JPH0595937A - Blood sampler - Google Patents

Abstract

PURPOSE:To achieve a sampling of a trace of blood from a blood capillary with neither intense stimulation nor sense of fear being applied and moreover, suction and storage thereof simultaneously. CONSTITUTION:A mobile body 8 which has a working rod 11 set in extension is positioned free to advance or retract with a working cylinder 17 assembled into the working rod in such a manner as to be kept from slipping off while being free to advance or retract at the tip of a piston 10 within a linear cylinder shaped casing 1 and moreover, a roughly cylindrical blood reservoir 19 which holds a pricking needle 30 inside in such a manner as to be kept from slipping off while being free to advance or retract is mounted at the tip of the casing 1. The pricking needle 30 can be advanced quickly by a magnetic force while the inside of the mobile body 8 is made negative in the traction thereof to allow the storing of blood into the blood reservoir 19.

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 for collecting a very small amount of blood.

[0002]

2. Description of the Related Art A medical examination of blood is essential for medical treatment, and it is always necessary to collect a predetermined amount of blood from a patient. And, as the means for collecting blood, conventionally, a case where blood is drawn from a vein with an appropriate syringe, a fingertip,
In most cases, the skin such as an ear lobe was damaged and a few drops of blood were collected.

The former means, especially when a certain amount of blood is collected, gives a feeling of pain and fear at the time of puncturing, and has a disadvantage that it must be done by a specialist such as a doctor or a nurse. However, it is indispensable for multi-item inspections, but is not frequently performed. On the other hand, the latter means is particularly adopted at the time of a diabetes test, and a small amount of blood can be collected at one time, but it is frequently done.

That is, as is well known, in diabetic diseases, the blood glucose concentration in the blood of a patient must be constantly monitored, and the blood sampling frequency is high, for example, before meals, after meals, and before bedtime. In some cases, it goes up to 7 times a day. A small amount of blood can be collected for each blood glucose concentration test, but the burden on the patient is extremely large because it is frequent. This burden is, for example, pain and fear at the time of puncture, but blood cannot be collected except from sensitive fingertips of the nerves or earlobe, so this burden is doubled. There is also a problem that many scars remain and infection is likely to occur due to the invasion of bacteria.

In order to reduce such a burden on the patient as much as possible, the prior art is disclosed in, for example, Japanese Patent Laid-Open No. 1-185245.
Alternatively, the invention disclosed in JP-A-62-38140 has been proposed.

[0006]

However, the former invention does not alleviate the burden on the patient in the prior art in that blood is collected from the fingertip, and the puncture needle utilizes the elastic force of the contracted coil spring. Is to move forward,
The puncture action of the puncture needle is strong, and the fear of pain and especially sound and vibration cannot be eliminated. Further, in this configuration, the structure for ensuring the operation of the coil spring is complicated, and it takes time to assemble, and further, in operation, a preliminary operation of temporarily compressing the spring is required, which makes it difficult to handle. Become.

In this respect, the latter invention is capable of collecting blood even at a portion other than the fingertip, and by drawing a certain negative pressure in the blood collecting device, the blood can be sucked out from the portion damaged by the puncture needle. Although the location is not limited and the burden and pain of the wound is reduced, the advancement of the puncture needle uses the elastic force of the coil spring as in the case above, so the problem pointed out in the former invention is solved. Is not. Further, the structure must be such that a negative pressure state can be obtained by a predetermined operation, and therefore the structure is further complicated.

Further, the blood thus collected is inspected, for example, by allowing it to soak into a predetermined test paper for a certain period of time. When blood is collected from the arm, it adheres to the test paper or the like. There is the inconvenience of twice having to collect the sample and allowing it to soak into the test strip, which not only has the possibility of wasting blood, but also the risk of the examiner touching the patient's blood directly. ..

Therefore, the present invention was developed to solve the above-mentioned drawbacks, inconveniences, and problems of the prior art.
A small amount of blood can be collected from the capillaries without giving a strong irritation or fear to the patient, and the collected blood is not only simply blown out onto the skin but also can be sucked and stored at the same time.

