Surgery – Diagnostic testing – Liquid collection
Patent
1997-01-27
1999-04-06
Apley, Richard J.
Surgery
Diagnostic testing
Liquid collection
600575, 600577, 600578, A61B 500
Patent
active
058910530
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a blood-collecting device.
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, blood-transmitted diseases have 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; yet, no blood-collecting device has been realized which can satisfy these conditions.
Conventional blood-collecting devices in common use are devices which cause a powerful impact of a small blade into the tip of the finger, cutting the skin and extracting blood, but despite the mere instant of contact between the blade and the skin, the resulting pain is more than imagined and thus its daily use has been quite difficult to sustain.
Incidentally, devices have been proposed which draw blood by first suctioning the skin and then forming a puncture in the suctioned section with a paracentesis needle; however, it is often the case that the amount of blood taken is less than the amount required for the measurement, and this has created uncertainties from the standpoint of stably obtaining reliable blood samples amounts.
DISCLOSURE OF THE INVENTION
In light of these circumstances, the present invention accomplishes reliable collection of blood in a substantially painless manner, by a construction comprising a combination of suction means for suctioning the skin by decompression, paracentetic means for dropping a paracentetic member into the skin in the aforementioned suctioned state to impact the skin, and removal means for drawing out the aforementioned impacted paracentetic member from the skin.
The present invention also accomplishes reliable collection of blood in a substantially painless manner by way of a multiple-needle construction as the paracentetic means.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 and 2 are cross-sectional views of an embodiment of a device according to the invention.
FIGS. 3(a), 3(b) and 3(c) are illustrations of the operation of the device of the aforementioned embodiment.
FIGS. 4(a), 4(b), 5(a) and 5(b) are illustrations of an embodiment of paracentetic means used in a device according to the invention.
FIGS. 6(a), 6(b), 7(a), 7(b), 8(a), 8(b) and 8(c) are illustrations of another embodiment of paracentetic means used in a device according to the invention.
FIGS. 9(a) and 9(b) are illustrations of an embodiment of the paracentetic means section of a device according to the invention, with FIG. 9(a) being a side view showing a partial cross-section, and FIG. 9(b) being a front view.
FIG. 10 is an illustration of an embodiment of a device according to the invention.
FIGS. 11(a), 11(b) and 11(c) are illustrations of the operation of the device of the aforementioned embodiment.
BEST MODE FOR CARRYING OUT THE INVENTION
In the above reference to substantial painlessness, the pain is largely affected by the feelings of the person from whom the blood is collected, i.e. by a subjective factor, and therefore it is intended to include small degrees of pain, though lighter than the pain normally associated with blood collection as described above in regard to the prior art, while including a degree of pain which is acceptable on a contin
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patent: 5318584 (1994-06-01), Lange et al.
patent: 5368047 (1994-11-01), Suzuki et al.
patent: 5680872 (1997-10-01), Sesekura et al.
Japanese Patent Abstract, Publication No. 253173, Publication Date Aug. 1995, p. 1 (no translation).
Apley Richard J.
Kabushiki Kaisya Advance
Yu Justine R.
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