JPH069605U - Blood collection device - Google Patents

Abstract

(57) [Summary] [Purpose] A blood sample that is highly safe and accurate when collecting blood, and that can collect a relatively large amount of blood that is sufficient for general testing and testing without variation and that does not feel pain. It is to provide an instrument. A tubular shape having a lancet a provided with a puncture needle 1 and a drive device for instantaneously reciprocating the lancet puncture needle inside a blood sampling site and having a housing portion for mounting the lancet at one end Body part, a head cylinder b having openings 2 and 3 at both ends and detachably attached to the body part, and a lid body fitted into the free end opening 2 of the head cylinder body. It is a blood-collecting device that is provided with c. [Effect] An accurate blood collection of 2.0 ± 0.5 mg enabled painless operation from the abdominal wall. And compared to the conventional blood collection method,
It is possible to prevent the risk of micro blood infection and to provide a blood sampling device with extremely high safety and accuracy.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a blood collecting device, and more particularly to a blood collecting device capable of collecting blood with almost no pain, which has heretofore been impossible.

[0002]

[Prior art]

 Generally, when a small amount of blood is collected for blood component tests, parasites, and protozoa tests, blood is collected from highly exposed areas such as fingertips, ear lobes, and foot pads. As a blood sampling method, an incision with a small female lancet, a lancet device with a safety device, and the like have been reported by the applicant (Japanese Patent Laid-Open No. 56-161038 and Japanese Utility Model Publication No. 1-15368). The method of collecting blood from the abdominal wall and the like has been attempted by the present inventors only to collect a very small amount of blood for use with a high-sensitivity blood glucose measuring device, but the thickness of the blood collecting site, the depth of puncture, the difference between individuals, etc. depending on the animal species. There is a problem of, and it has not been put to practical use.

[0003]

[Problems to be solved by the device]

 With commercially available small female lancets, the size of the wound depends on the user and the situation, and may cause more scratches than necessary. Also, because the wound is too small and the amount of blood collected is insufficient or there are variations, it is not accurate, such as having to puncture many times, and further gives fear to the patient. There was a problem.

In addition, blood sampling from a highly exposed area has a problem of a trace blood-borne infection such as acquired immune deficiency syndrome (AIDS), and it is possible to collect blood from a low exposed area such as the abdominal wall or thigh. Development of a blood sampling method and a blood sampling device has been desired.

The present invention has been made in view of the above problems, and its object is to provide a relatively large amount of blood that is highly safe and accurate at the time of collecting blood and is sufficient for general test and examination. It is an object to provide a blood collection device that can be collected without any pain and hardly feels pain.

[0006]

[Means and Methods for Solving the Problems]

 The present inventor has made various studies on the solution to the above-mentioned problems and found that a lancet equipped with a puncture needle is fitted to the head cylinder and its free end opening, which are the parts for instantaneously reciprocating inside the blood sampling site. We paid attention to the improvement of the lid and so on.

That is, the gist of the present invention is to provide a lancet equipped with a puncture needle and a container for mounting the lancet at one end, and instantaneously reciprocally drive the lancet puncture needle inside the blood sampling site. A tubular main body provided with a drive device, a head cylinder having openings at both ends and detachably attached to the main body, and a free end opening of the head cylinder are fitted. A blood sampling device including a lid.

The present invention relates to a blood collecting device that collects blood from a site with low exposure such as the abdominal wall or thigh. In the present invention, the head cylinder, which has openings at both ends and is detachably attached to the main body, has an inner diameter of the free end opening of about 5 to 10 mm when it is used on a human. Preferably. In addition, after the lancet is stored, a lid is provided at the tip opening portion that is applied to the abdominal wall of the head cylinder to prevent contamination of the puncture needle. The head cylinder, lancet and lid described above are preferably discarded so that they are discarded after each blood collection to prevent blood contamination, but if multiple blood samples are taken from the same sample in succession, they may be discarded multiple times. It can also be used.

