JPH0666632U - Blood pumping device - Google Patents

Abstract

(57) [Abstract] [Purpose] A blood suction device that removes the negative pressure from the lancet-pierced site each time the blood pressure is removed, or a blood suction device that attaches a suction device to the main body tube that is always set,
Increase the amount of blood collected for a given suction force. [Composition] In order to collect blood as small droplets on the skin,
The rubber ball 2 is attached to the body tube 1 which is set at the puncture site with the lancet and has an inner diameter larger than the outer diameter of the blood droplet to be collected.
Along with a suction device such as the above, a skin squeezing tool utilizing a leaf spring 8 or the like that is displaced inward from a position surrounding a skin portion raised by suction by the suction device is provided at the tip portion of the main body tube 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention collects blood as small droplets on the skin and sets it on the part to be punctured with a lancet in order to detect its blood sugar level, lactic acid, cholesterol, neutral fat, alcohol, oxygen, carbon dioxide, pH, etc. The present invention relates to a blood suction device.

[0002]

[Prior art]

 For example, in order to easily measure the blood glucose level, insert the chip-shaped electrode sensor into the electrode insertion port formed in the small handheld device body, and immerse it in the droplet collected by lancet on the skin. A simple measuring instrument is known in which blood is sucked into the device body by a capillary phenomenon and the measurement result is displayed on the display unit on the surface of the device body. It has also been proposed that performing such measurements at intervals of 10 to 15 minutes will lead to the development of an artificial pancreas. This type of blood sampling is the easiest to perform at the fingertips, and the required blood volume is easily obtained.However, from the viewpoints of pain and the area of repeated blood sampling, the blood is collected in the upper arm, abdomen, thigh, etc. Another option is to pierce the lancet and squeeze the blood around it to get the required droplets. At this time, according to JP-A-62-38140, a lancet support slidably supported in a tube and provided with a gasket around it is directed toward the skin in order to suppress pain and obtain a sufficient blood volume. A blood sampling device has been proposed that sucks blood fluid by generating a negative pressure in the tube when it is moved back by a spring force after being moved and punctured.

However, when using this device, if the tube is pulled away from the skin against the suction force after the blood is drawn in the state where the skin is pulled by negative pressure, a sudden return and abruptness of the pulled skin are caused. Due to the inrush of outside air, small droplets of blood are scattered around, so that it is necessary to collect an excessive amount of blood than necessary, and the inside of the tube is contaminated. Furthermore, the forward movement speed of the needle when puncturing with the lancet is slowed by friction with the tube wall of rubber or the like attached to the cylinder in order to maintain airtightness, which increases pain during skin puncture. Furthermore, the structure is complicated, the manufacturing cost is high, and the needle replacement is time-consuming and inconvenient.

[0004]

[Problems to be solved by the device]

 Therefore, the applicant of the present application discloses, in Japanese Patent Application No. 4-50443, that the blood is set as a small droplet on the skin and is set at a punctured site with a lancet, and the outer diameter of the blood droplet to be collected is smaller than that of the blood droplet. We proposed a blood suction device with a suction device attached to a transparent main body tube with a large inner diameter, and an intake hole for sucking outside air into the main body tube. In addition to this proposal, if you feel that the operation is a little troublesome, make the blood suction device a syringe type without a suction hole in the main body tube, and after the suction operation upward, It is also possible to return to the position. As a result, the negative pressure at the time of suction can be eliminated by opening the intake hole or returning the inner cylinder, etc., and it is possible to collect blood without scattering according to the patient without scattering. Further, by separating the lancet and the suction mechanism, the time and effort required for exchanging the needle are reduced, and the needle speed during blood collection can be easily adjusted freely.

In view of the above, the present invention eliminates the negative pressure from the lancet-pierced site each time blood is drawn, or attaches a suction device to the main body tube that is always set for an artificial pancreas. An object of the present invention is to increase the amount of blood collected for a predetermined suction force in a blood suction device that collects blood.

[0006]

[Means for Solving the Problems]

 In order to collect blood as small droplets on the skin, the present invention attaches a suction device to a body tube that is set at the lancet puncture site and has an inner diameter larger than the outer diameter of the blood droplets to be collected. At the same time, a feature of the present invention is that a skin squeezing device that displaces inward from the position surrounding the skin portion raised by suction by the suction device is provided at the tip portion of the main body tube.

[0007]

[Action]

 When operating the blood-suction device manually, immediately after inserting the lancet into a site other than the fingertip, touch the tip edge of the main body tube on the skin so that the puncture site occupies almost the center of the main body tube, and then inhale. Suctioning with the device draws blood from the puncture site and creates a small drop of blood on the skin. Observe through the main body tube, and if necessary, squeeze and raise the amount of suction by displacing the raised skin portion inward by operating the skin squeezing tool, that is, by displacing it so as to narrow the surrounding area. After the formation of droplets, the negative pressure for suction is released, the pulled skin is returned to the normal position, and the skin adsorption on the tip of the main tube is released. When the blood suction device is always set and automatically activated, the blood suction device should be set in advance at the lancet puncture site, and set beforehand after the suction device that was automatically activated when the lancet was punctured. After a certain period of time, the skin squeezing device is automatically started, and then the negative pressure is automatically released.

