JPH07148249A - Blood taking device - Google Patents

Abstract

PURPOSE:To reduce a display space by making selective display of plural measured values with one display section of a blood taking device. CONSTITUTION:The display panel 12 of the blood taking device is provided with a switch 50 for switching the display of at least a vacuum degree and the measured value of a blood taking amt., by which the common use of the display section 57 is made possible and the display space of the display panel 12 is remarkably reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood collecting device, preferably a vacuum blood collecting device, for collecting blood in a blood container.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a vacuum blood sampling apparatus as described in Japanese Patent Publication No. 51-3153. The vacuum blood collection device is decompressed by a vacuum pump and includes a vacuum blood collection chamber in which the blood container is set, and blood is collected in the blood container by negative pressure generated in the vacuum blood collection chamber.

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

[0004]

By the way, in the above-mentioned apparatus, the display of the measured amount such as the degree of vacuum in the vacuum blood collection chamber and the amount of blood collected has been done by separate display panels. Therefore, a relatively large operation panel is required, which hinders downsizing and weight reduction of the device.

According to the present invention, a plurality of measurement values are switched and displayed on a single display unit of a blood sampling apparatus, the display space for items that are less frequently checked is reduced, the operation panel space is reduced, and the entire apparatus is reduced in size. An object of the present invention is to provide a blood sampling device that can be made lightweight.

[0006]

According to a first aspect of the present invention, in a blood sampling apparatus for collecting a predetermined amount of blood in a blood container, a display unit capable of switching and displaying at least two measured values, and the switching. It is provided with a switch means for performing.

According to a second aspect of the present invention, the blood collecting apparatus further comprises negative pressure generating means for generating negative pressure in the blood collecting chamber for collecting blood in the blood container, and the negative pressure generating means is provided in the blood container. The blood sampling amount measuring means and the vacuum degree measuring means of the blood sampling chamber are provided, and the at least two measurement amounts include the vacuum degree and the blood sampling amount.

[0008]

1 is a front view showing a blood collecting device according to an embodiment of the present invention, FIG. 2 is a side view showing a main part of FIG. 1 in a cutaway manner, FIG. 3 is a plan view of FIG. 1, and FIG. 1 is a plan view showing a main portion of FIG. 1 in a broken manner, FIG. 5 is a vacuum circuit diagram, FIG. 6 is a control block diagram, and FIG.
FIG. 3 is a diagram showing an ON / OFF control state of a vacuum pump and a pressure state of a vacuum blood collection chamber.

The blood collecting device 10 is, as shown in FIGS.
A display panel 12 is provided on the front view of the housing 11, and a vacuum blood collection chamber 13 is formed inside the housing 11. 1
Reference numeral 4 denotes an opening / closing lid of the blood collection chamber 13, 15 denotes a hinge of the lid 14, 16
Is a sealing rubber for sealing the blood collection chamber 13. 14A
Is a handle of the lid 14. Further, the blood collection device 10 has a vacuum pump 17 and a control device 18 built-in at the bottom of the housing 11.

The vacuum blood collection chamber 13 of the blood collection device 10 is connected to the suction port 17A of the vacuum pump 17 so that the pressure can be reduced, and the back tray 19 for supporting the blood bag (blood container) 1 made of polyvinyl chloride or the like. Is equipped with. The blood collecting device 10 applies a predetermined negative pressure to the blood bag 1 supported by the bag tray 19 to collect blood while the vacuum blood collecting chamber 13 is depressurized. At this time, the blood collecting device 10 shakes the bag tray 19 to stir the anticoagulant such as heparin loaded in the blood bag 1 in advance and the blood, and measures the weight of the blood bag 1 to collect the blood. Measure the quantity.

The above-mentioned bag tray 1 in the blood collecting device 10
The structure for swinging 9 and the structure for measuring the weight of blood bag 1 are as follows.