[0010]

According to the blood collecting device of the present invention, a closed cylinder tube portion is provided at a base end portion thereof, and a fitting cylinder portion having an open front end is provided at a tip end portion thereof to be fitted with the cylinder tube portion. A straight cylindrical casing in which the tubular portion is communicated with a guide passage having a reduced diameter at the axial center position, and a first magnet is further provided on the tip end wall surface of the guide passage, and the base end of the cylinder tubular portion of the casing. A piston is provided at the tip of the cylinder rod that penetrates through and is located in the cylinder barrel so that it can move forward and backward, and the action rod of the movable body has an extension rod at the tip of the piston. In addition, it is installed so that it can move forward and backward, and a second magnet is installed in the tip part, and it is arranged so that it can move forward and backward in the guide passage, and the tip part projects into the fitting tube part at the limit of forward movement. , The base end is the fitting tube of the casing In addition to a fitting cylinder part that is tightly fitted inside, an opening is formed in the base end surface into which the forward end of the working cylinder advances, and a tapered concave portion is provided on the flat distal end surface. And a puncture needle that is housed in the blood reservoir such that it cannot be pulled out and that can be moved forward and backward, and that projects from the through hole when the action cylinder advances. In the predetermined advance position of the action cylinder, the action cylinder can be rapidly advanced by the mutual magnetic force between the first magnet of the casing and the second magnet of the action cylinder.

In the retracted posture of the action cylinder, the first magnet is located near the base end, the second magnet is located near the tip end, axially opposed to each other, and the polarity on the base end side of the first magnet is , The same polarity as the tip side of the second magnet.

Alternatively, in the retracted posture of the action cylinder, the base end of the first magnet and the front end of the second magnet are radially opposed to each other, and the polarity of the base end side of the first magnet is large. And the polarity on the tip side of the second magnet is different.

Further alternatively, when the working cylinder is in the retracted position, the first magnet and the second magnet are directly opposed to each other in the radial direction, and the polarity on the base end side of the first magnet and the second magnet The polarity of the tip side of the magnet is the same.

Further, a pressing body is movably moved forward and backward in the base end portion of the assembling cylinder which is assembled in an attitude extending to the base end of the casing and whose both ends are open so as to project from the base end of the assembling cylinder. Assembling, an elastic material that repels in the axial direction is arranged between the assembling cylinder and the pressing body, and further, the base end of the cylinder rod of the movable body is attached to the pressing body.

The first magnet of the casing may have a ring shape and may be concentrically arranged in the guide passage.

A short cylinder-shaped projection may be provided on the peripheral edge of the concave portion on the tip surface of the blood reservoir, or an adhesive seal may be attached to the tip surface of the blood reservoir.

At least a part of the peripheral wall of the blood reservoir is made of a transparent material.

A tubular guide tubular portion communicating with the through hole is provided in the blood reservoir along the axial direction.

It is preferable to dispose an axially repulsive elastic material between the puncture needle and the blood reservoir.

[0020]

Therefore, when the cylinder rod of the movable body penetrating the base end of the cylinder tube portion is advanced in the tip direction, the action rod extended to the tip also advances, and the action rod has the tip of the second magnet. And the working cylinder is advanced in the guide passage of the casing.

In the standby stage before advancing the movable body, FIG.
As shown in the above, the second magnet in the working cylinder located closer to the base end when viewed from the whole and the first magnet on the wall surface of the casing front end located closer to the tip when viewed from the whole are opposed to each other along the axial direction. In such a posture, if the polarity of the first magnet on the base end side and the polarity of the second magnet on the front end side are made the same, the magnetic repulsion between them will occur.

Nevertheless, when the movable body is forcibly moved forward, the first magnet and the second magnet are located at positions substantially opposite to each other in the radial direction. Then, since the base end side of the first magnet and the base end side of the second magnet, and the tip end side of the first magnet and the tip end side of the second magnet have different polarities, they are mutually magnetic. , The second magnet advances away from the action rod at the tip of the movable body that was in contact with the advance of the movable body,
Along with this, in the working cylinder containing the second magnet, only the working cylinder advances independently and rapidly in the guide passage due to the advance of the second magnet, and the tip end of the working cylinder fits into the casing. It will project into the fitting part. In this case, the working rod is housed in the working cylinder such that it cannot be pulled out and can be moved forward and backward. Therefore, even if the working cylinder projects into the fitting cylinder portion, it does not further pop out, and the amount of projection is restricted. ..

