JP3241966B2 - Blood collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood collecting apparatus for use in collecting blood while stirring the blood collected in a flexible blood bag during blood collection.

[0002]

2. Description of the Related Art Conventionally, various blood collecting apparatuses have been proposed as described in Japanese Patent Publication No. 63-84208. Referring to the operation principle diagram of FIG. 6, the proposed blood collection device will be described. A flexible blood bag 1 for collecting blood via a tube 2 is shown.
Is placed on the tray 103. Tray 103 is CL
Is rotated by a horizontal axis, and is reciprocated about 25 to 40 degrees about the horizontal axis in the direction of arrow D in FIG. With such a configuration, the blood bag 1 placed on the tray 103 is swung up and down, so that the anticoagulant previously filled in the blood bag 1 is mixed with the collected blood. It is configured.

[0003]

By the way, for example, when blood collection is completed using the blood collection apparatus described above,
A few milliliters of blood is withdrawn from the collected blood bag 1 for a component test, and a test is performed. However, when the blood collection device as described above is used, most of the blood moves up and down in the direction of the dashed arrow B as shown in FIG. Unevenness is likely to occur in the mixing, and the anticoagulant in the blood bag 1 and the blood are not completely mixed. For example, when the blood coagulation is taken out of the blood bag, the blood coagulation easily occurs and the blood test becomes impossible. In some cases.

[0004] Therefore, the blood collection apparatus of the present invention has been made in view of the above-described problems. For example, by uniformly mixing blood in a blood bag and an anticoagulant at the time of blood collection, It is an object of the present invention to provide a blood collection device in which blood drawn for examination does not coagulate.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems and achieve the object, a blood collecting apparatus of the present invention has the following arrangement. That is, a blood collecting apparatus for collecting blood while stirring while collecting blood in the blood bag, wherein the tray stores the blood bag in a state of being inclined by a predetermined angle with respect to a horizontal plane and in an immovable state. A member, support means for movably supporting the tray member in a state inclined by the angle and along a substantially horizontal plane, and rotationally driving the tray member along an arc decentered by a predetermined amount. And a driving means for stirring the blood in the blood bag.

Preferably, the blood bag is housed in the tray member with the blood introduction tube side raised, and the angle is set to about 10 degrees with respect to a horizontal plane. And

[0007] Preferably, the driving means is further connected to a control means for driving the rotation to extend further after the end of blood collection.

Preferably, the supporting means includes a base, a first stage member movably supported on the base by a first slider member capable of moving back and forth (Y), and A second stage member movably supported on a first stage member by a second slider member capable of moving in the left-right (X) direction.

Preferably, the supporting means includes a base member, and a stage member which is movable in the front-rear (Y) and left-right (X) directions at the upper part of the base,
The thrust bearing is interposed between the front, rear, left and right stage members and the base.

[0010] Preferably, the apparatus further comprises a vacuum blood collection chamber in which the pressure is reduced by a vacuum pump and in which a blood bag is set, and blood is collected into the blood bag by negative pressure generated in the vacuum blood collection chamber. And

[0011] Preferably, the blood collection amount measuring means for measuring the amount of blood collected into the blood bag, and a comparison between an increase in the measured value of the blood collection amount measurement means and a predetermined increase amount. Automatic control means for automatically controlling the negative pressure of the vacuum blood collection chamber.

Preferably, the automatic control means includes:
The method is characterized in that the negative pressure level of the vacuum blood collection chamber is controlled to be reduced until the rate of increase of the measured value reaches a predetermined rate.

[0013] Preferably, the automatic control means includes:
When the rate of increase of the measured value reaches a predetermined rate of increase, control is performed so as to maintain the negative pressure level in the vacuum blood collection chamber.

[0014] Preferably, the automatic control means includes:
The apparatus is characterized in that the negative pressure level in the vacuum blood collection chamber is controlled so that the rate of increase of the measured value maintains a predetermined rate of increase.

[0015] Preferably, the predetermined increase rate is a saturation increase rate.

[0016] Preferably, the predetermined increase rate is an increase rate pattern.

Preferably, the automatic control means includes:
It is characterized in that pressure reduction control is performed stepwise.

[0018] Preferably, further, blood was collected while oscillating the blood bag by the drive means swings by extending the tray member even after blood collection terminates accommodating the blood bag by the driving means And a swing extension time setting means.

Preferably, the data of the swing extension time set by the swing extension time setting means is stored in a storage means which is rewritable and readable and can hold storage data without supply of a power supply voltage. It is characterized by the following.