First, a pedestal 20 is attached to the bottom of the vacuum blood collection chamber 13.
An oscillating frame 22 that is rotatable is supported on the gantry 20 via a support shaft 21. A swing motor 23 is fixed to the gantry 20, and a driving shaft 24 driven by the swing motor 23 is supported. Two
Reference numerals 5 and 26 are toothed pulleys, and 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 on the turning radius of the crank wheel 28, and the other end of the link 29 is connected to a connecting piece 30 integrated with the swing frame 22. It is connected.

On the other hand, a pair of scale mounting blocks 31 are fixed to the upper surface of the swing frame 22, and a scale (sample amount measuring means) 33 is placed on the support plate state 32 which is bridged between the ends of the mounting blocks 31. Supported. Scale 33 is on the top 2
A strain gauge 34 is attached to each of the two positions of the position and the lower surface to form a Wheatstone bridge circuit, and a strain gauge 34 is provided at the tip of the scale 33.
The bag tray 19 is fixed via the receiving plate 36. 37 is a stopper for preventing the balance 33 from swinging to the left and right, and 3
Reference numeral 8 is a weight sensor amplification unit.

That is, the blood collecting device 10 includes the swing motor 2
The drive shaft 24 and the crank wheel 28 are rotated by the operation of 3.
As a result, the swing frame 22 is swung, and the bag tray 19 supported by the swing frame 22 via the scale 33 is swung. The blood collecting device 10 also supports the bag tray 19 on a scale 33 that is cantilevered on the swing frame 22 via a mounting block 31 and a support plate 32, and the blood bag 1 is deformed by the flexure deformation of the scale 33.
Is weighed, and then the blood collection amount is measured. The blood sampling device 10 detects the rotational position of the detection cam 39 provided at the other end of the drive shaft 24 by the optical sensor 40, and thereby drives and controls the swing motor 23 to drive the bag tray 19 above.
It is supposed that the weight of the blood bag 1 is measured as described above under the condition that is temporarily stopped at the lowest point (bottom dead center) and is held under a constant posture condition.

As shown in FIG. 5, the blood collecting apparatus 10 connects the suction port 17A of the vacuum pump 17 and the vacuum blood collecting 13 to the vacuum piping 4 as shown in FIG.
1, the exhaust pipe 43 is provided at an intermediate portion of the vacuum pipe 41. The exhaust pulp 43 is closed by turning on the exhaust solenoid 42 and opened by gravity by turning off the exhaust solenoid 42. The blood collection device 10 forms a constant negative pressure (vacuum degree) in the vacuum blood collection chamber 13 by controlling the on / off of the vacuum pump 17, and opens the exhaust pulp 43 at the end of blood collection to open the vacuum blood collection chamber 1.
Release 3 to the atmosphere.

The blood collection device 10 is provided with a tube holder 44 at a portion adjacent to the vacuum blood collection chamber 13 on the upper part of the front side of the housing 11 and can draw out the blood collection tube 2 connected to the blood bag 1 housed in the vacuum blood collection chamber 13. I am trying. The tube holder 44 includes a tube clamp (blood collection stopping means) 46 driven by a tube clamp solenoid 45. The tube clamp 46 closes the blood collection tube 2 by clamping and stops the blood collection operation in the blood bag 1. Reference numeral 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 display lamp 49, a blood sampling volume / vacuum degree switching switch 50, and a 400 ml / 200 ml switching display lamp 5.
1, a 400 ml / 200 ml changeover switch 52, a stop switch 53, a start switch 54, a used bag display lamp 55, a used bag changeover switch 56, and a blood collection amount / vacuum degree display portion 57. The blood collection device 10 includes a power switch 58 and a fuse holder 5 on the lower front surface of the housing 11.
9, and a power connector 6 on the lower rear portion of the housing 11.
Equipped with 0.

Next, the control device 18 of the blood collecting device 10 will be described. As shown in FIG. 6, the control device 18 mainly includes a main control circuit 61, a drive circuit 62, and a display circuit 63. In addition, 64 is a power supply unit.

