JPH0850086A - Blood suction apparatus - Google Patents

Abstract

PURPOSE:To provide a blood suction apparatus cable of simply and rapidly sucking blood by a large number of blood sedimentation measuring pipettes, not troublesome to adjust a zero point, having no fear of spilling blood, simple in constitution, easy to operate and low in measuring cost. CONSTITUTION:A blood suction apparatus is constituted of a pipette closing member 2 closing the upper end opening part of an erythrocyte sedimentation rate measuring pipette A, the closing member support member 3 fixing the pipette closing member 2, a blood inflow preventing container 4, a suction pump 5, the connection tube 6 connecting the pipette closing member 2 and the blood inflow preventing container 4 and the connection tube 7 connecting the blood inflow preventing container 4 and the suction pump 5. The pipette closing member 2 is composed of a soft synthetic resin and has the spherical recessed part 2a coming into contact with the upper end opening part of the erythrocyte sedimentation rate measuring pipette A and an air flow port 2c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood suction device for sucking blood collected in a blood collection tube into a blood sedimentation measuring pipette.

[0002]

2. Description of the Related Art In order to measure a blood sedimentation rate, it is necessary to suck blood collected in a blood collection tube into a blood sedimentation measuring pipette so that the height of a blood column coincides with a 0-point scale display. In order to aspirate blood into a blood sedimentation pipette, conventionally, the lower end opening of the blood sedimentation pipette is inserted into the blood sample in the blood collection tube, and the operator directly puts a mouth on the upper end opening to allow blood sedimentation. By sucking the air in the measuring pipette, the blood is sucked from the blood collection tube to the blood sedimentation measuring pipette.

However, when the measurer directly attaches the mouthpiece to the blood sedimentation measuring pipette and aspirates, the measurer accidentally swallows blood containing pathogenic bacteria, viruses, etc., resulting in so-called biohazard. There was a problem that occurs. In order to prevent such biohazard, recently, a method has been adopted in which blood is drawn into the blood sedimentation measurement pipette by a dedicated instrument or device without the measurer directly touching the blood sedimentation measurement pipette. .

[0004] For example, generally, a hollow spherical rubber suction device is attached to the upper end opening of a blood sedimentation pipette, and the rubber suction device is manually pressed and compressed by a measurer to make a rubber suction. A method is adopted in which blood is sucked into a pipette for blood sedimentation by depressurizing the inside of the device.

Further, a soft tube having a needle portion at the lower end is used instead of the blood sedimentation pipette, the opening of the blood collection tube for collecting blood is closed with a rubber seal, and the needle portion of the soft tube is Developed a device that sucks blood into a soft tube by puncturing a rubber seal, connecting the upper end opening to a plunger arranged on a blood sedimentation stand, and operating the plunger while holding the blood collection tube upside down Has been done.

Further, as disclosed in Japanese Patent Laid-Open No. 49-106185, a blood sedimentation measuring pipette and a blood container are supported at a peripheral portion of a rotatable disc-shaped support table at equal intervals in the circumferential direction, and one end portion thereof is supported. The other end of the tube connected to the suction pump can be freely connected to the upper end opening of the blood sedimentation measurement pipette at a predetermined position, and a 0-point adjusting mechanism including a photoelectric switch and a limit switch is attached, and the support base is intermittently installed. A device has also been developed in which the blood is sequentially drawn into a pipette for measuring the blood sediment by rotating the pipette in the direction of the arrow.

[0007]

However, in the method using the rubber suction device, it is difficult to adjust the compression amount of the rubber suction device to adjust the zero point together with the blood suction. It is necessary to remove the rubber suction tool and close the upper end opening of the blood sedimentation pipette by hand to make a fine adjustment to adjust the 0 point. The 0 point adjustment is extremely troublesome, and blood is removed when the rubber suction tool is removed. There was a risk of spilling.

Further, in the device using the soft tube having the needle portion, the dedicated soft tube and the rubber seal are made disposable, so that the cost for the measurement becomes high and the rubber seal is suitable. If you do not puncture the needle part of the soft tube in some places, the needle part will break and you will not be able to use it.
Furthermore, there is a risk that blood will be spilled when the needle portion of the soft tube is pierced through the rubber seal or when the blood collection tube is held upside down.

On the other hand, the device disclosed in JP-A-49-106185 has a complicated mechanism,
Since the device is inevitably expensive, and the number of blood sedimentation measurement pipettes that can be supported on the disk-shaped support table is limited,
When aspirating blood into a large number of tens or hundreds of pipettes for measuring blood sediment at the same time, it takes time and labor to replace the pipettes for blood sedimentation, which is rather inconvenient.