On the other hand, the fitting tube portion of the blood reservoir is tightly fitted in the fitting tube portion, but since the base end surface of this fitting tube portion has an opening, the forwardly projecting action tube portion is formed. The tip portion penetrates into the fitting tube portion and advances the puncture needle stored in the blood reservoir to project it from the through hole.

Therefore, at the time of collecting blood, when the flat distal end surface of the blood reservoir is strongly pressed against the skin to advance the movable body, the first magnet and the second magnet magnetically attract each other at a certain stage. As a result, the action cylinder rapidly advances, and the puncture needle in the blood reservoir is projected from the through hole to pierce the skin.

When the puncture needle and the movable body are retracted,
Due to the action of the piston, the guide passage and the blood reservoir have a negative pressure, and the recess also has a negative pressure. Therefore, a part of the skin rises in the tapered concave portion, and a small amount of blood gushes from the capillaries at the skin puncture site and collects on the surface.
Due to the negative pressure that accompanies the retreat of the movable body, the blood in the concave portion flows into the blood reservoir from the through hole as the puncture needle retracts, and blood is collected.

In the standby stage before advancing the movable body, FIG.
As described above, the retracting posture of the working cylinder is set so that the base end of the first magnet and the tip end of the second magnet are opposed to each other in the radial direction, and the polarity on the base end side of the first magnet is set. When the polarities of the second magnet and the tip side of the second magnet are made different, both magnets magnetically attract each other in this state and attitude, and a temporary stable state is obtained.

Therefore, when the movable body is forcibly advanced to displace the second magnet, the poles of the first magnet and the poles of the second magnet are opposed to each other in the radial direction, so that they are magnetic from each other. To the position where the distal end of the first magnet and the proximal end of the second magnet face each other in the radial direction, that is, both magnets again The action cylinder is rapidly advanced until the magnetically attracting posture, and the puncturing operation similar to the above is performed.

Alternatively, in the standby stage before advancing the movable body, as shown in FIG. 6, the retracting posture of the working cylinder is set so that the first magnet and the second magnet are directly opposed to each other in the radial direction. However, if the polarities of the base end side of the first magnet and the front end side of the second magnet are made different, both magnets magnetically attract each other even in this state posture, and a stable state is obtained. become.

Therefore, when the movable body is forcibly advanced to displace the second magnet, the tip end of the first magnet and the base end of the second magnet, which have the same polarity, face each other in the radial direction. Therefore, the posture in which the second magnets repel each other and the second magnet passes through the inside of the first magnet and is fully charged and separated in the tip direction of the first magnet, that is, both magnets do not affect each other magnetically. Until, the action tube rapidly advances and the puncturing operation similar to the above is performed.

If the pressing body is assembled to the assembly cylinder extendedly assembled to the base end of the casing, the movable body can be easily moved forward, and the assembly cylinder and the pressing body are repelled in the axial direction. If the elastic material is arranged and the base end of the cylinder rod is attached to the pressing body, the backward movement and return of the movable body after the puncture can be quickly achieved.

If the ring-shaped first magnets are concentrically arranged in the guide passage, the working cylinder containing the second magnet will pass through the first magnet. The mutual magnetic influence of the magnet and the second magnet becomes more reliable, and the desired operation is obtained.

When the flat end surface of the blood clot is strongly pressed against the skin during blood collection, the airtightness of the recess is maintained, so that the spouted blood can be easily sucked. It can relieve pain during puncture. In other words, this pressing compresses the pain point in the vicinity of the punctured portion, and the stimulus to the punctured portion is dispersed and relieved. Therefore, it is effective to limit this pressing to a certain small range. A short tube-shaped projection is provided on the peripheral edge of the concave portion of the blood reservoir distal end surface, and this projection becomes an effective means for pressing stimulation. ..

If an adhesive seal is attached to the distal end surface of the blood clot, the blood clot can be maintained in a clean state before the start of use, and when the seal is peeled off during use, Since a small amount of adhesive force remains on the distal end surface of the blood reservoir, the adhesion to the skin becomes stronger and the airtightness inside the recess is further enhanced during blood suction.