[0008]

【Example】

 1 and 2 show a blood suction device according to a first embodiment of the present invention. Reference numeral 1 is a synthetic resin transparent main body tube having an inner diameter of, for example, about 20 mm, which is sufficiently larger than the required blood collection droplet, and has a rigid portion 1a, a tip elastic portion 1b, and a tip rigid ring. And a flange portion 1c. A branch pipe 1d is provided on the rigid portion 1a so as to project laterally, and a rubber ball 2 is attached as a suction device capable of elastically returning from a compressed state to a spherical shape.

As shown in FIG. 2A, an intake hole 3 is formed at the top of the rigid portion 1a, a rod 7 is inserted and a valve 5 is attached to the tip end thereof, and a button 7a is attached to the base end portion thereof. Has been formed. The valve 5 has a larger diameter than the intake hole 3, and a spring 6 is mounted between the intake hole 3 and the button 7a to close the intake hole 3 in a normal state. Further, both ends are separated from each other on the outer periphery of the elastic portion 1b with a gap serving as an opening / closing operation stroke, and are outwardly bent as knobs 8a. Is installed. The leaf spring and the elastic portion 1b may be intentionally not transparent.

When using the blood sucking device 9 configured as described above, a lancet, for example, is stabbed in the thigh, and immediately after that, the rubber ball 2 is compressed with a finger and the intake hole 3 is opened by the valve 5. The flange portion 1c is set on the surrounding skin so that the puncture site occupies the substantially central portion of the main body tube 1 in the closed state, and then the rubber ball 2 is released. As a result, due to the elastic return of the rubber ball 2 to the spherical shape, the flange portion 1c is adsorbed to the skin, a negative pressure is generated in the main body tube 1, and the skin raised from the surrounding skin as shown in FIG. 2B. The raised portion 4 is generated, and the blood droplet 4a gradually begins to be generated by the suction from the puncture site in the central portion.

In this state, when the knobs 8a on both sides are pinched, the inner diameter of the leaf spring 8 bends and becomes smaller toward the inside, that is, toward the center of the main body tube 1, so that the skin ridge 4 is squeezed from the surroundings. Thus, the droplet 4a having a size required for the blood glucose measuring device, for example, a volume of 2.5 to 5 μl is easily collected. After blood collection, the button 7a is pushed against the spring force to open the intake hole 3, and the outside air flows into the tube with a throttling action corresponding to the size of the intake hole and is pulled. The skin gently returns to the normal position, and the adsorption of the flange portion 1c to the skin is released. As a result, no force is generated to break the droplet 4a when the blood sucking device 9 is detached, and therefore, a small amount is generated when the flange portion 1a adsorbed to the pulled skin is forcibly separated against the suction force. The scattering of the drops 4a is avoided.

FIG. 3 shows a second embodiment of the present invention. A main body pipe 10 is provided with a ring-shaped pipe portion 11 having a flange portion 11a at the tip portion, a suction device and an intake hole, and is rotatably mounted in an airtight state on the outer periphery of the ring-shaped pipe portion 11. It is composed of a part 12. In the skin squeezing tool, one end 15a is fixed to the inner wall of the tube portion 11, and an inverted L-shaped attachment portion 15b formed at the other end with a gap is fixed to the inner wall of the tube portion 12. It is composed of a synthetic resin ring 15 exhibiting bending elasticity.

In use, suction is performed in the illustrated state, and then the tube portion 12 is rotated in a direction in which both ends of the ring 15 approach each other, so that the inner diameter is narrowed and the raised skin is squeezed.

4 and 5 show a third embodiment of the present invention. The main body tube 20 is formed of a ring-shaped tube portion 21 outside the tip portion and an inner tube portion 22 rotatably mounted in an airtight state on the inner periphery of the tube portion. The skin squeezing tool has a bottom surface 25 formed on the tube portion 21 and having a substantially oval cutout 25a, and a bottom surface 25 formed on the tube portion 22 and having substantially the same oval shape, and has a bottom surface 25 from above. It is composed of a bottom surface 26 that contacts. FIG. 4 shows a cross section of both ellipses at the minor axis position.

When the tube portion 22 is rotated while suctioning the skin, the bottom surface 26 displaces the opening area of the notch 25a inward and gradually narrows it, so that the raised skin is gradually squeezed to 90 °. At the time of rotation (state shown in FIG. 5), the area becomes the minimum and the maximum diaphragm position is reached.

