JPH01288235A - Blood collector capable of setting/storing blood collecting quantity - Google Patents

Abstract

PURPOSE:To easily reset a set blood collecting quantity to a blood container and to correctly obtain a prescribed blood collecting quantity by stopping a blood collecting action to the blood container with a blood collection stopping means on conditions that the measurement result of a blood collecting quantity measuring means attains to the set blood collecting quantity. CONSTITUTION:The set blood collecting quantity inputted by switches 50, 52, 53, 54 and 56 of a display panel 12 is stored into a memory 66, the blood collecting quantity to a blood bag 1 is measured by a balance, and a timing, by which a measured value attains to the set blood collecting quantity, is supervised by a CPU 65. When the value attains to the above-mentioned timing, the CPU 65 drives a tube clamp 46, and the blood collecting action to the blood bag 1 is stopped. Consequently, the set blood collecting quantity to the blood bag 1 can be adjusted by rewriting the stored data of the memory 66, and it can be easily reset. At such a time, since the memory 66 is non-volatile, even when a power source is disconnected due to an outage, etc., the set blood collecting quantity is not erased, and the blood collection in the same set blood collecting quantity can be repeatedly executed as long as the quantity is not rewritten.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blood sampling device that can set and store the amount of blood to be collected into a blood sampling container.

[Prior Art] Conventionally, a blood sampling device as described in Japanese Patent Publication No. 51-3153 has been proposed. A conventional blood sampling device stores a blood bag in a blood sampling chamber, uses a limit switch to detect when the expansion of the blood bag due to blood sampling reaches a predetermined level, and stops the blood sampling operation based on this detection result.
As a result, a predetermined amount of blood is secured in the blood bag.

Here, conventional blood sampling devices generally have a set blood sampling amount of 20
0 ■ (small amount setting value) and 400 ■! There are two types of L (large amount setting value), and these can be set by adjusting the activation timing of the above-mentioned limit switch by mechanical operation.

[Problem to be solved by the invention [1] By the way, the above-mentioned set blood collection amount is not necessarily fixed in two ways, 200 and 400, but can be finely adjusted depending on the purpose of blood collection, etc. , ■It is necessary to make fine adjustments depending on the type of blood bag used.

However, changing the setting of the amount of blood to be collected using a conventional blood collecting device involves adjusting the activation timing of a limit switch by mechanical operation as described above, and is not necessarily easy.

SUMMARY OF THE INVENTION An object of the present invention is to enable the set amount of blood to be collected into a blood container to be easily changed and to accurately obtain a predetermined amount of blood to be collected.

[Means for Solving the Problems] The present invention as set forth in claim 1 provides a blood collection device for collecting blood into a blood container, which includes a blood collection amount measuring means for measuring the amount of blood collected into the blood container; A blood collection stop means for stopping the blood collection operation, an input means for inputting the set blood collection amount into the blood container, and a state in which the input set blood collection amount is stored, the stored data can be rewritten and read, and the main power is turned off. By obtaining a storage means in which the stored data does not disappear even when the data is stored, and the measurement result of the blood sampling amount measuring means and the data of the set blood sampling amount stored in the storage means, the measurement result of the blood sampling amount measuring means is set to the set blood sampling amount. and control means for causing the blood collection stop means to stop the blood collection operation into the blood container on the condition that the blood collection stop means has reached the blood collection state.

According to a second aspect of the present invention, the blood collection amount measuring means measures the blood collection amount by measuring the weight of the blood container.

According to a third aspect of the present invention, the blood collection stop means closes a blood collection tube connected to a blood container.

According to a fourth aspect of the present invention, the storage means stores a set amount of blood to be collected depending on the capacity of the blood container used.

According to a fifth aspect of the present invention, the storage means stores a plurality of set amounts of blood to be collected, ranging from a small amount to a large amount, for each type of blood container used.

[Operation] According to the present invention as set forth in claim 1, the set blood collection amount inputted by the input means is stored in the storage means, and the blood collection amount into the blood container is measured by the blood collection amount measuring means, and the control is performed. The means monitors the timing at which the measurement result reaches the set blood collection amount. Then, when the above timing is reached, the control means drives the blood collection stop means to stop the blood collection operation into the blood container.