If at least a part of the peripheral wall of the blood reservoir is made of a transparent material, the amount of collected blood can be visually recognized from the outside, and a test strip is inserted into the blood reservoir to optically measure the blood glucose concentration. Can be inspected from outside.

The movable body is retracted to bring the inside into a negative pressure state,
Even if blood is sucked, the negative pressure state is canceled when the tip of the blood reservoir is separated from the skin, so the blood stored in the blood reservoir may splatter inward or dripping from the through hole. There is a risk of being lost. Therefore, a tubular guide tubular portion communicating with the through hole is provided in the blood reservoir along the axial direction so that the blood in the blood reservoir is stored inside and does not overflow.

Furthermore, if an elastic material that repels in the axial direction is arranged between the puncture needle and the blood reservoir, when the working cylinder retracts due to the retracting and returning of the movable body, the puncture needle also repels due to the repulsive force of this elastic material. It will retreat and quickly escape from the skin. And
Before use, the needle tip does not protrude from the tip so that cleanliness and safety can be ensured.

[0037]

Embodiments of the present invention will be described below with reference to the drawings. The linear cylindrical casing 1 has a base end portion which is a cylinder cylinder portion 2 whose base end is open, and a distal end portion which is a fitting cylinder portion 3 whose end is open. 2 is provided with a small-diameter guide passage 5 that communicates with the fitting tubular portion 3, and a ring-shaped first magnet 6 is concentrically formed with the guide passage 5 on the wall surface of the tip end portion of the guide passage 5. The guide passage 5 is embedded so as not to be embedded in the guide passage 5.

The first magnet 6 is a permanent magnet, as shown in FIG.
In the case of the embodiment shown in FIG. 3, the polarity of the casing 1 on the base end side is N pole and the polarity on the tip end side is S pole.

As a result of the guide passage 5 having a small diameter, the suction force at the time of negative pressure can be generated more effectively,
Further, the contact step portion 7 is formed in the continuous portion with the cylinder tubular portion 2. Furthermore, the inner peripheral surface of the fitting tubular portion 3 is a tapered wall whose diameter increases toward the tip.

The movable body 8 is provided with a disc-shaped piston 10 having an outer diameter substantially equal to the inner diameter of the cylinder tube portion 2 at the tip of the cylinder rod 9, and the tip of the piston 10 is larger than the inner diameter of the guide passage 5. The working rod 11 having a sufficiently small diameter is extendedly provided, and the O-ring 12 is mounted on the circumferential surface of the piston 10. The male rod is circumferentially provided on the circumferential surface of the base end portion of the cylinder rod 9, and the working rod 11 is provided. The front end of the cylinder is an expanded diameter locking portion 13, and the cylinder rod 9 and the piston 10 can move forward and backward in the cylinder tube portion 2, and the working rod 11 can move forward and backward in the guide passage 5. By mounting the O-ring 12, not only the operation of the movable body 8 becomes smooth but also negative pressure suction becomes more reliable.

The assembling cylinder 14 which is extendedly assembled by tightly fitting the tip end into the base end of the casing 1 has a tubular shape with both ends open, and the inner diameter is reduced in three steps from the base end to the tip. The inner diameter of the tip portion is substantially equal to the outer diameter of the cylinder rod 9, and the inner diameter of the base end portion is substantially equal to the outer diameter of the pressing body 15.

The cylindrical pressing body 15 with its base end closed is
The assembly cylinder 14 is assembled in the base end portion of the assembly cylinder 14 so as to be able to move forward and backward while projecting from the base end of the assembly cylinder 14, and is screwed into the male screw thread of the cylinder rod 9 in the base end portion. The inner diameter of the distal end portion, which is expanded by encircling the female screw thread, is equal to the inner diameter of the central portion of the assembling cylinder 14 described above. Therefore, the cylinder rod 9 is screwed into the proximal end portion of the pressing body 15, and the pressing body 15 is assembled into the assembling cylinder 14 so as to project from the proximal end. The elastic member 16 made of a coil spring is arranged in the gap formed in the base end portion of the above to repel the assembling cylinder 14 and the pressing body 15 in the axial direction.

