Surgery – Truss – Pad
Patent
1995-03-29
1997-10-28
Hindenburg, Max
Surgery
Truss
Pad
128770, 606182, A61B 500
Patent
active
056808720
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a simple blood-collecting device. Specifically, it relates to a simple blood-collecting device which allows one to collect one's own blood.
BACKGROUND ART
In recent years, which have seen an increase in the number of patients suffering from various adult diseases such as diabetes, believed to be due to changes in eating habits and a greater level of stress, a heavy burden is being imposed on the daily lives of the patients themselves who must make regular visits to the hospital, and therefore as blood sugar tests become an ever more usual part of their daily lives, the procedure of blood collection itself is receiving more attention as an important topic. The problem of the pain accompanying blood collection becomes a more significant issue in cases where the procedure must be repeated, and it is becoming a serious obstacle particularly for insulin-dependent patients, which include a large number of children. Furthermore, the infection of patients via blood has become a social problem in recent years, and therefore, in the interest of preventing especially serious diseases such as AIDS and hepatitis, a device has been sought which may allow patients to take repeated blood collections by themselves without undue burden.
DISCLOSURE OF THE INVENTION
Nevertheless, no device has been proposed yet which allows painless and simple collection of blood.
In light of the prior art, the present invention is aimed at providing a device which allows blood to be collected in a painless, reliable manner, which is a blood-collecting device comprising a decompression chamber, a skin suction portion, paracentetic means and paracentesis-terminating (withdrawal) means.
Because this blood-collecting device has a very simple construction, is compact and lightweight and uses no special parts, it is economical and may be used in a disposable manner.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1(a) to 1(d) are cross-sectional sketches of an embodiment of the device according to the present invention in its states of operation.
FIG. 2 is a drawing showing the device of FIG. 1 in a state of use.
BEST MODE FOR CARRYING OUT THE INVENTION
The characteristics of the present invention are as follows. Decompression suction is concentrated on a local surface of the skin. As this local decompression suction is induced, the inner surface of the skin becomes congested with blood, causing enlargement and swelling of the epidermis. This swollen skin comes into contact with the paracentetic means preset at a prescribed position. Because the swollen skin is in a sufficiently enlarged state, the paracentetic means easily penetrates the skin (epidermis, etc.). After a certain period of time, a terminating procedure is performed to withdraw the paracentetic means, and decompression suction is again initiated.
During the process of decompression suction, the section closed by the penetrating section (tip) of the paracentetic means is opened when the paracentetic means is drawn out from the skin, allowing the blood to flow out. Because of the local suction, no pain is felt even when the paracentetic means pierces the skin, since that is offset by the irritation of the suction.
According to the present invention, the decompression chamber is a means for creating suction at the surface of the skin, and typically performs the decompression function either mechanically and chemically, manually or automatically, etc., though it is not particularly restricted. An example of a decompression chamber may be an ampule- or cassette-like piece preformed in a decompressed state using an airtight material; or a device which creates a suction effect by inducing temperature changes in a molecular sieve. Also, examples of paracentetic means include, in either plural or single form, needles, hollow needles, dentate-sided needles, acupuncture/moxibustion needles and microblades.
The length of the paracentetic means is preferably a few hundred micrometers to a few millimeters, but it is not particularly restricted.
REFERENCES:
patent: 4653513 (1987-03-01), Dombrowski
patent: 5054499 (1991-10-01), Swierczek
patent: 5153828 (1992-10-01), Inoue et al.
Patent Abstracts of Japan vol. 16, No. 507, Jun. 07 1992.
Sesekura Tetsuya
Watanuki Junichi
Atwood Pamela L.
Hindenburg Max
Kabushiki Kaisya Advance
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