Therefore, according to the first aspect of the present invention, the set amount of blood to be collected into the blood container can be adjusted by rewriting the data stored in the storage means, and the setting can be easily changed. At this time, the set blood collection amount stored in the storage means is not erased even if the main power is turned off due to a power outage or the like, and the same set blood collection amount can be repeatedly collected unless rewritten.

According to the second aspect of the present invention, the amount of blood to be collected is measured by measuring the weight of a blood container, and the amount of blood to be collected can be accurately measured and a predetermined amount of blood can be accurately obtained.

According to the present invention as set forth in claim 3, the blood collection operation is stopped by closing the blood collection tube, so that the blood collection can be stopped immediately when the blood collection amount reaches a set value, and the predetermined blood collection amount can be accurately obtained. I can do it.

According to the present invention as set forth in claim 4, it is possible to accurately obtain the desired amount of blood to be collected depending on the capacity of the blood container used.

According to the invention as set forth in claim 5, a small amount (for example 200
It is possible to accurately obtain a desired amount of blood collection ranging from 8M) to a large amount (for example, 400M).

[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. 4 is a cutaway plan view of the main part of FIG. 1, FIG. 5 is a vacuum circuit diagram, and FIG. 6 is a control block diagram.

As shown in FIGS. 1 to 4, the blood sampling device 10 includes a display panel 12 on the front of the housing 11.
A vacuum blood collection chamber 13 is formed inside. 14 is the opening/closing lid of the blood collection chamber 13, 15 is the hinge of the lid 14, and 16 is the blood collection chamber 1.
This is a sealing rubber for sealing 3. 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 communicated with the inlet port 17A of the vacuum pump 17 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 IO is
While the pressure in the vacuum blood collection chamber 13 is reduced, a predetermined negative pressure is applied to the blood bag l supported on the bag receiving tray 19 to collect blood. At this time, the blood collection device 10 shakes the bag tray 19 to stir the blood and an anticoagulant such as heparin that is preloaded in the blood bag 1, and also collects blood by measuring the weight of the blood bag 1. measure quantity.

Blood collection? The structure for swinging the bag tray 19 described above and the structure for measuring the weight of the blood bag 1 in tzio are as follows.

First, a pedestal 20 is installed at the bottom of the vacuum blood collection chamber 13.
A swing frame 22 that is rotatable is supported on this pedestal 20 via a support shaft 21 .

Further, a swing motor 23 is fixed to the pedestal 20, and a driving shaft 24 driven by the swing motor 23 is supported. 25.26 is a toothed pulley.

27 is a toothed belt. A crank wheel 28 is fixed to one end of the driving shaft 24, one end of a link 29 is connected to the rotation radius of the crank wheel 28, and the other end of the link 29 is connected to a connecting piece 30 integral with the swing frame 22. connected.

On the other hand, a pair of scale mounting blocks 31 are fixed to the upper surface of the swinging frame 22, and a scale (blood sampling amount measuring means) 33 is mounted on a support plate 32, which is connected to the ends of both mounting blocks 31.
is cantilevered. 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. The above-mentioned bag tray 19 is fixed thereto.

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 IO 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 attaching the scale 33 to the swing frame 22.
This means that the bag tray 19, which is supported through the bag tray 19, is swung. In addition, in the blood sampling device 10, the bag tray 19 is supported on a scale 33 which is cantilever-supported on the swing frame 22 via a mounting block 31 and a support plate 32. The weight of the sample is measured, and thus the amount of blood collected is measured.

The blood sampling device IO detects the rotational position of the detection cam 39 provided at the other end of the driving shaft 24 using the optical sensor 40,
As a result, the swing motor 23 is driven and controlled, and the bag receiver @ 19 is stopped at the lowest point (bottom dead center) and held under a constant posture condition, and the blood is transferred as described above. The weight of bag 1 is to be measured.

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 through a vacuum pipe 41, and connects the vacuum pipe 41 to an intermediate portion thereof which is closed by turning on an exhaust solenoid 42. , an exhaust valve 43 that opens by gravity when the exhaust solenoid 42 is turned off. Blood sampling device 11
0, a constant negative pressure (degree of vacuum) is formed in the vacuum blood collection chamber 13 by on/off control of the vacuum pump 17, and when blood collection is completed, the vacuum blood collection chamber 13 is released to the atmosphere by opening the exhaust valve 43.