In this case, the pressing body 15 and the cylinder rod 9
It is possible to change the length of the cylinder rod 9 and adjust the elastic force and the suction force of the elastic material 16 by adjusting the screwing form with. That is, if the elastic force of the elastic material 16 is loosened, the pressing resistance against the pressing body 15 is weakened, so that the fear can be eased when the blood collection operation is performed by itself. However, when the elastic body is restored and the pressing body 15 is retracted, it is necessary to adjust so that a suction force to the extent that a negative pressure is surely generated in the cylinder tubular portion 2 can be generated. Further, when the length of the cylinder rod 9 becomes shorter, the reciprocating stroke of the piston 10 becomes smaller, so that the suction force becomes weaker.

Next, the action cylinder 17 is a linear cylinder slightly longer than the guide passage 5 of the casing 1 and having an outer diameter substantially equal to the inner diameter of the guide passage 5, and the diameter of the base end opening is the action of the movable body 8. The outer diameter of the rod 11 is equal to the outer diameter of the rod 11. Therefore, when the working rod 11 is assembled, the locking portion 13 at the distal end of the working rod 11 locks at the base end to prevent the working rod 11 from slipping out. It can move forward and backward freely.

The second magnet 18 housed in the tip of the working cylinder 17 is a permanent magnet, and in the case of the embodiment shown in FIG. 4, the polarity on the base end side of the working cylinder 17 is the S pole. , And the polarity on the tip side is N pole.

The operation of the working cylinder 17 of the embodiment shown in FIG. 4 is as follows. When the movable body 8 retracts, the action cylinder 17
The second magnets 18 in the inside are located closer to the base end, and the first magnets 6 on the wall surface of the tip end portion of the casing 1 are located closer to the tip end and face each other along the axial direction. (Fig. 4a). Then, when the movable body 8 is moved forward, the different poles of the first magnet 6 and the second magnet 18 magnetically attract each other, and the first magnet 6 and the second magnet 18 move in the radial direction. The second magnet 18 is forwardly displaced to a position directly opposite (Fig. 4b), and only the action cylinder 17 independently and rapidly advances in the guide passage 5 during this displacement.

The operation of the working cylinder 17 of the embodiment shown in FIG. 5 is as follows. When the movable body 8 is retracted, the base end of the first magnet 6 serves as an N pole, the tip end of the second magnet 18 serves as an S pole, and the base end and the tip end are radially opposed to each other. It is magnetically attracted to and is in a stable state (Fig. 5a). Then, when the movable body 8 is moved forward, the first magnet 6
And the second magnet 18 have the same poles repelling each other, the second magnet 18 passes through the inside of the first magnet 6, and the tip of the first magnet 6 and the base of the second magnet 18 The second magnet 18 is displaced forward (FIG. 5b) until the ends are opposed to each other in the radial direction, that is, until the two magnets are again in a position to magnetically attract each other (FIG. 5b). Independently and rapidly advances in the guide passage 5.

Further, the working cylinder 17 of the embodiment shown in FIG.
The operation of is as follows. When the movable body 8 is retracted, the tip of the first magnet 6 serves as an N pole and the tip of the second magnet 18 serves as an S pole, which are directly opposed to each other in the radial direction and magnetically attract each other. Is stable (FIG. 6a). Then, when the movable body 8 is moved forward, the same poles of the first magnet 6 and the second magnet 18 repel each other, and the second magnet 18 passes through the inside of the first magnet 6, The second magnet 18 is displaced forward until the first magnet 6 is fully charged and separated in the distal direction, that is, until both magnets have a posture in which they do not affect each other magnetically (see FIG. 6).
b) At the time of this displacement, only the action cylinder 17 independently and rapidly advances in the guide passage 5.

Next, the blood reservoir 19 is formed into a fitting cylindrical portion 20 having a base end portion which is closely fitted into the fitting cylindrical portion 3 of the casing 1, and a distal end portion having a thick peripheral wall 21 as a substantially cylindrical shape. In the shape, a base end face is formed with an opening 22 through which at least a desired amount of the forward end of the advancing cylinder 17 can enter, and a flat front end is provided with a tapered recess 23.
With a structure in which a through hole 24 communicating with the inside is provided in the center of 3,
A short tubular projection 25 is provided on the peripheral edge of the recessed portion 23 on the tip end surface, and a tubular guide tubular portion 26 communicating with the through hole 24 is provided inside thereof along the axial direction.

