JPH065797Y2 - Vacuum blood sampling device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum blood collection 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]

However, in the above-mentioned conventional vacuum blood collecting apparatus, a large negative pressure is applied to the vacuum blood collecting chamber in order to obtain a suction force for collecting blood. Therefore, even if the blood container housed in the vacuum blood collection chamber should be slightly damaged, it will be difficult to see it from the outside and the occurrence of blood leakage from the damaged part will be delayed. In addition, a small amount of blood leakage may be blocked by the blood container, which may delay discovery, resulting in a large damage to the container and a large amount of blood leakage.

Therefore, in view of the above problems, it is an object of the present invention to provide a vacuum blood sampling apparatus which can promptly detect and detect blood leakage from a blood container.

[0006]

[Means for Solving the Problems] What achieves the above-mentioned object is provided with a vacuum blood collection chamber which is decompressed by a vacuum pump and in which a blood container formed of a soft material is set, and which is formed in the vacuum blood collection chamber. In a vacuum blood collecting apparatus for collecting blood in a blood container by negative pressure, a vacuum blood collecting apparatus having a blood leak sensor for detecting blood leak from the blood container is achieved.

[0007]

According to the vacuum blood sampling apparatus of the present invention, since it has a blood leakage sensor for detecting blood leakage from the blood container, it is possible to detect blood leakage from the blood container without opening the vacuum blood sampling chamber. When blood leak is detected by the blood leak sensor, a buzzer for notifying the blood leak sounds. As a result, the fact of blood leakage can be found promptly. It should be noted that the buzzer for notifying the blood leak sounds differently from other buzzers, for example, the buzzer for the error of the negative pressure or the swing motor, and therefore the fact of the blood leak and the other error is not confusing.

[0008]

【Example】

FIG. 1 is a front view showing a blood collecting device according to an embodiment of the present invention,
2 is a side view showing the main part of FIG. 1 in a broken manner, FIG. 3 is a plan view of FIG. 1, FIG. 4 is a plan view showing the main part of FIG.
Is a vacuum circuit diagram, FIG. 6 is a control block diagram, and FIG. 7 is a diagram showing an open / close control state of the open / close valve and a pressure state of the vacuum blood collection chamber.

The blood collecting device 10 is, as shown in FIGS.
A display panel 12 is provided on the front surface of the housing 11, and a vacuum blood collection chamber 13 is formed inside the housing 11. 14
Is a lid of the blood collection chamber 13, 15 is a hinge of the lid 14, and 16 is a sealing rubber for sealing the blood collection chamber 13. 14A is a handle of the lid 14. In addition, the blood sampling device 10 has a housing 1
A vacuum pump 17 and a controller 18 are built in the lower part of 1.

The vacuum blood collection chamber 13 of the blood collection device 10 is connected to the intake port 17A of the vacuum pump 17 so that the pressure can be reduced, and the bag tray for supporting the blood bag (blood container) 1 made of soft polyvinyl chloride or the like. Equipped with 19. 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 collection device 10 rocks the bag tray 19 to stir the blood and the anticoagulant such as heparin preloaded in the blood bag 1 and the blood.
The blood collection amount is measured by measuring the weight of the blood bag 1.

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 (blood sampling amount measuring means) 33 is cantilevered on a support plate 32 which is bridged between the ends of the mounting blocks 31. Supported. The scale 33 is provided with strain gauges 34 as weight sensors that are attached to the upper surface 2 position and the lower surface 2 position respectively to form a Wheatstone bridge circuit, and a weighing platform 35 and a receiving plate 36 are provided at the tip of the scale 33. The bag tray 19 described above is fixed.
Reference numeral 37 is a stopper for preventing the balance 33 from swinging to the left and right, and 38 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. Further, the blood collecting device 10 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 flexible deformation of the scale 33. Is weighed, and then the blood collection amount is measured.

In the blood collecting device 10, the rotation position of the detection cam 39 provided at the other end of the driving shaft 24 is detected by the optical sensor 4.
0, and thereby, the swing motor 23 is drive-controlled, and the bag tray 19 is temporarily stopped at the lowest descent point (bottom dead center) and held under a constant posture condition. As described above, the weight of the blood bag 1 is measured.

In the blood collecting apparatus 10, as shown in FIG. 5, a vacuum path extending from the suction port 17A of the vacuum pump 17 to the vacuum blood collecting chamber 13, in this embodiment, a vacuum pipe 41 is provided with two large and small air inlets 41A and 41B. ing. Each air inlet 41
In A and 41B, the air inlets 41A and 41B are closed by turning on the opening / closing solenoids 42A and 42B, and by gravity when the opening / closing solenoids 42A and 42B are turned off.
On-off valves 43A and 43B for opening A and 41B are provided.
The open / close valves 43A and 43B may be provided with an elastic body that applies a valve opening force between the open / close valves 43A and 43B and the inner wall surface of the vacuum pipe 41. The blood collection device 10 is configured such that the vacuum blood collection chamber 13 is controlled by opening / closing the opening / closing valve 43B provided in the small air inlet 41B.
A constant negative pressure (vacuum degree) is formed in the vacuum blood collection chamber 13 by opening the on-off valves 43A and 43B of the air inlets 41A and 41B at the end of blood collection (see FIG. 7).