The present invention has been made in view of the above problems in the prior art, and it is possible not only to prevent biohazard but also to easily and quickly aspirate blood into a large number of blood deposition measuring pipettes. It is an object of the present invention to provide a blood suction device that can be adjusted, is not troublesome to adjust, and has no risk of spilling blood, has a simple configuration, is easy to operate, and has a low measurement cost.

[0011]

In order to achieve the above-mentioned object, a blood suction device of the present invention comprises a pipette closing member for closing an upper end opening of a blood sedimentation measuring pipette, and a closing member for fixing the pipette closing member. A support member, a blood inflow prevention container, a suction pump, a connection tube connecting the pipette closing member and the blood inflow prevention container, and a connection tube connecting the blood inflow prevention container and the suction pump It is what is done.

In order to adjust the blood suction speed by changing the degree of sealing of the upper end opening of the blood sedimentation pipette,
The pipette closing member is made of a soft synthetic resin material,
It is preferable to form a spherical concave portion that comes into contact with the upper end opening of the blood sedimentation measuring pipette and also to form an air circulation hole 2c.

Further, the closing member supporting member is configured to be able to perform the suction work corresponding to the posture of the operator and to perform the suction at the suction speed corresponding to the difference in the adhesiveness of the collected blood. It is composed of a mounting part and a strut pressing part, and the relative angle between the closing member mounting part and the strut pressing part can be set as appropriate, and the pipette closing member can be projected and fixed by an appropriate length from the closing member mounting part, and the strut pressing part can be fixed to the strut. It is preferable that it can be fixed at an appropriate height.

Further, since the suction pressure in the connection tube is adjusted to perform suction at a suction speed corresponding to the difference in the adhesiveness of the collected blood, the pressure between the pipette closing member and the blood inflow prevention container is reduced. You may install an adjustment member.

[0015]

[Operation] If the suction pump is operated, the lower end opening of the blood sedimentation pipette is inserted into the blood in the blood collection tube, and the upper end opening is brought into contact with the spherical concave portion of the pipette closing member, the air inside the blood sedimentation pipette is aerated. Is sucked, the inside of the blood sedimentation measuring pipette is depressurized, and blood is sucked into the blood sedimentation measuring pipette from the blood collection tube.

By finely adjusting the contact pressure and the angle between the upper end opening of the blood sedimentation measuring pipette and the spherical concave portion of the pipette closing member during blood suction, the sealing degree of the upper end opening of the blood sedimentation measuring pipette can be changed. The blood suction speed can be adjusted, and the blood suction speed can be further adjusted by adjusting the suction pressure in the connection tube by operating the pressure adjusting member.

By installing the blood inflow prevention container,
Even if the blood is sucked into the air circulation hole of the pipette closing member, the blood does not flow into the suction pump and the function of the suction pump is not hindered.

[0018]

EXAMPLE An example of the blood suction device of the present invention will be described.
A description will be given with reference to the drawings. As shown in FIG. 1, the blood suction device 1 includes a pipette closing member 2, a closing member supporting member 3, a blood inflow prevention container 4, a suction pump 5, and connecting tubes 6 and 7.

As shown in FIG. 2, the pipette closing member 2 is a cylindrical body molded from a soft synthetic resin material, and has a spherical concave portion 2a formed in the front portion for contacting the blood-sink measuring pipette A and a rear portion thereof. Is a connecting pipe fitting hole 2b into which the connecting pipe 8 is fitted.
Is formed, and the spherical recess 2a and the connecting pipe fitting hole 2b are communicated with each other by a minute diameter air circulation hole 2c. As the soft synthetic resin material, it is preferable to use a synthetic rubber having high flexibility, water resistance and chemical resistance such as silicone rubber.

As shown in FIG. 3, the closing member supporting member 3 is composed of a closing member mounting portion 9 and a pillar pressing portion 10, and a fitting concave portion 9a of the closing member mounting portion 9 has a fitting convex portion of the pillar pressing portion 10. The portion 10a is rotatably fitted, and the angle adjustment screw 11 is screwed into the screw hole 9b, whereby the relative angle between the closing member attachment portion 9 and the column pressing portion 10 can be set appropriately. The closing member mounting portion 9 has a closing member mounting hole 9
The pipette closing member 2 is attached to the closing member attaching portion 9 by inserting the connecting pipe 8 into the closing member attaching hole 9c and screwing the length adjusting screw 12 into the screw hole 9d.
It can be fixed by protruding more appropriately.
Further, the column pressing portion 10 is provided with a column insertion hole 10b, and the column 13 is inserted into the column insertion hole 10b, and the height adjusting screw 14 is screwed into the screw hole 10c. The column 13 can be fixed at an appropriate height.