The blood reservoir 19 is generally eccentrically provided with a notch 27 along the axial direction to have a cylindrical shape, and the tip end face of the notch 27 is formed as a back surface of the tapered concave portion 23 at the peripheral edge. Inclining downwards. Therefore, blood clot 19
When the blood is sucked from the guide tube portion 26 provided at the center of the blood, the blood is concentrated on the base end portion of the notch 27 having an extremely small volume, which facilitates the inspection and prevents wasteful collection of blood. it can. In addition, the peripheral wall 21 portion of the cutout 27 may be formed as a transparent window hole 28. It should be noted that the fitting tubular portion 20 has a cylindrical shape, and a step portion 29 is formed in a continuous portion with the peripheral wall 21, which is substantially the tip portion.

A disc-shaped sliding piece 31 is attached to the proximal end of the puncture needle 30.
Is integrally provided, and the sliding piece 31 serves as the blood reservoir 19 described above.
The cylindrical portion of the fitting tubular portion 20 is moved forward and backward along the axial direction, and the body of the puncture needle 30 is always located in the guide tubular portion 26 and simultaneously moved forward and backward. Then, between the base end surface of the sliding piece 31 and the step portion 29 of the blood reservoir 19,
A puncture needle 30 is provided so as to prevent the puncture needle 30 from slipping out in the proximal direction by disposing an elastic material 32 that repels in the axial direction and providing a stopper 33 at the proximal end of the fitting tubular portion 20 of the blood reservoir 19. 30 is biased in the proximal direction. However, although this stopper 33 prevents the puncture needle 30 from coming off, it must be opened so that it does not hinder the forward end of the working cylinder 17 from entering a predetermined amount.

At the stage before the start of use, it is advisable to attach the adhesive seal 34 to the distal end surface of the blood reservoir 19.

The blood collecting device of the present invention, in which the above-mentioned members are assembled, operates as follows. That is, in FIG. 1, the pressing body 15 is repulsed by the repulsive force of the elastic material 16 by the coil spring.
Moves backward, and the movable body 8 also moves backward accordingly, so that the working cylinder 17 moves backward, the base end portion of which is located inside the cylinder cylinder portion 2 and the leading end portion thereof is located inside the guide passage 5, The second magnet 18 of the second magnet 18 is located at a position where the second magnet 18 is closer to the proximal end and the first magnet 6 is closer to the distal end with respect to the first magnet 6 in the distal end portion of the guide passage 5, and is arranged along the axial direction. They are facing each other (state of FIG. 4a).

From this state, the adhesive seal 34 is peeled off,
When the protrusion 25 provided on the distal end surface of the blood reservoir 19 is strongly pressed against the skin A and the pressing body 15 is advanced against the repulsive force of the ammunition material 16, the first magnet 6 and the first magnet 6 are moved at predetermined positions. Second magnet 18
Magnetically attract each other, and only the action cylinder 17 is rapidly advanced so that the tip end thereof slides on the slide piece 3 of the puncture needle 30 in the blood reservoir 19.
1 and the puncture needle 30 is advanced to move the puncture needle 3
No. 0 protrudes from the through hole 24, and as shown in FIG.
It projects from 3. Therefore, the amount of protrusion of the tip of the puncture needle 30 can be arbitrarily adjusted by the length of the puncture needle 30, the length of the blood reservoir 19 along the axial direction, the amount of protrusion of the action cylinder 17, and the like.

When the puncture needle 30 protrudes and punctures the skin A, if the pressure on the pressing body 15 is released, the repulsive force of the elastic material 16 causes the pressing body 15 to retreat and return. 17 also retreats back. And the action cylinder 17
Due to the retraction, the puncture needle 30 also retreats due to the repulsive force of the bullet 32, and comes out of the skin A.

When the movable body 8 retracts as the pressing body 15 retreats, the piston 10 acts to create a negative pressure in the cylinder tube portion 2 and a negative pressure in the recess 23. Therefore, the skin A portion after the puncture needle 30 is pulled out rises and is sucked into the recess 23 as shown in FIG. 3, and a small amount of blood from the puncture wound is cut through the through hole 24 and the guide tube portion 26. It collects in the tip of the notch 27.