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 portion of the front side of the housing 11 so that the blood collection tube 2 connected to the blood bag 1 housed in the vacuum blood collection chamber 13 can be drawn out. 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 apparatus 10 includes a blood sampling amount / vacuum degree switching lamp 49, a blood sampling volume / vacuum degree switching switch 50, 400 ml / 200 ml switching display lamps 51, 4
00 ml / 200 ml changeover switch 52, stop switch 53, start switch 54, used bag display lamp 55,
Bag switching switch 56, blood collection / vacuum display 5
7 is provided. The blood collection device 10 includes a power switch 58 and a fuse holder 59 at the lower front portion of the housing 11, and a power connector 60 at the lower rear portion of the housing 11.

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 unit 67. , 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 blood leak sensor 71 is provided on the inner bottom surface of the bag tray 19 as is apparent from FIG.

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 2
3. Depending on the detection of blood leakage by the blood leakage sensor 71, etc., they ring 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 open / close solenoids 42A, 42B, a pump drive circuit 78 for turning on / off the power supply switch 77 of the vacuum pump 17, and a motor drive circuit 80 for turning on / off the power supply switch 79 of the swing motor 23. Prepare

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. The on / off solenoid 42B of the on-off valve 43B is on / off controlled as shown in FIG. 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. 7C, and as a result, a constant pressure state is obtained.

The set pressure in the vacuum blood collection chamber 13 can be changed by rewriting the data stored in the memory 66.

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 blood collection operation procedure by the blood collection device 10 will be described.

The power switch 58 is turned on.

400 ml / 200 ml selector switch 5
Select the amount of blood collected according to 2. The selection result is displayed on the switching display lamp 51.

A bag to be used is selected by using the bag change switch 56. The selection result is displayed on the display lamp 55. The types of bags to be used include a single (S) having only a parent bag, a double (D) having at least one small bag, a triple (T), and a quadruple (Q).

The blood collecting needle provided at the end of the blood collecting tube 2 is punctured in the blood donor to collect blood to some extent.

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.

The start switch 54 is turned on. The controller 18 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 control device 18 controls the bag saucer 19
Is temporarily stopped at the lowest point, the output of the weight sensor amplification unit 38 is obtained to detect the measured blood sampling amount of the blood bag 1, and the set blood sampling amount, the blood specific gravity and the blood written in the memory 66 are detected. Using the preregistered weight of the bag 1, the residual blood sampling amount (volume) is calculated by the following equation (1).

Remaining blood collection amount (ml) = [set blood collection amount (g) + pre-registered weight (g) -measured blood collection amount (g)] / specific gravity (g / ml) (1) The controller 18 calculates the above. On condition that the residual blood collection amount as a result has reached zero, the blood collection tube 2 is closed by the tube clamp 46 and the blood collection operation for the blood bag 1 is stopped. At this time, the controller 18 stops the vacuum pump 17 and opens the opening / closing valves 43A and 43B as described above to open the vacuum blood collection chamber 13 to the atmosphere.

After the completion of blood collection, the control device 18 extends and drives the swing motor 23 for a certain period of time to swing the bag tray 19. After that, the buzzer 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.

Next, the operation of the above embodiment will be described with reference to FIG.

According to the above-described embodiment, the signal detected by the blood leak sensor 71 is input to the input / output control unit 67, and a predetermined signal is output to the buzzer 69 to warn that blood is leaking. The buzzer 69 makes a predetermined sound.

[0042]

EFFECTS OF THE INVENTION According to the vacuum blood sampling apparatus of the present invention, it is possible to promptly detect and detect blood leakage from a blood container housed in the vacuum blood sampling chamber during blood sampling without opening the vacuum blood sampling chamber.

[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. 1.

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 open / close control state of the open / close valve and a pressure state of the vacuum blood collection chamber.

[Explanation of symbols]

 1 ... Blood Bag (Blood Container) 10 ... Blood Collection Device 13 ... Vacuum Blood Collection Room 17 ... Vacuum Pump 71 ... Leakage Sensor

Claims (1)

[Scope of utility model registration request] 1. A vacuum for depressurizing by a vacuum pump and having a vacuum blood collection chamber in which a blood container formed of a soft material is set, and for collecting blood in the blood container by negative pressure generated in the vacuum blood collection chamber. A blood collecting device, comprising: a blood leakage sensor for detecting blood leakage from the blood container.