The blood collection device 10 includes a groove-shaped 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 l accommodated in the vacuum blood collection chamber 13 can be pulled out. It is said that The tube holder 44 has a tube clamp solenoid 45.
Tube clamp (blood collection stop means) driven by 4
6, the tube clamp 46 clamps and closes the blood collection tube 2 to stop the blood collection operation into the blood bag l.

47 is a clamp release button of the tube clamp 46;
8 is a clamp button that operates the tube clamp 46 in an emergency.

The display panel 12 of the blood sampling device IO includes a blood sampling amount/vacuum degree switching display lamp 49. Blood collection amount/vacuum degree selection switch 50.4
00+*Jl/200■ Replacement display lamp 51,
400s replacement 7200■ Replacement switch 52, stop switch 53, start switch 54, used bag indicator lamp 55
, a switch 56 for selecting two bars to be used, and a blood collection amount/degree of vacuum display section 57. Note that the blood sampling device 10 has a housing 1
Power switch 58 and fuse holder 59 are located at the bottom of the front of 1.
and a power connector 60 at the bottom of the back of the housing 11.
Equipped with.

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) [device 10
65, memory (storage means) 66, input/output control unit 67, LED (light emitting diode) drive circuit 6
8, a buzzer 69, and a fail-safe circuit 70. In addition, each detection signal of the above-mentioned optical sensor 40 which detects the rocking position of the bag tray 19 and the crosspiece sensor 71 which detects blood leakage from the blood bag 1 is transferred to the input/output control unit 67. It has become.

The memory 66 is composed of a non-volatile memory such as EA-ROM or EEP-ROM, and can rewrite and read stored data, and can hold stored data even without application of a power supply voltage. The data stored in the memory 66 includes (1) the negative pressure generated in the vacuum blood collection chamber 13, (2) the set amount of blood to be collected from the blood bar 2, and (2) the extended period of swinging of the bag tray 19 after blood collection is completed.

The buzzer 69 sounds in different ways depending on the following: ■ Blood collection is completed, ■ An error in the negative pressure formed in the vacuum blood collection chamber 13, ■ An error in the rotation of the swing motor 23, ■ Inadvertent detection of the crosspiece sensor 71, etc. do.

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
/D conversion circuit 72 is provided. The above-mentioned weight sensor amplification unit 38 is connected to the A/D conversion circuit 72, and the pressure sensor 73, which is installed in the vacuum piping 41 and detects the negative pressure in the vacuum blood collection chamber 13, is connected to the pressure sensor amplification circuit 72.
Connected via 4.

The drive circuit 62 also includes: (1) a solenoid drive circuit 75 that controls the tube clamp solenoid 45; (2) a solenoid drive circuit 76 that controls the exhaust solenoid 42;
(1) A pump drive circuit 78 that turns on/off the power supply switch 77 of the vacuum pump 17; (2) A motor drive circuit 8o that turns on/off the power supply switch 79 of the swing motor 23.

Note that the CPU 65 of the W control device 18 controls the pressure sensor 7.
3 and the set pressure of the vacuum blood collection chamber 13, which is the data stored in the memory 66, turn on the power supply switch 77 of the vacuum pump 17 as described above so that the detected pressure matches the set pressure. /Off control.

Further, the drive circuit 62 includes 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, ■Vacuum level setting mode, ■Specific gravity setting mode, ■Obcillation extension time setting mode, and ■ There are weight detection calibration mode, pressure detection calibration mode, etc.

In the first blood collection mode, a pre-registered value stored in the memory 66 in advance 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. These settings can be changed by displaying their current setting values on the display section 57 by turning on the mode changeover switch 81, decreasing the setting values by turning on the stop switch 53, and increasing the setting values by turning on the start switch 54. Then, by turning on the changeover switch 50, the changed data is written into the memory 66, and the completion of writing can be confirmed by the sound of the buzzer 69.

Further, the weight Hiyama 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 various switches such as the changeover switch 50 as described above.

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 is used to select either the first blood collection mode or the second blood collection mode described above.

■400■ Select the amount of blood to be collected using the 1/200 layer exchange changeover switch 52. This selection result is displayed on the switching display lamp 51.

■Select the bag to be used using the bag selection switch 56. This selection result is displayed on the display lamp 55. The types of bags used are single (S) with only a parent bag, double (D) with one or more small bags,
) There are ripples (T) and quadruples (Q).

■Procedure 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.