As described above, the protrusion 25 has an effect of dispersing the stimulus when the puncture needle 30 punctures, and in that respect, it is preferable that the caliber has a small diameter around the puncture site. However, in order to allow the skin A portion to rise into the recess 23, the protrusion 2 is to some extent
It is desirable that the diameter of 5 is large. When the skin A portion rises and is sucked into the concave portion 23 due to the negative pressure as described above, there is also an advantage that the puncture wound is opened and blood easily flows out. Therefore, the diameter of the projection 25 is selected and set within a common required range in which the effects of stimulus dispersion and skin A portion swelling can be achieved.

The blood collected as described above is examined by various means. If the anticoagulant is stored in the blood reservoir 19 in advance, the collected blood does not coagulate in a short time and the test is easy. After the blood is collected, the inspection means shown in FIG. 7 spectroscopically detects the color reaction state of the predetermined test paper 35 previously inserted in the blood reservoir 19 by blood from the outside through the window hole 28. It can be performed without any contact with blood.

The means of FIG. 8 can also be performed without contact with blood, which utilizes a conventional biosensor system. That is, the sensor 36 capable of detecting the measurement target component in blood is previously inserted into the blood reservoir 19,
The numerical value obtained by electrically processing this detection signal can be shown as data on the display unit 37 provided on the surface of the casing 1 and electrically connected to the sensor 36.

[0060]

As described above, according to the present invention, since the puncture needle for puncturing the skin is located inside and cannot be visually recognized from the outside, there is no fear of the patient during operation, and the magnetic force is utilized. Since it is moved forward, the impact such as vibration is small, there is no sound, and it is achieved instantly. Therefore, also in this respect, the fear can be minimized. And blood collection after puncture is
Since it is achieved by negative pressure suction at the same time as retracting the puncture needle, the puncture site is not limited to the sensitive fingertip or earlobe of the nerve, and can be performed from a capillary blood vessel such as an arm. Furthermore, at the time of puncturing, pressure around the puncture site is stimulated to stimulate pain points, and the sensation of pain points in the local area where puncture is actually performed is blunted. is there.

Since only the puncture needle and the blood reservoir are in contact with the patient during blood collection, it is sufficient to dispose of them after use, which is not only hygienic but also economical and extremely easy to handle. It becomes a thing.

The collected blood can be subjected to a predetermined test only within the blood reservoir, and it is not necessary to pour it out to the outside. Therefore, only the minimum necessary amount can be collected, and the test can be performed without contact. Hygienic and efficient.

Since the blood reservoir has a concave portion formed on the tip surface that comes into close contact with the skin, and a guide tube portion is provided inward from a through hole formed at the center of the concave portion, it is spouted from the puncture site. It surely sucks the blood inside and does not drip outside even if the negative pressure is released after suction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along the axial direction showing a state before the use of a blood collecting device of the present invention.

FIG. 2 is a cross-sectional view showing a limit of advancement of a puncture needle.

FIG. 3 is an enlarged cross-sectional view showing a suctioned state of blood after puncture.

FIG. 4 is a cross-sectional view showing an embodiment of the mutual positional relationship between the first magnet and the second magnet, in which a is a state before the operation and b is a state after the operation.

FIG. 5 is a cross-sectional view showing another embodiment of the mutual positional relationship between the first magnet and the second magnet, in which a is the state before the operation and b is the state.
Indicates the state after the operation.

FIG. 6 is a cross-sectional view showing still another embodiment of the mutual positional relationship between the first magnet and the second magnet, in which a shows the state before the operation and b shows the state after the operation.

FIG. 7 is a cross-sectional view showing an example of an inspection after blood collection.

FIG. 8 is a cross-sectional view showing another embodiment of the test after blood collection.

[Explanation of symbols]

1; casing, 2; cylinder cylinder part, 3; fitting cylinder part,
5; guide passage, 6; first magnet, 8; movable body, 9; cylinder rod, 10; piston, 11; working rod, 1
4; Assembly cylinder, 15; Pressing body, 16; Ammunition material, 17; Working cylinder, 18; Second magnet, 19; Blood reservoir, 20; Fitting cylinder part, 21; Peripheral wall, 22; Opening part, 23 Recessed portion, 24; through hole, 25; protrusion, 26; guide tube portion, 30; puncture needle, 3
2; ammunition.