The main control circuit 61 includes a CPU (central processing unit) [including a memory in which a control program for a series of operations of the device 10 is written] 65, a memory (storage means) 66, an input / output control section 67, It has an LED (light emitting diode) drive circuit 68, a buzzer 69, and a fail-safe circuit 70. It should be noted that the detection signals of the above-mentioned optical sensor 40 for detecting the swing position of the bag tray 19 and the blood leak sensor 71 for detecting blood leak from the blood bag 1 are transferred to the input / output control unit 67. Has become.

The memory 66 is EA-ROM, EEP-
It is composed of a non-volatile memory such as a ROM and can rewrite and read the stored data, and can retain the stored data without applying a power supply voltage. Data stored in the memory 66 include negative pressure generated in the vacuum blood collection chamber 13, a set blood collection amount in the blood bag 1, and the bag tray 1 after the blood collection is completed.
9 rocking extension time, etc.

The buzzer 69 completes blood collection, an error in the negative pressure formed in the vacuum blood collection chamber 13, and the swing motor 23.
Rotation error, blood leak detection of blood leak sensor 71, etc.
Sounds in different ringing modes.

The fail-safe circuit 70 is a CPU 65.
Monitor the occurrence of runaway and stop the device to the safe side 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 weight sensor amplification unit 38 described above is connected to the A / D conversion circuit 72, and the pressure sensor 73 that is provided in the vacuum pipe 41 and detects the negative pressure of the vacuum blood collection chamber 13 operates as the pressure sensor amplification circuit 74. Connected through.

The drive circuit 62 is a solenoid drive circuit 7 for controlling the tube clamp solenoid 45.
5, a solenoid drive circuit 76 for controlling the exhaust solenoid 42, a pump drive circuit 78 for turning on / off the power supply switch 77 of the vacuum pump 17, the swing motor 2
A motor drive circuit 80 for turning on / off the power feeding switch 79 of No. 3 is provided.

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

Further, the drive circuit 62 is provided with a mode changeover switch 81 so that the operation mode of the CPU 65 can be changed appropriately. The modes set by the mode changeover switch 81 include a first blood sampling mode, a second blood sampling mode, a blood sampling amount setting mode, a vacuum degree setting mode, a specific gravity setting mode, a swing extension time setting mode, a weight detection calibration mode, and pressure detection. There is a calibration mode etc.

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

Further, the blood collection amount setting mode changes the setting blood collection amount, the vacuum degree setting mode changes the setting vacuum degree (negative pressure), and the specific gravity setting mode changes the setting blood specific gravity. The rocking extension time setting mode is for changing the setting of the rocking extension time. To change these settings, the mode changeover switch 81 is turned on to display the current set values on the display unit 57, and then the stop switch 53 is turned on to reduce the set values, and the start switch 5
When the switch 4 is turned on, the set value is increased, and when the changeover switch 50 is turned on, the changed data is written in the memory 66.
The completion of writing can be confirmed by the sound of the buzzer 69.

The weight detection calibration mode is for calibrating the detection result of the balance 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 has 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. It

Next, a procedure for collecting blood by the blood collecting apparatus 10 will be described.

The power switch 58 is turned on.

A blood collection mode is selected. Either the first blood sampling mode or the second blood sampling mode described above is selected by the mode changeover switch 81.

The blood collection amount is selected by the 400 ml / 200 ml changeover switch 52. The setting result is displayed on the switching display lamp 51.

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

Procedure of First Blood Collection Mode a A blood donor is provided at the end of the blood collection tube 2 to puncture a blood donor to collect blood to some extent.

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

C The start switch 54 is turned on. CPU
65 drives and controls the vacuum pump 17 and the swing motor 23,
Blood is collected by depressurizing the vacuum blood collection chamber 13 and the bag tray 19 is swung. Further, the CPU 65 obtains the output of the weight sensor amplification unit 38 to detect the measured blood sampling amount of the blood bag 1 at the timing when the bag tray 19 is temporarily stopped at the lowest point, and is written in the memory 66. Using the set blood collection amount, the blood specific gravity, and the pre-registered weight of the bag 1, the remaining blood collection amount (volume) is calculated by the following mathematical expression 1.