As shown in FIG. 1, the blood invasion prevention container 4 is composed of a main body 15 and a lid body 16, and is mounted on a container mounting portion 17a projecting upward from the upper surface of the case 17.
The lid 16 is provided with openings 16a and 16b. The lower end of the connecting pipe 19 of the pressure adjusting member 18 is opened through the opening 16a and the lower end of the connecting pipe 20 is opened through the opening 16b.
It is inserted inside. The pressure adjusting member 18 is the connecting pipe 1.
A pressure adjusting valve 21 is installed at an appropriate position in the valve 9. By rotating the pressure adjusting valve 21, the flow rate of air sucked from the connection tube 6 is changed so that the suction pressure can be adjusted.

The suction pump 5 is installed in the case 17, reaches an ultimate vacuum of -250 mmHg, and has an opening flow rate of 7 Nl /.
Although a vacuum pump of about min is used, a blood sedimentation measuring pipette A having a specification capable of sucking blood at an appropriate speed may be used.

A power switch 22 is provided on the front of the case 17.
Further, the operation lamp 23 is provided, the tube take-out hole 17b is formed in the rear surface, and the support column 13 is provided upright in the upper surface. Further, in order to keep the center of gravity of the entire apparatus at a low position and improve the stability, a heavy plate member 24 such as an iron plate is fixed to the bottom surface of the case 17.

The connecting tube 6 has one end connected to one end of the connecting pipe 8 and the other end connected to the upper end of the connecting pipe 19, and the connecting tube 7 has one end connected to the upper end of the connecting pipe 20 and the other end. Is connected to the suction port 5a of the suction pump 5.

Next, the method of use and operation of the blood suction device 1 of the present invention will be described. First, the closing member support member 3
Is moved in the vertical direction of the column 13, the height adjusting screw 14 is tightened to set the height position of the closing member supporting member 3, the closing member mounting portion 9 is rotated with respect to the column pressing portion 10, and the angle adjusting screw is set. Tighten 11 to set the inclination angle of the closing member mounting portion 9. Further, the connecting pipe 8 is moved in the axial direction of the closing member mounting hole 9c, and the length adjusting screw 12 is tightened to set the protruding length of the pipette closing member 2.

By appropriately setting the height position of the closing member supporting member 3, it is possible to perform suction work corresponding to the posture of the worker such as standing posture and sitting posture, and the inclination angle of the closing member mounting portion 9 is set appropriately. If set, the suction can be performed at a suction speed corresponding to the difference in the degree of adhesion of the collected blood, and if the protruding length of the pipette closing member 2 is set appropriately, the operator can touch the support column 13 by hand. It is possible to perform suction work with plenty of time.

On the other hand, the power switch 22 is pressed to operate the suction pump 5 and the pressure adjusting valve 21 is operated to adjust the suction pressure in the connecting tube 6. By operating the pressure regulating valve 21 as described above, blood can be sucked at a suction speed corresponding to the difference in the adhesiveness of the collected blood.

Then, the blood collection tube B is grasped with one hand and the blood sedimentation measurement pipette A is grasped with the other hand, the lower end portion of the blood sedimentation measurement pipette A is inserted into the blood in the blood collection blood vessel B, and the upper end portion is inserted. It abuts on the spherical recess 2 a of the pipette closing member 2.

As a result, the air in the blood sedimentation pipette A circulates through the air passage hole 2c of the pipette closing member 2, the connecting pipe 8, the connecting tube 6, the blood invasion preventing container 4, and the connecting tube 7, and the suction pump 5 is introduced. Is sucked into. Therefore, the inside of the blood sedimentation measuring pipette A is depressurized, and the blood is drawn from the blood collection tube B into the blood sedimentation measuring pipette A.

By installing the blood inflow prevention container 4, even if the blood is sucked into the air circulation hole 2c of the pipette closing member 2, the blood is prevented from flowing into the blood intrusion prevention container 4 and is sucked. Since blood does not flow into the pump 5, the function of the suction pump 5 is not hindered.

When the blood is sucked, the contact pressure and the angle between the upper end opening of the blood sedimentation measuring pipette A and the spherical concave portion 2a of the pipette closing member 2 are finely adjusted by hand, whereby the upper end of the blood sedimentation measuring pipette A is adjusted. It is possible to adjust the blood suction speed by changing the degree of sealing of the opening, and it is possible to perform suction corresponding to the difference in the adhesiveness of the collected blood.