Claims (11)

[Claims] 1. A cylinder cylinder part (2) sealed at a base end part.
And a fitting tube portion (3) having an open tip at the tip, and the cylinder tube portion (2) and the fitting tube portion (3) have a guide passage (5) having a reduced diameter at the axial center position. ), And further penetrates the base end of the cylinder tubular portion (2) with the linear tubular casing (1) in which the first magnet (6) is provided on the wall surface of the distal end portion of the guide passage (5). A piston (10) is provided at the tip of a cylinder rod (9) that is movably moved forward and backward in the cylinder tube portion (2), and an action rod (11) is extended at the tip of the piston (10). The movable body (8) and the working rod (11) are assembled in the base end portion such that the action rod (11) cannot be pulled out and can be moved forward and backward, and the second magnet (18) is assembled in the tip end portion, and the guide passage (5) is formed. Is arranged so that it can move forward and backward, and the tip end is in the fitting cylinder part (3) at the forward limit. A working cylinder (17) that projects and a fitting cylinder part (20) that closely fits the base end part into the fitting cylinder part (3), and the working cylinder (17) that has advanced to the base end face. An opening (22) through which the tip portion penetrates is formed, a tapered concave portion (23) is further provided on the flat distal end surface, and a through hole (2) communicating with the inside is formed at the center of the concave portion (23).
4) provided with a substantially cylindrical blood reservoir (19), and the blood reservoir (19) is housed in the blood reservoir (19) so that it cannot be pulled out and can be moved forward and backward. And a puncture needle (30) protruding from 24), and at a predetermined forward position of the action cylinder (17), due to the mutual magnetic force between the first magnet (6) and the second magnet (18), A blood collecting device, wherein the action cylinder (17) is rapidly advanced. 2. When the action cylinder (17) is in the retracted posture, the first magnet (6) is axially opposed to each other, and the second magnet (18) is axially opposed to each other, and The blood collecting device according to claim 1, wherein the polarity of the first magnet (6) on the proximal end side and the polarity of the second magnet (18) on the distal end side are the same. 3. When the action cylinder (17) is in the retracted posture, the first magnet (6) and the tip end of the second magnet (18) are radially opposed to each other, and The blood sampler according to claim 1, wherein the polarity of the one magnet (6) on the proximal end side is different from the polarity of the second magnet (18) on the distal end side. 4. The first magnet (6) and the second magnet (18) are directly opposed to each other in the radial direction in the retracted posture of the action cylinder (17), and the first magnet (6) ) The polarity on the proximal end side,
The blood collecting device according to claim 1, wherein the second magnet (18) has the same polarity on the tip side. 5. The assembly cylinder (14), which is assembled in a posture extending to the base end of the casing (1) and has both ends open, projects from the base end of the assembly cylinder (14). The pressing body (15) is assembled so that it can be moved forward and backward in the posture, and the assembly cylinder (1
An elastic material (16) which repels in the axial direction is arranged between the pressing member (15) and the pressing member (15), and the base end of the cylinder rod (9) is attached to the pressing member (15). The blood collecting device according to 2, 3, or 4. 6. The ring-shaped first magnet (6) is concentrically arranged in the guide passage (5).
The blood collecting device according to 4 or 5. 7. The short tube-shaped projection (25) is provided on the periphery of the recess (23) on the distal end surface of the blood reservoir (19).
The blood collection device according to 3, 4, 5, or 6. 8. The adhesive seal (34) is attached to the distal end surface of the blood reservoir (19), as claimed in any one of claims 1, 2, 3, 4, 5, 6, 7.
Blood collection device described in. 9. The blood vessel (19) according to claim 1, 2, 3, 4, wherein at least a part of the peripheral wall (21) is made of a transparent material.
The blood collecting device according to 5, 6, or 7. 10. The blood guide body (19), wherein a tubular guide tubular portion (26) communicating with the through hole (24) is provided along the axial direction. The blood collecting device according to 5, 6, 7, 8, or 9. 11. An elastic material (32) which is axially repulsive is disposed between the puncture needle (30) and the blood reservoir (19). , 8, 9, 10 blood collection device.