■Put the blood bag l into the vacuum blood collection chamber 13 and bag receiver tray 1.
9 and set the blood collection tube 2 in the tube holder 44.

■Turn on the start switch 54. The CPU 65 drives and controls the vacuum pump 17 and the swing motor 23 to operate the vacuum blood collection chamber 13.
Collecting blood by reducing the pressure and shaking the bag tray 19.
Further, the CPU 65 obtains the output of the 1-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 writes it into the memory 66. Using the set specific gravity of 1L blood to be collected and the pre-registered weight of blood bag 1, perform the following (1
) Calculate the remaining blood collection amount (volume) using the formula.

Remaining blood sampling amount (1 sentence) = [Setting blood sampling amount (g) Bank registration weight (g) - Measured blood sampling amount (
g) ] /Specific gravity/■dan)...(1)■CPU8
Step 5 closes the blood collection tube 2 with the tube clamp 46 and stops the blood collection operation into the blood bag 1, on the condition that the remaining blood collection amount, which is the result of the above calculation, reaches zero. At this time, the CPU 65 stops the vacuum pump 17 and opens the exhaust valve 43 to release the vacuum blood collection chamber 13 to the atmosphere.

(2) After the blood collection is completed, the CPU 65 extends and drives the swing motor 23 for a predetermined period of time to swing the bag tray 19. Thereafter, the buzzer 69 notifies the end of blood collection.

(2) Turn on the clamp release button 47, remove the blood collection tube 2 from the tube holder 44, and take out the blood bag l from the vacuum blood collection chamber 13.

■Procedure for the second blood collection mode■Put the blood bag l into the vacuum blood collection chamber 13 and bag receiver 1.
9 and set the blood collection tube 2 in the tube holder 44.

■Puncture the blood donor with the blood collection needle provided at the end of the blood collection tube 2.

■Turn on the start switch 54. The CPU 65 obtains the output of the weight sensor amplification unit 38, measures the empty weight of the blood bag I, and writes this in the memory 66 (or the memory inside the CPU 65).

■Turn on the start switch 54 again. As a result, C.P.
U65 is a vacuum pump 17.4i! The CPU 85 drives and controls the moving motor 23 to collect blood by reducing the pressure in the vacuum blood collection chamber 13 and to swing the bag tray 19.
At the timing when the weight sensor 1 pauses at the lowest point, the output of the weight sensor amplification unit 38 is obtained, and the measured amount of blood collected from the blood bag 1 is detected.

Using the set blood collection amount, blood specific gravity, and current measured weight of blood bag 1 written in the memory 66, perform the following (2).
Calculate the remaining blood collection amount (volume) using the formula.

Remaining blood collection volume (ml) = [Set blood collection volume (g) 10th measurement weight (g) - Measured blood collection volume (g)] /Specific gravity/■i)...(2)■■ Above
Same as ■.

■Same as ■■ above.

■Same as ■■ above.

In both cases (1) and (2) above, the amount of blood to be collected and the degree of vacuum during blood collection are displayed on the display section 57, and the 0 display amount that allows the progress of the measurement to be monitored is selected by the changeover switch 50.

According to the present invention, as described above, the set amount of blood to be collected into the blood bag 1 can be stored in the memory 66 which is a non-volatile memory.
The data stored in the memory 66 can be rewritten by storing the data in the blood collection amount setting mode and switching the mode changeover switch 81 to the blood sampling amount setting mode. Here, the memory 66 has a 200 m1 level (approximately 200 m1) for each type of blood bag used.
Two blood sampling amounts are memorized: 400 blood sampling level (about 400 blood sampling level) and 400 blood sampling level.

The procedure for setting the amount of blood to be collected in the memory 66 is performed as follows.

■Switch the mode changeover switch 81 to the blood sampling amount setting mode. As a result, the currently set blood sampling amount is displayed on the display 5.
7 is displayed.

■400 @ 400 @ Standing / 2GO @ Immunity switch 520
Select either 0 intestinal level or 400 intestinal level,
And the bag to be used is selected by the bag to be used changeover switch 56. The selection results are displayed on display lamps 51.55.

■Turn on the stop switch 53 to reduce the current set value,
Alternatively, turn on the start switch 54 to increase the current set value. As a result, the desired setting value is obtained on the display section 57.

(2) Turn on the changeover switch 50 and write the blood collection amount set in (2) above into the memory 66.

