood collection chamber, 17...Vacuum pump, 33...Weigher (blood sampling amount measuring means), 41...Vacuum piping, 43...Exhaust Valve, 65...CPU (control means), 66...Memory (storage means), 73...
pressure sensor.

Claims (1)

[Scope of Claims] 1. A vacuum blood collection device that is equipped with a vacuum blood collection chamber that is depressurized by a vacuum pump and in which a blood container is set, and that collects blood into the blood container using negative pressure generated in the vacuum blood collection chamber. The negative pressure in the vacuum blood collection chamber is reduced from the above set pressure on the condition that the blood collection amount measuring means measures the amount of blood collected into the container and the increase rate of the measured value of the blood collection amount measuring means does not reach a predetermined increase rate. A vacuum blood sampling device equipped with a negative pressure level adjustment function, characterized in that it has a control means for controlling. 2. A pressure sensor that detects the pressure in the vacuum blood collection chamber;
The control means further includes a storage means for storing a set pressure to be generated in the vacuum blood collection chamber, and the control means obtains the detected pressure of the pressure sensor, the set pressure of the storage means, and the measured value of the blood collection amount measuring means, and controls the pressure sensor. The pressure in the vacuum blood sampling chamber is controlled so that the detected pressure matches the set pressure in the storage means, and the measured value of the blood sampling amount measuring means is controlled while the detected pressure of the pressure sensor reaches the set pressure in the storage means. The vacuum blood collection with a negative pressure level adjustment function according to claim 1, wherein the negative pressure in the vacuum blood collection chamber is controlled to be lower than the set pressure on the condition that the increase rate does not reach a predetermined increase rate. Device. 3. The vacuum blood collection device with a negative pressure level adjustment function according to claim 1 or 2, wherein the control means controls the negative pressure in the vacuum blood collection chamber to a set pressure by controlling a vacuum pump on/off. 4. The storage means stores, in addition to the standard set pressure, a secondary set pressure having a lower negative pressure level than the standard set pressure, and the control means changes the negative pressure of the vacuum blood collection chamber from the standard set pressure to the above under the conditions. 4. The vacuum blood sampling device with a negative pressure level adjustment function according to claim 2 or 3, wherein the vacuum blood sampling device is configured to reduce the pressure to a secondary set pressure. 5. The control means controls the negative pressure in the vacuum blood collection chamber to be reduced stepwise from the set pressure under the conditions, and reduces the negative pressure in the vacuum blood collection chamber until the rate of increase in the measured value of the blood collection amount measuring means reaches the predetermined rate of increase. 4. The vacuum blood sampling device equipped with a negative pressure level adjustment function according to claim 1, wherein the vacuum blood sampling device executes a control operation. 6. Any one of claims 1 to 5, wherein the vacuum piping connecting the vacuum pump and the vacuum blood collection chamber is provided with an exhaust valve, and the control means controls to reduce the negative pressure in the vacuum blood collection chamber by opening the exhaust valve. A vacuum blood sampling device equipped with a negative pressure level adjustment function as described above.