[0039]

[Equation 1]

D The CPU 65 provides the tube clamp 4 on condition that the residual blood collection amount, which is the above calculation result, has reached zero.
The blood collection tube 2 is closed by 6 to stop the blood collection operation for the blood bag 1. At this time, the CPU 65 uses the vacuum pump 1
7 is stopped and the exhaust pulp 43 is opened to open the vacuum blood collection chamber 13 to the atmosphere.

After the completion of blood collection, the CPU 65 extends and drives the swing motor 23 for a certain period of time to swing the bag tray 19. After that, the buzzer 69 notifies the end of blood collection.

F 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 discharged from the vacuum blood collection chamber 13.

Procedure of Second Blood Collection Mode a The blood bag 1 is placed in the vacuum blood collection chamber 13 and placed on the bag pan 19, and the blood collection tube 2 is punctured into the tube holder 44.

B The donor is punctured with the blood collection needle provided at the end of the blood collection tube 2.

C The start switch 54 is turned on. CPU
The 65 receives the output of the weight sensor amplification unit 38, measures the empty weight of the blood bag 1, and writes it in the memory 66 (or the memory inside the CPU 65).

D The start switch 54 is turned on again. As a result, the CPU 65 causes the vacuum pump 17 and the swing motor 2 to
3 is driven and controlled to collect blood by decompressing the vacuum blood collection chamber 13,
The bag tray 19 is swung. The CPU 65 obtains the output of the weight sensor amplification unit 38 to detect the measured blood collection amount of the blood bag 1 at the timing when the bag tray 19 is temporarily stopped at the lowest point, and the set blood collection written in the memory 66. Volume, specific gravity of blood, and weight of blood bag 1 measured this time.
Is calculated.

[0047]

[Equation 2]

E Same as d above.

F Same as e above.

G Same as f above.

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

However, the blood collecting apparatus 10 has a function of adjusting the negative pressure level of the vacuum blood collecting chamber 13 as described below.

That is, the CPU 65 of the control device 18
a As described above, the pressure in the vacuum blood collection chamber 13 is controlled so that the pressure detected by the pressure sensor 73 matches the set pressure in the memory 66, and the pressure detected by the pressure sensor 73 is stored in the memory 6.
In the state where the set pressure of 6 has been reached, the increase rate of the blood collection amount measured by the scale 33 does not reach a predetermined normal increase rate (the blood collection amount hardly changes), and the vacuum blood collection chamber 13 The negative pressure is reduced and controlled, for example, by the following control method. The rate of increase in the amount of blood collected is the ratio of the amount of blood collected with respect to the passage of measurement time. In this embodiment, the amount of blood collected this time measured at the lowermost end of each swing cycle of the bag tray 19 as described above. It is calculated by the ratio of increase to the blood collection volume of the previous measurement.

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

At this time, the CPU 65 controls the vacuum pipe 41 described above.
The negative pressure in the vacuum blood collection chamber 13 is controlled to be reduced from the standard set pressure P1 to the secondary set pressure P2 by opening the exhaust pulp 43 provided in the. According to this, the vacuum blood collection chamber 13
The negative pressure of can be quickly reduced and controlled.

Further, the CPU 65 controls the negative pressure of the vacuum blood collection chamber 13 to the standard pressure P1 or the secondary set pressure P2 by controlling ON / OFF of the vacuum pump 17. According to this, the negative pressure of 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 be secured over time.

In the implementation of the present invention, a CPU
Reference numeral 65 denotes a stepwise reduction control of the negative pressure of the vacuum blood collection chamber 13 from the set pressure under the condition of b, and the reduction control operation until the increase rate of the blood collection amount measured by the scale 33 reaches the normal increase rate. The negative pressure of the vacuum blood collection chamber 13 may be reduced and controlled by executing the above.

