JPH0628112Y2 - Blood sampling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a blood collecting device.

[Prior Art] Conventionally, a blood collecting device as described in Japanese Patent Publication No. 51-3153 has been proposed.

BACKGROUND ART A conventional blood collection device includes a housing, a tray provided in the housing for supporting a blood bag, and a limit switch for detecting when a thickness of a blood bag provided in the housing, which expands with blood collection, reaches a predetermined level. And a display unit provided on the front surface of the housing and capable of displaying that a constant blood collection amount has been obtained based on the detection result of the limit switch. At this time, the blood bag is taken in and out of the tray through the opening on the upper surface of the housing.

Further, in the conventional blood collecting apparatus, a vacuum blood collecting chamber is formed around the tray in the housing, and a predetermined negative pressure is applied to the blood bag supported by the tray to collect blood. Therefore, an opening / closing lid is provided at the upper opening of the housing. ing. Then, an anticoagulant such as heparin loaded in the blood bag is agitated with the blood to prevent the blood from coagulating. In order to prevent the blood from coagulating, the rocking means that rocks the saucer of the blood bag. Is provided in the housing.

[Problems to be Solved by the Invention] However, the above-described conventional blood collecting device has the following problems.

When the blood collection device is installed on a table surface or the like, the upper opening of the housing is located in a substantially horizontal plane. For this reason, it is difficult for the operator who faces the front of the housing to take in and out the blood bag, and it is difficult to confirm the change in the state of the blood bag during blood collection.

In order to prevent the blood bag on the pan that swings during blood collection from hitting the opening / closing lid, the blood bag on the pan that is in the maximum inclination state at the highest point of the swinging process is opened and closed at an upper level with a certain allowance. Need to set the lid. At this time, since the opening / closing lid is located on a substantially horizontal plane along the upper opening of the housing, a triangular or trapezoidal dead space is created between the horizontal opening / closing lid and the tray in the maximum inclined state. This hinders the downsizing of the blood collection device.

An object of the present invention is to make it possible to easily take a blood container in and out of a container support portion in a housing and to easily check a change in the state of the blood container during blood collection.

It is another object of the present invention to realize a compact blood collection device without causing the blood container on the container support that swings during blood collection to hit the opening / closing lid.

[Means for Solving the Problem] The present invention according to claim 1, wherein a housing, a container support portion provided in the housing to support a blood container, and a blood collection amount or a blood collection in a blood container provided in the housing. In a blood sampling device having a blood sampling amount or blood sampling residual amount measuring means for measuring the residual amount, and a display section provided on the front surface of the housing and capable of displaying the measurement result of the blood sampling amount or blood sampling residual amount measuring means, a blood container The upper opening of the housing for loading and unloading the container supporting section is set to have a downward slope from the back side of the housing toward the front side.

The present invention according to claim 2, wherein an opening / closing lid for partitioning and forming a vacuum blood collection chamber around the container support portion in the housing is provided in the upper opening of the housing, and a blood container is provided in the housing. An oscillating means for oscillating the container support portion during blood collection is provided.

[Operation] According to the present invention described in claim 1, there is the following operation (1).

(1) When the blood collecting device is installed on the table surface, the upper opening of the housing has a downward slope toward the front side of the housing. For this reason, an operator facing the front of the housing can easily take the blood container in and out of the container support portion in the housing, and can easily confirm the state change of the blood container during blood collection.

According to the present invention described in claim 2, there is the following effect (2).

(2) A downward slope is formed toward the front side of the housing so that the opening / closing lid follows the opening on the upper surface of the housing. For this reason,
The blood vessel on the container support that rocks during rocking can be prevented from hitting the open / close lid by making the container support that is in the maximum inclination state at the highest point of the rocking process and the open / close lid substantially parallel. . Moreover, the dead space between the parallel surfaces of the opening / closing lid and the container support can be minimized. Therefore, the blood container on the container support that swings during blood collection does not hit the opening / closing lid, and the blood collection device can be made compact.

[Embodiment] 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 portion of FIG.
1 is a plan view of FIG. 1, FIG. 4 is a side view showing a scale, FIG. 5 is a vacuum circuit diagram, FIG. 6 is a rocking state diagram, and FIG. 7 is a control block diagram.