[0020]

With the above arrangement, the blood in the blood bag is swirled and mixed while the blood is collected while rotating horizontally while the blood bag is placed on the tray member. It works so that it can do. In particular, when mixing blood with an anticoagulant in a blood bag,
Blood is collected while horizontally rotating the tray member on which the blood bag is placed, and works so as to uniformly mix the blood with the anticoagulant in the blood bag. Also, for example, the tray member
By inclining (about 10 °) from the horizontal plane and setting the tube inlet side of the blood bag high, the anticoagulant having different specific gravities and the blood work more uniformly.
Furthermore, by extending and rotating after the end of blood collection,
Blood that has just entered the blood bag just before the end also works to mix equally with other blood.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 2 is a plan view showing a state where the tray 3 of FIG. 1 is removed, and FIG. 3 is a left side view of FIG.

First, in FIG. 1, a holding member 5a, which is bent in a U-shape, is fixed to the right side of a base plate 5 serving as a base having a predetermined strength. A motor 6 as a driving unit is fixed, and a toothed motor pulley 7 is fixed to an output shaft of the motor 6 in a state where rotation is stopped by a set screw 8, and a timing belt 10 meshing with the motor pulley 7 The drive pulley 11 is configured to transmit a rotational drive force of a predetermined number of rotations to the drive pulley 11.

On the other hand, on the right side of the base plate 5,
A bearing holder 13 holding a set of bearings 14 provided at intervals is fixed, and an eccentric shaft 12 fixed to the drive pulley 11 using a flathead screw is rotatably supported. are doing. Also,
The flange portion 12a of the eccentric shaft 12 has a shaft 15 at a position eccentric from the axis by a distance E.
Are fixed using a set screw 16 in a state where the rotation is stopped.

The inner race side of the bearing 18 is press-fitted into the shaft 15, and the outer race side of the bearing 18 is fixed to the bottom surface of the bracket 20 serving as the X-axis stage by the holder 19 of the bearing 18. Has become. Further, referring to FIG. 2, both ends of the bracket 20 have arrows x in the drawing.
An X slider 24 for movably holding the bracket 20 in the direction is provided between the Y-axis base 22 serving as a base in the Y-axis direction, and the bracket 20 can be moved in the X-axis direction with respect to the Y-axis base 22. Holding.

Referring further to FIG. 3, a Y-axis base 22 is provided between a lower bracket 23 fixed on a base bracket 21 bent in a U-shape and a Y slider provided between the Y-axis base 22 and the lower base 23. Due to 25, it is held movably in the Y-axis direction in FIG. With the above configuration, the bracket 20 performs an arc motion with the radius E in a state parallel to the base plate 5 with the activation of the motor 6.

The bracket 20 which makes such an arc movement
As shown in the figure, a left side portion of a parallel link member 30 having a cross-sectional shape substantially in the form of a parallel link is fixed, and a bracket 31 fixed at the right side portion of the parallel link member 30 is provided. Has a function of absorbing vibration by finely moving up and down while maintaining a horizontal state. A block 32 having an upper surface inclined at approximately 10 degrees with an angle α is fixed to the bracket 31, and is configured to screw a substantially center of gravity portion of the tray.

In the above configuration, referring to the operation explanatory view of FIG. 5 and FIG. 2, when the driving state of the motor 6 is held and blood is collected in the blood collection bag, the shaft 1 of the eccentric shaft 12
5 is obtained on the tray 3 with the eccentricity E of 5 as the radius. As a result, a vortex flows in the blood bag 1 in the direction of the arrow shown by the broken line, and functions to make the mixing uniform. In addition, by setting the tube inlet side of the blood bag 1 high and setting it in the tray 3, the anticoagulant having different specific gravities and the blood can be mixed more uniformly, and furthermore, after the blood collection is completed, By rotating the blood, the blood that has entered the blood bag immediately before the end can be mixed uniformly with other blood. In addition, since the stepping motor is used, the rotation can be performed in a certain direction for a predetermined time (for example, about 5 to 20 seconds) and then reversed, or by repeating such an operation, the mixing can be further promoted.

In FIG. 1, the drive pulley 11
By controlling the rotation of the motor 6 by detecting the actuator 101 fixed to the edge of the motor with the non-contact sensor 100 including the light receiving and emitting diodes, the rotation accuracy can be further improved.

FIG. 4 is a cutaway view of a main part according to a second embodiment. In this figure, the same components as those already described in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. Only different portions will be described. In this configuration, the base plate 5 is set at an angle α with respect to a desk T on which the device is mounted. A support member 105 is provided to incline by a distance. With this configuration, the inclined portion for mounting the tray 3 of the block 32 can be made parallel as shown in the figure. Numeral 38 denotes a weight measuring means such as a strain gauge.

The bearing holder 19 is fixed to the upper base 35, and at least three or more balls which are prevented from falling off by the retainer 37 are provided between the lower base 23 fixed on the base bracket 21 and the upper base 35. A thrust bearing composed of 36 is interposed, and is configured to support the above-described circular motion. Therefore, according to this configuration, the number of components can be further reduced.