Next, in order to adjust the puncture depth at the blood sampling site, a device is individually manufactured according to the species of animal such as human, large and small animals. Apply a hollow cylindrical cap to the tip of the blood sampling site to adjust the puncture depth. The head cylinder that houses the lancet is made elastic. A means such as providing a button-type or dial-type lancet puncture trajectory restraining device on the head cylinder that houses the lancet is used. Then, it is preferable to change the diameter of the puncture needle depending on the blood sampling site as needed.

Further, in the present invention, as a driving device for instantaneously reciprocating the lancet puncture needle inside the blood sampling site, a spring type vertical movement device generally used for a pen tip pushing type ballpoint pen or the like is used. When the head cylinder for accommodating the lancet and the tubular main body including the drive unit are joined, the lancet is mounted in the lancet accommodating portion of the main body. Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.

[0011]

【Example】

 (A) Example of Blood Collection Device FIG. 1 shows a head cylinder, a lancet equipped with a puncture needle, and a lid of a blood collection device according to the present invention. That is, (1) of FIG. 1 is a cross-sectional side view showing a state in which the tip of the puncture needle 1 of the lancet a is fitted to the lid c, and this is fitted to the free end opening of the head cylinder b. It is a figure. And (2) is a side view of the lancet a equipped with the puncture needle 1, (3) is a head cylinder b consisting of the free end opening 2, the opening 3 and the screw thread 4, and (4) is the lid. Body c, and (5) and (6) are perspective views showing a head cylinder b, a lancet a having the puncture needle 1, and a lid c.

Next, FIG. 2 shows a tubular main body portion having a drive device in the blood collecting device according to the present invention. That is, a driving device for a lancet driven by the spring 6 is provided inside the tubular main body 5. In this drive device, a housing 8 for mounting the above-mentioned lancet is provided at the tip of the vertical moving body 7.

In actual use, the vertical moving body 7 of the lancet drive device has the handle 9 and the tubular main body portion 5 is pulled toward the front until the stopper 10 is fixed in the stop hole 11. Further, after storing the lancet and screwing the head cylinder with the lid onto the main body, the button 12 is pressed to push out the container by the force of the spring, and the lancet is mounted. After that, the lancet can be driven by repeating the operation of holding the handle 9 again and pulling the tubular main body portion 5 toward the front side until the stopper 10 is locked in the stopper hole 11 and fixed. Further, the puncturing operation is completed by removing the lid of the head and bringing it into close contact with the blood sampling site and pressing the button 12. In other words, the elastic force of the spring causes the lancet to be pushed out and pulled back instantly. FIG. 3 is an external view of the abdominal wall blood collecting device according to the present invention with the lid removed.

(B) Example of blood sampling test (a) Examination test of blood sampling site For 12 healthy male volunteers (aged 25 to 45 years old), known on the skin surface of the upper arm, the forearm, the abdominal wall, the thigh, and the lower leg in five places. Using a blood sampling instrument Autoclic (manufactured by Boehringer Mannheim), the subject himself stabbed the needle (diameter 0.5 mm, needle length 3 mm) and rubbed blood from the needle hole. The rubbing time was 1 minute, the blood that had come out on the skin surface was sucked into a filter paper, and the weight was measured with a precision meter (R180D manufactured by Zalittorius). The results are shown in FIGS. 4 and 5, and it is clear that the amount of collected blood varies in the conventional blood collecting device. The amount of blood collected at each site was 6.10 ± 4.42 mg in the upper arm, 1.65 ± 4.42 mg in the forearm, 8.55 ± 6.78 mg in the abdominal wall, 4.00 ± 2.47 mg in the thigh, 1.79 ± 1.51 mg in the lower leg, and the abdominal wall> upper arm> thigh> lower leg or forearm. It was in order. Given that this is the frequency at which a blood volume of 2.5 mg or more was obtained, 12 times in the upper arm 9 times (75%), 2 times in the forearm (17%), 11 times in the abdominal wall (92%) and 8 times in the thigh (67%). %) And 6 times (50%) on the lower leg. In the case of the abdominal wall, although blood collection was good, it was revealed that there was a blood sampling error within a wide range of 2.0 to 24 mg.