As shown in FIGS. 1 to 3, the blood collecting device 10 includes a display panel 12 on the front surface of the housing 11, and the housing 11
A vacuum blood collection chamber 13 is formed inside the chamber. Reference numeral 14 is an opening / closing lid of the blood collection chamber 13, 15 is a hinge of the lid 14, 16 is the blood collection chamber 1.
3 is a sealing rubber for hermetically sealing 3. 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 intake port 17A of the vacuum pump 17 to enable decompression, and includes a bag tray 19 for supporting the blood bag (blood container) 1 made of polyvinyl chloride or the like. There is. The blood collection device 10
While the vacuum blood collection chamber 13 is depressurized, a predetermined negative pressure is applied to the blood bag 1 supported by the bag tray 19 to collect blood. At this time, the blood collecting device 10 shakes the bag tray 19 to stir the anticoagulant such as heparin and the like preloaded in the blood bag 1 and the blood, and measures the weight of the blood bag 1 to collect the blood. Measure the quantity.

The structure of rocking the bag tray 19 in the blood collecting device 10 and the structure of measuring the weight of the blood bag 1 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 the frame 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. A crank wheel 28 is fixed to one end of the drive shaft 24.
One end of the link 29 is connected on the radius of rotation of, and the other end of the link 29 is connected to the swing frame 22.

On the other hand, a scale mounting member 31 is fixed to the upper surface of the swing frame 22, and a scale (weight measuring means) 33 is cantilevered on the scale mounting member 31. The scale 33 is composed of a substantially rectangular (parallelogram) frame as shown in FIG. The scale 33 is provided with strain gauges 34 as weight sensors that are attached to the two positions on the upper surface and the two positions on the lower surface, respectively, and form a Wheatstone bridge circuit.
5, the bag tray 19 is fixed via the receiving plate 36. The scale 33 has a weight sensor amplification unit 38.

That is, the blood collecting apparatus 10 rotates the driving shaft 24 and the crank wheel 28 by the operation of the rocking motor 23, thereby rocking the rocking frame 22, and the scale 33 on the rocking frame 22.
The bag tray 19 supported via the table is rocked. At this time, as shown in FIGS. 2 and 6, the bag tray 19 has a maximum rising point of + α degrees with respect to the horizontal and −β.
Two points above and below the lowest descent point can be rocked as turning points in the rocking process. Further, one cycle time of the rocking that the rocking motor 23 imparts to the bag tray 19 is the power supply frequency.
Approximately 1.0 to 2.6 seconds in the 60Hz region, approximately 50Hz in the power supply frequency region
It is 1.2 to 3 seconds. If the one cycle time is too long, the mixing of the anticoagulant in the blood bag 1 with the blood becomes weak. It exhibits a phenomenon that the tracking is poor and it becomes difficult to mix. The blood collection device 10 also supports the bag tray 19 on a scale 33 that is cantilevered on the swing frame 22 via a scale attachment member 31, and the output change of the strain gauge 34 based on the flexural deformation of the scale 33. The weight of the blood bag 1 is measured by the above, and 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 driving shaft 24 by the optical sensor 40,
The control device 18 recognizes the current swing angle position of the bag tray 19 by the swing motor 23, and the bag tray 19 is at the turning point of either the highest point or the lowest point. The weight of the blood bag 1 is measured by taking in the measurement result of the scale 33 described above.

At this time, in the control device 18 of the blood collection device 10, the bag tray 19 is at the turning point at the initial or intermediate stage of blood collection into the blood bag 1, and when the measurement result of the scale 33 is taken in, the swing motor is used. The swing motion of the bag tray 19 by 23 is not completely stopped, or is temporarily stopped for about 0.2 seconds. Also, the remaining amount of blood collected in the blood bag 1 is, for example, 50 m.
When the bag tray 19 is at the turning point and the measurement result of the scale 33 is taken in at the end stage of blood collection, which will be described below, the swing operation of the bag tray 19 by the swing motor 23 is temporarily stopped for about 0.5 seconds. The weight of the blood bag 1 at the end stage can be accurately measured.

Further, in the blood collecting device 10, the blood bag 1 is reliably rocked so as to prevent blood coagulation, and the rocking space of the bag tray 19 is made as small as possible to make the blood collecting device 10 compact. In order to realize this, the appropriate swing angle range “[+ α
[Degrees] to [-[beta] degrees] "is defined as follows: That is, [+ [alpha] degrees] that determines the above-mentioned maximum rise point of the bag tray 19 is
[+10 degrees to +40 degrees], more preferably [+10 degrees to +30 degrees]
[Degrees], most preferably within an angle range of [+15 degrees to +25 degrees], and in this example, [+20 degrees]. In addition, the [-β degree] that determines the above-mentioned lowest descent point of the bag tray 19 is [-10 degrees to -40 degrees], more preferably [-
10 degrees to -30 degrees], and most preferably within the angle range of [-15 degrees to -25 degrees].
Degree].