[0031]

As described above, according to the present invention, when blood is collected, the blood in the blood bag is uniformly mixed with the anticoagulant, so that, for example, the blood drawn for the test is coagulated. It is possible to provide a small-sized blood collecting apparatus without any problem.

[0032]

[Brief description of the drawings]

FIG. 1 is a cutaway front view of a main part of a blood collection device according to one embodiment.

FIG. 2 is a plan view showing a state where a tray 3 of FIG. 1 is removed.

FIG. 3 is a left side view of FIG.

FIG. 4 is a cutaway front view of a main part of a blood collection device according to a second embodiment.

FIG. 5 is an operation explanatory diagram.

FIG. 6 is an operation explanatory view of a conventional blood sampling device.

[Explanation of symbols]

 Reference Signs List 1 blood bag 2 tube 3 tray (tray member) 5 base plate (base) 6 motor 7 motor pulley 10 belt 11 drive pulley 12 eccentric shaft 15 shaft 20 bracket (first stage) 21 base bracket 22 bracket (second stage) 24 X slider 25 Y slider E Eccentricity α Tilt angle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-21873 (JP, A) JP-A-2-252441 (JP, A) JP-A-4-82563 (JP, A) 123241 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A61B 5/15 A61M 1/02 570

Claims (15)

(57) [Claims] 1. A blood collection apparatus for collecting blood while stirring while collecting blood in a blood bag, wherein the blood bag is tilted by a predetermined angle with respect to a horizontal plane and in a stationary state. A tray member to be accommodated; support means for movably supporting the tray member in a state inclined by the angle and along a substantially horizontal plane; and rotating the tray member along an arc decentered by a predetermined amount. And a driving means for driving the blood in the blood bag to stir. 2. The blood bag is housed in the tray member with the blood introduction tube side raised, and the angle is set to about 10 degrees with respect to a horizontal plane. Item 6. The blood collection device according to Item 1. 3. The blood collection device according to claim 1, wherein the driving unit is further connected to a control unit for performing the rotation drive after extending the blood collection. 4. The support means comprises: a base; a first stage member movably supported on the base by a first slider member capable of moving in the front-rear (Y) direction; 4. A second stage member movably supported on a stage member by a second slider member capable of moving in the left-right (X) direction.
The blood collection device according to any one of the above. 5. The supporting means includes: a base member; a stage member capable of moving in the front-rear (Y) and left-right (X) directions at an upper portion of the base; The blood collection device according to any one of claims 1 to 3, comprising a thrust bearing interposed between the blood sampling device and the thrust bearing. 6. The pressure is reduced by a vacuum pump,
The blood collection apparatus according to claim 1, further comprising a vacuum blood collection chamber in which a blood bag is set, wherein blood is collected from the blood bag by negative pressure generated in the vacuum blood collection chamber. 7. A blood collection chamber for measuring the amount of blood collected in the blood bag, and a vacuum blood collection chamber based on a comparison between an increase in the measured value of the blood collection amount and a predetermined increase. 7. The blood collecting apparatus according to claim 6 , further comprising an automatic control unit for automatically controlling the negative pressure of the blood. 8. The apparatus according to claim 6, wherein the automatic control means keeps reducing the negative pressure level of the vacuum blood collection chamber until the rate of increase of the measured value reaches a predetermined rate of increase. Blood collection device. Wherein said automatic control means, when the increase rate of the measured value reaches a predetermined increase rate, according to claim 7, wherein the controller controls so as to maintain the negative pressure level of the vacuum blood collection chamber The blood collection device according to item 1. 10. The automatic control means is configured to control a negative pressure level of the vacuum blood collection chamber so that a rate of increase of a measured value maintains a predetermined rate of increase. Item 8. The blood collection device according to Item 7 . 11. The blood collection apparatus according to claim 8 , wherein the predetermined increase rate is a saturation increase rate. 12. The blood collection apparatus according to claim 8 , wherein the predetermined increase rate is an increase rate pattern. Wherein said automatic control means, according to claim characterized in that it is configured to stepwise pressure reduction control 7
The blood collection device according to item 1. 14. The apparatus according to claim 1, wherein said driving means is configured to control said blood.
Blood collection is performed while rocking the bag, and the tray for storing the blood bag by the driving means even after the blood collection is completed.
The blood collection apparatus according to claim 1, further comprising a swing extension time setting means for extending and swinging the member . 15. The data of the swing extension time set by the swing extension time setting means is stored in a storage means which is rewritable and readable and at least a supply of a power supply voltage can hold stored data. Claim 14
The blood collection device according to item 1.