(B) Examination of Blood Collection Device Although the above test revealed that blood collection in the abdominal wall was good, the length of the puncture needle, the length of the puncture needle, in order to accurately collect a predetermined amount of blood without individual differences or operation errors. The thickness was examined using 5 beagle dogs (body weight: 10 ± 5 kg) aged 1 year and 6 months. As a result, it was found that a puncture needle having a diameter of 0.5 to 1.5 mm and a needle length of less than 10 mm is required to collect about 2.0 mg of blood.

(C) Self-Blood Collection Test Using the Device According to the Present Invention Next, the same volunteers (12 persons) as in the examination of the blood collection section shown in (a) above had a puncture needle diameter of 0. Using the blood collection device of the present invention adjusted to have a needle length of 5 mm and a needle length of 3 mm, abdominal wall blood collection was performed, and all of the blood samples were within a range of 1.5 mg to 2.5 mg and a stable amount of blood was obtained without variation. . The result is shown in FIG. In addition, when interviews were conducted regarding pain and operability, all of the respondents answered that they had less pain and were easier to operate than in Test A. By using the blood collecting device according to the present invention, blood can be collected well not only in the abdominal wall but also in the thigh.

[0017]

[Effect of device]

 ADVANTAGE OF THE INVENTION According to this invention, the blood-collecting device which has high safety and accuracy at the time of blood collection, can collect a comparatively large amount of blood sufficient for general tests, without variation, and is almost painless. Can be provided. That is, the length, shape, and needle diameter of the puncture needle were appropriately set, and by performing the puncture instantly, an accurate blood collection amount of about 2.0 mg and a painless operation at the blood collection site were made possible. Traditionally, capillary blood is collected from the fingertips, ear lobes, and heels where there is no clothing, but this is a blood sampling method that has a high risk of micro blood infections such as AIDS. However, by using the device according to the present invention, it is possible to collect blood in an amount that can be used for a simple test in a portion that usually wears clothes, with a simple operation and with almost no pain, and to further prevent a trace blood infection. Can be prevented. Further, the device according to the present invention can be used very effectively not only in humans but also in general blood collection including mammals.

[Brief description of drawings]

FIG. 1 is a head cylinder of a blood collecting device according to the present invention,
It is a side view or a perspective view showing a lancet provided with a puncture needle and a lid.

FIG. 2 is a side sectional view showing a cylindrical main body portion provided with a driving device of a blood collecting device according to the present invention.

FIG. 3 is a view showing the external appearance of the blood collecting device according to the present invention with the lid removed.

FIG. 4 is a graph showing the amount of blood collected from the upper arm and the forearm when a known blood collecting device is used.

FIG. 5 is a graph showing the amount of blood collected from the abdominal wall, thigh, and lower leg when using a known blood collecting device.

FIG. 6 is a graph showing the amount of blood collected from the abdominal wall by the blood collecting device according to the present invention.

[Explanation of symbols]

 a lancet b head cylinder c lid 1 puncture needle 2 free end opening 3 opening 4 screw thread 5 threaded body 5 tubular body 6 spring 7 up-and-down moving body 8 accommodating section 9 handle 10 stop 11 stop hole 12 button

Claims (3)

[Scope of utility model registration request] 1. A tubular shape comprising a lancet having a puncture needle, a container for mounting the lancet at one end, and a drive device for instantaneously reciprocating the lancet puncture needle inside a blood sampling site. Body part, a head cylinder body having openings at both ends and detachably attached to the body part, and a lid body fitted into the free end opening part of the head cylinder body. Blood collection device characterized by. 2. The inner diameter of the free end opening of the head cylinder, which has openings at both ends and is detachably attached to the main body, is 5 to 5.
The blood collecting device according to claim 1, which has a length of 10 mm. 3. The lancet has a diameter of 0.5 to 1.5 m.
The blood collecting device according to claim 1, further comprising a puncture needle having a length of m and a needle length of less than 10 mm.