In addition, the swing angle range of the bag tray 19 described above is “[+ α
Experimentally, "[+8 degrees]-[-[degrees]"
8 degrees] ”,“ [+12 degrees] ~ [-12 degrees] ”,“ [+15 degrees]
~ [-15 degrees] "," [+18 degrees] ~ [-18 degrees] "," [+
21 degrees]-[-21 degrees] "," [+24 degrees]-[-24 degrees] ",
"[+30 degrees] ~ [-10 degrees]", "[+25 degrees] ~ [-15"
Degree] "," [+25 degree] ~ [-5 degree] "," [+20 degree] ~
Blood bag 1
As a result of comparing the degree of mixing of anticoagulant and blood with
It was recognized that "[+20 degrees] to [-20 degrees]" was optimal.

As shown in FIG. 5, the blood collection device 10 connects the intake port 17A of the vacuum pump 17 and the vacuum blood collection chamber 13 with a vacuum pipe 41, and is closed in the middle of the vacuum pipe 41 by turning on an exhaust solenoid 42. An exhaust valve 43 that opens by gravity when the exhaust solenoid 42 is turned off is provided. Blood collection device 10
Creates a constant negative pressure (vacuum level) in the vacuum blood collection chamber 13 by controlling the on / off of the vacuum pump 17, and opens the exhaust valve 43 at the end of blood collection to open the vacuum blood collection chamber 13 to the atmosphere.

The blood collection device 10 includes a tube holder 4 at a portion adjacent to the vacuum blood collection chamber 13 at an upper portion on the front side of the housing 11.
4, the blood collection tube 2 connected to the blood bag 1 housed in the vacuum blood collection chamber 13 can be drawn out. 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 collection device 10 includes a blood collection amount / vacuum degree switching display lamp 49, blood collection amount / vacuum degree switching switches 50, 40.
0m / 200m switching indicator lamp 51, 400m / 200m
Changeover switch 52, stop switch 53, start switch 5
4, a use bag display lamp 55, a use 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 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 collection 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 is a CPU (central processing unit) [device 10
Including a memory in which a control program for a series of operations is written] 65, a memory (storage means) 66, an input / output control unit 67, an LED (light emitting diode) drive circuit 6
8, 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 composed of a non-volatile memory such as an EA-ROM or an EEP-ROM. The stored data can be rewritten and read, and the stored data can be held without applying a power supply voltage. The stored data of the memory 66 includes the negative pressure generated in the vacuum blood collection chamber 13, the set blood collection amount in the blood bag 1, the swing extension time of the bag tray 19 after the blood collection is completed, and the like.

The buzzer 69 sounds differently depending on the completion of blood collection, the error of the negative pressure formed in the vacuum blood collection chamber 13, the rotation error of the rocking motor 23, the blood leak detection of the blood leak sensor 71, and the like.

The fail-safe circuit 70 monitors the occurrence of runaway of the CPU 65 and stops the device on the safe side when the runaway occurs.

The drive circuit 62 is connected to the main control circuit 61, and
A / D conversion circuit 72 is provided. A weight sensor amplification unit 38 in which the strain gauge 34 is connected to the A / D conversion circuit 72.
And a pressure sensor 73, which is provided in the above-mentioned vacuum pipe 41 and detects the negative pressure of the vacuum blood collection chamber 13, is connected via a pressure sensor amplifier circuit 74.

At this time, the CPU 65 of the control device 18 calculates the blood sampling weight by assuming that the output y of the strain gauge 34 constitutes a linear function of y = aw + b with respect to the measured blood sampling weight w. Also, C
The PU 65 calculates the pressure by assuming that the output z of the pressure sensor 73 constitutes a linear function of z = cp + d with respect to the measured pressure p.

The drive circuit 62 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 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 are provided.

The CPU 65 of the 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 are obtained, and the power supply switch 77 of the vacuum pump 17 is turned on as described above so that the detected pressure matches the set pressure. Turn on / off. This allows
The negative pressure of the vacuum blood collection chamber 13 slightly changes within a certain range of the set pressure, and as a result, a constant pressure state is obtained.

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

The power switch 58 is turned on.

The blood collection amount is selected by the 400m / 200m selector switch 52. The selection result is displayed on the switching display lamp 51.

A bag to be used is selected by using the bag changeover switch 56. The selection result is displayed on the display lamp 55. The types of bags used are single (S), which is the parent bag only, and double (D), which is also equipped with one or more small bags.
There are Triple (T) and Quadruple (Q).

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

Put the blood bag 1 into the vacuum blood collection chamber 13 and fill the bag pan 1
9 and the blood collection tube 2 is set in the tube holder 44.