When blood is sucked up to a position slightly higher than the 0-point scale display of the blood sedimentation pipette A, the upper end opening of the blood sedimentation pipette A is inserted into the spherical recess 2 of the pipette closing member 2.
At the same time as being separated from a, the upper end opening is closed by pressing with a finger. Then, by finely adjusting the pressing force of the finger that closes the upper end of the blood sedimentation measurement pipette A, a small amount of blood is returned from the lower end opening of the blood sedimentation measurement pipette A to the blood collection tube B, and the blood of the blood sedimentation measurement pipette A is removed. Match the height with the 0-point scale display.

During the zero-point adjustment work, the upper end opening of the blood sedimentation measuring pipette A may be gently separated from the spherical concave portion 2a of the pipette closing member 2, so that blood is not spilled.

As described above, the suction to the blood sedimentation measuring pipette A is performed by simply abutting the upper end portion of the blood sedimentation measuring pipette A with the spherical concave portion 2a of the pipette closing member 2, and thus the operation is simple and many. Even when the blood is sucked into the blood-precipitation measuring pipette A, it can be performed easily and in a short time.

[0035]

According to the blood suction device of the present invention, the blood can be sucked into the blood sedimentation measuring pipette simply by bringing the upper end of the blood sedimentation measuring pipette into contact with the spherical concave portion of the pipette closing member. The operation is extremely simple, and blood can be sucked into a large number of blood-precipitation measuring pipettes in a short time.

Since the suction pressure in the connection tube can be adjusted by operating the pressure adjusting member, and the contact pressure and angle can be finely adjusted to change the degree of sealing of the upper end opening of the blood sedimentation pipette. Therefore, the blood suction rate can be adjusted, and suction can be performed in accordance with the difference in the adhesiveness of the collected blood.

Further, at the time of zero-point adjustment work, it is sufficient to gently separate the upper end opening of the blood sedimentation measuring pipette from the spherical concave portion of the pipette closing member, so that zero-point adjustment is not troublesome.
There is no risk of spilling blood.

Further, the blood suction device of the present invention has an extremely simple structure mainly including the pipette closing member, the closing member supporting member, the blood inflow prevention container and the suction pump, and uses a general-purpose blood sedimentation pipette. Therefore, the cost of measurement is low.

Further, since the blood inflow prevention container is installed, the blood does not flow into the suction pump and hinders the function of the suction pump, and the height position of the closing member supporting member and the closing member mounting portion are prevented. Since the inclination angle and the protruding length of the pipette closing member can be freely set, the efficiency of suction work can be improved, which is extremely convenient.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a blood suction device of the present invention.

FIG. 2A is a left side view of the pipette closing member, and FIG.
Is a front view, (C) is a right side view, and (D) is a vertical sectional view.

3A is a front view and FIG. 3B is a vertical sectional view of a closing member supporting member.

FIG. 4 is an explanatory view showing a usage state of the blood suction device of the present invention.

FIG. 5 is a cross-sectional view showing a state in which the contact angle is finely adjusted to change the degree of sealing of the upper end opening of the blood sedimentation measurement pipette.

[Explanation of symbols]

 1 Blood Suction Device 2 Pipette Closing Member 2a Spherical Recess 2c Air Circulation Hole 3 Closing Member Supporting Member 4 Blood Inflow Prevention Container 5 Suction Pump 6,7 Connection Tube 9 Closing Member Mounting Part 10 Strut Pressing Part 18 Pressure Adjusting Member A Blood Sink Measurement Pipette

Claims (4)

[Claims] 1. A pipette closing member for closing an upper end opening of a blood sedimentation pipette, a closing member supporting member for fixing the pipette closing member, a blood inflow prevention container, a suction pump, the pipette closing member, and the pipette closing member. A blood suction device comprising a connection tube connecting a blood inflow prevention container and a connection tube connecting the blood inflow prevention container and the suction pump. 2. The pipette closing member is made of a soft synthetic resin material, and has a spherical concave portion that comes into contact with the upper end opening of the blood sedimentation pipette and an air circulation hole 2c. The blood suction device according to claim 1. 3. The closing member support member includes a closing member mounting portion and a support pressing portion, and a relative angle between the closing member mounting portion and the support pressing portion can be set as appropriate, and the pipette closing member is connected to the closing member mounting portion. The blood suction device according to claim 1 or 2, wherein the length can be appropriately projected and fixed, and the strut pressing portion can be fixed at a proper height of the strut. 4. The blood suction device according to claim 1, wherein a pressure adjusting member is provided between the pipette closing member and the blood inflow prevention container.