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

According to the above embodiment, the target level of the negative pressure generated in the vacuum blood collection chamber 13 is stored in the set pressure and the memory 66, and the actual pressure of the vacuum blood collection chamber 13 is detected by the pressure sensor 73, and the CPU 65 Thus, 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 collected in the blood bag 1 is measured, and the CPU 65 is conditioned that the rate of increase in the measured amount of blood collected does not reach a predetermined normal increase rate while the detected pressure has reached the set pressure. , "The needle hole of the blood collecting needle adsorbs the blood vessel wall to be in a closed state", and the negative pressure of the vacuum blood collecting chamber 13 is controlled to be lower than the set pressure. As a result, the blood collection suction is automatically adjusted to a blood collection possible level (for example, a level at which natural blood collection is possible). Therefore, regardless of the thickness of the blood donor's blood vessel, blood can always be stably collected, and even a blood donor with a thin blood vessel can smoothly collect blood although it takes some time.

Here, according to the above-described negative pressure level reduction control system, the blood drawing suction force can be immediately and naturally adjusted to a blood collection possible level.

Further, according to the above-mentioned negative pressure level reduction control system, the reduction width of the blood drawing suction force can be minimized.

By the way, in the practice of the present invention, the amount of blood collected in the blood bag 1 is measured, and only if the rate of increase in the measured amount of blood collected does not reach the predetermined normal rate of increase, the "needle of the blood collecting needle" It may be determined that “the hole is in a closed state by adsorbing the blood vessel wall” and the negative pressure of the vacuum blood collection chamber 13 is controlled to be lower than the set pressure.

The present invention can be widely applied to any blood collecting apparatus in which the measuring method of the blood collecting amount measuring means and the pressure adjusting method of the vacuum blood collecting chamber are used.

[0064]

As described above, in the blood collecting apparatus according to the present invention, in the blood collecting apparatus for collecting a predetermined amount of blood in the blood container, at least two measurement values can be switched and displayed, and the switching can be performed. By providing the switch means for performing, the display space of items that are not frequently confirmed is reduced, the space of the operation panel is reduced, and the overall size of the device is reduced.
The weight can be reduced.

In the blood collecting device as a preferred embodiment of the present invention, the blood collecting device further includes negative pressure generating means for generating negative pressure in the blood collecting chamber for collecting blood in the blood container, And a vacuum degree measuring means of the blood collecting chamber, wherein the at least two measured quantities include a vacuum degree and a blood sampling amount, so that at least a vacuum degree with a relatively low confirmation frequency is regarded as a blood sampling amount. By enabling switching display on the same display unit, the space of the operation panel can be reduced, and the overall size and weight of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a front view showing a blood collecting device according to an embodiment of the present invention.

FIG. 2 is a side view showing a main part of FIG. 1 in a cutaway manner.

FIG. 3 is a plan view of FIG.

FIG. 4 is a plan view showing a main part of FIG. 1 in a cutaway manner.

FIG. 5 is a vacuum circuit diagram.

FIG. 6 is a control block diagram.

FIG. 7 is a diagram showing an on / off control state of a vacuum pump and a pressure state of a vacuum blood collection chamber.

[Explanation of symbols]

 1 Blood Bag (Blood Container) 10 Blood Collection Device 13 Vacuum Blood Collection Chamber 17 Vacuum Pump 33 Scale (Blood Collection Volume Measuring Means) 41 Vacuum Piping 43 Exhaust Pulp 65 CPU (Control Means) 66 Memory (Memory Means) 73 Pressure Sensor

Claims (2)

[Claims] 1. A blood collecting apparatus for collecting a predetermined amount of blood in a blood container, comprising: a display unit capable of switching and displaying at least two measured values; and a switch means for performing the switching. 2. The blood collecting device further comprises negative pressure generating means for generating a negative pressure in a blood collecting chamber for collecting blood in the blood container, and means for measuring the amount of blood collected in the blood container and the blood collecting. 2. A blood collecting apparatus according to claim 1, further comprising a vacuum degree measuring means for the chamber, wherein the at least two measured amounts include a vacuum degree and a blood sampling amount.