FIG. 6 shows a fourth embodiment of the present invention. The main body tube 30 is formed of a ring-shaped tube portion 31 on the outer end of the tip portion and an inner tube portion 32 rotatably mounted in an airtight state on the inner periphery of the tube portion. The skin squeezing device is attached to a ring-shaped bottom surface 32b around the central opening 32a of the tube portion 32, and is composed of a tapered ring-shaped elastic body 33 whose inner diameter gradually increases toward the tip. As a result, when the tube portion 32 is pushed, the elastic body 33 is compressed and comes into contact with the skin.

The tube portions 12, 22, 32 are not limited to the rubber balls shown in FIG. 1, but may be a vacuum suction device that sucks automatically, or a suction device of various types such as a manually operated suction device such as a syringe. The valve can be attached to the intake holes, and the intake holes formed in these can be closed with a finger without intentionally attaching a valve. Further, the blood sucking device according to the third and fourth embodiments described above is a syringe type in which the suction hole is abolished, and the inner cylinder is suctioned upward to generate a negative pressure and then returned to the original position. It can also be configured to eliminate the negative pressure.

When the blood suction device of the present invention is used for collecting blood from an artificial pancreas, the suction device is automatically started immediately after puncturing, and the skin squeezing device is provided with a driving mechanism such as a motor. By attaching the actuator, the actuator is automatically activated after a predetermined time in response to the operation of the suction device. At this time, the main tube need not be made transparent.

[0019]

[Effect of device]

 As described above, according to the present invention, by sucking the lancet into the skin with the blood suction device and then sucking out the puncture site, it is possible to stably collect small blood drops even from a site with less pain and low blood vessel concentration. Become. Then, the blood collecting state is monitored through the transparent main body tube, and after the suctioning operation is finished, the raised skin part is squeezed or the blood collecting state is automatically monitored after the suctioning operation without externally monitoring the blood collecting state. By activating the tool, it becomes possible to increase the amount of blood collected as compared with the case of using only suction.

[Brief description of drawings]

FIG. 1 is a front view of a blood suction device according to a first embodiment of the present invention.

FIG. 2 shows a partial structure of the blood suction device, FIG. 2A is a plan view of a main body tube portion thereof, and FIG. 2B is a perspective view of a portion to which a skin squeezing device is attached.

FIG. 3 is a perspective view of essential parts of a blood suction device according to a second embodiment.

FIG. 4 is a cross-sectional view of essential parts of a blood suction device according to a third embodiment.

FIG. 5 is a plan view of a bottom portion of the blood suction device.

FIG. 6 is a cross-sectional view of essential parts of a blood suction device according to a fourth embodiment.

[Explanation of symbols]

 1, 10, 20, 30 Main body tube 2 Rubber ball 3 Intake hole 8 Leaf spring 15 Ring 25, 26 Bottom surface 25a, 26a Notch 33 Elastic body

Claims (5)

[Scope of utility model registration request] 1. A suction device is attached to a body tube having an inner diameter larger than an outer diameter of a blood droplet to be collected, which is set at a puncture site to collect blood as a small droplet on the skin. At the same time, a blood squeezing device is provided at a tip end portion of the main body tube, the skin squeezing device being displaced inward from a position surrounding a skin portion raised by suction by the suction device. 2. A flexible portion is formed at a distal end portion of the main body tube, and a skin squeezing tool is attached around the flexible portion, and both ends are spaced from each other so that they can be pinched by hand. The blood sucking device according to claim 1, wherein the blood sucking device comprises a ring having a bending elasticity and being bent outwardly. 3. The body tube is formed of a first ring-shaped tube portion at the tip portion and a second tube portion rotatably mounted in the tube portion in an airtight state, and a skin squeezing tool is provided. ,
One end is fixed to the inner wall of the first ring-shaped tube portion, and the other end having a gap at the one end is fixed to the inner wall of the second tube portion and exhibits bending elasticity. The blood suction device according to claim 1, wherein the blood suction device comprises a ring. 4. The body tube is formed of a first ring-shaped tube portion at a tip portion and a second tube portion rotatably mounted in an airtight state on an inner wall of the tube portion, and a skin diaphragm. A tool having a bottom surface formed in the first ring-shaped tube portion and having a substantially elliptical cutout, and a cutout formed in the second tubular portion and having substantially the same shape as the elliptical shape, The blood suction device according to claim 1, further comprising a bottom surface that comes into contact with the bottom surface from above. 5. The body tube is formed of a first ring-shaped tube portion at the tip portion and a second tube portion rotatably mounted in an airtight state on the inner wall of the tube portion, and a skin diaphragm. The blood suction according to claim 1, wherein the tool is attached to a ring-shaped bottom surface around the opening of the second tube portion, and is constituted by a ring-shaped elastic body whose inner diameter gradually increases toward the tip. apparatus.