The start switch 54 is turned on. The control device 18 drives and controls the vacuum pump 17 and the swing motor 23, and the vacuum blood collection chamber 1
Blood collection by decompression of 3 and shaking of the bag tray 19 are performed. Further, the control device 18 obtains the output of the weight sensor amplifying unit 38 at the timing as described above when the bag tray 19 is at the turning point of either the highest point or the lowest point in the swinging process, and the blood bag is obtained. The detected blood collection amount of 1 is detected, and the set blood collection amount written in the memory 66,
Using the specific gravity of blood and the preregistered weight of blood bag 1,
The remaining blood sampling amount (volume) is calculated by the following equation (1).

Residual blood collection amount (m) = [set blood collection amount (g) + pre-registered weight (g) -measured blood collection amount (g)] / specific gravity (g / m) (1) The control device 18 is the above calculation result. On condition that the residual blood collection amount 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 exhaust valve 43 to open the vacuum blood collection chamber 13 to the atmosphere.

After the blood collection is completed, 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.

In the blood collection device 10, the upper opening 11A of the housing 11 for loading and unloading the blood bag 1 into and from the bag tray 19 is set so as to have a downward slope from the rear side of the housing 11 toward the front side. ing.

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

(1) When the blood collecting device 10 is installed on the table surface, the upper opening 11A of the housing 11 has a downward slope toward the front side of the housing 11. Therefore, the housing 11
For the operator facing the front of the blood bag 1, the blood bag 1 can be easily put in and taken out of the bag tray 19 in the housing 1, and the state change of the blood bag 1 during blood collection can be easily confirmed.

(2) The opening / closing lid 14 forms a downward slope toward the front side of the housing 11 so as to follow the upper opening 11A of the housing 11. Therefore, the blood bag 1 on the bag tray 19 that swings during the swing is performed with the bag tray 19 that is in the maximum inclined state at the highest point of the swing process and the opening / closing lid 14 being substantially parallel.
Can be prevented from hitting the opening / closing lid 14. Moreover, the dead space between the parallel surfaces of the opening / closing lid 14 and the bag tray 19 can be minimized. Therefore, the blood bag 1 on the bag tray 19 that swings during blood collection does not hit the opening / closing lid 14,
In addition, the blood collection device 10 can be made compact.

When the swing angle range of the bag tray 19 is set to "[+20 degrees] to [-20 degrees]" as in this embodiment,
When considering the above (2), it is preferable to set the angle formed by the descending slope surface including the upper surface opening 11A of the housing 11 with respect to the vertical line to about 78 degrees.

Further, in the blood collecting device of the present invention, the blood collecting method is not necessarily based on the vacuum decompression method, but may be based on another suction method such as a roller pump. At this time, the opening on the upper surface of the housing does not necessarily require the opening / closing lid.

Further, in the blood collecting device of the present invention, the measuring method of the blood collecting amount measuring means does not necessarily obtain the blood collecting amount by measuring the weight change of the blood container, but the blood collecting amount is measured by measuring the volume change of the blood container. May be required.

[Advantages of the Invention] As described above, according to the present invention, the blood container can be easily taken in and out of the container support portion in the housing, and the state change of the blood container during blood collection can be easily confirmed.

Further, according to the present invention, it is possible to realize a compact blood collection device without causing the blood container on the container support that swings during blood collection to hit the opening / closing lid.

[Brief description of drawings]

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 portion of FIG.
1 is a plan view of FIG. 1, FIG. 4 is a side view showing a scale, FIG. 5 is a vacuum circuit diagram, FIG. 6 is a rocking state diagram, and FIG. 7 is a control block diagram. 1 ... Blood bag (blood container), 10 ... Blood collection device, 11 ... Housing, 11A ... Top opening, 12 ... Display panel (display), 14 ... Open / close lid, 19 ... Bag tray ( Container support part), 22 ... Oscillating frame (oscillating table), 23 ... Oscillating motor, 33 ... Scale (blood sampling amount or blood sampling residual amount measuring means).

Claims (2)

[Scope of utility model registration request] 1. A housing, a container support portion provided in the housing for supporting a blood container, and a blood sampling amount or blood sampling residual amount measuring means provided in the housing for measuring a blood sampling amount or a blood sampling residual amount in the blood container. A blood sampling device provided on the front surface of the housing and capable of displaying a blood sampling amount or a measurement result of the blood sampling residual amount measuring means, wherein a top opening of the housing for loading and unloading a blood container into and from the container support part Is set so as to have a downward slope from the back side to the front side of the housing. 2. An opening / closing lid for partitioning and forming a vacuum blood collection chamber around a container support portion in the housing is provided in an upper opening of the housing, and a container is provided in the housing during blood collection to a blood container. The blood collecting device according to claim 1, further comprising a swinging means for swinging the support portion.