■ Confirm the completion of writing by the sound of the buzzer 69.

This results in 1.220+ for a single bag, for example.
s sentence and 410 ■ intersection, double bag with 210 intestinal intersection and 430 ■ intersection, triple bag with 205 intestinal intersection and 415 intersection, quadruple bag with 225 m
You can set the 1st and 420th layer parties respectively.

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

According to the above embodiment, the switch 50 of the display panel 12.
52, 53, 54, and 56 are stored in the memory 66, the amount of blood collected into the blood bag l is measured by the scale 33, and the CPU 65 determines the timing when the measured value reaches the set blood collection amount. It will be monitored. Then, when the above timing is reached, the CPU 65 drives the tube clamp 46 to stop the operation of collecting blood into the blood bag I.

Therefore, the set amount of blood to be collected from the blood bag 1 can be adjusted by rewriting the data stored in the memory 66, and can be easily changed. At this time, since the memory 66 is non-volatile, even if the power is turned off due to a power failure or the like, the set blood collection amount is not erased, and the same set blood collection amount can be repeatedly collected unless rewritten.

The scale 33 serving as a blood sampling amount measuring means measures the blood sampling amount by measuring the weight of the blood bag 1, and can accurately measure the blood sampling amount and accurately obtain a predetermined blood sampling amount.

The tube clamp 46 serving as a blood sampling stop means stops the blood sampling operation by closing the blood sampling tube 2, and can stop blood sampling immediately when the blood sampling amount reaches a set value, thereby accurately obtaining a predetermined blood sampling amount. be able to.

The memory 66 stores the set amount of blood to be collected according to the capacity of the blood bag I used, and it is possible to accurately obtain the desired amount of blood to be collected according to the capacity of the blood bag.

The memory 66 stores the set blood collection amount of 2 (10 m cross level and 400 theory λ level) for each type of blood bag used, and can accurately determine the desired blood collection amount from small to large amount for each blood bag. Obtainable.

Note that the present invention can be widely applied to any blood sampling apparatus in which the measuring method of the blood sampling amount measuring means and the stopping method of the blood sampling stopping means are applicable.

In addition, in implementing the present invention, voltage application for data retention is maintained by a sub-battery or the like as a storage means,
Volatile memory, which performs the same functions as non-volatile memory, can also be used.

[Effects of the Invention] As described above, according to the present invention, the set amount of blood to be collected into a blood container can be easily changed, and a predetermined amount of blood can be accurately obtained.

[Brief explanation of the drawing]

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 a plan view showing the main part of FIG. 1 broken away, FIG. 5 is a vacuum circuit diagram, and FIG. 6 is a control block diagram. 1... Blood bag (blood container), 10... Blood sampling device, 33... 14 (blood sampling amount measuring means), 46... Tube clamp (blood sampling stopping means), 50.
52.53.54.56...Switch (input means), 65...CPU (control means), 66...Memory (storage means).

Claims (5)

[Claims] (1) In a blood collection device for collecting blood into a blood container,
A blood collection amount measuring means for measuring the amount of blood collected into the blood container, a blood collection stop means for stopping the blood collection operation into the blood container, an input means for inputting a set blood collection amount into the blood container, and an input set blood collection amount. A storage means that stores the amount of blood and can rewrite and read the stored data, and the stored data does not disappear even when the main power is turned off, and a set amount of blood that is stored in the storage means and the measurement results of the blood collection amount measuring means. and control means for stopping the blood sampling operation into the blood container by the blood sampling stop means on condition that the measurement result of the blood sampling amount measuring means reaches the set blood sampling amount. A blood sampling device that can set and store the amount of blood to be collected. (2) A blood sampling device capable of setting and storing the amount of blood to be collected according to claim 1, wherein the blood collection amount measuring means measures the amount of blood to be collected by measuring the weight of the blood container. (3) A blood sampling device capable of setting and storing a blood sampling amount according to claim 1, wherein said blood sampling stopping means closes a blood sampling tube connected to a blood container. (4) A blood sampling device capable of setting and storing the amount of blood to be collected according to claim 1, wherein the storage means stores a set amount of blood to be collected according to the capacity of the blood container used. (5) A blood sampling device capable of setting and storing a blood sampling amount according to claim 1, wherein the storage means stores a plurality of set blood sampling amounts ranging from a small amount to a large amount for each type of blood container used.